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 AD_LINK_SPEED_100000MBPS, 98 }; 99 100 /* compare MAC addresses */ 101 #define MAC_ADDRESS_EQUAL(A, B) \ 102 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 103 104 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; 105 static u16 ad_ticks_per_sec; 106 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 107 108 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; 109 110 /* ================= main 802.3ad protocol functions ================== */ 111 static int ad_lacpdu_send(struct port *port); 112 static int ad_marker_send(struct port *port, struct bond_marker *marker); 113 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 114 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 115 static void ad_tx_machine(struct port *port); 116 static void ad_periodic_machine(struct port *port); 117 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 118 static void ad_agg_selection_logic(struct aggregator *aggregator, 119 bool *update_slave_arr); 120 static void ad_clear_agg(struct aggregator *aggregator); 121 static void ad_initialize_agg(struct aggregator *aggregator); 122 static void ad_initialize_port(struct port *port, int lacp_fast); 123 static void ad_enable_collecting_distributing(struct port *port, 124 bool *update_slave_arr); 125 static void ad_disable_collecting_distributing(struct port *port, 126 bool *update_slave_arr); 127 static void ad_marker_info_received(struct bond_marker *marker_info, 128 struct port *port); 129 static void ad_marker_response_received(struct bond_marker *marker, 130 struct port *port); 131 static void ad_update_actor_keys(struct port *port, bool reset); 132 133 134 /* ================= api to bonding and kernel code ================== */ 135 136 /** 137 * __get_bond_by_port - get the port's bonding struct 138 * @port: the port we're looking at 139 * 140 * Return @port's bonding struct, or %NULL if it can't be found. 141 */ 142 static inline struct bonding *__get_bond_by_port(struct port *port) 143 { 144 if (port->slave == NULL) 145 return NULL; 146 147 return bond_get_bond_by_slave(port->slave); 148 } 149 150 /** 151 * __get_first_agg - get the first aggregator in the bond 152 * @bond: the bond we're looking at 153 * 154 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 155 * found. 156 * The caller must hold RCU or RTNL lock. 157 */ 158 static inline struct aggregator *__get_first_agg(struct port *port) 159 { 160 struct bonding *bond = __get_bond_by_port(port); 161 struct slave *first_slave; 162 struct aggregator *agg; 163 164 /* If there's no bond for this port, or bond has no slaves */ 165 if (bond == NULL) 166 return NULL; 167 168 rcu_read_lock(); 169 first_slave = bond_first_slave_rcu(bond); 170 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 171 rcu_read_unlock(); 172 173 return agg; 174 } 175 176 /** 177 * __agg_has_partner - see if we have a partner 178 * @agg: the agregator we're looking at 179 * 180 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 181 * address for the partner). Return 0 if not. 182 */ 183 static inline int __agg_has_partner(struct aggregator *agg) 184 { 185 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 186 } 187 188 /** 189 * __disable_port - disable the port's slave 190 * @port: the port we're looking at 191 */ 192 static inline void __disable_port(struct port *port) 193 { 194 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 195 } 196 197 /** 198 * __enable_port - enable the port's slave, if it's up 199 * @port: the port we're looking at 200 */ 201 static inline void __enable_port(struct port *port) 202 { 203 struct slave *slave = port->slave; 204 205 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 206 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 207 } 208 209 /** 210 * __port_is_enabled - check if the port's slave is in active state 211 * @port: the port we're looking at 212 */ 213 static inline int __port_is_enabled(struct port *port) 214 { 215 return bond_is_active_slave(port->slave); 216 } 217 218 /** 219 * __get_agg_selection_mode - get the aggregator selection mode 220 * @port: the port we're looking at 221 * 222 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 223 */ 224 static inline u32 __get_agg_selection_mode(struct port *port) 225 { 226 struct bonding *bond = __get_bond_by_port(port); 227 228 if (bond == NULL) 229 return BOND_AD_STABLE; 230 231 return bond->params.ad_select; 232 } 233 234 /** 235 * __check_agg_selection_timer - check if the selection timer has expired 236 * @port: the port we're looking at 237 */ 238 static inline int __check_agg_selection_timer(struct port *port) 239 { 240 struct bonding *bond = __get_bond_by_port(port); 241 242 if (bond == NULL) 243 return 0; 244 245 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 246 } 247 248 /** 249 * __get_link_speed - get a port's speed 250 * @port: the port we're looking at 251 * 252 * Return @port's speed in 802.3ad enum format. i.e. one of: 253 * 0, 254 * %AD_LINK_SPEED_10MBPS, 255 * %AD_LINK_SPEED_100MBPS, 256 * %AD_LINK_SPEED_1000MBPS, 257 * %AD_LINK_SPEED_2500MBPS, 258 * %AD_LINK_SPEED_10000MBPS 259 * %AD_LINK_SPEED_20000MBPS 260 * %AD_LINK_SPEED_40000MBPS 261 * %AD_LINK_SPEED_56000MBPS 262 * %AD_LINK_SPEED_100000MBPS 263 */ 264 static u16 __get_link_speed(struct port *port) 265 { 266 struct slave *slave = port->slave; 267 u16 speed; 268 269 /* this if covers only a special case: when the configuration starts 270 * with link down, it sets the speed to 0. 271 * This is done in spite of the fact that the e100 driver reports 0 272 * to be compatible with MVT in the future. 273 */ 274 if (slave->link != BOND_LINK_UP) 275 speed = 0; 276 else { 277 switch (slave->speed) { 278 case SPEED_10: 279 speed = AD_LINK_SPEED_10MBPS; 280 break; 281 282 case SPEED_100: 283 speed = AD_LINK_SPEED_100MBPS; 284 break; 285 286 case SPEED_1000: 287 speed = AD_LINK_SPEED_1000MBPS; 288 break; 289 290 case SPEED_2500: 291 speed = AD_LINK_SPEED_2500MBPS; 292 break; 293 294 case SPEED_10000: 295 speed = AD_LINK_SPEED_10000MBPS; 296 break; 297 298 case SPEED_20000: 299 speed = AD_LINK_SPEED_20000MBPS; 300 break; 301 302 case SPEED_40000: 303 speed = AD_LINK_SPEED_40000MBPS; 304 break; 305 306 case SPEED_56000: 307 speed = AD_LINK_SPEED_56000MBPS; 308 break; 309 310 case SPEED_100000: 311 speed = AD_LINK_SPEED_100000MBPS; 312 break; 313 314 default: 315 /* unknown speed value from ethtool. shouldn't happen */ 316 speed = 0; 317 break; 318 } 319 } 320 321 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 322 port->actor_port_number, speed); 323 return speed; 324 } 325 326 /** 327 * __get_duplex - get a port's duplex 328 * @port: the port we're looking at 329 * 330 * Return @port's duplex in 802.3ad bitmask format. i.e.: 331 * 0x01 if in full duplex 332 * 0x00 otherwise 333 */ 334 static u8 __get_duplex(struct port *port) 335 { 336 struct slave *slave = port->slave; 337 u8 retval = 0x0; 338 339 /* handling a special case: when the configuration starts with 340 * link down, it sets the duplex to 0. 341 */ 342 if (slave->link == BOND_LINK_UP) { 343 switch (slave->duplex) { 344 case DUPLEX_FULL: 345 retval = 0x1; 346 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 347 port->actor_port_number); 348 break; 349 case DUPLEX_HALF: 350 default: 351 retval = 0x0; 352 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 353 port->actor_port_number); 354 break; 355 } 356 } 357 return retval; 358 } 359 360 static void __ad_actor_update_port(struct port *port) 361 { 362 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 363 364 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 365 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 366 } 367 368 /* Conversions */ 369 370 /** 371 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 372 * @timer_type: which timer to operate 373 * @par: timer parameter. see below 374 * 375 * If @timer_type is %current_while_timer, @par indicates long/short timer. 376 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 377 * %SLOW_PERIODIC_TIME. 378 */ 379 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 380 { 381 u16 retval = 0; /* to silence the compiler */ 382 383 switch (timer_type) { 384 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 385 if (par) 386 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 387 else 388 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 389 break; 390 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 391 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 392 break; 393 case AD_PERIODIC_TIMER: /* for periodic machine */ 394 retval = (par*ad_ticks_per_sec); /* long timeout */ 395 break; 396 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 397 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 398 break; 399 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 400 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 401 break; 402 } 403 404 return retval; 405 } 406 407 408 /* ================= ad_rx_machine helper functions ================== */ 409 410 /** 411 * __choose_matched - update a port's matched variable from a received lacpdu 412 * @lacpdu: the lacpdu we've received 413 * @port: the port we're looking at 414 * 415 * Update the value of the matched variable, using parameter values from a 416 * newly received lacpdu. Parameter values for the partner carried in the 417 * received PDU are compared with the corresponding operational parameter 418 * values for the actor. Matched is set to TRUE if all of these parameters 419 * match and the PDU parameter partner_state.aggregation has the same value as 420 * actor_oper_port_state.aggregation and lacp will actively maintain the link 421 * in the aggregation. Matched is also set to TRUE if the value of 422 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 423 * an individual link and lacp will actively maintain the link. Otherwise, 424 * matched is set to FALSE. LACP is considered to be actively maintaining the 425 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 426 * the actor's actor_oper_port_state.lacp_activity and the PDU's 427 * partner_state.lacp_activity variables are TRUE. 428 * 429 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 430 * used here to implement the language from 802.3ad 43.4.9 that requires 431 * recordPDU to "match" the LACPDU parameters to the stored values. 