1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. 4 */ 5 6 #include <linux/skbuff.h> 7 #include <linux/if_ether.h> 8 #include <linux/netdevice.h> 9 #include <linux/spinlock.h> 10 #include <linux/ethtool.h> 11 #include <linux/etherdevice.h> 12 #include <linux/if_bonding.h> 13 #include <linux/pkt_sched.h> 14 #include <net/net_namespace.h> 15 #include <net/bonding.h> 16 #include <net/bond_3ad.h> 17 #include <net/netlink.h> 18 19 /* General definitions */ 20 #define AD_SHORT_TIMEOUT 1 21 #define AD_LONG_TIMEOUT 0 22 #define AD_STANDBY 0x2 23 #define AD_MAX_TX_IN_SECOND 3 24 #define AD_COLLECTOR_MAX_DELAY 0 25 26 /* Timer definitions (43.4.4 in the 802.3ad standard) */ 27 #define AD_FAST_PERIODIC_TIME 1 28 #define AD_SLOW_PERIODIC_TIME 30 29 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) 30 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) 31 #define AD_CHURN_DETECTION_TIME 60 32 #define AD_AGGREGATE_WAIT_TIME 2 33 34 /* Port Variables definitions used by the State Machines (43.4.7 in the 35 * 802.3ad standard) 36 */ 37 #define AD_PORT_BEGIN 0x1 38 #define AD_PORT_LACP_ENABLED 0x2 39 #define AD_PORT_ACTOR_CHURN 0x4 40 #define AD_PORT_PARTNER_CHURN 0x8 41 #define AD_PORT_READY 0x10 42 #define AD_PORT_READY_N 0x20 43 #define AD_PORT_MATCHED 0x40 44 #define AD_PORT_STANDBY 0x80 45 #define AD_PORT_SELECTED 0x100 46 #define AD_PORT_MOVED 0x200 47 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) 48 49 /* Port Key definitions 50 * key is determined according to the link speed, duplex and 51 * user key (which is yet not supported) 52 * -------------------------------------------------------------- 53 * Port key | User key (10 bits) | Speed (5 bits) | Duplex| 54 * -------------------------------------------------------------- 55 * |15 6|5 1|0 56 */ 57 #define AD_DUPLEX_KEY_MASKS 0x1 58 #define AD_SPEED_KEY_MASKS 0x3E 59 #define AD_USER_KEY_MASKS 0xFFC0 60 61 enum ad_link_speed_type { 62 AD_LINK_SPEED_1MBPS = 1, 63 AD_LINK_SPEED_10MBPS, 64 AD_LINK_SPEED_100MBPS, 65 AD_LINK_SPEED_1000MBPS, 66 AD_LINK_SPEED_2500MBPS, 67 AD_LINK_SPEED_5000MBPS, 68 AD_LINK_SPEED_10000MBPS, 69 AD_LINK_SPEED_14000MBPS, 70 AD_LINK_SPEED_20000MBPS, 71 AD_LINK_SPEED_25000MBPS, 72 AD_LINK_SPEED_40000MBPS, 73 AD_LINK_SPEED_50000MBPS, 74 AD_LINK_SPEED_56000MBPS, 75 AD_LINK_SPEED_100000MBPS, 76 AD_LINK_SPEED_200000MBPS, 77 AD_LINK_SPEED_400000MBPS, 78 }; 79 80 /* compare MAC addresses */ 81 #define MAC_ADDRESS_EQUAL(A, B) \ 82 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 83 84 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 85 0, 0, 0, 0, 0, 0 86 }; 87 static u16 ad_ticks_per_sec; 88 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 89 90 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = 91 MULTICAST_LACPDU_ADDR; 92 93 /* ================= main 802.3ad protocol functions ================== */ 94 static int ad_lacpdu_send(struct port *port); 95 static int ad_marker_send(struct port *port, struct bond_marker *marker); 96 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 97 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 98 static void ad_tx_machine(struct port *port); 99 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params); 100 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 101 static void ad_agg_selection_logic(struct aggregator *aggregator, 102 bool *update_slave_arr); 103 static void ad_clear_agg(struct aggregator *aggregator); 104 static void ad_initialize_agg(struct aggregator *aggregator); 105 static void ad_initialize_port(struct port *port, int lacp_fast); 106 static void ad_enable_collecting_distributing(struct port *port, 107 bool *update_slave_arr); 108 static void ad_disable_collecting_distributing(struct port *port, 109 bool *update_slave_arr); 110 static void ad_marker_info_received(struct bond_marker *marker_info, 111 struct port *port); 112 static void ad_marker_response_received(struct bond_marker *marker, 113 struct port *port); 114 static void ad_update_actor_keys(struct port *port, bool reset); 115 116 117 /* ================= api to bonding and kernel code ================== */ 118 119 /** 120 * __get_bond_by_port - get the port's bonding struct 121 * @port: the port we're looking at 122 * 123 * Return @port's bonding struct, or %NULL if it can't be found. 124 */ 125 static inline struct bonding *__get_bond_by_port(struct port *port) 126 { 127 if (port->slave == NULL) 128 return NULL; 129 130 return bond_get_bond_by_slave(port->slave); 131 } 132 133 /** 134 * __get_first_agg - get the first aggregator in the bond 135 * @port: the port we're looking at 136 * 137 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 138 * found. 