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_25000MBPS, 96 AD_LINK_SPEED_40000MBPS, 97 AD_LINK_SPEED_56000MBPS, 98 AD_LINK_SPEED_100000MBPS, 99 }; 100 101 /* compare MAC addresses */ 102 #define MAC_ADDRESS_EQUAL(A, B) \ 103 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 104 105 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 106 0, 0, 0, 0, 0, 0 107 }; 108 static u16 ad_ticks_per_sec; 109 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 110 111 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = 112 MULTICAST_LACPDU_ADDR; 113 114 /* ================= main 802.3ad protocol functions ================== */ 115 static int ad_lacpdu_send(struct port *port); 116 static int ad_marker_send(struct port *port, struct bond_marker *marker); 117 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 118 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 119 static void ad_tx_machine(struct port *port); 120 static void ad_periodic_machine(struct port *port); 121 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 122 static void ad_agg_selection_logic(struct aggregator *aggregator, 123 bool *update_slave_arr); 124 static void ad_clear_agg(struct aggregator *aggregator); 125 static void ad_initialize_agg(struct aggregator *aggregator); 126 static void ad_initialize_port(struct port *port, int lacp_fast); 127 static void ad_enable_collecting_distributing(struct port *port, 128 bool *update_slave_arr); 129 static void ad_disable_collecting_distributing(struct port *port, 130 bool *update_slave_arr); 131 static void ad_marker_info_received(struct bond_marker *marker_info, 132 struct port *port); 133 static void ad_marker_response_received(struct bond_marker *marker, 134 struct port *port); 135 static void ad_update_actor_keys(struct port *port, bool reset); 136 137 138 /* ================= api to bonding and kernel code ================== */ 139 140 /** 141 * __get_bond_by_port - get the port's bonding struct 142 * @port: the port we're looking at 143 * 144 * Return @port's bonding struct, or %NULL if it can't be found. 145 */ 146 static inline struct bonding *__get_bond_by_port(struct port *port) 147 { 148 if (port->slave == NULL) 149 return NULL; 150 151 return bond_get_bond_by_slave(port->slave); 152 } 153 154 /** 155 * __get_first_agg - get the first aggregator in the bond 156 * @bond: the bond we're looking at 157 * 158 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 159 * found. 160 * The caller must hold RCU or RTNL lock. 161 */ 162 static inline struct aggregator *__get_first_agg(struct port *port) 163 { 164 struct bonding *bond = __get_bond_by_port(port); 165 struct slave *first_slave; 166 struct aggregator *agg; 167 168 /* If there's no bond for this port, or bond has no slaves */ 169 if (bond == NULL) 170 return NULL; 171 172 rcu_read_lock(); 173 first_slave = bond_first_slave_rcu(bond); 174 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 175 rcu_read_unlock(); 176 177 return agg; 178 } 179 180 /** 181 * __agg_has_partner - see if we have a partner 182 * @agg: the agregator we're looking at 183 * 184 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 185 * address for the partner). Return 0 if not. 186 */ 187 static inline int __agg_has_partner(struct aggregator *agg) 188 { 189 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 190 } 191 192 /** 193 * __disable_port - disable the port's slave 194 * @port: the port we're looking at 195 */ 196 static inline void __disable_port(struct port *port) 197 { 198 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 199 } 200 201 /** 202 * __enable_port - enable the port's slave, if it's up 203 * @port: the port we're looking at 204 */ 205 static inline void __enable_port(struct port *port) 206 { 207 struct slave *slave = port->slave; 208 209 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 210 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 211 } 212 213 /** 214 * __port_is_enabled - check if the port's slave is in active state 215 * @port: the port we're looking at 216 */ 217 static inline int __port_is_enabled(struct port *port) 218 { 219 return bond_is_active_slave(port->slave); 220 } 221 222 /** 223 * __get_agg_selection_mode - get the aggregator selection mode 224 * @port: the port we're looking at 225 * 226 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 227 */ 228 static inline u32 __get_agg_selection_mode(struct port *port) 229 { 230 struct bonding *bond = __get_bond_by_port(port); 231 232 if (bond == NULL) 233 return BOND_AD_STABLE; 234 235 return bond->params.ad_select; 236 } 237 238 /** 239 * __check_agg_selection_timer - check if the selection timer has expired 240 * @port: the port we're looking at 241 */ 242 static inline int __check_agg_selection_timer(struct port *port) 243 { 244 struct bonding *bond = __get_bond_by_port(port); 245 246 if (bond == NULL) 247 return 0; 248 249 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 250 } 251 252 /** 253 * __get_link_speed - get a port's speed 254 * @port: the port we're looking at 255 * 256 * Return @port's speed in 802.3ad enum format. i.e. one of: 257 * 0, 258 * %AD_LINK_SPEED_10MBPS, 259 * %AD_LINK_SPEED_100MBPS, 260 * %AD_LINK_SPEED_1000MBPS, 261 * %AD_LINK_SPEED_2500MBPS, 262 * %AD_LINK_SPEED_10000MBPS 263 * %AD_LINK_SPEED_20000MBPS 264 * %AD_LINK_SPEED_25000MBPS 265 * %AD_LINK_SPEED_40000MBPS 266 * %AD_LINK_SPEED_56000MBPS 267 * %AD_LINK_SPEED_100000MBPS 268 */ 269 static u16 __get_link_speed(struct port *port) 270 { 271 struct slave *slave = port->slave; 272 u16 speed; 273 274 /* this if covers only a special case: when the configuration starts 275 * with link down, it sets the speed to 0. 276 * This is done in spite of the fact that the e100 driver reports 0 277 * to be compatible with MVT in the future. 278 */ 279 if (slave->link != BOND_LINK_UP) 280 speed = 0; 281 else { 282 switch (slave->speed) { 283 case SPEED_10: 284 speed = AD_LINK_SPEED_10MBPS; 285 break; 286 287 case SPEED_100: 288 speed = AD_LINK_SPEED_100MBPS; 289 break; 290 291 case SPEED_1000: 292 speed = AD_LINK_SPEED_1000MBPS; 293 break; 294 295 case SPEED_2500: 296 speed = AD_LINK_SPEED_2500MBPS; 297 break; 298 299 case SPEED_10000: 300 speed = AD_LINK_SPEED_10000MBPS; 301 break; 302 303 case SPEED_20000: 304 speed = AD_LINK_SPEED_20000MBPS; 305 break; 306 307 case SPEED_25000: 308 speed = AD_LINK_SPEED_25000MBPS; 309 break; 310 311 case SPEED_40000: 312 speed = AD_LINK_SPEED_40000MBPS; 313 break; 314 315 case SPEED_56000: 316 speed = AD_LINK_SPEED_56000MBPS; 317 break; 318 319 case SPEED_100000: 320 speed = AD_LINK_SPEED_100000MBPS; 321 break; 322 323 default: 324 /* unknown speed value from ethtool. shouldn't happen */ 325 speed = 0; 326 break; 327 } 328 } 329 330 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 331 port->actor_port_number, speed); 332 return speed; 333 } 334 335 /** 336 * __get_duplex - get a port's duplex 337 * @port: the port we're looking at 338 * 339 * Return @port's duplex in 802.3ad bitmask format. i.e.: 340 * 0x01 if in full duplex 341 * 0x00 otherwise 342 */ 343 static u8 __get_duplex(struct port *port) 344 { 345 struct slave *slave = port->slave; 346 u8 retval = 0x0; 347 348 /* handling a special case: when the configuration starts with 349 * link down, it sets the duplex to 0. 350 */ 351 if (slave->link == BOND_LINK_UP) { 352 switch (slave->duplex) { 353 case DUPLEX_FULL: 354 retval = 0x1; 355 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 356 port->actor_port_number); 357 break; 358 case DUPLEX_HALF: 359 default: 360 retval = 0x0; 361 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 362 port->actor_port_number); 363 break; 364 } 365 } 366 return retval; 367 } 368 369 static void __ad_actor_update_port(struct port *port) 370 { 371 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 372 373 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 374 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 375 } 376 377 /* Conversions */ 378 379 /** 380 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 381 * @timer_type: which timer to operate 382 * @par: timer parameter. see below 383 * 384 * If @timer_type is %current_while_timer, @par indicates long/short timer. 385 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 386 * %SLOW_PERIODIC_TIME. 387 */ 388 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 389 { 390 u16 retval = 0; /* to silence the compiler */ 391 392 switch (timer_type) { 393 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 394 if (par) 395 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 396 else 397 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 398 break; 399 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 400 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 401 break; 402 case AD_PERIODIC_TIMER: /* for periodic machine */ 403 retval = (par*ad_ticks_per_sec); /* long timeout */ 404 break; 405 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 406 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 407 break; 408 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 409 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 410 break; 411 } 412 413 return retval; 414 } 415 416 417 /* ================= ad_rx_machine helper functions ================== */ 418 419 /** 420 * __choose_matched - update a port's matched variable from a received lacpdu 421 * @lacpdu: the lacpdu we've received 422 * @port: the port we're looking at 423 * 424 * Update the value of the matched variable, using parameter values from a 425 * newly received lacpdu. Parameter values for the partner carried in the 426 * received PDU are compared with the corresponding operational parameter 427 * values for the actor. Matched is set to TRUE if all of these parameters 428 * match and the PDU parameter partner_state.aggregation has the same value as 429 * actor_oper_port_state.aggregation and lacp will actively maintain the link 430 * in the aggregation. Matched is also set to TRUE if the value of 431 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 432 * an individual link and lacp will actively maintain the link. Otherwise, 433 * matched is set to FALSE. LACP is considered to be actively maintaining the 434 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 435 * the actor's actor_oper_port_state.lacp_activity and the PDU's 436 * partner_state.lacp_activity variables are TRUE. 437 * 438 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 439 * used here to implement the language from 802.3ad 43.4.9 that requires 440 * recordPDU to "match" the LACPDU parameters to the stored values. 