432 */ 433 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 434 { 435 /* check if all parameters are alike 436 * or this is individual link(aggregation == FALSE) 437 * then update the state machine Matched variable. 438 */ 439 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 440 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 441 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 442 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 443 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 444 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 445 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 446 ) { 447 port->sm_vars |= AD_PORT_MATCHED; 448 } else { 449 port->sm_vars &= ~AD_PORT_MATCHED; 450 } 451 } 452 453 /** 454 * __record_pdu - record parameters from a received lacpdu 455 * @lacpdu: the lacpdu we've received 456 * @port: the port we're looking at 457 * 458 * Record the parameter values for the Actor carried in a received lacpdu as 459 * the current partner operational parameter values and sets 460 * actor_oper_port_state.defaulted to FALSE. 461 */ 462 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 463 { 464 if (lacpdu && port) { 465 struct port_params *partner = &port->partner_oper; 466 467 __choose_matched(lacpdu, port); 468 /* record the new parameter values for the partner 469 * operational 470 */ 471 partner->port_number = ntohs(lacpdu->actor_port); 472 partner->port_priority = ntohs(lacpdu->actor_port_priority); 473 partner->system = lacpdu->actor_system; 474 partner->system_priority = ntohs(lacpdu->actor_system_priority); 475 partner->key = ntohs(lacpdu->actor_key); 476 partner->port_state = lacpdu->actor_state; 477 478 /* set actor_oper_port_state.defaulted to FALSE */ 479 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 480 481 /* set the partner sync. to on if the partner is sync, 482 * and the port is matched 483 */ 484 if ((port->sm_vars & AD_PORT_MATCHED) && 485 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 486 partner->port_state |= AD_STATE_SYNCHRONIZATION; 487 pr_debug("%s partner sync=1\n", port->slave->dev->name); 488 } else { 489 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 490 pr_debug("%s partner sync=0\n", port->slave->dev->name); 491 } 492 } 493 } 494 495 /** 496 * __record_default - record default parameters 497 * @port: the port we're looking at 498 * 499 * This function records the default parameter values for the partner carried 500 * in the Partner Admin parameters as the current partner operational parameter 501 * values and sets actor_oper_port_state.defaulted to TRUE. 502 */ 503 static void __record_default(struct port *port) 504 { 505 if (port) { 506 /* record the partner admin parameters */ 507 memcpy(&port->partner_oper, &port->partner_admin, 508 sizeof(struct port_params)); 509 510 /* set actor_oper_port_state.defaulted to true */ 511 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 512 } 513 } 514 515 /** 516 * __update_selected - update a port's Selected variable from a received lacpdu 517 * @lacpdu: the lacpdu we've received 518 * @port: the port we're looking at 519 * 520 * Update the value of the selected variable, using parameter values from a 521 * newly received lacpdu. The parameter values for the Actor carried in the 522 * received PDU are compared with the corresponding operational parameter 523 * values for the ports partner. If one or more of the comparisons shows that 524 * the value(s) received in the PDU differ from the current operational values, 525 * then selected is set to FALSE and actor_oper_port_state.synchronization is 526 * set to out_of_sync. Otherwise, selected remains unchanged. 527 */ 528 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 529 { 530 if (lacpdu && port) { 531 const struct port_params *partner = &port->partner_oper; 532 533 /* check if any parameter is different then 534 * update the state machine selected variable. 535 */ 536 if (ntohs(lacpdu->actor_port) != partner->port_number || 537 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 538 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 539 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 540 ntohs(lacpdu->actor_key) != partner->key || 541 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 542 port->sm_vars &= ~AD_PORT_SELECTED; 543 } 544 } 545 } 546 547 /** 548 * __update_default_selected - update a port's Selected variable from Partner 549 * @port: the port we're looking at 550 * 551 * This function updates the value of the selected variable, using the partner 552 * administrative parameter values. The administrative values are compared with 553 * the corresponding operational parameter values for the partner. If one or 554 * more of the comparisons shows that the administrative value(s) differ from 555 * the current operational values, then Selected is set to FALSE and 556 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 557 * Selected remains unchanged. 558 */ 559 static void __update_default_selected(struct port *port) 560 { 561 if (port) { 562 const struct port_params *admin = &port->partner_admin; 563 const struct port_params *oper = &port->partner_oper; 564 565 /* check if any parameter is different then 566 * update the state machine selected variable. 567 */ 568 if (admin->port_number != oper->port_number || 569 admin->port_priority != oper->port_priority || 570 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 571 admin->system_priority != oper->system_priority || 572 admin->key != oper->key || 573 (admin->port_state & AD_STATE_AGGREGATION) 574 != (oper->port_state & AD_STATE_AGGREGATION)) { 575 port->sm_vars &= ~AD_PORT_SELECTED; 576 } 577 } 578 } 579 580 /** 581 * __update_ntt - update a port's ntt variable from a received lacpdu 582 * @lacpdu: the lacpdu we've received 583 * @port: the port we're looking at 584 * 585 * Updates the value of the ntt variable, using parameter values from a newly 586 * received lacpdu. The parameter values for the partner carried in the 587 * received PDU are compared with the corresponding operational parameter 588 * values for the Actor. If one or more of the comparisons shows that the 589 * value(s) received in the PDU differ from the current operational values, 590 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 591 */ 592 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 593 { 594 /* validate lacpdu and port */ 595 if (lacpdu && port) { 596 /* check if any parameter is different then 597 * update the port->ntt. 598 */ 599 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 600 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 601 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 602 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 603 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 604 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 605 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 606 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 607 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 608 ) { 609 port->ntt = true; 610 } 611 } 612 } 613 614 /** 615 * __agg_ports_are_ready - check if all ports in an aggregator are ready 616 * @aggregator: the aggregator we're looking at 617 * 618 */ 619 static int __agg_ports_are_ready(struct aggregator *aggregator) 620 { 621 struct port *port; 622 int retval = 1; 623 624 if (aggregator) { 625 /* scan all ports in this aggregator to verfy if they are 626 * all ready. 627 */ 628 for (port = aggregator->lag_ports; 629 port; 630 port = port->next_port_in_aggregator) { 631 if (!(port->sm_vars & AD_PORT_READY_N)) { 632 retval = 0; 633 break; 634 } 635 } 636 } 637 638 return retval; 639 } 640 641 /** 642 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 643 * @aggregator: the aggregator we're looking at 644 * @val: Should the ports' ready bit be set on or off 645 * 646 */ 647 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 648 { 649 struct port *port; 650 651 for (port = aggregator->lag_ports; port; 652 port = port->next_port_in_aggregator) { 653 if (val) 654 port->sm_vars |= AD_PORT_READY; 655 else 656 port->sm_vars &= ~AD_PORT_READY; 657 } 658 } 659 660 static int __agg_active_ports(struct aggregator *agg) 661 { 662 struct port *port; 663 int active = 0; 664 665 for (port = agg->lag_ports; port; 666 port = port->next_port_in_aggregator) { 667 if (port->is_enabled) 668 active++; 669 } 670 671 return active; 672 } 673 674 /** 675 * __get_agg_bandwidth - get the total bandwidth of an aggregator 676 * @aggregator: the aggregator we're looking at 677 * 678 */ 679 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 680 { 681 int nports = __agg_active_ports(aggregator); 682 u32 bandwidth = 0; 683 684 if (nports) { 685 switch (__get_link_speed(aggregator->lag_ports)) { 686 case AD_LINK_SPEED_1MBPS: 687 bandwidth = nports; 688 break; 689 case AD_LINK_SPEED_10MBPS: 690 bandwidth = nports * 10; 691 break; 692 case AD_LINK_SPEED_100MBPS: 693 bandwidth = nports * 100; 694 break; 695 case AD_LINK_SPEED_1000MBPS: 696 bandwidth = nports * 1000; 697 break; 698 case AD_LINK_SPEED_2500MBPS: 699 bandwidth = nports * 2500; 700 break; 701 case AD_LINK_SPEED_10000MBPS: 702 bandwidth = nports * 10000; 703 break; 704 case AD_LINK_SPEED_20000MBPS: 705 bandwidth = nports * 20000; 706 break; 707 case AD_LINK_SPEED_40000MBPS: 708 bandwidth = nports * 40000; 709 break; 710 case AD_LINK_SPEED_56000MBPS: 711 bandwidth = nports * 56000; 712 break; 713 case AD_LINK_SPEED_100000MBPS: 714 bandwidth = nports * 100000; 715 break; 716 default: 717 bandwidth = 0; /* to silence the compiler */ 718 } 719 } 720 return bandwidth; 721 } 722 723 /** 724 * __get_active_agg - get the current active aggregator 725 * @aggregator: the aggregator we're looking at 726 * 727 * Caller must hold RCU lock. 728 */ 729 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 730 { 731 struct bonding *bond = aggregator->slave->bond; 732 struct list_head *iter; 733 struct slave *slave; 734 735 bond_for_each_slave_rcu(bond, slave, iter) 736 