1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 4 */ 5 6 #include <linux/skbuff.h> 7 #include <linux/if_ether.h> 8 #include <linux/netdevice.h> 9 #include <linux/spinlock.h> 10 #include <linux/ethtool.h> 11 #include <linux/etherdevice.h> 12 #include <linux/if_bonding.h> 13 #include <linux/pkt_sched.h> 14 #include <net/net_namespace.h> 15 #include <net/bonding.h> 16 #include <net/bond_3ad.h> 17 #include <net/netlink.h> 18 19 /* General definitions */ 20 #define AD_SHORT_TIMEOUT 1 21 #define AD_LONG_TIMEOUT 0 22 #define AD_STANDBY 0x2 23 #define AD_MAX_TX_IN_SECOND 3 24 #define AD_COLLECTOR_MAX_DELAY 0 25 26 /* Timer definitions (43.4.4 in the 802.3ad standard) */ 27 #define AD_FAST_PERIODIC_TIME 1 28 #define AD_SLOW_PERIODIC_TIME 30 29 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 30 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 31 #define AD_CHURN_DETECTION_TIME 60 32 #define AD_AGGREGATE_WAIT_TIME 2 33 34 /* Port Variables definitions used by the State Machines (43.4.7 in the 35 * 802.3ad standard) 36 */ 37 #define AD_PORT_BEGIN 0x1 38 #define AD_PORT_LACP_ENABLED 0x2 39 #define AD_PORT_ACTOR_CHURN 0x4 40 #define AD_PORT_PARTNER_CHURN 0x8 41 #define AD_PORT_READY 0x10 42 #define AD_PORT_READY_N 0x20 43 #define AD_PORT_MATCHED 0x40 44 #define AD_PORT_STANDBY 0x80 45 #define AD_PORT_SELECTED 0x100 46 #define AD_PORT_MOVED 0x200 47 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) 48 49 /* Port Key definitions 50 * key is determined according to the link speed, duplex and 51 * user key (which is yet not supported) 52 * -------------------------------------------------------------- 53 * Port key | User key (10 bits) | Speed (5 bits) | Duplex| 54 * -------------------------------------------------------------- 55 * |15 6|5 1|0 56 */ 57 #define AD_DUPLEX_KEY_MASKS 0x1 58 #define AD_SPEED_KEY_MASKS 0x3E 59 #define AD_USER_KEY_MASKS 0xFFC0 60 61 enum ad_link_speed_type { 62 AD_LINK_SPEED_1MBPS = 1, 63 AD_LINK_SPEED_10MBPS, 64 AD_LINK_SPEED_100MBPS, 65 AD_LINK_SPEED_1000MBPS, 66 AD_LINK_SPEED_2500MBPS, 67 AD_LINK_SPEED_5000MBPS, 68 AD_LINK_SPEED_10000MBPS, 69 AD_LINK_SPEED_14000MBPS, 70 AD_LINK_SPEED_20000MBPS, 71 AD_LINK_SPEED_25000MBPS, 72 AD_LINK_SPEED_40000MBPS, 73 AD_LINK_SPEED_50000MBPS, 74 AD_LINK_SPEED_56000MBPS, 75 AD_LINK_SPEED_100000MBPS, 76 AD_LINK_SPEED_200000MBPS, 77 AD_LINK_SPEED_400000MBPS, 78 }; 79 80 /* compare MAC addresses */ 81 #define MAC_ADDRESS_EQUAL(A, B) \ 82 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 83 84 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 85 0, 0, 0, 0, 0, 0 86 }; 87 88 static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL; 89 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 90 91 const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = { 92 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02 93 }; 94 95 /* ================= main 802.3ad protocol functions ================== */ 96 static int ad_lacpdu_send(struct port *port); 97 static int ad_marker_send(struct port *port, struct bond_marker *marker); 98 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 99 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 100 static void ad_tx_machine(struct port *port); 101 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params); 102 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 103 static void ad_agg_selection_logic(struct aggregator *aggregator, 104 bool *update_slave_arr); 105 static void ad_clear_agg(struct aggregator *aggregator); 106 static void ad_initialize_agg(struct aggregator *aggregator); 107 static void ad_initialize_port(struct port *port, int lacp_fast); 108 static void ad_enable_collecting_distributing(struct port *port, 109 bool *update_slave_arr); 110 static void ad_disable_collecting_distributing(struct port *port, 111 bool *update_slave_arr); 112 static void ad_marker_info_received(struct bond_marker *marker_info, 113 struct port *port); 114 static void ad_marker_response_received(struct bond_marker *marker, 115 struct port *port); 116 static void ad_update_actor_keys(struct port *port, bool reset); 117 118 119 /* ================= api to bonding and kernel code ================== */ 120 121 /** 122 * __get_bond_by_port - get the port's bonding struct 123 * @port: the port we're looking at 124 * 125 * Return @port's bonding struct, or %NULL if it can't be found. 126 */ 127 static inline struct bonding *__get_bond_by_port(struct port *port) 128 { 129 if (port->slave == NULL) 130 return NULL; 131 132 return bond_get_bond_by_slave(port->slave); 133 } 134 135 /** 136 * __get_first_agg - get the first aggregator in the bond 137 * @port: the port we're looking at 138 * 139 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 140 * found. 141 * The caller must hold RCU or RTNL lock. 142 */ 143 static inline struct aggregator *__get_first_agg(struct port *port) 144 { 145 struct bonding *bond = __get_bond_by_port(port); 146 struct slave *first_slave; 147 struct aggregator *agg; 148 149 /* If there's no bond for this port, or bond has no slaves */ 150 if (bond == NULL) 151 return NULL; 152 153 rcu_read_lock(); 154 first_slave = bond_first_slave_rcu(bond); 155 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 156 rcu_read_unlock(); 157 158 return agg; 159 } 160 161 /** 162 * __agg_has_partner - see if we have a partner 163 * @agg: the agregator we're looking at 164 * 165 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 166 * address for the partner). Return 0 if not. 167 */ 168 static inline int __agg_has_partner(struct aggregator *agg) 169 { 170 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 171 } 172 173 /** 174 * __disable_port - disable the port's slave 175 * @port: the port we're looking at 176 */ 177 static inline void __disable_port(struct port *port) 178 { 179 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 180 } 181 182 /** 183 * __enable_port - enable the port's slave, if it's up 184 * @port: the port we're looking at 185 */ 186 static inline void __enable_port(struct port *port) 187 { 188 struct slave *slave = port->slave; 189 190 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 191 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 192 } 193 194 /** 195 * __port_is_enabled - check if the port's slave is in active state 196 * @port: the port we're looking at 197 */ 198 static inline int __port_is_enabled(struct port *port) 199 { 200 return bond_is_active_slave(port->slave); 201 } 202 203 /** 204 * __get_agg_selection_mode - get the aggregator selection mode 205 * @port: the port we're looking at 206 * 207 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 208 */ 209 static inline u32 __get_agg_selection_mode(struct port *port) 210 { 211 struct bonding *bond = __get_bond_by_port(port); 212 213 if (bond == NULL) 214 return BOND_AD_STABLE; 215 216 return bond->params.ad_select; 217 } 218 219 /** 220 * __check_agg_selection_timer - check if the selection timer has expired 221 * @port: the port we're looking at 222 */ 223 static inline int __check_agg_selection_timer(struct port *port) 224 { 225 struct bonding *bond = __get_bond_by_port(port); 226 227 if (bond == NULL) 228 return 0; 229 230 return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0; 231 } 232 233 /** 234 * __get_link_speed - get a port's speed 235 * @port: the port we're looking at 236 * 237 * Return @port's speed in 802.3ad enum format. i.e. one of: 238 * 0, 239 * %AD_LINK_SPEED_10MBPS, 240 * %AD_LINK_SPEED_100MBPS, 241 * %AD_LINK_SPEED_1000MBPS, 242 * %AD_LINK_SPEED_2500MBPS, 243 * %AD_LINK_SPEED_5000MBPS, 244 * %AD_LINK_SPEED_10000MBPS 245 * %AD_LINK_SPEED_14000MBPS, 246 * %AD_LINK_SPEED_20000MBPS 247 * %AD_LINK_SPEED_25000MBPS 248 * %AD_LINK_SPEED_40000MBPS 249 * %AD_LINK_SPEED_50000MBPS 250 * %AD_LINK_SPEED_56000MBPS 251 * %AD_LINK_SPEED_100000MBPS 252 * %AD_LINK_SPEED_200000MBPS 253 * %AD_LINK_SPEED_400000MBPS 254 */ 255 static u16 __get_link_speed(struct port *port) 256 { 257 struct slave *slave = port->slave; 258 u16 speed; 259 260 /* this if covers only a special case: when the configuration starts 261 * with link down, it sets the speed to 0. 262 * This is done in spite of the fact that the e100 driver reports 0 263 * to be compatible with MVT in the future. 264 */ 265 if (slave->link != BOND_LINK_UP) 266 speed = 0; 267 else { 268 switch (slave->speed) { 269 case SPEED_10: 270 speed = AD_LINK_SPEED_10MBPS; 271 break; 272 273 case SPEED_100: 274 speed = AD_LINK_SPEED_100MBPS; 275 break; 276 277 case SPEED_1000: 278 speed = AD_LINK_SPEED_1000MBPS; 279 break; 280 281 case SPEED_2500: 282 speed = AD_LINK_SPEED_2500MBPS; 283 break; 284 285 case SPEED_5000: 286 speed = AD_LINK_SPEED_5000MBPS; 287 break; 288 289 case SPEED_10000: 290 speed = AD_LINK_SPEED_10000MBPS; 291 break; 292 293 case SPEED_14000: 294 speed = AD_LINK_SPEED_14000MBPS; 295 break; 296 297 case SPEED_20000: 298 speed = AD_LINK_SPEED_20000MBPS; 299 break; 300 301 case SPEED_25000: 302 speed = AD_LINK_SPEED_25000MBPS; 303 break; 304 305 case SPEED_40000: 306 speed = AD_LINK_SPEED_40000MBPS; 307 break; 308 309 case SPEED_50000: 310 speed = AD_LINK_SPEED_50000MBPS; 311 break; 312 313 case SPEED_56000: 314 speed = AD_LINK_SPEED_56000MBPS; 315 break; 316 317 case SPEED_100000: 318 speed = AD_LINK_SPEED_100000MBPS; 319 break; 320 321 case SPEED_200000: 322 speed = AD_LINK_SPEED_200000MBPS; 323 break; 324 325 case SPEED_400000: 326 speed = AD_LINK_SPEED_400000MBPS; 327 break; 328 329 default: 330 /* unknown speed value from ethtool. shouldn't happen */ 331 if (slave->speed != SPEED_UNKNOWN) 332 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n", 333 slave->bond->dev->name, 334 slave->dev->name, slave->speed, 335 port->actor_port_number); 336 speed = 0; 337 break; 338 } 339 } 340 341 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n", 342 port->actor_port_number, speed); 343 return speed; 344 } 345 346 /** 347 * __get_duplex - get a port's duplex 348 * @port: the port we're looking at 349 * 350 * Return @port's duplex in 802.3ad bitmask format. i.e.: 351 * 0x01 if in full duplex 352 * 0x00 otherwise 353 */ 354 static u8 __get_duplex(struct port *port) 355 { 356 struct slave *slave = port->slave; 357 u8 retval = 0x0; 358 359 /* handling a special case: when the configuration starts with 360 * link down, it sets the duplex to 0. 361 */ 362 if (slave->link == BOND_LINK_UP) { 363 switch (slave->duplex) { 364 case DUPLEX_FULL: 365 retval = 0x1; 366 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n", 367 port->actor_port_number); 368 break; 369 case DUPLEX_HALF: 370 default: 371 retval = 0x0; 372 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n", 373 port->actor_port_number); 374 break; 375 } 376 } 377 return retval; 378 } 379 380 static void __ad_actor_update_port(struct port *port) 381 { 382 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 383 384 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 385 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 386 } 387 388 /* Conversions */ 389 390 /** 391 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 392 * @timer_type: which timer to operate 393 * @par: timer parameter. see below 394 * 395 * If @timer_type is %current_while_timer, @par indicates long/short timer. 