441 */ 442 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 443 { 444 /* check if all parameters are alike 445 * or this is individual link(aggregation == FALSE) 446 * then update the state machine Matched variable. 447 */ 448 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 449 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 450 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 451 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 452 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 453 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 454 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 455 ) { 456 port->sm_vars |= AD_PORT_MATCHED; 457 } else { 458 port->sm_vars &= ~AD_PORT_MATCHED; 459 } 460 } 461 462 /** 463 * __record_pdu - record parameters from a received lacpdu 464 * @lacpdu: the lacpdu we've received 465 * @port: the port we're looking at 466 * 467 * Record the parameter values for the Actor carried in a received lacpdu as 468 * the current partner operational parameter values and sets 469 * actor_oper_port_state.defaulted to FALSE. 470 */ 471 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 472 { 473 if (lacpdu && port) { 474 struct port_params *partner = &port->partner_oper; 475 476 __choose_matched(lacpdu, port); 477 /* record the new parameter values for the partner 478 * operational 479 */ 480 partner->port_number = ntohs(lacpdu->actor_port); 481 partner->port_priority = ntohs(lacpdu->actor_port_priority); 482 partner->system = lacpdu->actor_system; 483 partner->system_priority = ntohs(lacpdu->actor_system_priority); 484 partner->key = ntohs(lacpdu->actor_key); 485 partner->port_state = lacpdu->actor_state; 486 487 /* set actor_oper_port_state.defaulted to FALSE */ 488 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 489 490 /* set the partner sync. to on if the partner is sync, 491 * and the port is matched 492 */ 493 if ((port->sm_vars & AD_PORT_MATCHED) && 494 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 495 partner->port_state |= AD_STATE_SYNCHRONIZATION; 496 pr_debug("%s partner sync=1\n", port->slave->dev->name); 497 } else { 498 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 499 pr_debug("%s partner sync=0\n", port->slave->dev->name); 500 } 501 } 502 } 503 504 /** 505 * __record_default - record default parameters 506 * @port: the port we're looking at 507 * 508 * This function records the default parameter values for the partner carried 509 * in the Partner Admin parameters as the current partner operational parameter 510 * values and sets actor_oper_port_state.defaulted to TRUE. 511 */ 512 static void __record_default(struct port *port) 513 { 514 if (port) { 515 /* record the partner admin parameters */ 516 memcpy(&port->partner_oper, &port->partner_admin, 517 sizeof(struct port_params)); 518 519 /* set actor_oper_port_state.defaulted to true */ 520 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 521 } 522 } 523 524 /** 525 * __update_selected - update a port's Selected variable from a received lacpdu 526 * @lacpdu: the lacpdu we've received 527 * @port: the port we're looking at 528 * 529 * Update the value of the selected variable, using parameter values from a 530 * newly received lacpdu. The parameter values for the Actor carried in the 531 * received PDU are compared with the corresponding operational parameter 532 * values for the ports partner. If one or more of the comparisons shows that 533 * the value(s) received in the PDU differ from the current operational values, 534 * then selected is set to FALSE and actor_oper_port_state.synchronization is 535 * set to out_of_sync. Otherwise, selected remains unchanged. 536 */ 537 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 538 { 539 if (lacpdu && port) { 540 const struct port_params *partner = &port->partner_oper; 541 542 /* check if any parameter is different then 543 * update the state machine selected variable. 544 */ 545 if (ntohs(lacpdu->actor_port) != partner->port_number || 546 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 547 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 548 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 549 ntohs(lacpdu->actor_key) != partner->key || 550 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 551 port->sm_vars &= ~AD_PORT_SELECTED; 552 } 553 } 554 } 555 556 /** 557 * __update_default_selected - update a port's Selected variable from Partner 558 * @port: the port we're looking at 559 * 560 * This function updates the value of the selected variable, using the partner 561 * administrative parameter values. The administrative values are compared with 562 * the corresponding operational parameter values for the partner. If one or 563 * more of the comparisons shows that the administrative value(s) differ from 564 * the current operational values, then Selected is set to FALSE and 565 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 566 * Selected remains unchanged. 567 */ 568 static void __update_default_selected(struct port *port) 569 { 570 if (port) { 571 const struct port_params *admin = &port->partner_admin; 572 const struct port_params *oper = &port->partner_oper; 573 574 /* check if any parameter is different then 575 * update the state machine selected variable. 576 */ 577 if (admin->port_number != oper->port_number || 578 admin->port_priority != oper->port_priority || 579 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 580 admin->system_priority != oper->system_priority || 581 admin->key != oper->key || 582 (admin->port_state & AD_STATE_AGGREGATION) 583 != (oper->port_state & AD_STATE_AGGREGATION)) { 584 port->sm_vars &= ~AD_PORT_SELECTED; 585 } 586 } 587 } 588 589 /** 590 * __update_ntt - update a port's ntt variable from a received lacpdu 591 * @lacpdu: the lacpdu we've received 592 * @port: the port we're looking at 593 * 594 * Updates the value of the ntt variable, using parameter values from a newly 595 * received lacpdu. The parameter values for the partner carried in the 596 * received PDU are compared with the corresponding operational parameter 597 * values for the Actor. If one or more of the comparisons shows that the 598 * value(s) received in the PDU differ from the current operational values, 599 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 600 */ 601 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 602 { 603 /* validate lacpdu and port */ 604 if (lacpdu && port) { 605 /* check if any parameter is different then 606 * update the port->ntt. 607 */ 608 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 609 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 610 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 611 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 612 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 613 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 614 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 615 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 616 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 617 ) { 618 port->ntt = true; 619 } 620 } 621 } 622 623 /** 624 * __agg_ports_are_ready - check if all ports in an aggregator are ready 625 * @aggregator: the aggregator we're looking at 626 * 627 */ 628 static int __agg_ports_are_ready(struct aggregator *aggregator) 629 { 630 struct port *port; 631 int retval = 1; 632 633 if (aggregator) { 634 /* scan all ports in this aggregator to verfy if they are 635 * all ready. 636 */ 637 for (port = aggregator->lag_ports; 638 port; 639 port = port->next_port_in_aggregator) { 640 if (!(port->sm_vars & AD_PORT_READY_N)) { 641 retval = 0; 642 break; 643 } 644 } 645 } 646 647 return retval; 648 } 649 650 /** 651 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 652 * @aggregator: the aggregator we're looking at 653 * @val: Should the ports' ready bit be set on or off 654 * 655 */ 656 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 657 { 658 struct port *port; 659 660 for (port = aggregator->lag_ports; port; 661 port = port->next_port_in_aggregator) { 662 if (val) 663 port->sm_vars |= AD_PORT_READY; 664 else 665 port->sm_vars &= ~AD_PORT_READY; 666 } 667 } 668 669 static int __agg_active_ports(struct aggregator *agg) 670 { 671 struct port *port; 672 int active = 0; 673 674 for (port = agg->lag_ports; port; 675 port = port->next_port_in_aggregator) { 676 if (port->is_enabled) 677 active++; 678 } 679 680 return active; 681 } 682 683 /** 684 * __get_agg_bandwidth - get the total bandwidth of an aggregator 685 * @aggregator: the aggregator we're looking at 686 * 687 */ 688 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 689 { 690 int nports = __agg_active_ports(aggregator); 691 u32 bandwidth = 0; 692 693 if (nports) { 694 switch (__get_link_speed(aggregator->lag_ports)) { 695 case AD_LINK_SPEED_1MBPS: 696 bandwidth = nports; 697 break; 698 case AD_LINK_SPEED_10MBPS: 699 bandwidth = nports * 10; 700 break; 701 case AD_LINK_SPEED_100MBPS: 702 bandwidth = nports * 100; 703 break; 704 case AD_LINK_SPEED_1000MBPS: 705 bandwidth = nports * 1000; 706 break; 707 case AD_LINK_SPEED_2500MBPS: 708 bandwidth = nports * 2500; 709 break; 710 case AD_LINK_SPEED_10000MBPS: 711 bandwidth = nports * 10000; 712 break; 713 case AD_LINK_SPEED_20000MBPS: 714 bandwidth = nports * 20000; 715 break; 716 case AD_LINK_SPEED_25000MBPS: 717 bandwidth = nports * 25000; 718 break; 719 case AD_LINK_SPEED_40000MBPS: 720 bandwidth = nports * 40000; 721 break; 722 case AD_LINK_SPEED_56000MBPS: 723 bandwidth = nports * 56000; 724 break; 725 case AD_LINK_SPEED_100000MBPS: 726 bandwidth = nports * 100000; 727 break; 728 default: 729 bandwidth = 0; /* to silence the compiler */ 730 } 731 } 732 return bandwidth; 733 } 734 735 /** 736 * __get_active_agg - get the current active aggregator 737 * @aggregator: the aggregator we're looking at 738 * 739 * Caller must hold RCU lock. 740 */ 741 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 742 { 743 struct bonding *bond = aggregator->slave->bond; 744 struct list_head *iter; 745 struct slave *slave; 746 747 bond_for_each_slave_rcu(bond, slave, iter) 748 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 749 return &(SLAVE_AD_INFO(slave)->aggregator); 750 751 return NULL; 752 } 753 754 /** 755 * __update_lacpdu_from_port - update a port's lacpdu fields 756 * @port: the port we're looking at 757 */ 758 static inline void __update_lacpdu_from_port(struct port *port) 759 { 760 struct lacpdu *lacpdu = &port->lacpdu; 761 const struct port_params *partner = &port->partner_oper; 762 763 /* update current actual Actor parameters 764 * lacpdu->subtype initialized 765 * lacpdu->version_number initialized 766 * lacpdu->tlv_type_actor_info initialized 767 * lacpdu->actor_information_length initialized 768 */ 769 770 lacpdu->actor_system_priority = htons(port->actor_system_priority); 771 lacpdu->actor_system = port->actor_system; 772 lacpdu->actor_key = htons(port->actor_oper_port_key); 773 lacpdu->actor_port_priority = htons(port->actor_port_priority); 774 lacpdu->actor_port = htons(port->actor_port_number); 775 lacpdu->actor_state = port->actor_oper_port_state; 776 pr_debug("update lacpdu: %s, actor port state %x\n", 777 port->slave->dev->name, port->actor_oper_port_state); 778 779 /* lacpdu->reserved_3_1 initialized 780 * lacpdu->tlv_type_partner_info initialized 781 * lacpdu->partner_information_length initialized 782 */ 783 784 lacpdu->partner_system_priority = htons(partner->system_priority); 785 lacpdu->partner_system = partner->system; 786 lacpdu->partner_key = htons(partner->key); 787 lacpdu->partner_port_priority = htons(partner->port_priority); 788 lacpdu->partner_port = htons(partner->port_number); 789 lacpdu->partner_state = partner->port_state; 790 791 /* lacpdu->reserved_3_2 initialized 792 * lacpdu->tlv_type_collector_info initialized 793 * lacpdu->collector_information_length initialized 794 * collector_max_delay initialized 795 * reserved_12[12] initialized 796 * tlv_type_terminator initialized 797 * terminator_length initialized 798 * reserved_50[50] initialized 799 */ 800 } 801 802 /* ================= main 802.3ad protocol code ========================= */ 803 804 /** 805 * ad_lacpdu_send - send out a lacpdu packet on a given port 806 * @port: the port we're looking at 807 * 808 * Returns: 0 on success 809 * < 0 on error 810 */ 811 static int ad_lacpdu_send(struct port *port) 812 { 813 struct slave *slave = port->slave; 814 struct sk_buff *skb; 815 struct lacpdu_header *lacpdu_header; 816 int length = sizeof(struct lacpdu_header); 817 818 skb = dev_alloc_skb(length); 819 if (!skb) 820 return -ENOMEM; 821 822 skb->dev = slave->dev; 823 skb_reset_mac_header(skb); 824 skb->network_header = skb->mac_header + ETH_HLEN; 825 skb->protocol = PKT_TYPE_LACPDU; 826 skb->priority = TC_PRIO_CONTROL; 827 828 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 829 830 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 831 /* Note: source address is set to be the member's PERMANENT address, 832 * because we use it to identify loopback lacpdus in receive. 833 */ 834 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 835 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 836 837 lacpdu_header->lacpdu = port->lacpdu; 838 839 dev_queue_xmit(skb); 840 841 return 0; 842 } 843 844 /** 845 * ad_marker_send - send marker information/response on a given port 846 * @port: the port we're looking at 847 * @marker: marker data to send 848 * 849 * Returns: 0 on success 850 * < 0 on error 851 */ 852 static int ad_marker_send(struct port *port, struct bond_marker *marker) 853 { 854 struct slave *slave = port->slave; 855 struct sk_buff *skb; 856 struct bond_marker_header *marker_header; 857 int length = sizeof(struct bond_marker_header); 858 859 skb = dev_alloc_skb(length + 16); 860 if (!skb) 861 return -ENOMEM; 862 863 skb_reserve(skb, 16); 864 865 skb->dev = slave->dev; 866 skb_reset_mac_header(skb); 867 skb->network_header = skb->mac_header + ETH_HLEN; 868 skb->protocol = PKT_TYPE_LACPDU; 869 870 marker_header = (struct bond_marker_header *)skb_put(skb, length); 871 872 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 873 /* Note: source address is set to be the member's PERMANENT address, 874 * because we use it to identify loopback MARKERs in receive. 875 */ 876 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 877 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 878 879 marker_header->marker = *marker; 880 881 dev_queue_xmit(skb); 882 883 return 0; 884 } 885 886 /** 887 * ad_mux_machine - handle a port's mux state machine 888 * @port: the port we're looking at 889 * @update_slave_arr: Does slave array need update? 890 */ 891 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 892 { 893 mux_states_t last_state; 894 895 /* keep current State Machine state to compare later if it was 896 * changed 897 */ 898 last_state = port->sm_mux_state; 899 900 if (port->sm_vars & AD_PORT_BEGIN) { 901 port->sm_mux_state = AD_MUX_DETACHED; 902 } else { 903 switch (port->sm_mux_state) { 904 case AD_MUX_DETACHED: 905 if ((port->sm_vars & AD_PORT_SELECTED) 906 || (port->sm_vars & AD_PORT_STANDBY)) 907 /* if SELECTED or STANDBY */ 908 port->sm_mux_state = AD_MUX_WAITING; 909 break; 910 case AD_MUX_WAITING: 911 /* if SELECTED == FALSE return to DETACH state */ 912 if (!(port->sm_vars & AD_PORT_SELECTED)) { 913 port->sm_vars &= ~AD_PORT_READY_N; 914 /* in order to withhold the Selection Logic to 915 * check all ports READY_N value every callback 916 * cycle to update ready variable, we check 917 * READY_N and update READY here 918 */ 919 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 920 port->sm_mux_state = AD_MUX_DETACHED; 921 break; 922 } 923 924 /* check if the wait_while_timer expired */ 925 if (port->sm_mux_timer_counter 926 && !(--port->sm_mux_timer_counter)) 927 port->sm_vars |= AD_PORT_READY_N; 928 929 /* in order to withhold the selection logic to check 930 * all ports READY_N value every callback cycle to 931 * update ready variable, we check READY_N and update 932 * READY here 933 */ 934 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 935 936 /* if the wait_while_timer expired, and the port is 937 * in READY state, move to ATTACHED state 938 */ 939 if ((port->sm_vars & AD_PORT_READY) 940 && !port->sm_mux_timer_counter) 941 port->sm_mux_state = AD_MUX_ATTACHED; 942 break; 943 case AD_MUX_ATTACHED: 944 /* check also if agg_select_timer expired (so the 945 * edable port will take place only after this timer) 946 */ 947 if ((port->sm_vars & AD_PORT_SELECTED) && 948 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 949 !__check_agg_selection_timer(port)) { 950 if (port->aggregator->is_active) 951 port->sm_mux_state = 952 AD_MUX_COLLECTING_DISTRIBUTING; 953 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 954 (port->sm_vars & AD_PORT_STANDBY)) { 955 /* if UNSELECTED or STANDBY */ 956 port->sm_vars &= ~AD_PORT_READY_N; 957 /* in order to withhold the selection logic to 958 * check all ports READY_N value every callback 959 * cycle to update ready variable, we check 960 * READY_N and update READY here 961 */ 962 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 963 port->sm_mux_state = AD_MUX_DETACHED; 964 } else if (port->aggregator->is_active) { 965 port->actor_oper_port_state |= 966 AD_STATE_SYNCHRONIZATION; 967 } 968 break; 969 case AD_MUX_COLLECTING_DISTRIBUTING: 970 if (!(port->sm_vars & AD_PORT_SELECTED) || 971 (port->sm_vars & AD_PORT_STANDBY) || 972 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 973 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 974 port->sm_mux_state = AD_MUX_ATTACHED; 975 } else { 976 /* if port state hasn't changed make 977 * sure that a collecting distributing 978 * port in an active aggregator is enabled 979 */ 980 if (port->aggregator && 981 port->aggregator->is_active && 982 !__port_is_enabled(port)) { 983 984 __enable_port(port); 985 } 986 } 987 break; 988 default: 989 break; 990 } 991 } 992 993 /* check if the state machine was changed */ 994 if (port->sm_mux_state != last_state) { 995 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 996 port->actor_port_number, 997 port->slave->dev->name, 998 last_state, 999 port->sm_mux_state); 1000 switch (port->sm_mux_state) { 1001 case AD_MUX_DETACHED: 1002 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1003 ad_disable_collecting_distributing(port, 1004 update_slave_arr); 1005 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1006 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1007 port->ntt = true; 1008 break; 1009 case AD_MUX_WAITING: 1010 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1011 break; 1012 case AD_MUX_ATTACHED: 1013 if (port->aggregator->is_active) 1014 port->actor_oper_port_state |= 1015 AD_STATE_SYNCHRONIZATION; 1016 else 1017 port->actor_oper_port_state &= 1018 ~AD_STATE_SYNCHRONIZATION; 1019 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1020 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1021 ad_disable_collecting_distributing(port, 1022 update_slave_arr); 1023 port->ntt = true; 1024 break; 1025 case AD_MUX_COLLECTING_DISTRIBUTING: 1026 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1027 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1028 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1029 ad_enable_collecting_distributing(port, 1030 update_slave_arr); 1031 port->ntt = true; 1032 break; 1033 default: 1034 break; 1035 } 1036 } 1037 } 1038 1039 /** 1040 * ad_rx_machine - handle a port's rx State Machine 1041 * @lacpdu: the lacpdu we've received 1042 * @port: the port we're looking at 1043 * 1044 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1045 * CURRENT. If timer expired set the state machine in the proper state. 1046 * In other cases, this function checks if we need to switch to other state. 