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_5000MBPS, 94 AD_LINK_SPEED_10000MBPS, 95 AD_LINK_SPEED_14000MBPS, 96 AD_LINK_SPEED_20000MBPS, 97 AD_LINK_SPEED_25000MBPS, 98 AD_LINK_SPEED_40000MBPS, 99 AD_LINK_SPEED_50000MBPS, 100 AD_LINK_SPEED_56000MBPS, 101 AD_LINK_SPEED_100000MBPS, 102 }; 103 104 /* compare MAC addresses */ 105 #define MAC_ADDRESS_EQUAL(A, B) \ 106 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 107 108 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 109 0, 0, 0, 0, 0, 0 110 }; 111 static u16 ad_ticks_per_sec; 112 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 113 114 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = 115 MULTICAST_LACPDU_ADDR; 116 117 /* ================= main 802.3ad protocol functions ================== */ 118 static int ad_lacpdu_send(struct port *port); 119 static int ad_marker_send(struct port *port, struct bond_marker *marker); 120 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 121 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 122 static void ad_tx_machine(struct port *port); 123 static void ad_periodic_machine(struct port *port); 124 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 125 static void ad_agg_selection_logic(struct aggregator *aggregator, 126 bool *update_slave_arr); 127 static void ad_clear_agg(struct aggregator *aggregator); 128 static void ad_initialize_agg(struct aggregator *aggregator); 129 static void ad_initialize_port(struct port *port, int lacp_fast); 130 static void ad_enable_collecting_distributing(struct port *port, 131 bool *update_slave_arr); 132 static void ad_disable_collecting_distributing(struct port *port, 133 bool *update_slave_arr); 134 static void ad_marker_info_received(struct bond_marker *marker_info, 135 struct port *port); 136 static void ad_marker_response_received(struct bond_marker *marker, 137 struct port *port); 138 static void ad_update_actor_keys(struct port *port, bool reset); 139 140 141 /* ================= api to bonding and kernel code ================== */ 142 143 /** 144 * __get_bond_by_port - get the port's bonding struct 145 * @port: the port we're looking at 146 * 147 * Return @port's bonding struct, or %NULL if it can't be found. 148 */ 149 static inline struct bonding *__get_bond_by_port(struct port *port) 150 { 151 if (port->slave == NULL) 152 return NULL; 153 154 return bond_get_bond_by_slave(port->slave); 155 } 156 157 /** 158 * __get_first_agg - get the first aggregator in the bond 159 * @bond: the bond we're looking at 160 * 161 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 162 * found. 163 * The caller must hold RCU or RTNL lock. 164 */ 165 static inline struct aggregator *__get_first_agg(struct port *port) 166 { 167 struct bonding *bond = __get_bond_by_port(port); 168 struct slave *first_slave; 169 struct aggregator *agg; 170 171 /* If there's no bond for this port, or bond has no slaves */ 172 if (bond == NULL) 173 return NULL; 174 175 rcu_read_lock(); 176 first_slave = bond_first_slave_rcu(bond); 177 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 178 rcu_read_unlock(); 179 180 return agg; 181 } 182 183 /** 184 * __agg_has_partner - see if we have a partner 185 * @agg: the agregator we're looking at 186 * 187 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 188 * address for the partner). Return 0 if not. 189 */ 190 static inline int __agg_has_partner(struct aggregator *agg) 191 { 192 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 193 } 194 195 /** 196 * __disable_port - disable the port's slave 197 * @port: the port we're looking at 198 */ 199 static inline void __disable_port(struct port *port) 200 { 201 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 202 } 203 204 /** 205 * __enable_port - enable the port's slave, if it's up 206 * @port: the port we're looking at 207 */ 208 static inline void __enable_port(struct port *port) 209 { 210 struct slave *slave = port->slave; 211 212 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 213 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 214 } 215 216 /** 217 * __port_is_enabled - check if the port's slave is in active state 218 * @port: the port we're looking at 219 */ 220 static inline int __port_is_enabled(struct port *port) 221 { 222 return bond_is_active_slave(port->slave); 223 } 224 225 /** 226 * __get_agg_selection_mode - get the aggregator selection mode 227 * @port: the port we're looking at 228 * 229 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 230 */ 231 static inline u32 __get_agg_selection_mode(struct port *port) 232 { 233 struct bonding *bond = __get_bond_by_port(port); 234 235 if (bond == NULL) 236 return BOND_AD_STABLE; 237 238 return bond->params.ad_select; 239 } 240 241 /** 242 * __check_agg_selection_timer - check if the selection timer has expired 243 * @port: the port we're looking at 244 */ 245 static inline int __check_agg_selection_timer(struct port *port) 246 { 247 struct bonding *bond = __get_bond_by_port(port); 248 249 if (bond == NULL) 250 return 0; 251 252 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 253 } 254 255 /** 256 * __get_link_speed - get a port's speed 257 * @port: the port we're looking at 258 * 259 * Return @port's speed in 802.3ad enum format. i.e. one of: 260 * 0, 261 * %AD_LINK_SPEED_10MBPS, 262 * %AD_LINK_SPEED_100MBPS, 263 * %AD_LINK_SPEED_1000MBPS, 264 * %AD_LINK_SPEED_2500MBPS, 265 * %AD_LINK_SPEED_5000MBPS, 266 * %AD_LINK_SPEED_10000MBPS 267 * %AD_LINK_SPEED_14000MBPS, 268 * %AD_LINK_SPEED_20000MBPS 269 * %AD_LINK_SPEED_25000MBPS 270 * %AD_LINK_SPEED_40000MBPS 271 * %AD_LINK_SPEED_50000MBPS 272 * %AD_LINK_SPEED_56000MBPS 273 * %AD_LINK_SPEED_100000MBPS 274 */ 275 static u16 __get_link_speed(struct port *port) 276 { 277 struct slave *slave = port->slave; 278 u16 speed; 279 280 /* this if covers only a special case: when the configuration starts 281 * with link down, it sets the speed to 0. 282 * This is done in spite of the fact that the e100 driver reports 0 283 * to be compatible with MVT in the future. 284 */ 285 if (slave->link != BOND_LINK_UP) 286 speed = 0; 287 else { 288 switch (slave->speed) { 289 case SPEED_10: 290 speed = AD_LINK_SPEED_10MBPS; 291 break; 292 293 case SPEED_100: 294 speed = AD_LINK_SPEED_100MBPS; 295 break; 296 297 case SPEED_1000: 298 speed = AD_LINK_SPEED_1000MBPS; 299 break; 300 301 case SPEED_2500: 302 speed = AD_LINK_SPEED_2500MBPS; 303 break; 304 305 case SPEED_5000: 306 speed = AD_LINK_SPEED_5000MBPS; 307 break; 308 309 case SPEED_10000: 310 speed = AD_LINK_SPEED_10000MBPS; 311 break; 312 313 case SPEED_14000: 314 speed = AD_LINK_SPEED_14000MBPS; 315 break; 316 317 case SPEED_20000: 318 speed = AD_LINK_SPEED_20000MBPS; 319 break; 320 321 case SPEED_25000: 322 speed = AD_LINK_SPEED_25000MBPS; 323 break; 324 325 case SPEED_40000: 326 speed = AD_LINK_SPEED_40000MBPS; 327 break; 328 329 case SPEED_50000: 330 speed = AD_LINK_SPEED_50000MBPS; 331 break; 332 333 case SPEED_56000: 334 speed = AD_LINK_SPEED_56000MBPS; 335 break; 336 337 case SPEED_100000: 338 speed = AD_LINK_SPEED_100000MBPS; 339 break; 340 341 default: 342 /* unknown speed value from ethtool. shouldn't happen */ 343 speed = 0; 344 break; 345 } 346 } 347 348 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 349 port->actor_port_number, speed); 350 return speed; 351 } 352 353 /** 354 * __get_duplex - get a port's duplex 355 * @port: the port we're looking at 356 * 357 * Return @port's duplex in 802.3ad bitmask format. i.e.: 358 * 0x01 if in full duplex 359 * 0x00 otherwise 360 */ 361 static u8 __get_duplex(struct port *port) 362 { 363 struct slave *slave = port->slave; 364 u8 retval = 0x0; 365 366 /* handling a special case: when the configuration starts with 367 * link down, it sets the duplex to 0. 368 */ 369 if (slave->link == BOND_LINK_UP) { 370 switch (slave->duplex) { 371 case DUPLEX_FULL: 372 retval = 0x1; 373 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 374 port->actor_port_number); 375 break; 376 case DUPLEX_HALF: 377 default: 378 retval = 0x0; 379 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 380 port->actor_port_number); 381 break; 382 } 383 } 384 return retval; 385 } 386 387 static void __ad_actor_update_port(struct port *port) 388 { 389 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 390 391 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 392 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 393 } 394 395 /* Conversions */ 396 397 /** 398 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 399 * @timer_type: which timer to operate 400 * @par: timer parameter. see below 401 * 402 * If @timer_type is %current_while_timer, @par indicates long/short timer. 403 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 404 * %SLOW_PERIODIC_TIME. 405 */ 406 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 407 { 408 u16 retval = 0; /* to silence the compiler */ 409 410 switch (timer_type) { 411 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 412 if (par) 413 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 414 else 415 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 416 break; 417 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 418 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 419 break; 420 case AD_PERIODIC_TIMER: /* for periodic machine */ 421 retval = (par*ad_ticks_per_sec); /* long timeout */ 422 break; 423 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 424 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 425 break; 426 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 427 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 428 break; 429 } 430 431 return retval; 432 } 433 434 435 /* ================= ad_rx_machine helper functions ================== */ 436 437 /** 438 * __choose_matched - update a port's matched variable from a received lacpdu 439 * @lacpdu: the lacpdu we've received 440 * @port: the port we're looking at 441 * 442 * Update the value of the matched variable, using parameter values from a 443 * newly received lacpdu. Parameter values for the partner carried in the 444 * received PDU are compared with the corresponding operational parameter 445 * values for the actor. Matched is set to TRUE if all of these parameters 446 * match and the PDU parameter partner_state.aggregation has the same value as 447 * actor_oper_port_state.aggregation and lacp will actively maintain the link 448 * in the aggregation. Matched is also set to TRUE if the value of 449 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 450 * an individual link and lacp will actively maintain the link. Otherwise, 451 * matched is set to FALSE. LACP is considered to be actively maintaining the 452 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 453 * the actor's actor_oper_port_state.lacp_activity and the PDU's 454 * partner_state.lacp_activity variables are TRUE. 455 * 456 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 457 * used here to implement the language from 802.3ad 43.4.9 that requires 458 * recordPDU to "match" the LACPDU parameters to the stored values. 