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 if (slave->speed != SPEED_UNKNOWN) 344 pr_warn_once("%s: unknown ethtool speed (%d) for port %d (set it to 0)\n", 345 slave->bond->dev->name, 346 slave->speed, 347 port->actor_port_number); 348 speed = 0; 349 break; 350 } 351 } 352 353 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 354 port->actor_port_number, speed); 355 return speed; 356 } 357 358 /** 359 * __get_duplex - get a port's duplex 360 * @port: the port we're looking at 361 * 362 * Return @port's duplex in 802.3ad bitmask format. i.e.: 363 * 0x01 if in full duplex 364 * 0x00 otherwise 365 */ 366 static u8 __get_duplex(struct port *port) 367 { 368 struct slave *slave = port->slave; 369 u8 retval = 0x0; 370 371 /* handling a special case: when the configuration starts with 372 * link down, it sets the duplex to 0. 373 */ 374 if (slave->link == BOND_LINK_UP) { 375 switch (slave->duplex) { 376 case DUPLEX_FULL: 377 retval = 0x1; 378 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 379 port->actor_port_number); 380 break; 381 case DUPLEX_HALF: 382 default: 383 retval = 0x0; 384 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 385 port->actor_port_number); 386 break; 387 } 388 } 389 return retval; 390 } 391 392 static void __ad_actor_update_port(struct port *port) 393 { 394 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 395 396 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 397 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 398 } 399 400 /* Conversions */ 401 402 /** 403 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 404 * @timer_type: which timer to operate 405 * @par: timer parameter. see below 406 * 407 * If @timer_type is %current_while_timer, @par indicates long/short timer. 408 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 409 * %SLOW_PERIODIC_TIME. 410 */ 411 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 412 { 413 u16 retval = 0; /* to silence the compiler */ 414 415 switch (timer_type) { 416 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 417 if (par) 418 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 419 else 420 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 421 break; 422 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 423 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 424 break; 425 case AD_PERIODIC_TIMER: /* for periodic machine */ 426 retval = (par*ad_ticks_per_sec); /* long timeout */ 427 break; 428 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 429 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 430 break; 431 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 432 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 433 break; 434 } 435 436 return retval; 437 } 438 439 440 /* ================= ad_rx_machine helper functions ================== */ 441 442 /** 443 * __choose_matched - update a port's matched variable from a received lacpdu 444 * @lacpdu: the lacpdu we've received 445 * @port: the port we're looking at 446 * 447 * Update the value of the matched variable, using parameter values from a 448 * newly received lacpdu. Parameter values for the partner carried in the 449 * received PDU are compared with the corresponding operational parameter 450 * values for the actor. Matched is set to TRUE if all of these parameters 451 * match and the PDU parameter partner_state.aggregation has the same value as 452 * actor_oper_port_state.aggregation and lacp will actively maintain the link 453 * in the aggregation. Matched is also set to TRUE if the value of 454 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 455 * an individual link and lacp will actively maintain the link. Otherwise, 456 * matched is set to FALSE. LACP is considered to be actively maintaining the 457 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 458 * the actor's actor_oper_port_state.lacp_activity and the PDU's 459 * partner_state.lacp_activity variables are TRUE. 460 * 461 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 462 * used here to implement the language from 802.3ad 43.4.9 that requires 463 * recordPDU to "match" the LACPDU parameters to the stored values. 464 */ 465 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 466 { 467 /* check if all parameters are alike 468 * or this is individual link(aggregation == FALSE) 469 * then update the state machine Matched variable. 470 */ 471 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 472 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 473 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 474 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 475 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 476 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 477 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 478 ) { 479 port->sm_vars |= AD_PORT_MATCHED; 480 } else { 481 port->sm_vars &= ~AD_PORT_MATCHED; 482 } 483 } 484 485 /** 486 * __record_pdu - record parameters from a received lacpdu 487 * @lacpdu: the lacpdu we've received 488 * @port: the port we're looking at 489 * 490 * Record the parameter values for the Actor carried in a received lacpdu as 491 * the current partner operational parameter values and sets 492 * actor_oper_port_state.defaulted to FALSE. 493 */ 494 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 495 { 496 if (lacpdu && port) { 497 struct port_params *partner = &port->partner_oper; 498 499 __choose_matched(lacpdu, port); 500 /* record the new parameter values for the partner 501 * operational 502 */ 503 partner->port_number = ntohs(lacpdu->actor_port); 504 partner->port_priority = ntohs(lacpdu->actor_port_priority); 505 partner->system = lacpdu->actor_system; 506 partner->system_priority = ntohs(lacpdu->actor_system_priority); 507 partner->key = ntohs(lacpdu->actor_key); 508 partner->port_state = lacpdu->actor_state; 509 510 /* set actor_oper_port_state.defaulted to FALSE */ 511 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 512 513 /* set the partner sync. to on if the partner is sync, 514 * and the port is matched 515 */ 516 if ((port->sm_vars & AD_PORT_MATCHED) && 517 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 518 partner->port_state |= AD_STATE_SYNCHRONIZATION; 519 pr_debug("%s partner sync=1\n", port->slave->dev->name); 520 } else { 521 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 522 pr_debug("%s partner sync=0\n", port->slave->dev->name); 523 } 524 } 525 } 526 527 /** 528 * __record_default - record default parameters 529 * @port: the port we're looking at 530 * 531 * This function records the default parameter values for the partner carried 532 * in the Partner Admin parameters as the current partner operational parameter 533 * values and sets actor_oper_port_state.defaulted to TRUE. 534 */ 535 static void __record_default(struct port *port) 536 { 537 if (port) { 538 /* record the partner admin parameters */ 539 memcpy(&port->partner_oper, &port->partner_admin, 540 sizeof(struct port_params)); 541 542 /* set actor_oper_port_state.defaulted to true */ 543 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 544 } 545 } 546 547 /** 548 * __update_selected - update a port's Selected variable from a received lacpdu 549 * @lacpdu: the lacpdu we've received 550 * @port: the port we're looking at 551 * 552 * Update the value of the selected variable, using parameter values from a 553 * newly received lacpdu. The parameter values for the Actor carried in the 554 * received PDU are compared with the corresponding operational parameter 555 * values for the ports partner. If one or more of the comparisons shows that 556 * the value(s) received in the PDU differ from the current operational values, 557 * then selected is set to FALSE and actor_oper_port_state.synchronization is 558 * set to out_of_sync. Otherwise, selected remains unchanged. 559 */ 560 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 561 { 562 if (lacpdu && port) { 563 const struct port_params *partner = &port->partner_oper; 564 565 /* check if any parameter is different then 566 * update the state machine selected variable. 567 */ 568 if (ntohs(lacpdu->actor_port) != partner->port_number || 569 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 570 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 571 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 572 ntohs(lacpdu->actor_key) != partner->key || 573 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 574 port->sm_vars &= ~AD_PORT_SELECTED; 575 } 576 } 577 } 578 579 /** 580 * __update_default_selected - update a port's Selected variable from Partner 581 * @port: the port we're looking at 582 * 583 * This function updates the value of the selected variable, using the partner 584 * administrative parameter values. The administrative values are compared with 585 * the corresponding operational parameter values for the partner. If one or 586 * more of the comparisons shows that the administrative value(s) differ from 587 * the current operational values, then Selected is set to FALSE and 588 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 589 * Selected remains unchanged. 590 */ 591 static void __update_default_selected(struct port *port) 592 { 593 if (port) { 594 const struct port_params *admin = &port->partner_admin; 595 const struct port_params *oper = &port->partner_oper; 596 597 /* check if any parameter is different then 598 * update the state machine selected variable. 