1047 */ 1048 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1049 { 1050 rx_states_t last_state; 1051 1052 /* keep current State Machine state to compare later if it was 1053 * changed 1054 */ 1055 last_state = port->sm_rx_state; 1056 1057 /* check if state machine should change state */ 1058 1059 /* first, check if port was reinitialized */ 1060 if (port->sm_vars & AD_PORT_BEGIN) { 1061 port->sm_rx_state = AD_RX_INITIALIZE; 1062 port->sm_vars |= AD_PORT_CHURNED; 1063 /* check if port is not enabled */ 1064 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1065 port->sm_rx_state = AD_RX_PORT_DISABLED; 1066 /* check if new lacpdu arrived */ 1067 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1068 (port->sm_rx_state == AD_RX_DEFAULTED) || 1069 (port->sm_rx_state == AD_RX_CURRENT))) { 1070 if (port->sm_rx_state != AD_RX_CURRENT) 1071 port->sm_vars |= AD_PORT_CHURNED; 1072 port->sm_rx_timer_counter = 0; 1073 port->sm_rx_state = AD_RX_CURRENT; 1074 } else { 1075 /* if timer is on, and if it is expired */ 1076 if (port->sm_rx_timer_counter && 1077 !(--port->sm_rx_timer_counter)) { 1078 switch (port->sm_rx_state) { 1079 case AD_RX_EXPIRED: 1080 port->sm_rx_state = AD_RX_DEFAULTED; 1081 break; 1082 case AD_RX_CURRENT: 1083 port->sm_rx_state = AD_RX_EXPIRED; 1084 break; 1085 default: 1086 break; 1087 } 1088 } else { 1089 /* if no lacpdu arrived and no timer is on */ 1090 switch (port->sm_rx_state) { 1091 case AD_RX_PORT_DISABLED: 1092 if (port->is_enabled && 1093 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1094 port->sm_rx_state = AD_RX_EXPIRED; 1095 else if (port->is_enabled 1096 && ((port->sm_vars 1097 & AD_PORT_LACP_ENABLED) == 0)) 1098 port->sm_rx_state = AD_RX_LACP_DISABLED; 1099 break; 1100 default: 1101 break; 1102 1103 } 1104 } 1105 } 1106 1107 /* check if the State machine was changed or new lacpdu arrived */ 1108 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1109 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1110 port->actor_port_number, 1111 port->slave->dev->name, 1112 last_state, 1113 port->sm_rx_state); 1114 switch (port->sm_rx_state) { 1115 case AD_RX_INITIALIZE: 1116 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1117 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1118 else 1119 port->sm_vars |= AD_PORT_LACP_ENABLED; 1120 port->sm_vars &= ~AD_PORT_SELECTED; 1121 __record_default(port); 1122 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1123 port->sm_rx_state = AD_RX_PORT_DISABLED; 1124 1125 /* Fall Through */ 1126 case AD_RX_PORT_DISABLED: 1127 port->sm_vars &= ~AD_PORT_MATCHED; 1128 break; 1129 case AD_RX_LACP_DISABLED: 1130 port->sm_vars &= ~AD_PORT_SELECTED; 1131 __record_default(port); 1132 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1133 port->sm_vars |= AD_PORT_MATCHED; 1134 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1135 break; 1136 case AD_RX_EXPIRED: 1137 /* Reset of the Synchronization flag (Standard 43.4.12) 1138 * This reset cause to disable this port in the 1139 * COLLECTING_DISTRIBUTING state of the mux machine in 1140 * case of EXPIRED even if LINK_DOWN didn't arrive for 1141 * the port. 1142 */ 1143 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1144 port->sm_vars &= ~AD_PORT_MATCHED; 1145 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1146 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1147 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1148 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1149 port->sm_vars |= AD_PORT_CHURNED; 1150 break; 1151 case AD_RX_DEFAULTED: 1152 __update_default_selected(port); 1153 __record_default(port); 1154 port->sm_vars |= AD_PORT_MATCHED; 1155 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1156 break; 1157 case AD_RX_CURRENT: 1158 /* detect loopback situation */ 1159 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1160 &(port->actor_system))) { 1161 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1162 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1163 port->slave->dev->name); 1164 return; 1165 } 1166 __update_selected(lacpdu, port); 1167 __update_ntt(lacpdu, port); 1168 __record_pdu(lacpdu, port); 1169 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1170 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1171 break; 1172 default: 1173 break; 1174 } 1175 } 1176 } 1177 1178 /** 1179 * ad_churn_machine - handle port churn's state machine 1180 * @port: the port we're looking at 1181 * 1182 */ 1183 static void ad_churn_machine(struct port *port) 1184 { 1185 if (port->sm_vars & AD_PORT_CHURNED) { 1186 port->sm_vars &= ~AD_PORT_CHURNED; 1187 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1188 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1189 port->sm_churn_actor_timer_counter = 1190 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1191 port->sm_churn_partner_timer_counter = 1192 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1193 return; 1194 } 1195 if (port->sm_churn_actor_timer_counter && 1196 !(--port->sm_churn_actor_timer_counter) && 1197 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1198 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1199 port->sm_churn_actor_state = AD_NO_CHURN; 1200 } else { 1201 port->churn_actor_count++; 1202 port->sm_churn_actor_state = AD_CHURN; 1203 } 1204 } 1205 if (port->sm_churn_partner_timer_counter && 1206 !(--port->sm_churn_partner_timer_counter) && 1207 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1208 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1209 port->sm_churn_partner_state = AD_NO_CHURN; 1210 } else { 1211 port->churn_partner_count++; 1212 port->sm_churn_partner_state = AD_CHURN; 1213 } 1214 } 1215 } 1216 1217 /** 1218 * ad_tx_machine - handle a port's tx state machine 1219 * @port: the port we're looking at 1220 */ 1221 static void ad_tx_machine(struct port *port) 1222 { 1223 /* check if tx timer expired, to verify that we do not send more than 1224 * 3 packets per second 1225 */ 1226 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1227 /* check if there is something to send */ 1228 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1229 __update_lacpdu_from_port(port); 1230 1231 if (ad_lacpdu_send(port) >= 0) { 1232 pr_debug("Sent LACPDU on port %d\n", 1233 port->actor_port_number); 1234 1235 /* mark ntt as false, so it will not be sent 1236 * again until demanded 1237 */ 1238 port->ntt = false; 1239 } 1240 } 1241 /* restart tx timer(to verify that we will not exceed 1242 * AD_MAX_TX_IN_SECOND 1243 */ 1244 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1245 } 1246 } 1247 1248 /** 1249 * ad_periodic_machine - handle a port's periodic state machine 1250 * @port: the port we're looking at 1251 * 1252 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1253 */ 1254 static void ad_periodic_machine(struct port *port) 1255 { 1256 periodic_states_t last_state; 1257 1258 /* keep current state machine state to compare later if it was changed */ 1259 last_state = port->sm_periodic_state; 1260 1261 /* check if port was reinitialized */ 1262 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1263 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1264 ) { 1265 port->sm_periodic_state = AD_NO_PERIODIC; 1266 } 1267 /* check if state machine should change state */ 1268 else if (port->sm_periodic_timer_counter) { 1269 /* check if periodic state machine expired */ 1270 if (!(--port->sm_periodic_timer_counter)) { 1271 /* if expired then do tx */ 1272 port->sm_periodic_state = AD_PERIODIC_TX; 1273 } else { 1274 /* If not expired, check if there is some new timeout 1275 * parameter from the partner state 1276 */ 1277 switch (port->sm_periodic_state) { 1278 case AD_FAST_PERIODIC: 1279 if (!(port->partner_oper.port_state 1280 & AD_STATE_LACP_TIMEOUT)) 1281 port->sm_periodic_state = AD_SLOW_PERIODIC; 1282 break; 1283 case AD_SLOW_PERIODIC: 1284 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1285 port->sm_periodic_timer_counter = 0; 1286 port->sm_periodic_state = AD_PERIODIC_TX; 1287 } 1288 break; 1289 default: 1290 break; 1291 } 1292 } 1293 } else { 1294 switch (port->sm_periodic_state) { 1295 case AD_NO_PERIODIC: 1296 port->sm_periodic_state = AD_FAST_PERIODIC; 1297 break; 1298 case AD_PERIODIC_TX: 1299 if (!(port->partner_oper.port_state & 1300 AD_STATE_LACP_TIMEOUT)) 1301 port->sm_periodic_state = AD_SLOW_PERIODIC; 1302 else 1303 port->sm_periodic_state = AD_FAST_PERIODIC; 1304 break; 1305 default: 1306 break; 1307 } 1308 } 1309 1310 /* check if the state machine was changed */ 1311 if (port->sm_periodic_state != last_state) { 1312 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1313 port->actor_port_number, last_state, 1314 port->sm_periodic_state); 1315 switch (port->sm_periodic_state) { 1316 case AD_NO_PERIODIC: 1317 port->sm_periodic_timer_counter = 0; 1318 break; 1319 case AD_FAST_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_FAST_PERIODIC_TIME))-1; 1322 break; 1323 case AD_SLOW_PERIODIC: 1324 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1325 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1326 break; 1327 case AD_PERIODIC_TX: 1328 port->ntt = true; 1329 break; 1330 default: 1331 break; 1332 } 1333 } 1334 } 1335 1336 /** 1337 * ad_port_selection_logic - select aggregation groups 1338 * @port: the port we're looking at 1339 * @update_slave_arr: Does slave array need update? 1340 * 1341 * Select aggregation groups, and assign each port for it's aggregetor. The 1342 * selection logic is called in the inititalization (after all the handshkes), 1343 * and after every lacpdu receive (if selected is off). 