139 * The caller must hold RCU or RTNL lock. 140 */ 141 static inline struct aggregator *__get_first_agg(struct port *port) 142 { 143 struct bonding *bond = __get_bond_by_port(port); 144 struct slave *first_slave; 145 struct aggregator *agg; 146 147 /* If there's no bond for this port, or bond has no slaves */ 148 if (bond == NULL) 149 return NULL; 150 151 rcu_read_lock(); 152 first_slave = bond_first_slave_rcu(bond); 153 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 154 rcu_read_unlock(); 155 156 return agg; 157 } 158 159 /** 160 * __agg_has_partner - see if we have a partner 161 * @agg: the agregator we're looking at 162 * 163 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 164 * address for the partner). Return 0 if not. 165 */ 166 static inline int __agg_has_partner(struct aggregator *agg) 167 { 168 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 169 } 170 171 /** 172 * __disable_port - disable the port's slave 173 * @port: the port we're looking at 174 */ 175 static inline void __disable_port(struct port *port) 176 { 177 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 178 } 179 180 /** 181 * __enable_port - enable the port's slave, if it's up 182 * @port: the port we're looking at 183 */ 184 static inline void __enable_port(struct port *port) 185 { 186 struct slave *slave = port->slave; 187 188 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 189 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 190 } 191 192 /** 193 * __port_is_enabled - check if the port's slave is in active state 194 * @port: the port we're looking at 195 */ 196 static inline int __port_is_enabled(struct port *port) 197 { 198 return bond_is_active_slave(port->slave); 199 } 200 201 /** 202 * __get_agg_selection_mode - get the aggregator selection mode 203 * @port: the port we're looking at 204 * 205 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 206 */ 207 static inline u32 __get_agg_selection_mode(struct port *port) 208 { 209 struct bonding *bond = __get_bond_by_port(port); 210 211 if (bond == NULL) 212 return BOND_AD_STABLE; 213 214 return bond->params.ad_select; 215 } 216 217 /** 218 * __check_agg_selection_timer - check if the selection timer has expired 219 * @port: the port we're looking at 220 */ 221 static inline int __check_agg_selection_timer(struct port *port) 222 { 223 struct bonding *bond = __get_bond_by_port(port); 224 225 if (bond == NULL) 226 return 0; 227 228 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 229 } 230 231 /** 232 * __get_link_speed - get a port's speed 233 * @port: the port we're looking at 234 * 235 * Return @port's speed in 802.3ad enum format. i.e. one of: 236 * 0, 237 * %AD_LINK_SPEED_10MBPS, 238 * %AD_LINK_SPEED_100MBPS, 239 * %AD_LINK_SPEED_1000MBPS, 240 * %AD_LINK_SPEED_2500MBPS, 241 * %AD_LINK_SPEED_5000MBPS, 242 * %AD_LINK_SPEED_10000MBPS 243 * %AD_LINK_SPEED_14000MBPS, 244 * %AD_LINK_SPEED_20000MBPS 245 * %AD_LINK_SPEED_25000MBPS 246 * %AD_LINK_SPEED_40000MBPS 247 * %AD_LINK_SPEED_50000MBPS 248 * %AD_LINK_SPEED_56000MBPS 249 * %AD_LINK_SPEED_100000MBPS 250 * %AD_LINK_SPEED_200000MBPS 251 * %AD_LINK_SPEED_400000MBPS 252 */ 253 static u16 __get_link_speed(struct port *port) 254 { 255 struct slave *slave = port->slave; 256 u16 speed; 257 258 /* this if covers only a special case: when the configuration starts 259 * with link down, it sets the speed to 0. 260 * This is done in spite of the fact that the e100 driver reports 0 261 * to be compatible with MVT in the future. 262 */ 263 if (slave->link != BOND_LINK_UP) 264 speed = 0; 265 else { 266 switch (slave->speed) { 267 case SPEED_10: 268 speed = AD_LINK_SPEED_10MBPS; 269 break; 270 271 case SPEED_100: 272 speed = AD_LINK_SPEED_100MBPS; 273 break; 274 275 case SPEED_1000: 276 speed = AD_LINK_SPEED_1000MBPS; 277 break; 278 279 case SPEED_2500: 280 speed = AD_LINK_SPEED_2500MBPS; 281 break; 282 283 case SPEED_5000: 284 speed = AD_LINK_SPEED_5000MBPS; 285 break; 286 287 case SPEED_10000: 288 speed = AD_LINK_SPEED_10000MBPS; 289 break; 290 291 case SPEED_14000: 292 speed = AD_LINK_SPEED_14000MBPS; 293 break; 294 295 case SPEED_20000: 296 speed = AD_LINK_SPEED_20000MBPS; 297 break; 298 299 case SPEED_25000: 300 speed = AD_LINK_SPEED_25000MBPS; 301 break; 302 303 case SPEED_40000: 304 speed = AD_LINK_SPEED_40000MBPS; 305 break; 306 307 case SPEED_50000: 308 speed = AD_LINK_SPEED_50000MBPS; 309 break; 310 311 case SPEED_56000: 312 speed = AD_LINK_SPEED_56000MBPS; 313 break; 314 315 case SPEED_100000: 316 speed = AD_LINK_SPEED_100000MBPS; 317 break; 318 319 case SPEED_200000: 320 speed = AD_LINK_SPEED_200000MBPS; 321 break; 322 323 case SPEED_400000: 324 speed = AD_LINK_SPEED_400000MBPS; 325 break; 326 327 default: 328 /* unknown speed value from ethtool. shouldn't happen */ 329 if (slave->speed != SPEED_UNKNOWN) 330 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n", 331 slave->bond->dev->name, 332 slave->dev->name, slave->speed, 333 port->actor_port_number); 334 speed = 0; 335 break; 336 } 337 } 338 339 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n", 340 port->actor_port_number, speed); 341 return speed; 342 } 343 344 /** 345 * __get_duplex - get a port's duplex 346 * @port: the port we're looking at 347 * 348 * Return @port's duplex in 802.3ad bitmask format. i.e.: 349 * 0x01 if in full duplex 350 * 0x00 otherwise 351 */ 352 static u8 __get_duplex(struct port *port) 353 { 354 struct slave *slave = port->slave; 355 u8 retval = 0x0; 356 357 /* handling a special case: when the configuration starts with 358 * link down, it sets the duplex to 0. 