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 const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 105 0, 0, 0, 0, 0, 0 106 }; 107 static u16 ad_ticks_per_sec; 108 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 109 110 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = 111 MULTICAST_LACPDU_ADDR; 112 113 /* ================= main 802.3ad protocol functions ================== */ 114 static int ad_lacpdu_send(struct port *port); 115 static int ad_marker_send(struct port *port, struct bond_marker *marker); 116 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 117 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 118 static void ad_tx_machine(struct port *port); 119 static void ad_periodic_machine(struct port *port); 120 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 121 static void ad_agg_selection_logic(struct aggregator *aggregator, 122 bool *update_slave_arr); 123 static void ad_clear_agg(struct aggregator *aggregator); 124 static void ad_initialize_agg(struct aggregator *aggregator); 125 static void ad_initialize_port(struct port *port, int lacp_fast); 126 static void ad_enable_collecting_distributing(struct port *port, 127 bool *update_slave_arr); 128 static void ad_disable_collecting_distributing(struct port *port, 129 bool *update_slave_arr); 130 static void ad_marker_info_received(struct bond_marker *marker_info, 131 struct port *port); 132 static void ad_marker_response_received(struct bond_marker *marker, 133 struct port *port); 134 static void ad_update_actor_keys(struct port *port, bool reset); 135 136 137 /* ================= api to bonding and kernel code ================== */ 138 139 /** 140 * __get_bond_by_port - get the port's bonding struct 141 * @port: the port we're looking at 142 * 143 * Return @port's bonding struct, or %NULL if it can't be found. 144 */ 145 static inline struct bonding *__get_bond_by_port(struct port *port) 146 { 147 if (port->slave == NULL) 148 return NULL; 149 150 return bond_get_bond_by_slave(port->slave); 151 } 152 153 /** 154 * __get_first_agg - get the first aggregator in the bond 155 * @bond: the bond we're looking at 156 * 157 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 158 * found. 159 * The caller must hold RCU or RTNL lock. 160 */ 161 static inline struct aggregator *__get_first_agg(struct port *port) 162 { 163 struct bonding *bond = __get_bond_by_port(port); 164 struct slave *first_slave; 165 struct aggregator *agg; 166 167 /* If there's no bond for this port, or bond has no slaves */ 168 if (bond == NULL) 169 return NULL; 170 171 rcu_read_lock(); 172 first_slave = bond_first_slave_rcu(bond); 173 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 174 rcu_read_unlock(); 175 176 return agg; 177 } 178 179 /** 180 * __agg_has_partner - see if we have a partner 181 * @agg: the agregator we're looking at 182 * 183 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 184 * address for the partner). Return 0 if not. 185 */ 186 static inline int __agg_has_partner(struct aggregator *agg) 187 { 188 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 189 } 190 191 /** 192 * __disable_port - disable the port's slave 193 * @port: the port we're looking at 194 */ 195 static inline void __disable_port(struct port *port) 196 { 197 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 198 } 199 200 /** 201 * __enable_port - enable the port's slave, if it's up 202 * @port: the port we're looking at 203 */ 204 static inline void __enable_port(struct port *port) 205 { 206 struct slave *slave = port->slave; 207 208 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 209 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 210 } 211 212 /** 213 * __port_is_enabled - check if the port's slave is in active state 214 * @port: the port we're looking at 215 */ 216 static inline int __port_is_enabled(struct port *port) 217 { 218 return bond_is_active_slave(port->slave); 219 } 220 221 /** 222 * __get_agg_selection_mode - get the aggregator selection mode 223 * @port: the port we're looking at 224 * 225 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 226 */ 227 static inline u32 __get_agg_selection_mode(struct port *port) 228 { 229 struct bonding *bond = __get_bond_by_port(port); 230 231 if (bond == NULL) 232 return BOND_AD_STABLE; 233 234 return bond->params.ad_select; 235 } 236 237 /** 238 * __check_agg_selection_timer - check if the selection timer has expired 239 * @port: the port we're looking at 240 */ 241 static inline int __check_agg_selection_timer(struct port *port) 242 { 243 struct bonding *bond = __get_bond_by_port(port); 244 245 if (bond == NULL) 246 return 0; 247 248 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 249 } 250 251 /** 252 * __get_link_speed - get a port's speed 253 * @port: the port we're looking at 254 * 255 * Return @port's speed in 802.3ad enum format. i.e. one of: 256 * 0, 257 * %AD_LINK_SPEED_10MBPS, 258 * %AD_LINK_SPEED_100MBPS, 259 * %AD_LINK_SPEED_1000MBPS, 260 * %AD_LINK_SPEED_2500MBPS, 261 * %AD_LINK_SPEED_10000MBPS 262 * %AD_LINK_SPEED_20000MBPS 263 * %AD_LINK_SPEED_40000MBPS 264 * %AD_LINK_SPEED_56000MBPS 265 * %AD_LINK_SPEED_100000MBPS 266 */ 267 static u16 __get_link_speed(struct port *port) 268 { 269 struct slave *slave = port->slave; 270 u16 speed; 271 272 /* this if covers only a special case: when the configuration starts 273 * with link down, it sets the speed to 0. 274 * This is done in spite of the fact that the e100 driver reports 0 275 * to be compatible with MVT in the future. 276 */ 277 if (slave->link != BOND_LINK_UP) 278 speed = 0; 279 else { 280 switch (slave->speed) { 281 case SPEED_10: 282 speed = AD_LINK_SPEED_10MBPS; 283 break; 284 285 case SPEED_100: 286 speed = AD_LINK_SPEED_100MBPS; 287 break; 288 289 case SPEED_1000: 290 speed = AD_LINK_SPEED_1000MBPS; 291 break; 292 293 case SPEED_2500: 294 speed = AD_LINK_SPEED_2500MBPS; 295 break; 296 297 case SPEED_10000: 298 speed = AD_LINK_SPEED_10000MBPS; 299 break; 300 301 case SPEED_20000: 302 speed = AD_LINK_SPEED_20000MBPS; 303 break; 304 305 case SPEED_40000: 306 speed = AD_LINK_SPEED_40000MBPS; 307 break; 308 309 case SPEED_56000: 310 speed = AD_LINK_SPEED_56000MBPS; 311 break; 312 313 case SPEED_100000: 314 speed = AD_LINK_SPEED_100000MBPS; 315 break; 316 317 default: 318 /* unknown speed value from ethtool. shouldn't happen */ 319 speed = 0; 320 break; 321 } 322 } 323 324 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 325 port->actor_port_number, speed); 326 return speed; 327 } 328 329 /** 330 * __get_duplex - get a port's duplex 331 * @port: the port we're looking at 332 * 333 * Return @port's duplex in 802.3ad bitmask format. i.e.: 334 * 0x01 if in full duplex 335 * 0x00 otherwise 336 */ 337 static u8 __get_duplex(struct port *port) 338 { 339 struct slave *slave = port->slave; 340 u8 retval = 0x0; 341 342 /* handling a special case: when the configuration starts with 343 * link down, it sets the duplex to 0. 344 */ 345 if (slave->link == BOND_LINK_UP) { 346 switch (slave->duplex) { 347 case DUPLEX_FULL: 348 retval = 0x1; 349 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 350 port->actor_port_number); 351 break; 352 case DUPLEX_HALF: 353 default: 354 retval = 0x0; 355 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 356 port->actor_port_number); 357 break; 358 } 359 } 360 return retval; 361 } 362 363 static void __ad_actor_update_port(struct port *port) 364 { 365 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 366 367 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 368 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 369 } 370 371 /* Conversions */ 372 373 /** 374 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 375 * @timer_type: which timer to operate 376 * @par: timer parameter. see below 377 * 378 * If @timer_type is %current_while_timer, @par indicates long/short timer. 379 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 380 * %SLOW_PERIODIC_TIME. 381 */ 382 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 383 { 384 u16 retval = 0; /* to silence the compiler */ 385 386 switch (timer_type) { 387 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 388 if (par) 389 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 390 else 391 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 392 break; 393 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 394 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 395 break; 396 case AD_PERIODIC_TIMER: /* for periodic machine */ 397 retval = (par*ad_ticks_per_sec); /* long timeout */ 398 break; 399 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 400 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 401 break; 402 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 403 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 404 break; 405 } 406 407 return retval; 408 } 409 410 411 /* ================= ad_rx_machine helper functions ================== */ 412 413 /** 414 * __choose_matched - update a port's matched variable from a received lacpdu 415 * @lacpdu: the lacpdu we've received 416 * @port: the port we're looking at 417 * 418 * Update the value of the matched variable, using parameter values from a 419 * newly received lacpdu. Parameter values for the partner carried in the 420 * received PDU are compared with the corresponding operational parameter 421 * values for the actor. Matched is set to TRUE if all of these parameters 422 * match and the PDU parameter partner_state.aggregation has the same value as 423 * actor_oper_port_state.aggregation and lacp will actively maintain the link 424 * in the aggregation. Matched is also set to TRUE if the value of 425 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 426 * an individual link and lacp will actively maintain the link. Otherwise, 427 * matched is set to FALSE. LACP is considered to be actively maintaining the 428 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 429 * the actor's actor_oper_port_state.lacp_activity and the PDU's 430 * partner_state.lacp_activity variables are TRUE. 431 * 432 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 433 * used here to implement the language from 802.3ad 43.4.9 that requires 434 * recordPDU to "match" the LACPDU parameters to the stored values. 