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 }; 77 78 /* compare MAC addresses */ 79 #define MAC_ADDRESS_EQUAL(A, B) \ 80 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 81 82 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 83 0, 0, 0, 0, 0, 0 84 }; 85 static u16 ad_ticks_per_sec; 86 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 87 88 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = 89 MULTICAST_LACPDU_ADDR; 90 91 /* ================= main 802.3ad protocol functions ================== */ 92 static int ad_lacpdu_send(struct port *port); 93 static int ad_marker_send(struct port *port, struct bond_marker *marker); 94 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 95 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 96 static void ad_tx_machine(struct port *port); 97 static void ad_periodic_machine(struct port *port); 98 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 99 static void ad_agg_selection_logic(struct aggregator *aggregator, 100 bool *update_slave_arr); 101 static void ad_clear_agg(struct aggregator *aggregator); 102 static void ad_initialize_agg(struct aggregator *aggregator); 103 static void ad_initialize_port(struct port *port, int lacp_fast); 104 static void ad_enable_collecting_distributing(struct port *port, 105 bool *update_slave_arr); 106 static void ad_disable_collecting_distributing(struct port *port, 107 bool *update_slave_arr); 108 static void ad_marker_info_received(struct bond_marker *marker_info, 109 struct port *port); 110 static void ad_marker_response_received(struct bond_marker *marker, 111 struct port *port); 112 static void ad_update_actor_keys(struct port *port, bool reset); 113 114 115 /* ================= api to bonding and kernel code ================== */ 116 117 /** 118 * __get_bond_by_port - get the port's bonding struct 119 * @port: the port we're looking at 120 * 121 * Return @port's bonding struct, or %NULL if it can't be found. 122 */ 123 static inline struct bonding *__get_bond_by_port(struct port *port) 124 { 125 if (port->slave == NULL) 126 return NULL; 127 128 return bond_get_bond_by_slave(port->slave); 129 } 130 131 /** 132 * __get_first_agg - get the first aggregator in the bond 133 * @bond: the bond we're looking at 134 * 135 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 136 * found. 137 * The caller must hold RCU or RTNL lock. 138 */ 139 static inline struct aggregator *__get_first_agg(struct port *port) 140 { 141 struct bonding *bond = __get_bond_by_port(port); 142 struct slave *first_slave; 143 struct aggregator *agg; 144 145 /* If there's no bond for this port, or bond has no slaves */ 146 if (bond == NULL) 147 return NULL; 148 149 rcu_read_lock(); 150 first_slave = bond_first_slave_rcu(bond); 151 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 152 rcu_read_unlock(); 153 154 return agg; 155 } 156 157 /** 158 * __agg_has_partner - see if we have a partner 159 * @agg: the agregator we're looking at 160 * 161 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 162 * address for the partner). Return 0 if not. 163 */ 164 static inline int __agg_has_partner(struct aggregator *agg) 165 { 166 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 167 } 168 169 /** 170 * __disable_port - disable the port's slave 171 * @port: the port we're looking at 172 */ 173 static inline void __disable_port(struct port *port) 174 { 175 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 176 } 177 178 /** 179 * __enable_port - enable the port's slave, if it's up 180 * @port: the port we're looking at 181 */ 182 static inline void __enable_port(struct port *port) 183 { 184 struct slave *slave = port->slave; 185 186 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 187 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 188 } 189 190 /** 191 * __port_is_enabled - check if the port's slave is in active state 192 * @port: the port we're looking at 193 */ 194 static inline int __port_is_enabled(struct port *port) 195 { 196 return bond_is_active_slave(port->slave); 197 } 198 199 /** 200 * __get_agg_selection_mode - get the aggregator selection mode 201 * @port: the port we're looking at 202 * 203 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 204 */ 205 static inline u32 __get_agg_selection_mode(struct port *port) 206 { 207 struct bonding *bond = __get_bond_by_port(port); 208 209 if (bond == NULL) 210 return BOND_AD_STABLE; 211 212 return bond->params.ad_select; 213 } 214 215 /** 216 * __check_agg_selection_timer - check if the selection timer has expired 217 * @port: the port we're looking at 218 */ 219 static inline int __check_agg_selection_timer(struct port *port) 220 { 221 struct bonding *bond = __get_bond_by_port(port); 222 223 if (bond == NULL) 224 return 0; 225 226 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 227 } 228 229 /** 230 * __get_link_speed - get a port's speed 231 * @port: the port we're looking at 232 * 233 * Return @port's speed in 802.3ad enum format. i.e. one of: 234 * 0, 235 * %AD_LINK_SPEED_10MBPS, 236 * %AD_LINK_SPEED_100MBPS, 237 * %AD_LINK_SPEED_1000MBPS, 238 * %AD_LINK_SPEED_2500MBPS, 239 * %AD_LINK_SPEED_5000MBPS, 240 * %AD_LINK_SPEED_10000MBPS 241 * %AD_LINK_SPEED_14000MBPS, 242 * %AD_LINK_SPEED_20000MBPS 243 * %AD_LINK_SPEED_25000MBPS 244 * %AD_LINK_SPEED_40000MBPS 245 * %AD_LINK_SPEED_50000MBPS 246 * %AD_LINK_SPEED_56000MBPS 247 * %AD_LINK_SPEED_100000MBPS 248 */ 249 static u16 __get_link_speed(struct port *port) 250 { 251 struct slave *slave = port->slave; 252 u16 speed; 253 254 /* this if covers only a special case: when the configuration starts 255 * with link down, it sets the speed to 0. 256 * This is done in spite of the fact that the e100 driver reports 0 257 * to be compatible with MVT in the future. 258 */ 259 if (slave->link != BOND_LINK_UP) 260 speed = 0; 261 else { 262 switch (slave->speed) { 263 case SPEED_10: 264 speed = AD_LINK_SPEED_10MBPS; 265 break; 266 267 case SPEED_100: 268 speed = AD_LINK_SPEED_100MBPS; 269 break; 270 271 case SPEED_1000: 272 speed = AD_LINK_SPEED_1000MBPS; 273 break; 274 275 case SPEED_2500: 276 speed = AD_LINK_SPEED_2500MBPS; 277 break; 278 279 case SPEED_5000: 280 speed = AD_LINK_SPEED_5000MBPS; 281 break; 282 283 case SPEED_10000: 284 speed = AD_LINK_SPEED_10000MBPS; 285 break; 286 287 case SPEED_14000: 288 speed = AD_LINK_SPEED_14000MBPS; 289 break; 290 291 case SPEED_20000: 292 speed = AD_LINK_SPEED_20000MBPS; 293 break; 294 295 case SPEED_25000: 296 speed = AD_LINK_SPEED_25000MBPS; 297 break; 298 299 case SPEED_40000: 300 speed = AD_LINK_SPEED_40000MBPS; 301 break; 302 303 case SPEED_50000: 304 speed = AD_LINK_SPEED_50000MBPS; 305 break; 306 307 case SPEED_56000: 308 speed = AD_LINK_SPEED_56000MBPS; 309 break; 310 311 case SPEED_100000: 312 speed = AD_LINK_SPEED_100000MBPS; 313 break; 314 315 default: 316 /* unknown speed value from ethtool. shouldn't happen */ 317 if (slave->speed != SPEED_UNKNOWN) 318 pr_warn_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n", 319 slave->bond->dev->name, 320 slave->dev->name, slave->speed, 321 port->actor_port_number); 322 speed = 0; 323 break; 324 } 325 } 326 327 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n", 328 port->actor_port_number, speed); 329 return speed; 330 } 331 332 /** 333 * __get_duplex - get a port's duplex 334 * @port: the port we're looking at 335 * 336 * Return @port's duplex in 802.3ad bitmask format. i.e.: 337 * 0x01 if in full duplex 338 * 0x00 otherwise 339 */ 340 static u8 __get_duplex(struct port *port) 341 { 342 struct slave *slave = port->slave; 343 u8 retval = 0x0; 344 345 /* handling a special case: when the configuration starts with 346 * link down, it sets the duplex to 0. 347 */ 348 if (slave->link == BOND_LINK_UP) { 349 switch (slave->duplex) { 350 case DUPLEX_FULL: 351 retval = 0x1; 352 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n", 353 port->actor_port_number); 354 break; 355 case DUPLEX_HALF: 356 default: 357 retval = 0x0; 358 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n", 359 port->actor_port_number); 360 break; 361 } 362 } 363 return retval; 364 } 365 366 static void __ad_actor_update_port(struct port *port) 367 { 368 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 369 370 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 371 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 372 } 373 374 /* Conversions */ 375 376 /** 377 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 378 * @timer_type: which timer to operate 379 * @par: timer parameter. see below 380 * 381 * If @timer_type is %current_while_timer, @par indicates long/short timer. 382 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 383 * %SLOW_PERIODIC_TIME. 384 */ 385 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 386 { 387 u16 retval = 0; /* to silence the compiler */ 388 389 switch (timer_type) { 390 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 391 if (par) 392 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 393 else 394 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 395 break; 396 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 397 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 398 break; 399 case AD_PERIODIC_TIMER: /* for periodic machine */ 400 retval = (par*ad_ticks_per_sec); /* long timeout */ 401 break; 402 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 403 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 404 break; 405 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 406 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 407 break; 408 } 409 410 return retval; 411 } 412 413 414 /* ================= ad_rx_machine helper functions ================== */ 415 416 /** 417 * __choose_matched - update a port's matched variable from a received lacpdu 418 * @lacpdu: the lacpdu we've received 419 * @port: the port we're looking at 420 * 421 * Update the value of the matched variable, using parameter values from a 422 * newly received lacpdu. Parameter values for the partner carried in the 423 * received PDU are compared with the corresponding operational parameter 424 * values for the actor. Matched is set to TRUE if all of these parameters 425 * match and the PDU parameter partner_state.aggregation has the same value as 426 * actor_oper_port_state.aggregation and lacp will actively maintain the link 427 * in the aggregation. Matched is also set to TRUE if the value of 428 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 429 * an individual link and lacp will actively maintain the link. Otherwise, 430 * matched is set to FALSE. LACP is considered to be actively maintaining the 431 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 432 * the actor's actor_oper_port_state.lacp_activity and the PDU's 433 * partner_state.lacp_activity variables are TRUE. 434 * 435 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 436 * used here to implement the language from 802.3ad 43.4.9 that requires 437 * recordPDU to "match" the LACPDU parameters to the stored values. 