459 */ 460 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 461 { 462 /* check if all parameters are alike 463 * or this is individual link(aggregation == FALSE) 464 * then update the state machine Matched variable. 465 */ 466 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 467 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 468 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 469 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 470 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 471 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 472 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 473 ) { 474 port->sm_vars |= AD_PORT_MATCHED; 475 } else { 476 port->sm_vars &= ~AD_PORT_MATCHED; 477 } 478 } 479 480 /** 481 * __record_pdu - record parameters from a received lacpdu 482 * @lacpdu: the lacpdu we've received 483 * @port: the port we're looking at 484 * 485 * Record the parameter values for the Actor carried in a received lacpdu as 486 * the current partner operational parameter values and sets 487 * actor_oper_port_state.defaulted to FALSE. 488 */ 489 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 490 { 491 if (lacpdu && port) { 492 struct port_params *partner = &port->partner_oper; 493 494 __choose_matched(lacpdu, port); 495 /* record the new parameter values for the partner 496 * operational 497 */ 498 partner->port_number = ntohs(lacpdu->actor_port); 499 partner->port_priority = ntohs(lacpdu->actor_port_priority); 500 partner->system = lacpdu->actor_system; 501 partner->system_priority = ntohs(lacpdu->actor_system_priority); 502 partner->key = ntohs(lacpdu->actor_key); 503 partner->port_state = lacpdu->actor_state; 504 505 /* set actor_oper_port_state.defaulted to FALSE */ 506 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 507 508 /* set the partner sync. to on if the partner is sync, 509 * and the port is matched 510 */ 511 if ((port->sm_vars & AD_PORT_MATCHED) && 512 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 513 partner->port_state |= AD_STATE_SYNCHRONIZATION; 514 pr_debug("%s partner sync=1\n", port->slave->dev->name); 515 } else { 516 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 517 pr_debug("%s partner sync=0\n", port->slave->dev->name); 518 } 519 } 520 } 521 522 /** 523 * __record_default - record default parameters 524 * @port: the port we're looking at 525 * 526 * This function records the default parameter values for the partner carried 527 * in the Partner Admin parameters as the current partner operational parameter 528 * values and sets actor_oper_port_state.defaulted to TRUE. 529 */ 530 static void __record_default(struct port *port) 531 { 532 if (port) { 533 /* record the partner admin parameters */ 534 memcpy(&port->partner_oper, &port->partner_admin, 535 sizeof(struct port_params)); 536 537 /* set actor_oper_port_state.defaulted to true */ 538 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 539 } 540 } 541 542 /** 543 * __update_selected - update a port's Selected variable from a received lacpdu 544 * @lacpdu: the lacpdu we've received 545 * @port: the port we're looking at 546 * 547 * Update the value of the selected variable, using parameter values from a 548 * newly received lacpdu. The parameter values for the Actor carried in the 549 * received PDU are compared with the corresponding operational parameter 550 * values for the ports partner. If one or more of the comparisons shows that 551 * the value(s) received in the PDU differ from the current operational values, 552 * then selected is set to FALSE and actor_oper_port_state.synchronization is 553 * set to out_of_sync. Otherwise, selected remains unchanged. 554 */ 555 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 556 { 557 if (lacpdu && port) { 558 const struct port_params *partner = &port->partner_oper; 559 560 /* check if any parameter is different then 561 * update the state machine selected variable. 562 */ 563 if (ntohs(lacpdu->actor_port) != partner->port_number || 564 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 565 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 566 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 567 ntohs(lacpdu->actor_key) != partner->key || 568 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 569 port->sm_vars &= ~AD_PORT_SELECTED; 570 } 571 } 572 } 573 574 /** 575 * __update_default_selected - update a port's Selected variable from Partner 576 * @port: the port we're looking at 577 * 578 * This function updates the value of the selected variable, using the partner 579 * administrative parameter values. The administrative values are compared with 580 * the corresponding operational parameter values for the partner. If one or 581 * more of the comparisons shows that the administrative value(s) differ from 582 * the current operational values, then Selected is set to FALSE and 583 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 584 * Selected remains unchanged. 585 */ 586 static void __update_default_selected(struct port *port) 587 { 588 if (port) { 589 const struct port_params *admin = &port->partner_admin; 590 const struct port_params *oper = &port->partner_oper; 591 592 /* check if any parameter is different then 593 * update the state machine selected variable. 594 */ 595 if (admin->port_number != oper->port_number || 596 admin->port_priority != oper->port_priority || 597 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 598 admin->system_priority != oper->system_priority || 599 admin->key != oper->key || 600 (admin->port_state & AD_STATE_AGGREGATION) 601 != (oper->port_state & AD_STATE_AGGREGATION)) { 602 port->sm_vars &= ~AD_PORT_SELECTED; 603 } 604 } 605 } 606 607 /** 608 * __update_ntt - update a port's ntt variable from a received lacpdu 609 * @lacpdu: the lacpdu we've received 610 * @port: the port we're looking at 611 * 612 * Updates the value of the ntt variable, using parameter values from a newly 613 * received lacpdu. The parameter values for the partner carried in the 614 * received PDU are compared with the corresponding operational parameter 615 * values for the Actor. If one or more of the comparisons shows that the 616 * value(s) received in the PDU differ from the current operational values, 617 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 618 */ 619 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 620 { 621 /* validate lacpdu and port */ 622 if (lacpdu && port) { 623 /* check if any parameter is different then 624 * update the port->ntt. 625 */ 626 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 627 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 628 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 629 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 630 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 631 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 632 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 633 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 634 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 635 ) { 636 port->ntt = true; 637 } 638 } 639 } 640 641 /** 642 * __agg_ports_are_ready - check if all ports in an aggregator are ready 643 * @aggregator: the aggregator we're looking at 644 * 645 */ 646 static int __agg_ports_are_ready(struct aggregator *aggregator) 647 { 648 struct port *port; 649 int retval = 1; 650 651 if (aggregator) { 652 /* scan all ports in this aggregator to verfy if they are 653 * all ready. 654 */ 655 for (port = aggregator->lag_ports; 656 port; 657 port = port->next_port_in_aggregator) { 658 if (!(port->sm_vars & AD_PORT_READY_N)) { 659 retval = 0; 660 break; 661 } 662 } 663 } 664 665 return retval; 666 } 667 668 /** 669 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 670 * @aggregator: the aggregator we're looking at 671 * @val: Should the ports' ready bit be set on or off 672 * 673 */ 674 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 675 { 676 struct port *port; 677 678 for (port = aggregator->lag_ports; port; 679 port = port->next_port_in_aggregator) { 680 if (val) 681 port->sm_vars |= AD_PORT_READY; 682 else 683 port->sm_vars &= ~AD_PORT_READY; 684 } 685 } 686 687 static int __agg_active_ports(struct aggregator *agg) 688 { 689 struct port *port; 690 int active = 0; 691 692 for (port = agg->lag_ports; port; 693 port = port->next_port_in_aggregator) { 694 if (port->is_enabled) 695 active++; 696 } 697 698 return active; 699 } 700 701 /** 702 * __get_agg_bandwidth - get the total bandwidth of an aggregator 703 * @aggregator: the aggregator we're looking at 704 * 705 */ 706 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 707 { 708 int nports = __agg_active_ports(aggregator); 709 u32 bandwidth = 0; 710 711 if (nports) { 712 switch (__get_link_speed(aggregator->lag_ports)) { 713 case AD_LINK_SPEED_1MBPS: 714 bandwidth = nports; 715 break; 716 case AD_LINK_SPEED_10MBPS: 717 bandwidth = nports * 10; 718 break; 719 case AD_LINK_SPEED_100MBPS: 720 bandwidth = nports * 100; 721 break; 722 case AD_LINK_SPEED_1000MBPS: 723 bandwidth = nports * 1000; 724 break; 725 case AD_LINK_SPEED_2500MBPS: 726 bandwidth = nports * 2500; 727 break; 728 case AD_LINK_SPEED_5000MBPS: 729 bandwidth = nports * 5000; 730 break; 731 case AD_LINK_SPEED_10000MBPS: 732 bandwidth = nports * 10000; 733 break; 734 case AD_LINK_SPEED_14000MBPS: 735 bandwidth = nports * 14000; 736 break; 737 case AD_LINK_SPEED_20000MBPS: 738 bandwidth = nports * 20000; 739 break; 740 case AD_LINK_SPEED_25000MBPS: 741 bandwidth = nports * 25000; 742 break; 743 case AD_LINK_SPEED_40000MBPS: 744 bandwidth = nports * 40000; 745 break; 746 case AD_LINK_SPEED_50000MBPS: 747 bandwidth = nports * 50000; 748 break; 749 case AD_LINK_SPEED_56000MBPS: 750 bandwidth = nports * 56000; 751 break; 752 case AD_LINK_SPEED_100000MBPS: 753 bandwidth = nports * 100000; 754 break; 755 default: 756 bandwidth = 0; /* to silence the compiler */ 757 } 758 } 759 return bandwidth; 760 } 761 762 /** 763 * __get_active_agg - get the current active aggregator 764 * @aggregator: the aggregator we're looking at 765 * 766 * Caller must hold RCU lock. 767 */ 768 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 769 { 770 struct bonding *bond = aggregator->slave->bond; 771 struct list_head *iter; 772 struct slave *slave; 773 774 bond_for_each_slave_rcu(bond, slave, iter) 775 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 776 return &(SLAVE_AD_INFO(slave)->aggregator); 777 778 return NULL; 779 } 780 781 /** 782 * __update_lacpdu_from_port - update a port's lacpdu fields 783 * @port: the port we're looking at 784 */ 785 static inline void __update_lacpdu_from_port(struct port *port) 786 { 787 struct lacpdu *lacpdu = &port->lacpdu; 788 const struct port_params *partner = &port->partner_oper; 789 790 /* update current actual Actor parameters 791 * lacpdu->subtype initialized 792 * lacpdu->version_number initialized 793 * lacpdu->tlv_type_actor_info initialized 794 * lacpdu->actor_information_length initialized 795 */ 796 797 lacpdu->actor_system_priority = htons(port->actor_system_priority); 798 lacpdu->actor_system = port->actor_system; 799 lacpdu->actor_key = htons(port->actor_oper_port_key); 800 lacpdu->actor_port_priority = htons(port->actor_port_priority); 801 lacpdu->actor_port = htons(port->actor_port_number); 802 lacpdu->actor_state = port->actor_oper_port_state; 803 pr_debug("update lacpdu: %s, actor port state %x\n", 804 port->slave->dev->name, port->actor_oper_port_state); 805 806 /* lacpdu->reserved_3_1 initialized 807 * lacpdu->tlv_type_partner_info initialized 808 * lacpdu->partner_information_length initialized 809 */ 810 811 lacpdu->partner_system_priority = htons(partner->system_priority); 812 lacpdu->partner_system = partner->system; 813 lacpdu->partner_key = htons(partner->key); 814 lacpdu->partner_port_priority = htons(partner->port_priority); 815 lacpdu->partner_port = htons(partner->port_number); 816 lacpdu->partner_state = partner->port_state; 817 818 /* lacpdu->reserved_3_2 initialized 819 * lacpdu->tlv_type_collector_info initialized 820 * lacpdu->collector_information_length initialized 821 * collector_max_delay initialized 822 * reserved_12[12] initialized 823 * tlv_type_terminator initialized 824 * terminator_length initialized 825 * reserved_50[50] initialized 826 */ 827 } 828 829 /* ================= main 802.3ad protocol code ========================= */ 830 831 /** 832 * ad_lacpdu_send - send out a lacpdu packet on a given port 833 * @port: the port we're looking at 834 * 835 * Returns: 0 on success 836 * < 0 on error 837 */ 838 static int ad_lacpdu_send(struct port *port) 839 { 840 struct slave *slave = port->slave; 841 struct sk_buff *skb; 842 struct lacpdu_header *lacpdu_header; 843 int length = sizeof(struct lacpdu_header); 844 845 skb = dev_alloc_skb(length); 846 if (!skb) 847 return -ENOMEM; 848 849 skb->dev = slave->dev; 850 skb_reset_mac_header(skb); 851 skb->network_header = skb->mac_header + ETH_HLEN; 852 skb->protocol = PKT_TYPE_LACPDU; 853 skb->priority = TC_PRIO_CONTROL; 854 855 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); 856 857 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 858 /* Note: source address is set to be the member's PERMANENT address, 859 * because we use it to identify loopback lacpdus in receive. 860 */ 861 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 862 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 863 864 lacpdu_header->lacpdu = port->lacpdu; 865 866 dev_queue_xmit(skb); 867 868 return 0; 869 } 870 871 /** 872 * ad_marker_send - send marker information/response on a given port 873 * @port: the port we're looking at 874 * @marker: marker data to send 875 * 876 * Returns: 0 on success 877 * < 0 on error 878 */ 879 static int ad_marker_send(struct port *port, struct bond_marker *marker) 880 { 881 struct slave *slave = port->slave; 882 struct sk_buff *skb; 883 struct bond_marker_header *marker_header; 884 int length = sizeof(struct bond_marker_header); 885 886 skb = dev_alloc_skb(length + 16); 887 if (!skb) 888 return -ENOMEM; 889 890 skb_reserve(skb, 16); 891 892 skb->dev = slave->dev; 893 skb_reset_mac_header(skb); 894 skb->network_header = skb->mac_header + ETH_HLEN; 895 skb->protocol = PKT_TYPE_LACPDU; 896 897 marker_header = (struct bond_marker_header *)skb_put(skb, length); 898 899 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 900 /* Note: source address is set to be the member's PERMANENT address, 901 * because we use it to identify loopback MARKERs in receive. 902 */ 903 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 904 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 905 906 marker_header->marker = *marker; 907 908 dev_queue_xmit(skb); 909 910 return 0; 911 } 912 913 /** 914 * ad_mux_machine - handle a port's mux state machine 915 * @port: the port we're looking at 916 * @update_slave_arr: Does slave array need update? 917 */ 918 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 919 { 920 mux_states_t last_state; 921 922 /* keep current State Machine state to compare later if it was 923 * changed 924 */ 925 last_state = port->sm_mux_state; 926 927 if (port->sm_vars & AD_PORT_BEGIN) { 928 port->sm_mux_state = AD_MUX_DETACHED; 929 } else { 930 switch (port->sm_mux_state) { 931 case AD_MUX_DETACHED: 932 if ((port->sm_vars & AD_PORT_SELECTED) 933 || (port->sm_vars & AD_PORT_STANDBY)) 934 /* if SELECTED or STANDBY */ 935 port->sm_mux_state = AD_MUX_WAITING; 936 break; 937 case AD_MUX_WAITING: 938 /* if SELECTED == FALSE return to DETACH state */ 939 if (!(port->sm_vars & AD_PORT_SELECTED)) { 940 port->sm_vars &= ~AD_PORT_READY_N; 941 /* in order to withhold the Selection Logic to 942 * check all ports READY_N value every callback 943 * cycle to update ready variable, we check 944 * READY_N and update READY here 945 */ 946 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 947 port->sm_mux_state = AD_MUX_DETACHED; 948 break; 949 } 950 951 /* check if the wait_while_timer expired */ 952 if (port->sm_mux_timer_counter 953 && !(--port->sm_mux_timer_counter)) 954 port->sm_vars |= AD_PORT_READY_N; 955 956 /* in order to withhold the selection logic to check 957 * all ports READY_N value every callback cycle to 958 * update ready variable, we check READY_N and update 959 * READY here 960 */ 961 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 962 963 /* if the wait_while_timer expired, and the port is 964 * in READY state, move to ATTACHED state 965 */ 966 if ((port->sm_vars & AD_PORT_READY) 967 && !port->sm_mux_timer_counter) 968 port->sm_mux_state = AD_MUX_ATTACHED; 969 break; 970 case AD_MUX_ATTACHED: 971 /* check also if agg_select_timer expired (so the 972 * edable port will take place only after this timer) 973 */ 974 if ((port->sm_vars & AD_PORT_SELECTED) && 975 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 976 !__check_agg_selection_timer(port)) { 977 if (port->aggregator->is_active) 978 port->sm_mux_state = 979 AD_MUX_COLLECTING_DISTRIBUTING; 980 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 981 (port->sm_vars & AD_PORT_STANDBY)) { 982 /* if UNSELECTED or STANDBY */ 983 port->sm_vars &= ~AD_PORT_READY_N; 984 /* in order to withhold the selection logic to 985 * check all ports READY_N value every callback 986 * cycle to update ready variable, we check 987 * READY_N and update READY here 988 */ 989 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 990 port->sm_mux_state = AD_MUX_DETACHED; 991 } else if (port->aggregator->is_active) { 992 port->actor_oper_port_state |= 993 AD_STATE_SYNCHRONIZATION; 994 } 995 break; 996 case AD_MUX_COLLECTING_DISTRIBUTING: 997 if (!(port->sm_vars & AD_PORT_SELECTED) || 998 (port->sm_vars & AD_PORT_STANDBY) || 999 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 1000 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 1001 port->sm_mux_state = AD_MUX_ATTACHED; 1002 } else { 1003 /* if port state hasn't changed make 1004 * sure that a collecting distributing 1005 * port in an active aggregator is enabled 1006 */ 1007 if (port->aggregator && 1008 port->aggregator->is_active && 1009 !__port_is_enabled(port)) { 1010 1011 __enable_port(port); 1012 } 1013 } 1014 break; 1015 default: 1016 break; 1017 } 1018 } 1019 1020 /* check if the state machine was changed */ 1021 if (port->sm_mux_state != last_state) { 1022 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1023 port->actor_port_number, 1024 port->slave->dev->name, 1025 last_state, 1026 port->sm_mux_state); 1027 switch (port->sm_mux_state) { 1028 case AD_MUX_DETACHED: 1029 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1030 ad_disable_collecting_distributing(port, 1031 update_slave_arr); 1032 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1033 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1034 port->ntt = true; 1035 break; 1036 case AD_MUX_WAITING: 1037 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1038 break; 1039 case AD_MUX_ATTACHED: 1040 if (port->aggregator->is_active) 1041 port->actor_oper_port_state |= 1042 AD_STATE_SYNCHRONIZATION; 1043 else 1044 port->actor_oper_port_state &= 1045 ~AD_STATE_SYNCHRONIZATION; 1046 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1047 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1048 ad_disable_collecting_distributing(port, 1049 update_slave_arr); 1050 port->ntt = true; 1051 break; 1052 case AD_MUX_COLLECTING_DISTRIBUTING: 1053 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1054 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1055 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1056 ad_enable_collecting_distributing(port, 1057 update_slave_arr); 1058 port->ntt = true; 1059 break; 1060 default: 1061 break; 1062 } 1063 } 1064 } 1065 1066 /** 1067 * ad_rx_machine - handle a port's rx State Machine 1068 * @lacpdu: the lacpdu we've received 1069 * @port: the port we're looking at 1070 * 1071 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1072 * CURRENT. If timer expired set the state machine in the proper state. 