359 */ 360 if (slave->link == BOND_LINK_UP) { 361 switch (slave->duplex) { 362 case DUPLEX_FULL: 363 retval = 0x1; 364 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n", 365 port->actor_port_number); 366 break; 367 case DUPLEX_HALF: 368 default: 369 retval = 0x0; 370 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n", 371 port->actor_port_number); 372 break; 373 } 374 } 375 return retval; 376 } 377 378 static void __ad_actor_update_port(struct port *port) 379 { 380 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 381 382 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 383 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 384 } 385 386 /* Conversions */ 387 388 /** 389 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 390 * @timer_type: which timer to operate 391 * @par: timer parameter. see below 392 * 393 * If @timer_type is %current_while_timer, @par indicates long/short timer. 394 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 395 * %SLOW_PERIODIC_TIME. 396 */ 397 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 398 { 399 u16 retval = 0; /* to silence the compiler */ 400 401 switch (timer_type) { 402 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 403 if (par) 404 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 405 else 406 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 407 break; 408 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 409 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 410 break; 411 case AD_PERIODIC_TIMER: /* for periodic machine */ 412 retval = (par*ad_ticks_per_sec); /* long timeout */ 413 break; 414 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 415 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 416 break; 417 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 418 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 419 break; 420 } 421 422 return retval; 423 } 424 425 426 /* ================= ad_rx_machine helper functions ================== */ 427 428 /** 429 * __choose_matched - update a port's matched variable from a received lacpdu 430 * @lacpdu: the lacpdu we've received 431 * @port: the port we're looking at 432 * 433 * Update the value of the matched variable, using parameter values from a 434 * newly received lacpdu. Parameter values for the partner carried in the 435 * received PDU are compared with the corresponding operational parameter 436 * values for the actor. Matched is set to TRUE if all of these parameters 437 * match and the PDU parameter partner_state.aggregation has the same value as 438 * actor_oper_port_state.aggregation and lacp will actively maintain the link 439 * in the aggregation. Matched is also set to TRUE if the value of 440 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 441 * an individual link and lacp will actively maintain the link. Otherwise, 442 * matched is set to FALSE. LACP is considered to be actively maintaining the 443 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 444 * the actor's actor_oper_port_state.lacp_activity and the PDU's 445 * partner_state.lacp_activity variables are TRUE. 446 * 447 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 448 * used here to implement the language from 802.3ad 43.4.9 that requires 449 * recordPDU to "match" the LACPDU parameters to the stored values. 450 */ 451 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 452 { 453 /* check if all parameters are alike 454 * or this is individual link(aggregation == FALSE) 455 * then update the state machine Matched variable. 456 */ 457 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 458 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 459 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 460 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 461 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 462 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) || 463 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0) 464 ) { 465 port->sm_vars |= AD_PORT_MATCHED; 466 } else { 467 port->sm_vars &= ~AD_PORT_MATCHED; 468 } 469 } 470 471 /** 472 * __record_pdu - record parameters from a received lacpdu 473 * @lacpdu: the lacpdu we've received 474 * @port: the port we're looking at 475 * 476 * Record the parameter values for the Actor carried in a received lacpdu as 477 * the current partner operational parameter values and sets 478 * actor_oper_port_state.defaulted to FALSE. 