438 */ 439 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 440 { 441 /* check if all parameters are alike 442 * or this is individual link(aggregation == FALSE) 443 * then update the state machine Matched variable. 444 */ 445 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 446 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 447 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 448 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 449 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 450 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) || 451 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0) 452 ) { 453 port->sm_vars |= AD_PORT_MATCHED; 454 } else { 455 port->sm_vars &= ~AD_PORT_MATCHED; 456 } 457 } 458 459 /** 460 * __record_pdu - record parameters from a received lacpdu 461 * @lacpdu: the lacpdu we've received 462 * @port: the port we're looking at 463 * 464 * Record the parameter values for the Actor carried in a received lacpdu as 465 * the current partner operational parameter values and sets 466 * actor_oper_port_state.defaulted to FALSE. 467 */ 468 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 469 { 470 if (lacpdu && port) { 471 struct port_params *partner = &port->partner_oper; 472 473 __choose_matched(lacpdu, port); 474 /* record the new parameter values for the partner 475 * operational 476 */ 477 partner->port_number = ntohs(lacpdu->actor_port); 478 partner->port_priority = ntohs(lacpdu->actor_port_priority); 479 partner->system = lacpdu->actor_system; 480 partner->system_priority = ntohs(lacpdu->actor_system_priority); 481 partner->key = ntohs(lacpdu->actor_key); 482 partner->port_state = lacpdu->actor_state; 483 484 /* set actor_oper_port_state.defaulted to FALSE */ 485 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED; 486 487 /* set the partner sync. to on if the partner is sync, 488 * and the port is matched 489 */ 490 if ((port->sm_vars & AD_PORT_MATCHED) && 491 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) { 492 partner->port_state |= LACP_STATE_SYNCHRONIZATION; 493 slave_dbg(port->slave->bond->dev, port->slave->dev, 494 "partner sync=1\n"); 495 } else { 496 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION; 497 slave_dbg(port->slave->bond->dev, port->slave->dev, 498 "partner sync=0\n"); 499 } 500 } 501 } 502 503 /** 504 * __record_default - record default parameters 505 * @port: the port we're looking at 506 * 507 * This function records the default parameter values for the partner carried 508 * in the Partner Admin parameters as the current partner operational parameter 509 * values and sets actor_oper_port_state.defaulted to TRUE. 510 */ 511 static void __record_default(struct port *port) 512 { 513 if (port) { 514 /* record the partner admin parameters */ 515 memcpy(&port->partner_oper, &port->partner_admin, 516 sizeof(struct port_params)); 517 518 /* set actor_oper_port_state.defaulted to true */ 519 port->actor_oper_port_state |= LACP_STATE_DEFAULTED; 520 } 521 } 522 523 /** 524 * __update_selected - update a port's Selected variable from a received lacpdu 525 * @lacpdu: the lacpdu we've received 526 * @port: the port we're looking at 527 * 528 * Update the value of the selected variable, using parameter values from a 529 * newly received lacpdu. The parameter values for the Actor carried in the 530 * received PDU are compared with the corresponding operational parameter 531 * values for the ports partner. If one or more of the comparisons shows that 532 * the value(s) received in the PDU differ from the current operational values, 533 * then selected is set to FALSE and actor_oper_port_state.synchronization is 534 * set to out_of_sync. Otherwise, selected remains unchanged. 535 */ 536 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 537 { 538 if (lacpdu && port) { 539 const struct port_params *partner = &port->partner_oper; 540 541 /* check if any parameter is different then 542 * update the state machine selected variable. 543 */ 544 if (ntohs(lacpdu->actor_port) != partner->port_number || 545 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 546 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 547 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 548 ntohs(lacpdu->actor_key) != partner->key || 549 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) { 550 port->sm_vars &= ~AD_PORT_SELECTED; 551 } 552 } 553 } 554 555 /** 556 * __update_default_selected - update a port's Selected variable from Partner 557 * @port: the port we're looking at 558 * 559 * This function updates the value of the selected variable, using the partner 560 * administrative parameter values. The administrative values are compared with 561 * the corresponding operational parameter values for the partner. If one or 562 * more of the comparisons shows that the administrative value(s) differ from 563 * the current operational values, then Selected is set to FALSE and 564 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 565 * Selected remains unchanged. 566 */ 567 static void __update_default_selected(struct port *port) 568 { 569 if (port) { 570 const struct port_params *admin = &port->partner_admin; 571 const struct port_params *oper = &port->partner_oper; 572 573 /* check if any parameter is different then 574 * update the state machine selected variable. 575 */ 576 if (admin->port_number != oper->port_number || 577 admin->port_priority != oper->port_priority || 578 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 579 admin->system_priority != oper->system_priority || 580 admin->key != oper->key || 581 (admin->port_state & LACP_STATE_AGGREGATION) 582 != (oper->port_state & LACP_STATE_AGGREGATION)) { 583 port->sm_vars &= ~AD_PORT_SELECTED; 584 } 585 } 586 } 587 588 /** 589 * __update_ntt - update a port's ntt variable from a received lacpdu 590 * @lacpdu: the lacpdu we've received 591 * @port: the port we're looking at 592 * 593 * Updates the value of the ntt variable, using parameter values from a newly 594 * received lacpdu. The parameter values for the partner carried in the 595 * received PDU are compared with the corresponding operational parameter 596 * values for the Actor. If one or more of the comparisons shows that the 597 * value(s) received in the PDU differ from the current operational values, 598 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 599 */ 600 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 601 { 602 /* validate lacpdu and port */ 603 if (lacpdu && port) { 604 /* check if any parameter is different then 605 * update the port->ntt. 606 */ 607 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 608 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 609 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 610 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 611 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 612 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) || 613 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) || 614 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) || 615 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION)) 616 ) { 617 port->ntt = true; 618 } 619 } 620 } 621 622 /** 623 * __agg_ports_are_ready - check if all ports in an aggregator are ready 624 * @aggregator: the aggregator we're looking at 625 * 626 */ 627 static int __agg_ports_are_ready(struct aggregator *aggregator) 628 { 629 struct port *port; 630 int retval = 1; 631 632 if (aggregator) { 633 /* scan all ports in this aggregator to verfy if they are 634 * all ready. 635 */ 636 for (port = aggregator->lag_ports; 637 port; 638 port = port->next_port_in_aggregator) { 639 if (!(port->sm_vars & AD_PORT_READY_N)) { 640 retval = 0; 641 break; 642 } 643 } 644 } 645 646 return retval; 647 } 648 649 /** 650 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 651 * @aggregator: the aggregator we're looking at 652 * @val: Should the ports' ready bit be set on or off 653 * 654 */ 655 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 656 { 657 struct port *port; 658 659 for (port = aggregator->lag_ports; port; 660 port = port->next_port_in_aggregator) { 661 if (val) 662 port->sm_vars |= AD_PORT_READY; 663 else 664 port->sm_vars &= ~AD_PORT_READY; 665 } 666 } 667 668 static int __agg_active_ports(struct aggregator *agg) 669 { 670 struct port *port; 671 int active = 0; 672 673 for (port = agg->lag_ports; port; 674 port = port->next_port_in_aggregator) { 675 if (port->is_enabled) 676 active++; 677 } 678 679 return active; 680 } 681 682 /** 683 * __get_agg_bandwidth - get the total bandwidth of an aggregator 684 * @aggregator: the aggregator we're looking at 685 * 686 */ 687 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 688 { 689 int nports = __agg_active_ports(aggregator); 690 u32 bandwidth = 0; 691 692 if (nports) { 693 switch (__get_link_speed(aggregator->lag_ports)) { 694 case AD_LINK_SPEED_1MBPS: 695 bandwidth = nports; 696 break; 697 case AD_LINK_SPEED_10MBPS: 698 bandwidth = nports * 10; 699 break; 700 case AD_LINK_SPEED_100MBPS: 701 bandwidth = nports * 100; 702 break; 703 case AD_LINK_SPEED_1000MBPS: 704 bandwidth = nports * 1000; 705 break; 706 case AD_LINK_SPEED_2500MBPS: 707 bandwidth = nports * 2500; 708 break; 709 case AD_LINK_SPEED_5000MBPS: 710 bandwidth = nports * 5000; 711 break; 712 case AD_LINK_SPEED_10000MBPS: 713 bandwidth = nports * 10000; 714 break; 715 case AD_LINK_SPEED_14000MBPS: 716 bandwidth = nports * 14000; 717 break; 718 case AD_LINK_SPEED_20000MBPS: 719 bandwidth = nports * 20000; 720 break; 721 case AD_LINK_SPEED_25000MBPS: 722 bandwidth = nports * 25000; 723 break; 724 case AD_LINK_SPEED_40000MBPS: 725 bandwidth = nports * 40000; 726 break; 727 case AD_LINK_SPEED_50000MBPS: 728 bandwidth = nports * 50000; 729 break; 730 case AD_LINK_SPEED_56000MBPS: 731 bandwidth = nports * 56000; 732 break; 733 case AD_LINK_SPEED_100000MBPS: 734 bandwidth = nports * 100000; 735 break; 736 default: 737 bandwidth = 0; /* to silence the compiler */ 738 } 739 } 740 return bandwidth; 741 } 742 743 /** 744 * __get_active_agg - get the current active aggregator 745 * @aggregator: the aggregator we're looking at 746 * 747 * Caller must hold RCU lock. 748 */ 749 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 750 { 751 struct bonding *bond = aggregator->slave->bond; 752 struct list_head *iter; 753 struct slave *slave; 754 755 bond_for_each_slave_rcu(bond, slave, iter) 756 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 757 return &(SLAVE_AD_INFO(slave)->aggregator); 758 759 return NULL; 760 } 761 762 /** 763 * __update_lacpdu_from_port - update a port's lacpdu fields 764 * @port: the port we're looking at 765 */ 766 static inline void __update_lacpdu_from_port(struct port *port) 767 { 768 struct lacpdu *lacpdu = &port->lacpdu; 769 const struct port_params *partner = &port->partner_oper; 770 771 /* update current actual Actor parameters 772 * lacpdu->subtype initialized 773 * lacpdu->version_number initialized 774 * lacpdu->tlv_type_actor_info initialized 775 * lacpdu->actor_information_length initialized 776 */ 777 778 lacpdu->actor_system_priority = htons(port->actor_system_priority); 779 lacpdu->actor_system = port->actor_system; 780 lacpdu->actor_key = htons(port->actor_oper_port_key); 781 lacpdu->actor_port_priority = htons(port->actor_port_priority); 782 lacpdu->actor_port = htons(port->actor_port_number); 783 lacpdu->actor_state = port->actor_oper_port_state; 784 slave_dbg(port->slave->bond->dev, port->slave->dev, 785 "update lacpdu: actor port state %x\n", 786 port->actor_oper_port_state); 787 788 /* lacpdu->reserved_3_1 initialized 789 * lacpdu->tlv_type_partner_info initialized 790 * lacpdu->partner_information_length initialized 791 */ 792 793 lacpdu->partner_system_priority = htons(partner->system_priority); 794 lacpdu->partner_system = partner->system; 795 lacpdu->partner_key = htons(partner->key); 796 lacpdu->partner_port_priority = htons(partner->port_priority); 797 lacpdu->partner_port = htons(partner->port_number); 798 lacpdu->partner_state = partner->port_state; 799 800 /* lacpdu->reserved_3_2 initialized 801 * lacpdu->tlv_type_collector_info initialized 802 * lacpdu->collector_information_length initialized 803 * collector_max_delay initialized 804 * reserved_12[12] initialized 805 * tlv_type_terminator initialized 806 * terminator_length initialized 807 * reserved_50[50] initialized 808 */ 809 } 810 811 /* ================= main 802.3ad protocol code ========================= */ 812 813 /** 814 * ad_lacpdu_send - send out a lacpdu packet on a given port 815 * @port: the port we're looking at 816 * 817 * Returns: 0 on success 818 * < 0 on error 819 */ 820 static int ad_lacpdu_send(struct port *port) 821 { 822 struct slave *slave = port->slave; 823 struct sk_buff *skb; 824 struct lacpdu_header *lacpdu_header; 825 int length = sizeof(struct lacpdu_header); 826 827 skb = dev_alloc_skb(length); 828 if (!skb) 829 return -ENOMEM; 830 831 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx); 832 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx); 833 834 skb->dev = slave->dev; 835 skb_reset_mac_header(skb); 836 skb->network_header = skb->mac_header + ETH_HLEN; 837 skb->protocol = PKT_TYPE_LACPDU; 838 skb->priority = TC_PRIO_CONTROL; 839 840 lacpdu_header = skb_put(skb, length); 841 842 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 843 /* Note: source address is set to be the member's PERMANENT address, 844 * because we use it to identify loopback lacpdus in receive. 845 */ 846 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 847 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 848 849 lacpdu_header->lacpdu = port->lacpdu; 850 851 dev_queue_xmit(skb); 852 853 return 0; 854 } 855 856 /** 857 * ad_marker_send - send marker information/response on a given port 858 * @port: the port we're looking at 859 * @marker: marker data to send 860 * 861 * Returns: 0 on success 862 * < 0 on error 863 */ 864 static int ad_marker_send(struct port *port, struct bond_marker *marker) 865 { 866 struct slave *slave = port->slave; 867 struct sk_buff *skb; 868 struct bond_marker_header *marker_header; 869 int length = sizeof(struct bond_marker_header); 870 871 skb = dev_alloc_skb(length + 16); 872 if (!skb) 873 return -ENOMEM; 874 875 switch (marker->tlv_type) { 876 case AD_MARKER_INFORMATION_SUBTYPE: 877 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx); 878 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx); 879 break; 880 case AD_MARKER_RESPONSE_SUBTYPE: 881 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx); 882 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx); 883 break; 884 } 885 886 skb_reserve(skb, 16); 887 888 skb->dev = slave->dev; 889 skb_reset_mac_header(skb); 890 skb->network_header = skb->mac_header + ETH_HLEN; 891 skb->protocol = PKT_TYPE_LACPDU; 892 893 marker_header = skb_put(skb, length); 894 895 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 896 /* Note: source address is set to be the member's PERMANENT address, 897 * because we use it to identify loopback MARKERs in receive. 898 */ 899 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 900 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 901 902 marker_header->marker = *marker; 903 904 dev_queue_xmit(skb); 905 906 return 0; 907 } 908 909 /** 910 * ad_mux_machine - handle a port's mux state machine 911 * @port: the port we're looking at 912 * @update_slave_arr: Does slave array need update? 913 */ 914 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 915 { 916 mux_states_t last_state; 917 918 /* keep current State Machine state to compare later if it was 919 * changed 920 */ 921 last_state = port->sm_mux_state; 922 923 if (port->sm_vars & AD_PORT_BEGIN) { 924 port->sm_mux_state = AD_MUX_DETACHED; 925 } else { 926 switch (port->sm_mux_state) { 927 case AD_MUX_DETACHED: 928 if ((port->sm_vars & AD_PORT_SELECTED) 929 || (port->sm_vars & AD_PORT_STANDBY)) 930 /* if SELECTED or STANDBY */ 931 port->sm_mux_state = AD_MUX_WAITING; 932 break; 933 case AD_MUX_WAITING: 934 /* if SELECTED == FALSE return to DETACH state */ 935 if (!(port->sm_vars & AD_PORT_SELECTED)) { 936 port->sm_vars &= ~AD_PORT_READY_N; 937 /* in order to withhold the Selection Logic to 938 * check all ports READY_N value every callback 939 * cycle to update ready variable, we check 940 * READY_N and update READY here 941 */ 942 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 943 port->sm_mux_state = AD_MUX_DETACHED; 944 break; 945 } 946 947 /* check if the wait_while_timer expired */ 948 if (port->sm_mux_timer_counter 949 && !(--port->sm_mux_timer_counter)) 950 port->sm_vars |= AD_PORT_READY_N; 951 952 /* in order to withhold the selection logic to check 953 * all ports READY_N value every callback cycle to 954 * update ready variable, we check READY_N and update 955 * READY here 956 */ 957 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 958 959 /* if the wait_while_timer expired, and the port is 960 * in READY state, move to ATTACHED state 961 */ 962 if ((port->sm_vars & AD_PORT_READY) 963 && !port->sm_mux_timer_counter) 964 port->sm_mux_state = AD_MUX_ATTACHED; 965 break; 966 case AD_MUX_ATTACHED: 967 /* check also if agg_select_timer expired (so the 968 * edable port will take place only after this timer) 969 */ 970 if ((port->sm_vars & AD_PORT_SELECTED) && 971 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) && 972 !__check_agg_selection_timer(port)) { 973 if (port->aggregator->is_active) 974 port->sm_mux_state = 975 AD_MUX_COLLECTING_DISTRIBUTING; 976 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 977 (port->sm_vars & AD_PORT_STANDBY)) { 978 /* if UNSELECTED or STANDBY */ 979 port->sm_vars &= ~AD_PORT_READY_N; 980 /* in order to withhold the selection logic to 981 * check all ports READY_N value every callback 982 * cycle to update ready variable, we check 983 * READY_N and update READY here 984 */ 985 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 986 port->sm_mux_state = AD_MUX_DETACHED; 987 } else if (port->aggregator->is_active) { 988 port->actor_oper_port_state |= 989 LACP_STATE_SYNCHRONIZATION; 990 } 991 break; 992 case AD_MUX_COLLECTING_DISTRIBUTING: 993 if (!(port->sm_vars & AD_PORT_SELECTED) || 994 (port->sm_vars & AD_PORT_STANDBY) || 995 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) || 996 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) { 997 port->sm_mux_state = AD_MUX_ATTACHED; 998 } else { 999 /* if port state hasn't changed make 1000 * sure that a collecting distributing 1001 * port in an active aggregator is enabled 1002 */ 1003 if (port->aggregator && 1004 port->aggregator->is_active && 1005 !__port_is_enabled(port)) { 1006 1007 __enable_port(port); 1008 } 1009 } 1010 break; 1011 default: 1012 break; 1013 } 1014 } 1015 1016 /* check if the state machine was changed */ 1017 if (port->sm_mux_state != last_state) { 1018 slave_dbg(port->slave->bond->dev, port->slave->dev, 1019 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 1020 port->actor_port_number, 1021 last_state, 1022 port->sm_mux_state); 1023 switch (port->sm_mux_state) { 1024 case AD_MUX_DETACHED: 1025 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1026 ad_disable_collecting_distributing(port, 1027 update_slave_arr); 1028 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1029 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1030 port->ntt = true; 1031 break; 1032 case AD_MUX_WAITING: 1033 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1034 break; 1035 case AD_MUX_ATTACHED: 1036 if (port->aggregator->is_active) 1037 port->actor_oper_port_state |= 1038 LACP_STATE_SYNCHRONIZATION; 1039 else 1040 port->actor_oper_port_state &= 1041 ~LACP_STATE_SYNCHRONIZATION; 1042 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1043 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1044 ad_disable_collecting_distributing(port, 1045 update_slave_arr); 1046 port->ntt = true; 1047 break; 1048 case AD_MUX_COLLECTING_DISTRIBUTING: 1049 port->actor_oper_port_state |= LACP_STATE_COLLECTING; 1050 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING; 1051 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; 1052 ad_enable_collecting_distributing(port, 1053 update_slave_arr); 1054 port->ntt = true; 1055 break; 1056 default: 1057 break; 1058 } 1059 } 1060 } 1061 1062 /** 1063 * ad_rx_machine - handle a port's rx State Machine 1064 * @lacpdu: the lacpdu we've received 1065 * @port: the port we're looking at 1066 * 1067 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1068 * CURRENT. If timer expired set the state machine in the proper state. 1069 * In other cases, this function checks if we need to switch to other state. 1070 */ 1071 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1072 { 1073 rx_states_t last_state; 1074 1075 /* keep current State Machine state to compare later if it was 1076 * changed 1077 */ 1078 last_state = port->sm_rx_state; 1079 1080 if (lacpdu) { 1081 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx); 1082 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx); 1083 } 1084 /* check if state machine should change state */ 1085 1086 /* first, check if port was reinitialized */ 1087 if (port->sm_vars & AD_PORT_BEGIN) { 1088 port->sm_rx_state = AD_RX_INITIALIZE; 1089 port->sm_vars |= AD_PORT_CHURNED; 1090 /* check if port is not enabled */ 1091 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1092 port->sm_rx_state = AD_RX_PORT_DISABLED; 1093 /* check if new lacpdu arrived */ 1094 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1095 (port->sm_rx_state == AD_RX_DEFAULTED) || 1096 (port->sm_rx_state == AD_RX_CURRENT))) { 1097 if (port->sm_rx_state != AD_RX_CURRENT) 1098 port->sm_vars |= AD_PORT_CHURNED; 1099 port->sm_rx_timer_counter = 0; 1100 port->sm_rx_state = AD_RX_CURRENT; 1101 } else { 1102 /* if timer is on, and if it is expired */ 1103 if (port->sm_rx_timer_counter && 1104 !