1344 */ 1345 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1346 { 1347 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1348 struct port *last_port = NULL, *curr_port; 1349 struct list_head *iter; 1350 struct bonding *bond; 1351 struct slave *slave; 1352 int found = 0; 1353 1354 /* if the port is already Selected, do nothing */ 1355 if (port->sm_vars & AD_PORT_SELECTED) 1356 return; 1357 1358 bond = __get_bond_by_port(port); 1359 1360 /* if the port is connected to other aggregator, detach it */ 1361 if (port->aggregator) { 1362 /* detach the port from its former aggregator */ 1363 temp_aggregator = port->aggregator; 1364 for (curr_port = temp_aggregator->lag_ports; curr_port; 1365 last_port = curr_port, 1366 curr_port = curr_port->next_port_in_aggregator) { 1367 if (curr_port == port) { 1368 temp_aggregator->num_of_ports--; 1369 /* if it is the first port attached to the 1370 * aggregator 1371 */ 1372 if (!last_port) { 1373 temp_aggregator->lag_ports = 1374 port->next_port_in_aggregator; 1375 } else { 1376 /* not the first port attached to the 1377 * aggregator 1378 */ 1379 last_port->next_port_in_aggregator = 1380 port->next_port_in_aggregator; 1381 } 1382 1383 /* clear the port's relations to this 1384 * aggregator 1385 */ 1386 port->aggregator = NULL; 1387 port->next_port_in_aggregator = NULL; 1388 port->actor_port_aggregator_identifier = 0; 1389 1390 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1391 port->actor_port_number, 1392 temp_aggregator->aggregator_identifier); 1393 /* if the aggregator is empty, clear its 1394 * parameters, and set it ready to be attached 1395 */ 1396 if (!temp_aggregator->lag_ports) 1397 ad_clear_agg(temp_aggregator); 1398 break; 1399 } 1400 } 1401 if (!curr_port) { 1402 /* meaning: the port was related to an aggregator 1403 * but was not on the aggregator port list 1404 */ 1405 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1406 port->slave->bond->dev->name, 1407 port->actor_port_number, 1408 port->slave->dev->name, 1409 port->aggregator->aggregator_identifier); 1410 } 1411 } 1412 /* search on all aggregators for a suitable aggregator for this port */ 1413 bond_for_each_slave(bond, slave, iter) { 1414 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1415 1416 /* keep a free aggregator for later use(if needed) */ 1417 if (!aggregator->lag_ports) { 1418 if (!free_aggregator) 1419 free_aggregator = aggregator; 1420 continue; 1421 } 1422 /* check if current aggregator suits us */ 1423 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1424 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1425 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1426 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1427 ) && 1428 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1429 !aggregator->is_individual) /* but is not individual OR */ 1430 ) 1431 ) { 1432 /* attach to the founded aggregator */ 1433 port->aggregator = aggregator; 1434 port->actor_port_aggregator_identifier = 1435 port->aggregator->aggregator_identifier; 1436 port->next_port_in_aggregator = aggregator->lag_ports; 1437 port->aggregator->num_of_ports++; 1438 aggregator->lag_ports = port; 1439 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1440 port->actor_port_number, 1441 port->aggregator->aggregator_identifier); 1442 1443 /* mark this port as selected */ 1444 port->sm_vars |= AD_PORT_SELECTED; 1445 found = 1; 1446 break; 1447 } 1448 } 1449 1450 /* the port couldn't find an aggregator - attach it to a new 1451 * aggregator 1452 */ 1453 if (!found) { 1454 if (free_aggregator) { 1455 /* assign port a new aggregator */ 1456 port->aggregator = free_aggregator; 1457 port->actor_port_aggregator_identifier = 1458 port->aggregator->aggregator_identifier; 1459 1460 /* update the new aggregator's parameters 1461 * if port was responsed from the end-user 1462 */ 1463 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1464 /* if port is full duplex */ 1465 port->aggregator->is_individual = false; 1466 else 1467 port->aggregator->is_individual = true; 1468 1469 port->aggregator->actor_admin_aggregator_key = 1470 port->actor_admin_port_key; 1471 port->aggregator->actor_oper_aggregator_key = 1472 port->actor_oper_port_key; 1473 port->aggregator->partner_system = 1474 port->partner_oper.system; 1475 port->aggregator->partner_system_priority = 1476 port->partner_oper.system_priority; 1477 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1478 port->aggregator->receive_state = 1; 1479 port->aggregator->transmit_state = 1; 1480 port->aggregator->lag_ports = port; 1481 port->aggregator->num_of_ports++; 1482 1483 /* mark this port as selected */ 1484 port->sm_vars |= AD_PORT_SELECTED; 1485 1486 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1487 port->actor_port_number, 1488 port->aggregator->aggregator_identifier); 1489 } else { 1490 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1491 port->actor_port_number, port->slave->dev->name); 1492 } 1493 } 1494 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1495 * in all aggregator's ports, else set ready=FALSE in all 1496 * aggregator's ports 1497 */ 1498 __set_agg_ports_ready(port->aggregator, 1499 __agg_ports_are_ready(port->aggregator)); 1500 1501 aggregator = __get_first_agg(port); 1502 ad_agg_selection_logic(aggregator, update_slave_arr); 1503 1504 if (!port->aggregator->is_active) 1505 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1506 } 1507 1508 /* Decide if "agg" is a better choice for the new active aggregator that 1509 * the current best, according to the ad_select policy. 1510 */ 1511 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1512 struct aggregator *curr) 1513 { 1514 /* 0. If no best, select current. 1515 * 1516 * 1. If the current agg is not individual, and the best is 1517 * individual, select current. 1518 * 1519 * 2. If current agg is individual and the best is not, keep best. 1520 * 1521 * 3. Therefore, current and best are both individual or both not 1522 * individual, so: 1523 * 1524 * 3a. If current agg partner replied, and best agg partner did not, 1525 * select current. 1526 * 1527 * 3b. If current agg partner did not reply and best agg partner 1528 * did reply, keep best. 1529 * 1530 * 4. Therefore, current and best both have partner replies or 1531 * both do not, so perform selection policy: 1532 * 1533 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1534 * select by bandwidth. 1535 * 1536 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1537 */ 1538 if (!best) 1539 return curr; 1540 1541 if (!curr->is_individual && best->is_individual) 1542 return curr; 1543 1544 if (curr->is_individual && !best->is_individual) 1545 return best; 1546 1547 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1548 return curr; 1549 1550 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1551 return best; 1552 1553 switch (__get_agg_selection_mode(curr->lag_ports)) { 1554 case BOND_AD_COUNT: 1555 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1556 return curr; 1557 1558 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1559 return best; 1560 1561 /*FALLTHROUGH*/ 1562 case BOND_AD_STABLE: 1563 case BOND_AD_BANDWIDTH: 1564 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1565 return curr; 1566 1567 break; 1568 1569 default: 1570 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1571 curr->slave->bond->dev->name, 1572 __get_agg_selection_mode(curr->lag_ports)); 1573 break; 1574 } 1575 1576 return best; 1577 } 1578 1579 static int agg_device_up(const struct aggregator *agg) 1580 { 1581 struct port *port = agg->lag_ports; 1582 1583 if (!port) 1584 return 0; 1585 1586 for (port = agg->lag_ports; port; 1587 port = port->next_port_in_aggregator) { 1588 if (netif_running(port->slave->dev) && 1589 netif_carrier_ok(port->slave->dev)) 1590 return 1; 1591 } 1592 1593 return 0; 1594 } 1595 1596 /** 1597 * ad_agg_selection_logic - select an aggregation group for a team 1598 * @aggregator: the aggregator we're looking at 1599 * @update_slave_arr: Does slave array need update? 1600 * 1601 * It is assumed that only one aggregator may be selected for a team. 1602 * 1603 * The logic of this function is to select the aggregator according to 1604 * the ad_select policy: 1605 * 1606 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1607 * it, and to reselect the active aggregator only if the previous 1608 * aggregator has no more ports related to it. 1609 * 1610 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1611 * bandwidth, and reselect whenever a link state change takes place or the 1612 * set of slaves in the bond changes. 1613 * 1614 * BOND_AD_COUNT: select the aggregator with largest number of ports 1615 * (slaves), and reselect whenever a link state change takes place or the 1616 * set of slaves in the bond changes. 1617 * 1618 * FIXME: this function MUST be called with the first agg in the bond, or 1619 * __get_active_agg() won't work correctly. This function should be better 1620 * called with the bond itself, and retrieve the first agg from it. 1621 */ 1622 static void ad_agg_selection_logic(struct aggregator *agg, 1623 bool *update_slave_arr) 1624 { 1625 struct aggregator *best, *active, *origin; 1626 struct bonding *bond = agg->slave->bond; 1627 struct list_head *iter; 1628 struct slave *slave; 1629 struct port *port; 1630 1631 rcu_read_lock(); 1632 origin = agg; 1633 active = __get_active_agg(agg); 1634 best = (active && agg_device_up(active)) ? active : NULL; 1635 1636 bond_for_each_slave_rcu(bond, slave, iter) { 1637 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1638 1639 agg->is_active = 0; 1640 1641 if (__agg_active_ports(agg) && agg_device_up(agg)) 1642 best = ad_agg_selection_test(best, agg); 1643 } 1644 1645 if (best && 1646 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1647 /* For the STABLE policy, don't replace the old active 1648 * aggregator if it's still active (it has an answering 1649 * partner) or if both the best and active don't have an 1650 * answering partner. 1651 */ 1652 if (active && active->lag_ports && 1653 __agg_active_ports(active) && 1654 (__agg_has_partner(active) || 1655 (!__agg_has_partner(active) && 1656 !__agg_has_partner(best)))) { 1657 if (!(!active->actor_oper_aggregator_key && 1658 best->actor_oper_aggregator_key)) { 1659 best = NULL; 1660 active->is_active = 1; 1661 } 1662 } 1663 } 1664 1665 if (best && (best == active)) { 1666 best = NULL; 1667 active->is_active = 1; 1668 } 1669 1670 /* if there is new best aggregator, activate it */ 1671 if (best) { 1672 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1673 best->aggregator_identifier, best->num_of_ports, 1674 best->actor_oper_aggregator_key, 1675 best->partner_oper_aggregator_key, 1676 best->is_individual, best->is_active); 1677 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1678 best->lag_ports, best->slave, 1679 best->slave ? best->slave->dev->name : "NULL"); 1680 1681 bond_for_each_slave_rcu(bond, slave, iter) { 1682 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1683 1684 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1685 agg->aggregator_identifier, agg->num_of_ports, 1686 agg->actor_oper_aggregator_key, 1687 agg->partner_oper_aggregator_key, 1688 agg->is_individual, agg->is_active); 1689 } 1690 1691 /* check if any partner replys */ 1692 if (best->is_individual) { 1693 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1694 best->slave ? 