435 */ 436 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 437 { 438 /* check if all parameters are alike 439 * or this is individual link(aggregation == FALSE) 440 * then update the state machine Matched variable. 441 */ 442 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 443 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 444 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 445 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 446 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 447 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 448 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 449 ) { 450 port->sm_vars |= AD_PORT_MATCHED; 451 } else { 452 port->sm_vars &= ~AD_PORT_MATCHED; 453 } 454 } 455 456 /** 457 * __record_pdu - record parameters from a received lacpdu 458 * @lacpdu: the lacpdu we've received 459 * @port: the port we're looking at 460 * 461 * Record the parameter values for the Actor carried in a received lacpdu as 462 * the current partner operational parameter values and sets 463 * actor_oper_port_state.defaulted to FALSE. 464 */ 465 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 466 { 467 if (lacpdu && port) { 468 struct port_params *partner = &port->partner_oper; 469 470 __choose_matched(lacpdu, port); 471 /* record the new parameter values for the partner 472 * operational 473 */ 474 partner->port_number = ntohs(lacpdu->actor_port); 475 partner->port_priority = ntohs(lacpdu->actor_port_priority); 476 partner->system = lacpdu->actor_system; 477 partner->system_priority = ntohs(lacpdu->actor_system_priority); 478 partner->key = ntohs(lacpdu->actor_key); 479 partner->port_state = lacpdu->actor_state; 480 481 /* set actor_oper_port_state.defaulted to FALSE */ 482 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 483 484 /* set the partner sync. to on if the partner is sync, 485 * and the port is matched 486 */ 487 if ((port->sm_vars & AD_PORT_MATCHED) && 488 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 489 partner->port_state |= AD_STATE_SYNCHRONIZATION; 490 pr_debug("%s partner sync=1\n", port->slave->dev->name); 491 } else { 492 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 493 pr_debug("%s partner sync=0\n", port->slave->dev->name); 494 } 495 } 496 } 497 498 /** 499 * __record_default - record default parameters 500 * @port: the port we're looking at 501 * 502 * This function records the default parameter values for the partner carried 503 * in the Partner Admin parameters as the current partner operational parameter 504 * values and sets actor_oper_port_state.defaulted to TRUE. 505 */ 506 static void __record_default(struct port *port) 507 { 508 if (port) { 509 /* record the partner admin parameters */ 510 memcpy(&port->partner_oper, &port->partner_admin, 511 sizeof(struct port_params)); 512 513 /* set actor_oper_port_state.defaulted to true */ 514 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 515 } 516 } 517 518 /** 519 * __update_selected - update a port's Selected variable from a received lacpdu 520 * @lacpdu: the lacpdu we've received 521 * @port: the port we're looking at 522 * 523 * Update the value of the selected variable, using parameter values from a 524 * newly received lacpdu. The parameter values for the Actor carried in the 525 * received PDU are compared with the corresponding operational parameter 526 * values for the ports partner. If one or more of the comparisons shows that 527 * the value(s) received in the PDU differ from the current operational values, 528 * then selected is set to FALSE and actor_oper_port_state.synchronization is 529 * set to out_of_sync. Otherwise, selected remains unchanged. 530 */ 531 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 532 { 533 if (lacpdu && port) { 534 const struct port_params *partner = &port->partner_oper; 535 536 /* check if any parameter is different then 537 * update the state machine selected variable. 538 */ 539 if (ntohs(lacpdu->actor_port) != partner->port_number || 540 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 541 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 542 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 543 ntohs(lacpdu->actor_key) != partner->key || 544 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 545 port->sm_vars &= ~AD_PORT_SELECTED; 546 } 547 } 548 } 549 550 /** 551 * __update_default_selected - update a port's Selected variable from Partner 552 * @port: the port we're looking at 553 * 554 * This function updates the value of the selected variable, using the partner 555 * administrative parameter values. The administrative values are compared with 556 * the corresponding operational parameter values for the partner. If one or 557 * more of the comparisons shows that the administrative value(s) differ from 558 * the current operational values, then Selected is set to FALSE and 559 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 560 * Selected remains unchanged. 561 */ 562 static void __update_default_selected(struct port *port) 563 { 564 if (port) { 565 const struct port_params *admin = &port->partner_admin; 566 const struct port_params *oper = &port->partner_oper; 567 568 /* check if any parameter is different then 569 * update the state machine selected variable. 570 */ 571 if (admin->port_number != oper->port_number || 572 admin->port_priority != oper->port_priority || 573 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 574 admin->system_priority != oper->system_priority || 575 admin->key != oper->key || 576 (admin->port_state & AD_STATE_AGGREGATION) 577 != (oper->port_state & AD_STATE_AGGREGATION)) { 578 port->sm_vars &= ~AD_PORT_SELECTED; 579 } 580 } 581 } 582 583 /** 584 * __update_ntt - update a port's ntt variable from a received lacpdu 585 * @lacpdu: the lacpdu we've received 586 * @port: the port we're looking at 587 * 588 * Updates the value of the ntt variable, using parameter values from a newly 589 * received lacpdu. The parameter values for the partner carried in the 590 * received PDU are compared with the corresponding operational parameter 591 * values for the Actor. If one or more of the comparisons shows that the 592 * value(s) received in the PDU differ from the current operational values, 593 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 594 */ 595 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 596 { 597 /* validate lacpdu and port */ 598 if (lacpdu && port) { 599 /* check if any parameter is different then 600 * update the port->ntt. 601 */ 602 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 603 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 604 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 605 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 606 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 607 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 608 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 609 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 610 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 611 ) { 612 port->ntt = true; 613 } 614 } 615 } 616 617 /** 618 * __agg_ports_are_ready - check if all ports in an aggregator are ready 619 * @aggregator: the aggregator we're looking at 620 * 621 */ 622 static int __agg_ports_are_ready(struct aggregator *aggregator) 623 { 624 struct port *port; 625 int retval = 1; 626 627 if (aggregator) { 628 /* scan all ports in this aggregator to verfy if they are 629 * all ready. 630 */ 631 for (port = aggregator->lag_ports; 632 port; 633 port = port->next_port_in_aggregator) { 634 if (!(port->sm_vars & AD_PORT_READY_N)) { 635 retval = 0; 636 break; 637 } 638 } 639 } 640 641 return retval; 642 } 643 644 /** 645 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 646 * @aggregator: the aggregator we're looking at 647 * @val: Should the ports' ready bit be set on or off 648 * 649 */ 650 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 651 { 652 struct port *port; 653 654 for (port = aggregator->lag_ports; port; 655 port = port->next_port_in_aggregator) { 656 if (val) 657 port->sm_vars |= AD_PORT_READY; 658 else 659 port->sm_vars &= ~AD_PORT_READY; 660 } 661 } 662 663 static int __agg_active_ports(struct aggregator *agg) 664 { 665 struct port *port; 666 int active = 0; 667 668 for (port = agg->lag_ports; port; 669 port = port->next_port_in_aggregator) { 670 if (port->is_enabled) 671 active++; 672 } 673 674 return active; 675 } 676 677 /** 678 * __get_agg_bandwidth - get the total bandwidth of an aggregator 679 * @aggregator: the aggregator we're looking at 680 * 681 */ 682 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 683 { 684 int nports = __agg_active_ports(aggregator); 685 u32 bandwidth = 0; 686 687 if (nports) { 688 switch (__get_link_speed(aggregator->lag_ports)) { 689 case AD_LINK_SPEED_1MBPS: 690 bandwidth = nports; 691 break; 692 case AD_LINK_SPEED_10MBPS: 693 bandwidth = nports * 10; 694 break; 695 case AD_LINK_SPEED_100MBPS: 696 bandwidth = nports * 100; 697 break; 698 case AD_LINK_SPEED_1000MBPS: 699 bandwidth = nports * 1000; 700 break; 701 case AD_LINK_SPEED_2500MBPS: 702 bandwidth = nports * 2500; 703 break; 704 case AD_LINK_SPEED_10000MBPS: 705 bandwidth = nports * 10000; 706 break; 707 case AD_LINK_SPEED_20000MBPS: 708 bandwidth = nports * 20000; 709 break; 710 case AD_LINK_SPEED_40000MBPS: 711 bandwidth = nports * 40000; 712 break; 713 case AD_LINK_SPEED_56000MBPS: 714 bandwidth = nports * 56000; 715 break; 716 case AD_LINK_SPEED_100000MBPS: 717 bandwidth = nports * 100000; 718 break; 719 default: 720 bandwidth = 0; /* to silence the compiler */ 721 } 722 } 723 return bandwidth; 724 } 725 726 /** 727 * __get_active_agg - get the current active aggregator 728 * @aggregator: the aggregator we're looking at 729 * 730 * Caller must hold RCU lock. 731 */ 732 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 733 { 734 struct bonding *bond = aggregator->slave->bond; 735 struct list_head *iter; 736 struct slave *slave; 737 738 bond_for_each_slave_rcu(bond, slave, iter) 739 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 740 return &(SLAVE_AD_INFO(slave)->aggregator); 741 