599 */ 600 if (admin->port_number != oper->port_number || 601 admin->port_priority != oper->port_priority || 602 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 603 admin->system_priority != oper->system_priority || 604 admin->key != oper->key || 605 (admin->port_state & AD_STATE_AGGREGATION) 606 != (oper->port_state & AD_STATE_AGGREGATION)) { 607 port->sm_vars &= ~AD_PORT_SELECTED; 608 } 609 } 610 } 611 612 /** 613 * __update_ntt - update a port's ntt variable from a received lacpdu 614 * @lacpdu: the lacpdu we've received 615 * @port: the port we're looking at 616 * 617 * Updates the value of the ntt variable, using parameter values from a newly 618 * received lacpdu. The parameter values for the partner carried in the 619 * received PDU are compared with the corresponding operational parameter 620 * values for the Actor. If one or more of the comparisons shows that the 621 * value(s) received in the PDU differ from the current operational values, 622 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 623 */ 624 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 625 { 626 /* validate lacpdu and port */ 627 if (lacpdu && port) { 628 /* check if any parameter is different then 629 * update the port->ntt. 630 */ 631 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 632 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 633 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 634 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 635 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 636 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 637 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 638 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 639 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 640 ) { 641 port->ntt = true; 642 } 643 } 644 } 645 646 /** 647 * __agg_ports_are_ready - check if all ports in an aggregator are ready 648 * @aggregator: the aggregator we're looking at 649 * 650 */ 651 static int __agg_ports_are_ready(struct aggregator *aggregator) 652 { 653 struct port *port; 654 int retval = 1; 655 656 if (aggregator) { 657 /* scan all ports in this aggregator to verfy if they are 658 * all ready. 659 */ 660 for (port = aggregator->lag_ports; 661 port; 662 port = port->next_port_in_aggregator) { 663 if (!(port->sm_vars & AD_PORT_READY_N)) { 664 retval = 0; 665 break; 666 } 667 } 668 } 669 670 return retval; 671 } 672 673 /** 674 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 675 * @aggregator: the aggregator we're looking at 676 * @val: Should the ports' ready bit be set on or off 677 * 678 */ 679 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 680 { 681 struct port *port; 682 683 for (port = aggregator->lag_ports; port; 684 port = port->next_port_in_aggregator) { 685 if (val) 686 port->sm_vars |= AD_PORT_READY; 687 else 688 port->sm_vars &= ~AD_PORT_READY; 689 } 690 } 691 692 static int __agg_active_ports(struct aggregator *agg) 693 { 694 struct port *port; 695 int active = 0; 696 697 for (port = agg->lag_ports; port; 698 port = port->next_port_in_aggregator) { 699 if (port->is_enabled) 700 active++; 701 } 702 703 return active; 704 } 705 706 /** 707 * __get_agg_bandwidth - get the total bandwidth of an aggregator 708 * @aggregator: the aggregator we're looking at 709 * 710 */ 711 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 712 { 713 int nports = __agg_active_ports(aggregator); 714 u32 bandwidth = 0; 715 716 if (nports) { 717 switch (__get_link_speed(aggregator->lag_ports)) { 718 case AD_LINK_SPEED_1MBPS: 719 bandwidth = nports; 720 break; 721 case AD_LINK_SPEED_10MBPS: 722 bandwidth = nports * 10; 723 break; 724 case AD_LINK_SPEED_100MBPS: 725 bandwidth = nports * 100; 726 break; 727 case AD_LINK_SPEED_1000MBPS: 728 bandwidth = nports * 1000; 729 break; 730 case AD_LINK_SPEED_2500MBPS: 731 bandwidth = nports * 2500; 732 break; 733 case AD_LINK_SPEED_5000MBPS: 734 bandwidth = nports * 5000; 735 break; 736 case AD_LINK_SPEED_10000MBPS: 737 bandwidth = nports * 10000; 738 break; 739 case AD_LINK_SPEED_14000MBPS: 740 bandwidth = nports * 14000; 741 break; 742 case AD_LINK_SPEED_20000MBPS: 743 bandwidth = nports * 20000; 744 break; 745 case AD_LINK_SPEED_25000MBPS: 746 bandwidth = nports * 25000; 747 break; 748 case AD_LINK_SPEED_40000MBPS: 749 bandwidth = nports * 40000; 750 break; 751 case AD_LINK_SPEED_50000MBPS: 752 bandwidth = nports * 50000; 753 break; 754 case AD_LINK_SPEED_56000MBPS: 755 bandwidth = nports * 56000; 756 break; 757 case AD_LINK_SPEED_100000MBPS: 758 bandwidth = nports * 100000; 759 break; 760 default: 761 bandwidth = 0; /* to silence the compiler */ 762 } 763 } 764 return bandwidth; 765 } 766 767 /** 768 * __get_active_agg - get the current active aggregator 769 * @aggregator: the aggregator we're looking at 770 * 771 * Caller must hold RCU lock. 772 */ 773 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 774 { 775 struct bonding *bond = aggregator->slave->bond; 776 struct list_head *iter; 777 struct slave *slave; 778 779 bond_for_each_slave_rcu(bond, slave, iter) 780 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 781 return &(SLAVE_AD_INFO(slave)->aggregator); 782 783 return NULL; 784 } 785 786 /** 787 * __update_lacpdu_from_port - update a port's lacpdu fields 788 * @port: the port we're looking at 789 */ 790 static inline void __update_lacpdu_from_port(struct port *port) 791 { 792 struct lacpdu *lacpdu = &port->lacpdu; 793 const struct port_params *partner = &port->partner_oper; 794 795 /* update current actual Actor parameters 796 * lacpdu->subtype initialized 797 * lacpdu->version_number initialized 798 * lacpdu->tlv_type_actor_info initialized 799 * lacpdu->actor_information_length initialized 800 */ 801 802 lacpdu->actor_system_priority = htons(port->actor_system_priority); 803 lacpdu->actor_system = port->actor_system; 804 lacpdu->actor_key = htons(port->actor_oper_port_key); 805 lacpdu->actor_port_priority = htons(port->actor_port_priority); 806 lacpdu->actor_port = htons(port->actor_port_number); 807 lacpdu->actor_state = port->actor_oper_port_state; 808 pr_debug("update lacpdu: %s, actor port state %x\n", 809 port->slave->dev->name, port->actor_oper_port_state); 810 811 /* lacpdu->reserved_3_1 initialized 812 * lacpdu->tlv_type_partner_info initialized 813 * lacpdu->partner_information_length initialized 814 */ 815 816 lacpdu->partner_system_priority = htons(partner->system_priority); 817 lacpdu->partner_system = partner->system; 818 lacpdu->partner_key = htons(partner->key); 819 lacpdu->partner_port_priority = htons(partner->port_priority); 820 lacpdu->partner_port = htons(partner->port_number); 821 lacpdu->partner_state = partner->port_state; 822 823 /* lacpdu->reserved_3_2 initialized 824 * lacpdu->tlv_type_collector_info initialized 825 * lacpdu->collector_information_length initialized 826 * collector_max_delay initialized 827 * reserved_12[12] initialized 828 * tlv_type_terminator initialized 829 * terminator_length initialized 830 * reserved_50[50] initialized 831 */ 832 } 833 834 /* ================= main 802.3ad protocol code ========================= */ 835 836 /** 837 * ad_lacpdu_send - send out a lacpdu packet on a given port 838 * @port: the port we're looking at 839 * 840 * Returns: 0 on success 841 * < 0 on error 842 */ 843 static int ad_lacpdu_send(struct port *port) 844 { 845 struct slave *slave = port->slave; 846 struct sk_buff *skb; 847 struct lacpdu_header *lacpdu_header; 848 int length = sizeof(struct lacpdu_header); 849 850 skb = dev_alloc_skb(length); 851 if (!skb) 852 return -ENOMEM; 853 854 skb->dev = slave->dev; 855 skb_reset_mac_header(skb); 856 skb->network_header = skb->mac_header + ETH_HLEN; 857 skb->protocol = PKT_TYPE_LACPDU; 858 skb->priority = TC_PRIO_CONTROL; 859 860 lacpdu_header = skb_put(skb, length); 861 862 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 863 /* Note: source address is set to be the member's PERMANENT address, 864 * because we use it to identify loopback lacpdus in receive. 865 */ 866 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 867 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 868 869 lacpdu_header->lacpdu = port->lacpdu; 870 871 dev_queue_xmit(skb); 872 873 return 0; 874 } 875 876 /** 877 * ad_marker_send - send marker information/response on a given port 878 * @port: the port we're looking at 879 * @marker: marker data to send 880 * 881 * Returns: 0 on success 882 * < 0 on error 883 */ 884 static int ad_marker_send(struct port *port, struct bond_marker *marker) 885 { 886 struct slave *slave = port->slave; 887 struct sk_buff *skb; 888 struct bond_marker_header *marker_header; 889 int length = sizeof(struct bond_marker_header); 890 891 skb = dev_alloc_skb(length + 16); 892 if (!skb) 893 return -ENOMEM; 894 895 skb_reserve(skb, 16); 896 897 skb->dev = slave->dev; 898 skb_reset_mac_header(skb); 899 skb->network_header = skb->mac_header + ETH_HLEN; 900 skb->protocol = PKT_TYPE_LACPDU; 901 902 marker_header = skb_put(skb, length); 903 904 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 905 /* Note: source address is set to be the member's PERMANENT address, 906 * because we use it to identify loopback MARKERs in receive. 907 */ 908 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 909 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 910 911 marker_header->marker = *marker; 912 913 dev_queue_xmit(skb); 914 915 return 0; 916 } 917 918 /** 919 * ad_mux_machine - handle a port's mux state machine 920 * @port: the port we're looking at 921 * @update_slave_arr: Does slave array need update? 