396 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 397 * %SLOW_PERIODIC_TIME. 398 */ 399 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 400 { 401 u16 retval = 0; /* to silence the compiler */ 402 403 switch (timer_type) { 404 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 405 if (par) 406 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 407 else 408 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 409 break; 410 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 411 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 412 break; 413 case AD_PERIODIC_TIMER: /* for periodic machine */ 414 retval = (par*ad_ticks_per_sec); /* long timeout */ 415 break; 416 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 417 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 418 break; 419 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 420 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 421 break; 422 } 423 424 return retval; 425 } 426 427 428 /* ================= ad_rx_machine helper functions ================== */ 429 430 /** 431 * __choose_matched - update a port's matched variable from a received lacpdu 432 * @lacpdu: the lacpdu we've received 433 * @port: the port we're looking at 434 * 435 * Update the value of the matched variable, using parameter values from a 436 * newly received lacpdu. Parameter values for the partner carried in the 437 * received PDU are compared with the corresponding operational parameter 438 * values for the actor. Matched is set to TRUE if all of these parameters 439 * match and the PDU parameter partner_state.aggregation has the same value as 440 * actor_oper_port_state.aggregation and lacp will actively maintain the link 441 * in the aggregation. Matched is also set to TRUE if the value of 442 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 443 * an individual link and lacp will actively maintain the link. Otherwise, 444 * matched is set to FALSE. LACP is considered to be actively maintaining the 445 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 446 * the actor's actor_oper_port_state.lacp_activity and the PDU's 447 * partner_state.lacp_activity variables are TRUE. 448 * 449 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 450 * used here to implement the language from 802.3ad 43.4.9 that requires 451 * recordPDU to "match" the LACPDU parameters to the stored values. 452 */ 453 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 454 { 455 /* check if all parameters are alike 456 * or this is individual link(aggregation == FALSE) 457 * then update the state machine Matched variable. 458 */ 459 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 460 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 461 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 462 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 463 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 464 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) || 465 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0) 466 ) { 467 port->sm_vars |= AD_PORT_MATCHED; 468 } else { 469 port->sm_vars &= ~AD_PORT_MATCHED; 470 } 471 } 472 473 /** 474 * __record_pdu - record parameters from a received lacpdu 475 * @lacpdu: the lacpdu we've received 476 * @port: the port we're looking at 477 * 478 * Record the parameter values for the Actor carried in a received lacpdu as 479 * the current partner operational parameter values and sets 480 * actor_oper_port_state.defaulted to FALSE. 481 */ 482 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 483 { 484 if (lacpdu && port) { 485 struct port_params *partner = &port->partner_oper; 486 487 __choose_matched(lacpdu, port); 488 /* record the new parameter values for the partner 489 * operational 490 */ 491 partner->port_number = ntohs(lacpdu->actor_port); 492 partner->port_priority = ntohs(lacpdu->actor_port_priority); 493 partner->system = lacpdu->actor_system; 494 partner->system_priority = ntohs(lacpdu->actor_system_priority); 495 partner->key = ntohs(lacpdu->actor_key); 496 partner->port_state = lacpdu->actor_state; 497 498 /* set actor_oper_port_state.defaulted to FALSE */ 499 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED; 500 501 /* set the partner sync. to on if the partner is sync, 502 * and the port is matched 503 */ 504 if ((port->sm_vars & AD_PORT_MATCHED) && 505 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) { 506 partner->port_state |= LACP_STATE_SYNCHRONIZATION; 507 slave_dbg(port->slave->bond->dev, port->slave->dev, 508 "partner sync=1\n"); 509 } else { 510 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION; 511 slave_dbg(port->slave->bond->dev, port->slave->dev, 512 "partner sync=0\n"); 513 } 514 } 515 } 516 517 /** 518 * __record_default - record default parameters 519 * @port: the port we're looking at 520 * 521 * This function records the default parameter values for the partner carried 522 * in the Partner Admin parameters as the current partner operational parameter 523 * values and sets actor_oper_port_state.defaulted to TRUE. 524 */ 525 static void __record_default(struct port *port) 526 { 527 if (port) { 528 /* record the partner admin parameters */ 529 memcpy(&port->partner_oper, &port->partner_admin, 530 sizeof(struct port_params)); 531 532 /* set actor_oper_port_state.defaulted to true */ 533 port->actor_oper_port_state |= LACP_STATE_DEFAULTED; 534 } 535 } 536 537 /** 538 * __update_selected - update a port's Selected variable from a received lacpdu 539 * @lacpdu: the lacpdu we've received 540 * @port: the port we're looking at 541 * 542 * Update the value of the selected variable, using parameter values from a 543 * newly received lacpdu. The parameter values for the Actor carried in the 544 * received PDU are compared with the corresponding operational parameter 545 * values for the ports partner. If one or more of the comparisons shows that 546 * the value(s) received in the PDU differ from the current operational values, 547 * then selected is set to FALSE and actor_oper_port_state.synchronization is 548 * set to out_of_sync. Otherwise, selected remains unchanged. 549 */ 550 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 551 { 552 if (lacpdu && port) { 553 const struct port_params *partner = &port->partner_oper; 554 555 /* check if any parameter is different then 556 * update the state machine selected variable. 557 */ 558 if (ntohs(lacpdu->actor_port) != partner->port_number || 559 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 560 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 561 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 562 ntohs(lacpdu->actor_key) != partner->key || 563 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) { 564 port->sm_vars &= ~AD_PORT_SELECTED; 565 } 566 } 567 } 568 569 /** 570 * __update_default_selected - update a port's Selected variable from Partner 571 * @port: the port we're looking at 572 * 573 * This function updates the value of the selected variable, using the partner 574 * administrative parameter values. The administrative values are compared with 575 * the corresponding operational parameter values for the partner. If one or 576 * more of the comparisons shows that the administrative value(s) differ from 577 * the current operational values, then Selected is set to FALSE and 578 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 579 * Selected remains unchanged. 580 */ 581 static void __update_default_selected(struct port *port) 582 { 583 if (port) { 584 const struct port_params *admin = &port->partner_admin; 585 const struct port_params *oper = &port->partner_oper; 586 587 /* check if any parameter is different then 588 * update the state machine selected variable. 589 */ 590 if (admin->port_number != oper->port_number || 591 admin->port_priority != oper->port_priority || 592 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 593 admin->system_priority != oper->system_priority || 594 admin->key != oper->key || 595 (admin->port_state & LACP_STATE_AGGREGATION) 596 != (oper->port_state & LACP_STATE_AGGREGATION)) { 597 port->sm_vars &= ~AD_PORT_SELECTED; 598 } 599 } 600 } 601 602 /** 603 * __update_ntt - update a port's ntt variable from a received lacpdu 604 * @lacpdu: the lacpdu we've received 605 * @port: the port we're looking at 606 * 607 * Updates the value of the ntt variable, using parameter values from a newly 608 * received lacpdu. The parameter values for the partner carried in the 609 * received PDU are compared with the corresponding operational parameter 610 * values for the Actor. If one or more of the comparisons shows that the 611 * value(s) received in the PDU differ from the current operational values, 612 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 613 */ 614 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 615 { 616 /* validate lacpdu and port */ 617 if (lacpdu && port) { 618 /* check if any parameter is different then 619 * update the port->ntt. 620 */ 621 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 622 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 623 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 624 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 625 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 626 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) || 627 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) || 628 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) || 629 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION)) 630 ) { 631 port->ntt = true; 632 } 633 } 634 } 635 636 /** 637 * __agg_ports_are_ready - check if all ports in an aggregator are ready 638 * @aggregator: the aggregator we're looking at 639 * 640 */ 641 static int __agg_ports_are_ready(struct aggregator *aggregator) 642 { 643 struct port *port; 644 int retval = 1; 645 646 if (aggregator) { 647 /* scan all ports in this aggregator to verfy if they are 648 * all ready. 649 */ 650 for (port = aggregator->lag_ports; 651 port; 652 port = port->next_port_in_aggregator) { 653 if (!