742 return NULL; 743 } 744 745 /** 746 * __update_lacpdu_from_port - update a port's lacpdu fields 747 * @port: the port we're looking at 748 */ 749 static inline void __update_lacpdu_from_port(struct port *port) 750 { 751 struct lacpdu *lacpdu = &port->lacpdu; 752 const struct port_params *partner = &port->partner_oper; 753 754 /* update current actual Actor parameters 755 * lacpdu->subtype initialized 756 * lacpdu->version_number initialized 757 * lacpdu->tlv_type_actor_info initialized 758 * lacpdu->actor_information_length initialized 759 */ 760 761 lacpdu->actor_system_priority = htons(port->actor_system_priority); 762 lacpdu->actor_system = port->actor_system; 763 lacpdu->actor_key = htons(port->actor_oper_port_key); 764 lacpdu->actor_port_priority = htons(port->actor_port_priority); 765 lacpdu->actor_port = htons(port->actor_port_number); 766 lacpdu->actor_state = port->actor_oper_port_state; 767 pr_debug("update lacpdu: %s, actor port state %x\n", 768 port->slave->dev->name, port->actor_oper_port_state); 769 770 /* lacpdu->reserved_3_1 initialized 771 * lacpdu->tlv_type_partner_info initialized 772 * lacpdu->partner_information_length initialized 773 */ 774 775 lacpdu->partner_system_priority = htons(partner->system_priority); 776 lacpdu->partner_system = partner->system; 777 lacpdu->partner_key = htons(partner->key); 778 lacpdu->partner_port_priority = htons(partner->port_priority); 779 lacpdu->partner_port = htons(partner->port_number); 780 lacpdu->partner_state = partner->port_state; 781 782 /* lacpdu->reserved_3_2 initialized 783 * lacpdu->tlv_type_collector_info initialized 784 * lacpdu->collector_information_length initialized 785 * collector_max_delay initialized 786 * reserved_12[12] initialized 787 * tlv_type_terminator initialized 788 * terminator_length initialized 789 * reserved_50[50] initialized 790 */ 791 } 792 793 /* ================= main 802.3ad protocol code ========================= */ 794 795 /** 796 * ad_lacpdu_send - send out a lacpdu packet on a given port 797 * @port: the port we're looking at 798 * 799 * Returns: 0 on success 800 * < 0 on error 801 */ 802 static int ad_lacpdu_send(struct port *port) 803 { 804 struct slave *slave = port->slave; 805 struct sk_buff *skb; 806 struct lacpdu_header *lacpdu_header; 807 int length = sizeof(struct lacpdu_header); 808 809 skb = dev_alloc_skb(length); 810 if (!skb) 811 return -ENOMEM; 812 813 skb->dev = slave->dev; 814 skb_reset_mac_header(skb); 815 skb->network_header = skb->mac_header + ETH_HLEN; 816 skb->protocol = PKT_TYPE_LACPDU; 817 skb->priority = TC_PRIO_CONTROL; 818 819 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 820 821 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 822 /* Note: source address is set to be the member's PERMANENT address, 823 * because we use it to identify loopback lacpdus in receive. 824 */ 825 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 826 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 827 828 lacpdu_header->lacpdu = port->lacpdu; 829 830 dev_queue_xmit(skb); 831 832 return 0; 833 } 834 835 /** 836 * ad_marker_send - send marker information/response on a given port 837 * @port: the port we're looking at 838 * @marker: marker data to send 839 * 840 * Returns: 0 on success 841 * < 0 on error 842 */ 843 static int ad_marker_send(struct port *port, struct bond_marker *marker) 844 { 845 struct slave *slave = port->slave; 846 struct sk_buff *skb; 847 struct bond_marker_header *marker_header; 848 int length = sizeof(struct bond_marker_header); 849 850 skb = dev_alloc_skb(length + 16); 851 if (!skb) 852 return -ENOMEM; 853 854 skb_reserve(skb, 16); 855 856 skb->dev = slave->dev; 857 skb_reset_mac_header(skb); 858 skb->network_header = skb->mac_header + ETH_HLEN; 859 skb->protocol = PKT_TYPE_LACPDU; 860 861 marker_header = (struct bond_marker_header *)skb_put(skb, length); 862 863 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 864 /* Note: source address is set to be the member's PERMANENT address, 865 * because we use it to identify loopback MARKERs in receive. 866 */ 867 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 868 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 869 870 marker_header->marker = *marker; 871 872 dev_queue_xmit(skb); 873 874 return 0; 875 } 876 877 /** 878 * ad_mux_machine - handle a port's mux state machine 879 * @port: the port we're looking at 880 * @update_slave_arr: Does slave array need update? 881 */ 882 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 883 { 884 mux_states_t last_state; 885 886 /* keep current State Machine state to compare later if it was 887 * changed 888 */ 889 last_state = port->sm_mux_state; 890 891 if (port->sm_vars & AD_PORT_BEGIN) { 892 port->sm_mux_state = AD_MUX_DETACHED; 893 } else { 894 switch (port->sm_mux_state) { 895 case AD_MUX_DETACHED: 896 if ((port->sm_vars & AD_PORT_SELECTED) 897 || (port->sm_vars & AD_PORT_STANDBY)) 898 /* if SELECTED or STANDBY */ 899 port->sm_mux_state = AD_MUX_WAITING; 900 break; 901 case AD_MUX_WAITING: 902 /* if SELECTED == FALSE return to DETACH state */ 903 if (!(port->sm_vars & AD_PORT_SELECTED)) { 904 port->sm_vars &= ~AD_PORT_READY_N; 905 /* in order to withhold the Selection Logic to 906 * check all ports READY_N value every callback 907 * cycle to update ready variable, we check 908 * READY_N and update READY here 909 */ 910 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 911 port->sm_mux_state = AD_MUX_DETACHED; 912 break; 913 } 914 915 /* check if the wait_while_timer expired */ 916 if (port->sm_mux_timer_counter 917 && !(--port->sm_mux_timer_counter)) 918 port->sm_vars |= AD_PORT_READY_N; 919 920 /* in order to withhold the selection logic to check 921 * all ports READY_N value every callback cycle to 922 * update ready variable, we check READY_N and update 923 * READY here 924 */ 925 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 926 927 /* if the wait_while_timer expired, and the port is 928 * in READY state, move to ATTACHED state 929 */ 930 if ((port->sm_vars & AD_PORT_READY) 931 && !port->sm_mux_timer_counter) 932 port->sm_mux_state = AD_MUX_ATTACHED; 933 break; 934 case AD_MUX_ATTACHED: 935 /* check also if agg_select_timer expired (so the 936 * edable port will take place only after this timer) 937 */ 938 if ((port->sm_vars & AD_PORT_SELECTED) && 939 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 940 !__check_agg_selection_timer(port)) { 941 if (port->aggregator->is_active) 942 port->sm_mux_state = 943 AD_MUX_COLLECTING_DISTRIBUTING; 944 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 945 (port->sm_vars & AD_PORT_STANDBY)) { 946 /* if UNSELECTED or STANDBY */ 947 port->sm_vars &= ~AD_PORT_READY_N; 948 /* in order to withhold the selection logic to 949 * check all ports READY_N value every callback 950 * cycle to update ready variable, we check 951 * READY_N and update READY here 952 */ 953 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 954 port->sm_mux_state = AD_MUX_DETACHED; 955 } else if (port->aggregator->is_active) { 956 port->actor_oper_port_state |= 957 AD_STATE_SYNCHRONIZATION; 958 } 959 break; 960 case AD_MUX_COLLECTING_DISTRIBUTING: 961 if (!(port->sm_vars & AD_PORT_SELECTED) || 962 (port->sm_vars & AD_PORT_STANDBY) || 963 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 964 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 965 port->sm_mux_state = AD_MUX_ATTACHED; 966 } else { 967 /* if port state hasn't changed make 968 * sure that a collecting distributing 969 * port in an active aggregator is enabled 970 */ 971 if (port->aggregator && 972 port->aggregator->is_active && 973 !__port_is_enabled(port)) { 974 975 __enable_port(port); 976 } 977 } 978 break; 979 default: 980 break; 981 } 982 } 983 984 /* check if the state machine was changed */ 985 if (port->sm_mux_state != last_state) { 986 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 987 port->actor_port_number, 988 port->slave->dev->name, 989 last_state, 990 port->sm_mux_state); 991 switch (port->sm_mux_state) { 992 case AD_MUX_DETACHED: 993 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 994 ad_disable_collecting_distributing(port, 995 update_slave_arr); 996 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 997 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 998 port->ntt = true; 999 break; 1000 case AD_MUX_WAITING: 1001 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1002 break; 1003 case AD_MUX_ATTACHED: 1004 if (port->aggregator->is_active) 1005 port->actor_oper_port_state |= 1006 AD_STATE_SYNCHRONIZATION; 1007 else 1008 port->actor_oper_port_state &= 1009 ~AD_STATE_SYNCHRONIZATION; 1010 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1011 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1012 ad_disable_collecting_distributing(port, 1013 update_slave_arr); 1014 port->ntt = true; 1015 break; 1016 case AD_MUX_COLLECTING_DISTRIBUTING: 1017 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1018 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1019 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1020 ad_enable_collecting_distributing(port, 1021 update_slave_arr); 1022 port->ntt = true; 1023 break; 1024 default: 1025 break; 1026 } 1027 } 1028 } 1029 1030 /** 1031 * ad_rx_machine - handle a port's rx State Machine 1032 * @lacpdu: the lacpdu we've received 1033 * @port: the port we're looking at 1034 * 1035 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1036 * CURRENT. If timer expired set the state machine in the proper state. 1037 * In other cases, this function checks if we need to switch to other state. 1038 */ 1039 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1040 { 1041 rx_states_t last_state; 1042 1043 /* keep current State Machine state to compare later if it was 1044 * changed 1045 */ 1046 last_state = port->sm_rx_state; 1047 1048 /* check if state machine should change state */ 1049 1050 /* first, check if port was reinitialized */ 1051 if (port->sm_vars & AD_PORT_BEGIN) { 1052 port->sm_rx_state = AD_RX_INITIALIZE; 1053 port->sm_vars |= AD_PORT_CHURNED; 1054 /* check if port is not enabled */ 1055 } else if (!