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 737 return &(SLAVE_AD_INFO(slave)->aggregator); 738 739 return NULL; 740 } 741 742 /** 743 * __update_lacpdu_from_port - update a port's lacpdu fields 744 * @port: the port we're looking at 745 */ 746 static inline void __update_lacpdu_from_port(struct port *port) 747 { 748 struct lacpdu *lacpdu = &port->lacpdu; 749 const struct port_params *partner = &port->partner_oper; 750 751 /* update current actual Actor parameters 752 * lacpdu->subtype initialized 753 * lacpdu->version_number initialized 754 * lacpdu->tlv_type_actor_info initialized 755 * lacpdu->actor_information_length initialized 756 */ 757 758 lacpdu->actor_system_priority = htons(port->actor_system_priority); 759 lacpdu->actor_system = port->actor_system; 760 lacpdu->actor_key = htons(port->actor_oper_port_key); 761 lacpdu->actor_port_priority = htons(port->actor_port_priority); 762 lacpdu->actor_port = htons(port->actor_port_number); 763 lacpdu->actor_state = port->actor_oper_port_state; 764 pr_debug("update lacpdu: %s, actor port state %x\n", 765 port->slave->dev->name, port->actor_oper_port_state); 766 767 /* lacpdu->reserved_3_1 initialized 768 * lacpdu->tlv_type_partner_info initialized 769 * lacpdu->partner_information_length initialized 770 */ 771 772 lacpdu->partner_system_priority = htons(partner->system_priority); 773 lacpdu->partner_system = partner->system; 774 lacpdu->partner_key = htons(partner->key); 775 lacpdu->partner_port_priority = htons(partner->port_priority); 776 lacpdu->partner_port = htons(partner->port_number); 777 lacpdu->partner_state = partner->port_state; 778 779 /* lacpdu->reserved_3_2 initialized 780 * lacpdu->tlv_type_collector_info initialized 781 * lacpdu->collector_information_length initialized 782 * collector_max_delay initialized 783 * reserved_12[12] initialized 784 * tlv_type_terminator initialized 785 * terminator_length initialized 786 * reserved_50[50] initialized 787 */ 788 } 789 790 /* ================= main 802.3ad protocol code ========================= */ 791 792 /** 793 * ad_lacpdu_send - send out a lacpdu packet on a given port 794 * @port: the port we're looking at 795 * 796 * Returns: 0 on success 797 * < 0 on error 798 */ 799 static int ad_lacpdu_send(struct port *port) 800 { 801 struct slave *slave = port->slave; 802 struct sk_buff *skb; 803 struct lacpdu_header *lacpdu_header; 804 int length = sizeof(struct lacpdu_header); 805 806 skb = dev_alloc_skb(length); 807 if (!skb) 808 return -ENOMEM; 809 810 skb->dev = slave->dev; 811 skb_reset_mac_header(skb); 812 skb->network_header = skb->mac_header + ETH_HLEN; 813 skb->protocol = PKT_TYPE_LACPDU; 814 skb->priority = TC_PRIO_CONTROL; 815 816 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 817 818 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 819 /* Note: source address is set to be the member's PERMANENT address, 820 * because we use it to identify loopback lacpdus in receive. 821 */ 822 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 823 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 824 825 lacpdu_header->lacpdu = port->lacpdu; 826 827 dev_queue_xmit(skb); 828 829 return 0; 830 } 831 832 /** 833 * ad_marker_send - send marker information/response on a given port 834 * @port: the port we're looking at 835 * @marker: marker data to send 836 * 837 * Returns: 0 on success 838 * < 0 on error 839 */ 840 static int ad_marker_send(struct port *port, struct bond_marker *marker) 841 { 842 struct slave *slave = port->slave; 843 struct sk_buff *skb; 844 struct bond_marker_header *marker_header; 845 int length = sizeof(struct bond_marker_header); 846 847 skb = dev_alloc_skb(length + 16); 848 if (!skb) 849 return -ENOMEM; 850 851 skb_reserve(skb, 16); 852 853 skb->dev = slave->dev; 854 skb_reset_mac_header(skb); 855 skb->network_header = skb->mac_header + ETH_HLEN; 856 skb->protocol = PKT_TYPE_LACPDU; 857 858 marker_header = (struct bond_marker_header *)skb_put(skb, length); 859 860 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 861 /* Note: source address is set to be the member's PERMANENT address, 862 * because we use it to identify loopback MARKERs in receive. 863 */ 864 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 865 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 866 867 marker_header->marker = *marker; 868 869 dev_queue_xmit(skb); 870 871 return 0; 872 } 873 874 /** 875 * ad_mux_machine - handle a port's mux state machine 876 * @port: the port we're looking at 877 * @update_slave_arr: Does slave array need update? 878 */ 879 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 880 { 881 mux_states_t last_state; 882 883 /* keep current State Machine state to compare later if it was 884 * changed 885 */ 886 last_state = port->sm_mux_state; 887 888 if (port->sm_vars & AD_PORT_BEGIN) { 889 port->sm_mux_state = AD_MUX_DETACHED; 890 } else { 891 switch (port->sm_mux_state) { 892 case AD_MUX_DETACHED: 893 if ((port->sm_vars & AD_PORT_SELECTED) 894 || (port->sm_vars & AD_PORT_STANDBY)) 895 /* if SELECTED or STANDBY */ 896 port->sm_mux_state = AD_MUX_WAITING; 897 break; 898 case AD_MUX_WAITING: 899 /* if SELECTED == FALSE return to DETACH state */ 900 if (!(port->sm_vars & AD_PORT_SELECTED)) { 901 port->sm_vars &= ~AD_PORT_READY_N; 902 /* in order to withhold the Selection Logic to 903 * check all ports READY_N value every callback 904 * cycle to update ready variable, we check 905 * READY_N and update READY here 906 */ 907 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 908 port->sm_mux_state = AD_MUX_DETACHED; 909 break; 910 } 911 912 /* check if the wait_while_timer expired */ 913 if (port->sm_mux_timer_counter 914 && !(--port->sm_mux_timer_counter)) 915 port->sm_vars |= AD_PORT_READY_N; 916 917 /* in order to withhold the selection logic to check 918 * all ports READY_N value every callback cycle to 919 * update ready variable, we check READY_N and update 920 * READY here 921 */ 922 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 923 924 /* if the wait_while_timer expired, and the port is 925 * in READY state, move to ATTACHED state 926 */ 927 if ((port->sm_vars & AD_PORT_READY) 928 && !port->sm_mux_timer_counter) 929 port->sm_mux_state = AD_MUX_ATTACHED; 930 break; 931 case AD_MUX_ATTACHED: 932 /* check also if agg_select_timer expired (so the 933 * edable port will take place only after this timer) 934 */ 935 if ((port->sm_vars & AD_PORT_SELECTED) && 936 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 937 !__check_agg_selection_timer(port)) { 938 if (port->aggregator->is_active) 939 port->sm_mux_state = 940 AD_MUX_COLLECTING_DISTRIBUTING; 941 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 942 (port->sm_vars & AD_PORT_STANDBY)) { 943 /* if UNSELECTED or STANDBY */ 944 port->sm_vars &= ~AD_PORT_READY_N; 945 /* in order to withhold the selection logic to 946 * check all ports READY_N value every callback 947 * cycle to update ready variable, we check 948 * READY_N and update READY here 949 */ 950 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 951 port->sm_mux_state = AD_MUX_DETACHED; 952 } else if (port->aggregator->is_active) { 953 port->actor_oper_port_state |= 954 AD_STATE_SYNCHRONIZATION; 955 } 956 break; 957 case AD_MUX_COLLECTING_DISTRIBUTING: 958 if (!(port->sm_vars & AD_PORT_SELECTED) || 959 (port->sm_vars & AD_PORT_STANDBY) || 960 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 961 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 962 port->sm_mux_state = AD_MUX_ATTACHED; 963 } else { 964 /* if port state hasn't changed make 965 * sure that a collecting distributing 966 * port in an active aggregator is enabled 967 */ 968 if (port->aggregator && 969 port->aggregator->is_active && 970 !__port_is_enabled(port)) { 971 972 __enable_port(port); 973 } 974 } 975 break; 976 default: 977 break; 978 } 979 } 980 981 /* check if the state machine was changed */ 982 if (port->sm_mux_state != last_state) { 983 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 984 port->actor_port_number, 985 port->slave->dev->name, 986 last_state, 987 port->sm_mux_state); 988 switch (port->sm_mux_state) { 989 case AD_MUX_DETACHED: 990 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 991 ad_disable_collecting_distributing(port, 992 update_slave_arr); 993 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 994 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 995 port->ntt = true; 996 break; 997 case AD_MUX_WAITING: 998 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 999 break; 1000 case AD_MUX_ATTACHED: 1001 if (port->aggregator->is_active) 1002 port->actor_oper_port_state |= 1003 AD_STATE_SYNCHRONIZATION; 1004 else 1005 port->actor_oper_port_state &= 1006 ~AD_STATE_SYNCHRONIZATION; 1007 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1008 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1009 ad_disable_collecting_distributing(port, 1010 update_slave_arr); 1011 port->ntt = true; 1012 break; 1013 case AD_MUX_COLLECTING_DISTRIBUTING: 1014 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1015 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1016 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1017 ad_enable_collecting_distributing(port, 1018 update_slave_arr); 1019 port->ntt = true; 1020 break; 1021 default: 1022 break; 1023 } 1024 } 1025 } 1026 1027 /** 1028 * ad_rx_machine - handle a port's rx State Machine 1029 * @lacpdu: the lacpdu we've received 1030 * @port: the port we're looking at 1031 * 1032 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1033 * CURRENT. If timer expired set the state machine in the proper state. 1034 * In other cases, this function checks if we need to switch to other state. 1035 */ 1036 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1037 { 1038 rx_states_t last_state; 1039 1040 /* keep current State Machine state to compare later if it was 1041 * changed 1042 */ 1043 last_state = port->sm_rx_state; 1044 1045 /* check if state machine should change state */ 1046 1047 /* first, check if port was reinitialized */ 1048 if (port->sm_vars & AD_PORT_BEGIN) { 1049 port->sm_rx_state = AD_RX_INITIALIZE; 1050 port->sm_vars |= AD_PORT_CHURNED; 1051 /* check if port is not enabled */ 1052 } else if (!