1073 * In other cases, this function checks if we need to switch to other state. 1074 */ 1075 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1076 { 1077 rx_states_t last_state; 1078 1079 /* keep current State Machine state to compare later if it was 1080 * changed 1081 */ 1082 last_state = port->sm_rx_state; 1083 1084 /* check if state machine should change state */ 1085 1086 /* first, check if port was reinitialized */ 1087 if (port->sm_vars & AD_PORT_BEGIN) { 1088 port->sm_rx_state = AD_RX_INITIALIZE; 1089 port->sm_vars |= AD_PORT_CHURNED; 1090 /* check if port is not enabled */ 1091 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1092 port->sm_rx_state = AD_RX_PORT_DISABLED; 1093 /* check if new lacpdu arrived */ 1094 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1095 (port->sm_rx_state == AD_RX_DEFAULTED) || 1096 (port->sm_rx_state == AD_RX_CURRENT))) { 1097 if (port->sm_rx_state != AD_RX_CURRENT) 1098 port->sm_vars |= AD_PORT_CHURNED; 1099 port->sm_rx_timer_counter = 0; 1100 port->sm_rx_state = AD_RX_CURRENT; 1101 } else { 1102 /* if timer is on, and if it is expired */ 1103 if (port->sm_rx_timer_counter && 1104 !(--port->sm_rx_timer_counter)) { 1105 switch (port->sm_rx_state) { 1106 case AD_RX_EXPIRED: 1107 port->sm_rx_state = AD_RX_DEFAULTED; 1108 break; 1109 case AD_RX_CURRENT: 1110 port->sm_rx_state = AD_RX_EXPIRED; 1111 break; 1112 default: 1113 break; 1114 } 1115 } else { 1116 /* if no lacpdu arrived and no timer is on */ 1117 switch (port->sm_rx_state) { 1118 case AD_RX_PORT_DISABLED: 1119 if (port->is_enabled && 1120 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1121 port->sm_rx_state = AD_RX_EXPIRED; 1122 else if (port->is_enabled 1123 && ((port->sm_vars 1124 & AD_PORT_LACP_ENABLED) == 0)) 1125 port->sm_rx_state = AD_RX_LACP_DISABLED; 1126 break; 1127 default: 1128 break; 1129 1130 } 1131 } 1132 } 1133 1134 /* check if the State machine was changed or new lacpdu arrived */ 1135 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1136 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1137 port->actor_port_number, 1138 port->slave->dev->name, 1139 last_state, 1140 port->sm_rx_state); 1141 switch (port->sm_rx_state) { 1142 case AD_RX_INITIALIZE: 1143 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1144 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1145 else 1146 port->sm_vars |= AD_PORT_LACP_ENABLED; 1147 port->sm_vars &= ~AD_PORT_SELECTED; 1148 __record_default(port); 1149 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1150 port->sm_rx_state = AD_RX_PORT_DISABLED; 1151 1152 /* Fall Through */ 1153 case AD_RX_PORT_DISABLED: 1154 port->sm_vars &= ~AD_PORT_MATCHED; 1155 break; 1156 case AD_RX_LACP_DISABLED: 1157 port->sm_vars &= ~AD_PORT_SELECTED; 1158 __record_default(port); 1159 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1160 port->sm_vars |= AD_PORT_MATCHED; 1161 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1162 break; 1163 case AD_RX_EXPIRED: 1164 /* Reset of the Synchronization flag (Standard 43.4.12) 1165 * This reset cause to disable this port in the 1166 * COLLECTING_DISTRIBUTING state of the mux machine in 1167 * case of EXPIRED even if LINK_DOWN didn't arrive for 1168 * the port. 1169 */ 1170 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1171 port->sm_vars &= ~AD_PORT_MATCHED; 1172 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1173 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1174 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1175 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1176 port->sm_vars |= AD_PORT_CHURNED; 1177 break; 1178 case AD_RX_DEFAULTED: 1179 __update_default_selected(port); 1180 __record_default(port); 1181 port->sm_vars |= AD_PORT_MATCHED; 1182 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1183 break; 1184 case AD_RX_CURRENT: 1185 /* detect loopback situation */ 1186 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1187 &(port->actor_system))) { 1188 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1189 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1190 port->slave->dev->name); 1191 return; 1192 } 1193 __update_selected(lacpdu, port); 1194 __update_ntt(lacpdu, port); 1195 __record_pdu(lacpdu, port); 1196 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1197 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1198 break; 1199 default: 1200 break; 1201 } 1202 } 1203 } 1204 1205 /** 1206 * ad_churn_machine - handle port churn's state machine 1207 * @port: the port we're looking at 1208 * 1209 */ 1210 static void ad_churn_machine(struct port *port) 1211 { 1212 if (port->sm_vars & AD_PORT_CHURNED) { 1213 port->sm_vars &= ~AD_PORT_CHURNED; 1214 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1215 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1216 port->sm_churn_actor_timer_counter = 1217 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1218 port->sm_churn_partner_timer_counter = 1219 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1220 return; 1221 } 1222 if (port->sm_churn_actor_timer_counter && 1223 !(--port->sm_churn_actor_timer_counter) && 1224 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1225 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1226 port->sm_churn_actor_state = AD_NO_CHURN; 1227 } else { 1228 port->churn_actor_count++; 1229 port->sm_churn_actor_state = AD_CHURN; 1230 } 1231 } 1232 if (port->sm_churn_partner_timer_counter && 1233 !(--port->sm_churn_partner_timer_counter) && 1234 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1235 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1236 port->sm_churn_partner_state = AD_NO_CHURN; 1237 } else { 1238 port->churn_partner_count++; 1239 port->sm_churn_partner_state = AD_CHURN; 1240 } 1241 } 1242 } 1243 1244 /** 1245 * ad_tx_machine - handle a port's tx state machine 1246 * @port: the port we're looking at 1247 */ 1248 static void ad_tx_machine(struct port *port) 1249 { 1250 /* check if tx timer expired, to verify that we do not send more than 1251 * 3 packets per second 1252 */ 1253 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1254 /* check if there is something to send */ 1255 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1256 __update_lacpdu_from_port(port); 1257 1258 if (ad_lacpdu_send(port) >= 0) { 1259 pr_debug("Sent LACPDU on port %d\n", 1260 port->actor_port_number); 1261 1262 /* mark ntt as false, so it will not be sent 1263 * again until demanded 1264 */ 1265 port->ntt = false; 1266 } 1267 } 1268 /* restart tx timer(to verify that we will not exceed 1269 * AD_MAX_TX_IN_SECOND 1270 */ 1271 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1272 } 1273 } 1274 1275 /** 1276 * ad_periodic_machine - handle a port's periodic state machine 1277 * @port: the port we're looking at 1278 * 1279 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1280 */ 1281 static void ad_periodic_machine(struct port *port) 1282 { 1283 periodic_states_t last_state; 1284 1285 /* keep current state machine state to compare later if it was changed */ 1286 last_state = port->sm_periodic_state; 1287 1288 /* check if port was reinitialized */ 1289 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1290 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1291 ) { 1292 port->sm_periodic_state = AD_NO_PERIODIC; 1293 } 1294 /* check if state machine should change state */ 1295 else if (port->sm_periodic_timer_counter) { 1296 /* check if periodic state machine expired */ 1297 if (!(--port->sm_periodic_timer_counter)) { 1298 /* if expired then do tx */ 1299 port->sm_periodic_state = AD_PERIODIC_TX; 1300 } else { 1301 /* If not expired, check if there is some new timeout 1302 * parameter from the partner state 1303 */ 1304 switch (port->sm_periodic_state) { 1305 case AD_FAST_PERIODIC: 1306 if (!(port->partner_oper.port_state 1307 & AD_STATE_LACP_TIMEOUT)) 1308 port->sm_periodic_state = AD_SLOW_PERIODIC; 1309 break; 1310 case AD_SLOW_PERIODIC: 1311 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1312 port->sm_periodic_timer_counter = 0; 1313 port->sm_periodic_state = AD_PERIODIC_TX; 1314 } 1315 break; 1316 default: 1317 break; 1318 } 1319 } 1320 } else { 1321 switch (port->sm_periodic_state) { 1322 case AD_NO_PERIODIC: 1323 port->sm_periodic_state = AD_FAST_PERIODIC; 1324 break; 1325 case AD_PERIODIC_TX: 1326 if (!(port->partner_oper.port_state & 1327 AD_STATE_LACP_TIMEOUT)) 1328 port->sm_periodic_state = AD_SLOW_PERIODIC; 1329 else 1330 port->sm_periodic_state = AD_FAST_PERIODIC; 1331 break; 1332 default: 1333 break; 1334 } 1335 } 1336 1337 /* check if the state machine was changed */ 1338 if (port->sm_periodic_state != last_state) { 1339 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1340 port->actor_port_number, last_state, 1341 port->sm_periodic_state); 1342 switch (port->sm_periodic_state) { 1343 case AD_NO_PERIODIC: 1344 port->sm_periodic_timer_counter = 0; 1345 break; 1346 case AD_FAST_PERIODIC: 1347 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1348 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1349 break; 1350 case AD_SLOW_PERIODIC: 1351 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1352 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1353 break; 1354 case AD_PERIODIC_TX: 1355 port->ntt = true; 1356 break; 1357 default: 1358 break; 1359 } 1360 } 1361 } 1362 1363 /** 1364 * ad_port_selection_logic - select aggregation groups 1365 * @port: the port we're looking at 1366 * @update_slave_arr: Does slave array need update? 1367 * 1368 * Select aggregation groups, and assign each port for it's aggregetor. The 1369 * selection logic is called in the inititalization (after all the handshkes), 1370 * and after every lacpdu receive (if selected is off). 