479 */ 480 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 481 { 482 if (lacpdu && port) { 483 struct port_params *partner = &port->partner_oper; 484 485 __choose_matched(lacpdu, port); 486 /* record the new parameter values for the partner 487 * operational 488 */ 489 partner->port_number = ntohs(lacpdu->actor_port); 490 partner->port_priority = ntohs(lacpdu->actor_port_priority); 491 partner->system = lacpdu->actor_system; 492 partner->system_priority = ntohs(lacpdu->actor_system_priority); 493 partner->key = ntohs(lacpdu->actor_key); 494 partner->port_state = lacpdu->actor_state; 495 496 /* set actor_oper_port_state.defaulted to FALSE */ 497 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED; 498 499 /* set the partner sync. to on if the partner is sync, 500 * and the port is matched 501 */ 502 if ((port->sm_vars & AD_PORT_MATCHED) && 503 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) { 504 partner->port_state |= LACP_STATE_SYNCHRONIZATION; 505 slave_dbg(port->slave->bond->dev, port->slave->dev, 506 "partner sync=1\n"); 507 } else { 508 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION; 509 slave_dbg(port->slave->bond->dev, port->slave->dev, 510 "partner sync=0\n"); 511 } 512 } 513 } 514 515 /** 516 * __record_default - record default parameters 517 * @port: the port we're looking at 518 * 519 * This function records the default parameter values for the partner carried 520 * in the Partner Admin parameters as the current partner operational parameter 521 * values and sets actor_oper_port_state.defaulted to TRUE. 522 */ 523 static void __record_default(struct port *port) 524 { 525 if (port) { 526 /* record the partner admin parameters */ 527 memcpy(&port->partner_oper, &port->partner_admin, 528 sizeof(struct port_params)); 529 530 /* set actor_oper_port_state.defaulted to true */ 531 port->actor_oper_port_state |= LACP_STATE_DEFAULTED; 532 } 533 } 534 535 /** 536 * __update_selected - update a port's Selected variable from a received lacpdu 537 * @lacpdu: the lacpdu we've received 538 * @port: the port we're looking at 539 * 540 * Update the value of the selected variable, using parameter values from a 541 * newly received lacpdu. The parameter values for the Actor carried in the 542 * received PDU are compared with the corresponding operational parameter 543 * values for the ports partner. If one or more of the comparisons shows that 544 * the value(s) received in the PDU differ from the current operational values, 545 * then selected is set to FALSE and actor_oper_port_state.synchronization is 546 * set to out_of_sync. Otherwise, selected remains unchanged. 547 */ 548 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 549 { 550 if (lacpdu && port) { 551 const struct port_params *partner = &port->partner_oper; 552 553 /* check if any parameter is different then 554 * update the state machine selected variable. 555 */ 556 if (ntohs(lacpdu->actor_port) != partner->port_number || 557 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 558 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 559 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 560 ntohs(lacpdu->actor_key) != partner->key || 561 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) { 562 port->sm_vars &= ~AD_PORT_SELECTED; 563 } 564 } 565 } 566 567 /** 568 * __update_default_selected - update a port's Selected variable from Partner 569 * @port: the port we're looking at 570 * 571 * This function updates the value of the selected variable, using the partner 572 * administrative parameter values. The administrative values are compared with 573 * the corresponding operational parameter values for the partner. If one or 574 * more of the comparisons shows that the administrative value(s) differ from 575 * the current operational values, then Selected is set to FALSE and 576 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 577 * Selected remains unchanged. 578 */ 579 static void __update_default_selected(struct port *port) 580 { 581 if (port) { 582 const struct port_params *admin = &port->partner_admin; 583 const struct port_params *oper = &port->partner_oper; 584 585 /* check if any parameter is different then 586 * update the state machine selected variable. 587 */ 588 if (admin->port_number != oper->port_number || 589 admin->port_priority != oper->port_priority || 590 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 591 admin->system_priority != oper->system_priority || 592 admin->key != oper->key || 593 (admin->port_state & LACP_STATE_AGGREGATION) 594 != (oper->port_state & LACP_STATE_AGGREGATION)) { 595 port->sm_vars &= ~AD_PORT_SELECTED; 596 } 597 } 598 } 599 600 /** 601 * __update_ntt - update a port's ntt variable from a received lacpdu 602 * @lacpdu: the lacpdu we've received 603 * @port: the port we're looking at 604 * 605 * Updates the value of the ntt variable, using parameter values from a newly 606 * received lacpdu. The parameter values for the partner carried in the 607 * received PDU are compared with the corresponding operational parameter 608 * values for the Actor. If one or more of the comparisons shows that the 609 * value(s) received in the PDU differ from the current operational values, 610 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 611 */ 612 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 613 { 614 /* validate lacpdu and port */ 615 if (lacpdu && port) { 616 /* check if any parameter is different then 617 * update the port->ntt. 618 */ 619 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 620 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 621 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 622 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 623 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 624 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) || 625 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) || 626 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) || 627 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION)) 628 ) { 629 port->ntt = true; 630 } 631 } 632 } 633 634 /** 635 * __agg_ports_are_ready - check if all ports in an aggregator are ready 636 * @aggregator: the aggregator we're looking at 637 * 638 */ 639 static int __agg_ports_are_ready(struct aggregator *aggregator) 640 { 641 struct port *port; 642 int retval = 1; 643 644 if (aggregator) { 645 /* scan all ports in this aggregator to verfy if they are 646 * all ready. 