(port->sm_vars & AD_PORT_READY_N)) { 654 retval = 0; 655 break; 656 } 657 } 658 } 659 660 return retval; 661 } 662 663 /** 664 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 665 * @aggregator: the aggregator we're looking at 666 * @val: Should the ports' ready bit be set on or off 667 * 668 */ 669 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 670 { 671 struct port *port; 672 673 for (port = aggregator->lag_ports; port; 674 port = port->next_port_in_aggregator) { 675 if (val) 676 port->sm_vars |= AD_PORT_READY; 677 else 678 port->sm_vars &= ~AD_PORT_READY; 679 } 680 } 681 682 static int __agg_active_ports(struct aggregator *agg) 683 { 684 struct port *port; 685 int active = 0; 686 687 for (port = agg->lag_ports; port; 688 port = port->next_port_in_aggregator) { 689 if (port->is_enabled) 690 active++; 691 } 692 693 return active; 694 } 695 696 /** 697 * __get_agg_bandwidth - get the total bandwidth of an aggregator 698 * @aggregator: the aggregator we're looking at 699 * 700 */ 701 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 702 { 703 int nports = __agg_active_ports(aggregator); 704 u32 bandwidth = 0; 705 706 if (nports) { 707 switch (__get_link_speed(aggregator->lag_ports)) { 708 case AD_LINK_SPEED_1MBPS: 709 bandwidth = nports; 710 break; 711 case AD_LINK_SPEED_10MBPS: 712 bandwidth = nports * 10; 713 break; 714 case AD_LINK_SPEED_100MBPS: 715 bandwidth = nports * 100; 716 break; 717 case AD_LINK_SPEED_1000MBPS: 718 bandwidth = nports * 1000; 719 break; 720 case AD_LINK_SPEED_2500MBPS: 721 bandwidth = nports * 2500; 722 break; 723 case AD_LINK_SPEED_5000MBPS: 724 bandwidth = nports * 5000; 725 break; 726 case AD_LINK_SPEED_10000MBPS: 727 bandwidth = nports * 10000; 728 break; 729 case AD_LINK_SPEED_14000MBPS: 730 bandwidth = nports * 14000; 731 break; 732 case AD_LINK_SPEED_20000MBPS: 733 bandwidth = nports * 20000; 734 break; 735 case AD_LINK_SPEED_25000MBPS: 736 bandwidth = nports * 25000; 737 break; 738 case AD_LINK_SPEED_40000MBPS: 739 bandwidth = nports * 40000; 740 break; 741 case AD_LINK_SPEED_50000MBPS: 742 bandwidth = nports * 50000; 743 break; 744 case AD_LINK_SPEED_56000MBPS: 745 bandwidth = nports * 56000; 746 break; 747 case AD_LINK_SPEED_100000MBPS: 748 bandwidth = nports * 100000; 749 break; 750 case AD_LINK_SPEED_200000MBPS: 751 bandwidth = nports * 200000; 752 break; 753 case AD_LINK_SPEED_400000MBPS: 754 bandwidth = nports * 400000; 755 break; 756 default: 757 bandwidth = 0; /* to silence the compiler */ 758 } 759 } 760 return bandwidth; 761 } 762 763 /** 764 * __get_active_agg - get the current active aggregator 765 * @aggregator: the aggregator we're looking at 766 * 767 * Caller must hold RCU lock. 768 */ 769 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 770 { 771 struct bonding *bond = aggregator->slave->bond; 772 struct list_head *iter; 773 struct slave *slave; 774 775 bond_for_each_slave_rcu(bond, slave, iter) 776 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 777 return &(SLAVE_AD_INFO(slave)->aggregator); 778 779 return NULL; 780 } 781 782 /** 783 * __update_lacpdu_from_port - update a port's lacpdu fields 784 * @port: the port we're looking at 785 */ 786 static inline void __update_lacpdu_from_port(struct port *port) 787 { 788 struct lacpdu *lacpdu = &port->lacpdu; 789 const struct port_params *partner = &port->partner_oper; 790 791 /* update current actual Actor parameters 792 * lacpdu->subtype initialized 793 * lacpdu->version_number initialized 794 * lacpdu->tlv_type_actor_info initialized 795 * lacpdu->actor_information_length initialized 796 */ 797 798 lacpdu->actor_system_priority = htons(port->actor_system_priority); 799 lacpdu->actor_system = port->actor_system; 800 lacpdu->actor_key = htons(port->actor_oper_port_key); 801 lacpdu->actor_port_priority = htons(port->actor_port_priority); 802 lacpdu->actor_port = htons(port->actor_port_number); 803 lacpdu->actor_state = port->actor_oper_port_state; 804 slave_dbg(port->slave->bond->dev, port->slave->dev, 805 "update lacpdu: actor port state %x\n", 806 port->actor_oper_port_state); 807 808 /* lacpdu->reserved_3_1 initialized 809 * lacpdu->tlv_type_partner_info initialized 810 * lacpdu->partner_information_length initialized 811 */ 812 813 lacpdu->partner_system_priority = htons(partner->system_priority); 814 lacpdu->partner_system = partner->system; 815 lacpdu->partner_key = htons(partner->key); 816 lacpdu->partner_port_priority = htons(partner->port_priority); 817 lacpdu->partner_port = htons(partner->port_number); 818 lacpdu->partner_state = partner->port_state; 819 820 /* lacpdu->reserved_3_2 initialized 821 * lacpdu->tlv_type_collector_info initialized 822 * lacpdu->collector_information_length initialized 823 * collector_max_delay initialized 824 * reserved_12[12] initialized 825 * tlv_type_terminator initialized 826 * terminator_length initialized 827 * reserved_50[50] initialized 828 */ 829 } 830 831 /* ================= main 802.3ad protocol code ========================= */ 832 833 /** 834 * ad_lacpdu_send - send out a lacpdu packet on a given port 835 * @port: the port we're looking at 836 * 837 * Returns: 0 on success 838 * < 0 on error 839 */ 840 static int ad_lacpdu_send(struct port *port) 841 { 842 struct slave *slave = port->slave; 843 struct sk_buff *skb; 844 struct lacpdu_header *lacpdu_header; 845 int length = sizeof(struct lacpdu_header); 846 847 skb = dev_alloc_skb(length); 848 if (!skb) 849 return -ENOMEM; 850 851 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx); 852 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx); 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 switch (marker->tlv_type) { 896 case AD_MARKER_INFORMATION_SUBTYPE: 897 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx); 898 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx); 899 break; 900 case AD_MARKER_RESPONSE_SUBTYPE: 901 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx); 902 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx); 903 break; 904 } 905 906 skb_reserve(skb, 16); 907 908 skb->dev = slave->dev; 909 skb_reset_mac_header(skb); 910 skb->network_header = skb->mac_header + ETH_HLEN; 911 skb->protocol = PKT_TYPE_LACPDU; 912 913 marker_header = skb_put(skb, length); 914 915 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 916 /* Note: source address is set to be the member's PERMANENT address, 917 * because we use it to identify loopback MARKERs in receive. 918 */ 919 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 920 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 921 922 marker_header->marker = *marker; 923 924 dev_queue_xmit(skb); 925 926 return 0; 927 } 928 929 /** 930 * ad_mux_machine - handle a port's mux state machine 931 * @port: the port we're looking at 932 * @update_slave_arr: Does slave array need update? 933 */ 934 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 935 { 936 mux_states_t last_state; 937 938 /* keep current State Machine state to compare later if it was 939 * changed 940 */ 941 last_state = port->sm_mux_state; 942 943 if (port->sm_vars & AD_PORT_BEGIN) { 944 port->sm_mux_state = AD_MUX_DETACHED; 945 } else { 946 switch (port->sm_mux_state) { 947 case AD_MUX_DETACHED: 948 if ((port->sm_vars & AD_PORT_SELECTED) 949 || (port->sm_vars & AD_PORT_STANDBY)) 950 /* if SELECTED or STANDBY */ 951 port->sm_mux_state = AD_MUX_WAITING; 952 break; 953 case AD_MUX_WAITING: 954 /* if SELECTED == FALSE return to DETACH state */ 955 if (!(port->sm_vars & AD_PORT_SELECTED)) { 956 port->sm_vars &= ~AD_PORT_READY_N; 957 /* in order to withhold the Selection Logic to 958 * check all ports READY_N value every callback 959 * cycle to update ready variable, we check 960 * READY_N and update READY here 961 */ 962 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 963 port->sm_mux_state = AD_MUX_DETACHED; 964 break; 965 } 966 967 /* check if the wait_while_timer expired */ 968 if (port->sm_mux_timer_counter 969 && !(--port->sm_mux_timer_counter)) 970 port->sm_vars |= AD_PORT_READY_N; 971 972 /* in order to withhold the selection logic to check 973 * all ports READY_N value every callback cycle to 974 * update ready variable, we check READY_N and update 975 * READY here 976 */ 977 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 978 979 /* if the wait_while_timer expired, and the port is 980 * in READY state, move to ATTACHED state 981 */ 982 if ((port->sm_vars & AD_PORT_READY) 983 && !port->sm_mux_timer_counter) 984 port->sm_mux_state = AD_MUX_ATTACHED; 985 break; 986 case AD_MUX_ATTACHED: 987 /* check also if agg_select_timer expired (so the 988 * edable port will take place only after this timer) 989 */ 990 if ((port->sm_vars & AD_PORT_SELECTED) && 991 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) && 992 !__check_agg_selection_timer(port)) { 993 if (port->aggregator->is_active) 994 port->sm_mux_state = 995 AD_MUX_COLLECTING_DISTRIBUTING; 996 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 997 (port->sm_vars & AD_PORT_STANDBY)) { 998 /* if UNSELECTED or STANDBY */ 999 port->sm_vars &= ~AD_PORT_READY_N; 1000 /* in order to withhold the selection logic to 1001 * check all ports READY_N value every callback 1002 * cycle to update ready variable, we check 1003 * READY_N and update READY here 1004 */ 1005 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1006 port->sm_mux_state = AD_MUX_DETACHED; 1007 } else if (port->aggregator->is_active) { 1008 port->actor_oper_port_state |= 1009 LACP_STATE_SYNCHRONIZATION; 1010 } 1011 break; 1012 case AD_MUX_COLLECTING_DISTRIBUTING: 1013 if (!(port->sm_vars & AD_PORT_SELECTED) || 1014 (port->sm_vars & AD_PORT_STANDBY) || 1015 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) || 1016 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) { 1017 port->sm_mux_state = AD_MUX_ATTACHED; 1018 } else { 1019 /* if port state hasn't changed make 1020 * sure that a collecting distributing 1021 * port in an active aggregator is enabled 1022 */ 1023 if (port->aggregator && 1024 port->aggregator->is_active && 1025 !__port_is_enabled(port)) { 1026 __enable_port(port); 1027 *update_slave_arr = true; 1028 } 1029 } 1030 break; 1031 default: 1032 break; 1033 } 1034 } 1035 1036 /* check if the state machine was changed */ 1037 if (port->sm_mux_state != last_state) { 1038 slave_dbg(port->slave->bond->dev, port->slave->dev, 1039 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 1040 port->actor_port_number, 1041 last_state, 1042 port->sm_mux_state); 1043 switch (port->sm_mux_state) { 1044 case AD_MUX_DETACHED: 1045 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1046 ad_disable_collecting_distributing(port, 1047 update_slave_arr); 1048 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1049 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1050 port->ntt = true; 1051 break; 1052 case AD_MUX_WAITING: 1053 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1054 break; 1055 case AD_MUX_ATTACHED: 1056 if (port->aggregator->is_active) 1057 port->actor_oper_port_state |= 1058 LACP_STATE_SYNCHRONIZATION; 1059 else 1060 port->actor_oper_port_state &= 1061 ~LACP_STATE_SYNCHRONIZATION; 1062 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1063 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1064 ad_disable_collecting_distributing(port, 1065 update_slave_arr); 1066 port->ntt = true; 1067 break; 1068 case AD_MUX_COLLECTING_DISTRIBUTING: 1069 port->actor_oper_port_state |= LACP_STATE_COLLECTING; 1070 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING; 1071 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; 1072 ad_enable_collecting_distributing(port, 1073 update_slave_arr); 1074 port->ntt = true; 1075 break; 1076 default: 1077 break; 1078 } 1079 } 1080 } 1081 1082 /** 1083 * ad_rx_machine - handle a port's rx State Machine 1084 * @lacpdu: the lacpdu we've received 1085 * @port: the port we're looking at 1086 * 1087 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1088 * CURRENT. If timer expired set the state machine in the proper state. 