922 */ 923 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 924 { 925 mux_states_t last_state; 926 927 /* keep current State Machine state to compare later if it was 928 * changed 929 */ 930 last_state = port->sm_mux_state; 931 932 if (port->sm_vars & AD_PORT_BEGIN) { 933 port->sm_mux_state = AD_MUX_DETACHED; 934 } else { 935 switch (port->sm_mux_state) { 936 case AD_MUX_DETACHED: 937 if ((port->sm_vars & AD_PORT_SELECTED) 938 || (port->sm_vars & AD_PORT_STANDBY)) 939 /* if SELECTED or STANDBY */ 940 port->sm_mux_state = AD_MUX_WAITING; 941 break; 942 case AD_MUX_WAITING: 943 /* if SELECTED == FALSE return to DETACH state */ 944 if (!(port->sm_vars & AD_PORT_SELECTED)) { 945 port->sm_vars &= ~AD_PORT_READY_N; 946 /* in order to withhold the Selection Logic to 947 * check all ports READY_N value every callback 948 * cycle to update ready variable, we check 949 * READY_N and update READY here 950 */ 951 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 952 port->sm_mux_state = AD_MUX_DETACHED; 953 break; 954 } 955 956 /* check if the wait_while_timer expired */ 957 if (port->sm_mux_timer_counter 958 && !(--port->sm_mux_timer_counter)) 959 port->sm_vars |= AD_PORT_READY_N; 960 961 /* in order to withhold the selection logic to check 962 * all ports READY_N value every callback cycle to 963 * update ready variable, we check READY_N and update 964 * READY here 965 */ 966 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 967 968 /* if the wait_while_timer expired, and the port is 969 * in READY state, move to ATTACHED state 970 */ 971 if ((port->sm_vars & AD_PORT_READY) 972 && !port->sm_mux_timer_counter) 973 port->sm_mux_state = AD_MUX_ATTACHED; 974 break; 975 case AD_MUX_ATTACHED: 976 /* check also if agg_select_timer expired (so the 977 * edable port will take place only after this timer) 978 */ 979 if ((port->sm_vars & AD_PORT_SELECTED) && 980 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 981 !__check_agg_selection_timer(port)) { 982 if (port->aggregator->is_active) 983 port->sm_mux_state = 984 AD_MUX_COLLECTING_DISTRIBUTING; 985 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 986 (port->sm_vars & AD_PORT_STANDBY)) { 987 /* if UNSELECTED or STANDBY */ 988 port->sm_vars &= ~AD_PORT_READY_N; 989 /* in order to withhold the selection logic to 990 * check all ports READY_N value every callback 991 * cycle to update ready variable, we check 992 * READY_N and update READY here 993 */ 994 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 995 port->sm_mux_state = AD_MUX_DETACHED; 996 } else if (port->aggregator->is_active) { 997 port->actor_oper_port_state |= 998 AD_STATE_SYNCHRONIZATION; 999 } 1000 break; 1001 case AD_MUX_COLLECTING_DISTRIBUTING: 1002 if (!(port->sm_vars & AD_PORT_SELECTED) || 1003 (port->sm_vars & AD_PORT_STANDBY) || 1004 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 1005 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 1006 port->sm_mux_state = AD_MUX_ATTACHED; 1007 } else { 1008 /* if port state hasn't changed make 1009 * sure that a collecting distributing 1010 * port in an active aggregator is enabled 1011 */ 1012 if (port->aggregator && 1013 port->aggregator->is_active && 1014 !__port_is_enabled(port)) { 1015 1016 __enable_port(port); 1017 } 1018 } 1019 break; 1020 default: 1021 break; 1022 } 1023 } 1024 1025 /* check if the state machine was changed */ 1026 if (port->sm_mux_state != last_state) { 1027 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1028 port->actor_port_number, 1029 port->slave->dev->name, 1030 last_state, 1031 port->sm_mux_state); 1032 switch (port->sm_mux_state) { 1033 case AD_MUX_DETACHED: 1034 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1035 ad_disable_collecting_distributing(port, 1036 update_slave_arr); 1037 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1038 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1039 port->ntt = true; 1040 break; 1041 case AD_MUX_WAITING: 1042 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1043 break; 1044 case AD_MUX_ATTACHED: 1045 if (port->aggregator->is_active) 1046 port->actor_oper_port_state |= 1047 AD_STATE_SYNCHRONIZATION; 1048 else 1049 port->actor_oper_port_state &= 1050 ~AD_STATE_SYNCHRONIZATION; 1051 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1052 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1053 ad_disable_collecting_distributing(port, 1054 update_slave_arr); 1055 port->ntt = true; 1056 break; 1057 case AD_MUX_COLLECTING_DISTRIBUTING: 1058 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1059 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1060 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1061 ad_enable_collecting_distributing(port, 1062 update_slave_arr); 1063 port->ntt = true; 1064 break; 1065 default: 1066 break; 1067 } 1068 } 1069 } 1070 1071 /** 1072 * ad_rx_machine - handle a port's rx State Machine 1073 * @lacpdu: the lacpdu we've received 1074 * @port: the port we're looking at 1075 * 1076 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1077 * CURRENT. If timer expired set the state machine in the proper state. 1078 * In other cases, this function checks if we need to switch to other state. 1079 */ 1080 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1081 { 1082 rx_states_t last_state; 1083 1084 /* keep current State Machine state to compare later if it was 1085 * changed 1086 */ 1087 last_state = port->sm_rx_state; 1088 1089 /* check if state machine should change state */ 1090 1091 /* first, check if port was reinitialized */ 1092 if (port->sm_vars & AD_PORT_BEGIN) { 1093 port->sm_rx_state = AD_RX_INITIALIZE; 1094 port->sm_vars |= AD_PORT_CHURNED; 1095 /* check if port is not enabled */ 1096 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1097 port->sm_rx_state = AD_RX_PORT_DISABLED; 1098 /* check if new lacpdu arrived */ 1099 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1100 (port->sm_rx_state == AD_RX_DEFAULTED) || 1101 (port->sm_rx_state == AD_RX_CURRENT))) { 1102 if (port->sm_rx_state != AD_RX_CURRENT) 1103 port->sm_vars |= AD_PORT_CHURNED; 1104 port->sm_rx_timer_counter = 0; 1105 port->sm_rx_state = AD_RX_CURRENT; 1106 } else { 1107 /* if timer is on, and if it is expired */ 1108 if (port->sm_rx_timer_counter && 1109 !(--port->sm_rx_timer_counter)) { 1110 switch (port->sm_rx_state) { 1111 case AD_RX_EXPIRED: 1112 port->sm_rx_state = AD_RX_DEFAULTED; 1113 break; 1114 case AD_RX_CURRENT: 1115 port->sm_rx_state = AD_RX_EXPIRED; 1116 break; 1117 default: 1118 break; 1119 } 1120 } else { 1121 /* if no lacpdu arrived and no timer is on */ 1122 switch (port->sm_rx_state) { 1123 case AD_RX_PORT_DISABLED: 1124 if (port->is_enabled && 1125 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1126 port->sm_rx_state = AD_RX_EXPIRED; 1127 else if (port->is_enabled 1128 && ((port->sm_vars 1129 & AD_PORT_LACP_ENABLED) == 0)) 1130 port->sm_rx_state = AD_RX_LACP_DISABLED; 1131 break; 1132 default: 1133 break; 1134 1135 } 1136 } 1137 } 1138 1139 /* check if the State machine was changed or new lacpdu arrived */ 1140 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1141 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1142 port->actor_port_number, 1143 port->slave->dev->name, 1144 last_state, 1145 port->sm_rx_state); 1146 switch (port->sm_rx_state) { 1147 case AD_RX_INITIALIZE: 1148 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1149 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1150 else 1151 port->sm_vars |= AD_PORT_LACP_ENABLED; 1152 port->sm_vars &= ~AD_PORT_SELECTED; 1153 __record_default(port); 1154 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1155 port->sm_rx_state = AD_RX_PORT_DISABLED; 1156 1157 /* Fall Through */ 1158 case AD_RX_PORT_DISABLED: 1159 port->sm_vars &= ~AD_PORT_MATCHED; 1160 break; 1161 case AD_RX_LACP_DISABLED: 1162 port->sm_vars &= ~AD_PORT_SELECTED; 1163 __record_default(port); 1164 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1165 port->sm_vars |= AD_PORT_MATCHED; 1166 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1167 break; 1168 case AD_RX_EXPIRED: 1169 /* Reset of the Synchronization flag (Standard 43.4.12) 1170 * This reset cause to disable this port in the 1171 * COLLECTING_DISTRIBUTING state of the mux machine in 1172 * case of EXPIRED even if LINK_DOWN didn't arrive for 1173 * the port. 1174 */ 1175 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1176 port->sm_vars &= ~AD_PORT_MATCHED; 1177 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1178 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1179 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1180 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1181 port->sm_vars |= AD_PORT_CHURNED; 1182 break; 1183 case AD_RX_DEFAULTED: 1184 __update_default_selected(port); 1185 __record_default(port); 1186 port->sm_vars |= AD_PORT_MATCHED; 1187 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1188 break; 1189 case AD_RX_CURRENT: 1190 /* detect loopback situation */ 1191 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1192 &(port->actor_system))) { 1193 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1194 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1195 port->slave->dev->name); 1196 return; 1197 } 1198 __update_selected(lacpdu, port); 1199 __update_ntt(lacpdu, port); 1200 __record_pdu(lacpdu, port); 1201 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1202 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1203 break; 1204 default: 1205 break; 1206 } 1207 } 1208 } 1209 1210 /** 1211 * ad_churn_machine - handle port churn's state machine 1212 * @port: the port we're looking at 1213 * 1214 */ 1215 static void ad_churn_machine(struct port *port) 1216 { 1217 if (port->sm_vars & AD_PORT_CHURNED) { 1218 port->sm_vars &= ~AD_PORT_CHURNED; 1219 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1220 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1221 port->sm_churn_actor_timer_counter = 1222 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1223 port->sm_churn_partner_timer_counter = 1224 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1225 return; 1226 } 1227 if (port->sm_churn_actor_timer_counter && 1228 !