1695 best->slave->bond->dev->name : "NULL"); 1696 } 1697 1698 best->is_active = 1; 1699 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1700 best->aggregator_identifier); 1701 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1702 best->aggregator_identifier, best->num_of_ports, 1703 best->actor_oper_aggregator_key, 1704 best->partner_oper_aggregator_key, 1705 best->is_individual, best->is_active); 1706 1707 /* disable the ports that were related to the former 1708 * active_aggregator 1709 */ 1710 if (active) { 1711 for (port = active->lag_ports; port; 1712 port = port->next_port_in_aggregator) { 1713 __disable_port(port); 1714 } 1715 } 1716 /* Slave array needs update. */ 1717 *update_slave_arr = true; 1718 } 1719 1720 /* if the selected aggregator is of join individuals 1721 * (partner_system is NULL), enable their ports 1722 */ 1723 active = __get_active_agg(origin); 1724 1725 if (active) { 1726 if (!__agg_has_partner(active)) { 1727 for (port = active->lag_ports; port; 1728 port = port->next_port_in_aggregator) { 1729 __enable_port(port); 1730 } 1731 } 1732 } 1733 1734 rcu_read_unlock(); 1735 1736 bond_3ad_set_carrier(bond); 1737 } 1738 1739 /** 1740 * ad_clear_agg - clear a given aggregator's parameters 1741 * @aggregator: the aggregator we're looking at 1742 */ 1743 static void ad_clear_agg(struct aggregator *aggregator) 1744 { 1745 if (aggregator) { 1746 aggregator->is_individual = false; 1747 aggregator->actor_admin_aggregator_key = 0; 1748 aggregator->actor_oper_aggregator_key = 0; 1749 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1750 aggregator->partner_system_priority = 0; 1751 aggregator->partner_oper_aggregator_key = 0; 1752 aggregator->receive_state = 0; 1753 aggregator->transmit_state = 0; 1754 aggregator->lag_ports = NULL; 1755 aggregator->is_active = 0; 1756 aggregator->num_of_ports = 0; 1757 pr_debug("LAG %d was cleared\n", 1758 aggregator->aggregator_identifier); 1759 } 1760 } 1761 1762 /** 1763 * ad_initialize_agg - initialize a given aggregator's parameters 1764 * @aggregator: the aggregator we're looking at 1765 */ 1766 static void ad_initialize_agg(struct aggregator *aggregator) 1767 { 1768 if (aggregator) { 1769 ad_clear_agg(aggregator); 1770 1771 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1772 aggregator->aggregator_identifier = 0; 1773 aggregator->slave = NULL; 1774 } 1775 } 1776 1777 /** 1778 * ad_initialize_port - initialize a given port's parameters 1779 * @aggregator: the aggregator we're looking at 1780 * @lacp_fast: boolean. whether fast periodic should be used 1781 */ 1782 static void ad_initialize_port(struct port *port, int lacp_fast) 1783 { 1784 static const struct port_params tmpl = { 1785 .system_priority = 0xffff, 1786 .key = 1, 1787 .port_number = 1, 1788 .port_priority = 0xff, 1789 .port_state = 1, 1790 }; 1791 static const struct lacpdu lacpdu = { 1792 .subtype = 0x01, 1793 .version_number = 0x01, 1794 .tlv_type_actor_info = 0x01, 1795 .actor_information_length = 0x14, 1796 .tlv_type_partner_info = 0x02, 1797 .partner_information_length = 0x14, 1798 .tlv_type_collector_info = 0x03, 1799 .collector_information_length = 0x10, 1800 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1801 }; 1802 1803 if (port) { 1804 port->actor_port_priority = 0xff; 1805 port->actor_port_aggregator_identifier = 0; 1806 port->ntt = false; 1807 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1808 AD_STATE_LACP_ACTIVITY; 1809 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1810 AD_STATE_LACP_ACTIVITY; 1811 1812 if (lacp_fast) 1813 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1814 1815 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1816 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1817 1818 port->is_enabled = true; 1819 /* private parameters */ 1820 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1821 port->sm_rx_state = 0; 1822 port->sm_rx_timer_counter = 0; 1823 port->sm_periodic_state = 0; 1824 port->sm_periodic_timer_counter = 0; 1825 port->sm_mux_state = 0; 1826 port->sm_mux_timer_counter = 0; 1827 port->sm_tx_state = 0; 1828 port->aggregator = NULL; 1829 port->next_port_in_aggregator = NULL; 1830 port->transaction_id = 0; 1831 1832 port->sm_churn_actor_timer_counter = 0; 1833 port->sm_churn_actor_state = 0; 1834 port->churn_actor_count = 0; 1835 port->sm_churn_partner_timer_counter = 0; 1836 port->sm_churn_partner_state = 0; 1837 port->churn_partner_count = 0; 1838 1839 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1840 } 1841 } 1842 1843 /** 1844 * ad_enable_collecting_distributing - enable a port's transmit/receive 1845 * @port: the port we're looking at 1846 * @update_slave_arr: Does slave array need update? 1847 * 1848 * Enable @port if it's in an active aggregator 1849 */ 1850 static void ad_enable_collecting_distributing(struct port *port, 1851 bool *update_slave_arr) 1852 { 1853 if (port->aggregator->is_active) { 1854 pr_debug("Enabling port %d(LAG %d)\n", 1855 port->actor_port_number, 1856 port->aggregator->aggregator_identifier); 1857 __enable_port(port); 1858 /* Slave array needs update */ 1859 *update_slave_arr = true; 1860 } 1861 } 1862 1863 /** 1864 * ad_disable_collecting_distributing - disable a port's transmit/receive 1865 * @port: the port we're looking at 1866 * @update_slave_arr: Does slave array need update? 1867 */ 1868 static void ad_disable_collecting_distributing(struct port *port, 1869 bool *update_slave_arr) 1870 { 1871 if (port->aggregator && 1872 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1873 &(null_mac_addr))) { 1874 pr_debug("Disabling port %d(LAG %d)\n", 1875 port->actor_port_number, 1876 port->aggregator->aggregator_identifier); 1877 __disable_port(port); 1878 /* Slave array needs an update */ 1879 *update_slave_arr = true; 1880 } 1881 } 1882 1883 /** 1884 * ad_marker_info_received - handle receive of a Marker information frame 1885 * @marker_info: Marker info received 1886 * @port: the port we're looking at 1887 */ 1888 static void ad_marker_info_received(struct bond_marker *marker_info, 1889 struct port *port) 1890 { 1891 struct bond_marker marker; 1892 1893 /* copy the received marker data to the response marker */ 1894 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1895 /* change the marker subtype to marker response */ 1896 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1897 1898 /* send the marker response */ 1899 if (ad_marker_send(port, &marker) >= 0) { 1900 pr_debug("Sent Marker Response on port %d\n", 1901 port->actor_port_number); 1902 } 1903 } 1904 1905 /** 1906 * ad_marker_response_received - handle receive of a marker response frame 1907 * @marker: marker PDU received 1908 * @port: the port we're looking at 1909 * 1910 * This function does nothing since we decided not to implement send and handle 1911 * response for marker PDU's, in this stage, but only to respond to marker 1912 * information. 1913 */ 1914 static void ad_marker_response_received(struct bond_marker *marker, 1915 struct port *port) 1916 { 1917 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1918 } 1919 1920 /* ========= AD exported functions to the main bonding code ========= */ 1921 1922 /* Check aggregators status in team every T seconds */ 1923 #define AD_AGGREGATOR_SELECTION_TIMER 8 1924 1925 /** 1926 * bond_3ad_initiate_agg_selection - initate aggregator selection 1927 * @bond: bonding struct 1928 * 1929 * Set the aggregation selection timer, to initiate an agg selection in 1930 * the very near future. Called during first initialization, and during 1931 * any down to up transitions of the bond. 1932 */ 1933 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1934 { 1935 BOND_AD_INFO(bond).agg_select_timer = timeout; 1936 } 1937 1938 /** 1939 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1940 * @bond: bonding struct to work on 1941 * @tick_resolution: tick duration (millisecond resolution) 1942 * 1943 * Can be called only after the mac address of the bond is set. 1944 */ 1945 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1946 { 1947 /* check that the bond is not initialized yet */ 1948 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1949 bond->dev->dev_addr)) { 1950 1951 BOND_AD_INFO(bond).aggregator_identifier = 0; 1952 1953 BOND_AD_INFO(bond).system.sys_priority = 1954 bond->params.ad_actor_sys_prio; 1955 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1956 BOND_AD_INFO(bond).system.sys_mac_addr = 1957 *((struct mac_addr *)bond->dev->dev_addr); 1958 else 1959 BOND_AD_INFO(bond).system.sys_mac_addr = 1960 *((struct mac_addr *)bond->params.ad_actor_system); 1961 1962 /* initialize how many times this module is called in one 1963 * second (should be about every 100ms) 1964 */ 1965 ad_ticks_per_sec = tick_resolution; 1966 1967 bond_3ad_initiate_agg_selection(bond, 1968 AD_AGGREGATOR_SELECTION_TIMER * 1969 ad_ticks_per_sec); 1970 } 1971 } 1972 1973 /** 1974 * bond_3ad_bind_slave - initialize a slave's port 1975 * @slave: slave struct to work on 1976 * 1977 * Returns: 0 on success 1978 * < 0 on error 1979 */ 1980 void bond_3ad_bind_slave(struct slave *slave) 1981 { 1982 struct bonding *bond = bond_get_bond_by_slave(slave); 1983 struct port *port; 1984 struct aggregator *aggregator; 1985 1986 /* check that the slave has not been initialized yet. */ 1987 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 1988 1989 /* port initialization */ 1990 port = &(SLAVE_AD_INFO(slave)->port); 1991 1992 ad_initialize_port(port, bond->params.lacp_fast); 1993 1994 port->slave = slave; 1995 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 1996 /* key is determined according to the link speed, duplex and 1997 * user key 1998 */ 1999 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2000 ad_update_actor_keys(port, false); 2001 /* actor system is the bond's system */ 2002 __ad_actor_update_port(port); 2003 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2004 * lacpdu's are sent in one second) 