1089 * In other cases, this function checks if we need to switch to other state. 1090 */ 1091 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1092 { 1093 rx_states_t last_state; 1094 1095 /* keep current State Machine state to compare later if it was 1096 * changed 1097 */ 1098 last_state = port->sm_rx_state; 1099 1100 if (lacpdu) { 1101 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx); 1102 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx); 1103 } 1104 /* check if state machine should change state */ 1105 1106 /* first, check if port was reinitialized */ 1107 if (port->sm_vars & AD_PORT_BEGIN) { 1108 port->sm_rx_state = AD_RX_INITIALIZE; 1109 port->sm_vars |= AD_PORT_CHURNED; 1110 /* check if port is not enabled */ 1111 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1112 port->sm_rx_state = AD_RX_PORT_DISABLED; 1113 /* check if new lacpdu arrived */ 1114 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1115 (port->sm_rx_state == AD_RX_DEFAULTED) || 1116 (port->sm_rx_state == AD_RX_CURRENT))) { 1117 if (port->sm_rx_state != AD_RX_CURRENT) 1118 port->sm_vars |= AD_PORT_CHURNED; 1119 port->sm_rx_timer_counter = 0; 1120 port->sm_rx_state = AD_RX_CURRENT; 1121 } else { 1122 /* if timer is on, and if it is expired */ 1123 if (port->sm_rx_timer_counter && 1124 !(--port->sm_rx_timer_counter)) { 1125 switch (port->sm_rx_state) { 1126 case AD_RX_EXPIRED: 1127 port->sm_rx_state = AD_RX_DEFAULTED; 1128 break; 1129 case AD_RX_CURRENT: 1130 port->sm_rx_state = AD_RX_EXPIRED; 1131 break; 1132 default: 1133 break; 1134 } 1135 } else { 1136 /* if no lacpdu arrived and no timer is on */ 1137 switch (port->sm_rx_state) { 1138 case AD_RX_PORT_DISABLED: 1139 if (port->is_enabled && 1140 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1141 port->sm_rx_state = AD_RX_EXPIRED; 1142 else if (port->is_enabled 1143 && ((port->sm_vars 1144 & AD_PORT_LACP_ENABLED) == 0)) 1145 port->sm_rx_state = AD_RX_LACP_DISABLED; 1146 break; 1147 default: 1148 break; 1149 1150 } 1151 } 1152 } 1153 1154 /* check if the State machine was changed or new lacpdu arrived */ 1155 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1156 slave_dbg(port->slave->bond->dev, port->slave->dev, 1157 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1158 port->actor_port_number, 1159 last_state, 1160 port->sm_rx_state); 1161 switch (port->sm_rx_state) { 1162 case AD_RX_INITIALIZE: 1163 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1164 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1165 else 1166 port->sm_vars |= AD_PORT_LACP_ENABLED; 1167 port->sm_vars &= ~AD_PORT_SELECTED; 1168 __record_default(port); 1169 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1170 port->sm_rx_state = AD_RX_PORT_DISABLED; 1171 1172 fallthrough; 1173 case AD_RX_PORT_DISABLED: 1174 port->sm_vars &= ~AD_PORT_MATCHED; 1175 break; 1176 case AD_RX_LACP_DISABLED: 1177 port->sm_vars &= ~AD_PORT_SELECTED; 1178 __record_default(port); 1179 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION; 1180 port->sm_vars |= AD_PORT_MATCHED; 1181 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1182 break; 1183 case AD_RX_EXPIRED: 1184 /* Reset of the Synchronization flag (Standard 43.4.12) 1185 * This reset cause to disable this port in the 1186 * COLLECTING_DISTRIBUTING state of the mux machine in 1187 * case of EXPIRED even if LINK_DOWN didn't arrive for 1188 * the port. 1189 */ 1190 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION; 1191 port->sm_vars &= ~AD_PORT_MATCHED; 1192 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT; 1193 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY; 1194 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1195 port->actor_oper_port_state |= LACP_STATE_EXPIRED; 1196 port->sm_vars |= AD_PORT_CHURNED; 1197 break; 1198 case AD_RX_DEFAULTED: 1199 __update_default_selected(port); 1200 __record_default(port); 1201 port->sm_vars |= AD_PORT_MATCHED; 1202 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1203 break; 1204 case AD_RX_CURRENT: 1205 /* detect loopback situation */ 1206 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1207 &(port->actor_system))) { 1208 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n" 1209 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n"); 1210 return; 1211 } 1212 __update_selected(lacpdu, port); 1213 __update_ntt(lacpdu, port); 1214 __record_pdu(lacpdu, port); 1215 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)); 1216 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1217 break; 1218 default: 1219 break; 1220 } 1221 } 1222 } 1223 1224 /** 1225 * ad_churn_machine - handle port churn's state machine 1226 * @port: the port we're looking at 1227 * 1228 */ 1229 static void ad_churn_machine(struct port *port) 1230 { 1231 if (port->sm_vars & AD_PORT_CHURNED) { 1232 port->sm_vars &= ~AD_PORT_CHURNED; 1233 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1234 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1235 port->sm_churn_actor_timer_counter = 1236 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1237 port->sm_churn_partner_timer_counter = 1238 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1239 return; 1240 } 1241 if (port->sm_churn_actor_timer_counter && 1242 !(--port->sm_churn_actor_timer_counter) && 1243 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1244 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) { 1245 port->sm_churn_actor_state = AD_NO_CHURN; 1246 } else { 1247 port->churn_actor_count++; 1248 port->sm_churn_actor_state = AD_CHURN; 1249 } 1250 } 1251 if (port->sm_churn_partner_timer_counter && 1252 !(--port->sm_churn_partner_timer_counter) && 1253 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1254 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) { 1255 port->sm_churn_partner_state = AD_NO_CHURN; 1256 } else { 1257 port->churn_partner_count++; 1258 port->sm_churn_partner_state = AD_CHURN; 1259 } 1260 } 1261 } 1262 1263 /** 1264 * ad_tx_machine - handle a port's tx state machine 1265 * @port: the port we're looking at 1266 */ 1267 static void ad_tx_machine(struct port *port) 1268 { 1269 /* check if tx timer expired, to verify that we do not send more than 1270 * 3 packets per second 1271 */ 1272 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1273 /* check if there is something to send */ 1274 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1275 __update_lacpdu_from_port(port); 1276 1277 if (ad_lacpdu_send(port) >= 0) { 1278 slave_dbg(port->slave->bond->dev, 1279 port->slave->dev, 1280 "Sent LACPDU on port %d\n", 1281 port->actor_port_number); 1282 1283 /* mark ntt as false, so it will not be sent 1284 * again until demanded 1285 */ 1286 port->ntt = false; 1287 } 1288 } 1289 /* restart tx timer(to verify that we will not exceed 1290 * AD_MAX_TX_IN_SECOND 1291 */ 1292 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1293 } 1294 } 1295 1296 /** 1297 * ad_periodic_machine - handle a port's periodic state machine 1298 * @port: the port we're looking at 1299 * @bond_params: bond parameters we will use 1300 * 1301 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1302 */ 1303 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params) 1304 { 1305 periodic_states_t last_state; 1306 1307 /* keep current state machine state to compare later if it was changed */ 1308 last_state = port->sm_periodic_state; 1309 1310 /* check if port was reinitialized */ 1311 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1312 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) || 1313 !bond_params->lacp_active) { 1314 port->sm_periodic_state = AD_NO_PERIODIC; 1315 } 1316 /* check if state machine should change state */ 1317 else if (port->sm_periodic_timer_counter) { 1318 /* check if periodic state machine expired */ 1319 if (!(--port->sm_periodic_timer_counter)) { 1320 /* if expired then do tx */ 1321 port->sm_periodic_state = AD_PERIODIC_TX; 1322 } else { 1323 /* If not expired, check if there is some new timeout 1324 * parameter from the partner state 1325 */ 1326 switch (port->sm_periodic_state) { 1327 case AD_FAST_PERIODIC: 1328 if (!(port->partner_oper.port_state 1329 & LACP_STATE_LACP_TIMEOUT)) 1330 port->sm_periodic_state = AD_SLOW_PERIODIC; 1331 break; 1332 case AD_SLOW_PERIODIC: 1333 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) { 1334 port->sm_periodic_timer_counter = 0; 1335 port->sm_periodic_state = AD_PERIODIC_TX; 1336 } 1337 break; 1338 default: 1339 break; 1340 } 1341 } 1342 } else { 1343 switch (port->sm_periodic_state) { 1344 case AD_NO_PERIODIC: 1345 port->sm_periodic_state = AD_FAST_PERIODIC; 1346 break; 1347 case AD_PERIODIC_TX: 1348 if (!(port->partner_oper.port_state & 1349 LACP_STATE_LACP_TIMEOUT)) 1350 port->sm_periodic_state = AD_SLOW_PERIODIC; 1351 else 1352 port->sm_periodic_state = AD_FAST_PERIODIC; 1353 break; 1354 default: 1355 break; 1356 } 1357 } 1358 1359 /* check if the state machine was changed */ 1360 if (port->sm_periodic_state != last_state) { 1361 slave_dbg(port->slave->bond->dev, port->slave->dev, 1362 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1363 port->actor_port_number, last_state, 1364 port->sm_periodic_state); 1365 switch (port->sm_periodic_state) { 1366 case AD_NO_PERIODIC: 1367 port->sm_periodic_timer_counter = 0; 1368 break; 1369 case AD_FAST_PERIODIC: 1370 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1371 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1372 break; 1373 case AD_SLOW_PERIODIC: 1374 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1375 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1376 break; 1377 case AD_PERIODIC_TX: 1378 port->ntt = true; 1379 break; 1380 default: 1381 break; 1382 } 1383 } 1384 } 1385 1386 /** 1387 * ad_port_selection_logic - select aggregation groups 1388 * @port: the port we're looking at 1389 * @update_slave_arr: Does slave array need update? 1390 * 1391 * Select aggregation groups, and assign each port for it's aggregetor. The 1392 * selection logic is called in the inititalization (after all the handshkes), 1393 * and after every lacpdu receive (if selected is off). 