(--port->sm_churn_actor_timer_counter) && 1229 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1230 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1231 port->sm_churn_actor_state = AD_NO_CHURN; 1232 } else { 1233 port->churn_actor_count++; 1234 port->sm_churn_actor_state = AD_CHURN; 1235 } 1236 } 1237 if (port->sm_churn_partner_timer_counter && 1238 !(--port->sm_churn_partner_timer_counter) && 1239 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1240 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1241 port->sm_churn_partner_state = AD_NO_CHURN; 1242 } else { 1243 port->churn_partner_count++; 1244 port->sm_churn_partner_state = AD_CHURN; 1245 } 1246 } 1247 } 1248 1249 /** 1250 * ad_tx_machine - handle a port's tx state machine 1251 * @port: the port we're looking at 1252 */ 1253 static void ad_tx_machine(struct port *port) 1254 { 1255 /* check if tx timer expired, to verify that we do not send more than 1256 * 3 packets per second 1257 */ 1258 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1259 /* check if there is something to send */ 1260 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1261 __update_lacpdu_from_port(port); 1262 1263 if (ad_lacpdu_send(port) >= 0) { 1264 pr_debug("Sent LACPDU on port %d\n", 1265 port->actor_port_number); 1266 1267 /* mark ntt as false, so it will not be sent 1268 * again until demanded 1269 */ 1270 port->ntt = false; 1271 } 1272 } 1273 /* restart tx timer(to verify that we will not exceed 1274 * AD_MAX_TX_IN_SECOND 1275 */ 1276 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1277 } 1278 } 1279 1280 /** 1281 * ad_periodic_machine - handle a port's periodic state machine 1282 * @port: the port we're looking at 1283 * 1284 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1285 */ 1286 static void ad_periodic_machine(struct port *port) 1287 { 1288 periodic_states_t last_state; 1289 1290 /* keep current state machine state to compare later if it was changed */ 1291 last_state = port->sm_periodic_state; 1292 1293 /* check if port was reinitialized */ 1294 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1295 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1296 ) { 1297 port->sm_periodic_state = AD_NO_PERIODIC; 1298 } 1299 /* check if state machine should change state */ 1300 else if (port->sm_periodic_timer_counter) { 1301 /* check if periodic state machine expired */ 1302 if (!(--port->sm_periodic_timer_counter)) { 1303 /* if expired then do tx */ 1304 port->sm_periodic_state = AD_PERIODIC_TX; 1305 } else { 1306 /* If not expired, check if there is some new timeout 1307 * parameter from the partner state 1308 */ 1309 switch (port->sm_periodic_state) { 1310 case AD_FAST_PERIODIC: 1311 if (!(port->partner_oper.port_state 1312 & AD_STATE_LACP_TIMEOUT)) 1313 port->sm_periodic_state = AD_SLOW_PERIODIC; 1314 break; 1315 case AD_SLOW_PERIODIC: 1316 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1317 port->sm_periodic_timer_counter = 0; 1318 port->sm_periodic_state = AD_PERIODIC_TX; 1319 } 1320 break; 1321 default: 1322 break; 1323 } 1324 } 1325 } else { 1326 switch (port->sm_periodic_state) { 1327 case AD_NO_PERIODIC: 1328 port->sm_periodic_state = AD_FAST_PERIODIC; 1329 break; 1330 case AD_PERIODIC_TX: 1331 if (!(port->partner_oper.port_state & 1332 AD_STATE_LACP_TIMEOUT)) 1333 port->sm_periodic_state = AD_SLOW_PERIODIC; 1334 else 1335 port->sm_periodic_state = AD_FAST_PERIODIC; 1336 break; 1337 default: 1338 break; 1339 } 1340 } 1341 1342 /* check if the state machine was changed */ 1343 if (port->sm_periodic_state != last_state) { 1344 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1345 port->actor_port_number, last_state, 1346 port->sm_periodic_state); 1347 switch (port->sm_periodic_state) { 1348 case AD_NO_PERIODIC: 1349 port->sm_periodic_timer_counter = 0; 1350 break; 1351 case AD_FAST_PERIODIC: 1352 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1353 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1354 break; 1355 case AD_SLOW_PERIODIC: 1356 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1357 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1358 break; 1359 case AD_PERIODIC_TX: 1360 port->ntt = true; 1361 break; 1362 default: 1363 break; 1364 } 1365 } 1366 } 1367 1368 /** 1369 * ad_port_selection_logic - select aggregation groups 1370 * @port: the port we're looking at 1371 * @update_slave_arr: Does slave array need update? 1372 * 1373 * Select aggregation groups, and assign each port for it's aggregetor. The 1374 * selection logic is called in the inititalization (after all the handshkes), 1375 * and after every lacpdu receive (if selected is off). 1376 */ 1377 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1378 { 1379 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1380 struct port *last_port = NULL, *curr_port; 1381 struct list_head *iter; 1382 struct bonding *bond; 1383 struct slave *slave; 1384 int found = 0; 1385 1386 /* if the port is already Selected, do nothing */ 1387 if (port->sm_vars & AD_PORT_SELECTED) 1388 return; 1389 1390 bond = __get_bond_by_port(port); 1391 1392 /* if the port is connected to other aggregator, detach it */ 1393 if (port->aggregator) { 1394 /* detach the port from its former aggregator */ 1395 temp_aggregator = port->aggregator; 1396 for (curr_port = temp_aggregator->lag_ports; curr_port; 1397 last_port = curr_port, 1398 curr_port = curr_port->next_port_in_aggregator) { 1399 if (curr_port == port) { 1400 temp_aggregator->num_of_ports--; 1401 /* if it is the first port attached to the 1402 * aggregator 1403 */ 1404 if (!last_port) { 1405 temp_aggregator->lag_ports = 1406 port->next_port_in_aggregator; 1407 } else { 1408 /* not the first port attached to the 1409 * aggregator 1410 */ 1411 last_port->next_port_in_aggregator = 1412 port->next_port_in_aggregator; 1413 } 1414 1415 /* clear the port's relations to this 1416 * aggregator 1417 */ 1418 port->aggregator = NULL; 1419 port->next_port_in_aggregator = NULL; 1420 port->actor_port_aggregator_identifier = 0; 1421 1422 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1423 port->actor_port_number, 1424 temp_aggregator->aggregator_identifier); 1425 /* if the aggregator is empty, clear its 1426 * parameters, and set it ready to be attached 1427 */ 1428 if (!temp_aggregator->lag_ports) 1429 ad_clear_agg(temp_aggregator); 1430 break; 1431 } 1432 } 1433 if (!curr_port) { 1434 /* meaning: the port was related to an aggregator 1435 * but was not on the aggregator port list 1436 */ 1437 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1438 port->slave->bond->dev->name, 1439 port->actor_port_number, 1440 port->slave->dev->name, 1441 port->aggregator->aggregator_identifier); 1442 } 1443 } 1444 /* search on all aggregators for a suitable aggregator for this port */ 1445 bond_for_each_slave(bond, slave, iter) { 1446 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1447 1448 /* keep a free aggregator for later use(if needed) */ 1449 if (!aggregator->lag_ports) { 1450 if (!free_aggregator) 1451 free_aggregator = aggregator; 1452 continue; 1453 } 1454 /* check if current aggregator suits us */ 1455 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1456 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1457 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1458 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1459 ) && 1460 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1461 !aggregator->is_individual) /* but is not individual OR */ 1462 ) 1463 ) { 1464 /* attach to the founded aggregator */ 1465 port->aggregator = aggregator; 1466 port->actor_port_aggregator_identifier = 1467 port->aggregator->aggregator_identifier; 1468 port->next_port_in_aggregator = aggregator->lag_ports; 1469 port->aggregator->num_of_ports++; 1470 aggregator->lag_ports = port; 1471 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1472 port->actor_port_number, 1473 port->aggregator->aggregator_identifier); 1474 1475 /* mark this port as selected */ 1476 port->sm_vars |= AD_PORT_SELECTED; 1477 found = 1; 1478 break; 1479 } 1480 } 1481 1482 /* the port couldn't find an aggregator - attach it to a new 1483 * aggregator 1484 */ 1485 if (!found) { 1486 if (free_aggregator) { 1487 /* assign port a new aggregator */ 1488 port->aggregator = free_aggregator; 1489 port->actor_port_aggregator_identifier = 1490 port->aggregator->aggregator_identifier; 1491 1492 /* update the new aggregator's parameters 1493 * if port was responsed from the end-user 1494 */ 1495 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1496 /* if port is full duplex */ 1497 port->aggregator->is_individual = false; 1498 else 1499 port->aggregator->is_individual = true; 1500 1501 port->aggregator->actor_admin_aggregator_key = 1502 port->actor_admin_port_key; 1503 port->aggregator->actor_oper_aggregator_key = 1504 port->actor_oper_port_key; 1505 port->aggregator->partner_system = 1506 port->partner_oper.system; 1507 port->aggregator->partner_system_priority = 1508 port->partner_oper.system_priority; 1509 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1510 port->aggregator->receive_state = 1; 1511 port->aggregator->transmit_state = 1; 1512 port->aggregator->lag_ports = port; 1513 port->aggregator->num_of_ports++; 1514 1515 /* mark this port as selected */ 1516 port->sm_vars |= AD_PORT_SELECTED; 1517 1518 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1519 port->actor_port_number, 1520 port->aggregator->aggregator_identifier); 1521 } else { 1522 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1523 port->actor_port_number, port->slave->dev->name); 1524 } 1525 } 1526 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1527 * in all aggregator's ports, else set ready=FALSE in all 1528 * aggregator's ports 1529 */ 1530 __set_agg_ports_ready(port->aggregator, 1531 __agg_ports_are_ready(port->aggregator)); 1532 1533 aggregator = __get_first_agg(port); 1534 ad_agg_selection_logic(aggregator, update_slave_arr); 1535 1536 if (!port->aggregator->is_active) 1537 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1538 } 1539 1540 /* Decide if "agg" is a better choice for the new active aggregator that 1541 * the current best, according to the ad_select policy. 1542 */ 1543 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1544 struct aggregator *curr) 1545 { 1546 /* 0. If no best, select current. 1547 * 1548 * 1. If the current agg is not individual, and the best is 1549 * individual, select current. 1550 * 1551 * 2. If current agg is individual and the best is not, keep best. 1552 * 1553 * 3. Therefore, current and best are both individual or both not 1554 * individual, so: 1555 * 1556 * 3a. If current agg partner replied, and best agg partner did not, 1557 * select current. 1558 * 1559 * 3b. If current agg partner did not reply and best agg partner 1560 * did reply, keep best. 1561 * 1562 * 4. Therefore, current and best both have partner replies or 1563 * both do not, so perform selection policy: 1564 * 1565 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1566 * select by bandwidth. 1567 * 1568 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1569 */ 1570 if (!best) 1571 return curr; 1572 1573 if (!curr->is_individual && best->is_individual) 1574 return curr; 1575 1576 if (curr->is_individual && !best->is_individual) 1577 return best; 1578 1579 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1580 return curr; 1581 1582 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1583 return best; 1584 1585 switch (__get_agg_selection_mode(curr->lag_ports)) { 1586 case BOND_AD_COUNT: 1587 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1588 return curr; 1589 1590 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1591 return best; 1592 1593 /*FALLTHROUGH*/ 1594 case BOND_AD_STABLE: 1595 case BOND_AD_BANDWIDTH: 1596 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1597 return curr; 1598 1599 break; 1600 1601 default: 1602 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1603 curr->slave->bond->dev->name, 1604 __get_agg_selection_mode(curr->lag_ports)); 1605 break; 1606 } 1607 1608 return best; 1609 } 1610 1611 static int agg_device_up(const struct aggregator *agg) 1612 { 1613 struct port *port = agg->lag_ports; 1614 1615 if (!port) 1616 return 0; 1617 1618 for (port = agg->lag_ports; port; 1619 port = port->next_port_in_aggregator) { 1620 if (netif_running(port->slave->dev) && 1621 netif_carrier_ok(port->slave->dev)) 1622 return 1; 1623 } 1624 1625 return 0; 1626 } 1627 1628 /** 1629 * ad_agg_selection_logic - select an aggregation group for a team 1630 * @aggregator: the aggregator we're looking at 1631 * @update_slave_arr: Does slave array need update? 1632 * 1633 * It is assumed that only one aggregator may be selected for a team. 1634 * 1635 * The logic of this function is to select the aggregator according to 1636 * the ad_select policy: 1637 * 1638 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1639 * it, and to reselect the active aggregator only if the previous 1640 * aggregator has no more ports related to it. 1641 * 1642 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1643 * bandwidth, and reselect whenever a link state change takes place or the 1644 * set of slaves in the bond changes. 1645 * 1646 * BOND_AD_COUNT: select the aggregator with largest number of ports 1647 * (slaves), and reselect whenever a link state change takes place or the 1648 * set of slaves in the bond changes. 1649 * 1650 * FIXME: this function MUST be called with the first agg in the bond, or 1651 * __get_active_agg() won't work correctly. This function should be better 1652 * called with the bond itself, and retrieve the first agg from it. 1653 */ 1654 static void ad_agg_selection_logic(struct aggregator *agg, 1655 bool *update_slave_arr) 1656 { 1657 struct aggregator *best, *active, *origin; 1658 struct bonding *bond = agg->slave->bond; 1659 struct list_head *iter; 1660 struct slave *slave; 1661 struct port *port; 1662 1663 rcu_read_lock(); 1664 origin = agg; 1665 active = __get_active_agg(agg); 1666 best = (active && agg_device_up(active)) ? active : NULL; 1667 1668 bond_for_each_slave_rcu(bond, slave, iter) { 1669 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1670 1671 agg->is_active = 0; 1672 1673 if (__agg_active_ports(agg) && agg_device_up(agg)) 1674 best = ad_agg_selection_test(best, agg); 1675 } 1676 1677 if (best && 1678 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1679 /* For the STABLE policy, don't replace the old active 1680 * aggregator if it's still active (it has an answering 1681 * partner) or if both the best and active don't have an 1682 * answering partner. 1683 */ 1684 if (active && active->lag_ports && 1685 __agg_active_ports(active) && 1686 (__agg_has_partner(active) || 1687 (!__agg_has_partner(active) && 1688 !__agg_has_partner(best)))) { 1689 if (!(!active->actor_oper_aggregator_key && 1690 best->actor_oper_aggregator_key)) { 1691 best = NULL; 1692 active->is_active = 1; 1693 } 1694 } 1695 } 1696 1697 if (best && (best == active)) { 1698 best = NULL; 1699 active->is_active = 1; 1700 } 1701 1702 /* if there is new best aggregator, activate it */ 1703 if (best) { 1704 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1705 best->aggregator_identifier, best->num_of_ports, 1706 best->actor_oper_aggregator_key, 1707 best->partner_oper_aggregator_key, 1708 best->is_individual, best->is_active); 1709 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1710 best->lag_ports, best->slave, 1711 best->slave ? best->slave->dev->name : "NULL"); 1712 1713 bond_for_each_slave_rcu(bond, slave, iter) { 1714 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1715 1716 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1717 agg->aggregator_identifier, agg->num_of_ports, 1718 agg->actor_oper_aggregator_key, 1719 agg->partner_oper_aggregator_key, 1720 agg->is_individual, agg->is_active); 1721 } 1722 1723 /* check if any partner replys */ 1724 if (best->is_individual) { 1725 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1726 best->slave ? 1727 best->slave->bond->dev->name : "NULL"); 1728 } 1729 1730 best->is_active = 1; 1731 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1732 best->aggregator_identifier); 1733 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1734 best->aggregator_identifier, best->num_of_ports, 1735 best->actor_oper_aggregator_key, 1736 best->partner_oper_aggregator_key, 1737 best->is_individual, best->is_active); 1738 1739 /* disable the ports that were related to the former 1740 * active_aggregator 1741 */ 1742 if (active) { 1743 for (port = active->lag_ports; port; 1744 port = port->next_port_in_aggregator) { 1745 __disable_port(port); 1746 } 1747 } 1748 /* Slave array needs update. */ 1749 *update_slave_arr = true; 1750 } 1751 1752 /* if the selected aggregator is of join individuals 1753 * (partner_system is NULL), enable their ports 1754 */ 1755 active = __get_active_agg(origin); 1756 1757 if (active) { 1758 if (!