(port->sm_vars & AD_PORT_BEGIN) 1056 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) 1057 port->sm_rx_state = AD_RX_PORT_DISABLED; 1058 /* check if new lacpdu arrived */ 1059 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1060 (port->sm_rx_state == AD_RX_DEFAULTED) || 1061 (port->sm_rx_state == AD_RX_CURRENT))) { 1062 if (port->sm_rx_state != AD_RX_CURRENT) 1063 port->sm_vars |= AD_PORT_CHURNED; 1064 port->sm_rx_timer_counter = 0; 1065 port->sm_rx_state = AD_RX_CURRENT; 1066 } else { 1067 /* if timer is on, and if it is expired */ 1068 if (port->sm_rx_timer_counter && 1069 !(--port->sm_rx_timer_counter)) { 1070 switch (port->sm_rx_state) { 1071 case AD_RX_EXPIRED: 1072 port->sm_rx_state = AD_RX_DEFAULTED; 1073 break; 1074 case AD_RX_CURRENT: 1075 port->sm_rx_state = AD_RX_EXPIRED; 1076 break; 1077 default: 1078 break; 1079 } 1080 } else { 1081 /* if no lacpdu arrived and no timer is on */ 1082 switch (port->sm_rx_state) { 1083 case AD_RX_PORT_DISABLED: 1084 if (port->sm_vars & AD_PORT_MOVED) 1085 port->sm_rx_state = AD_RX_INITIALIZE; 1086 else if (port->is_enabled 1087 && (port->sm_vars 1088 & AD_PORT_LACP_ENABLED)) 1089 port->sm_rx_state = AD_RX_EXPIRED; 1090 else if (port->is_enabled 1091 && ((port->sm_vars 1092 & AD_PORT_LACP_ENABLED) == 0)) 1093 port->sm_rx_state = AD_RX_LACP_DISABLED; 1094 break; 1095 default: 1096 break; 1097 1098 } 1099 } 1100 } 1101 1102 /* check if the State machine was changed or new lacpdu arrived */ 1103 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1104 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1105 port->actor_port_number, 1106 port->slave->dev->name, 1107 last_state, 1108 port->sm_rx_state); 1109 switch (port->sm_rx_state) { 1110 case AD_RX_INITIALIZE: 1111 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1112 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1113 else 1114 port->sm_vars |= AD_PORT_LACP_ENABLED; 1115 port->sm_vars &= ~AD_PORT_SELECTED; 1116 __record_default(port); 1117 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1118 port->sm_vars &= ~AD_PORT_MOVED; 1119 port->sm_rx_state = AD_RX_PORT_DISABLED; 1120 1121 /* Fall Through */ 1122 case AD_RX_PORT_DISABLED: 1123 port->sm_vars &= ~AD_PORT_MATCHED; 1124 break; 1125 case AD_RX_LACP_DISABLED: 1126 port->sm_vars &= ~AD_PORT_SELECTED; 1127 __record_default(port); 1128 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1129 port->sm_vars |= AD_PORT_MATCHED; 1130 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1131 break; 1132 case AD_RX_EXPIRED: 1133 /* Reset of the Synchronization flag (Standard 43.4.12) 1134 * This reset cause to disable this port in the 1135 * COLLECTING_DISTRIBUTING state of the mux machine in 1136 * case of EXPIRED even if LINK_DOWN didn't arrive for 1137 * the port. 1138 */ 1139 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1140 port->sm_vars &= ~AD_PORT_MATCHED; 1141 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1142 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1143 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1144 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1145 port->sm_vars |= AD_PORT_CHURNED; 1146 break; 1147 case AD_RX_DEFAULTED: 1148 __update_default_selected(port); 1149 __record_default(port); 1150 port->sm_vars |= AD_PORT_MATCHED; 1151 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1152 break; 1153 case AD_RX_CURRENT: 1154 /* detect loopback situation */ 1155 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1156 &(port->actor_system))) { 1157 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1158 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1159 port->slave->dev->name); 1160 return; 1161 } 1162 __update_selected(lacpdu, port); 1163 __update_ntt(lacpdu, port); 1164 __record_pdu(lacpdu, port); 1165 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1166 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1167 break; 1168 default: 1169 break; 1170 } 1171 } 1172 } 1173 1174 /** 1175 * ad_churn_machine - handle port churn's state machine 1176 * @port: the port we're looking at 1177 * 1178 */ 1179 static void ad_churn_machine(struct port *port) 1180 { 1181 if (port->sm_vars & AD_PORT_CHURNED) { 1182 port->sm_vars &= ~AD_PORT_CHURNED; 1183 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1184 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1185 port->sm_churn_actor_timer_counter = 1186 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1187 port->sm_churn_partner_timer_counter = 1188 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1189 return; 1190 } 1191 if (port->sm_churn_actor_timer_counter && 1192 !(--port->sm_churn_actor_timer_counter) && 1193 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1194 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1195 port->sm_churn_actor_state = AD_NO_CHURN; 1196 } else { 1197 port->churn_actor_count++; 1198 port->sm_churn_actor_state = AD_CHURN; 1199 } 1200 } 1201 if (port->sm_churn_partner_timer_counter && 1202 !(--port->sm_churn_partner_timer_counter) && 1203 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1204 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1205 port->sm_churn_partner_state = AD_NO_CHURN; 1206 } else { 1207 port->churn_partner_count++; 1208 port->sm_churn_partner_state = AD_CHURN; 1209 } 1210 } 1211 } 1212 1213 /** 1214 * ad_tx_machine - handle a port's tx state machine 1215 * @port: the port we're looking at 1216 */ 1217 static void ad_tx_machine(struct port *port) 1218 { 1219 /* check if tx timer expired, to verify that we do not send more than 1220 * 3 packets per second 1221 */ 1222 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1223 /* check if there is something to send */ 1224 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1225 __update_lacpdu_from_port(port); 1226 1227 if (ad_lacpdu_send(port) >= 0) { 1228 pr_debug("Sent LACPDU on port %d\n", 1229 port->actor_port_number); 1230 1231 /* mark ntt as false, so it will not be sent 1232 * again until demanded 1233 */ 1234 port->ntt = false; 1235 } 1236 } 1237 /* restart tx timer(to verify that we will not exceed 1238 * AD_MAX_TX_IN_SECOND 1239 */ 1240 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1241 } 1242 } 1243 1244 /** 1245 * ad_periodic_machine - handle a port's periodic state machine 1246 * @port: the port we're looking at 1247 * 1248 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1249 */ 1250 static void ad_periodic_machine(struct port *port) 1251 { 1252 periodic_states_t last_state; 1253 1254 /* keep current state machine state to compare later if it was changed */ 1255 last_state = port->sm_periodic_state; 1256 1257 /* check if port was reinitialized */ 1258 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1259 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1260 ) { 1261 port->sm_periodic_state = AD_NO_PERIODIC; 1262 } 1263 /* check if state machine should change state */ 1264 else if (port->sm_periodic_timer_counter) { 1265 /* check if periodic state machine expired */ 1266 if (!(--port->sm_periodic_timer_counter)) { 1267 /* if expired then do tx */ 1268 port->sm_periodic_state = AD_PERIODIC_TX; 1269 } else { 1270 /* If not expired, check if there is some new timeout 1271 * parameter from the partner state 1272 */ 1273 switch (port->sm_periodic_state) { 1274 case AD_FAST_PERIODIC: 1275 if (!(port->partner_oper.port_state 1276 & AD_STATE_LACP_TIMEOUT)) 1277 port->sm_periodic_state = AD_SLOW_PERIODIC; 1278 break; 1279 case AD_SLOW_PERIODIC: 1280 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1281 port->sm_periodic_timer_counter = 0; 1282 port->sm_periodic_state = AD_PERIODIC_TX; 1283 } 1284 break; 1285 default: 1286 break; 1287 } 1288 } 1289 } else { 1290 switch (port->sm_periodic_state) { 1291 case AD_NO_PERIODIC: 1292 port->sm_periodic_state = AD_FAST_PERIODIC; 1293 break; 1294 case AD_PERIODIC_TX: 1295 if (!(port->partner_oper.port_state & 1296 AD_STATE_LACP_TIMEOUT)) 1297 port->sm_periodic_state = AD_SLOW_PERIODIC; 1298 else 1299 port->sm_periodic_state = AD_FAST_PERIODIC; 1300 break; 1301 default: 1302 break; 1303 } 1304 } 1305 1306 /* check if the state machine was changed */ 1307 if (port->sm_periodic_state != last_state) { 1308 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1309 port->actor_port_number, last_state, 1310 port->sm_periodic_state); 1311 switch (port->sm_periodic_state) { 1312 case AD_NO_PERIODIC: 1313 port->sm_periodic_timer_counter = 0; 1314 break; 1315 case AD_FAST_PERIODIC: 1316 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1317 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1318 break; 1319 case AD_SLOW_PERIODIC: 1320 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1321 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1322 break; 1323 case AD_PERIODIC_TX: 1324 port->ntt = true; 1325 break; 1326 default: 1327 break; 1328 } 1329 } 1330 } 1331 1332 /** 1333 * ad_port_selection_logic - select aggregation groups 1334 * @port: the port we're looking at 1335 * @update_slave_arr: Does slave array need update? 1336 * 1337 * Select aggregation groups, and assign each port for it's aggregetor. The 1338 * selection logic is called in the inititalization (after all the handshkes), 1339 * and after every lacpdu receive (if selected is off). 