647 */ 648 for (port = aggregator->lag_ports; 649 port; 650 port = port->next_port_in_aggregator) { 651 if (!(port->sm_vars & AD_PORT_READY_N)) { 652 retval = 0; 653 break; 654 } 655 } 656 } 657 658 return retval; 659 } 660 661 /** 662 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 663 * @aggregator: the aggregator we're looking at 664 * @val: Should the ports' ready bit be set on or off 665 * 666 */ 667 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 668 { 669 struct port *port; 670 671 for (port = aggregator->lag_ports; port; 672 port = port->next_port_in_aggregator) { 673 if (val) 674 port->sm_vars |= AD_PORT_READY; 675 else 676 port->sm_vars &= ~AD_PORT_READY; 677 } 678 } 679 680 static int __agg_active_ports(struct aggregator *agg) 681 { 682 struct port *port; 683 int active = 0; 684 685 for (port = agg->lag_ports; port; 686 port = port->next_port_in_aggregator) { 687 if (port->is_enabled) 688 active++; 689 } 690 691 return active; 692 } 693 694 /** 695 * __get_agg_bandwidth - get the total bandwidth of an aggregator 696 * @aggregator: the aggregator we're looking at 697 * 698 */ 699 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 700 { 701 int nports = __agg_active_ports(aggregator); 702 u32 bandwidth = 0; 703 704 if (nports) { 705 switch (__get_link_speed(aggregator->lag_ports)) { 706 case AD_LINK_SPEED_1MBPS: 707 bandwidth = nports; 708 break; 709 case AD_LINK_SPEED_10MBPS: 710 bandwidth = nports * 10; 711 break; 712 case AD_LINK_SPEED_100MBPS: 713 bandwidth = nports * 100; 714 break; 715 case AD_LINK_SPEED_1000MBPS: 716 bandwidth = nports * 1000; 717 break; 718 case AD_LINK_SPEED_2500MBPS: 719 bandwidth = nports * 2500; 720 break; 721 case AD_LINK_SPEED_5000MBPS: 722 bandwidth = nports * 5000; 723 break; 724 case AD_LINK_SPEED_10000MBPS: 725 bandwidth = nports * 10000; 726 break; 727 case AD_LINK_SPEED_14000MBPS: 728 bandwidth = nports * 14000; 729 break; 730 case AD_LINK_SPEED_20000MBPS: 731 bandwidth = nports * 20000; 732 break; 733 case AD_LINK_SPEED_25000MBPS: 734 bandwidth = nports * 25000; 735 break; 736 case AD_LINK_SPEED_40000MBPS: 737 bandwidth = nports * 40000; 738 break; 739 case AD_LINK_SPEED_50000MBPS: 740 bandwidth = nports * 50000; 741 break; 742 case AD_LINK_SPEED_56000MBPS: 743 bandwidth = nports * 56000; 744 break; 745 case AD_LINK_SPEED_100000MBPS: 746 bandwidth = nports * 100000; 747 break; 748 case AD_LINK_SPEED_200000MBPS: 749 bandwidth = nports * 200000; 750 break; 751 case AD_LINK_SPEED_400000MBPS: 752 bandwidth = nports * 400000; 753 break; 754 default: 755 bandwidth = 0; /* to silence the compiler */ 756 } 757 } 758 return bandwidth; 759 } 760 761 /** 762 * __get_active_agg - get the current active aggregator 763 * @aggregator: the aggregator we're looking at 764 * 765 * Caller must hold RCU lock. 766 */ 767 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 768 { 769 struct bonding *bond = aggregator->slave->bond; 770 struct list_head *iter; 771 struct slave *slave; 772 773 bond_for_each_slave_rcu(bond, slave, iter) 774 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 775 return &(SLAVE_AD_INFO(slave)->aggregator); 776 777 return NULL; 778 } 779 780 /** 781 * __update_lacpdu_from_port - update a port's lacpdu fields 782 * @port: the port we're looking at 783 */ 784 static inline void __update_lacpdu_from_port(struct port *port) 785 { 786 struct lacpdu *lacpdu = &port->lacpdu; 787 const struct port_params *partner = &port->partner_oper; 788 789 /* update current actual Actor parameters 790 * lacpdu->subtype initialized 791 * lacpdu->version_number initialized 792 * lacpdu->tlv_type_actor_info initialized 793 * lacpdu->actor_information_length initialized 794 */ 795 796 lacpdu->actor_system_priority = htons(port->actor_system_priority); 797 lacpdu->actor_system = port->actor_system; 798 lacpdu->actor_key = htons(port->actor_oper_port_key); 799 lacpdu->actor_port_priority = htons(port->actor_port_priority); 800 lacpdu->actor_port = htons(port->actor_port_number); 801 lacpdu->actor_state = port->actor_oper_port_state; 802 slave_dbg(port->slave->bond->dev, port->slave->dev, 803 "update lacpdu: actor port state %x\n", 804 port->actor_oper_port_state); 805 806 /* lacpdu->reserved_3_1 initialized 807 * lacpdu->tlv_type_partner_info initialized 808 * lacpdu->partner_information_length initialized 809 */ 810 811 lacpdu->partner_system_priority = htons(partner->system_priority); 812 