__agg_has_partner(active)) { 1759 for (port = active->lag_ports; port; 1760 port = port->next_port_in_aggregator) { 1761 __enable_port(port); 1762 } 1763 } 1764 } 1765 1766 rcu_read_unlock(); 1767 1768 bond_3ad_set_carrier(bond); 1769 } 1770 1771 /** 1772 * ad_clear_agg - clear a given aggregator's parameters 1773 * @aggregator: the aggregator we're looking at 1774 */ 1775 static void ad_clear_agg(struct aggregator *aggregator) 1776 { 1777 if (aggregator) { 1778 aggregator->is_individual = false; 1779 aggregator->actor_admin_aggregator_key = 0; 1780 aggregator->actor_oper_aggregator_key = 0; 1781 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1782 aggregator->partner_system_priority = 0; 1783 aggregator->partner_oper_aggregator_key = 0; 1784 aggregator->receive_state = 0; 1785 aggregator->transmit_state = 0; 1786 aggregator->lag_ports = NULL; 1787 aggregator->is_active = 0; 1788 aggregator->num_of_ports = 0; 1789 pr_debug("LAG %d was cleared\n", 1790 aggregator->aggregator_identifier); 1791 } 1792 } 1793 1794 /** 1795 * ad_initialize_agg - initialize a given aggregator's parameters 1796 * @aggregator: the aggregator we're looking at 1797 */ 1798 static void ad_initialize_agg(struct aggregator *aggregator) 1799 { 1800 if (aggregator) { 1801 ad_clear_agg(aggregator); 1802 1803 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1804 aggregator->aggregator_identifier = 0; 1805 aggregator->slave = NULL; 1806 } 1807 } 1808 1809 /** 1810 * ad_initialize_port - initialize a given port's parameters 1811 * @aggregator: the aggregator we're looking at 1812 * @lacp_fast: boolean. whether fast periodic should be used 1813 */ 1814 static void ad_initialize_port(struct port *port, int lacp_fast) 1815 { 1816 static const struct port_params tmpl = { 1817 .system_priority = 0xffff, 1818 .key = 1, 1819 .port_number = 1, 1820 .port_priority = 0xff, 1821 .port_state = 1, 1822 }; 1823 static const struct lacpdu lacpdu = { 1824 .subtype = 0x01, 1825 .version_number = 0x01, 1826 .tlv_type_actor_info = 0x01, 1827 .actor_information_length = 0x14, 1828 .tlv_type_partner_info = 0x02, 1829 .partner_information_length = 0x14, 1830 .tlv_type_collector_info = 0x03, 1831 .collector_information_length = 0x10, 1832 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1833 }; 1834 1835 if (port) { 1836 port->actor_port_priority = 0xff; 1837 port->actor_port_aggregator_identifier = 0; 1838 port->ntt = false; 1839 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1840 AD_STATE_LACP_ACTIVITY; 1841 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1842 AD_STATE_LACP_ACTIVITY; 1843 1844 if (lacp_fast) 1845 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1846 1847 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1848 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1849 1850 port->is_enabled = true; 1851 /* private parameters */ 1852 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1853 port->sm_rx_state = 0; 1854 port->sm_rx_timer_counter = 0; 1855 port->sm_periodic_state = 0; 1856 port->sm_periodic_timer_counter = 0; 1857 port->sm_mux_state = 0; 1858 port->sm_mux_timer_counter = 0; 1859 port->sm_tx_state = 0; 1860 port->aggregator = NULL; 1861 port->next_port_in_aggregator = NULL; 1862 port->transaction_id = 0; 1863 1864 port->sm_churn_actor_timer_counter = 0; 1865 port->sm_churn_actor_state = 0; 1866 port->churn_actor_count = 0; 1867 port->sm_churn_partner_timer_counter = 0; 1868 port->sm_churn_partner_state = 0; 1869 port->churn_partner_count = 0; 1870 1871 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1872 } 1873 } 1874 1875 /** 1876 * ad_enable_collecting_distributing - enable a port's transmit/receive 1877 * @port: the port we're looking at 1878 * @update_slave_arr: Does slave array need update? 1879 * 1880 * Enable @port if it's in an active aggregator 1881 */ 1882 static void ad_enable_collecting_distributing(struct port *port, 1883 bool *update_slave_arr) 1884 { 1885 if (port->aggregator->is_active) { 1886 pr_debug("Enabling port %d(LAG %d)\n", 1887 port->actor_port_number, 1888 port->aggregator->aggregator_identifier); 1889 __enable_port(port); 1890 /* Slave array needs update */ 1891 *update_slave_arr = true; 1892 } 1893 } 1894 1895 /** 1896 * ad_disable_collecting_distributing - disable a port's transmit/receive 1897 * @port: the port we're looking at 1898 * @update_slave_arr: Does slave array need update? 1899 */ 1900 static void ad_disable_collecting_distributing(struct port *port, 1901 bool *update_slave_arr) 1902 { 1903 if (port->aggregator && 1904 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1905 &(null_mac_addr))) { 1906 pr_debug("Disabling port %d(LAG %d)\n", 1907 port->actor_port_number, 1908 port->aggregator->aggregator_identifier); 1909 __disable_port(port); 1910 /* Slave array needs an update */ 1911 *update_slave_arr = true; 1912 } 1913 } 1914 1915 /** 1916 * ad_marker_info_received - handle receive of a Marker information frame 1917 * @marker_info: Marker info received 1918 * @port: the port we're looking at 1919 */ 1920 static void ad_marker_info_received(struct bond_marker *marker_info, 1921 struct port *port) 1922 { 1923 struct bond_marker marker; 1924 1925 /* copy the received marker data to the response marker */ 1926 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1927 /* change the marker subtype to marker response */ 1928 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1929 1930 /* send the marker response */ 1931 if (ad_marker_send(port, &marker) >= 0) { 1932 pr_debug("Sent Marker Response on port %d\n", 1933 port->actor_port_number); 1934 } 1935 } 1936 1937 /** 1938 * ad_marker_response_received - handle receive of a marker response frame 1939 * @marker: marker PDU received 1940 * @port: the port we're looking at 1941 * 1942 * This function does nothing since we decided not to implement send and handle 1943 * response for marker PDU's, in this stage, but only to respond to marker 1944 * information. 1945 */ 1946 static void ad_marker_response_received(struct bond_marker *marker, 1947 struct port *port) 1948 { 1949 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1950 } 1951 1952 /* ========= AD exported functions to the main bonding code ========= */ 1953 1954 /* Check aggregators status in team every T seconds */ 1955 #define AD_AGGREGATOR_SELECTION_TIMER 8 1956 1957 /** 1958 * bond_3ad_initiate_agg_selection - initate aggregator selection 1959 * @bond: bonding struct 1960 * 1961 * Set the aggregation selection timer, to initiate an agg selection in 1962 * the very near future. Called during first initialization, and during 1963 * any down to up transitions of the bond. 1964 */ 1965 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1966 { 1967 BOND_AD_INFO(bond).agg_select_timer = timeout; 1968 } 1969 1970 /** 1971 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1972 * @bond: bonding struct to work on 1973 * @tick_resolution: tick duration (millisecond resolution) 1974 * 1975 * Can be called only after the mac address of the bond is set. 1976 */ 1977 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1978 { 1979 /* check that the bond is not initialized yet */ 1980 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1981 bond->dev->dev_addr)) { 1982 1983 BOND_AD_INFO(bond).aggregator_identifier = 0; 1984 1985 BOND_AD_INFO(bond).system.sys_priority = 1986 bond->params.ad_actor_sys_prio; 1987 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1988 BOND_AD_INFO(bond).system.sys_mac_addr = 1989 *((struct mac_addr *)bond->dev->dev_addr); 1990 else 1991 BOND_AD_INFO(bond).system.sys_mac_addr = 1992 *((struct mac_addr *)bond->params.ad_actor_system); 1993 1994 /* initialize how many times this module is called in one 1995 * second (should be about every 100ms) 1996 */ 1997 ad_ticks_per_sec = tick_resolution; 1998 1999 bond_3ad_initiate_agg_selection(bond, 2000 AD_AGGREGATOR_SELECTION_TIMER * 2001 ad_ticks_per_sec); 2002 } 2003 } 2004 2005 /** 2006 * bond_3ad_bind_slave - initialize a slave's port 2007 * @slave: slave struct to work on 2008 * 2009 * Returns: 0 on success 2010 * < 0 on error 2011 */ 2012 void bond_3ad_bind_slave(struct slave *slave) 2013 { 2014 struct bonding *bond = bond_get_bond_by_slave(slave); 2015 struct port *port; 2016 struct aggregator *aggregator; 2017 2018 /* check that the slave has not been initialized yet. */ 2019 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2020 2021 /* port initialization */ 2022 port = &(SLAVE_AD_INFO(slave)->port); 2023 2024 ad_initialize_port(port, bond->params.lacp_fast); 2025 2026 port->slave = slave; 2027 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2028 /* key is determined according to the link speed, duplex and 2029 * user key 2030 */ 2031 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2032 ad_update_actor_keys(port, false); 2033 /* actor system is the bond's system */ 2034 __ad_actor_update_port(port); 2035 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2036 * lacpdu's are sent in one second) 2037 */ 2038 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2039 2040 __disable_port(port); 2041 2042 /* aggregator initialization */ 2043 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2044 2045 ad_initialize_agg(aggregator); 2046 2047 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2048 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2049 aggregator->slave = slave; 2050 aggregator->is_active = 0; 2051 aggregator->num_of_ports = 0; 2052 } 2053 } 2054 2055 /** 2056 * bond_3ad_unbind_slave - deinitialize a slave's port 2057 * @slave: slave struct to work on 2058 * 2059 * Search for the aggregator that is related to this port, remove the 2060 * aggregator and assign another aggregator for other port related to it 2061 * (if any), and remove the port. 2062 */ 2063 void bond_3ad_unbind_slave(struct slave *slave) 2064 { 2065 struct port *port, *prev_port, *temp_port; 2066 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2067 int select_new_active_agg = 0; 2068 struct bonding *bond = slave->bond; 2069 struct slave *slave_iter; 2070 struct list_head *iter; 2071 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2072 2073 /* Sync against bond_3ad_state_machine_handler() */ 2074 spin_lock_bh(&bond->mode_lock); 2075 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2076 port = &(SLAVE_AD_INFO(slave)->port); 2077 2078 /* if slave is null, the whole port is not initialized */ 2079 if (!port->slave) { 2080 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2081 slave->dev->name); 2082 goto out; 2083 } 2084 2085 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2086 aggregator->aggregator_identifier); 2087 2088 /* Tell the partner that this port is not