(--port->sm_rx_timer_counter)) { 1105 switch (port->sm_rx_state) { 1106 case AD_RX_EXPIRED: 1107 port->sm_rx_state = AD_RX_DEFAULTED; 1108 break; 1109 case AD_RX_CURRENT: 1110 port->sm_rx_state = AD_RX_EXPIRED; 1111 break; 1112 default: 1113 break; 1114 } 1115 } else { 1116 /* if no lacpdu arrived and no timer is on */ 1117 switch (port->sm_rx_state) { 1118 case AD_RX_PORT_DISABLED: 1119 if (port->is_enabled && 1120 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1121 port->sm_rx_state = AD_RX_EXPIRED; 1122 else if (port->is_enabled 1123 && ((port->sm_vars 1124 & AD_PORT_LACP_ENABLED) == 0)) 1125 port->sm_rx_state = AD_RX_LACP_DISABLED; 1126 break; 1127 default: 1128 break; 1129 1130 } 1131 } 1132 } 1133 1134 /* check if the State machine was changed or new lacpdu arrived */ 1135 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1136 slave_dbg(port->slave->bond->dev, port->slave->dev, 1137 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1138 port->actor_port_number, 1139 last_state, 1140 port->sm_rx_state); 1141 switch (port->sm_rx_state) { 1142 case AD_RX_INITIALIZE: 1143 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1144 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1145 else 1146 port->sm_vars |= AD_PORT_LACP_ENABLED; 1147 port->sm_vars &= ~AD_PORT_SELECTED; 1148 __record_default(port); 1149 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1150 port->sm_rx_state = AD_RX_PORT_DISABLED; 1151 1152 /* Fall Through */ 1153 case AD_RX_PORT_DISABLED: 1154 port->sm_vars &= ~AD_PORT_MATCHED; 1155 break; 1156 case AD_RX_LACP_DISABLED: 1157 port->sm_vars &= ~AD_PORT_SELECTED; 1158 __record_default(port); 1159 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION; 1160 port->sm_vars |= AD_PORT_MATCHED; 1161 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1162 break; 1163 case AD_RX_EXPIRED: 1164 /* Reset of the Synchronization flag (Standard 43.4.12) 1165 * This reset cause to disable this port in the 1166 * COLLECTING_DISTRIBUTING state of the mux machine in 1167 * case of EXPIRED even if LINK_DOWN didn't arrive for 1168 * the port. 1169 */ 1170 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION; 1171 port->sm_vars &= ~AD_PORT_MATCHED; 1172 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT; 1173 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY; 1174 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1175 port->actor_oper_port_state |= LACP_STATE_EXPIRED; 1176 port->sm_vars |= AD_PORT_CHURNED; 1177 break; 1178 case AD_RX_DEFAULTED: 1179 __update_default_selected(port); 1180 __record_default(port); 1181 port->sm_vars |= AD_PORT_MATCHED; 1182 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1183 break; 1184 case AD_RX_CURRENT: 1185 /* detect loopback situation */ 1186 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1187 &(port->actor_system))) { 1188 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n" 1189 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n"); 1190 return; 1191 } 1192 __update_selected(lacpdu, port); 1193 __update_ntt(lacpdu, port); 1194 __record_pdu(lacpdu, port); 1195 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)); 1196 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1197 break; 1198 default: 1199 break; 1200 } 1201 } 1202 } 1203 1204 /** 1205 * ad_churn_machine - handle port churn's state machine 1206 * @port: the port we're looking at 1207 * 1208 */ 1209 static void ad_churn_machine(struct port *port) 1210 { 1211 if (port->sm_vars & AD_PORT_CHURNED) { 1212 port->sm_vars &= ~AD_PORT_CHURNED; 1213 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1214 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1215 port->sm_churn_actor_timer_counter = 1216 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1217 port->sm_churn_partner_timer_counter = 1218 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1219 return; 1220 } 1221 if (port->sm_churn_actor_timer_counter && 1222 !(--port->sm_churn_actor_timer_counter) && 1223 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1224 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) { 1225 port->sm_churn_actor_state = AD_NO_CHURN; 1226 } else { 1227 port->churn_actor_count++; 1228 port->sm_churn_actor_state = AD_CHURN; 1229 } 1230 } 1231 if (port->sm_churn_partner_timer_counter && 1232 !(--port->sm_churn_partner_timer_counter) && 1233 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1234 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) { 1235 port->sm_churn_partner_state = AD_NO_CHURN; 1236 } else { 1237 port->churn_partner_count++; 1238 port->sm_churn_partner_state = AD_CHURN; 1239 } 1240 } 1241 } 1242 1243 /** 1244 * ad_tx_machine - handle a port's tx state machine 1245 * @port: the port we're looking at 1246 */ 1247 static void ad_tx_machine(struct port *port) 1248 { 1249 /* check if tx timer expired, to verify that we do not send more than 1250 * 3 packets per second 1251 */ 1252 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1253 /* check if there is something to send */ 1254 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1255 __update_lacpdu_from_port(port); 1256 1257 if (ad_lacpdu_send(port) >= 0) { 1258 slave_dbg(port->slave->bond->dev, 1259 port->slave->dev, 1260 "Sent LACPDU on port %d\n", 1261 port->actor_port_number); 1262 1263 /* mark ntt as false, so it will not be sent 1264 * again until demanded 1265 */ 1266 port->ntt = false; 1267 } 1268 } 1269 /* restart tx timer(to verify that we will not exceed 1270 * AD_MAX_TX_IN_SECOND 1271 */ 1272 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1273 } 1274 } 1275 1276 /** 1277 * ad_periodic_machine - handle a port's periodic state machine 1278 * @port: the port we're looking at 1279 * 1280 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1281 */ 1282 static void ad_periodic_machine(struct port *port) 1283 { 1284 periodic_states_t last_state; 1285 1286 /* keep current state machine state to compare later if it was changed */ 1287 last_state = port->sm_periodic_state; 1288 1289 /* check if port was reinitialized */ 1290 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1291 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) 1292 ) { 1293 port->sm_periodic_state = AD_NO_PERIODIC; 1294 } 1295 /* check if state machine should change state */ 1296 else if (port->sm_periodic_timer_counter) { 1297 /* check if periodic state machine expired */ 1298 if (!(--port->sm_periodic_timer_counter)) { 1299 /* if expired then do tx */ 1300 port->sm_periodic_state = AD_PERIODIC_TX; 1301 } else { 1302 /* If not expired, check if there is some new timeout 1303 * parameter from the partner state 1304 */ 1305 switch (port->sm_periodic_state) { 1306 case AD_FAST_PERIODIC: 1307 if (!(port->partner_oper.port_state 1308 & LACP_STATE_LACP_TIMEOUT)) 1309 port->sm_periodic_state = AD_SLOW_PERIODIC; 1310 break; 1311 case AD_SLOW_PERIODIC: 1312 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) { 1313 port->sm_periodic_timer_counter = 0; 1314 port->sm_periodic_state = AD_PERIODIC_TX; 1315 } 1316 break; 1317 default: 1318 break; 1319 } 1320 } 1321 } else { 1322 switch (port->sm_periodic_state) { 1323 case AD_NO_PERIODIC: 1324 port->sm_periodic_state = AD_FAST_PERIODIC; 1325 break; 1326 case AD_PERIODIC_TX: 1327 if (!(port->partner_oper.port_state & 1328 LACP_STATE_LACP_TIMEOUT)) 1329 port->sm_periodic_state = AD_SLOW_PERIODIC; 1330 else 1331 port->sm_periodic_state = AD_FAST_PERIODIC; 1332 break; 1333 default: 1334 break; 1335 } 1336 } 1337 1338 /* check if the state machine was changed */ 1339 if (port->sm_periodic_state != last_state) { 1340 slave_dbg(port->slave->bond->dev, port->slave->dev, 1341 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1342 port->actor_port_number, last_state, 1343 port->sm_periodic_state); 1344 switch (port->sm_periodic_state) { 1345 case AD_NO_PERIODIC: 1346 port->sm_periodic_timer_counter = 0; 1347 break; 1348 case AD_FAST_PERIODIC: 1349 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1350 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1351 break; 1352 case AD_SLOW_PERIODIC: 1353 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1354 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1355 break; 1356 case AD_PERIODIC_TX: 1357 port->ntt = true; 1358 break; 1359 default: 1360 break; 1361 } 1362 } 1363 } 1364 1365 /** 1366 * ad_port_selection_logic - select aggregation groups 1367 * @port: the port we're looking at 1368 * @update_slave_arr: Does slave array need update? 1369 * 1370 * Select aggregation groups, and assign each port for it's aggregetor. The 1371 * selection logic is called in the inititalization (after all the handshkes), 1372 * and after every lacpdu receive (if selected is off). 1373 */ 1374 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1375 { 1376 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1377 struct port *last_port = NULL, *curr_port; 1378 struct list_head *iter; 1379 struct bonding *bond; 1380 struct slave *slave; 1381 int found = 0; 1382 1383 /* if the port is already Selected, do nothing */ 1384 if (port->sm_vars & AD_PORT_SELECTED) 1385 return; 1386 1387 bond = __get_bond_by_port(port); 1388 1389 /* if the port is connected to other aggregator, detach it */ 1390 if (port->aggregator) { 1391 /* detach the port from its former aggregator */ 1392 temp_aggregator = port->aggregator; 1393 for (curr_port = temp_aggregator->lag_ports; curr_port; 1394 last_port = curr_port, 1395 curr_port = curr_port->next_port_in_aggregator) { 1396 if (curr_port == port) { 1397 temp_aggregator->num_of_ports--; 1398 /* if it is the first port attached to the 1399 * aggregator 1400 */ 1401 if (!last_port) { 1402 temp_aggregator->lag_ports = 1403 port->next_port_in_aggregator; 1404 } else { 1405 /* not the first port attached to the 1406 * aggregator 1407 */ 1408 last_port->next_port_in_aggregator = 1409 port->next_port_in_aggregator; 1410 } 1411 1412 /* clear the port's relations to this 1413 * aggregator 1414 */ 1415 port->aggregator = NULL; 1416 port->next_port_in_aggregator = NULL; 1417 port->actor_port_aggregator_identifier = 0; 1418 1419 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n", 1420 port->actor_port_number, 1421 temp_aggregator->aggregator_identifier); 1422 /* if the aggregator is empty, clear its 1423 * parameters, and set it ready to be attached 1424 */ 1425 if (!temp_aggregator->lag_ports) 1426 ad_clear_agg(temp_aggregator); 1427 break; 1428 } 1429 } 1430 if (!curr_port) { 1431 /* meaning: the port was related to an aggregator 1432 * but was not on the aggregator port list 1433 */ 1434 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n", 1435 port->slave->bond->dev->name, 1436 port->slave->dev->name, 1437 port->actor_port_number, 1438 port->aggregator->aggregator_identifier); 1439 } 1440 } 1441 /* search on all aggregators for a suitable aggregator for this port */ 1442 bond_for_each_slave(bond, slave, iter) { 1443 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1444 1445 /* keep a free aggregator for later use(if needed) */ 1446 if (!aggregator->lag_ports) { 1447 if (!free_aggregator) 1448 free_aggregator = aggregator; 1449 continue; 1450 } 1451 /* check if current aggregator suits us */ 1452 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1453 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1454 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1455 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1456 ) && 1457 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1458 !aggregator->is_individual) /* but is not individual OR */ 1459 ) 1460 ) { 1461 /* attach to the founded aggregator */ 1462 port->aggregator = aggregator; 1463 port->actor_port_aggregator_identifier = 1464 port->aggregator->aggregator_identifier; 1465 port->next_port_in_aggregator = aggregator->lag_ports; 1466 port->aggregator->num_of_ports++; 1467 aggregator->lag_ports = port; 1468 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n", 1469 port->actor_port_number, 1470 port->aggregator->aggregator_identifier); 1471 1472 /* mark this port as selected */ 1473 port->sm_vars |= AD_PORT_SELECTED; 1474 found = 1; 1475 break; 1476 } 1477 } 1478 1479 /* the port couldn't find an aggregator - attach it to a new 1480 * aggregator 1481 */ 1482 if (!found) { 1483 if (free_aggregator) { 1484 /* assign port a new aggregator */ 1485 port->aggregator = free_aggregator; 1486 port->actor_port_aggregator_identifier = 1487 port->aggregator->aggregator_identifier; 1488 1489 /* update the new aggregator's parameters 1490 * if port was responsed from the end-user 1491 */ 1492 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1493 /* if port is full duplex */ 1494 port->aggregator->is_individual = false; 1495 else 1496 port->aggregator->is_individual = true; 1497 1498 port->aggregator->actor_admin_aggregator_key = 1499 port->actor_admin_port_key; 1500 port->aggregator->actor_oper_aggregator_key = 1501 port->actor_oper_port_key; 1502 port->aggregator->partner_system = 1503 port->partner_oper.system; 1504 port->aggregator->partner_system_priority = 1505 port->partner_oper.system_priority; 1506 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1507 port->aggregator->receive_state = 1; 1508 port->aggregator->transmit_state = 1; 1509 port->aggregator->lag_ports = port; 1510 port->aggregator->num_of_ports++; 1511 1512 /* mark this port as selected */ 1513 port->sm_vars |= AD_PORT_SELECTED; 1514 1515 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n", 1516 port->actor_port_number, 1517 port->aggregator->aggregator_identifier); 1518 } else { 1519 slave_err(bond->dev, port->slave->dev, 1520 "Port %d did not find a suitable aggregator\n", 1521 port->actor_port_number); 1522 } 1523 } 1524 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1525 * in all aggregator's ports, else set ready=FALSE in all 1526 * aggregator's ports 1527 */ 1528 __set_agg_ports_ready(port->aggregator, 1529 __agg_ports_are_ready(port->aggregator)); 1530 1531 aggregator = __get_first_agg(port); 1532 ad_agg_selection_logic(aggregator, update_slave_arr); 1533 1534 if (!port->aggregator->is_active) 1535 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1536 } 1537 1538 /* Decide if "agg" is a better choice for the new active aggregator that 1539 * the current best, according to the ad_select policy. 1540 */ 1541 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1542 struct aggregator *curr) 1543 { 1544 /* 0. If no best, select current. 1545 * 1546 * 1. If the current agg is not individual, and the best is 1547 * individual, select current. 1548 * 1549 * 2. If current agg is individual and the best is not, keep best. 1550 * 1551 * 3. Therefore, current and best are both individual or both not 1552 * individual, so: 1553 * 1554 * 3a. If current agg partner replied, and best agg partner did not, 1555 * select current. 1556 * 1557 * 3b. If current agg partner did not reply and best agg partner 1558 * did reply, keep best. 1559 * 1560 * 4. Therefore, current and best both have partner replies or 1561 * both do not, so perform selection policy: 1562 * 1563 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1564 * select by bandwidth. 1565 * 1566 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1567 */ 1568 if (!best) 1569 return curr; 1570 1571 if (!curr->is_individual && best->is_individual) 1572 return curr; 1573 1574 if (curr->is_individual && !best->is_individual) 1575 return best; 1576 1577 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1578 return curr; 1579 1580 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1581 return best; 1582 1583 switch (__get_agg_selection_mode(curr->lag_ports)) { 1584 case BOND_AD_COUNT: 1585 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1586 return curr; 1587 1588 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1589 return best; 1590 1591 /*FALLTHROUGH*/ 1592 case BOND_AD_STABLE: 1593 case BOND_AD_BANDWIDTH: 1594 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1595 return curr; 1596 1597 break; 1598 1599 default: 1600 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n", 1601 curr->slave->bond->dev->name, 1602 curr->slave->dev->name, 1603 __get_agg_selection_mode(curr->lag_ports)); 1604 break; 1605 } 1606 1607 return best; 1608 } 1609 1610 static int agg_device_up(const struct aggregator *agg) 1611 { 1612 struct port *port = agg->lag_ports; 1613 1614 if (!port) 1615 return 0; 1616 1617 for (port = agg->lag_ports; port; 1618 port = port->next_port_in_aggregator) { 1619 if (netif_running(port->slave->dev) && 1620 netif_carrier_ok(port->slave->dev)) 1621 return 1; 1622 } 1623 1624 return 0; 1625 } 1626 1627 /** 1628 * ad_agg_selection_logic - select an aggregation group for a team 1629 * @aggregator: the aggregator we're looking at 1630 * @update_slave_arr: Does slave array need update? 1631 * 1632 * It is assumed that only one aggregator may be selected for a team. 1633 * 1634 * The logic of this function is to select the aggregator according to 1635 * the ad_select policy: 1636 * 1637 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1638 * it, and to reselect the active aggregator only if the previous 1639 * aggregator has no more ports related to it. 1640 * 1641 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1642 * bandwidth, and reselect whenever a link state change takes place or the 1643 * set of slaves in the bond changes. 1644 * 1645 * BOND_AD_COUNT: select the aggregator with largest number of ports 1646 * (slaves), and reselect whenever a link state change takes place or the 1647 * set of slaves in the bond changes. 1648 * 1649 * FIXME: this function MUST be called with the first agg in the bond, or 1650 * __get_active_agg() won't work correctly. This function should be better 1651 * called with the bond itself, and retrieve the first agg from it. 1652 */ 1653 static void ad_agg_selection_logic(struct aggregator *agg, 1654 bool *update_slave_arr) 1655 { 1656 struct aggregator *best, *active, *origin; 1657 struct bonding *bond = agg->slave->bond; 1658 struct list_head *iter; 1659 struct slave *slave; 1660 struct port *port; 1661 1662 rcu_read_lock(); 1663 origin = agg; 1664 active = __get_active_agg(agg); 1665 best = (active && agg_device_up(active)) ? active : NULL; 1666 1667 bond_for_each_slave_rcu(bond, slave, iter) { 1668 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1669 1670 agg->is_active = 0; 1671 1672 if (__agg_active_ports(agg) && agg_device_up(agg)) 1673 best = ad_agg_selection_test(best, agg); 1674 } 1675 1676 if (best && 1677 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1678 /* For the STABLE policy, don't replace the old active 1679 * aggregator if it's still active (it has an answering 1680 * partner) or if both the best and active don't have an 1681 * answering partner. 1682 */ 1683 if (active && active->lag_ports && 1684 __agg_active_ports(active) && 1685 (__agg_has_partner(active) || 1686 (!__agg_has_partner(active) && 1687 !__agg_has_partner(best)))) { 1688 if (!(!active->actor_oper_aggregator_key && 1689 best->actor_oper_aggregator_key)) { 1690 best = NULL; 1691 active->is_active = 1; 1692 } 1693 } 1694 } 1695 1696 if (best && (best == active)) { 1697 best = NULL; 1698 active->is_active = 1; 1699 } 1700 1701 /* if there is new best aggregator, activate it */ 1702 if (best) { 1703 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1704 best->slave ? best->slave->dev->name : "NULL", 1705 best->aggregator_identifier, best->num_of_ports, 1706 best->actor_oper_aggregator_key, 1707 best->partner_oper_aggregator_key, 1708 best->is_individual, best->is_active); 1709 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n", 1710 best->slave ? best->slave->dev->name : "NULL", 1711 best->lag_ports, best->slave); 1712 1713 bond_for_each_slave_rcu(bond, slave, iter) { 1714 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1715 1716 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1717 agg->aggregator_identifier, agg->num_of_ports, 1718 agg->actor_oper_aggregator_key, 1719 agg->partner_oper_aggregator_key, 1720 agg->is_individual, agg->is_active); 1721 } 1722 1723 /* check if any partner replies */ 1724 if (best->is_individual) 1725 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1726 bond->dev->name); 1727 1728 best->is_active = 1; 1729 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n", 1730 best->slave ? best->slave->dev->name : "NULL", 1731 best->aggregator_identifier); 1732 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1733 best->slave ? best->slave->dev->name : "NULL", 1734 best->aggregator_identifier, best->num_of_ports, 1735 best->actor_oper_aggregator_key, 1736 best->partner_oper_aggregator_key, 1737 best->is_individual, best->is_active); 1738 1739 /* disable the ports that were related to the former 1740 * active_aggregator 1741 */ 1742 if (active) { 1743 for (port = active->lag_ports; port; 1744 port = port->next_port_in_aggregator) { 1745 __disable_port(port); 1746 } 1747 } 1748 /* Slave array needs update. */ 1749 *update_slave_arr = true; 1750 } 1751 1752 /* if the selected aggregator is of join individuals 1753 * (partner_system is NULL), enable their ports 1754 */ 1755 active = __get_active_agg(origin); 1756 1757 if (active) { 1758 if (!