lacpdu->partner_system = partner->system; 813 lacpdu->partner_key = htons(partner->key); 814 lacpdu->partner_port_priority = htons(partner->port_priority); 815 lacpdu->partner_port = htons(partner->port_number); 816 lacpdu->partner_state = partner->port_state; 817 818 /* lacpdu->reserved_3_2 initialized 819 * lacpdu->tlv_type_collector_info initialized 820 * lacpdu->collector_information_length initialized 821 * collector_max_delay initialized 822 * reserved_12[12] initialized 823 * tlv_type_terminator initialized 824 * terminator_length initialized 825 * reserved_50[50] initialized 826 */ 827 } 828 829 /* ================= main 802.3ad protocol code ========================= */ 830 831 /** 832 * ad_lacpdu_send - send out a lacpdu packet on a given port 833 * @port: the port we're looking at 834 * 835 * Returns: 0 on success 836 * < 0 on error 837 */ 838 static int ad_lacpdu_send(struct port *port) 839 { 840 struct slave *slave = port->slave; 841 struct sk_buff *skb; 842 struct lacpdu_header *lacpdu_header; 843 int length = sizeof(struct lacpdu_header); 844 845 skb = dev_alloc_skb(length); 846 if (!skb) 847 return -ENOMEM; 848 849 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx); 850 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx); 851 852 skb->dev = slave->dev; 853 skb_reset_mac_header(skb); 854 skb->network_header = skb->mac_header + ETH_HLEN; 855 skb->protocol = PKT_TYPE_LACPDU; 856 skb->priority = TC_PRIO_CONTROL; 857 858 lacpdu_header = skb_put(skb, length); 859 860 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 861 /* Note: source address is set to be the member's PERMANENT address, 862 * because we use it to identify loopback lacpdus in receive. 863 */ 864 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 865 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 866 867 lacpdu_header->lacpdu = port->lacpdu; 868 869 dev_queue_xmit(skb); 870 871 return 0; 872 } 873 874 /** 875 * ad_marker_send - send marker information/response on a given port 876 * @port: the port we're looking at 877 * @marker: marker data to send 878 * 879 * Returns: 0 on success 880 * < 0 on error 881 */ 882 static int ad_marker_send(struct port *port, struct bond_marker *marker) 883 { 884 struct slave *slave = port->slave; 885 struct sk_buff *skb; 886 struct bond_marker_header *marker_header; 887 int length = sizeof(struct bond_marker_header); 888 889 skb = dev_alloc_skb(length + 16); 890 if (!skb) 891 return -ENOMEM; 892 893 switch (marker->tlv_type) { 894 case AD_MARKER_INFORMATION_SUBTYPE: 895 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx); 896 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx); 897 break; 898 case AD_MARKER_RESPONSE_SUBTYPE: 899 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx); 900 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx); 901 break; 902 } 903 904 skb_reserve(skb, 16); 905 906 skb->dev = slave->dev; 907 skb_reset_mac_header(skb); 908 skb->network_header = skb->mac_header + ETH_HLEN; 909 skb->protocol = PKT_TYPE_LACPDU; 910 911 marker_header = skb_put(skb, length); 912 913 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 914 /* Note: source address is set to be the member's PERMANENT address, 915 * because we use it to identify loopback MARKERs in receive. 916 */ 917 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 918 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 919 920 marker_header->marker = *marker; 921 922 dev_queue_xmit(skb); 923 924 return 0; 925 } 926 927 /** 928 * ad_mux_machine - handle a port's mux state machine 929 * @port: the port we're looking at 930 * @update_slave_arr: Does slave array need update? 931 */ 932 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 933 { 934 mux_states_t last_state; 935 936 /* keep current State Machine state to compare later if it was 937 * changed 938 */ 939 last_state = port->sm_mux_state; 940 941 if (port->sm_vars & AD_PORT_BEGIN) { 942 port->sm_mux_state = AD_MUX_DETACHED; 943 } else { 944 switch (port->sm_mux_state) { 945 case AD_MUX_DETACHED: 946 if ((port->sm_vars & AD_PORT_SELECTED) 947 || (port->sm_vars & AD_PORT_STANDBY)) 948 /* if SELECTED or STANDBY */ 949 port->sm_mux_state = AD_MUX_WAITING; 950 break; 951 case AD_MUX_WAITING: 952 /* if SELECTED == FALSE return to DETACH state */ 953 if (!(port->sm_vars & AD_PORT_SELECTED)) { 954 port->sm_vars &= ~AD_PORT_READY_N; 955 /* in order to withhold the Selection Logic to 956 * check all ports READY_N value every callback 957 * cycle to update ready variable, we check 958 * READY_N and update READY here 959 */ 960 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 961 port->sm_mux_state = AD_MUX_DETACHED; 962 break; 963 } 964 965 /* check if the wait_while_timer expired */ 966 if (port->sm_mux_timer_counter 967 && !