(port->sm_vars & AD_PORT_BEGIN) 1053 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 1054 port->sm_rx_state = AD_RX_PORT_DISABLED; 1055 /* check if new lacpdu arrived */ 1056 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1057 (port->sm_rx_state == AD_RX_DEFAULTED) || 1058 (port->sm_rx_state == AD_RX_CURRENT))) { 1059 if (port->sm_rx_state != AD_RX_CURRENT) 1060 port->sm_vars |= AD_PORT_CHURNED; 1061 port->sm_rx_timer_counter = 0; 1062 port->sm_rx_state = AD_RX_CURRENT; 1063 } else { 1064 /* if timer is on, and if it is expired */ 1065 if (port->sm_rx_timer_counter && 1066 !(--port->sm_rx_timer_counter)) { 1067 switch (port->sm_rx_state) { 1068 case AD_RX_EXPIRED: 1069 port->sm_rx_state = AD_RX_DEFAULTED; 1070 break; 1071 case AD_RX_CURRENT: 1072 port->sm_rx_state = AD_RX_EXPIRED; 1073 break; 1074 default: 1075 break; 1076 } 1077 } else { 1078 /* if no lacpdu arrived and no timer is on */ 1079 switch (port->sm_rx_state) { 1080 case AD_RX_PORT_DISABLED: 1081 if (port->sm_vars & AD_PORT_MOVED) 1082 port->sm_rx_state = AD_RX_INITIALIZE; 1083 else if (port->is_enabled 1084 && (port->sm_vars 1085 & AD_PORT_LACP_ENABLED)) 1086 port->sm_rx_state = AD_RX_EXPIRED; 1087 else if (port->is_enabled 1088 && ((port->sm_vars 1089 & AD_PORT_LACP_ENABLED) == 0)) 1090 port->sm_rx_state = AD_RX_LACP_DISABLED; 1091 break; 1092 default: 1093 break; 1094 1095 } 1096 } 1097 } 1098 1099 /* check if the State machine was changed or new lacpdu arrived */ 1100 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1101 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1102 port->actor_port_number, 1103 port->slave->dev->name, 1104 last_state, 1105 port->sm_rx_state); 1106 switch (port->sm_rx_state) { 1107 case AD_RX_INITIALIZE: 1108 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1109 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1110 else 1111 port->sm_vars |= AD_PORT_LACP_ENABLED; 1112 port->sm_vars &= ~AD_PORT_SELECTED; 1113 __record_default(port); 1114 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1115 port->sm_vars &= ~AD_PORT_MOVED; 1116 port->sm_rx_state = AD_RX_PORT_DISABLED; 1117 1118 /* Fall Through */ 1119 case AD_RX_PORT_DISABLED: 1120 port->sm_vars &= ~AD_PORT_MATCHED; 1121 break; 1122 case AD_RX_LACP_DISABLED: 1123 port->sm_vars &= ~AD_PORT_SELECTED; 1124 __record_default(port); 1125 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1126 port->sm_vars |= AD_PORT_MATCHED; 1127 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1128 break; 1129 case AD_RX_EXPIRED: 1130 /* Reset of the Synchronization flag (Standard 43.4.12) 1131 * This reset cause to disable this port in the 1132 * COLLECTING_DISTRIBUTING state of the mux machine in 1133 * case of EXPIRED even if LINK_DOWN didn't arrive for 1134 * the port. 1135 */ 1136 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1137 port->sm_vars &= ~AD_PORT_MATCHED; 1138 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1139 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1140 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1141 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1142 port->sm_vars |= AD_PORT_CHURNED; 1143 break; 1144 case AD_RX_DEFAULTED: 1145 __update_default_selected(port); 1146 __record_default(port); 1147 port->sm_vars |= AD_PORT_MATCHED; 1148 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1149 break; 1150 case AD_RX_CURRENT: 1151 /* detect loopback situation */ 1152 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1153 &(port->actor_system))) { 1154 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1155 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1156 port->slave->dev->name); 1157 return; 1158 } 1159 __update_selected(lacpdu, port); 1160 __update_ntt(lacpdu, port); 1161 __record_pdu(lacpdu, port); 1162 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1163 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1164 break; 1165 default: 1166 break; 1167 } 1168 } 1169 } 1170 1171 /** 1172 * ad_churn_machine - handle port churn's state machine 1173 * @port: the port we're looking at 1174 * 1175 */ 1176 static void ad_churn_machine(struct port *port) 1177 { 1178 if (port->sm_vars & AD_PORT_CHURNED) { 1179 port->sm_vars &= ~AD_PORT_CHURNED; 1180 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1181 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1182 port->sm_churn_actor_timer_counter = 1183 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1184 port->sm_churn_partner_timer_counter = 1185 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1186 return; 1187 } 1188 if (port->sm_churn_actor_timer_counter && 1189 !(--port->sm_churn_actor_timer_counter) && 1190 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1191 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1192 port->sm_churn_actor_state = AD_NO_CHURN; 1193 } else { 1194 port->churn_actor_count++; 1195 port->sm_churn_actor_state = AD_CHURN; 1196 } 1197 } 1198 if (port->sm_churn_partner_timer_counter && 1199 !(--port->sm_churn_partner_timer_counter) && 1200 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1201 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1202 port->sm_churn_partner_state = AD_NO_CHURN; 1203 } else { 1204 port->churn_partner_count++; 1205 port->sm_churn_partner_state = AD_CHURN; 1206 } 1207 } 1208 } 1209 1210 /** 1211 * ad_tx_machine - handle a port's tx state machine 1212 * @port: the port we're looking at 1213 */ 1214 static void ad_tx_machine(struct port *port) 1215 { 1216 /* check if tx timer expired, to verify that we do not send more than 1217 * 3 packets per second 1218 */ 1219 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1220 /* check if there is something to send */ 1221 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1222 __update_lacpdu_from_port(port); 1223 1224 if (ad_lacpdu_send(port) >= 0) { 1225 pr_debug("Sent LACPDU on port %d\n", 1226 port->actor_port_number); 1227 1228 /* mark ntt as false, so it will not be sent 1229 * again until demanded 1230 */ 1231 port->ntt = false; 1232 } 1233 } 1234 /* restart tx timer(to verify that we will not exceed 1235 * AD_MAX_TX_IN_SECOND 1236 */ 1237 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1238 } 1239 } 1240 1241 /** 1242 * ad_periodic_machine - handle a port's periodic state machine 1243 * @port: the port we're looking at 1244 * 1245 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1246 */ 1247 static void ad_periodic_machine(struct port *port) 1248 { 1249 periodic_states_t last_state; 1250 1251 /* keep current state machine state to compare later if it was changed */ 1252 last_state = port->sm_periodic_state; 1253 1254 /* check if port was reinitialized */ 1255 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1256 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1257 ) { 1258 port->sm_periodic_state = AD_NO_PERIODIC; 1259 } 1260 /* check if state machine should change state */ 1261 else if (port->sm_periodic_timer_counter) { 1262 /* check if periodic state machine expired */ 1263 if (!(--port->sm_periodic_timer_counter)) { 1264 /* if expired then do tx */ 1265 port->sm_periodic_state = AD_PERIODIC_TX; 1266 } else { 1267 /* If not expired, check if there is some new timeout 1268 * parameter from the partner state 1269 */ 1270 switch (port->sm_periodic_state) { 1271 case AD_FAST_PERIODIC: 1272 if (!(port->partner_oper.port_state 1273 & AD_STATE_LACP_TIMEOUT)) 1274 port->sm_periodic_state = AD_SLOW_PERIODIC; 1275 break; 1276 case AD_SLOW_PERIODIC: 1277 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1278 port->sm_periodic_timer_counter = 0; 1279 port->sm_periodic_state = AD_PERIODIC_TX; 1280 } 1281 break; 1282 default: 1283 break; 1284 } 1285 } 1286 } else { 1287 switch (port->sm_periodic_state) { 1288 case AD_NO_PERIODIC: 1289 port->sm_periodic_state = AD_FAST_PERIODIC; 1290 break; 1291 case AD_PERIODIC_TX: 1292 if (!(port->partner_oper.port_state & 1293 AD_STATE_LACP_TIMEOUT)) 1294 port->sm_periodic_state = AD_SLOW_PERIODIC; 1295 else 1296 port->sm_periodic_state = AD_FAST_PERIODIC; 1297 break; 1298 default: 1299 break; 1300 } 1301 } 1302 1303 /* check if the state machine was changed */ 1304 if (port->sm_periodic_state != last_state) { 1305 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1306 port->actor_port_number, last_state, 1307 port->sm_periodic_state); 1308 switch (port->sm_periodic_state) { 1309 case AD_NO_PERIODIC: 1310 port->sm_periodic_timer_counter = 0; 1311 break; 1312 case AD_FAST_PERIODIC: 1313 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1314 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1315 break; 1316 case AD_SLOW_PERIODIC: 1317 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1318 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1319 break; 1320 case AD_PERIODIC_TX: 1321 port->ntt = true; 1322 break; 1323 default: 1324 break; 1325 } 1326 } 1327 } 1328 1329 /** 1330 * ad_port_selection_logic - select aggregation groups 1331 * @port: the port we're looking at 1332 * @update_slave_arr: Does slave array need update? 1333 * 1334 * Select aggregation groups, and assign each port for it's aggregetor. The 1335 * selection logic is called in the inititalization (after all the handshkes), 1336 * and after every lacpdu receive (if selected is off). 