suitable for aggregation */ 2089 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 2090 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 2091 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 2092 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2093 __update_lacpdu_from_port(port); 2094 ad_lacpdu_send(port); 2095 2096 /* check if this aggregator is occupied */ 2097 if (aggregator->lag_ports) { 2098 /* check if there are other ports related to this aggregator 2099 * except the port related to this slave(thats ensure us that 2100 * there is a reason to search for new aggregator, and that we 2101 * will find one 2102 */ 2103 if ((aggregator->lag_ports != port) || 2104 (aggregator->lag_ports->next_port_in_aggregator)) { 2105 /* find new aggregator for the related port(s) */ 2106 bond_for_each_slave(bond, slave_iter, iter) { 2107 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2108 /* if the new aggregator is empty, or it is 2109 * connected to our port only 2110 */ 2111 if (!new_aggregator->lag_ports || 2112 ((new_aggregator->lag_ports == port) && 2113 !new_aggregator->lag_ports->next_port_in_aggregator)) 2114 break; 2115 } 2116 if (!slave_iter) 2117 new_aggregator = NULL; 2118 2119 /* if new aggregator found, copy the aggregator's 2120 * parameters and connect the related lag_ports to the 2121 * new aggregator 2122 */ 2123 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2124 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2125 aggregator->aggregator_identifier, 2126 new_aggregator->aggregator_identifier); 2127 2128 if ((new_aggregator->lag_ports == port) && 2129 new_aggregator->is_active) { 2130 netdev_info(bond->dev, "Removing an active aggregator\n"); 2131 select_new_active_agg = 1; 2132 } 2133 2134 new_aggregator->is_individual = aggregator->is_individual; 2135 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2136 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2137 new_aggregator->partner_system = aggregator->partner_system; 2138 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2139 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2140 new_aggregator->receive_state = aggregator->receive_state; 2141 new_aggregator->transmit_state = aggregator->transmit_state; 2142 new_aggregator->lag_ports = aggregator->lag_ports; 2143 new_aggregator->is_active = aggregator->is_active; 2144 new_aggregator->num_of_ports = aggregator->num_of_ports; 2145 2146 /* update the information that is written on 2147 * the ports about the aggregator 2148 */ 2149 for (temp_port = aggregator->lag_ports; temp_port; 2150 temp_port = temp_port->next_port_in_aggregator) { 2151 temp_port->aggregator = new_aggregator; 2152 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2153 } 2154 2155 ad_clear_agg(aggregator); 2156 2157 if (select_new_active_agg) 2158 ad_agg_selection_logic(__get_first_agg(port), 2159 &dummy_slave_update); 2160 } else { 2161 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2162 } 2163 } else { 2164 /* in case that the only port related to this 2165 * aggregator is the one we want to remove 2166 */ 2167 select_new_active_agg = aggregator->is_active; 2168 ad_clear_agg(aggregator); 2169 if (select_new_active_agg) { 2170 netdev_info(bond->dev, "Removing an active aggregator\n"); 2171 /* select new active aggregator */ 2172 temp_aggregator = __get_first_agg(port); 2173 if (temp_aggregator) 2174 ad_agg_selection_logic(temp_aggregator, 2175 &dummy_slave_update); 2176 } 2177 } 2178 } 2179 2180 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2181 2182 /* find the aggregator that this port is connected to */ 2183 bond_for_each_slave(bond, slave_iter, iter) { 2184 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2185 prev_port = NULL; 2186 /* search the port in the aggregator's related ports */ 2187 for (temp_port = temp_aggregator->lag_ports; temp_port; 2188 prev_port = temp_port, 2189 temp_port = temp_port->next_port_in_aggregator) { 2190 if (temp_port == port) { 2191 /* the aggregator found - detach the port from 2192 * this aggregator 2193 */ 2194 if (prev_port) 2195 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2196 else 2197 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2198 temp_aggregator->num_of_ports--; 2199 if (__agg_active_ports(temp_aggregator) == 0) { 2200 select_new_active_agg = temp_aggregator->is_active; 2201 ad_clear_agg(temp_aggregator); 2202 if (select_new_active_agg) { 2203 netdev_info(bond->dev, "Removing an active aggregator\n"); 2204 /* select new active aggregator */ 2205 ad_agg_selection_logic(__get_first_agg(port), 2206 &dummy_slave_update); 2207 } 2208 } 2209 break; 2210 } 2211 } 2212 } 2213 port->slave = NULL; 2214 2215 out: 2216 spin_unlock_bh(&bond->mode_lock); 2217 } 2218 2219 /** 2220 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2221 * @bond: bonding struct to work on 2222 * 2223 * If an ad_actor setting gets changed we need to update the individual port 2224 * settings so the bond device will use the new values when it gets upped. 2225 */ 2226 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2227 { 2228 struct list_head *iter; 2229 struct slave *slave; 2230 2231 ASSERT_RTNL(); 2232 2233 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2234 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2235 BOND_AD_INFO(bond).system.sys_mac_addr = 2236 *((struct mac_addr *)bond->dev->dev_addr); 2237 else 2238 BOND_AD_INFO(bond).system.sys_mac_addr = 2239 *((struct mac_addr *)bond->params.ad_actor_system); 2240 2241 spin_lock_bh(&bond->mode_lock); 2242 bond_for_each_slave(bond, slave, iter) { 2243 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2244 2245 __ad_actor_update_port(port); 2246 port->ntt = true; 2247 } 2248 spin_unlock_bh(&bond->mode_lock); 2249 } 2250 2251 /** 2252 * bond_3ad_state_machine_handler - handle state machines timeout 2253 * @bond: bonding struct to work on 2254 * 2255 * The state machine handling concept in this module is to check every tick 2256 * which state machine should operate any function. The execution order is 2257 * round robin, so when we have an interaction between state machines, the 2258 * reply of one to each other might be delayed until next tick. 2259 * 2260 * This function also complete the initialization when the agg_select_timer 2261 * times out, and it selects an aggregator for the ports that are yet not 2262 * related to any aggregator, and selects the active aggregator for a bond. 2263 */ 2264 void bond_3ad_state_machine_handler(struct work_struct *work) 2265 { 2266 struct bonding *bond = container_of(work, struct bonding, 2267 ad_work.work); 2268 struct aggregator *aggregator; 2269 struct list_head *iter; 2270 struct slave *slave; 2271 struct port *port; 2272 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2273 bool update_slave_arr = false; 2274 2275 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2276 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2277 * concurrently due to incoming LACPDU as well. 2278 */ 2279 spin_lock_bh(&bond->mode_lock); 2280 rcu_read_lock(); 2281 2282 /* check if there are any slaves */ 2283 if (!bond_has_slaves(bond)) 2284 goto re_arm; 2285 2286 /* check if agg_select_timer timer after initialize is timed out */ 2287 if (BOND_AD_INFO(bond).agg_select_timer && 2288 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2289 slave = bond_first_slave_rcu(bond); 2290 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2291 2292 /* select the active aggregator for the bond */ 2293 if (port) { 2294 if (!port->slave) { 2295 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2296 bond->dev->name); 2297 goto re_arm; 2298 } 2299 2300 aggregator = __get_first_agg(port); 2301 ad_agg_selection_logic(aggregator, &update_slave_arr); 2302 } 2303 bond_3ad_set_carrier(bond); 2304 } 2305 2306 /* for each port run the state machines */ 2307 bond_for_each_slave_rcu(bond, slave, iter) { 2308 port = &(SLAVE_AD_INFO(slave)->port); 2309 if (!port->slave) { 2310 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2311 bond->dev->name); 2312 goto re_arm; 2313 } 2314 2315 ad_rx_machine(NULL, port); 2316 ad_periodic_machine(port); 2317 ad_port_selection_logic(port, &update_slave_arr); 2318 ad_mux_machine(port, &update_slave_arr); 2319 ad_tx_machine(port); 2320 ad_churn_machine(port); 2321 2322 /* turn off the BEGIN bit, since we already handled it */ 2323 if (port->sm_vars & AD_PORT_BEGIN) 2324 port->sm_vars &= ~AD_PORT_BEGIN; 2325 } 2326 2327 re_arm: 2328 bond_for_each_slave_rcu(bond, slave, iter) { 2329 if (slave->should_notify) { 2330 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2331 break; 2332 } 2333 } 2334 rcu_read_unlock(); 2335 spin_unlock_bh(&bond->mode_lock); 2336 2337 if (update_slave_arr) 2338 bond_slave_arr_work_rearm(bond, 0); 2339 2340 if (should_notify_rtnl && rtnl_trylock()) { 2341 bond_slave_state_notify(bond); 2342 rtnl_unlock(); 2343 } 2344 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2345 } 2346 2347 /** 2348 * bond_3ad_rx_indication - handle a received frame 2349 * @lacpdu: received lacpdu 2350 * @slave: slave struct to work on 2351 * @length: length of the data received 2352 * 2353 * It is assumed that frames that were sent on this NIC don't returned as new 2354 * received frames (loopback). Since only the payload is given to this 2355 * function, it check for loopback. 