(--port->sm_mux_timer_counter)) 968 port->sm_vars |= AD_PORT_READY_N; 969 970 /* in order to withhold the selection logic to check 971 * all ports READY_N value every callback cycle to 972 * update ready variable, we check READY_N and update 973 * READY here 974 */ 975 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 976 977 /* if the wait_while_timer expired, and the port is 978 * in READY state, move to ATTACHED state 979 */ 980 if ((port->sm_vars & AD_PORT_READY) 981 && !port->sm_mux_timer_counter) 982 port->sm_mux_state = AD_MUX_ATTACHED; 983 break; 984 case AD_MUX_ATTACHED: 985 /* check also if agg_select_timer expired (so the 986 * edable port will take place only after this timer) 987 */ 988 if ((port->sm_vars & AD_PORT_SELECTED) && 989 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) && 990 !__check_agg_selection_timer(port)) { 991 if (port->aggregator->is_active) 992 port->sm_mux_state = 993 AD_MUX_COLLECTING_DISTRIBUTING; 994 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 995 (port->sm_vars & AD_PORT_STANDBY)) { 996 /* if UNSELECTED or STANDBY */ 997 port->sm_vars &= ~AD_PORT_READY_N; 998 /* in order to withhold the selection logic to 999 * check all ports READY_N value every callback 1000 * cycle to update ready variable, we check 1001 * READY_N and update READY here 1002 */ 1003 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 1004 port->sm_mux_state = AD_MUX_DETACHED; 1005 } else if (port->aggregator->is_active) { 1006 port->actor_oper_port_state |= 1007 LACP_STATE_SYNCHRONIZATION; 1008 } 1009 break; 1010 case AD_MUX_COLLECTING_DISTRIBUTING: 1011 if (!(port->sm_vars & AD_PORT_SELECTED) || 1012 (port->sm_vars & AD_PORT_STANDBY) || 1013 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) || 1014 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) { 1015 port->sm_mux_state = AD_MUX_ATTACHED; 1016 } else { 1017 /* if port state hasn't changed make 1018 * sure that a collecting distributing 1019 * port in an active aggregator is enabled 1020 */ 1021 if (port->aggregator && 1022 port->aggregator->is_active && 1023 !__port_is_enabled(port)) { 1024 1025 __enable_port(port); 1026 } 1027 } 1028 break; 1029 default: 1030 break; 1031 } 1032 } 1033 1034 /* check if the state machine was changed */ 1035 if (port->sm_mux_state != last_state) { 1036 slave_dbg(port->slave->bond->dev, port->slave->dev, 1037 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", 1038 port->actor_port_number, 1039 last_state, 1040 port->sm_mux_state); 1041 switch (port->sm_mux_state) { 1042 case AD_MUX_DETACHED: 1043 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1044 ad_disable_collecting_distributing(port, 1045 update_slave_arr); 1046 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1047 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1048 port->ntt = true; 1049 break; 1050 case AD_MUX_WAITING: 1051 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1052 break; 1053 case AD_MUX_ATTACHED: 1054 if (port->aggregator->is_active) 1055 port->actor_oper_port_state |= 1056 LACP_STATE_SYNCHRONIZATION; 1057 else 1058 port->actor_oper_port_state &= 1059 ~LACP_STATE_SYNCHRONIZATION; 1060 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 1061 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 1062 ad_disable_collecting_distributing(port, 1063 update_slave_arr); 1064 port->ntt = true; 1065 break; 1066 case AD_MUX_COLLECTING_DISTRIBUTING: 1067 port->actor_oper_port_state |= LACP_STATE_COLLECTING; 1068 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING; 1069 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; 1070 ad_enable_collecting_distributing(port, 1071 update_slave_arr); 1072 port->ntt = true; 1073 break; 1074 default: 1075 break; 1076 } 1077 } 1078 } 1079 1080 /** 1081 * ad_rx_machine - handle a port's rx State Machine 1082 * @lacpdu: the lacpdu we've received 1083 * @port: the port we're looking at 1084 * 1085 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1086 * CURRENT. If timer expired set the state machine in the proper state. 1087 * In other cases, this function checks if we need to switch to other state. 1088 */ 1089 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1090 { 1091 rx_states_t last_state; 1092 1093 /* keep current State Machine state to compare later if it was 1094 * changed 1095 */ 1096 last_state = port->sm_rx_state; 1097 1098 if (lacpdu) { 1099 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx); 1100 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx); 1101 } 1102 /* check if state machine should change state */ 1103 1104 /* first, check if port was reinitialized */ 1105 if (port->sm_vars & AD_PORT_BEGIN) { 1106 port->sm_rx_state = AD_RX_INITIALIZE; 1107 port->sm_vars |= AD_PORT_CHURNED; 1108 /* check if port is not enabled */ 1109 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1110 port->sm_rx_state = AD_RX_PORT_DISABLED; 1111 /* check if new lacpdu arrived */ 1112 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1113 (port->sm_rx_state == AD_RX_DEFAULTED) || 1114 (port->sm_rx_state == AD_RX_CURRENT))) { 1115 if (port->sm_rx_state != AD_RX_CURRENT) 1116 port->sm_vars |= AD_PORT_CHURNED; 1117 port->sm_rx_timer_counter = 0; 1118 port->sm_rx_state = AD_RX_CURRENT; 1119 } else { 1120 /* if timer is on, and if it is expired */ 1121 if (port->sm_rx_timer_counter && 1122 !