1371 */ 1372 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1373 { 1374 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1375 struct port *last_port = NULL, *curr_port; 1376 struct list_head *iter; 1377 struct bonding *bond; 1378 struct slave *slave; 1379 int found = 0; 1380 1381 /* if the port is already Selected, do nothing */ 1382 if (port->sm_vars & AD_PORT_SELECTED) 1383 return; 1384 1385 bond = __get_bond_by_port(port); 1386 1387 /* if the port is connected to other aggregator, detach it */ 1388 if (port->aggregator) { 1389 /* detach the port from its former aggregator */ 1390 temp_aggregator = port->aggregator; 1391 for (curr_port = temp_aggregator->lag_ports; curr_port; 1392 last_port = curr_port, 1393 curr_port = curr_port->next_port_in_aggregator) { 1394 if (curr_port == port) { 1395 temp_aggregator->num_of_ports--; 1396 /* if it is the first port attached to the 1397 * aggregator 1398 */ 1399 if (!last_port) { 1400 temp_aggregator->lag_ports = 1401 port->next_port_in_aggregator; 1402 } else { 1403 /* not the first port attached to the 1404 * aggregator 1405 */ 1406 last_port->next_port_in_aggregator = 1407 port->next_port_in_aggregator; 1408 } 1409 1410 /* clear the port's relations to this 1411 * aggregator 1412 */ 1413 port->aggregator = NULL; 1414 port->next_port_in_aggregator = NULL; 1415 port->actor_port_aggregator_identifier = 0; 1416 1417 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1418 port->actor_port_number, 1419 temp_aggregator->aggregator_identifier); 1420 /* if the aggregator is empty, clear its 1421 * parameters, and set it ready to be attached 1422 */ 1423 if (!temp_aggregator->lag_ports) 1424 ad_clear_agg(temp_aggregator); 1425 break; 1426 } 1427 } 1428 if (!curr_port) { 1429 /* meaning: the port was related to an aggregator 1430 * but was not on the aggregator port list 1431 */ 1432 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1433 port->slave->bond->dev->name, 1434 port->actor_port_number, 1435 port->slave->dev->name, 1436 port->aggregator->aggregator_identifier); 1437 } 1438 } 1439 /* search on all aggregators for a suitable aggregator for this port */ 1440 bond_for_each_slave(bond, slave, iter) { 1441 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1442 1443 /* keep a free aggregator for later use(if needed) */ 1444 if (!aggregator->lag_ports) { 1445 if (!free_aggregator) 1446 free_aggregator = aggregator; 1447 continue; 1448 } 1449 /* check if current aggregator suits us */ 1450 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1451 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1452 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1453 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1454 ) && 1455 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1456 !aggregator->is_individual) /* but is not individual OR */ 1457 ) 1458 ) { 1459 /* attach to the founded aggregator */ 1460 port->aggregator = aggregator; 1461 port->actor_port_aggregator_identifier = 1462 port->aggregator->aggregator_identifier; 1463 port->next_port_in_aggregator = aggregator->lag_ports; 1464 port->aggregator->num_of_ports++; 1465 aggregator->lag_ports = port; 1466 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1467 port->actor_port_number, 1468 port->aggregator->aggregator_identifier); 1469 1470 /* mark this port as selected */ 1471 port->sm_vars |= AD_PORT_SELECTED; 1472 found = 1; 1473 break; 1474 } 1475 } 1476 1477 /* the port couldn't find an aggregator - attach it to a new 1478 * aggregator 1479 */ 1480 if (!found) { 1481 if (free_aggregator) { 1482 /* assign port a new aggregator */ 1483 port->aggregator = free_aggregator; 1484 port->actor_port_aggregator_identifier = 1485 port->aggregator->aggregator_identifier; 1486 1487 /* update the new aggregator's parameters 1488 * if port was responsed from the end-user 1489 */ 1490 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1491 /* if port is full duplex */ 1492 port->aggregator->is_individual = false; 1493 else 1494 port->aggregator->is_individual = true; 1495 1496 port->aggregator->actor_admin_aggregator_key = 1497 port->actor_admin_port_key; 1498 port->aggregator->actor_oper_aggregator_key = 1499 port->actor_oper_port_key; 1500 port->aggregator->partner_system = 1501 port->partner_oper.system; 1502 port->aggregator->partner_system_priority = 1503 port->partner_oper.system_priority; 1504 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1505 port->aggregator->receive_state = 1; 1506 port->aggregator->transmit_state = 1; 1507 port->aggregator->lag_ports = port; 1508 port->aggregator->num_of_ports++; 1509 1510 /* mark this port as selected */ 1511 port->sm_vars |= AD_PORT_SELECTED; 1512 1513 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1514 port->actor_port_number, 1515 port->aggregator->aggregator_identifier); 1516 } else { 1517 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1518 port->actor_port_number, port->slave->dev->name); 1519 } 1520 } 1521 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1522 * in all aggregator's ports, else set ready=FALSE in all 1523 * aggregator's ports 1524 */ 1525 __set_agg_ports_ready(port->aggregator, 1526 __agg_ports_are_ready(port->aggregator)); 1527 1528 aggregator = __get_first_agg(port); 1529 ad_agg_selection_logic(aggregator, update_slave_arr); 1530 1531 if (!port->aggregator->is_active) 1532 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1533 } 1534 1535 /* Decide if "agg" is a better choice for the new active aggregator that 1536 * the current best, according to the ad_select policy. 1537 */ 1538 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1539 struct aggregator *curr) 1540 { 1541 /* 0. If no best, select current. 1542 * 1543 * 1. If the current agg is not individual, and the best is 1544 * individual, select current. 1545 * 1546 * 2. If current agg is individual and the best is not, keep best. 1547 * 1548 * 3. Therefore, current and best are both individual or both not 1549 * individual, so: 1550 * 1551 * 3a. If current agg partner replied, and best agg partner did not, 1552 * select current. 1553 * 1554 * 3b. If current agg partner did not reply and best agg partner 1555 * did reply, keep best. 1556 * 1557 * 4. Therefore, current and best both have partner replies or 1558 * both do not, so perform selection policy: 1559 * 1560 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1561 * select by bandwidth. 1562 * 1563 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1564 */ 1565 if (!best) 1566 return curr; 1567 1568 if (!curr->is_individual && best->is_individual) 1569 return curr; 1570 1571 if (curr->is_individual && !best->is_individual) 1572 return best; 1573 1574 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1575 return curr; 1576 1577 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1578 return best; 1579 1580 switch (__get_agg_selection_mode(curr->lag_ports)) { 1581 case BOND_AD_COUNT: 1582 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1583 return curr; 1584 1585 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1586 return best; 1587 1588 /*FALLTHROUGH*/ 1589 case BOND_AD_STABLE: 1590 case BOND_AD_BANDWIDTH: 1591 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1592 return curr; 1593 1594 break; 1595 1596 default: 1597 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1598 curr->slave->bond->dev->name, 1599 __get_agg_selection_mode(curr->lag_ports)); 1600 break; 1601 } 1602 1603 return best; 1604 } 1605 1606 static int agg_device_up(const struct aggregator *agg) 1607 { 1608 struct port *port = agg->lag_ports; 1609 1610 if (!port) 1611 return 0; 1612 1613 for (port = agg->lag_ports; port; 1614 port = port->next_port_in_aggregator) { 1615 if (netif_running(port->slave->dev) && 1616 netif_carrier_ok(port->slave->dev)) 1617 return 1; 1618 } 1619 1620 return 0; 1621 } 1622 1623 /** 1624 * ad_agg_selection_logic - select an aggregation group for a team 1625 * @aggregator: the aggregator we're looking at 1626 * @update_slave_arr: Does slave array need update? 1627 * 1628 * It is assumed that only one aggregator may be selected for a team. 1629 * 1630 * The logic of this function is to select the aggregator according to 1631 * the ad_select policy: 1632 * 1633 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1634 * it, and to reselect the active aggregator only if the previous 1635 * aggregator has no more ports related to it. 1636 * 1637 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1638 * bandwidth, and reselect whenever a link state change takes place or the 1639 * set of slaves in the bond changes. 1640 * 1641 * BOND_AD_COUNT: select the aggregator with largest number of ports 1642 * (slaves), and reselect whenever a link state change takes place or the 1643 * set of slaves in the bond changes. 1644 * 1645 * FIXME: this function MUST be called with the first agg in the bond, or 1646 * __get_active_agg() won't work correctly. This function should be better 1647 * called with the bond itself, and retrieve the first agg from it. 1648 */ 1649 static void ad_agg_selection_logic(struct aggregator *agg, 1650 bool *update_slave_arr) 1651 { 1652 struct aggregator *best, *active, *origin; 1653 struct bonding *bond = agg->slave->bond; 1654 struct list_head *iter; 1655 struct slave *slave; 1656 struct port *port; 1657 1658 rcu_read_lock(); 1659 origin = agg; 1660 active = __get_active_agg(agg); 1661 best = (active && agg_device_up(active)) ? active : NULL; 1662 1663 bond_for_each_slave_rcu(bond, slave, iter) { 1664 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1665 1666 agg->is_active = 0; 1667 1668 if (__agg_active_ports(agg) && agg_device_up(agg)) 1669 best = ad_agg_selection_test(best, agg); 1670 } 1671 1672 if (best && 1673 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1674 /* For the STABLE policy, don't replace the old active 1675 * aggregator if it's still active (it has an answering 1676 * partner) or if both the best and active don't have an 1677 * answering partner. 1678 */ 1679 if (active && active->lag_ports && 1680 __agg_active_ports(active) && 1681 (__agg_has_partner(active) || 1682 (!__agg_has_partner(active) && 1683 !__agg_has_partner(best)))) { 1684 if (!(!active->actor_oper_aggregator_key && 1685 best->actor_oper_aggregator_key)) { 1686 best = NULL; 1687 active->is_active = 1; 1688 } 1689 } 1690 } 1691 1692 if (best && (best == active)) { 1693 best = NULL; 1694 active->is_active = 1; 1695 } 1696 1697 /* if there is new best aggregator, activate it */ 1698 if (best) { 1699 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1700 best->aggregator_identifier, best->num_of_ports, 1701 best->actor_oper_aggregator_key, 1702 best->partner_oper_aggregator_key, 1703 best->is_individual, best->is_active); 1704 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1705 best->lag_ports, best->slave, 1706 best->slave ? best->slave->dev->name : "NULL"); 1707 1708 bond_for_each_slave_rcu(bond, slave, iter) { 1709 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1710 1711 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1712 agg->aggregator_identifier, agg->num_of_ports, 1713 agg->actor_oper_aggregator_key, 1714 agg->partner_oper_aggregator_key, 1715 agg->is_individual, agg->is_active); 1716 } 1717 1718 /* check if any partner replys */ 1719 if (best->is_individual) { 1720 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1721 best->slave ? 