__agg_has_partner(active)) { 1759 for (port = active->lag_ports; port; 1760 port = port->next_port_in_aggregator) { 1761 __enable_port(port); 1762 } 1763 } 1764 } 1765 1766 rcu_read_unlock(); 1767 1768 bond_3ad_set_carrier(bond); 1769 } 1770 1771 /** 1772 * ad_clear_agg - clear a given aggregator's parameters 1773 * @aggregator: the aggregator we're looking at 1774 */ 1775 static void ad_clear_agg(struct aggregator *aggregator) 1776 { 1777 if (aggregator) { 1778 aggregator->is_individual = false; 1779 aggregator->actor_admin_aggregator_key = 0; 1780 aggregator->actor_oper_aggregator_key = 0; 1781 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1782 aggregator->partner_system_priority = 0; 1783 aggregator->partner_oper_aggregator_key = 0; 1784 aggregator->receive_state = 0; 1785 aggregator->transmit_state = 0; 1786 aggregator->lag_ports = NULL; 1787 aggregator->is_active = 0; 1788 aggregator->num_of_ports = 0; 1789 pr_debug("%s: LAG %d was cleared\n", 1790 aggregator->slave ? 1791 aggregator->slave->dev->name : "NULL", 1792 aggregator->aggregator_identifier); 1793 } 1794 } 1795 1796 /** 1797 * ad_initialize_agg - initialize a given aggregator's parameters 1798 * @aggregator: the aggregator we're looking at 1799 */ 1800 static void ad_initialize_agg(struct aggregator *aggregator) 1801 { 1802 if (aggregator) { 1803 ad_clear_agg(aggregator); 1804 1805 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1806 aggregator->aggregator_identifier = 0; 1807 aggregator->slave = NULL; 1808 } 1809 } 1810 1811 /** 1812 * ad_initialize_port - initialize a given port's parameters 1813 * @aggregator: the aggregator we're looking at 1814 * @lacp_fast: boolean. whether fast periodic should be used 1815 */ 1816 static void ad_initialize_port(struct port *port, int lacp_fast) 1817 { 1818 static const struct port_params tmpl = { 1819 .system_priority = 0xffff, 1820 .key = 1, 1821 .port_number = 1, 1822 .port_priority = 0xff, 1823 .port_state = 1, 1824 }; 1825 static const struct lacpdu lacpdu = { 1826 .subtype = 0x01, 1827 .version_number = 0x01, 1828 .tlv_type_actor_info = 0x01, 1829 .actor_information_length = 0x14, 1830 .tlv_type_partner_info = 0x02, 1831 .partner_information_length = 0x14, 1832 .tlv_type_collector_info = 0x03, 1833 .collector_information_length = 0x10, 1834 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1835 }; 1836 1837 if (port) { 1838 port->actor_port_priority = 0xff; 1839 port->actor_port_aggregator_identifier = 0; 1840 port->ntt = false; 1841 port->actor_admin_port_state = LACP_STATE_AGGREGATION | 1842 LACP_STATE_LACP_ACTIVITY; 1843 port->actor_oper_port_state = LACP_STATE_AGGREGATION | 1844 LACP_STATE_LACP_ACTIVITY; 1845 1846 if (lacp_fast) 1847 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 1848 1849 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1850 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1851 1852 port->is_enabled = true; 1853 /* private parameters */ 1854 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1855 port->sm_rx_state = 0; 1856 port->sm_rx_timer_counter = 0; 1857 port->sm_periodic_state = 0; 1858 port->sm_periodic_timer_counter = 0; 1859 port->sm_mux_state = 0; 1860 port->sm_mux_timer_counter = 0; 1861 port->sm_tx_state = 0; 1862 port->aggregator = NULL; 1863 port->next_port_in_aggregator = NULL; 1864 port->transaction_id = 0; 1865 1866 port->sm_churn_actor_timer_counter = 0; 1867 port->sm_churn_actor_state = 0; 1868 port->churn_actor_count = 0; 1869 port->sm_churn_partner_timer_counter = 0; 1870 port->sm_churn_partner_state = 0; 1871 port->churn_partner_count = 0; 1872 1873 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1874 } 1875 } 1876 1877 /** 1878 * ad_enable_collecting_distributing - enable a port's transmit/receive 1879 * @port: the port we're looking at 1880 * @update_slave_arr: Does slave array need update? 1881 * 1882 * Enable @port if it's in an active aggregator 1883 */ 1884 static void ad_enable_collecting_distributing(struct port *port, 1885 bool *update_slave_arr) 1886 { 1887 if (port->aggregator->is_active) { 1888 slave_dbg(port->slave->bond->dev, port->slave->dev, 1889 "Enabling port %d (LAG %d)\n", 1890 port->actor_port_number, 1891 port->aggregator->aggregator_identifier); 1892 __enable_port(port); 1893 /* Slave array needs update */ 1894 *update_slave_arr = true; 1895 } 1896 } 1897 1898 /** 1899 * ad_disable_collecting_distributing - disable a port's transmit/receive 1900 * @port: the port we're looking at 1901 * @update_slave_arr: Does slave array need update? 1902 */ 1903 static void ad_disable_collecting_distributing(struct port *port, 1904 bool *update_slave_arr) 1905 { 1906 if (port->aggregator && 1907 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1908 &(null_mac_addr))) { 1909 slave_dbg(port->slave->bond->dev, port->slave->dev, 1910 "Disabling port %d (LAG %d)\n", 1911 port->actor_port_number, 1912 port->aggregator->aggregator_identifier); 1913 __disable_port(port); 1914 /* Slave array needs an update */ 1915 *update_slave_arr = true; 1916 } 1917 } 1918 1919 /** 1920 * ad_marker_info_received - handle receive of a Marker information frame 1921 * @marker_info: Marker info received 1922 * @port: the port we're looking at 1923 */ 1924 static void ad_marker_info_received(struct bond_marker *marker_info, 1925 struct port *port) 1926 { 1927 struct bond_marker marker; 1928 1929 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx); 1930 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx); 1931 1932 /* copy the received marker data to the response marker */ 1933 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1934 /* change the marker subtype to marker response */ 1935 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1936 1937 /* send the marker response */ 1938 if (ad_marker_send(port, &marker) >= 0) 1939 slave_dbg(port->slave->bond->dev, port->slave->dev, 1940 "Sent Marker Response on port %d\n", 1941 port->actor_port_number); 1942 } 1943 1944 /** 1945 * ad_marker_response_received - handle receive of a marker response frame 1946 * @marker: marker PDU received 1947 * @port: the port we're looking at 1948 * 1949 * This function does nothing since we decided not to implement send and handle 1950 * response for marker PDU's, in this stage, but only to respond to marker 1951 * information. 1952 */ 1953 static void ad_marker_response_received(struct bond_marker *marker, 1954 struct port *port) 1955 { 1956 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx); 1957 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx); 1958 1959 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1960 } 1961 1962 /* ========= AD exported functions to the main bonding code ========= */ 1963 1964 /* Check aggregators status in team every T seconds */ 1965 #define AD_AGGREGATOR_SELECTION_TIMER 8 1966 1967 /** 1968 * bond_3ad_initiate_agg_selection - initate aggregator selection 1969 * @bond: bonding struct 1970 * 1971 * Set the aggregation selection timer, to initiate an agg selection in 1972 * the very near future. Called during first initialization, and during 1973 * any down to up transitions of the bond. 1974 */ 1975 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1976 { 1977 BOND_AD_INFO(bond).agg_select_timer = timeout; 1978 } 1979 1980 /** 1981 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1982 * @bond: bonding struct to work on 1983 * @tick_resolution: tick duration (millisecond resolution) 1984 * 1985 * Can be called only after the mac address of the bond is set. 1986 */ 1987 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1988 { 1989 /* check that the bond is not initialized yet */ 1990 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1991 bond->dev->dev_addr)) { 1992 1993 BOND_AD_INFO(bond).aggregator_identifier = 0; 1994 1995 BOND_AD_INFO(bond).system.sys_priority = 1996 bond->params.ad_actor_sys_prio; 1997 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1998 BOND_AD_INFO(bond).system.sys_mac_addr = 1999 *((struct mac_addr *)bond->dev->dev_addr); 2000 else 2001 BOND_AD_INFO(bond).system.sys_mac_addr = 2002 *((struct mac_addr *)bond->params.ad_actor_system); 2003 2004 /* initialize how many times this module is called in one 2005 * second (should be about every 100ms) 2006 */ 2007 ad_ticks_per_sec = tick_resolution; 2008 2009 bond_3ad_initiate_agg_selection(bond, 2010 AD_AGGREGATOR_SELECTION_TIMER * 2011 ad_ticks_per_sec); 2012 } 2013 } 2014 2015 /** 2016 * bond_3ad_bind_slave - initialize a slave's port 2017 * @slave: slave struct to work on 2018 * 2019 * Returns: 0 on success 2020 * < 0 on error 2021 */ 2022 void bond_3ad_bind_slave(struct slave *slave) 2023 { 2024 struct bonding *bond = bond_get_bond_by_slave(slave); 2025 struct port *port; 2026 struct aggregator *aggregator; 2027 2028 /* check that the slave has not been initialized yet. */ 2029 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2030 2031 /* port initialization */ 2032 port = &(SLAVE_AD_INFO(slave)->port); 2033 2034 ad_initialize_port(port, bond->params.lacp_fast); 2035 2036 port->slave = slave; 2037 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2038 /* key is determined according to the link speed, duplex and 2039 * user key 2040 */ 2041 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2042 ad_update_actor_keys(port, false); 2043 /* actor system is the bond's system */ 2044 __ad_actor_update_port(port); 2045 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2046 * lacpdu's are sent in one second) 2047 */ 2048 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2049 2050 __disable_port(port); 2051 2052 /* aggregator initialization */ 2053 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2054 2055 ad_initialize_agg(aggregator); 2056 2057 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2058 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2059 aggregator->slave = slave; 2060 aggregator->is_active = 0; 2061 aggregator->num_of_ports = 0; 2062 } 2063 } 2064 2065 /** 2066 * bond_3ad_unbind_slave - deinitialize a slave's port 2067 * @slave: slave struct to work on 2068 * 2069 * Search for the aggregator that is related to this port, remove the 2070 * aggregator and assign another aggregator for other port related to it 2071 * (if any), and remove the port. 2072 */ 2073 void bond_3ad_unbind_slave(struct slave *slave) 2074 { 2075 struct port *port, *prev_port, *temp_port; 2076 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2077 int select_new_active_agg = 0; 2078 struct bonding *bond = slave->bond; 2079 struct slave *slave_iter; 2080 struct list_head *iter; 2081 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2082 2083 /* Sync against bond_3ad_state_machine_handler() */ 2084 spin_lock_bh(&bond->mode_lock); 2085 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2086 port = &(SLAVE_AD_INFO(slave)->port); 2087 2088 /* if slave is null, the whole port is not initialized */ 2089 if (!port->slave) { 2090 