1340 */ 1341 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1342 { 1343 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1344 struct port *last_port = NULL, *curr_port; 1345 struct list_head *iter; 1346 struct bonding *bond; 1347 struct slave *slave; 1348 int found = 0; 1349 1350 /* if the port is already Selected, do nothing */ 1351 if (port->sm_vars & AD_PORT_SELECTED) 1352 return; 1353 1354 bond = __get_bond_by_port(port); 1355 1356 /* if the port is connected to other aggregator, detach it */ 1357 if (port->aggregator) { 1358 /* detach the port from its former aggregator */ 1359 temp_aggregator = port->aggregator; 1360 for (curr_port = temp_aggregator->lag_ports; curr_port; 1361 last_port = curr_port, 1362 curr_port = curr_port->next_port_in_aggregator) { 1363 if (curr_port == port) { 1364 temp_aggregator->num_of_ports--; 1365 /* if it is the first port attached to the 1366 * aggregator 1367 */ 1368 if (!last_port) { 1369 temp_aggregator->lag_ports = 1370 port->next_port_in_aggregator; 1371 } else { 1372 /* not the first port attached to the 1373 * aggregator 1374 */ 1375 last_port->next_port_in_aggregator = 1376 port->next_port_in_aggregator; 1377 } 1378 1379 /* clear the port's relations to this 1380 * aggregator 1381 */ 1382 port->aggregator = NULL; 1383 port->next_port_in_aggregator = NULL; 1384 port->actor_port_aggregator_identifier = 0; 1385 1386 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1387 port->actor_port_number, 1388 temp_aggregator->aggregator_identifier); 1389 /* if the aggregator is empty, clear its 1390 * parameters, and set it ready to be attached 1391 */ 1392 if (!temp_aggregator->lag_ports) 1393 ad_clear_agg(temp_aggregator); 1394 break; 1395 } 1396 } 1397 if (!curr_port) { 1398 /* meaning: the port was related to an aggregator 1399 * but was not on the aggregator port list 1400 */ 1401 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1402 port->slave->bond->dev->name, 1403 port->actor_port_number, 1404 port->slave->dev->name, 1405 port->aggregator->aggregator_identifier); 1406 } 1407 } 1408 /* search on all aggregators for a suitable aggregator for this port */ 1409 bond_for_each_slave(bond, slave, iter) { 1410 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1411 1412 /* keep a free aggregator for later use(if needed) */ 1413 if (!aggregator->lag_ports) { 1414 if (!free_aggregator) 1415 free_aggregator = aggregator; 1416 continue; 1417 } 1418 /* check if current aggregator suits us */ 1419 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1420 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1421 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1422 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1423 ) && 1424 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1425 !aggregator->is_individual) /* but is not individual OR */ 1426 ) 1427 ) { 1428 /* attach to the founded aggregator */ 1429 port->aggregator = aggregator; 1430 port->actor_port_aggregator_identifier = 1431 port->aggregator->aggregator_identifier; 1432 port->next_port_in_aggregator = aggregator->lag_ports; 1433 port->aggregator->num_of_ports++; 1434 aggregator->lag_ports = port; 1435 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1436 port->actor_port_number, 1437 port->aggregator->aggregator_identifier); 1438 1439 /* mark this port as selected */ 1440 port->sm_vars |= AD_PORT_SELECTED; 1441 found = 1; 1442 break; 1443 } 1444 } 1445 1446 /* the port couldn't find an aggregator - attach it to a new 1447 * aggregator 1448 */ 1449 if (!found) { 1450 if (free_aggregator) { 1451 /* assign port a new aggregator */ 1452 port->aggregator = free_aggregator; 1453 port->actor_port_aggregator_identifier = 1454 port->aggregator->aggregator_identifier; 1455 1456 /* update the new aggregator's parameters 1457 * if port was responsed from the end-user 1458 */ 1459 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1460 /* if port is full duplex */ 1461 port->aggregator->is_individual = false; 1462 else 1463 port->aggregator->is_individual = true; 1464 1465 port->aggregator->actor_admin_aggregator_key = 1466 port->actor_admin_port_key; 1467 port->aggregator->actor_oper_aggregator_key = 1468 port->actor_oper_port_key; 1469 port->aggregator->partner_system = 1470 port->partner_oper.system; 1471 port->aggregator->partner_system_priority = 1472 port->partner_oper.system_priority; 1473 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1474 port->aggregator->receive_state = 1; 1475 port->aggregator->transmit_state = 1; 1476 port->aggregator->lag_ports = port; 1477 port->aggregator->num_of_ports++; 1478 1479 /* mark this port as selected */ 1480 port->sm_vars |= AD_PORT_SELECTED; 1481 1482 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1483 port->actor_port_number, 1484 port->aggregator->aggregator_identifier); 1485 } else { 1486 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1487 port->actor_port_number, port->slave->dev->name); 1488 } 1489 } 1490 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1491 * in all aggregator's ports, else set ready=FALSE in all 1492 * aggregator's ports 1493 */ 1494 __set_agg_ports_ready(port->aggregator, 1495 __agg_ports_are_ready(port->aggregator)); 1496 1497 aggregator = __get_first_agg(port); 1498 ad_agg_selection_logic(aggregator, update_slave_arr); 1499 1500 if (!port->aggregator->is_active) 1501 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1502 } 1503 1504 /* Decide if "agg" is a better choice for the new active aggregator that 1505 * the current best, according to the ad_select policy. 1506 */ 1507 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1508 struct aggregator *curr) 1509 { 1510 /* 0. If no best, select current. 1511 * 1512 * 1. If the current agg is not individual, and the best is 1513 * individual, select current. 1514 * 1515 * 2. If current agg is individual and the best is not, keep best. 1516 * 1517 * 3. Therefore, current and best are both individual or both not 1518 * individual, so: 1519 * 1520 * 3a. If current agg partner replied, and best agg partner did not, 1521 * select current. 1522 * 1523 * 3b. If current agg partner did not reply and best agg partner 1524 * did reply, keep best. 1525 * 1526 * 4. Therefore, current and best both have partner replies or 1527 * both do not, so perform selection policy: 1528 * 1529 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1530 * select by bandwidth. 1531 * 1532 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1533 */ 1534 if (!best) 1535 return curr; 1536 1537 if (!curr->is_individual && best->is_individual) 1538 return curr; 1539 1540 if (curr->is_individual && !best->is_individual) 1541 return best; 1542 1543 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1544 return curr; 1545 1546 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1547 return best; 1548 1549 switch (__get_agg_selection_mode(curr->lag_ports)) { 1550 case BOND_AD_COUNT: 1551 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1552 return curr; 1553 1554 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1555 return best; 1556 1557 /*FALLTHROUGH*/ 1558 case BOND_AD_STABLE: 1559 case BOND_AD_BANDWIDTH: 1560 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1561 return curr; 1562 1563 break; 1564 1565 default: 1566 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1567 curr->slave->bond->dev->name, 1568 __get_agg_selection_mode(curr->lag_ports)); 1569 break; 1570 } 1571 1572 return best; 1573 } 1574 1575 static int agg_device_up(const struct aggregator *agg) 1576 { 1577 struct port *port = agg->lag_ports; 1578 1579 if (!port) 1580 return 0; 1581 1582 for (port = agg->lag_ports; port; 1583 port = port->next_port_in_aggregator) { 1584 if (netif_running(port->slave->dev) && 1585 netif_carrier_ok(port->slave->dev)) 1586 return 1; 1587 } 1588 1589 return 0; 1590 } 1591 1592 /** 1593 * ad_agg_selection_logic - select an aggregation group for a team 1594 * @aggregator: the aggregator we're looking at 1595 * @update_slave_arr: Does slave array need update? 1596 * 1597 * It is assumed that only one aggregator may be selected for a team. 1598 * 1599 * The logic of this function is to select the aggregator according to 1600 * the ad_select policy: 1601 * 1602 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1603 * it, and to reselect the active aggregator only if the previous 1604 * aggregator has no more ports related to it. 1605 * 1606 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1607 * bandwidth, and reselect whenever a link state change takes place or the 1608 * set of slaves in the bond changes. 1609 * 1610 * BOND_AD_COUNT: select the aggregator with largest number of ports 1611 * (slaves), and reselect whenever a link state change takes place or the 1612 * set of slaves in the bond changes. 1613 * 1614 * FIXME: this function MUST be called with the first agg in the bond, or 1615 * __get_active_agg() won't work correctly. This function should be better 1616 * called with the bond itself, and retrieve the first agg from it. 1617 */ 1618 static void ad_agg_selection_logic(struct aggregator *agg, 1619 bool *update_slave_arr) 1620 { 1621 struct aggregator *best, *active, *origin; 1622 struct bonding *bond = agg->slave->bond; 1623 struct list_head *iter; 1624 struct slave *slave; 1625 struct port *port; 1626 1627 rcu_read_lock(); 1628 origin = agg; 1629 active = __get_active_agg(agg); 1630 best = (active && agg_device_up(active)) ? active : NULL; 1631 1632 bond_for_each_slave_rcu(bond, slave, iter) { 1633 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1634 1635 agg->is_active = 0; 1636 1637 if (__agg_active_ports(agg) && agg_device_up(agg)) 1638 best = ad_agg_selection_test(best, agg); 1639 } 1640 1641 if (best && 1642 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1643 /* For the STABLE policy, don't replace the old active 1644 * aggregator if it's still active (it has an answering 1645 * partner) or if both the best and active don't have an 1646 * answering partner. 1647 */ 1648 if (active && active->lag_ports && 1649 __agg_active_ports(active) && 1650 (__agg_has_partner(active) || 1651 (!__agg_has_partner(active) && 1652 !__agg_has_partner(best)))) { 1653 if (!(!active->actor_oper_aggregator_key && 1654 best->actor_oper_aggregator_key)) { 1655 best = NULL; 1656 active->is_active = 1; 1657 } 1658 } 1659 } 1660 1661 if (best && (best == active)) { 1662 best = NULL; 1663 active->is_active = 1; 1664 } 1665 1666 /* if there is new best aggregator, activate it */ 1667 if (best) { 1668 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1669 best->aggregator_identifier, best->num_of_ports, 1670 best->actor_oper_aggregator_key, 1671 best->partner_oper_aggregator_key, 1672 best->is_individual, best->is_active); 1673 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1674 best->lag_ports, best->slave, 1675 best->slave ? best->slave->dev->name : "NULL"); 1676 1677 bond_for_each_slave_rcu(bond, slave, iter) { 1678 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1679 1680 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1681 agg->aggregator_identifier, agg->num_of_ports, 1682 agg->actor_oper_aggregator_key, 1683 agg->partner_oper_aggregator_key, 1684 agg->is_individual, agg->is_active); 1685 } 1686 1687 /* check if any partner replys */ 1688 if (best->is_individual) { 1689 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1690 best->slave ? 