1722 best->slave->bond->dev->name : "NULL"); 1723 } 1724 1725 best->is_active = 1; 1726 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1727 best->aggregator_identifier); 1728 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1729 best->aggregator_identifier, best->num_of_ports, 1730 best->actor_oper_aggregator_key, 1731 best->partner_oper_aggregator_key, 1732 best->is_individual, best->is_active); 1733 1734 /* disable the ports that were related to the former 1735 * active_aggregator 1736 */ 1737 if (active) { 1738 for (port = active->lag_ports; port; 1739 port = port->next_port_in_aggregator) { 1740 __disable_port(port); 1741 } 1742 } 1743 /* Slave array needs update. */ 1744 *update_slave_arr = true; 1745 } 1746 1747 /* if the selected aggregator is of join individuals 1748 * (partner_system is NULL), enable their ports 1749 */ 1750 active = __get_active_agg(origin); 1751 1752 if (active) { 1753 if (!__agg_has_partner(active)) { 1754 for (port = active->lag_ports; port; 1755 port = port->next_port_in_aggregator) { 1756 __enable_port(port); 1757 } 1758 } 1759 } 1760 1761 rcu_read_unlock(); 1762 1763 bond_3ad_set_carrier(bond); 1764 } 1765 1766 /** 1767 * ad_clear_agg - clear a given aggregator's parameters 1768 * @aggregator: the aggregator we're looking at 1769 */ 1770 static void ad_clear_agg(struct aggregator *aggregator) 1771 { 1772 if (aggregator) { 1773 aggregator->is_individual = false; 1774 aggregator->actor_admin_aggregator_key = 0; 1775 aggregator->actor_oper_aggregator_key = 0; 1776 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1777 aggregator->partner_system_priority = 0; 1778 aggregator->partner_oper_aggregator_key = 0; 1779 aggregator->receive_state = 0; 1780 aggregator->transmit_state = 0; 1781 aggregator->lag_ports = NULL; 1782 aggregator->is_active = 0; 1783 aggregator->num_of_ports = 0; 1784 pr_debug("LAG %d was cleared\n", 1785 aggregator->aggregator_identifier); 1786 } 1787 } 1788 1789 /** 1790 * ad_initialize_agg - initialize a given aggregator's parameters 1791 * @aggregator: the aggregator we're looking at 1792 */ 1793 static void ad_initialize_agg(struct aggregator *aggregator) 1794 { 1795 if (aggregator) { 1796 ad_clear_agg(aggregator); 1797 1798 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1799 aggregator->aggregator_identifier = 0; 1800 aggregator->slave = NULL; 1801 } 1802 } 1803 1804 /** 1805 * ad_initialize_port - initialize a given port's parameters 1806 * @aggregator: the aggregator we're looking at 1807 * @lacp_fast: boolean. whether fast periodic should be used 1808 */ 1809 static void ad_initialize_port(struct port *port, int lacp_fast) 1810 { 1811 static const struct port_params tmpl = { 1812 .system_priority = 0xffff, 1813 .key = 1, 1814 .port_number = 1, 1815 .port_priority = 0xff, 1816 .port_state = 1, 1817 }; 1818 static const struct lacpdu lacpdu = { 1819 .subtype = 0x01, 1820 .version_number = 0x01, 1821 .tlv_type_actor_info = 0x01, 1822 .actor_information_length = 0x14, 1823 .tlv_type_partner_info = 0x02, 1824 .partner_information_length = 0x14, 1825 .tlv_type_collector_info = 0x03, 1826 .collector_information_length = 0x10, 1827 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1828 }; 1829 1830 if (port) { 1831 port->actor_port_priority = 0xff; 1832 port->actor_port_aggregator_identifier = 0; 1833 port->ntt = false; 1834 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1835 AD_STATE_LACP_ACTIVITY; 1836 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1837 AD_STATE_LACP_ACTIVITY; 1838 1839 if (lacp_fast) 1840 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1841 1842 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1843 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1844 1845 port->is_enabled = true; 1846 /* private parameters */ 1847 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1848 port->sm_rx_state = 0; 1849 port->sm_rx_timer_counter = 0; 1850 port->sm_periodic_state = 0; 1851 port->sm_periodic_timer_counter = 0; 1852 port->sm_mux_state = 0; 1853 port->sm_mux_timer_counter = 0; 1854 port->sm_tx_state = 0; 1855 port->aggregator = NULL; 1856 port->next_port_in_aggregator = NULL; 1857 port->transaction_id = 0; 1858 1859 port->sm_churn_actor_timer_counter = 0; 1860 port->sm_churn_actor_state = 0; 1861 port->churn_actor_count = 0; 1862 port->sm_churn_partner_timer_counter = 0; 1863 port->sm_churn_partner_state = 0; 1864 port->churn_partner_count = 0; 1865 1866 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1867 } 1868 } 1869 1870 /** 1871 * ad_enable_collecting_distributing - enable a port's transmit/receive 1872 * @port: the port we're looking at 1873 * @update_slave_arr: Does slave array need update? 1874 * 1875 * Enable @port if it's in an active aggregator 1876 */ 1877 static void ad_enable_collecting_distributing(struct port *port, 1878 bool *update_slave_arr) 1879 { 1880 if (port->aggregator->is_active) { 1881 pr_debug("Enabling port %d(LAG %d)\n", 1882 port->actor_port_number, 1883 port->aggregator->aggregator_identifier); 1884 __enable_port(port); 1885 /* Slave array needs update */ 1886 *update_slave_arr = true; 1887 } 1888 } 1889 1890 /** 1891 * ad_disable_collecting_distributing - disable a port's transmit/receive 1892 * @port: the port we're looking at 1893 * @update_slave_arr: Does slave array need update? 1894 */ 1895 static void ad_disable_collecting_distributing(struct port *port, 1896 bool *update_slave_arr) 1897 { 1898 if (port->aggregator && 1899 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1900 &(null_mac_addr))) { 1901 pr_debug("Disabling port %d(LAG %d)\n", 1902 port->actor_port_number, 1903 port->aggregator->aggregator_identifier); 1904 __disable_port(port); 1905 /* Slave array needs an update */ 1906 *update_slave_arr = true; 1907 } 1908 } 1909 1910 /** 1911 * ad_marker_info_received - handle receive of a Marker information frame 1912 * @marker_info: Marker info received 1913 * @port: the port we're looking at 1914 */ 1915 static void ad_marker_info_received(struct bond_marker *marker_info, 1916 struct port *port) 1917 { 1918 struct bond_marker marker; 1919 1920 /* copy the received marker data to the response marker */ 1921 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1922 /* change the marker subtype to marker response */ 1923 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1924 1925 /* send the marker response */ 1926 if (ad_marker_send(port, &marker) >= 0) { 1927 pr_debug("Sent Marker Response on port %d\n", 1928 port->actor_port_number); 1929 } 1930 } 1931 1932 /** 1933 * ad_marker_response_received - handle receive of a marker response frame 1934 * @marker: marker PDU received 1935 * @port: the port we're looking at 1936 * 1937 * This function does nothing since we decided not to implement send and handle 1938 * response for marker PDU's, in this stage, but only to respond to marker 1939 * information. 1940 */ 1941 static void ad_marker_response_received(struct bond_marker *marker, 1942 struct port *port) 1943 { 1944 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1945 } 1946 1947 /* ========= AD exported functions to the main bonding code ========= */ 1948 1949 /* Check aggregators status in team every T seconds */ 1950 #define AD_AGGREGATOR_SELECTION_TIMER 8 1951 1952 /** 1953 * bond_3ad_initiate_agg_selection - initate aggregator selection 1954 * @bond: bonding struct 1955 * 1956 * Set the aggregation selection timer, to initiate an agg selection in 1957 * the very near future. Called during first initialization, and during 1958 * any down to up transitions of the bond. 1959 */ 1960 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1961 { 1962 BOND_AD_INFO(bond).agg_select_timer = timeout; 1963 } 1964 1965 /** 1966 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1967 * @bond: bonding struct to work on 1968 * @tick_resolution: tick duration (millisecond resolution) 1969 * 1970 * Can be called only after the mac address of the bond is set. 1971 */ 1972 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1973 { 1974 /* check that the bond is not initialized yet */ 1975 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1976 bond->dev->dev_addr)) { 1977 1978 BOND_AD_INFO(bond).aggregator_identifier = 0; 1979 1980 BOND_AD_INFO(bond).system.sys_priority = 1981 bond->params.ad_actor_sys_prio; 1982 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1983 BOND_AD_INFO(bond).system.sys_mac_addr = 1984 *((struct mac_addr *)bond->dev->dev_addr); 1985 else 1986 BOND_AD_INFO(bond).system.sys_mac_addr = 1987 *((struct mac_addr *)bond->params.ad_actor_system); 1988 1989 /* initialize how many times this module is called in one 1990 * second (should be about every 100ms) 1991 */ 1992 ad_ticks_per_sec = tick_resolution; 1993 1994 bond_3ad_initiate_agg_selection(bond, 1995 AD_AGGREGATOR_SELECTION_TIMER * 1996 ad_ticks_per_sec); 1997 } 1998 } 1999 2000 /** 2001 * bond_3ad_bind_slave - initialize a slave's port 2002 * @slave: slave struct to work on 2003 * 2004 * Returns: 0 on success 2005 * < 0 on error 2006 */ 2007 void bond_3ad_bind_slave(struct slave *slave) 2008 { 2009 struct bonding *bond = bond_get_bond_by_slave(slave); 2010 struct port *port; 2011 struct aggregator *aggregator; 2012 2013 /* check that the slave has not been initialized yet. */ 2014 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2015 2016 /* port initialization */ 2017 port = &(SLAVE_AD_INFO(slave)->port); 2018 2019 ad_initialize_port(port, bond->params.lacp_fast); 2020 2021 port->slave = slave; 2022 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2023 /* key is determined according to the link speed, duplex and 2024 * user key 2025 */ 2026 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2027 ad_update_actor_keys(port, false); 