1394 */ 1395 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1396 { 1397 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1398 struct port *last_port = NULL, *curr_port; 1399 struct list_head *iter; 1400 struct bonding *bond; 1401 struct slave *slave; 1402 int found = 0; 1403 1404 /* if the port is already Selected, do nothing */ 1405 if (port->sm_vars & AD_PORT_SELECTED) 1406 return; 1407 1408 bond = __get_bond_by_port(port); 1409 1410 /* if the port is connected to other aggregator, detach it */ 1411 if (port->aggregator) { 1412 /* detach the port from its former aggregator */ 1413 temp_aggregator = port->aggregator; 1414 for (curr_port = temp_aggregator->lag_ports; curr_port; 1415 last_port = curr_port, 1416 curr_port = curr_port->next_port_in_aggregator) { 1417 if (curr_port == port) { 1418 temp_aggregator->num_of_ports--; 1419 /* if it is the first port attached to the 1420 * aggregator 1421 */ 1422 if (!last_port) { 1423 temp_aggregator->lag_ports = 1424 port->next_port_in_aggregator; 1425 } else { 1426 /* not the first port attached to the 1427 * aggregator 1428 */ 1429 last_port->next_port_in_aggregator = 1430 port->next_port_in_aggregator; 1431 } 1432 1433 /* clear the port's relations to this 1434 * aggregator 1435 */ 1436 port->aggregator = NULL; 1437 port->next_port_in_aggregator = NULL; 1438 port->actor_port_aggregator_identifier = 0; 1439 1440 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n", 1441 port->actor_port_number, 1442 temp_aggregator->aggregator_identifier); 1443 /* if the aggregator is empty, clear its 1444 * parameters, and set it ready to be attached 1445 */ 1446 if (!temp_aggregator->lag_ports) 1447 ad_clear_agg(temp_aggregator); 1448 break; 1449 } 1450 } 1451 if (!curr_port) { 1452 /* meaning: the port was related to an aggregator 1453 * but was not on the aggregator port list 1454 */ 1455 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n", 1456 port->slave->bond->dev->name, 1457 port->slave->dev->name, 1458 port->actor_port_number, 1459 port->aggregator->aggregator_identifier); 1460 } 1461 } 1462 /* search on all aggregators for a suitable aggregator for this port */ 1463 bond_for_each_slave(bond, slave, iter) { 1464 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1465 1466 /* keep a free aggregator for later use(if needed) */ 1467 if (!aggregator->lag_ports) { 1468 if (!free_aggregator) 1469 free_aggregator = aggregator; 1470 continue; 1471 } 1472 /* check if current aggregator suits us */ 1473 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1474 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1475 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1476 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1477 ) && 1478 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1479 !aggregator->is_individual) /* but is not individual OR */ 1480 ) 1481 ) { 1482 /* attach to the founded aggregator */ 1483 port->aggregator = aggregator; 1484 port->actor_port_aggregator_identifier = 1485 port->aggregator->aggregator_identifier; 1486 port->next_port_in_aggregator = aggregator->lag_ports; 1487 port->aggregator->num_of_ports++; 1488 aggregator->lag_ports = port; 1489 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n", 1490 port->actor_port_number, 1491 port->aggregator->aggregator_identifier); 1492 1493 /* mark this port as selected */ 1494 port->sm_vars |= AD_PORT_SELECTED; 1495 found = 1; 1496 break; 1497 } 1498 } 1499 1500 /* the port couldn't find an aggregator - attach it to a new 1501 * aggregator 1502 */ 1503 if (!found) { 1504 if (free_aggregator) { 1505 /* assign port a new aggregator */ 1506 port->aggregator = free_aggregator; 1507 port->actor_port_aggregator_identifier = 1508 port->aggregator->aggregator_identifier; 1509 1510 /* update the new aggregator's parameters 1511 * if port was responsed from the end-user 1512 */ 1513 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1514 /* if port is full duplex */ 1515 port->aggregator->is_individual = false; 1516 else 1517 port->aggregator->is_individual = true; 1518 1519 port->aggregator->actor_admin_aggregator_key = 1520 port->actor_admin_port_key; 1521 port->aggregator->actor_oper_aggregator_key = 1522 port->actor_oper_port_key; 1523 port->aggregator->partner_system = 1524 port->partner_oper.system; 1525 port->aggregator->partner_system_priority = 1526 port->partner_oper.system_priority; 1527 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1528 port->aggregator->receive_state = 1; 1529 port->aggregator->transmit_state = 1; 1530 port->aggregator->lag_ports = port; 1531 port->aggregator->num_of_ports++; 1532 1533 /* mark this port as selected */ 1534 port->sm_vars |= AD_PORT_SELECTED; 1535 1536 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n", 1537 port->actor_port_number, 1538 port->aggregator->aggregator_identifier); 1539 } else { 1540 slave_err(bond->dev, port->slave->dev, 1541 "Port %d did not find a suitable aggregator\n", 1542 port->actor_port_number); 1543 } 1544 } 1545 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1546 * in all aggregator's ports, else set ready=FALSE in all 1547 * aggregator's ports 1548 */ 1549 __set_agg_ports_ready(port->aggregator, 1550 __agg_ports_are_ready(port->aggregator)); 1551 1552 aggregator = __get_first_agg(port); 1553 ad_agg_selection_logic(aggregator, update_slave_arr); 1554 1555 if (!port->aggregator->is_active) 1556 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1557 } 1558 1559 /* Decide if "agg" is a better choice for the new active aggregator that 1560 * the current best, according to the ad_select policy. 1561 */ 1562 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1563 struct aggregator *curr) 1564 { 1565 /* 0. If no best, select current. 1566 * 1567 * 1. If the current agg is not individual, and the best is 1568 * individual, select current. 1569 * 1570 * 2. If current agg is individual and the best is not, keep best. 1571 * 1572 * 3. Therefore, current and best are both individual or both not 1573 * individual, so: 1574 * 1575 * 3a. If current agg partner replied, and best agg partner did not, 1576 * select current. 1577 * 1578 * 3b. If current agg partner did not reply and best agg partner 1579 * did reply, keep best. 1580 * 1581 * 4. Therefore, current and best both have partner replies or 1582 * both do not, so perform selection policy: 1583 * 1584 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1585 * select by bandwidth. 1586 * 1587 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1588 */ 1589 if (!best) 1590 return curr; 1591 1592 if (!curr->is_individual && best->is_individual) 1593 return curr; 1594 1595 if (curr->is_individual && !best->is_individual) 1596 return best; 1597 1598 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1599 return curr; 1600 1601 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1602 return best; 1603 1604 switch (__get_agg_selection_mode(curr->lag_ports)) { 1605 case BOND_AD_COUNT: 1606 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1607 return curr; 1608 1609 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1610 return best; 1611 1612 fallthrough; 1613 case BOND_AD_STABLE: 1614 case BOND_AD_BANDWIDTH: 1615 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1616 return curr; 1617 1618 break; 1619 1620 default: 1621 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n", 1622 curr->slave->bond->dev->name, 1623 curr->slave->dev->name, 1624 __get_agg_selection_mode(curr->lag_ports)); 1625 break; 1626 } 1627 1628 return best; 1629 } 1630 1631 static int agg_device_up(const struct aggregator *agg) 1632 { 1633 struct port *port = agg->lag_ports; 1634 1635 if (!port) 1636 return 0; 1637 1638 for (port = agg->lag_ports; port; 1639 port = port->next_port_in_aggregator) { 1640 if (netif_running(port->slave->dev) && 1641 netif_carrier_ok(port->slave->dev)) 1642 return 1; 1643 } 1644 1645 return 0; 1646 } 1647 1648 /** 1649 * ad_agg_selection_logic - select an aggregation group for a team 1650 * @agg: the aggregator we're looking at 1651 * @update_slave_arr: Does slave array need update? 1652 * 1653 * It is assumed that only one aggregator may be selected for a team. 1654 * 1655 * The logic of this function is to select the aggregator according to 1656 * the ad_select policy: 1657 * 1658 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1659 * it, and to reselect the active aggregator only if the previous 1660 * aggregator has no more ports related to it. 1661 * 1662 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1663 * bandwidth, and reselect whenever a link state change takes place or the 1664 * set of slaves in the bond changes. 1665 * 1666 * BOND_AD_COUNT: select the aggregator with largest number of ports 1667 * (slaves), and reselect whenever a link state change takes place or the 1668 * set of slaves in the bond changes. 1669 * 1670 * FIXME: this function MUST be called with the first agg in the bond, or 1671 * __get_active_agg() won't work correctly. This function should be better 1672 * called with the bond itself, and retrieve the first agg from it. 1673 */ 1674 static void ad_agg_selection_logic(struct aggregator *agg, 1675 bool *update_slave_arr) 1676 { 1677 struct aggregator *best, *active, *origin; 1678 struct bonding *bond = agg->slave->bond; 1679 struct list_head *iter; 1680 struct slave *slave; 1681 struct port *port; 1682 1683 rcu_read_lock(); 1684 origin = agg; 1685 active = __get_active_agg(agg); 1686 best = (active && agg_device_up(active)) ? active : NULL; 1687 1688 bond_for_each_slave_rcu(bond, slave, iter) { 1689 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1690 1691 agg->is_active = 0; 1692 1693 if (__agg_active_ports(agg) && agg_device_up(agg)) 1694 best = ad_agg_selection_test(best, agg); 1695 } 1696 1697 if (best && 1698 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1699 /* For the STABLE policy, don't replace the old active 1700 * aggregator if it's still active (it has an answering 1701 * partner) or if both the best and active don't have an 1702 * answering partner. 1703 */ 1704 if (active && active->lag_ports && 1705 __agg_active_ports(active) && 1706 (__agg_has_partner(active) || 1707 (!__agg_has_partner(active) && 1708 !__agg_has_partner(best)))) { 1709 if (!(!active->actor_oper_aggregator_key && 1710 best->actor_oper_aggregator_key)) { 1711 best = NULL; 1712 active->is_active = 1; 1713 } 1714 } 1715 } 1716 1717 if (best && (best == active)) { 1718 best = NULL; 1719 active->is_active = 1; 1720 } 1721 1722 /* if there is new best aggregator, activate it */ 1723 if (best) { 1724 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1725 best->slave ? best->slave->dev->name : "NULL", 1726 best->aggregator_identifier, best->num_of_ports, 1727 best->actor_oper_aggregator_key, 1728 best->partner_oper_aggregator_key, 1729 best->is_individual, best->is_active); 1730 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n", 1731 best->slave ? best->slave->dev->name : "NULL", 1732 best->lag_ports, best->slave); 1733 1734 bond_for_each_slave_rcu(bond, slave, iter) { 1735 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1736 1737 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1738 agg->aggregator_identifier, agg->num_of_ports, 1739 agg->actor_oper_aggregator_key, 1740 agg->partner_oper_aggregator_key, 1741 agg->is_individual, agg->is_active); 1742 } 1743 1744 /* check if any partner replies */ 1745 if (best->is_individual) 1746 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1747 bond->dev->name); 1748 1749 best->is_active = 1; 1750 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n", 1751 best->slave ? best->slave->dev->name : "NULL", 1752 best->aggregator_identifier); 1753 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1754 best->slave ? best->slave->dev->name : "NULL", 1755 best->aggregator_identifier, best->num_of_ports, 1756 best->actor_oper_aggregator_key, 1757 best->partner_oper_aggregator_key, 1758 best->is_individual, best->is_active); 1759 1760 /* disable the ports that were related to the former 1761 * active_aggregator 1762 */ 1763 if (active) { 1764 for (port = active->lag_ports; port; 1765 port = port->next_port_in_aggregator) { 1766 __disable_port(port); 1767 } 1768 } 1769 /* Slave array needs update. */ 1770 *update_slave_arr = true; 1771 } 1772 1773 /* if the selected aggregator is of join individuals 1774 * (partner_system is NULL), enable their ports 1775 */ 1776 active = __get_active_agg(origin); 1777 1778 if (active) { 1779 if (!