1337 */ 1338 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1339 { 1340 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1341 struct port *last_port = NULL, *curr_port; 1342 struct list_head *iter; 1343 struct bonding *bond; 1344 struct slave *slave; 1345 int found = 0; 1346 1347 /* if the port is already Selected, do nothing */ 1348 if (port->sm_vars & AD_PORT_SELECTED) 1349 return; 1350 1351 bond = __get_bond_by_port(port); 1352 1353 /* if the port is connected to other aggregator, detach it */ 1354 if (port->aggregator) { 1355 /* detach the port from its former aggregator */ 1356 temp_aggregator = port->aggregator; 1357 for (curr_port = temp_aggregator->lag_ports; curr_port; 1358 last_port = curr_port, 1359 curr_port = curr_port->next_port_in_aggregator) { 1360 if (curr_port == port) { 1361 temp_aggregator->num_of_ports--; 1362 /* if it is the first port attached to the 1363 * aggregator 1364 */ 1365 if (!last_port) { 1366 temp_aggregator->lag_ports = 1367 port->next_port_in_aggregator; 1368 } else { 1369 /* not the first port attached to the 1370 * aggregator 1371 */ 1372 last_port->next_port_in_aggregator = 1373 port->next_port_in_aggregator; 1374 } 1375 1376 /* clear the port's relations to this 1377 * aggregator 1378 */ 1379 port->aggregator = NULL; 1380 port->next_port_in_aggregator = NULL; 1381 port->actor_port_aggregator_identifier = 0; 1382 1383 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1384 port->actor_port_number, 1385 temp_aggregator->aggregator_identifier); 1386 /* if the aggregator is empty, clear its 1387 * parameters, and set it ready to be attached 1388 */ 1389 if (!temp_aggregator->lag_ports) 1390 ad_clear_agg(temp_aggregator); 1391 break; 1392 } 1393 } 1394 if (!curr_port) { 1395 /* meaning: the port was related to an aggregator 1396 * but was not on the aggregator port list 1397 */ 1398 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1399 port->slave->bond->dev->name, 1400 port->actor_port_number, 1401 port->slave->dev->name, 1402 port->aggregator->aggregator_identifier); 1403 } 1404 } 1405 /* search on all aggregators for a suitable aggregator for this port */ 1406 bond_for_each_slave(bond, slave, iter) { 1407 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1408 1409 /* keep a free aggregator for later use(if needed) */ 1410 if (!aggregator->lag_ports) { 1411 if (!free_aggregator) 1412 free_aggregator = aggregator; 1413 continue; 1414 } 1415 /* check if current aggregator suits us */ 1416 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1417 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1418 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1419 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1420 ) && 1421 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1422 !aggregator->is_individual) /* but is not individual OR */ 1423 ) 1424 ) { 1425 /* attach to the founded aggregator */ 1426 port->aggregator = aggregator; 1427 port->actor_port_aggregator_identifier = 1428 port->aggregator->aggregator_identifier; 1429 port->next_port_in_aggregator = aggregator->lag_ports; 1430 port->aggregator->num_of_ports++; 1431 aggregator->lag_ports = port; 1432 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1433 port->actor_port_number, 1434 port->aggregator->aggregator_identifier); 1435 1436 /* mark this port as selected */ 1437 port->sm_vars |= AD_PORT_SELECTED; 1438 found = 1; 1439 break; 1440 } 1441 } 1442 1443 /* the port couldn't find an aggregator - attach it to a new 1444 * aggregator 1445 */ 1446 if (!found) { 1447 if (free_aggregator) { 1448 /* assign port a new aggregator */ 1449 port->aggregator = free_aggregator; 1450 port->actor_port_aggregator_identifier = 1451 port->aggregator->aggregator_identifier; 1452 1453 /* update the new aggregator's parameters 1454 * if port was responsed from the end-user 1455 */ 1456 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1457 /* if port is full duplex */ 1458 port->aggregator->is_individual = false; 1459 else 1460 port->aggregator->is_individual = true; 1461 1462 port->aggregator->actor_admin_aggregator_key = 1463 port->actor_admin_port_key; 1464 port->aggregator->actor_oper_aggregator_key = 1465 port->actor_oper_port_key; 1466 port->aggregator->partner_system = 1467 port->partner_oper.system; 1468 port->aggregator->partner_system_priority = 1469 port->partner_oper.system_priority; 1470 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1471 port->aggregator->receive_state = 1; 1472 port->aggregator->transmit_state = 1; 1473 port->aggregator->lag_ports = port; 1474 port->aggregator->num_of_ports++; 1475 1476 /* mark this port as selected */ 1477 port->sm_vars |= AD_PORT_SELECTED; 1478 1479 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1480 port->actor_port_number, 1481 port->aggregator->aggregator_identifier); 1482 } else { 1483 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1484 port->actor_port_number, port->slave->dev->name); 1485 } 1486 } 1487 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1488 * in all aggregator's ports, else set ready=FALSE in all 1489 * aggregator's ports 1490 */ 1491 __set_agg_ports_ready(port->aggregator, 1492 __agg_ports_are_ready(port->aggregator)); 1493 1494 aggregator = __get_first_agg(port); 1495 ad_agg_selection_logic(aggregator, update_slave_arr); 1496 1497 if (!port->aggregator->is_active) 1498 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1499 } 1500 1501 /* Decide if "agg" is a better choice for the new active aggregator that 1502 * the current best, according to the ad_select policy. 1503 */ 1504 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1505 struct aggregator *curr) 1506 { 1507 /* 0. If no best, select current. 1508 * 1509 * 1. If the current agg is not individual, and the best is 1510 * individual, select current. 1511 * 1512 * 2. If current agg is individual and the best is not, keep best. 1513 * 1514 * 3. Therefore, current and best are both individual or both not 1515 * individual, so: 1516 * 1517 * 3a. If current agg partner replied, and best agg partner did not, 1518 * select current. 1519 * 1520 * 3b. If current agg partner did not reply and best agg partner 1521 * did reply, keep best. 1522 * 1523 * 4. Therefore, current and best both have partner replies or 1524 * both do not, so perform selection policy: 1525 * 1526 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1527 * select by bandwidth. 1528 * 1529 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1530 */ 1531 if (!best) 1532 return curr; 1533 1534 if (!curr->is_individual && best->is_individual) 1535 return curr; 1536 1537 if (curr->is_individual && !best->is_individual) 1538 return best; 1539 1540 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1541 return curr; 1542 1543 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1544 return best; 1545 1546 switch (__get_agg_selection_mode(curr->lag_ports)) { 1547 case BOND_AD_COUNT: 1548 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1549 return curr; 1550 1551 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1552 return best; 1553 1554 /*FALLTHROUGH*/ 1555 case BOND_AD_STABLE: 1556 case BOND_AD_BANDWIDTH: 1557 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1558 return curr; 1559 1560 break; 1561 1562 default: 1563 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1564 curr->slave->bond->dev->name, 1565 __get_agg_selection_mode(curr->lag_ports)); 1566 break; 1567 } 1568 1569 return best; 1570 } 1571 1572 static int agg_device_up(const struct aggregator *agg) 1573 { 1574 struct port *port = agg->lag_ports; 1575 1576 if (!port) 1577 return 0; 1578 1579 for (port = agg->lag_ports; port; 1580 port = port->next_port_in_aggregator) { 1581 if (netif_running(port->slave->dev) && 1582 netif_carrier_ok(port->slave->dev)) 1583 return 1; 1584 } 1585 1586 return 0; 1587 } 1588 1589 /** 1590 * ad_agg_selection_logic - select an aggregation group for a team 1591 * @aggregator: the aggregator we're looking at 1592 * @update_slave_arr: Does slave array need update? 1593 * 1594 * It is assumed that only one aggregator may be selected for a team. 1595 * 1596 * The logic of this function is to select the aggregator according to 1597 * the ad_select policy: 1598 * 1599 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1600 * it, and to reselect the active aggregator only if the previous 1601 * aggregator has no more ports related to it. 1602 * 1603 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1604 * bandwidth, and reselect whenever a link state change takes place or the 1605 * set of slaves in the bond changes. 1606 * 1607 * BOND_AD_COUNT: select the aggregator with largest number of ports 1608 * (slaves), and reselect whenever a link state change takes place or the 1609 * set of slaves in the bond changes. 1610 * 1611 * FIXME: this function MUST be called with the first agg in the bond, or 1612 * __get_active_agg() won't work correctly. This function should be better 1613 * called with the bond itself, and retrieve the first agg from it. 1614 */ 1615 static void ad_agg_selection_logic(struct aggregator *agg, 1616 bool *update_slave_arr) 1617 { 1618 struct aggregator *best, *active, *origin; 1619 struct bonding *bond = agg->slave->bond; 1620 struct list_head *iter; 1621 struct slave *slave; 1622 struct port *port; 1623 1624 rcu_read_lock(); 1625 origin = agg; 1626 active = __get_active_agg(agg); 1627 best = (active && agg_device_up(active)) ? active : NULL; 1628 1629 bond_for_each_slave_rcu(bond, slave, iter) { 1630 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1631 1632 agg->is_active = 0; 1633 1634 if (__agg_active_ports(agg) && agg_device_up(agg)) 1635 best = ad_agg_selection_test(best, agg); 1636 } 1637 1638 if (best && 1639 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1640 /* For the STABLE policy, don't replace the old active 1641 * aggregator if it's still active (it has an answering 1642 * partner) or if both the best and active don't have an 1643 * answering partner. 1644 */ 1645 if (active && active->lag_ports && 1646 __agg_active_ports(active) && 1647 (__agg_has_partner(active) || 1648 (!__agg_has_partner(active) && 1649 !__agg_has_partner(best)))) { 1650 if (!(!active->actor_oper_aggregator_key && 1651 best->actor_oper_aggregator_key)) { 1652 best = NULL; 1653 active->is_active = 1; 1654 } 1655 } 1656 } 1657 1658 if (best && (best == active)) { 1659 best = NULL; 1660 active->is_active = 1; 1661 } 1662 1663 /* if there is new best aggregator, activate it */ 1664 if (best) { 1665 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1666 best->aggregator_identifier, best->num_of_ports, 1667 best->actor_oper_aggregator_key, 1668 best->partner_oper_aggregator_key, 1669 best->is_individual, best->is_active); 1670 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1671 best->lag_ports, best->slave, 1672 best->slave ? best->slave->dev->name : "NULL"); 1673 1674 bond_for_each_slave_rcu(bond, slave, iter) { 1675 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1676 1677 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1678 agg->aggregator_identifier, agg->num_of_ports, 1679 agg->actor_oper_aggregator_key, 1680 agg->partner_oper_aggregator_key, 1681 agg->is_individual, agg->is_active); 1682 } 1683 1684 /* check if any partner replys */ 1685 if (best->is_individual) { 1686 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1687 best->slave ? 