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n"); 2091 goto out; 2092 } 2093 2094 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n", 2095 aggregator->aggregator_identifier); 2096 2097 /* Tell the partner that this port is not suitable for aggregation */ 2098 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 2099 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 2100 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 2101 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION; 2102 __update_lacpdu_from_port(port); 2103 ad_lacpdu_send(port); 2104 2105 /* check if this aggregator is occupied */ 2106 if (aggregator->lag_ports) { 2107 /* check if there are other ports related to this aggregator 2108 * except the port related to this slave(thats ensure us that 2109 * there is a reason to search for new aggregator, and that we 2110 * will find one 2111 */ 2112 if ((aggregator->lag_ports != port) || 2113 (aggregator->lag_ports->next_port_in_aggregator)) { 2114 /* find new aggregator for the related port(s) */ 2115 bond_for_each_slave(bond, slave_iter, iter) { 2116 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2117 /* if the new aggregator is empty, or it is 2118 * connected to our port only 2119 */ 2120 if (!new_aggregator->lag_ports || 2121 ((new_aggregator->lag_ports == port) && 2122 !new_aggregator->lag_ports->next_port_in_aggregator)) 2123 break; 2124 } 2125 if (!slave_iter) 2126 new_aggregator = NULL; 2127 2128 /* if new aggregator found, copy the aggregator's 2129 * parameters and connect the related lag_ports to the 2130 * new aggregator 2131 */ 2132 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2133 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2134 aggregator->aggregator_identifier, 2135 new_aggregator->aggregator_identifier); 2136 2137 if ((new_aggregator->lag_ports == port) && 2138 new_aggregator->is_active) { 2139 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2140 select_new_active_agg = 1; 2141 } 2142 2143 new_aggregator->is_individual = aggregator->is_individual; 2144 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2145 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2146 new_aggregator->partner_system = aggregator->partner_system; 2147 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2148 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2149 new_aggregator->receive_state = aggregator->receive_state; 2150 new_aggregator->transmit_state = aggregator->transmit_state; 2151 new_aggregator->lag_ports = aggregator->lag_ports; 2152 new_aggregator->is_active = aggregator->is_active; 2153 new_aggregator->num_of_ports = aggregator->num_of_ports; 2154 2155 /* update the information that is written on 2156 * the ports about the aggregator 2157 */ 2158 for (temp_port = aggregator->lag_ports; temp_port; 2159 temp_port = temp_port->next_port_in_aggregator) { 2160 temp_port->aggregator = new_aggregator; 2161 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2162 } 2163 2164 ad_clear_agg(aggregator); 2165 2166 if (select_new_active_agg) 2167 ad_agg_selection_logic(__get_first_agg(port), 2168 &dummy_slave_update); 2169 } else { 2170 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2171 } 2172 } else { 2173 /* in case that the only port related to this 2174 * aggregator is the one we want to remove 2175 */ 2176 select_new_active_agg = aggregator->is_active; 2177 ad_clear_agg(aggregator); 2178 if (select_new_active_agg) { 2179 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2180 /* select new active aggregator */ 2181 temp_aggregator = __get_first_agg(port); 2182 if (temp_aggregator) 2183 ad_agg_selection_logic(temp_aggregator, 2184 &dummy_slave_update); 2185 } 2186 } 2187 } 2188 2189 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number); 2190 2191 /* find the aggregator that this port is connected to */ 2192 bond_for_each_slave(bond, slave_iter, iter) { 2193 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2194 prev_port = NULL; 2195 /* search the port in the aggregator's related ports */ 2196 for (temp_port = temp_aggregator->lag_ports; temp_port; 2197 prev_port = temp_port, 2198 temp_port = temp_port->next_port_in_aggregator) { 2199 if (temp_port == port) { 2200 /* the aggregator found - detach the port from 2201 * this aggregator 2202 */ 2203 if (prev_port) 2204 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2205 else 2206 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2207 temp_aggregator->num_of_ports--; 2208 if (__agg_active_ports(temp_aggregator) == 0) { 2209 select_new_active_agg = temp_aggregator->is_active; 2210 ad_clear_agg(temp_aggregator); 2211 if (select_new_active_agg) { 2212 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2213 /* select new active aggregator */ 2214 ad_agg_selection_logic(__get_first_agg(port), 2215 &dummy_slave_update); 2216 } 2217 } 2218 break; 2219 } 2220 } 2221 } 2222 port->slave = NULL; 2223 2224 out: 2225 spin_unlock_bh(&bond->mode_lock); 2226 } 2227 2228 /** 2229 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2230 * @bond: bonding struct to work on 2231 * 2232 * If an ad_actor setting gets changed we need to update the individual port 2233 * settings so the bond device will use the new values when it gets upped. 2234 */ 2235 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2236 { 2237 struct list_head *iter; 2238 struct slave *slave; 2239 2240 ASSERT_RTNL(); 2241 2242 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2243 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2244 BOND_AD_INFO(bond).system.sys_mac_addr = 2245 *((struct mac_addr *)bond->dev->dev_addr); 2246 else 2247 BOND_AD_INFO(bond).system.sys_mac_addr = 2248 *((struct mac_addr *)bond->params.ad_actor_system); 2249 2250 spin_lock_bh(&bond->mode_lock); 2251 bond_for_each_slave(bond, slave, iter) { 2252 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2253 2254 __ad_actor_update_port(port); 2255 port->ntt = true; 2256 } 2257 spin_unlock_bh(&bond->mode_lock); 2258 } 2259 2260 /** 2261 * bond_3ad_state_machine_handler - handle state machines timeout 2262 * @bond: bonding struct to work on 2263 * 2264 * The state machine handling concept in this module is to check every tick 2265 * which state machine should operate any function. The execution order is 2266 * round robin, so when we have an interaction between state machines, the 2267 * reply of one to each other might be delayed until next tick. 2268 * 2269 * This function also complete the initialization when the agg_select_timer 2270 * times out, and it selects an aggregator for the ports that are yet not 2271 * related to any aggregator, and selects the active aggregator for a bond. 2272 */ 2273 void bond_3ad_state_machine_handler(struct work_struct *work) 2274 { 2275 struct bonding *bond = container_of(work, struct bonding, 2276 ad_work.work); 2277 struct aggregator *aggregator; 2278 struct list_head *iter; 2279 struct slave *slave; 2280 struct port *port; 2281 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2282 bool update_slave_arr = false; 2283 2284 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2285 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2286 * concurrently due to incoming LACPDU as well. 2287 */ 2288 spin_lock_bh(&bond->mode_lock); 2289 rcu_read_lock(); 2290 2291 /* check if there are any slaves */ 2292 if (!bond_has_slaves(bond)) 2293 goto re_arm; 2294 2295 /* check if agg_select_timer timer after initialize is timed out */ 2296 if (BOND_AD_INFO(bond).agg_select_timer && 2297 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2298 slave = bond_first_slave_rcu(bond); 2299 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2300 2301 /* select the active aggregator for the bond */ 2302 if (port) { 2303 if (!port->slave) { 2304 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2305 bond->dev->name); 2306 goto re_arm; 2307 } 2308 2309 aggregator = __get_first_agg(port); 2310 ad_agg_selection_logic(aggregator, &update_slave_arr); 2311 } 2312 bond_3ad_set_carrier(bond); 2313 } 2314 2315 /* for each port run the state machines */ 2316 bond_for_each_slave_rcu(bond, slave, iter) { 2317 port = &(SLAVE_AD_INFO(slave)->port); 2318 if (!port->slave) { 2319 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2320 bond->dev->name); 2321 goto re_arm; 2322 } 2323 2324 ad_rx_machine(NULL, port); 2325 ad_periodic_machine(port); 2326 ad_port_selection_logic(port, &update_slave_arr); 2327 ad_mux_machine(port, &update_slave_arr); 2328 ad_tx_machine(port); 2329 ad_churn_machine(port); 2330 2331 /* turn off the BEGIN bit, since we already handled it */ 2332 if (port->sm_vars & AD_PORT_BEGIN) 2333 port->sm_vars &= ~AD_PORT_BEGIN; 2334 } 2335 2336 re_arm: 2337 bond_for_each_slave_rcu(bond, slave, iter) { 2338 if (slave->should_notify) { 2339 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2340 break; 2341 } 2342 } 2343 rcu_read_unlock(); 2344 spin_unlock_bh(&bond->mode_lock); 2345 2346 if (update_slave_arr) 2347 bond_slave_arr_work_rearm(bond, 0); 2348 2349 if (should_notify_rtnl && rtnl_trylock()) { 2350 bond_slave_state_notify(bond); 2351 rtnl_unlock(); 2352 } 2353 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2354 } 2355 2356 /** 2357 * bond_3ad_rx_indication - handle a received frame 2358 * @lacpdu: received lacpdu 2359 * @slave: slave struct to work on 2360 * 2361 * It is assumed that frames that were sent on this NIC don't returned as new 2362 * received frames (loopback). Since only the payload is given to this 2363 * function, it check for loopback. 2364 */ 2365 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave) 2366 { 2367 struct bonding *bond = slave->bond; 2368 int ret = RX_HANDLER_ANOTHER; 2369 struct bond_marker *marker; 2370 struct port *port; 2371 atomic64_t *stat; 2372 2373 port = &(SLAVE_AD_INFO(slave)->port); 2374 if (!port->slave) { 2375 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2376 slave->dev->name, slave->bond->dev->name); 2377 return ret; 2378 } 2379 2380 switch (lacpdu->subtype) { 2381 case AD_TYPE_LACPDU: 2382 ret = RX_HANDLER_CONSUMED; 2383 slave_dbg(slave->bond->dev, slave->dev, 2384 "Received LACPDU on port %d\n", 2385 port->actor_port_number); 2386 /* Protect against concurrent state machines */ 2387 spin_lock(&slave->bond->mode_lock); 2388 ad_rx_machine(lacpdu, port); 2389 spin_unlock(&slave->bond->mode_lock); 2390 break; 2391 case AD_TYPE_MARKER: 2392 ret = RX_HANDLER_CONSUMED; 2393 /* No need to convert fields to Little Endian since we 2394 * don't use the marker's fields. 