__agg_has_partner(active)) { 1780 for (port = active->lag_ports; port; 1781 port = port->next_port_in_aggregator) { 1782 __enable_port(port); 1783 } 1784 *update_slave_arr = true; 1785 } 1786 } 1787 1788 rcu_read_unlock(); 1789 1790 bond_3ad_set_carrier(bond); 1791 } 1792 1793 /** 1794 * ad_clear_agg - clear a given aggregator's parameters 1795 * @aggregator: the aggregator we're looking at 1796 */ 1797 static void ad_clear_agg(struct aggregator *aggregator) 1798 { 1799 if (aggregator) { 1800 aggregator->is_individual = false; 1801 aggregator->actor_admin_aggregator_key = 0; 1802 aggregator->actor_oper_aggregator_key = 0; 1803 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1804 aggregator->partner_system_priority = 0; 1805 aggregator->partner_oper_aggregator_key = 0; 1806 aggregator->receive_state = 0; 1807 aggregator->transmit_state = 0; 1808 aggregator->lag_ports = NULL; 1809 aggregator->is_active = 0; 1810 aggregator->num_of_ports = 0; 1811 pr_debug("%s: LAG %d was cleared\n", 1812 aggregator->slave ? 1813 aggregator->slave->dev->name : "NULL", 1814 aggregator->aggregator_identifier); 1815 } 1816 } 1817 1818 /** 1819 * ad_initialize_agg - initialize a given aggregator's parameters 1820 * @aggregator: the aggregator we're looking at 1821 */ 1822 static void ad_initialize_agg(struct aggregator *aggregator) 1823 { 1824 if (aggregator) { 1825 ad_clear_agg(aggregator); 1826 1827 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1828 aggregator->aggregator_identifier = 0; 1829 aggregator->slave = NULL; 1830 } 1831 } 1832 1833 /** 1834 * ad_initialize_port - initialize a given port's parameters 1835 * @port: the port we're looking at 1836 * @lacp_fast: boolean. whether fast periodic should be used 1837 */ 1838 static void ad_initialize_port(struct port *port, int lacp_fast) 1839 { 1840 static const struct port_params tmpl = { 1841 .system_priority = 0xffff, 1842 .key = 1, 1843 .port_number = 1, 1844 .port_priority = 0xff, 1845 .port_state = 1, 1846 }; 1847 static const struct lacpdu lacpdu = { 1848 .subtype = 0x01, 1849 .version_number = 0x01, 1850 .tlv_type_actor_info = 0x01, 1851 .actor_information_length = 0x14, 1852 .tlv_type_partner_info = 0x02, 1853 .partner_information_length = 0x14, 1854 .tlv_type_collector_info = 0x03, 1855 .collector_information_length = 0x10, 1856 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1857 }; 1858 1859 if (port) { 1860 port->actor_port_priority = 0xff; 1861 port->actor_port_aggregator_identifier = 0; 1862 port->ntt = false; 1863 port->actor_admin_port_state = LACP_STATE_AGGREGATION | 1864 LACP_STATE_LACP_ACTIVITY; 1865 port->actor_oper_port_state = LACP_STATE_AGGREGATION | 1866 LACP_STATE_LACP_ACTIVITY; 1867 1868 if (lacp_fast) 1869 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 1870 1871 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1872 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1873 1874 port->is_enabled = true; 1875 /* private parameters */ 1876 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1877 port->sm_rx_state = 0; 1878 port->sm_rx_timer_counter = 0; 1879 port->sm_periodic_state = 0; 1880 port->sm_periodic_timer_counter = 0; 1881 port->sm_mux_state = 0; 1882 port->sm_mux_timer_counter = 0; 1883 port->sm_tx_state = 0; 1884 port->aggregator = NULL; 1885 port->next_port_in_aggregator = NULL; 1886 port->transaction_id = 0; 1887 1888 port->sm_churn_actor_timer_counter = 0; 1889 port->sm_churn_actor_state = 0; 1890 port->churn_actor_count = 0; 1891 port->sm_churn_partner_timer_counter = 0; 1892 port->sm_churn_partner_state = 0; 1893 port->churn_partner_count = 0; 1894 1895 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1896 } 1897 } 1898 1899 /** 1900 * ad_enable_collecting_distributing - enable a port's transmit/receive 1901 * @port: the port we're looking at 1902 * @update_slave_arr: Does slave array need update? 1903 * 1904 * Enable @port if it's in an active aggregator 1905 */ 1906 static void ad_enable_collecting_distributing(struct port *port, 1907 bool *update_slave_arr) 1908 { 1909 if (port->aggregator->is_active) { 1910 slave_dbg(port->slave->bond->dev, port->slave->dev, 1911 "Enabling port %d (LAG %d)\n", 1912 port->actor_port_number, 1913 port->aggregator->aggregator_identifier); 1914 __enable_port(port); 1915 /* Slave array needs update */ 1916 *update_slave_arr = true; 1917 } 1918 } 1919 1920 /** 1921 * ad_disable_collecting_distributing - disable a port's transmit/receive 1922 * @port: the port we're looking at 1923 * @update_slave_arr: Does slave array need update? 1924 */ 1925 static void ad_disable_collecting_distributing(struct port *port, 1926 bool *update_slave_arr) 1927 { 1928 if (port->aggregator && 1929 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1930 &(null_mac_addr))) { 1931 slave_dbg(port->slave->bond->dev, port->slave->dev, 1932 "Disabling port %d (LAG %d)\n", 1933 port->actor_port_number, 1934 port->aggregator->aggregator_identifier); 1935 __disable_port(port); 1936 /* Slave array needs an update */ 1937 *update_slave_arr = true; 1938 } 1939 } 1940 1941 /** 1942 * ad_marker_info_received - handle receive of a Marker information frame 1943 * @marker_info: Marker info received 1944 * @port: the port we're looking at 1945 */ 1946 static void ad_marker_info_received(struct bond_marker *marker_info, 1947 struct port *port) 1948 { 1949 struct bond_marker marker; 1950 1951 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx); 1952 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx); 1953 1954 /* copy the received marker data to the response marker */ 1955 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1956 /* change the marker subtype to marker response */ 1957 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1958 1959 /* send the marker response */ 1960 if (ad_marker_send(port, &marker) >= 0) 1961 slave_dbg(port->slave->bond->dev, port->slave->dev, 1962 "Sent Marker Response on port %d\n", 1963 port->actor_port_number); 1964 } 1965 1966 /** 1967 * ad_marker_response_received - handle receive of a marker response frame 1968 * @marker: marker PDU received 1969 * @port: the port we're looking at 1970 * 1971 * This function does nothing since we decided not to implement send and handle 1972 * response for marker PDU's, in this stage, but only to respond to marker 1973 * information. 1974 */ 1975 static void ad_marker_response_received(struct bond_marker *marker, 1976 struct port *port) 1977 { 1978 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx); 1979 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx); 1980 1981 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1982 } 1983 1984 /* ========= AD exported functions to the main bonding code ========= */ 1985 1986 /* Check aggregators status in team every T seconds */ 1987 #define AD_AGGREGATOR_SELECTION_TIMER 8 1988 1989 /** 1990 * bond_3ad_initiate_agg_selection - initate aggregator selection 1991 * @bond: bonding struct 1992 * @timeout: timeout value to set 1993 * 1994 * Set the aggregation selection timer, to initiate an agg selection in 1995 * the very near future. Called during first initialization, and during 1996 * any down to up transitions of the bond. 1997 */ 1998 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1999 { 2000 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout); 2001 } 2002 2003 /** 2004 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 2005 * @bond: bonding struct to work on 2006 * 2007 * Can be called only after the mac address of the bond is set. 2008 */ 2009 void bond_3ad_initialize(struct bonding *bond) 2010 { 2011 BOND_AD_INFO(bond).aggregator_identifier = 0; 2012 BOND_AD_INFO(bond).system.sys_priority = 2013 bond->params.ad_actor_sys_prio; 2014 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2015 BOND_AD_INFO(bond).system.sys_mac_addr = 2016 *((struct mac_addr *)bond->dev->dev_addr); 2017 else 2018 BOND_AD_INFO(bond).system.sys_mac_addr = 2019 *((struct mac_addr *)bond->params.ad_actor_system); 2020 2021 bond_3ad_initiate_agg_selection(bond, 2022 AD_AGGREGATOR_SELECTION_TIMER * 2023 ad_ticks_per_sec); 2024 } 2025 2026 /** 2027 * bond_3ad_bind_slave - initialize a slave's port 2028 * @slave: slave struct to work on 2029 * 2030 * Returns: 0 on success 2031 * < 0 on error 2032 */ 2033 void bond_3ad_bind_slave(struct slave *slave) 2034 { 2035 struct bonding *bond = bond_get_bond_by_slave(slave); 2036 struct port *port; 2037 struct aggregator *aggregator; 2038 2039 /* check that the slave has not been initialized yet. */ 2040 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2041 2042 /* port initialization */ 2043 port = &(SLAVE_AD_INFO(slave)->port); 2044 2045 ad_initialize_port(port, bond->params.lacp_fast); 2046 2047 port->slave = slave; 2048 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2049 /* key is determined according to the link speed, duplex and 2050 * user key 2051 */ 2052 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2053 ad_update_actor_keys(port, false); 2054 /* actor system is the bond's system */ 2055 __ad_actor_update_port(port); 2056 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2057 * lacpdu's are sent in one second) 2058 */ 2059 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2060 2061 __disable_port(port); 2062 2063 /* aggregator initialization */ 2064 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2065 2066 ad_initialize_agg(aggregator); 2067 2068 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2069 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2070 aggregator->slave = slave; 2071 aggregator->is_active = 0; 2072 aggregator->num_of_ports = 0; 2073 } 2074 } 2075 2076 /** 2077 * bond_3ad_unbind_slave - deinitialize a slave's port 2078 * @slave: slave struct to work on 2079 * 2080 * Search for the aggregator that is related to this port, remove the 2081 * aggregator and assign another aggregator for other port related to it 2082 * (if any), and remove the port. 2083 */ 2084 void bond_3ad_unbind_slave(struct slave *slave) 2085 { 2086 struct port *port, *prev_port, *temp_port; 2087 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2088 int select_new_active_agg = 0; 2089 struct bonding *bond = slave->bond; 2090 struct slave *slave_iter; 2091 struct list_head *iter; 2092 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2093 2094 /* Sync against bond_3ad_state_machine_handler() */ 2095 spin_lock_bh(&bond->mode_lock); 2096 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2097 port = &(SLAVE_AD_INFO(slave)->port); 2098 2099 /* if slave is null, the whole port is not initialized */ 2100 if (!port->slave) { 2101 