1688 best->slave->bond->dev->name : "NULL"); 1689 } 1690 1691 best->is_active = 1; 1692 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1693 best->aggregator_identifier); 1694 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1695 best->aggregator_identifier, best->num_of_ports, 1696 best->actor_oper_aggregator_key, 1697 best->partner_oper_aggregator_key, 1698 best->is_individual, best->is_active); 1699 1700 /* disable the ports that were related to the former 1701 * active_aggregator 1702 */ 1703 if (active) { 1704 for (port = active->lag_ports; port; 1705 port = port->next_port_in_aggregator) { 1706 __disable_port(port); 1707 } 1708 } 1709 /* Slave array needs update. */ 1710 *update_slave_arr = true; 1711 } 1712 1713 /* if the selected aggregator is of join individuals 1714 * (partner_system is NULL), enable their ports 1715 */ 1716 active = __get_active_agg(origin); 1717 1718 if (active) { 1719 if (!__agg_has_partner(active)) { 1720 for (port = active->lag_ports; port; 1721 port = port->next_port_in_aggregator) { 1722 __enable_port(port); 1723 } 1724 } 1725 } 1726 1727 rcu_read_unlock(); 1728 1729 bond_3ad_set_carrier(bond); 1730 } 1731 1732 /** 1733 * ad_clear_agg - clear a given aggregator's parameters 1734 * @aggregator: the aggregator we're looking at 1735 */ 1736 static void ad_clear_agg(struct aggregator *aggregator) 1737 { 1738 if (aggregator) { 1739 aggregator->is_individual = false; 1740 aggregator->actor_admin_aggregator_key = 0; 1741 aggregator->actor_oper_aggregator_key = 0; 1742 aggregator->partner_system = null_mac_addr; 1743 aggregator->partner_system_priority = 0; 1744 aggregator->partner_oper_aggregator_key = 0; 1745 aggregator->receive_state = 0; 1746 aggregator->transmit_state = 0; 1747 aggregator->lag_ports = NULL; 1748 aggregator->is_active = 0; 1749 aggregator->num_of_ports = 0; 1750 pr_debug("LAG %d was cleared\n", 1751 aggregator->aggregator_identifier); 1752 } 1753 } 1754 1755 /** 1756 * ad_initialize_agg - initialize a given aggregator's parameters 1757 * @aggregator: the aggregator we're looking at 1758 */ 1759 static void ad_initialize_agg(struct aggregator *aggregator) 1760 { 1761 if (aggregator) { 1762 ad_clear_agg(aggregator); 1763 1764 aggregator->aggregator_mac_address = null_mac_addr; 1765 aggregator->aggregator_identifier = 0; 1766 aggregator->slave = NULL; 1767 } 1768 } 1769 1770 /** 1771 * ad_initialize_port - initialize a given port's parameters 1772 * @aggregator: the aggregator we're looking at 1773 * @lacp_fast: boolean. whether fast periodic should be used 1774 */ 1775 static void ad_initialize_port(struct port *port, int lacp_fast) 1776 { 1777 static const struct port_params tmpl = { 1778 .system_priority = 0xffff, 1779 .key = 1, 1780 .port_number = 1, 1781 .port_priority = 0xff, 1782 .port_state = 1, 1783 }; 1784 static const struct lacpdu lacpdu = { 1785 .subtype = 0x01, 1786 .version_number = 0x01, 1787 .tlv_type_actor_info = 0x01, 1788 .actor_information_length = 0x14, 1789 .tlv_type_partner_info = 0x02, 1790 .partner_information_length = 0x14, 1791 .tlv_type_collector_info = 0x03, 1792 .collector_information_length = 0x10, 1793 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1794 }; 1795 1796 if (port) { 1797 port->actor_port_priority = 0xff; 1798 port->actor_port_aggregator_identifier = 0; 1799 port->ntt = false; 1800 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1801 AD_STATE_LACP_ACTIVITY; 1802 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1803 AD_STATE_LACP_ACTIVITY; 1804 1805 if (lacp_fast) 1806 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1807 1808 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1809 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1810 1811 port->is_enabled = true; 1812 /* private parameters */ 1813 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1814 port->sm_rx_state = 0; 1815 port->sm_rx_timer_counter = 0; 1816 port->sm_periodic_state = 0; 1817 port->sm_periodic_timer_counter = 0; 1818 port->sm_mux_state = 0; 1819 port->sm_mux_timer_counter = 0; 1820 port->sm_tx_state = 0; 1821 port->aggregator = NULL; 1822 port->next_port_in_aggregator = NULL; 1823 port->transaction_id = 0; 1824 1825 port->sm_churn_actor_timer_counter = 0; 1826 port->sm_churn_actor_state = 0; 1827 port->churn_actor_count = 0; 1828 port->sm_churn_partner_timer_counter = 0; 1829 port->sm_churn_partner_state = 0; 1830 port->churn_partner_count = 0; 1831 1832 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1833 } 1834 } 1835 1836 /** 1837 * ad_enable_collecting_distributing - enable a port's transmit/receive 1838 * @port: the port we're looking at 1839 * @update_slave_arr: Does slave array need update? 1840 * 1841 * Enable @port if it's in an active aggregator 1842 */ 1843 static void ad_enable_collecting_distributing(struct port *port, 1844 bool *update_slave_arr) 1845 { 1846 if (port->aggregator->is_active) { 1847 pr_debug("Enabling port %d(LAG %d)\n", 1848 port->actor_port_number, 1849 port->aggregator->aggregator_identifier); 1850 __enable_port(port); 1851 /* Slave array needs update */ 1852 *update_slave_arr = true; 1853 } 1854 } 1855 1856 /** 1857 * ad_disable_collecting_distributing - disable a port's transmit/receive 1858 * @port: the port we're looking at 1859 * @update_slave_arr: Does slave array need update? 1860 */ 1861 static void ad_disable_collecting_distributing(struct port *port, 1862 bool *update_slave_arr) 1863 { 1864 if (port->aggregator && 1865 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1866 &(null_mac_addr))) { 1867 pr_debug("Disabling port %d(LAG %d)\n", 1868 port->actor_port_number, 1869 port->aggregator->aggregator_identifier); 1870 __disable_port(port); 1871 /* Slave array needs an update */ 1872 *update_slave_arr = true; 1873 } 1874 } 1875 1876 /** 1877 * ad_marker_info_received - handle receive of a Marker information frame 1878 * @marker_info: Marker info received 1879 * @port: the port we're looking at 1880 */ 1881 static void ad_marker_info_received(struct bond_marker *marker_info, 1882 struct port *port) 1883 { 1884 struct bond_marker marker; 1885 1886 /* copy the received marker data to the response marker */ 1887 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1888 /* change the marker subtype to marker response */ 1889 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1890 1891 /* send the marker response */ 1892 if (ad_marker_send(port, &marker) >= 0) { 1893 pr_debug("Sent Marker Response on port %d\n", 1894 port->actor_port_number); 1895 } 1896 } 1897 1898 /** 1899 * ad_marker_response_received - handle receive of a marker response frame 1900 * @marker: marker PDU received 1901 * @port: the port we're looking at 1902 * 1903 * This function does nothing since we decided not to implement send and handle 1904 * response for marker PDU's, in this stage, but only to respond to marker 1905 * information. 1906 */ 1907 static void ad_marker_response_received(struct bond_marker *marker, 1908 struct port *port) 1909 { 1910 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1911 } 1912 1913 /* ========= AD exported functions to the main bonding code ========= */ 1914 1915 /* Check aggregators status in team every T seconds */ 1916 #define AD_AGGREGATOR_SELECTION_TIMER 8 1917 1918 /** 1919 * bond_3ad_initiate_agg_selection - initate aggregator selection 1920 * @bond: bonding struct 1921 * 1922 * Set the aggregation selection timer, to initiate an agg selection in 1923 * the very near future. Called during first initialization, and during 1924 * any down to up transitions of the bond. 1925 */ 1926 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1927 { 1928 BOND_AD_INFO(bond).agg_select_timer = timeout; 1929 } 1930 1931 /** 1932 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1933 * @bond: bonding struct to work on 1934 * @tick_resolution: tick duration (millisecond resolution) 1935 * 1936 * Can be called only after the mac address of the bond is set. 1937 */ 1938 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1939 { 1940 /* check that the bond is not initialized yet */ 1941 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1942 bond->dev->dev_addr)) { 1943 1944 BOND_AD_INFO(bond).aggregator_identifier = 0; 1945 1946 BOND_AD_INFO(bond).system.sys_priority = 1947 bond->params.ad_actor_sys_prio; 1948 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1949 BOND_AD_INFO(bond).system.sys_mac_addr = 1950 *((struct mac_addr *)bond->dev->dev_addr); 1951 else 1952 BOND_AD_INFO(bond).system.sys_mac_addr = 1953 *((struct mac_addr *)bond->params.ad_actor_system); 1954 1955 /* initialize how many times this module is called in one 1956 * second (should be about every 100ms) 1957 */ 1958 ad_ticks_per_sec = tick_resolution; 1959 1960 bond_3ad_initiate_agg_selection(bond, 1961 AD_AGGREGATOR_SELECTION_TIMER * 1962 ad_ticks_per_sec); 1963 } 1964 } 1965 1966 /** 1967 * bond_3ad_bind_slave - initialize a slave's port 1968 * @slave: slave struct to work on 1969 * 1970 * Returns: 0 on success 1971 * < 0 on error 1972 */ 1973 void bond_3ad_bind_slave(struct slave *slave) 1974 { 1975 struct bonding *bond = bond_get_bond_by_slave(slave); 1976 struct port *port; 1977 struct aggregator *aggregator; 1978 1979 /* check that the slave has not been initialized yet. */ 1980 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 1981 1982 /* port initialization */ 1983 port = &(SLAVE_AD_INFO(slave)->port); 1984 1985 ad_initialize_port(port, bond->params.lacp_fast); 1986 1987 port->slave = slave; 1988 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 1989 /* key is determined according to the link speed, duplex and 1990 * user key 1991 */ 1992 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 1993 ad_update_actor_keys(port, false); 1994 /* actor system is the bond's system */ 1995 __ad_actor_update_port(port); 1996 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 1997 * lacpdu's are sent in one second) 1998 */ 1999 