1691 best->slave->bond->dev->name : "NULL"); 1692 } 1693 1694 best->is_active = 1; 1695 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1696 best->aggregator_identifier); 1697 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1698 best->aggregator_identifier, best->num_of_ports, 1699 best->actor_oper_aggregator_key, 1700 best->partner_oper_aggregator_key, 1701 best->is_individual, best->is_active); 1702 1703 /* disable the ports that were related to the former 1704 * active_aggregator 1705 */ 1706 if (active) { 1707 for (port = active->lag_ports; port; 1708 port = port->next_port_in_aggregator) { 1709 __disable_port(port); 1710 } 1711 } 1712 /* Slave array needs update. */ 1713 *update_slave_arr = true; 1714 } 1715 1716 /* if the selected aggregator is of join individuals 1717 * (partner_system is NULL), enable their ports 1718 */ 1719 active = __get_active_agg(origin); 1720 1721 if (active) { 1722 if (!__agg_has_partner(active)) { 1723 for (port = active->lag_ports; port; 1724 port = port->next_port_in_aggregator) { 1725 __enable_port(port); 1726 } 1727 } 1728 } 1729 1730 rcu_read_unlock(); 1731 1732 bond_3ad_set_carrier(bond); 1733 } 1734 1735 /** 1736 * ad_clear_agg - clear a given aggregator's parameters 1737 * @aggregator: the aggregator we're looking at 1738 */ 1739 static void ad_clear_agg(struct aggregator *aggregator) 1740 { 1741 if (aggregator) { 1742 aggregator->is_individual = false; 1743 aggregator->actor_admin_aggregator_key = 0; 1744 aggregator->actor_oper_aggregator_key = 0; 1745 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1746 aggregator->partner_system_priority = 0; 1747 aggregator->partner_oper_aggregator_key = 0; 1748 aggregator->receive_state = 0; 1749 aggregator->transmit_state = 0; 1750 aggregator->lag_ports = NULL; 1751 aggregator->is_active = 0; 1752 aggregator->num_of_ports = 0; 1753 pr_debug("LAG %d was cleared\n", 1754 aggregator->aggregator_identifier); 1755 } 1756 } 1757 1758 /** 1759 * ad_initialize_agg - initialize a given aggregator's parameters 1760 * @aggregator: the aggregator we're looking at 1761 */ 1762 static void ad_initialize_agg(struct aggregator *aggregator) 1763 { 1764 if (aggregator) { 1765 ad_clear_agg(aggregator); 1766 1767 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1768 aggregator->aggregator_identifier = 0; 1769 aggregator->slave = NULL; 1770 } 1771 } 1772 1773 /** 1774 * ad_initialize_port - initialize a given port's parameters 1775 * @aggregator: the aggregator we're looking at 1776 * @lacp_fast: boolean. whether fast periodic should be used 1777 */ 1778 static void ad_initialize_port(struct port *port, int lacp_fast) 1779 { 1780 static const struct port_params tmpl = { 1781 .system_priority = 0xffff, 1782 .key = 1, 1783 .port_number = 1, 1784 .port_priority = 0xff, 1785 .port_state = 1, 1786 }; 1787 static const struct lacpdu lacpdu = { 1788 .subtype = 0x01, 1789 .version_number = 0x01, 1790 .tlv_type_actor_info = 0x01, 1791 .actor_information_length = 0x14, 1792 .tlv_type_partner_info = 0x02, 1793 .partner_information_length = 0x14, 1794 .tlv_type_collector_info = 0x03, 1795 .collector_information_length = 0x10, 1796 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1797 }; 1798 1799 if (port) { 1800 port->actor_port_priority = 0xff; 1801 port->actor_port_aggregator_identifier = 0; 1802 port->ntt = false; 1803 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1804 AD_STATE_LACP_ACTIVITY; 1805 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1806 AD_STATE_LACP_ACTIVITY; 1807 1808 if (lacp_fast) 1809 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1810 1811 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1812 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1813 1814 port->is_enabled = true; 1815 /* private parameters */ 1816 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1817 port->sm_rx_state = 0; 1818 port->sm_rx_timer_counter = 0; 1819 port->sm_periodic_state = 0; 1820 port->sm_periodic_timer_counter = 0; 1821 port->sm_mux_state = 0; 1822 port->sm_mux_timer_counter = 0; 1823 port->sm_tx_state = 0; 1824 port->aggregator = NULL; 1825 port->next_port_in_aggregator = NULL; 1826 port->transaction_id = 0; 1827 1828 port->sm_churn_actor_timer_counter = 0; 1829 port->sm_churn_actor_state = 0; 1830 port->churn_actor_count = 0; 1831 port->sm_churn_partner_timer_counter = 0; 1832 port->sm_churn_partner_state = 0; 1833 port->churn_partner_count = 0; 1834 1835 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1836 } 1837 } 1838 1839 /** 1840 * ad_enable_collecting_distributing - enable a port's transmit/receive 1841 * @port: the port we're looking at 1842 * @update_slave_arr: Does slave array need update? 1843 * 1844 * Enable @port if it's in an active aggregator 1845 */ 1846 static void ad_enable_collecting_distributing(struct port *port, 1847 bool *update_slave_arr) 1848 { 1849 if (port->aggregator->is_active) { 1850 pr_debug("Enabling port %d(LAG %d)\n", 1851 port->actor_port_number, 1852 port->aggregator->aggregator_identifier); 1853 __enable_port(port); 1854 /* Slave array needs update */ 1855 *update_slave_arr = true; 1856 } 1857 } 1858 1859 /** 1860 * ad_disable_collecting_distributing - disable a port's transmit/receive 1861 * @port: the port we're looking at 1862 * @update_slave_arr: Does slave array need update? 1863 */ 1864 static void ad_disable_collecting_distributing(struct port *port, 1865 bool *update_slave_arr) 1866 { 1867 if (port->aggregator && 1868 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1869 &(null_mac_addr))) { 1870 pr_debug("Disabling port %d(LAG %d)\n", 1871 port->actor_port_number, 1872 port->aggregator->aggregator_identifier); 1873 __disable_port(port); 1874 /* Slave array needs an update */ 1875 *update_slave_arr = true; 1876 } 1877 } 1878 1879 /** 1880 * ad_marker_info_received - handle receive of a Marker information frame 1881 * @marker_info: Marker info received 1882 * @port: the port we're looking at 1883 */ 1884 static void ad_marker_info_received(struct bond_marker *marker_info, 1885 struct port *port) 1886 { 1887 struct bond_marker marker; 1888 1889 /* copy the received marker data to the response marker */ 1890 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1891 /* change the marker subtype to marker response */ 1892 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1893 1894 /* send the marker response */ 1895 if (ad_marker_send(port, &marker) >= 0) { 1896 pr_debug("Sent Marker Response on port %d\n", 1897 port->actor_port_number); 1898 } 1899 } 1900 1901 /** 1902 * ad_marker_response_received - handle receive of a marker response frame 1903 * @marker: marker PDU received 1904 * @port: the port we're looking at 1905 * 1906 * This function does nothing since we decided not to implement send and handle 1907 * response for marker PDU's, in this stage, but only to respond to marker 1908 * information. 1909 */ 1910 static void ad_marker_response_received(struct bond_marker *marker, 1911 struct port *port) 1912 { 1913 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1914 } 1915 1916 /* ========= AD exported functions to the main bonding code ========= */ 1917 1918 /* Check aggregators status in team every T seconds */ 1919 #define AD_AGGREGATOR_SELECTION_TIMER 8 1920 1921 /** 1922 * bond_3ad_initiate_agg_selection - initate aggregator selection 1923 * @bond: bonding struct 1924 * 1925 * Set the aggregation selection timer, to initiate an agg selection in 1926 * the very near future. Called during first initialization, and during 1927 * any down to up transitions of the bond. 1928 */ 1929 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1930 { 1931 BOND_AD_INFO(bond).agg_select_timer = timeout; 1932 } 1933 1934 /** 1935 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1936 * @bond: bonding struct to work on 1937 * @tick_resolution: tick duration (millisecond resolution) 1938 * 1939 * Can be called only after the mac address of the bond is set. 1940 */ 1941 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1942 { 1943 /* check that the bond is not initialized yet */ 1944 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1945 bond->dev->dev_addr)) { 1946 1947 BOND_AD_INFO(bond).aggregator_identifier = 0; 1948 1949 BOND_AD_INFO(bond).system.sys_priority = 1950 bond->params.ad_actor_sys_prio; 1951 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1952 BOND_AD_INFO(bond).system.sys_mac_addr = 1953 *((struct mac_addr *)bond->dev->dev_addr); 1954 else 1955 BOND_AD_INFO(bond).system.sys_mac_addr = 1956 *((struct mac_addr *)bond->params.ad_actor_system); 1957 1958 /* initialize how many times this module is called in one 1959 * second (should be about every 100ms) 1960 */ 1961 ad_ticks_per_sec = tick_resolution; 1962 1963 bond_3ad_initiate_agg_selection(bond, 1964 AD_AGGREGATOR_SELECTION_TIMER * 1965 ad_ticks_per_sec); 1966 } 1967 } 1968 1969 /** 1970 * bond_3ad_bind_slave - initialize a slave's port 1971 * @slave: slave struct to work on 1972 * 1973 * Returns: 0 on success 1974 * < 0 on error 1975 */ 1976 void bond_3ad_bind_slave(struct slave *slave) 1977 { 1978 struct bonding *bond = bond_get_bond_by_slave(slave); 1979 struct port *port; 1980 struct aggregator *aggregator; 1981 1982 /* check that the slave has not been initialized yet. */ 1983 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 1984 1985 /* port initialization */ 1986 port = &(SLAVE_AD_INFO(slave)->port); 1987 1988 ad_initialize_port(port, bond->params.lacp_fast); 1989 1990 port->slave = slave; 1991 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 1992 /* key is determined according to the link speed, duplex and 1993 * user key 1994 */ 1995 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 1996 ad_update_actor_keys(port, false); 1997 /* actor system is the bond's system */ 1998 __ad_actor_update_port(port); 1999 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2000 * lacpdu's are sent in one second) 2001 */ 2002 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2003 