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n"); 2102 goto out; 2103 } 2104 2105 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n", 2106 aggregator->aggregator_identifier); 2107 2108 /* Tell the partner that this port is not suitable for aggregation */ 2109 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 2110 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 2111 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 2112 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION; 2113 __update_lacpdu_from_port(port); 2114 ad_lacpdu_send(port); 2115 2116 /* check if this aggregator is occupied */ 2117 if (aggregator->lag_ports) { 2118 /* check if there are other ports related to this aggregator 2119 * except the port related to this slave(thats ensure us that 2120 * there is a reason to search for new aggregator, and that we 2121 * will find one 2122 */ 2123 if ((aggregator->lag_ports != port) || 2124 (aggregator->lag_ports->next_port_in_aggregator)) { 2125 /* find new aggregator for the related port(s) */ 2126 bond_for_each_slave(bond, slave_iter, iter) { 2127 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2128 /* if the new aggregator is empty, or it is 2129 * connected to our port only 2130 */ 2131 if (!new_aggregator->lag_ports || 2132 ((new_aggregator->lag_ports == port) && 2133 !new_aggregator->lag_ports->next_port_in_aggregator)) 2134 break; 2135 } 2136 if (!slave_iter) 2137 new_aggregator = NULL; 2138 2139 /* if new aggregator found, copy the aggregator's 2140 * parameters and connect the related lag_ports to the 2141 * new aggregator 2142 */ 2143 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2144 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2145 aggregator->aggregator_identifier, 2146 new_aggregator->aggregator_identifier); 2147 2148 if ((new_aggregator->lag_ports == port) && 2149 new_aggregator->is_active) { 2150 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2151 select_new_active_agg = 1; 2152 } 2153 2154 new_aggregator->is_individual = aggregator->is_individual; 2155 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2156 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2157 new_aggregator->partner_system = aggregator->partner_system; 2158 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2159 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2160 new_aggregator->receive_state = aggregator->receive_state; 2161 new_aggregator->transmit_state = aggregator->transmit_state; 2162 new_aggregator->lag_ports = aggregator->lag_ports; 2163 new_aggregator->is_active = aggregator->is_active; 2164 new_aggregator->num_of_ports = aggregator->num_of_ports; 2165 2166 /* update the information that is written on 2167 * the ports about the aggregator 2168 */ 2169 for (temp_port = aggregator->lag_ports; temp_port; 2170 temp_port = temp_port->next_port_in_aggregator) { 2171 temp_port->aggregator = new_aggregator; 2172 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2173 } 2174 2175 ad_clear_agg(aggregator); 2176 2177 if (select_new_active_agg) 2178 ad_agg_selection_logic(__get_first_agg(port), 2179 &dummy_slave_update); 2180 } else { 2181 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2182 } 2183 } else { 2184 /* in case that the only port related to this 2185 * aggregator is the one we want to remove 2186 */ 2187 select_new_active_agg = aggregator->is_active; 2188 ad_clear_agg(aggregator); 2189 if (select_new_active_agg) { 2190 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2191 /* select new active aggregator */ 2192 temp_aggregator = __get_first_agg(port); 2193 if (temp_aggregator) 2194 ad_agg_selection_logic(temp_aggregator, 2195 &dummy_slave_update); 2196 } 2197 } 2198 } 2199 2200 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number); 2201 2202 /* find the aggregator that this port is connected to */ 2203 bond_for_each_slave(bond, slave_iter, iter) { 2204 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2205 prev_port = NULL; 2206 /* search the port in the aggregator's related ports */ 2207 for (temp_port = temp_aggregator->lag_ports; temp_port; 2208 prev_port = temp_port, 2209 temp_port = temp_port->next_port_in_aggregator) { 2210 if (temp_port == port) { 2211 /* the aggregator found - detach the port from 2212 * this aggregator 2213 */ 2214 if (prev_port) 2215 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2216 else 2217 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2218 temp_aggregator->num_of_ports--; 2219 if (__agg_active_ports(temp_aggregator) == 0) { 2220 select_new_active_agg = temp_aggregator->is_active; 2221 if (temp_aggregator->num_of_ports == 0) 2222 ad_clear_agg(temp_aggregator); 2223 if (select_new_active_agg) { 2224 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2225 /* select new active aggregator */ 2226 ad_agg_selection_logic(__get_first_agg(port), 2227 &dummy_slave_update); 2228 } 2229 } 2230 break; 2231 } 2232 } 2233 } 2234 port->slave = NULL; 2235 2236 out: 2237 spin_unlock_bh(&bond->mode_lock); 2238 } 2239 2240 /** 2241 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2242 * @bond: bonding struct to work on 2243 * 2244 * If an ad_actor setting gets changed we need to update the individual port 2245 * settings so the bond device will use the new values when it gets upped. 2246 */ 2247 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2248 { 2249 struct list_head *iter; 2250 struct slave *slave; 2251 2252 ASSERT_RTNL(); 2253 2254 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2255 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2256 BOND_AD_INFO(bond).system.sys_mac_addr = 2257 *((struct mac_addr *)bond->dev->dev_addr); 2258 else 2259 BOND_AD_INFO(bond).system.sys_mac_addr = 2260 *((struct mac_addr *)bond->params.ad_actor_system); 2261 2262 spin_lock_bh(&bond->mode_lock); 2263 bond_for_each_slave(bond, slave, iter) { 2264 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2265 2266 __ad_actor_update_port(port); 2267 port->ntt = true; 2268 } 2269 spin_unlock_bh(&bond->mode_lock); 2270 } 2271 2272 /** 2273 * bond_agg_timer_advance - advance agg_select_timer 2274 * @bond: bonding structure 2275 * 2276 * Return true when agg_select_timer reaches 0. 2277 */ 2278 static bool bond_agg_timer_advance(struct bonding *bond) 2279 { 2280 int val, nval; 2281 2282 while (1) { 2283 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer); 2284 if (!val) 2285 return false; 2286 nval = val - 1; 2287 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer, 2288 val, nval) == val) 2289 break; 2290 } 2291 return nval == 0; 2292 } 2293 2294 /** 2295 * bond_3ad_state_machine_handler - handle state machines timeout 2296 * @work: work context to fetch bonding struct to work on from 2297 * 2298 * The state machine handling concept in this module is to check every tick 2299 * which state machine should operate any function. The execution order is 2300 * round robin, so when we have an interaction between state machines, the 2301 * reply of one to each other might be delayed until next tick. 2302 * 2303 * This function also complete the initialization when the agg_select_timer 2304 * times out, and it selects an aggregator for the ports that are yet not 2305 * related to any aggregator, and selects the active aggregator for a bond. 2306 */ 2307 void bond_3ad_state_machine_handler(struct work_struct *work) 2308 { 2309 struct bonding *bond = container_of(work, struct bonding, 2310 ad_work.work); 2311 struct aggregator *aggregator; 2312 struct list_head *iter; 2313 struct slave *slave; 2314 struct port *port; 2315 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2316 bool update_slave_arr = false; 2317 2318 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2319 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2320 * concurrently due to incoming LACPDU as well. 2321 */ 2322 spin_lock_bh(&bond->mode_lock); 2323 rcu_read_lock(); 2324 2325 /* check if there are any slaves */ 2326 if (!bond_has_slaves(bond)) 2327 goto re_arm; 2328 2329 if (bond_agg_timer_advance(bond)) { 2330 slave = bond_first_slave_rcu(bond); 2331 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2332 2333 /* select the active aggregator for the bond */ 2334 if (port) { 2335 if (!port->slave) { 2336 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2337 bond->dev->name); 2338 goto re_arm; 2339 } 2340 2341 aggregator = __get_first_agg(port); 2342 ad_agg_selection_logic(aggregator, &update_slave_arr); 2343 } 2344 bond_3ad_set_carrier(bond); 2345 } 2346 2347 /* for each port run the state machines */ 2348 bond_for_each_slave_rcu(bond, slave, iter) { 2349 port = &(SLAVE_AD_INFO(slave)->port); 2350 if (!port->slave) { 2351 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2352 bond->dev->name); 2353 goto re_arm; 2354 } 2355 2356 ad_rx_machine(NULL, port); 2357 ad_periodic_machine(port, &bond->params); 2358 ad_port_selection_logic(port, &update_slave_arr); 2359 ad_mux_machine(port, &update_slave_arr); 2360 ad_tx_machine(port); 2361 ad_churn_machine(port); 2362 2363 /* turn off the BEGIN bit, since we already handled it */ 2364 if (port->sm_vars & AD_PORT_BEGIN) 2365 port->sm_vars &= ~AD_PORT_BEGIN; 2366 } 2367 2368 re_arm: 2369 bond_for_each_slave_rcu(bond, slave, iter) { 2370 if (slave->should_notify) { 2371 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2372 break; 2373 } 2374 } 2375 rcu_read_unlock(); 2376 spin_unlock_bh(&bond->mode_lock); 2377 2378 if (update_slave_arr) 2379 bond_slave_arr_work_rearm(bond, 0); 2380 2381 if (should_notify_rtnl && rtnl_trylock()) { 2382 bond_slave_state_notify(bond); 2383 rtnl_unlock(); 2384 } 2385 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2386 } 2387 2388 /** 2389 * bond_3ad_rx_indication - handle a received frame 2390 * @lacpdu: received lacpdu 2391 * @slave: slave struct to work on 2392 * 2393 * It is assumed that frames that were sent on this NIC don't returned as new 2394 * received frames (loopback). Since only the payload is given to this 2395 * function, it check for loopback. 2396 */ 2397 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave) 2398 { 2399 struct bonding *bond = slave->bond; 2400 int ret = RX_HANDLER_ANOTHER; 2401 struct bond_marker *marker; 2402 struct port *port; 2403 atomic64_t *stat; 2404 2405 port = &(SLAVE_AD_INFO(slave)->port); 2406 if (!port->slave) { 2407 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2408 slave->dev->name, slave->bond->dev->name); 2409 return ret; 2410 } 2411 2412 switch (lacpdu->subtype) { 2413 case AD_TYPE_LACPDU: 2414 ret = RX_HANDLER_CONSUMED; 2415 slave_dbg(slave->bond->dev, slave->dev, 2416 "Received LACPDU on port %d\n", 2417 port->actor_port_number); 2418 /* Protect against concurrent state machines */ 2419 spin_lock(&slave->bond->mode_lock); 2420 ad_rx_machine(lacpdu, port); 2421 spin_unlock(&slave->bond->mode_lock); 2422 break; 2423 case AD_TYPE_MARKER: 2424 ret = RX_HANDLER_CONSUMED; 2425 /* No need to convert fields to Little Endian since we 2426 * don't use the marker's fields. 