2395 */ 2396 marker = (struct bond_marker *)lacpdu; 2397 switch (marker->tlv_type) { 2398 case AD_MARKER_INFORMATION_SUBTYPE: 2399 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n", 2400 port->actor_port_number); 2401 ad_marker_info_received(marker, port); 2402 break; 2403 case AD_MARKER_RESPONSE_SUBTYPE: 2404 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n", 2405 port->actor_port_number); 2406 ad_marker_response_received(marker, port); 2407 break; 2408 default: 2409 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n", 2410 port->actor_port_number); 2411 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx; 2412 atomic64_inc(stat); 2413 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx; 2414 atomic64_inc(stat); 2415 } 2416 break; 2417 default: 2418 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx); 2419 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx); 2420 } 2421 2422 return ret; 2423 } 2424 2425 /** 2426 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2427 * its current speed and duplex settings. 2428 * 2429 * @port: the port we'are looking at 2430 * @reset: Boolean to just reset the speed and the duplex part of the key 2431 * 2432 * The logic to change the oper / admin keys is: 2433 * (a) A full duplex port can participate in LACP with partner. 2434 * (b) When the speed is changed, LACP need to be reinitiated. 2435 */ 2436 static void ad_update_actor_keys(struct port *port, bool reset) 2437 { 2438 u8 duplex = 0; 2439 u16 ospeed = 0, speed = 0; 2440 u16 old_oper_key = port->actor_oper_port_key; 2441 2442 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2443 if (!reset) { 2444 speed = __get_link_speed(port); 2445 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2446 duplex = __get_duplex(port); 2447 port->actor_admin_port_key |= (speed << 1) | duplex; 2448 } 2449 port->actor_oper_port_key = port->actor_admin_port_key; 2450 2451 if (old_oper_key != port->actor_oper_port_key) { 2452 /* Only 'duplex' port participates in LACP */ 2453 if (duplex) 2454 port->sm_vars |= AD_PORT_LACP_ENABLED; 2455 else 2456 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2457 2458 if (!reset) { 2459 if (!speed) { 2460 slave_err(port->slave->bond->dev, 2461 port->slave->dev, 2462 "speed changed to 0 on port %d\n", 2463 port->actor_port_number); 2464 } else if (duplex && ospeed != speed) { 2465 /* Speed change restarts LACP state-machine */ 2466 port->sm_vars |= AD_PORT_BEGIN; 2467 } 2468 } 2469 } 2470 } 2471 2472 /** 2473 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2474 * change indication 2475 * 2476 * @slave: slave struct to work on 2477 * 2478 * Handle reselection of aggregator (if needed) for this port. 2479 */ 2480 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2481 { 2482 struct port *port; 2483 2484 port = &(SLAVE_AD_INFO(slave)->port); 2485 2486 /* if slave is null, the whole port is not initialized */ 2487 if (!port->slave) { 2488 slave_warn(slave->bond->dev, slave->dev, 2489 "speed/duplex changed for uninitialized port\n"); 2490 return; 2491 } 2492 2493 spin_lock_bh(&slave->bond->mode_lock); 2494 ad_update_actor_keys(port, false); 2495 spin_unlock_bh(&slave->bond->mode_lock); 2496 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n", 2497 port->actor_port_number); 2498 } 2499 2500 /** 2501 * bond_3ad_handle_link_change - handle a slave's link status change indication 2502 * @slave: slave struct to work on 2503 * @status: whether the link is now up or down 2504 * 2505 * Handle reselection of aggregator (if needed) for this port. 2506 */ 2507 void bond_3ad_handle_link_change(struct slave *slave, char link) 2508 { 2509 struct aggregator *agg; 2510 struct port *port; 2511 bool dummy; 2512 2513 port = &(SLAVE_AD_INFO(slave)->port); 2514 2515 /* if slave is null, the whole port is not initialized */ 2516 if (!port->slave) { 2517 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n"); 2518 return; 2519 } 2520 2521 spin_lock_bh(&slave->bond->mode_lock); 2522 /* on link down we are zeroing duplex and speed since 2523 * some of the adaptors(ce1000.lan) report full duplex/speed 2524 * instead of N/A(duplex) / 0(speed). 2525 * 2526 * on link up we are forcing recheck on the duplex and speed since 2527 * some of he adaptors(ce1000.lan) report. 2528 */ 2529 if (link == BOND_LINK_UP) { 2530 port->is_enabled = true; 2531 ad_update_actor_keys(port, false); 2532 } else { 2533 /* link has failed */ 2534 port->is_enabled = false; 2535 ad_update_actor_keys(port, true); 2536 } 2537 agg = __get_first_agg(port); 2538 ad_agg_selection_logic(agg, &dummy); 2539 2540 spin_unlock_bh(&slave->bond->mode_lock); 2541 2542 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n", 2543 port->actor_port_number, 2544 link == BOND_LINK_UP ? "UP" : "DOWN"); 2545 2546 /* RTNL is held and mode_lock is released so it's safe 2547 * to update slave_array here. 2548 */ 2549 bond_update_slave_arr(slave->bond, NULL); 2550 } 2551 2552 /** 2553 * bond_3ad_set_carrier - set link state for bonding master 2554 * @bond - bonding structure 2555 * 2556 * if we have an active aggregator, we're up, if not, we're down. 2557 * Presumes that we cannot have an active aggregator if there are 2558 * no slaves with link up. 2559 * 2560 * This behavior complies with IEEE 802.3 section 43.3.9. 2561 * 2562 * Called by bond_set_carrier(). Return zero if carrier state does not 2563 * change, nonzero if it does. 2564 */ 2565 int bond_3ad_set_carrier(struct bonding *bond) 2566 { 2567 struct aggregator *active; 2568 struct slave *first_slave; 2569 int ret = 1; 2570 2571 rcu_read_lock(); 2572 first_slave = bond_first_slave_rcu(bond); 2573 if (!first_slave) { 2574 ret = 0; 2575 goto out; 2576 } 2577 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2578 if (active) { 2579 /* are enough slaves available to consider link up? */ 2580 if (__agg_active_ports(active) < bond->params.min_links) { 2581 if (netif_carrier_ok(bond->dev)) { 2582 netif_carrier_off(bond->dev); 2583 goto out; 2584 } 2585 } else if (!netif_carrier_ok(bond->dev)) { 2586 netif_carrier_on(bond->dev); 2587 goto out; 2588 } 2589 } else if (netif_carrier_ok(bond->dev)) { 2590 netif_carrier_off(bond->dev); 2591 } 2592 out: 2593 rcu_read_unlock(); 2594 return ret; 2595 } 2596 2597 /** 2598 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2599 * @bond: bonding struct to work on 2600 * @ad_info: ad_info struct to fill with the bond's info 2601 * 2602 * Returns: 0 on success 2603 * < 0 on error 2604 */ 2605 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2606 struct ad_info *ad_info) 2607 { 2608 struct aggregator *aggregator = NULL; 2609 struct list_head *iter; 2610 struct slave *slave; 2611 struct port *port; 2612 2613 bond_for_each_slave_rcu(bond, slave, iter) { 2614 port = &(SLAVE_AD_INFO(slave)->port); 2615 if (port->aggregator && port->aggregator->is_active) { 2616 aggregator = port->aggregator; 2617 break; 2618 } 2619 } 2620 2621 if (!aggregator) 2622 return -1; 2623 2624 ad_info->aggregator_id = aggregator->aggregator_identifier; 2625 ad_info->ports = __agg_active_ports(aggregator); 2626 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2627 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2628 ether_addr_copy(ad_info->partner_system, 2629 aggregator->partner_system.mac_addr_value); 2630 return 0; 2631 } 2632 2633 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2634 { 2635 int ret; 2636 2637 rcu_read_lock(); 2638 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2639 rcu_read_unlock(); 2640 2641 return ret; 2642 } 2643 2644 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2645 struct slave *slave) 2646 { 2647 struct lacpdu *lacpdu, _lacpdu; 2648 2649 if (skb->protocol != PKT_TYPE_LACPDU) 2650 return RX_HANDLER_ANOTHER; 2651 2652 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2653 return RX_HANDLER_ANOTHER; 2654 2655 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2656 if (!lacpdu) { 2657 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx); 2658 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx); 2659 return RX_HANDLER_ANOTHER; 2660 } 2661 2662 return bond_3ad_rx_indication(lacpdu, slave); 2663 } 2664 2665 /** 2666 * bond_3ad_update_lacp_rate - change the lacp rate 2667 * @bond - bonding struct 2668 * 2669 * When modify lacp_rate parameter via sysfs, 2670 * update actor_oper_port_state of each port. 2671 * 2672 * Hold bond->mode_lock, 2673 * so we can modify port->actor_oper_port_state, 2674 * no matter bond is up or down. 2675 */ 2676 void bond_3ad_update_lacp_rate(struct bonding *bond) 2677 { 2678 struct port *port = NULL; 2679 struct list_head *iter; 2680 struct slave *slave; 2681 int lacp_fast; 2682 2683 lacp_fast = bond->params.lacp_fast; 2684 spin_lock_bh(&bond->mode_lock); 2685 bond_for_each_slave(bond, slave, iter) { 2686 port = &(SLAVE_AD_INFO(slave)->port); 2687 if (lacp_fast) 2688 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 2689 else 2690 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT; 2691 } 2692 spin_unlock_bh(&bond->mode_lock); 2693 } 2694 2695 size_t bond_3ad_stats_size(void) 2696 { 2697 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */ 2698 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */ 2699 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */ 2700 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */ 2701 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */ 2702 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */ 2703 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */ 2704 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */ 2705 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */ 2706 } 2707 2708 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats) 2709 { 2710 u64 val; 2711 2712 val = atomic64_read(&stats->lacpdu_rx); 2713 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val, 2714 BOND_3AD_STAT_PAD)) 2715 return -EMSGSIZE; 2716 val = atomic64_read(&stats->lacpdu_tx); 2717 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val, 2718 BOND_3AD_STAT_PAD)) 2719 return -EMSGSIZE; 2720 val = atomic64_read(&stats->lacpdu_unknown_rx); 2721 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val, 2722 BOND_3AD_STAT_PAD)) 2723 return -EMSGSIZE; 2724 val = atomic64_read(&stats->lacpdu_illegal_rx); 2725 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val, 2726 BOND_3AD_STAT_PAD)) 2727 return -EMSGSIZE; 2728 2729 val = atomic64_read(&stats->marker_rx); 2730 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val, 2731 BOND_3AD_STAT_PAD)) 2732 return -EMSGSIZE; 2733 val = atomic64_read(&stats->marker_tx); 2734 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val, 2735 BOND_3AD_STAT_PAD)) 2736 return -EMSGSIZE; 2737 val = atomic64_read(&stats->marker_resp_rx); 2738 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val, 2739 BOND_3AD_STAT_PAD)) 2740 return -EMSGSIZE; 2741 val = atomic64_read(&stats->marker_resp_tx); 2742 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val, 2743 BOND_3AD_STAT_PAD)) 2744 return -EMSGSIZE; 2745 val = atomic64_read(&stats->marker_unknown_rx); 2746 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val, 2747 BOND_3AD_STAT_PAD)) 2748 return -EMSGSIZE; 2749 2750 return 0; 2751 } 2752