2004 __disable_port(port); 2005 2006 /* aggregator initialization */ 2007 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2008 2009 ad_initialize_agg(aggregator); 2010 2011 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2012 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2013 aggregator->slave = slave; 2014 aggregator->is_active = 0; 2015 aggregator->num_of_ports = 0; 2016 } 2017 } 2018 2019 /** 2020 * bond_3ad_unbind_slave - deinitialize a slave's port 2021 * @slave: slave struct to work on 2022 * 2023 * Search for the aggregator that is related to this port, remove the 2024 * aggregator and assign another aggregator for other port related to it 2025 * (if any), and remove the port. 2026 */ 2027 void bond_3ad_unbind_slave(struct slave *slave) 2028 { 2029 struct port *port, *prev_port, *temp_port; 2030 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2031 int select_new_active_agg = 0; 2032 struct bonding *bond = slave->bond; 2033 struct slave *slave_iter; 2034 struct list_head *iter; 2035 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2036 2037 /* Sync against bond_3ad_state_machine_handler() */ 2038 spin_lock_bh(&bond->mode_lock); 2039 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2040 port = &(SLAVE_AD_INFO(slave)->port); 2041 2042 /* if slave is null, the whole port is not initialized */ 2043 if (!port->slave) { 2044 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2045 slave->dev->name); 2046 goto out; 2047 } 2048 2049 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2050 aggregator->aggregator_identifier); 2051 2052 /* Tell the partner that this port is not suitable for aggregation */ 2053 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2054 __update_lacpdu_from_port(port); 2055 ad_lacpdu_send(port); 2056 2057 /* check if this aggregator is occupied */ 2058 if (aggregator->lag_ports) { 2059 /* check if there are other ports related to this aggregator 2060 * except the port related to this slave(thats ensure us that 2061 * there is a reason to search for new aggregator, and that we 2062 * will find one 2063 */ 2064 if ((aggregator->lag_ports != port) || 2065 (aggregator->lag_ports->next_port_in_aggregator)) { 2066 /* find new aggregator for the related port(s) */ 2067 bond_for_each_slave(bond, slave_iter, iter) { 2068 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2069 /* if the new aggregator is empty, or it is 2070 * connected to our port only 2071 */ 2072 if (!new_aggregator->lag_ports || 2073 ((new_aggregator->lag_ports == port) && 2074 !new_aggregator->lag_ports->next_port_in_aggregator)) 2075 break; 2076 } 2077 if (!slave_iter) 2078 new_aggregator = NULL; 2079 2080 /* if new aggregator found, copy the aggregator's 2081 * parameters and connect the related lag_ports to the 2082 * new aggregator 2083 */ 2084 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2085 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2086 aggregator->aggregator_identifier, 2087 new_aggregator->aggregator_identifier); 2088 2089 if ((new_aggregator->lag_ports == port) && 2090 new_aggregator->is_active) { 2091 netdev_info(bond->dev, "Removing an active aggregator\n"); 2092 select_new_active_agg = 1; 2093 } 2094 2095 new_aggregator->is_individual = aggregator->is_individual; 2096 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2097 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2098 new_aggregator->partner_system = aggregator->partner_system; 2099 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2100 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2101 new_aggregator->receive_state = aggregator->receive_state; 2102 new_aggregator->transmit_state = aggregator->transmit_state; 2103 new_aggregator->lag_ports = aggregator->lag_ports; 2104 new_aggregator->is_active = aggregator->is_active; 2105 new_aggregator->num_of_ports = aggregator->num_of_ports; 2106 2107 /* update the information that is written on 2108 * the ports about the aggregator 2109 */ 2110 for (temp_port = aggregator->lag_ports; temp_port; 2111 temp_port = temp_port->next_port_in_aggregator) { 2112 temp_port->aggregator = new_aggregator; 2113 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2114 } 2115 2116 ad_clear_agg(aggregator); 2117 2118 if (select_new_active_agg) 2119 ad_agg_selection_logic(__get_first_agg(port), 2120 &dummy_slave_update); 2121 } else { 2122 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2123 } 2124 } else { 2125 /* in case that the only port related to this 2126 * aggregator is the one we want to remove 2127 */ 2128 select_new_active_agg = aggregator->is_active; 2129 ad_clear_agg(aggregator); 2130 if (select_new_active_agg) { 2131 netdev_info(bond->dev, "Removing an active aggregator\n"); 2132 /* select new active aggregator */ 2133 temp_aggregator = __get_first_agg(port); 2134 if (temp_aggregator) 2135 ad_agg_selection_logic(temp_aggregator, 2136 &dummy_slave_update); 2137 } 2138 } 2139 } 2140 2141 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2142 2143 /* find the aggregator that this port is connected to */ 2144 bond_for_each_slave(bond, slave_iter, iter) { 2145 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2146 prev_port = NULL; 2147 /* search the port in the aggregator's related ports */ 2148 for (temp_port = temp_aggregator->lag_ports; temp_port; 2149 prev_port = temp_port, 2150 temp_port = temp_port->next_port_in_aggregator) { 2151 if (temp_port == port) { 2152 /* the aggregator found - detach the port from 2153 * this aggregator 2154 */ 2155 if (prev_port) 2156 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2157 else 2158 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2159 temp_aggregator->num_of_ports--; 2160 if (__agg_active_ports(temp_aggregator) == 0) { 2161 select_new_active_agg = temp_aggregator->is_active; 2162 ad_clear_agg(temp_aggregator); 2163 if (select_new_active_agg) { 2164 netdev_info(bond->dev, "Removing an active aggregator\n"); 2165 /* select new active aggregator */ 2166 ad_agg_selection_logic(__get_first_agg(port), 2167 &dummy_slave_update); 2168 } 2169 } 2170 break; 2171 } 2172 } 2173 } 2174 port->slave = NULL; 2175 2176 out: 2177 spin_unlock_bh(&bond->mode_lock); 2178 } 2179 2180 /** 2181 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2182 * @bond: bonding struct to work on 2183 * 2184 * If an ad_actor setting gets changed we need to update the individual port 2185 * settings so the bond device will use the new values when it gets upped. 2186 */ 2187 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2188 { 2189 struct list_head *iter; 2190 struct slave *slave; 2191 2192 ASSERT_RTNL(); 2193 2194 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2195 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2196 BOND_AD_INFO(bond).system.sys_mac_addr = 2197 *((struct mac_addr *)bond->dev->dev_addr); 2198 else 2199 BOND_AD_INFO(bond).system.sys_mac_addr = 2200 *((struct mac_addr *)bond->params.ad_actor_system); 2201 2202 spin_lock_bh(&bond->mode_lock); 2203 bond_for_each_slave(bond, slave, iter) { 2204 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2205 2206 __ad_actor_update_port(port); 2207 port->ntt = true; 2208 } 2209 spin_unlock_bh(&bond->mode_lock); 2210 } 2211 2212 /** 2213 * bond_3ad_state_machine_handler - handle state machines timeout 2214 * @bond: bonding struct to work on 2215 * 2216 * The state machine handling concept in this module is to check every tick 2217 * which state machine should operate any function. The execution order is 2218 * round robin, so when we have an interaction between state machines, the 2219 * reply of one to each other might be delayed until next tick. 2220 * 2221 * This function also complete the initialization when the agg_select_timer 2222 * times out, and it selects an aggregator for the ports that are yet not 2223 * related to any aggregator, and selects the active aggregator for a bond. 2224 */ 2225 void bond_3ad_state_machine_handler(struct work_struct *work) 2226 { 2227 struct bonding *bond = container_of(work, struct bonding, 2228 ad_work.work); 2229 struct aggregator *aggregator; 2230 struct list_head *iter; 2231 struct slave *slave; 2232 struct port *port; 2233 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2234 bool update_slave_arr = false; 2235 2236 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2237 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2238 * concurrently due to incoming LACPDU as well. 2239 */ 2240 spin_lock_bh(&bond->mode_lock); 2241 rcu_read_lock(); 2242 2243 /* check if there are any slaves */ 2244 if (!bond_has_slaves(bond)) 2245 goto re_arm; 2246 2247 /* check if agg_select_timer timer after initialize is timed out */ 2248 if (BOND_AD_INFO(bond).agg_select_timer && 2249 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2250 slave = bond_first_slave_rcu(bond); 2251 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2252 2253 /* select the active aggregator for the bond */ 2254 if (port) { 2255 if (!port->slave) { 2256 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2257 bond->dev->name); 2258 goto re_arm; 2259 } 2260 2261 aggregator = __get_first_agg(port); 2262 ad_agg_selection_logic(aggregator, &update_slave_arr); 2263 } 2264 bond_3ad_set_carrier(bond); 2265 } 2266 2267 /* for each port run the state machines */ 2268 bond_for_each_slave_rcu(bond, slave, iter) { 2269 port = &(SLAVE_AD_INFO(slave)->port); 2270 if (!port->slave) { 2271 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2272 bond->dev->name); 2273 goto re_arm; 2274 } 2275 2276 ad_rx_machine(NULL, port); 2277 ad_periodic_machine(port); 2278 ad_port_selection_logic(port, &update_slave_arr); 2279 ad_mux_machine(port, &update_slave_arr); 2280 ad_tx_machine(port); 2281 ad_churn_machine(port); 2282 2283 /* turn off the BEGIN bit, since we already handled it */ 2284 if (port->sm_vars & AD_PORT_BEGIN) 2285 port->sm_vars &= ~AD_PORT_BEGIN; 2286 } 2287 2288 re_arm: 2289 bond_for_each_slave_rcu(bond, slave, iter) { 2290 if (slave->should_notify) { 2291 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2292 break; 2293 } 2294 } 2295 rcu_read_unlock(); 2296 spin_unlock_bh(&bond->mode_lock); 2297 2298 if (update_slave_arr) 2299 bond_slave_arr_work_rearm(bond, 0); 2300 2301 if (should_notify_rtnl && rtnl_trylock()) { 2302 bond_slave_state_notify(bond); 2303 rtnl_unlock(); 2304 } 2305 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2306 } 2307 2308 /** 2309 * bond_3ad_rx_indication - handle a received frame 2310 * @lacpdu: received lacpdu 2311 * @slave: slave struct to work on 2312 * @length: length of the data received 2313 * 2314 * It is assumed that frames that were sent on this NIC don't returned as new 2315 * received frames (loopback). Since only the payload is given to this 2316 * function, it check for loopback. 