2427 */ 2428 marker = (struct bond_marker *)lacpdu; 2429 switch (marker->tlv_type) { 2430 case AD_MARKER_INFORMATION_SUBTYPE: 2431 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n", 2432 port->actor_port_number); 2433 ad_marker_info_received(marker, port); 2434 break; 2435 case AD_MARKER_RESPONSE_SUBTYPE: 2436 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n", 2437 port->actor_port_number); 2438 ad_marker_response_received(marker, port); 2439 break; 2440 default: 2441 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n", 2442 port->actor_port_number); 2443 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx; 2444 atomic64_inc(stat); 2445 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx; 2446 atomic64_inc(stat); 2447 } 2448 break; 2449 default: 2450 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx); 2451 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx); 2452 } 2453 2454 return ret; 2455 } 2456 2457 /** 2458 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2459 * its current speed and duplex settings. 2460 * 2461 * @port: the port we'are looking at 2462 * @reset: Boolean to just reset the speed and the duplex part of the key 2463 * 2464 * The logic to change the oper / admin keys is: 2465 * (a) A full duplex port can participate in LACP with partner. 2466 * (b) When the speed is changed, LACP need to be reinitiated. 2467 */ 2468 static void ad_update_actor_keys(struct port *port, bool reset) 2469 { 2470 u8 duplex = 0; 2471 u16 ospeed = 0, speed = 0; 2472 u16 old_oper_key = port->actor_oper_port_key; 2473 2474 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2475 if (!reset) { 2476 speed = __get_link_speed(port); 2477 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2478 duplex = __get_duplex(port); 2479 port->actor_admin_port_key |= (speed << 1) | duplex; 2480 } 2481 port->actor_oper_port_key = port->actor_admin_port_key; 2482 2483 if (old_oper_key != port->actor_oper_port_key) { 2484 /* Only 'duplex' port participates in LACP */ 2485 if (duplex) 2486 port->sm_vars |= AD_PORT_LACP_ENABLED; 2487 else 2488 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2489 2490 if (!reset) { 2491 if (!speed) { 2492 slave_err(port->slave->bond->dev, 2493 port->slave->dev, 2494 "speed changed to 0 on port %d\n", 2495 port->actor_port_number); 2496 } else if (duplex && ospeed != speed) { 2497 /* Speed change restarts LACP state-machine */ 2498 port->sm_vars |= AD_PORT_BEGIN; 2499 } 2500 } 2501 } 2502 } 2503 2504 /** 2505 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2506 * change indication 2507 * 2508 * @slave: slave struct to work on 2509 * 2510 * Handle reselection of aggregator (if needed) for this port. 2511 */ 2512 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2513 { 2514 struct port *port; 2515 2516 port = &(SLAVE_AD_INFO(slave)->port); 2517 2518 /* if slave is null, the whole port is not initialized */ 2519 if (!port->slave) { 2520 slave_warn(slave->bond->dev, slave->dev, 2521 "speed/duplex changed for uninitialized port\n"); 2522 return; 2523 } 2524 2525 spin_lock_bh(&slave->bond->mode_lock); 2526 ad_update_actor_keys(port, false); 2527 spin_unlock_bh(&slave->bond->mode_lock); 2528 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n", 2529 port->actor_port_number); 2530 } 2531 2532 /** 2533 * bond_3ad_handle_link_change - handle a slave's link status change indication 2534 * @slave: slave struct to work on 2535 * @link: whether the link is now up or down 2536 * 2537 * Handle reselection of aggregator (if needed) for this port. 2538 */ 2539 void bond_3ad_handle_link_change(struct slave *slave, char link) 2540 { 2541 struct aggregator *agg; 2542 struct port *port; 2543 bool dummy; 2544 2545 port = &(SLAVE_AD_INFO(slave)->port); 2546 2547 /* if slave is null, the whole port is not initialized */ 2548 if (!port->slave) { 2549 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n"); 2550 return; 2551 } 2552 2553 spin_lock_bh(&slave->bond->mode_lock); 2554 /* on link down we are zeroing duplex and speed since 2555 * some of the adaptors(ce1000.lan) report full duplex/speed 2556 * instead of N/A(duplex) / 0(speed). 2557 * 2558 * on link up we are forcing recheck on the duplex and speed since 2559 * some of he adaptors(ce1000.lan) report. 2560 */ 2561 if (link == BOND_LINK_UP) { 2562 port->is_enabled = true; 2563 ad_update_actor_keys(port, false); 2564 } else { 2565 /* link has failed */ 2566 port->is_enabled = false; 2567 ad_update_actor_keys(port, true); 2568 } 2569 agg = __get_first_agg(port); 2570 ad_agg_selection_logic(agg, &dummy); 2571 2572 spin_unlock_bh(&slave->bond->mode_lock); 2573 2574 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n", 2575 port->actor_port_number, 2576 link == BOND_LINK_UP ? "UP" : "DOWN"); 2577 2578 /* RTNL is held and mode_lock is released so it's safe 2579 * to update slave_array here. 2580 */ 2581 bond_update_slave_arr(slave->bond, NULL); 2582 } 2583 2584 /** 2585 * bond_3ad_set_carrier - set link state for bonding master 2586 * @bond: bonding structure 2587 * 2588 * if we have an active aggregator, we're up, if not, we're down. 2589 * Presumes that we cannot have an active aggregator if there are 2590 * no slaves with link up. 2591 * 2592 * This behavior complies with IEEE 802.3 section 43.3.9. 2593 * 2594 * Called by bond_set_carrier(). Return zero if carrier state does not 2595 * change, nonzero if it does. 2596 */ 2597 int bond_3ad_set_carrier(struct bonding *bond) 2598 { 2599 struct aggregator *active; 2600 struct slave *first_slave; 2601 int ret = 1; 2602 2603 rcu_read_lock(); 2604 first_slave = bond_first_slave_rcu(bond); 2605 if (!first_slave) { 2606 ret = 0; 2607 goto out; 2608 } 2609 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2610 if (active) { 2611 /* are enough slaves available to consider link up? */ 2612 if (__agg_active_ports(active) < bond->params.min_links) { 2613 if (netif_carrier_ok(bond->dev)) { 2614 netif_carrier_off(bond->dev); 2615 goto out; 2616 } 2617 } else if (!netif_carrier_ok(bond->dev)) { 2618 netif_carrier_on(bond->dev); 2619 goto out; 2620 } 2621 } else if (netif_carrier_ok(bond->dev)) { 2622 netif_carrier_off(bond->dev); 2623 } 2624 out: 2625 rcu_read_unlock(); 2626 return ret; 2627 } 2628 2629 /** 2630 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2631 * @bond: bonding struct to work on 2632 * @ad_info: ad_info struct to fill with the bond's info 2633 * 2634 * Returns: 0 on success 2635 * < 0 on error 2636 */ 2637 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2638 struct ad_info *ad_info) 2639 { 2640 struct aggregator *aggregator = NULL; 2641 struct list_head *iter; 2642 struct slave *slave; 2643 struct port *port; 2644 2645 bond_for_each_slave_rcu(bond, slave, iter) { 2646 port = &(SLAVE_AD_INFO(slave)->port); 2647 if (port->aggregator && port->aggregator->is_active) { 2648 aggregator = port->aggregator; 2649 break; 2650 } 2651 } 2652 2653 if (!aggregator) 2654 return -1; 2655 2656 ad_info->aggregator_id = aggregator->aggregator_identifier; 2657 ad_info->ports = __agg_active_ports(aggregator); 2658 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2659 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2660 ether_addr_copy(ad_info->partner_system, 2661 aggregator->partner_system.mac_addr_value); 2662 return 0; 2663 } 2664 2665 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2666 { 2667 int ret; 2668 2669 rcu_read_lock(); 2670 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2671 rcu_read_unlock(); 2672 2673 return ret; 2674 } 2675 2676 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2677 struct slave *slave) 2678 { 2679 struct lacpdu *lacpdu, _lacpdu; 2680 2681 if (skb->protocol != PKT_TYPE_LACPDU) 2682 return RX_HANDLER_ANOTHER; 2683 2684 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2685 return RX_HANDLER_ANOTHER; 2686 2687 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2688 if (!lacpdu) { 2689 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx); 2690 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx); 2691 return RX_HANDLER_ANOTHER; 2692 } 2693 2694 return bond_3ad_rx_indication(lacpdu, slave); 2695 } 2696 2697 /** 2698 * bond_3ad_update_lacp_rate - change the lacp rate 2699 * @bond: bonding struct 2700 * 2701 * When modify lacp_rate parameter via sysfs, 2702 * update actor_oper_port_state of each port. 2703 * 2704 * Hold bond->mode_lock, 2705 * so we can modify port->actor_oper_port_state, 2706 * no matter bond is up or down. 2707 */ 2708 void bond_3ad_update_lacp_rate(struct bonding *bond) 2709 { 2710 struct port *port = NULL; 2711 struct list_head *iter; 2712 struct slave *slave; 2713 int lacp_fast; 2714 2715 lacp_fast = bond->params.lacp_fast; 2716 spin_lock_bh(&bond->mode_lock); 2717 bond_for_each_slave(bond, slave, iter) { 2718 port = &(SLAVE_AD_INFO(slave)->port); 2719 if (lacp_fast) 2720 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 2721 else 2722 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT; 2723 } 2724 spin_unlock_bh(&bond->mode_lock); 2725 } 2726 2727 size_t bond_3ad_stats_size(void) 2728 { 2729 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */ 2730 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */ 2731 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */ 2732 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */ 2733 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */ 2734 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */ 2735 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */ 2736 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */ 2737 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */ 2738 } 2739 2740 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats) 2741 { 2742 u64 val; 2743 2744 val = atomic64_read(&stats->lacpdu_rx); 2745 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val, 2746 BOND_3AD_STAT_PAD)) 2747 return -EMSGSIZE; 2748 val = atomic64_read(&stats->lacpdu_tx); 2749 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val, 2750 BOND_3AD_STAT_PAD)) 2751 return -EMSGSIZE; 2752 val = atomic64_read(&stats->lacpdu_unknown_rx); 2753 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val, 2754 BOND_3AD_STAT_PAD)) 2755 return -EMSGSIZE; 2756 val = atomic64_read(&stats->lacpdu_illegal_rx); 2757 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val, 2758 BOND_3AD_STAT_PAD)) 2759 return -EMSGSIZE; 2760 2761 val = atomic64_read(&stats->marker_rx); 2762 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val, 2763 BOND_3AD_STAT_PAD)) 2764 return -EMSGSIZE; 2765 val = atomic64_read(&stats->marker_tx); 2766 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val, 2767 BOND_3AD_STAT_PAD)) 2768 return -EMSGSIZE; 2769 val = atomic64_read(&stats->marker_resp_rx); 2770 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val, 2771 BOND_3AD_STAT_PAD)) 2772 return -EMSGSIZE; 2773 val = atomic64_read(&stats->marker_resp_tx); 2774 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val, 2775 BOND_3AD_STAT_PAD)) 2776 return -EMSGSIZE; 2777 val = atomic64_read(&stats->marker_unknown_rx); 2778 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val, 2779 BOND_3AD_STAT_PAD)) 2780 return -EMSGSIZE; 2781 2782 return 0; 2783 } 2784