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2000 2001 __disable_port(port); 2002 2003 /* aggregator initialization */ 2004 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2005 2006 ad_initialize_agg(aggregator); 2007 2008 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2009 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2010 aggregator->slave = slave; 2011 aggregator->is_active = 0; 2012 aggregator->num_of_ports = 0; 2013 } 2014 } 2015 2016 /** 2017 * bond_3ad_unbind_slave - deinitialize a slave's port 2018 * @slave: slave struct to work on 2019 * 2020 * Search for the aggregator that is related to this port, remove the 2021 * aggregator and assign another aggregator for other port related to it 2022 * (if any), and remove the port. 2023 */ 2024 void bond_3ad_unbind_slave(struct slave *slave) 2025 { 2026 struct port *port, *prev_port, *temp_port; 2027 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2028 int select_new_active_agg = 0; 2029 struct bonding *bond = slave->bond; 2030 struct slave *slave_iter; 2031 struct list_head *iter; 2032 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2033 2034 /* Sync against bond_3ad_state_machine_handler() */ 2035 spin_lock_bh(&bond->mode_lock); 2036 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2037 port = &(SLAVE_AD_INFO(slave)->port); 2038 2039 /* if slave is null, the whole port is not initialized */ 2040 if (!port->slave) { 2041 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2042 slave->dev->name); 2043 goto out; 2044 } 2045 2046 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2047 aggregator->aggregator_identifier); 2048 2049 /* Tell the partner that this port is not suitable for aggregation */ 2050 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2051 __update_lacpdu_from_port(port); 2052 ad_lacpdu_send(port); 2053 2054 /* check if this aggregator is occupied */ 2055 if (aggregator->lag_ports) { 2056 /* check if there are other ports related to this aggregator 2057 * except the port related to this slave(thats ensure us that 2058 * there is a reason to search for new aggregator, and that we 2059 * will find one 2060 */ 2061 if ((aggregator->lag_ports != port) || 2062 (aggregator->lag_ports->next_port_in_aggregator)) { 2063 /* find new aggregator for the related port(s) */ 2064 bond_for_each_slave(bond, slave_iter, iter) { 2065 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2066 /* if the new aggregator is empty, or it is 2067 * connected to our port only 2068 */ 2069 if (!new_aggregator->lag_ports || 2070 ((new_aggregator->lag_ports == port) && 2071 !new_aggregator->lag_ports->next_port_in_aggregator)) 2072 break; 2073 } 2074 if (!slave_iter) 2075 new_aggregator = NULL; 2076 2077 /* if new aggregator found, copy the aggregator's 2078 * parameters and connect the related lag_ports to the 2079 * new aggregator 2080 */ 2081 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2082 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2083 aggregator->aggregator_identifier, 2084 new_aggregator->aggregator_identifier); 2085 2086 if ((new_aggregator->lag_ports == port) && 2087 new_aggregator->is_active) { 2088 netdev_info(bond->dev, "Removing an active aggregator\n"); 2089 select_new_active_agg = 1; 2090 } 2091 2092 new_aggregator->is_individual = aggregator->is_individual; 2093 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2094 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2095 new_aggregator->partner_system = aggregator->partner_system; 2096 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2097 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2098 new_aggregator->receive_state = aggregator->receive_state; 2099 new_aggregator->transmit_state = aggregator->transmit_state; 2100 new_aggregator->lag_ports = aggregator->lag_ports; 2101 new_aggregator->is_active = aggregator->is_active; 2102 new_aggregator->num_of_ports = aggregator->num_of_ports; 2103 2104 /* update the information that is written on 2105 * the ports about the aggregator 2106 */ 2107 for (temp_port = aggregator->lag_ports; temp_port; 2108 temp_port = temp_port->next_port_in_aggregator) { 2109 temp_port->aggregator = new_aggregator; 2110 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2111 } 2112 2113 ad_clear_agg(aggregator); 2114 2115 if (select_new_active_agg) 2116 ad_agg_selection_logic(__get_first_agg(port), 2117 &dummy_slave_update); 2118 } else { 2119 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2120 } 2121 } else { 2122 /* in case that the only port related to this 2123 * aggregator is the one we want to remove 2124 */ 2125 select_new_active_agg = aggregator->is_active; 2126 ad_clear_agg(aggregator); 2127 if (select_new_active_agg) { 2128 netdev_info(bond->dev, "Removing an active aggregator\n"); 2129 /* select new active aggregator */ 2130 temp_aggregator = __get_first_agg(port); 2131 if (temp_aggregator) 2132 ad_agg_selection_logic(temp_aggregator, 2133 &dummy_slave_update); 2134 } 2135 } 2136 } 2137 2138 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2139 2140 /* find the aggregator that this port is connected to */ 2141 bond_for_each_slave(bond, slave_iter, iter) { 2142 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2143 prev_port = NULL; 2144 /* search the port in the aggregator's related ports */ 2145 for (temp_port = temp_aggregator->lag_ports; temp_port; 2146 prev_port = temp_port, 2147 temp_port = temp_port->next_port_in_aggregator) { 2148 if (temp_port == port) { 2149 /* the aggregator found - detach the port from 2150 * this aggregator 2151 */ 2152 if (prev_port) 2153 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2154 else 2155 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2156 temp_aggregator->num_of_ports--; 2157 if (__agg_active_ports(temp_aggregator) == 0) { 2158 select_new_active_agg = temp_aggregator->is_active; 2159 ad_clear_agg(temp_aggregator); 2160 if (select_new_active_agg) { 2161 netdev_info(bond->dev, "Removing an active aggregator\n"); 2162 /* select new active aggregator */ 2163 ad_agg_selection_logic(__get_first_agg(port), 2164 &dummy_slave_update); 2165 } 2166 } 2167 break; 2168 } 2169 } 2170 } 2171 port->slave = NULL; 2172 2173 out: 2174 spin_unlock_bh(&bond->mode_lock); 2175 } 2176 2177 /** 2178 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2179 * @bond: bonding struct to work on 2180 * 2181 * If an ad_actor setting gets changed we need to update the individual port 2182 * settings so the bond device will use the new values when it gets upped. 2183 */ 2184 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2185 { 2186 struct list_head *iter; 2187 struct slave *slave; 2188 2189 ASSERT_RTNL(); 2190 2191 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2192 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2193 BOND_AD_INFO(bond).system.sys_mac_addr = 2194 *((struct mac_addr *)bond->dev->dev_addr); 2195 else 2196 BOND_AD_INFO(bond).system.sys_mac_addr = 2197 *((struct mac_addr *)bond->params.ad_actor_system); 2198 2199 spin_lock_bh(&bond->mode_lock); 2200 bond_for_each_slave(bond, slave, iter) { 2201 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2202 2203 __ad_actor_update_port(port); 2204 port->ntt = true; 2205 } 2206 spin_unlock_bh(&bond->mode_lock); 2207 } 2208 2209 /** 2210 * bond_3ad_state_machine_handler - handle state machines timeout 2211 * @bond: bonding struct to work on 2212 * 2213 * The state machine handling concept in this module is to check every tick 2214 * which state machine should operate any function. The execution order is 2215 * round robin, so when we have an interaction between state machines, the 2216 * reply of one to each other might be delayed until next tick. 2217 * 2218 * This function also complete the initialization when the agg_select_timer 2219 * times out, and it selects an aggregator for the ports that are yet not 2220 * related to any aggregator, and selects the active aggregator for a bond. 2221 */ 2222 void bond_3ad_state_machine_handler(struct work_struct *work) 2223 { 2224 struct bonding *bond = container_of(work, struct bonding, 2225 ad_work.work); 2226 struct aggregator *aggregator; 2227 struct list_head *iter; 2228 struct slave *slave; 2229 struct port *port; 2230 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2231 bool update_slave_arr = false; 2232 2233 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2234 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2235 * concurrently due to incoming LACPDU as well. 2236 */ 2237 spin_lock_bh(&bond->mode_lock); 2238 rcu_read_lock(); 2239 2240 /* check if there are any slaves */ 2241 if (!bond_has_slaves(bond)) 2242 goto re_arm; 2243 2244 /* check if agg_select_timer timer after initialize is timed out */ 2245 if (BOND_AD_INFO(bond).agg_select_timer && 2246 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2247 slave = bond_first_slave_rcu(bond); 2248 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2249 2250 /* select the active aggregator for the bond */ 2251 if (port) { 2252 if (!port->slave) { 2253 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2254 bond->dev->name); 2255 goto re_arm; 2256 } 2257 2258 aggregator = __get_first_agg(port); 2259 ad_agg_selection_logic(aggregator, &update_slave_arr); 2260 } 2261 bond_3ad_set_carrier(bond); 2262 } 2263 2264 /* for each port run the state machines */ 2265 bond_for_each_slave_rcu(bond, slave, iter) { 2266 port = &(SLAVE_AD_INFO(slave)->port); 2267 if (!port->slave) { 2268 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2269 bond->dev->name); 2270 goto re_arm; 2271 } 2272 2273 ad_rx_machine(NULL, port); 2274 ad_periodic_machine(port); 2275 ad_port_selection_logic(port, &update_slave_arr); 2276 ad_mux_machine(port, &update_slave_arr); 2277 ad_tx_machine(port); 2278 ad_churn_machine(port); 2279 2280 /* turn off the BEGIN bit, since we already handled it */ 2281 if (port->sm_vars & AD_PORT_BEGIN) 2282 port->sm_vars &= ~AD_PORT_BEGIN; 2283 } 2284 2285 re_arm: 2286 bond_for_each_slave_rcu(bond, slave, iter) { 2287 if (slave->should_notify) { 2288 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2289 break; 2290 } 2291 } 2292 rcu_read_unlock(); 2293 spin_unlock_bh(&bond->mode_lock); 2294 2295 if (update_slave_arr) 2296 bond_slave_arr_work_rearm(bond, 0); 2297 2298 if (should_notify_rtnl && rtnl_trylock()) { 2299 bond_slave_state_notify(bond); 2300 rtnl_unlock(); 2301 } 2302 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2303 } 2304 2305 /** 2306 * bond_3ad_rx_indication - handle a received frame 2307 * @lacpdu: received lacpdu 2308 * @slave: slave struct to work on 2309 * @length: length of the data received 2310 * 2311 * It is assumed that frames that were sent on this NIC don't returned as new 2312 * received frames (loopback). Since only the payload is given to this 2313 * function, it check for loopback. 