2317 */ 2318 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2319 u16 length) 2320 { 2321 struct port *port; 2322 int ret = RX_HANDLER_ANOTHER; 2323 2324 if (length >= sizeof(struct lacpdu)) { 2325 2326 port = &(SLAVE_AD_INFO(slave)->port); 2327 2328 if (!port->slave) { 2329 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2330 slave->dev->name, slave->bond->dev->name); 2331 return ret; 2332 } 2333 2334 switch (lacpdu->subtype) { 2335 case AD_TYPE_LACPDU: 2336 ret = RX_HANDLER_CONSUMED; 2337 netdev_dbg(slave->bond->dev, 2338 "Received LACPDU on port %d slave %s\n", 2339 port->actor_port_number, 2340 slave->dev->name); 2341 /* Protect against concurrent state machines */ 2342 spin_lock(&slave->bond->mode_lock); 2343 ad_rx_machine(lacpdu, port); 2344 spin_unlock(&slave->bond->mode_lock); 2345 break; 2346 2347 case AD_TYPE_MARKER: 2348 ret = RX_HANDLER_CONSUMED; 2349 /* No need to convert fields to Little Endian since we 2350 * don't use the marker's fields. 2351 */ 2352 2353 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2354 case AD_MARKER_INFORMATION_SUBTYPE: 2355 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2356 port->actor_port_number); 2357 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2358 break; 2359 2360 case AD_MARKER_RESPONSE_SUBTYPE: 2361 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2362 port->actor_port_number); 2363 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2364 break; 2365 2366 default: 2367 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2368 port->actor_port_number); 2369 } 2370 } 2371 } 2372 return ret; 2373 } 2374 2375 /** 2376 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2377 * its current speed and duplex settings. 2378 * 2379 * @port: the port we'are looking at 2380 * @reset: Boolean to just reset the speed and the duplex part of the key 2381 * 2382 * The logic to change the oper / admin keys is: 2383 * (a) A full duplex port can participate in LACP with partner. 2384 * (b) When the speed is changed, LACP need to be reinitiated. 2385 */ 2386 static void ad_update_actor_keys(struct port *port, bool reset) 2387 { 2388 u8 duplex = 0; 2389 u16 ospeed = 0, speed = 0; 2390 u16 old_oper_key = port->actor_oper_port_key; 2391 2392 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2393 if (!reset) { 2394 speed = __get_link_speed(port); 2395 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2396 duplex = __get_duplex(port); 2397 port->actor_admin_port_key |= (speed << 1) | duplex; 2398 } 2399 port->actor_oper_port_key = port->actor_admin_port_key; 2400 2401 if (old_oper_key != port->actor_oper_port_key) { 2402 /* Only 'duplex' port participates in LACP */ 2403 if (duplex) 2404 port->sm_vars |= AD_PORT_LACP_ENABLED; 2405 else 2406 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2407 2408 if (!reset) { 2409 if (!speed) { 2410 netdev_err(port->slave->dev, 2411 "speed changed to 0 for port %s", 2412 port->slave->dev->name); 2413 } else if (duplex && ospeed != speed) { 2414 /* Speed change restarts LACP state-machine */ 2415 port->sm_vars |= AD_PORT_BEGIN; 2416 } 2417 } 2418 } 2419 } 2420 2421 /** 2422 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2423 * change indication 2424 * 2425 * @slave: slave struct to work on 2426 * 2427 * Handle reselection of aggregator (if needed) for this port. 2428 */ 2429 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2430 { 2431 struct port *port; 2432 2433 port = &(SLAVE_AD_INFO(slave)->port); 2434 2435 /* if slave is null, the whole port is not initialized */ 2436 if (!port->slave) { 2437 netdev_warn(slave->bond->dev, 2438 "speed/duplex changed for uninitialized port %s\n", 2439 slave->dev->name); 2440 return; 2441 } 2442 2443 spin_lock_bh(&slave->bond->mode_lock); 2444 ad_update_actor_keys(port, false); 2445 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", 2446 port->actor_port_number, slave->dev->name); 2447 spin_unlock_bh(&slave->bond->mode_lock); 2448 } 2449 2450 /** 2451 * bond_3ad_handle_link_change - handle a slave's link status change indication 2452 * @slave: slave struct to work on 2453 * @status: whether the link is now up or down 2454 * 2455 * Handle reselection of aggregator (if needed) for this port. 2456 */ 2457 void bond_3ad_handle_link_change(struct slave *slave, char link) 2458 { 2459 struct aggregator *agg; 2460 struct port *port; 2461 bool dummy; 2462 2463 port = &(SLAVE_AD_INFO(slave)->port); 2464 2465 /* if slave is null, the whole port is not initialized */ 2466 if (!port->slave) { 2467 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2468 slave->dev->name); 2469 return; 2470 } 2471 2472 spin_lock_bh(&slave->bond->mode_lock); 2473 /* on link down we are zeroing duplex and speed since 2474 * some of the adaptors(ce1000.lan) report full duplex/speed 2475 * instead of N/A(duplex) / 0(speed). 2476 * 2477 * on link up we are forcing recheck on the duplex and speed since 2478 * some of he adaptors(ce1000.lan) report. 2479 */ 2480 if (link == BOND_LINK_UP) { 2481 port->is_enabled = true; 2482 ad_update_actor_keys(port, false); 2483 } else { 2484 /* link has failed */ 2485 port->is_enabled = false; 2486 ad_update_actor_keys(port, true); 2487 } 2488 agg = __get_first_agg(port); 2489 ad_agg_selection_logic(agg, &dummy); 2490 2491 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2492 port->actor_port_number, 2493 link == BOND_LINK_UP ? "UP" : "DOWN"); 2494 2495 spin_unlock_bh(&slave->bond->mode_lock); 2496 2497 /* RTNL is held and mode_lock is released so it's safe 2498 * to update slave_array here. 2499 */ 2500 bond_update_slave_arr(slave->bond, NULL); 2501 } 2502 2503 /** 2504 * bond_3ad_set_carrier - set link state for bonding master 2505 * @bond - bonding structure 2506 * 2507 * if we have an active aggregator, we're up, if not, we're down. 2508 * Presumes that we cannot have an active aggregator if there are 2509 * no slaves with link up. 2510 * 2511 * This behavior complies with IEEE 802.3 section 43.3.9. 2512 * 2513 * Called by bond_set_carrier(). Return zero if carrier state does not 2514 * change, nonzero if it does. 2515 */ 2516 int bond_3ad_set_carrier(struct bonding *bond) 2517 { 2518 struct aggregator *active; 2519 struct slave *first_slave; 2520 int ret = 1; 2521 2522 rcu_read_lock(); 2523 first_slave = bond_first_slave_rcu(bond); 2524 if (!first_slave) { 2525 ret = 0; 2526 goto out; 2527 } 2528 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2529 if (active) { 2530 /* are enough slaves available to consider link up? */ 2531 if (__agg_active_ports(active) < bond->params.min_links) { 2532 if (netif_carrier_ok(bond->dev)) { 2533 netif_carrier_off(bond->dev); 2534 goto out; 2535 } 2536 } else if (!netif_carrier_ok(bond->dev)) { 2537 netif_carrier_on(bond->dev); 2538 goto out; 2539 } 2540 } else if (netif_carrier_ok(bond->dev)) { 2541 netif_carrier_off(bond->dev); 2542 } 2543 out: 2544 rcu_read_unlock(); 2545 return ret; 2546 } 2547 2548 /** 2549 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2550 * @bond: bonding struct to work on 2551 * @ad_info: ad_info struct to fill with the bond's info 2552 * 2553 * Returns: 0 on success 2554 * < 0 on error 2555 */ 2556 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2557 struct ad_info *ad_info) 2558 { 2559 struct aggregator *aggregator = NULL; 2560 struct list_head *iter; 2561 struct slave *slave; 2562 struct port *port; 2563 2564 bond_for_each_slave_rcu(bond, slave, iter) { 2565 port = &(SLAVE_AD_INFO(slave)->port); 2566 if (port->aggregator && port->aggregator->is_active) { 2567 aggregator = port->aggregator; 2568 break; 2569 } 2570 } 2571 2572 if (!aggregator) 2573 return -1; 2574 2575 ad_info->aggregator_id = aggregator->aggregator_identifier; 2576 ad_info->ports = aggregator->num_of_ports; 2577 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2578 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2579 ether_addr_copy(ad_info->partner_system, 2580 aggregator->partner_system.mac_addr_value); 2581 return 0; 2582 } 2583 2584 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2585 { 2586 int ret; 2587 2588 rcu_read_lock(); 2589 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2590 rcu_read_unlock(); 2591 2592 return ret; 2593 } 2594 2595 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2596 struct slave *slave) 2597 { 2598 struct lacpdu *lacpdu, _lacpdu; 2599 2600 if (skb->protocol != PKT_TYPE_LACPDU) 2601 return RX_HANDLER_ANOTHER; 2602 2603 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2604 return RX_HANDLER_ANOTHER; 2605 2606 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2607 if (!lacpdu) 2608 return RX_HANDLER_ANOTHER; 2609 2610 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2611 } 2612 2613 /** 2614 * bond_3ad_update_lacp_rate - change the lacp rate 2615 * @bond - bonding struct 2616 * 2617 * When modify lacp_rate parameter via sysfs, 2618 * update actor_oper_port_state of each port. 2619 * 2620 * Hold bond->mode_lock, 2621 * so we can modify port->actor_oper_port_state, 2622 * no matter bond is up or down. 2623 */ 2624 void bond_3ad_update_lacp_rate(struct bonding *bond) 2625 { 2626 struct port *port = NULL; 2627 struct list_head *iter; 2628 struct slave *slave; 2629 int lacp_fast; 2630 2631 lacp_fast = bond->params.lacp_fast; 2632 spin_lock_bh(&bond->mode_lock); 2633 bond_for_each_slave(bond, slave, iter) { 2634 port = &(SLAVE_AD_INFO(slave)->port); 2635 if (lacp_fast) 2636 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2637 else 2638 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2639 } 2640 spin_unlock_bh(&bond->mode_lock); 2641 } 2642