2005 */ 2006 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2007 2008 __disable_port(port); 2009 2010 /* aggregator initialization */ 2011 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2012 2013 ad_initialize_agg(aggregator); 2014 2015 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2016 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2017 aggregator->slave = slave; 2018 aggregator->is_active = 0; 2019 aggregator->num_of_ports = 0; 2020 } 2021 } 2022 2023 /** 2024 * bond_3ad_unbind_slave - deinitialize a slave's port 2025 * @slave: slave struct to work on 2026 * 2027 * Search for the aggregator that is related to this port, remove the 2028 * aggregator and assign another aggregator for other port related to it 2029 * (if any), and remove the port. 2030 */ 2031 void bond_3ad_unbind_slave(struct slave *slave) 2032 { 2033 struct port *port, *prev_port, *temp_port; 2034 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2035 int select_new_active_agg = 0; 2036 struct bonding *bond = slave->bond; 2037 struct slave *slave_iter; 2038 struct list_head *iter; 2039 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2040 2041 /* Sync against bond_3ad_state_machine_handler() */ 2042 spin_lock_bh(&bond->mode_lock); 2043 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2044 port = &(SLAVE_AD_INFO(slave)->port); 2045 2046 /* if slave is null, the whole port is not initialized */ 2047 if (!port->slave) { 2048 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2049 slave->dev->name); 2050 goto out; 2051 } 2052 2053 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2054 aggregator->aggregator_identifier); 2055 2056 /* Tell the partner that this port is not suitable for aggregation */ 2057 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2058 __update_lacpdu_from_port(port); 2059 ad_lacpdu_send(port); 2060 2061 /* check if this aggregator is occupied */ 2062 if (aggregator->lag_ports) { 2063 /* check if there are other ports related to this aggregator 2064 * except the port related to this slave(thats ensure us that 2065 * there is a reason to search for new aggregator, and that we 2066 * will find one 2067 */ 2068 if ((aggregator->lag_ports != port) || 2069 (aggregator->lag_ports->next_port_in_aggregator)) { 2070 /* find new aggregator for the related port(s) */ 2071 bond_for_each_slave(bond, slave_iter, iter) { 2072 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2073 /* if the new aggregator is empty, or it is 2074 * connected to our port only 2075 */ 2076 if (!new_aggregator->lag_ports || 2077 ((new_aggregator->lag_ports == port) && 2078 !new_aggregator->lag_ports->next_port_in_aggregator)) 2079 break; 2080 } 2081 if (!slave_iter) 2082 new_aggregator = NULL; 2083 2084 /* if new aggregator found, copy the aggregator's 2085 * parameters and connect the related lag_ports to the 2086 * new aggregator 2087 */ 2088 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2089 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2090 aggregator->aggregator_identifier, 2091 new_aggregator->aggregator_identifier); 2092 2093 if ((new_aggregator->lag_ports == port) && 2094 new_aggregator->is_active) { 2095 netdev_info(bond->dev, "Removing an active aggregator\n"); 2096 select_new_active_agg = 1; 2097 } 2098 2099 new_aggregator->is_individual = aggregator->is_individual; 2100 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2101 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2102 new_aggregator->partner_system = aggregator->partner_system; 2103 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2104 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2105 new_aggregator->receive_state = aggregator->receive_state; 2106 new_aggregator->transmit_state = aggregator->transmit_state; 2107 new_aggregator->lag_ports = aggregator->lag_ports; 2108 new_aggregator->is_active = aggregator->is_active; 2109 new_aggregator->num_of_ports = aggregator->num_of_ports; 2110 2111 /* update the information that is written on 2112 * the ports about the aggregator 2113 */ 2114 for (temp_port = aggregator->lag_ports; temp_port; 2115 temp_port = temp_port->next_port_in_aggregator) { 2116 temp_port->aggregator = new_aggregator; 2117 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2118 } 2119 2120 ad_clear_agg(aggregator); 2121 2122 if (select_new_active_agg) 2123 ad_agg_selection_logic(__get_first_agg(port), 2124 &dummy_slave_update); 2125 } else { 2126 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2127 } 2128 } else { 2129 /* in case that the only port related to this 2130 * aggregator is the one we want to remove 2131 */ 2132 select_new_active_agg = aggregator->is_active; 2133 ad_clear_agg(aggregator); 2134 if (select_new_active_agg) { 2135 netdev_info(bond->dev, "Removing an active aggregator\n"); 2136 /* select new active aggregator */ 2137 temp_aggregator = __get_first_agg(port); 2138 if (temp_aggregator) 2139 ad_agg_selection_logic(temp_aggregator, 2140 &dummy_slave_update); 2141 } 2142 } 2143 } 2144 2145 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2146 2147 /* find the aggregator that this port is connected to */ 2148 bond_for_each_slave(bond, slave_iter, iter) { 2149 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2150 prev_port = NULL; 2151 /* search the port in the aggregator's related ports */ 2152 for (temp_port = temp_aggregator->lag_ports; temp_port; 2153 prev_port = temp_port, 2154 temp_port = temp_port->next_port_in_aggregator) { 2155 if (temp_port == port) { 2156 /* the aggregator found - detach the port from 2157 * this aggregator 2158 */ 2159 if (prev_port) 2160 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2161 else 2162 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2163 temp_aggregator->num_of_ports--; 2164 if (__agg_active_ports(temp_aggregator) == 0) { 2165 select_new_active_agg = temp_aggregator->is_active; 2166 ad_clear_agg(temp_aggregator); 2167 if (select_new_active_agg) { 2168 netdev_info(bond->dev, "Removing an active aggregator\n"); 2169 /* select new active aggregator */ 2170 ad_agg_selection_logic(__get_first_agg(port), 2171 &dummy_slave_update); 2172 } 2173 } 2174 break; 2175 } 2176 } 2177 } 2178 port->slave = NULL; 2179 2180 out: 2181 spin_unlock_bh(&bond->mode_lock); 2182 } 2183 2184 /** 2185 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2186 * @bond: bonding struct to work on 2187 * 2188 * If an ad_actor setting gets changed we need to update the individual port 2189 * settings so the bond device will use the new values when it gets upped. 2190 */ 2191 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2192 { 2193 struct list_head *iter; 2194 struct slave *slave; 2195 2196 ASSERT_RTNL(); 2197 2198 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2199 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2200 BOND_AD_INFO(bond).system.sys_mac_addr = 2201 *((struct mac_addr *)bond->dev->dev_addr); 2202 else 2203 BOND_AD_INFO(bond).system.sys_mac_addr = 2204 *((struct mac_addr *)bond->params.ad_actor_system); 2205 2206 spin_lock_bh(&bond->mode_lock); 2207 bond_for_each_slave(bond, slave, iter) { 2208 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2209 2210 __ad_actor_update_port(port); 2211 port->ntt = true; 2212 } 2213 spin_unlock_bh(&bond->mode_lock); 2214 } 2215 2216 /** 2217 * bond_3ad_state_machine_handler - handle state machines timeout 2218 * @bond: bonding struct to work on 2219 * 2220 * The state machine handling concept in this module is to check every tick 2221 * which state machine should operate any function. The execution order is 2222 * round robin, so when we have an interaction between state machines, the 2223 * reply of one to each other might be delayed until next tick. 2224 * 2225 * This function also complete the initialization when the agg_select_timer 2226 * times out, and it selects an aggregator for the ports that are yet not 2227 * related to any aggregator, and selects the active aggregator for a bond. 2228 */ 2229 void bond_3ad_state_machine_handler(struct work_struct *work) 2230 { 2231 struct bonding *bond = container_of(work, struct bonding, 2232 ad_work.work); 2233 struct aggregator *aggregator; 2234 struct list_head *iter; 2235 struct slave *slave; 2236 struct port *port; 2237 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2238 bool update_slave_arr = false; 2239 2240 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2241 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2242 * concurrently due to incoming LACPDU as well. 2243 */ 2244 spin_lock_bh(&bond->mode_lock); 2245 rcu_read_lock(); 2246 2247 /* check if there are any slaves */ 2248 if (!bond_has_slaves(bond)) 2249 goto re_arm; 2250 2251 /* check if agg_select_timer timer after initialize is timed out */ 2252 if (BOND_AD_INFO(bond).agg_select_timer && 2253 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2254 slave = bond_first_slave_rcu(bond); 2255 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2256 2257 /* select the active aggregator for the bond */ 2258 if (port) { 2259 if (!port->slave) { 2260 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2261 bond->dev->name); 2262 goto re_arm; 2263 } 2264 2265 aggregator = __get_first_agg(port); 2266 ad_agg_selection_logic(aggregator, &update_slave_arr); 2267 } 2268 bond_3ad_set_carrier(bond); 2269 } 2270 2271 /* for each port run the state machines */ 2272 bond_for_each_slave_rcu(bond, slave, iter) { 2273 port = &(SLAVE_AD_INFO(slave)->port); 2274 if (!port->slave) { 2275 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2276 bond->dev->name); 2277 goto re_arm; 2278 } 2279 2280 ad_rx_machine(NULL, port); 2281 ad_periodic_machine(port); 2282 ad_port_selection_logic(port, &update_slave_arr); 2283 ad_mux_machine(port, &update_slave_arr); 2284 ad_tx_machine(port); 2285 ad_churn_machine(port); 2286 2287 /* turn off the BEGIN bit, since we already handled it */ 2288 if (port->sm_vars & AD_PORT_BEGIN) 2289 port->sm_vars &= ~AD_PORT_BEGIN; 2290 } 2291 2292 re_arm: 2293 bond_for_each_slave_rcu(bond, slave, iter) { 2294 if (slave->should_notify) { 2295 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2296 break; 2297 } 2298 } 2299 rcu_read_unlock(); 2300 spin_unlock_bh(&bond->mode_lock); 2301 2302 if (update_slave_arr) 2303 bond_slave_arr_work_rearm(bond, 0); 2304 2305 if (should_notify_rtnl && rtnl_trylock()) { 2306 bond_slave_state_notify(bond); 2307 rtnl_unlock(); 2308 } 2309 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2310 } 2311 2312 /** 2313 * bond_3ad_rx_indication - handle a received frame 2314 * @lacpdu: received lacpdu 2315 * @slave: slave struct to work on 2316 * @length: length of the data received 2317 * 2318 * It is assumed that frames that were sent on this NIC don't returned as new 2319 * received frames (loopback). Since only the payload is given to this 2320 * function, it check for loopback. 