2356 */ 2357 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, 2358 u16 length) 2359 { 2360 struct port *port; 2361 int ret = RX_HANDLER_ANOTHER; 2362 2363 if (length >= sizeof(struct lacpdu)) { 2364 2365 port = &(SLAVE_AD_INFO(slave)->port); 2366 2367 if (!port->slave) { 2368 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2369 slave->dev->name, slave->bond->dev->name); 2370 return ret; 2371 } 2372 2373 switch (lacpdu->subtype) { 2374 case AD_TYPE_LACPDU: 2375 ret = RX_HANDLER_CONSUMED; 2376 netdev_dbg(slave->bond->dev, 2377 "Received LACPDU on port %d slave %s\n", 2378 port->actor_port_number, 2379 slave->dev->name); 2380 /* Protect against concurrent state machines */ 2381 spin_lock(&slave->bond->mode_lock); 2382 ad_rx_machine(lacpdu, port); 2383 spin_unlock(&slave->bond->mode_lock); 2384 break; 2385 2386 case AD_TYPE_MARKER: 2387 ret = RX_HANDLER_CONSUMED; 2388 /* No need to convert fields to Little Endian since we 2389 * don't use the marker's fields. 2390 */ 2391 2392 switch (((struct bond_marker *)lacpdu)->tlv_type) { 2393 case AD_MARKER_INFORMATION_SUBTYPE: 2394 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2395 port->actor_port_number); 2396 ad_marker_info_received((struct bond_marker *)lacpdu, port); 2397 break; 2398 2399 case AD_MARKER_RESPONSE_SUBTYPE: 2400 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2401 port->actor_port_number); 2402 ad_marker_response_received((struct bond_marker *)lacpdu, port); 2403 break; 2404 2405 default: 2406 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2407 port->actor_port_number); 2408 } 2409 } 2410 } 2411 return ret; 2412 } 2413 2414 /** 2415 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2416 * its current speed and duplex settings. 2417 * 2418 * @port: the port we'are looking at 2419 * @reset: Boolean to just reset the speed and the duplex part of the key 2420 * 2421 * The logic to change the oper / admin keys is: 2422 * (a) A full duplex port can participate in LACP with partner. 2423 * (b) When the speed is changed, LACP need to be reinitiated. 2424 */ 2425 static void ad_update_actor_keys(struct port *port, bool reset) 2426 { 2427 u8 duplex = 0; 2428 u16 ospeed = 0, speed = 0; 2429 u16 old_oper_key = port->actor_oper_port_key; 2430 2431 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2432 if (!reset) { 2433 speed = __get_link_speed(port); 2434 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2435 duplex = __get_duplex(port); 2436 port->actor_admin_port_key |= (speed << 1) | duplex; 2437 } 2438 port->actor_oper_port_key = port->actor_admin_port_key; 2439 2440 if (old_oper_key != port->actor_oper_port_key) { 2441 /* Only 'duplex' port participates in LACP */ 2442 if (duplex) 2443 port->sm_vars |= AD_PORT_LACP_ENABLED; 2444 else 2445 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2446 2447 if (!reset) { 2448 if (!speed) { 2449 netdev_err(port->slave->dev, 2450 "speed changed to 0 for port %s", 2451 port->slave->dev->name); 2452 } else if (duplex && ospeed != speed) { 2453 /* Speed change restarts LACP state-machine */ 2454 port->sm_vars |= AD_PORT_BEGIN; 2455 } 2456 } 2457 } 2458 } 2459 2460 /** 2461 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2462 * change indication 2463 * 2464 * @slave: slave struct to work on 2465 * 2466 * Handle reselection of aggregator (if needed) for this port. 2467 */ 2468 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2469 { 2470 struct port *port; 2471 2472 port = &(SLAVE_AD_INFO(slave)->port); 2473 2474 /* if slave is null, the whole port is not initialized */ 2475 if (!port->slave) { 2476 netdev_warn(slave->bond->dev, 2477 "speed/duplex changed for uninitialized port %s\n", 2478 slave->dev->name); 2479 return; 2480 } 2481 2482 spin_lock_bh(&slave->bond->mode_lock); 2483 ad_update_actor_keys(port, false); 2484 spin_unlock_bh(&slave->bond->mode_lock); 2485 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", 2486 port->actor_port_number, slave->dev->name); 2487 } 2488 2489 /** 2490 * bond_3ad_handle_link_change - handle a slave's link status change indication 2491 * @slave: slave struct to work on 2492 * @status: whether the link is now up or down 2493 * 2494 * Handle reselection of aggregator (if needed) for this port. 2495 */ 2496 void bond_3ad_handle_link_change(struct slave *slave, char link) 2497 { 2498 struct aggregator *agg; 2499 struct port *port; 2500 bool dummy; 2501 2502 port = &(SLAVE_AD_INFO(slave)->port); 2503 2504 /* if slave is null, the whole port is not initialized */ 2505 if (!port->slave) { 2506 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2507 slave->dev->name); 2508 return; 2509 } 2510 2511 spin_lock_bh(&slave->bond->mode_lock); 2512 /* on link down we are zeroing duplex and speed since 2513 * some of the adaptors(ce1000.lan) report full duplex/speed 2514 * instead of N/A(duplex) / 0(speed). 2515 * 2516 * on link up we are forcing recheck on the duplex and speed since 2517 * some of he adaptors(ce1000.lan) report. 2518 */ 2519 if (link == BOND_LINK_UP) { 2520 port->is_enabled = true; 2521 ad_update_actor_keys(port, false); 2522 } else { 2523 /* link has failed */ 2524 port->is_enabled = false; 2525 ad_update_actor_keys(port, true); 2526 } 2527 agg = __get_first_agg(port); 2528 ad_agg_selection_logic(agg, &dummy); 2529 2530 spin_unlock_bh(&slave->bond->mode_lock); 2531 2532 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2533 port->actor_port_number, 2534 link == BOND_LINK_UP ? "UP" : "DOWN"); 2535 2536 /* RTNL is held and mode_lock is released so it's safe 2537 * to update slave_array here. 2538 */ 2539 bond_update_slave_arr(slave->bond, NULL); 2540 } 2541 2542 /** 2543 * bond_3ad_set_carrier - set link state for bonding master 2544 * @bond - bonding structure 2545 * 2546 * if we have an active aggregator, we're up, if not, we're down. 2547 * Presumes that we cannot have an active aggregator if there are 2548 * no slaves with link up. 2549 * 2550 * This behavior complies with IEEE 802.3 section 43.3.9. 2551 * 2552 * Called by bond_set_carrier(). Return zero if carrier state does not 2553 * change, nonzero if it does. 2554 */ 2555 int bond_3ad_set_carrier(struct bonding *bond) 2556 { 2557 struct aggregator *active; 2558 struct slave *first_slave; 2559 int ret = 1; 2560 2561 rcu_read_lock(); 2562 first_slave = bond_first_slave_rcu(bond); 2563 if (!first_slave) { 2564 ret = 0; 2565 goto out; 2566 } 2567 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2568 if (active) { 2569 /* are enough slaves available to consider link up? */ 2570 if (__agg_active_ports(active) < bond->params.min_links) { 2571 if (netif_carrier_ok(bond->dev)) { 2572 netif_carrier_off(bond->dev); 2573 goto out; 2574 } 2575 } else if (!netif_carrier_ok(bond->dev)) { 2576 netif_carrier_on(bond->dev); 2577 goto out; 2578 } 2579 } else if (netif_carrier_ok(bond->dev)) { 2580 netif_carrier_off(bond->dev); 2581 } 2582 out: 2583 rcu_read_unlock(); 2584 return ret; 2585 } 2586 2587 /** 2588 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2589 * @bond: bonding struct to work on 2590 * @ad_info: ad_info struct to fill with the bond's info 2591 * 2592 * Returns: 0 on success 2593 * < 0 on error 2594 */ 2595 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2596 struct ad_info *ad_info) 2597 { 2598 struct aggregator *aggregator = NULL; 2599 struct list_head *iter; 2600 struct slave *slave; 2601 struct port *port; 2602 2603 bond_for_each_slave_rcu(bond, slave, iter) { 2604 port = &(SLAVE_AD_INFO(slave)->port); 2605 if (port->aggregator && port->aggregator->is_active) { 2606 aggregator = port->aggregator; 2607 break; 2608 } 2609 } 2610 2611 if (!aggregator) 2612 return -1; 2613 2614 ad_info->aggregator_id = aggregator->aggregator_identifier; 2615 ad_info->ports = __agg_active_ports(aggregator); 2616 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2617 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2618 ether_addr_copy(ad_info->partner_system, 2619 aggregator->partner_system.mac_addr_value); 2620 return 0; 2621 } 2622 2623 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2624 { 2625 int ret; 2626 2627 rcu_read_lock(); 2628 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2629 rcu_read_unlock(); 2630 2631 return ret; 2632 } 2633 2634 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2635 struct slave *slave) 2636 { 2637 struct lacpdu *lacpdu, _lacpdu; 2638 2639 if (skb->protocol != PKT_TYPE_LACPDU) 2640 return RX_HANDLER_ANOTHER; 2641 2642 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2643 return RX_HANDLER_ANOTHER; 2644 2645 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2646 if (!lacpdu) 2647 return RX_HANDLER_ANOTHER; 2648 2649 return bond_3ad_rx_indication(lacpdu, slave, skb->len); 2650 } 2651 2652 /** 2653 * bond_3ad_update_lacp_rate - change the lacp rate 2654 * @bond - bonding struct 2655 * 2656 * When modify lacp_rate parameter via sysfs, 2657 * update actor_oper_port_state of each port. 2658 * 2659 * Hold bond->mode_lock, 2660 * so we can modify port->actor_oper_port_state, 2661 * no matter bond is up or down. 2662 */ 2663 void bond_3ad_update_lacp_rate(struct bonding *bond) 2664 { 2665 struct port *port = NULL; 2666 struct list_head *iter; 2667 struct slave *slave; 2668 int lacp_fast; 2669 2670 lacp_fast = bond->params.lacp_fast; 2671 spin_lock_bh(&bond->mode_lock); 2672 bond_for_each_slave(bond, slave, iter) { 2673 port = &(SLAVE_AD_INFO(slave)->port); 2674 if (lacp_fast) 2675 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2676 else 2677 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2678 } 2679 spin_unlock_bh(&bond->mode_lock); 2680 } 2681