2314 */ 2315 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2316 u16 length) 2317 { 2318 struct port *port; 2319 int ret = RX_HANDLER_ANOTHER; 2320 2321 if (length >= sizeof(struct lacpdu)) { 2322 2323 port = &(SLAVE_AD_INFO(slave)->port); 2324 2325 if (!port->slave) { 2326 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2327 slave->dev->name, slave->bond->dev->name); 2328 return ret; 2329 } 2330 2331 switch (lacpdu->subtype) { 2332 case AD_TYPE_LACPDU: 2333 ret = RX_HANDLER_CONSUMED; 2334 netdev_dbg(slave->bond->dev, 2335 "Received LACPDU on port %d slave %s\n", 2336 port->actor_port_number, 2337 slave->dev->name); 2338 /* Protect against concurrent state machines */ 2339 spin_lock(&slave->bond->mode_lock); 2340 ad_rx_machine(lacpdu, port); 2341 spin_unlock(&slave->bond->mode_lock); 2342 break; 2343 2344 case AD_TYPE_MARKER: 2345 ret = RX_HANDLER_CONSUMED; 2346 /* No need to convert fields to Little Endian since we 2347 * don't use the marker's fields. 2348 */ 2349 2350 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2351 case AD_MARKER_INFORMATION_SUBTYPE: 2352 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2353 port->actor_port_number); 2354 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2355 break; 2356 2357 case AD_MARKER_RESPONSE_SUBTYPE: 2358 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2359 port->actor_port_number); 2360 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2361 break; 2362 2363 default: 2364 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2365 port->actor_port_number); 2366 } 2367 } 2368 } 2369 return ret; 2370 } 2371 2372 /** 2373 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2374 * its current speed and duplex settings. 2375 * 2376 * @port: the port we'are looking at 2377 * @reset: Boolean to just reset the speed and the duplex part of the key 2378 * 2379 * The logic to change the oper / admin keys is: 2380 * (a) A full duplex port can participate in LACP with partner. 2381 * (b) When the speed is changed, LACP need to be reinitiated. 2382 */ 2383 static void ad_update_actor_keys(struct port *port, bool reset) 2384 { 2385 u8 duplex = 0; 2386 u16 ospeed = 0, speed = 0; 2387 u16 old_oper_key = port->actor_oper_port_key; 2388 2389 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2390 if (!reset) { 2391 speed = __get_link_speed(port); 2392 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2393 duplex = __get_duplex(port); 2394 port->actor_admin_port_key |= (speed << 1) | duplex; 2395 } 2396 port->actor_oper_port_key = port->actor_admin_port_key; 2397 2398 if (old_oper_key != port->actor_oper_port_key) { 2399 /* Only 'duplex' port participates in LACP */ 2400 if (duplex) 2401 port->sm_vars |= AD_PORT_LACP_ENABLED; 2402 else 2403 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2404 2405 if (!reset) { 2406 if (!speed) { 2407 netdev_err(port->slave->dev, 2408 "speed changed to 0 for port %s", 2409 port->slave->dev->name); 2410 } else if (duplex && ospeed != speed) { 2411 /* Speed change restarts LACP state-machine */ 2412 port->sm_vars |= AD_PORT_BEGIN; 2413 } 2414 } 2415 } 2416 } 2417 2418 /** 2419 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2420 * change indication 2421 * 2422 * @slave: slave struct to work on 2423 * 2424 * Handle reselection of aggregator (if needed) for this port. 2425 */ 2426 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2427 { 2428 struct port *port; 2429 2430 port = &(SLAVE_AD_INFO(slave)->port); 2431 2432 /* if slave is null, the whole port is not initialized */ 2433 if (!port->slave) { 2434 netdev_warn(slave->bond->dev, 2435 "speed/duplex changed for uninitialized port %s\n", 2436 slave->dev->name); 2437 return; 2438 } 2439 2440 spin_lock_bh(&slave->bond->mode_lock); 2441 ad_update_actor_keys(port, false); 2442 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", 2443 port->actor_port_number, slave->dev->name); 2444 spin_unlock_bh(&slave->bond->mode_lock); 2445 } 2446 2447 /** 2448 * bond_3ad_handle_link_change - handle a slave's link status change indication 2449 * @slave: slave struct to work on 2450 * @status: whether the link is now up or down 2451 * 2452 * Handle reselection of aggregator (if needed) for this port. 2453 */ 2454 void bond_3ad_handle_link_change(struct slave *slave, char link) 2455 { 2456 struct aggregator *agg; 2457 struct port *port; 2458 bool dummy; 2459 2460 port = &(SLAVE_AD_INFO(slave)->port); 2461 2462 /* if slave is null, the whole port is not initialized */ 2463 if (!port->slave) { 2464 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2465 slave->dev->name); 2466 return; 2467 } 2468 2469 spin_lock_bh(&slave->bond->mode_lock); 2470 /* on link down we are zeroing duplex and speed since 2471 * some of the adaptors(ce1000.lan) report full duplex/speed 2472 * instead of N/A(duplex) / 0(speed). 2473 * 2474 * on link up we are forcing recheck on the duplex and speed since 2475 * some of he adaptors(ce1000.lan) report. 2476 */ 2477 if (link == BOND_LINK_UP) { 2478 port->is_enabled = true; 2479 ad_update_actor_keys(port, false); 2480 } else { 2481 /* link has failed */ 2482 port->is_enabled = false; 2483 ad_update_actor_keys(port, true); 2484 } 2485 agg = __get_first_agg(port); 2486 ad_agg_selection_logic(agg, &dummy); 2487 2488 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2489 port->actor_port_number, 2490 link == BOND_LINK_UP ? "UP" : "DOWN"); 2491 2492 spin_unlock_bh(&slave->bond->mode_lock); 2493 2494 /* RTNL is held and mode_lock is released so it's safe 2495 * to update slave_array here. 2496 */ 2497 bond_update_slave_arr(slave->bond, NULL); 2498 } 2499 2500 /** 2501 * bond_3ad_set_carrier - set link state for bonding master 2502 * @bond - bonding structure 2503 * 2504 * if we have an active aggregator, we're up, if not, we're down. 2505 * Presumes that we cannot have an active aggregator if there are 2506 * no slaves with link up. 2507 * 2508 * This behavior complies with IEEE 802.3 section 43.3.9. 2509 * 2510 * Called by bond_set_carrier(). Return zero if carrier state does not 2511 * change, nonzero if it does. 2512 */ 2513 int bond_3ad_set_carrier(struct bonding *bond) 2514 { 2515 struct aggregator *active; 2516 struct slave *first_slave; 2517 int ret = 1; 2518 2519 rcu_read_lock(); 2520 first_slave = bond_first_slave_rcu(bond); 2521 if (!first_slave) { 2522 ret = 0; 2523 goto out; 2524 } 2525 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2526 if (active) { 2527 /* are enough slaves available to consider link up? */ 2528 if (__agg_active_ports(active) < bond->params.min_links) { 2529 if (netif_carrier_ok(bond->dev)) { 2530 netif_carrier_off(bond->dev); 2531 goto out; 2532 } 2533 } else if (!netif_carrier_ok(bond->dev)) { 2534 netif_carrier_on(bond->dev); 2535 goto out; 2536 } 2537 } else if (netif_carrier_ok(bond->dev)) { 2538 netif_carrier_off(bond->dev); 2539 } 2540 out: 2541 rcu_read_unlock(); 2542 return ret; 2543 } 2544 2545 /** 2546 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2547 * @bond: bonding struct to work on 2548 * @ad_info: ad_info struct to fill with the bond's info 2549 * 2550 * Returns: 0 on success 2551 * < 0 on error 2552 */ 2553 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2554 struct ad_info *ad_info) 2555 { 2556 struct aggregator *aggregator = NULL; 2557 struct list_head *iter; 2558 struct slave *slave; 2559 struct port *port; 2560 2561 bond_for_each_slave_rcu(bond, slave, iter) { 2562 port = &(SLAVE_AD_INFO(slave)->port); 2563 if (port->aggregator && port->aggregator->is_active) { 2564 aggregator = port->aggregator; 2565 break; 2566 } 2567 } 2568 2569 if (!aggregator) 2570 return -1; 2571 2572 ad_info->aggregator_id = aggregator->aggregator_identifier; 2573 ad_info->ports = aggregator->num_of_ports; 2574 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2575 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2576 ether_addr_copy(ad_info->partner_system, 2577 aggregator->partner_system.mac_addr_value); 2578 return 0; 2579 } 2580 2581 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2582 { 2583 int ret; 2584 2585 rcu_read_lock(); 2586 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2587 rcu_read_unlock(); 2588 2589 return ret; 2590 } 2591 2592 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2593 struct slave *slave) 2594 { 2595 struct lacpdu *lacpdu, _lacpdu; 2596 2597 if (skb->protocol != PKT_TYPE_LACPDU) 2598 return RX_HANDLER_ANOTHER; 2599 2600 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2601 return RX_HANDLER_ANOTHER; 2602 2603 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2604 if (!lacpdu) 2605 return RX_HANDLER_ANOTHER; 2606 2607 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2608 } 2609 2610 /** 2611 * bond_3ad_update_lacp_rate - change the lacp rate 2612 * @bond - bonding struct 2613 * 2614 * When modify lacp_rate parameter via sysfs, 2615 * update actor_oper_port_state of each port. 2616 * 2617 * Hold bond->mode_lock, 2618 * so we can modify port->actor_oper_port_state, 2619 * no matter bond is up or down. 2620 */ 2621 void bond_3ad_update_lacp_rate(struct bonding *bond) 2622 { 2623 struct port *port = NULL; 2624 struct list_head *iter; 2625 struct slave *slave; 2626 int lacp_fast; 2627 2628 lacp_fast = bond->params.lacp_fast; 2629 spin_lock_bh(&bond->mode_lock); 2630 bond_for_each_slave(bond, slave, iter) { 2631 port = &(SLAVE_AD_INFO(slave)->port); 2632 if (lacp_fast) 2633 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2634 else 2635 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2636 } 2637 spin_unlock_bh(&bond->mode_lock); 2638 } 2639