2321 */ 2322 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2323 u16 length) 2324 { 2325 struct port *port; 2326 int ret = RX_HANDLER_ANOTHER; 2327 2328 if (length >= sizeof(struct lacpdu)) { 2329 2330 port = &(SLAVE_AD_INFO(slave)->port); 2331 2332 if (!port->slave) { 2333 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2334 slave->dev->name, slave->bond->dev->name); 2335 return ret; 2336 } 2337 2338 switch (lacpdu->subtype) { 2339 case AD_TYPE_LACPDU: 2340 ret = RX_HANDLER_CONSUMED; 2341 netdev_dbg(slave->bond->dev, 2342 "Received LACPDU on port %d slave %s\n", 2343 port->actor_port_number, 2344 slave->dev->name); 2345 /* Protect against concurrent state machines */ 2346 spin_lock(&slave->bond->mode_lock); 2347 ad_rx_machine(lacpdu, port); 2348 spin_unlock(&slave->bond->mode_lock); 2349 break; 2350 2351 case AD_TYPE_MARKER: 2352 ret = RX_HANDLER_CONSUMED; 2353 /* No need to convert fields to Little Endian since we 2354 * don't use the marker's fields. 2355 */ 2356 2357 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2358 case AD_MARKER_INFORMATION_SUBTYPE: 2359 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2360 port->actor_port_number); 2361 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2362 break; 2363 2364 case AD_MARKER_RESPONSE_SUBTYPE: 2365 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2366 port->actor_port_number); 2367 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2368 break; 2369 2370 default: 2371 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2372 port->actor_port_number); 2373 } 2374 } 2375 } 2376 return ret; 2377 } 2378 2379 /** 2380 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2381 * its current speed and duplex settings. 2382 * 2383 * @port: the port we'are looking at 2384 * @reset: Boolean to just reset the speed and the duplex part of the key 2385 * 2386 * The logic to change the oper / admin keys is: 2387 * (a) A full duplex port can participate in LACP with partner. 2388 * (b) When the speed is changed, LACP need to be reinitiated. 2389 */ 2390 static void ad_update_actor_keys(struct port *port, bool reset) 2391 { 2392 u8 duplex = 0; 2393 u16 ospeed = 0, speed = 0; 2394 u16 old_oper_key = port->actor_oper_port_key; 2395 2396 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2397 if (!reset) { 2398 speed = __get_link_speed(port); 2399 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2400 duplex = __get_duplex(port); 2401 port->actor_admin_port_key |= (speed << 1) | duplex; 2402 } 2403 port->actor_oper_port_key = port->actor_admin_port_key; 2404 2405 if (old_oper_key != port->actor_oper_port_key) { 2406 /* Only 'duplex' port participates in LACP */ 2407 if (duplex) 2408 port->sm_vars |= AD_PORT_LACP_ENABLED; 2409 else 2410 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2411 2412 if (!reset) { 2413 if (!speed) { 2414 netdev_err(port->slave->dev, 2415 "speed changed to 0 for port %s", 2416 port->slave->dev->name); 2417 } else if (duplex && ospeed != speed) { 2418 /* Speed change restarts LACP state-machine */ 2419 port->sm_vars |= AD_PORT_BEGIN; 2420 } 2421 } 2422 } 2423 } 2424 2425 /** 2426 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2427 * change indication 2428 * 2429 * @slave: slave struct to work on 2430 * 2431 * Handle reselection of aggregator (if needed) for this port. 2432 */ 2433 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2434 { 2435 struct port *port; 2436 2437 port = &(SLAVE_AD_INFO(slave)->port); 2438 2439 /* if slave is null, the whole port is not initialized */ 2440 if (!port->slave) { 2441 netdev_warn(slave->bond->dev, 2442 "speed/duplex changed for uninitialized port %s\n", 2443 slave->dev->name); 2444 return; 2445 } 2446 2447 spin_lock_bh(&slave->bond->mode_lock); 2448 ad_update_actor_keys(port, false); 2449 spin_unlock_bh(&slave->bond->mode_lock); 2450 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", 2451 port->actor_port_number, slave->dev->name); 2452 } 2453 2454 /** 2455 * bond_3ad_handle_link_change - handle a slave's link status change indication 2456 * @slave: slave struct to work on 2457 * @status: whether the link is now up or down 2458 * 2459 * Handle reselection of aggregator (if needed) for this port. 2460 */ 2461 void bond_3ad_handle_link_change(struct slave *slave, char link) 2462 { 2463 struct aggregator *agg; 2464 struct port *port; 2465 bool dummy; 2466 2467 port = &(SLAVE_AD_INFO(slave)->port); 2468 2469 /* if slave is null, the whole port is not initialized */ 2470 if (!port->slave) { 2471 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2472 slave->dev->name); 2473 return; 2474 } 2475 2476 spin_lock_bh(&slave->bond->mode_lock); 2477 /* on link down we are zeroing duplex and speed since 2478 * some of the adaptors(ce1000.lan) report full duplex/speed 2479 * instead of N/A(duplex) / 0(speed). 2480 * 2481 * on link up we are forcing recheck on the duplex and speed since 2482 * some of he adaptors(ce1000.lan) report. 2483 */ 2484 if (link == BOND_LINK_UP) { 2485 port->is_enabled = true; 2486 ad_update_actor_keys(port, false); 2487 } else { 2488 /* link has failed */ 2489 port->is_enabled = false; 2490 ad_update_actor_keys(port, true); 2491 } 2492 agg = __get_first_agg(port); 2493 ad_agg_selection_logic(agg, &dummy); 2494 2495 spin_unlock_bh(&slave->bond->mode_lock); 2496 2497 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2498 port->actor_port_number, 2499 link == BOND_LINK_UP ? "UP" : "DOWN"); 2500 2501 /* RTNL is held and mode_lock is released so it's safe 2502 * to update slave_array here. 2503 */ 2504 bond_update_slave_arr(slave->bond, NULL); 2505 } 2506 2507 /** 2508 * bond_3ad_set_carrier - set link state for bonding master 2509 * @bond - bonding structure 2510 * 2511 * if we have an active aggregator, we're up, if not, we're down. 2512 * Presumes that we cannot have an active aggregator if there are 2513 * no slaves with link up. 2514 * 2515 * This behavior complies with IEEE 802.3 section 43.3.9. 2516 * 2517 * Called by bond_set_carrier(). Return zero if carrier state does not 2518 * change, nonzero if it does. 2519 */ 2520 int bond_3ad_set_carrier(struct bonding *bond) 2521 { 2522 struct aggregator *active; 2523 struct slave *first_slave; 2524 int ret = 1; 2525 2526 rcu_read_lock(); 2527 first_slave = bond_first_slave_rcu(bond); 2528 if (!first_slave) { 2529 ret = 0; 2530 goto out; 2531 } 2532 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2533 if (active) { 2534 /* are enough slaves available to consider link up? */ 2535 if (__agg_active_ports(active) < bond->params.min_links) { 2536 if (netif_carrier_ok(bond->dev)) { 2537 netif_carrier_off(bond->dev); 2538 goto out; 2539 } 2540 } else if (!netif_carrier_ok(bond->dev)) { 2541 netif_carrier_on(bond->dev); 2542 goto out; 2543 } 2544 } else if (netif_carrier_ok(bond->dev)) { 2545 netif_carrier_off(bond->dev); 2546 } 2547 out: 2548 rcu_read_unlock(); 2549 return ret; 2550 } 2551 2552 /** 2553 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2554 * @bond: bonding struct to work on 2555 * @ad_info: ad_info struct to fill with the bond's info 2556 * 2557 * Returns: 0 on success 2558 * < 0 on error 2559 */ 2560 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2561 struct ad_info *ad_info) 2562 { 2563 struct aggregator *aggregator = NULL; 2564 struct list_head *iter; 2565 struct slave *slave; 2566 struct port *port; 2567 2568 bond_for_each_slave_rcu(bond, slave, iter) { 2569 port = &(SLAVE_AD_INFO(slave)->port); 2570 if (port->aggregator && port->aggregator->is_active) { 2571 aggregator = port->aggregator; 2572 break; 2573 } 2574 } 2575 2576 if (!aggregator) 2577 return -1; 2578 2579 ad_info->aggregator_id = aggregator->aggregator_identifier; 2580 ad_info->ports = aggregator->num_of_ports; 2581 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2582 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2583 ether_addr_copy(ad_info->partner_system, 2584 aggregator->partner_system.mac_addr_value); 2585 return 0; 2586 } 2587 2588 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2589 { 2590 int ret; 2591 2592 rcu_read_lock(); 2593 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2594 rcu_read_unlock(); 2595 2596 return ret; 2597 } 2598 2599 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2600 struct slave *slave) 2601 { 2602 struct lacpdu *lacpdu, _lacpdu; 2603 2604 if (skb->protocol != PKT_TYPE_LACPDU) 2605 return RX_HANDLER_ANOTHER; 2606 2607 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2608 return RX_HANDLER_ANOTHER; 2609 2610 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2611 if (!lacpdu) 2612 return RX_HANDLER_ANOTHER; 2613 2614 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2615 } 2616 2617 /** 2618 * bond_3ad_update_lacp_rate - change the lacp rate 2619 * @bond - bonding struct 2620 * 2621 * When modify lacp_rate parameter via sysfs, 2622 * update actor_oper_port_state of each port. 2623 * 2624 * Hold bond->mode_lock, 2625 * so we can modify port->actor_oper_port_state, 2626 * no matter bond is up or down. 2627 */ 2628 void bond_3ad_update_lacp_rate(struct bonding *bond) 2629 { 2630 struct port *port = NULL; 2631 struct list_head *iter; 2632 struct slave *slave; 2633 int lacp_fast; 2634 2635 lacp_fast = bond->params.lacp_fast; 2636 spin_lock_bh(&bond->mode_lock); 2637 bond_for_each_slave(bond, slave, iter) { 2638 port = &(SLAVE_AD_INFO(slave)->port); 2639 if (lacp_fast) 2640 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2641 else 2642 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2643 } 2644 spin_unlock_bh(&bond->mode_lock); 2645 } 2646