2028 /* actor system is the bond's system */ 2029 __ad_actor_update_port(port); 2030 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2031 * lacpdu's are sent in one second) 2032 */ 2033 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2034 2035 __disable_port(port); 2036 2037 /* aggregator initialization */ 2038 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2039 2040 ad_initialize_agg(aggregator); 2041 2042 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2043 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2044 aggregator->slave = slave; 2045 aggregator->is_active = 0; 2046 aggregator->num_of_ports = 0; 2047 } 2048 } 2049 2050 /** 2051 * bond_3ad_unbind_slave - deinitialize a slave's port 2052 * @slave: slave struct to work on 2053 * 2054 * Search for the aggregator that is related to this port, remove the 2055 * aggregator and assign another aggregator for other port related to it 2056 * (if any), and remove the port. 2057 */ 2058 void bond_3ad_unbind_slave(struct slave *slave) 2059 { 2060 struct port *port, *prev_port, *temp_port; 2061 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2062 int select_new_active_agg = 0; 2063 struct bonding *bond = slave->bond; 2064 struct slave *slave_iter; 2065 struct list_head *iter; 2066 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2067 2068 /* Sync against bond_3ad_state_machine_handler() */ 2069 spin_lock_bh(&bond->mode_lock); 2070 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2071 port = &(SLAVE_AD_INFO(slave)->port); 2072 2073 /* if slave is null, the whole port is not initialized */ 2074 if (!port->slave) { 2075 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2076 slave->dev->name); 2077 goto out; 2078 } 2079 2080 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2081 aggregator->aggregator_identifier); 2082 2083 /* Tell the partner that this port is not suitable for aggregation */ 2084 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2085 __update_lacpdu_from_port(port); 2086 ad_lacpdu_send(port); 2087 2088 /* check if this aggregator is occupied */ 2089 if (aggregator->lag_ports) { 2090 /* check if there are other ports related to this aggregator 2091 * except the port related to this slave(thats ensure us that 2092 * there is a reason to search for new aggregator, and that we 2093 * will find one 2094 */ 2095 if ((aggregator->lag_ports != port) || 2096 (aggregator->lag_ports->next_port_in_aggregator)) { 2097 /* find new aggregator for the related port(s) */ 2098 bond_for_each_slave(bond, slave_iter, iter) { 2099 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2100 /* if the new aggregator is empty, or it is 2101 * connected to our port only 2102 */ 2103 if (!new_aggregator->lag_ports || 2104 ((new_aggregator->lag_ports == port) && 2105 !new_aggregator->lag_ports->next_port_in_aggregator)) 2106 break; 2107 } 2108 if (!slave_iter) 2109 new_aggregator = NULL; 2110 2111 /* if new aggregator found, copy the aggregator's 2112 * parameters and connect the related lag_ports to the 2113 * new aggregator 2114 */ 2115 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2116 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2117 aggregator->aggregator_identifier, 2118 new_aggregator->aggregator_identifier); 2119 2120 if ((new_aggregator->lag_ports == port) && 2121 new_aggregator->is_active) { 2122 netdev_info(bond->dev, "Removing an active aggregator\n"); 2123 select_new_active_agg = 1; 2124 } 2125 2126 new_aggregator->is_individual = aggregator->is_individual; 2127 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2128 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2129 new_aggregator->partner_system = aggregator->partner_system; 2130 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2131 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2132 new_aggregator->receive_state = aggregator->receive_state; 2133 new_aggregator->transmit_state = aggregator->transmit_state; 2134 new_aggregator->lag_ports = aggregator->lag_ports; 2135 new_aggregator->is_active = aggregator->is_active; 2136 new_aggregator->num_of_ports = aggregator->num_of_ports; 2137 2138 /* update the information that is written on 2139 * the ports about the aggregator 2140 */ 2141 for (temp_port = aggregator->lag_ports; temp_port; 2142 temp_port = temp_port->next_port_in_aggregator) { 2143 temp_port->aggregator = new_aggregator; 2144 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2145 } 2146 2147 ad_clear_agg(aggregator); 2148 2149 if (select_new_active_agg) 2150 ad_agg_selection_logic(__get_first_agg(port), 2151 &dummy_slave_update); 2152 } else { 2153 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2154 } 2155 } else { 2156 /* in case that the only port related to this 2157 * aggregator is the one we want to remove 2158 */ 2159 select_new_active_agg = aggregator->is_active; 2160 ad_clear_agg(aggregator); 2161 if (select_new_active_agg) { 2162 netdev_info(bond->dev, "Removing an active aggregator\n"); 2163 /* select new active aggregator */ 2164 temp_aggregator = __get_first_agg(port); 2165 if (temp_aggregator) 2166 ad_agg_selection_logic(temp_aggregator, 2167 &dummy_slave_update); 2168 } 2169 } 2170 } 2171 2172 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2173 2174 /* find the aggregator that this port is connected to */ 2175 bond_for_each_slave(bond, slave_iter, iter) { 2176 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2177 prev_port = NULL; 2178 /* search the port in the aggregator's related ports */ 2179 for (temp_port = temp_aggregator->lag_ports; temp_port; 2180 prev_port = temp_port, 2181 temp_port = temp_port->next_port_in_aggregator) { 2182 if (temp_port == port) { 2183 /* the aggregator found - detach the port from 2184 * this aggregator 2185 */ 2186 if (prev_port) 2187 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2188 else 2189 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2190 temp_aggregator->num_of_ports--; 2191 if (__agg_active_ports(temp_aggregator) == 0) { 2192 select_new_active_agg = temp_aggregator->is_active; 2193 ad_clear_agg(temp_aggregator); 2194 if (select_new_active_agg) { 2195 netdev_info(bond->dev, "Removing an active aggregator\n"); 2196 /* select new active aggregator */ 2197 ad_agg_selection_logic(__get_first_agg(port), 2198 &dummy_slave_update); 2199 } 2200 } 2201 break; 2202 } 2203 } 2204 } 2205 port->slave = NULL; 2206 2207 out: 2208 spin_unlock_bh(&bond->mode_lock); 2209 } 2210 2211 /** 2212 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2213 * @bond: bonding struct to work on 2214 * 2215 * If an ad_actor setting gets changed we need to update the individual port 2216 * settings so the bond device will use the new values when it gets upped. 2217 */ 2218 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2219 { 2220 struct list_head *iter; 2221 struct slave *slave; 2222 2223 ASSERT_RTNL(); 2224 2225 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2226 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2227 BOND_AD_INFO(bond).system.sys_mac_addr = 2228 *((struct mac_addr *)bond->dev->dev_addr); 2229 else 2230 BOND_AD_INFO(bond).system.sys_mac_addr = 2231 *((struct mac_addr *)bond->params.ad_actor_system); 2232 2233 spin_lock_bh(&bond->mode_lock); 2234 bond_for_each_slave(bond, slave, iter) { 2235 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2236 2237 __ad_actor_update_port(port); 2238 port->ntt = true; 2239 } 2240 spin_unlock_bh(&bond->mode_lock); 2241 } 2242 2243 /** 2244 * bond_3ad_state_machine_handler - handle state machines timeout 2245 * @bond: bonding struct to work on 2246 * 2247 * The state machine handling concept in this module is to check every tick 2248 * which state machine should operate any function. The execution order is 2249 * round robin, so when we have an interaction between state machines, the 2250 * reply of one to each other might be delayed until next tick. 2251 * 2252 * This function also complete the initialization when the agg_select_timer 2253 * times out, and it selects an aggregator for the ports that are yet not 2254 * related to any aggregator, and selects the active aggregator for a bond. 2255 */ 2256 void bond_3ad_state_machine_handler(struct work_struct *work) 2257 { 2258 struct bonding *bond = container_of(work, struct bonding, 2259 ad_work.work); 2260 struct aggregator *aggregator; 2261 struct list_head *iter; 2262 struct slave *slave; 2263 struct port *port; 2264 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2265 bool update_slave_arr = false; 2266 2267 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2268 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2269 * concurrently due to incoming LACPDU as well. 2270 */ 2271 spin_lock_bh(&bond->mode_lock); 2272 rcu_read_lock(); 2273 2274 /* check if there are any slaves */ 2275 if (!bond_has_slaves(bond)) 2276 goto re_arm; 2277 2278 /* check if agg_select_timer timer after initialize is timed out */ 2279 if (BOND_AD_INFO(bond).agg_select_timer && 2280 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2281 slave = bond_first_slave_rcu(bond); 2282 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2283 2284 /* select the active aggregator for the bond */ 2285 if (port) { 2286 if (!port->slave) { 2287 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2288 bond->dev->name); 2289 goto re_arm; 2290 } 2291 2292 aggregator = __get_first_agg(port); 2293 ad_agg_selection_logic(aggregator, &update_slave_arr); 2294 } 2295 bond_3ad_set_carrier(bond); 2296 } 2297 2298 /* for each port run the state machines */ 2299 bond_for_each_slave_rcu(bond, slave, iter) { 2300 port = &(SLAVE_AD_INFO(slave)->port); 2301 if (!port->slave) { 2302 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2303 bond->dev->name); 2304 goto re_arm; 2305 } 2306 2307 ad_rx_machine(NULL, port); 2308 ad_periodic_machine(port); 2309 ad_port_selection_logic(port, &update_slave_arr); 2310 ad_mux_machine(port, &update_slave_arr); 2311 ad_tx_machine(port); 2312 ad_churn_machine(port); 2313 2314 /* turn off the BEGIN bit, since we already handled it */ 2315 if (port->sm_vars & AD_PORT_BEGIN) 2316 port->sm_vars &= ~AD_PORT_BEGIN; 2317 } 2318 2319 re_arm: 2320 bond_for_each_slave_rcu(bond, slave, iter) { 2321 if (slave->should_notify) { 2322 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2323 break; 2324 } 2325 } 2326 rcu_read_unlock(); 2327 spin_unlock_bh(&bond->mode_lock); 2328 2329 if (update_slave_arr) 2330 bond_slave_arr_work_rearm(bond, 0); 2331 2332 if (should_notify_rtnl && rtnl_trylock()) { 2333 bond_slave_state_notify(bond); 2334 rtnl_unlock(); 2335 } 2336 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2337 } 2338 2339 /** 2340 * bond_3ad_rx_indication - handle a received frame 2341 * @lacpdu: received lacpdu 2342 * @slave: slave struct to work on 2343 * @length: length of the data received 2344 * 2345 * It is assumed that frames that were sent on this NIC don't returned as new 2346 * received frames (loopback). Since only the payload is given to this 2347 * function, it check for loopback. 2348 */ 2349 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2350 u16 length) 2351 { 2352 struct port *port; 2353 int ret = RX_HANDLER_ANOTHER; 2354 2355 if (length >= sizeof(struct lacpdu)) { 2356 2357 port = &(SLAVE_AD_INFO(slave)->port); 2358 2359 if (!port->slave) { 2360 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2361 slave->dev->name, slave->bond->dev->name); 2362 return ret; 2363 } 2364 2365 switch (lacpdu->subtype) { 2366 case AD_TYPE_LACPDU: 2367 ret = RX_HANDLER_CONSUMED; 2368 netdev_dbg(slave->bond->dev, 2369 "Received LACPDU on port %d slave %s\n", 2370 port->actor_port_number, 2371 slave->dev->name); 2372 /* Protect against concurrent state machines */ 2373 spin_lock(&slave->bond->mode_lock); 2374 ad_rx_machine(lacpdu, port); 2375 spin_unlock(&slave->bond->mode_lock); 2376 break; 2377 2378 case AD_TYPE_MARKER: 2379 ret = RX_HANDLER_CONSUMED; 2380 /* No need to convert fields to Little Endian since we 2381 * don't use the marker's fields. 2382 */ 2383 2384 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2385 case AD_MARKER_INFORMATION_SUBTYPE: 2386 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2387 port->actor_port_number); 2388 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2389 break; 2390 2391 case AD_MARKER_RESPONSE_SUBTYPE: 2392 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2393 port->actor_port_number); 2394 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2395 break; 2396 2397 default: 2398 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2399 port->actor_port_number); 2400 } 2401 } 2402 } 2403 return ret; 2404 } 2405 2406 /** 2407 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2408 * its current speed and duplex settings. 2409 * 2410 * @port: the port we'are looking at 2411 * @reset: Boolean to just reset the speed and the duplex part of the key 2412 * 2413 * The logic to change the oper / admin keys is: 2414 * (a) A full duplex port can participate in LACP with partner. 2415 * (b) When the speed is changed, LACP need to be reinitiated. 2416 */ 2417 static void ad_update_actor_keys(struct port *port, bool reset) 2418 { 2419 u8 duplex = 0; 2420 u16 ospeed = 0, speed = 0; 2421 u16 old_oper_key = port->actor_oper_port_key; 2422 2423 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2424 if (!reset) { 2425 speed = __get_link_speed(port); 2426 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2427 duplex = __get_duplex(port); 2428 port->actor_admin_port_key |= (speed << 1) | duplex; 2429 } 2430 port->actor_oper_port_key = port->actor_admin_port_key; 2431 2432 if (old_oper_key != port->actor_oper_port_key) { 2433 /* Only 'duplex' port participates in LACP */ 2434 if (duplex) 2435 port->sm_vars |= AD_PORT_LACP_ENABLED; 2436 else 2437 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2438 2439 if (!reset) { 2440 if (!speed) { 2441 netdev_err(port->slave->dev, 2442 "speed changed to 0 for port %s", 2443 port->slave->dev->name); 2444 } else if (duplex && ospeed != speed) { 2445 /* Speed change restarts LACP state-machine */ 2446 port->sm_vars |= AD_PORT_BEGIN; 2447 } 2448 } 2449 } 2450 } 2451 2452 /** 2453 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2454 * change indication 2455 * 2456 * @slave: slave struct to work on 2457 * 2458 * Handle reselection of aggregator (if needed) for this port. 2459 */ 2460 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2461 { 2462 struct port *port; 2463 2464 port = &(SLAVE_AD_INFO(slave)->port); 2465 2466 /* if slave is null, the whole port is not initialized */ 2467 if (!port->slave) { 2468 netdev_warn(slave->bond->dev, 2469 "speed/duplex changed for uninitialized port %s\n", 2470 slave->dev->name); 2471 return; 2472 } 2473 2474 spin_lock_bh(&slave->bond->mode_lock); 2475 ad_update_actor_keys(port, false); 2476 spin_unlock_bh(&slave->bond->mode_lock); 2477 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", 2478 port->actor_port_number, slave->dev->name); 2479 } 2480 2481 /** 2482 * bond_3ad_handle_link_change - handle a slave's link status change indication 2483 * @slave: slave struct to work on 2484 * @status: whether the link is now up or down 2485 * 2486 * Handle reselection of aggregator (if needed) for this port. 2487 */ 2488 void bond_3ad_handle_link_change(struct slave *slave, char link) 2489 { 2490 struct aggregator *agg; 2491 struct port *port; 2492 bool dummy; 2493 2494 port = &(SLAVE_AD_INFO(slave)->port); 2495 2496 /* if slave is null, the whole port is not initialized */ 2497 if (!port->slave) { 2498 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2499 slave->dev->name); 2500 return; 2501 } 2502 2503 spin_lock_bh(&slave->bond->mode_lock); 2504 /* on link down we are zeroing duplex and speed since 2505 * some of the adaptors(ce1000.lan) report full duplex/speed 2506 * instead of N/A(duplex) / 0(speed). 2507 * 2508 * on link up we are forcing recheck on the duplex and speed since 2509 * some of he adaptors(ce1000.lan) report. 2510 */ 2511 if (link == BOND_LINK_UP) { 2512 port->is_enabled = true; 2513 ad_update_actor_keys(port, false); 2514 } else { 2515 /* link has failed */ 2516 port->is_enabled = false; 2517 ad_update_actor_keys(port, true); 2518 } 2519 agg = __get_first_agg(port); 2520 ad_agg_selection_logic(agg, &dummy); 2521 2522 spin_unlock_bh(&slave->bond->mode_lock); 2523 2524 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2525 port->actor_port_number, 2526 link == BOND_LINK_UP ? "UP" : "DOWN"); 2527 2528 /* RTNL is held and mode_lock is released so it's safe 2529 * to update slave_array here. 2530 */ 2531 bond_update_slave_arr(slave->bond, NULL); 2532 } 2533 2534 /** 2535 * bond_3ad_set_carrier - set link state for bonding master 2536 * @bond - bonding structure 2537 * 2538 * if we have an active aggregator, we're up, if not, we're down. 2539 * Presumes that we cannot have an active aggregator if there are 2540 * no slaves with link up. 2541 * 2542 * This behavior complies with IEEE 802.3 section 43.3.9. 2543 * 2544 * Called by bond_set_carrier(). Return zero if carrier state does not 2545 * change, nonzero if it does. 2546 */ 2547 int bond_3ad_set_carrier(struct bonding *bond) 2548 { 2549 struct aggregator *active; 2550 struct slave *first_slave; 2551 int ret = 1; 2552 2553 rcu_read_lock(); 2554 first_slave = bond_first_slave_rcu(bond); 2555 if (!first_slave) { 2556 ret = 0; 2557 goto out; 2558 } 2559 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2560 if (active) { 2561 /* are enough slaves available to consider link up? */ 2562 if (__agg_active_ports(active) < bond->params.min_links) { 2563 if (netif_carrier_ok(bond->dev)) { 2564 netif_carrier_off(bond->dev); 2565 goto out; 2566 } 2567 } else if (!netif_carrier_ok(bond->dev)) { 2568 netif_carrier_on(bond->dev); 2569 goto out; 2570 } 2571 } else if (netif_carrier_ok(bond->dev)) { 2572 netif_carrier_off(bond->dev); 2573 } 2574 out: 2575 rcu_read_unlock(); 2576 return ret; 2577 } 2578 2579 /** 2580 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2581 * @bond: bonding struct to work on 2582 * @ad_info: ad_info struct to fill with the bond's info 2583 * 2584 * Returns: 0 on success 2585 * < 0 on error 2586 */ 2587 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2588 struct ad_info *ad_info) 2589 { 2590 struct aggregator *aggregator = NULL; 2591 struct list_head *iter; 2592 struct slave *slave; 2593 struct port *port; 2594 2595 bond_for_each_slave_rcu(bond, slave, iter) { 2596 port = &(SLAVE_AD_INFO(slave)->port); 2597 if (port->aggregator && port->aggregator->is_active) { 2598 aggregator = port->aggregator; 2599 break; 2600 } 2601 } 2602 2603 if (!aggregator) 2604 return -1; 2605 2606 ad_info->aggregator_id = aggregator->aggregator_identifier; 2607 ad_info->ports = __agg_active_ports(aggregator); 2608 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2609 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2610 ether_addr_copy(ad_info->partner_system, 2611 aggregator->partner_system.mac_addr_value); 2612 return 0; 2613 } 2614 2615 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2616 { 2617 int ret; 2618 2619 rcu_read_lock(); 2620 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2621 rcu_read_unlock(); 2622 2623 return ret; 2624 } 2625 2626 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2627 struct slave *slave) 2628 { 2629 struct lacpdu *lacpdu, _lacpdu; 2630 2631 if (skb->protocol != PKT_TYPE_LACPDU) 2632 return RX_HANDLER_ANOTHER; 2633 2634 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2635 return RX_HANDLER_ANOTHER; 2636 2637 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2638 if (!lacpdu) 2639 return RX_HANDLER_ANOTHER; 2640 2641 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2642 } 2643 2644 /** 2645 * bond_3ad_update_lacp_rate - change the lacp rate 2646 * @bond - bonding struct 2647 * 2648 * When modify lacp_rate parameter via sysfs, 2649 * update actor_oper_port_state of each port. 2650 * 2651 * Hold bond->mode_lock, 2652 * so we can modify port->actor_oper_port_state, 2653 * no matter bond is up or down. 2654 */ 2655 void bond_3ad_update_lacp_rate(struct bonding *bond) 2656 { 2657 struct port *port = NULL; 2658 struct list_head *iter; 2659 struct slave *slave; 2660 int lacp_fast; 2661 2662 lacp_fast = bond->params.lacp_fast; 2663 spin_lock_bh(&bond->mode_lock); 2664 bond_for_each_slave(bond, slave, iter) { 2665 port = &(SLAVE_AD_INFO(slave)->port); 2666 if (lacp_fast) 2667 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2668 else 2669 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2670 } 2671 spin_unlock_bh(&bond->mode_lock); 2672 } 2673