(--port->sm_rx_timer_counter)) { 1123 switch (port->sm_rx_state) { 1124 case AD_RX_EXPIRED: 1125 port->sm_rx_state = AD_RX_DEFAULTED; 1126 break; 1127 case AD_RX_CURRENT: 1128 port->sm_rx_state = AD_RX_EXPIRED; 1129 break; 1130 default: 1131 break; 1132 } 1133 } else { 1134 /* if no lacpdu arrived and no timer is on */ 1135 switch (port->sm_rx_state) { 1136 case AD_RX_PORT_DISABLED: 1137 if (port->is_enabled && 1138 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1139 port->sm_rx_state = AD_RX_EXPIRED; 1140 else if (port->is_enabled 1141 && ((port->sm_vars 1142 & AD_PORT_LACP_ENABLED) == 0)) 1143 port->sm_rx_state = AD_RX_LACP_DISABLED; 1144 break; 1145 default: 1146 break; 1147 1148 } 1149 } 1150 } 1151 1152 /* check if the State machine was changed or new lacpdu arrived */ 1153 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1154 slave_dbg(port->slave->bond->dev, port->slave->dev, 1155 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", 1156 port->actor_port_number, 1157 last_state, 1158 port->sm_rx_state); 1159 switch (port->sm_rx_state) { 1160 case AD_RX_INITIALIZE: 1161 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1162 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1163 else 1164 port->sm_vars |= AD_PORT_LACP_ENABLED; 1165 port->sm_vars &= ~AD_PORT_SELECTED; 1166 __record_default(port); 1167 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1168 port->sm_rx_state = AD_RX_PORT_DISABLED; 1169 1170 fallthrough; 1171 case AD_RX_PORT_DISABLED: 1172 port->sm_vars &= ~AD_PORT_MATCHED; 1173 break; 1174 case AD_RX_LACP_DISABLED: 1175 port->sm_vars &= ~AD_PORT_SELECTED; 1176 __record_default(port); 1177 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION; 1178 port->sm_vars |= AD_PORT_MATCHED; 1179 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1180 break; 1181 case AD_RX_EXPIRED: 1182 /* Reset of the Synchronization flag (Standard 43.4.12) 1183 * This reset cause to disable this port in the 1184 * COLLECTING_DISTRIBUTING state of the mux machine in 1185 * case of EXPIRED even if LINK_DOWN didn't arrive for 1186 * the port. 1187 */ 1188 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION; 1189 port->sm_vars &= ~AD_PORT_MATCHED; 1190 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT; 1191 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY; 1192 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1193 port->actor_oper_port_state |= LACP_STATE_EXPIRED; 1194 port->sm_vars |= AD_PORT_CHURNED; 1195 break; 1196 case AD_RX_DEFAULTED: 1197 __update_default_selected(port); 1198 __record_default(port); 1199 port->sm_vars |= AD_PORT_MATCHED; 1200 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1201 break; 1202 case AD_RX_CURRENT: 1203 /* detect loopback situation */ 1204 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1205 &(port->actor_system))) { 1206 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n" 1207 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n"); 1208 return; 1209 } 1210 __update_selected(lacpdu, port); 1211 __update_ntt(lacpdu, port); 1212 __record_pdu(lacpdu, port); 1213 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)); 1214 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; 1215 break; 1216 default: 1217 break; 1218 } 1219 } 1220 } 1221 1222 /** 1223 * ad_churn_machine - handle port churn's state machine 1224 * @port: the port we're looking at 1225 * 1226 */ 1227 static void ad_churn_machine(struct port *port) 1228 { 1229 if (port->sm_vars & AD_PORT_CHURNED) { 1230 port->sm_vars &= ~AD_PORT_CHURNED; 1231 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1232 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1233 port->sm_churn_actor_timer_counter = 1234 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1235 port->sm_churn_partner_timer_counter = 1236 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1237 return; 1238 } 1239 if (port->sm_churn_actor_timer_counter && 1240 !(--port->sm_churn_actor_timer_counter) && 1241 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1242 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) { 1243 port->sm_churn_actor_state = AD_NO_CHURN; 1244 } else { 1245 port->churn_actor_count++; 1246 port->sm_churn_actor_state = AD_CHURN; 1247 } 1248 } 1249 if (port->sm_churn_partner_timer_counter && 1250 !(--port->sm_churn_partner_timer_counter) && 1251 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1252 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) { 1253 port->sm_churn_partner_state = AD_NO_CHURN; 1254 } else { 1255 port->churn_partner_count++; 1256 port->sm_churn_partner_state = AD_CHURN; 1257 } 1258 } 1259 } 1260 1261 /** 1262 * ad_tx_machine - handle a port's tx state machine 1263 * @port: the port we're looking at 1264 */ 1265 static void ad_tx_machine(struct port *port) 1266 { 1267 /* check if tx timer expired, to verify that we do not send more than 1268 * 3 packets per second 1269 */ 1270 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1271 /* check if there is something to send */ 1272 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1273 __update_lacpdu_from_port(port); 1274 1275 if (ad_lacpdu_send(port) >= 0) { 1276 slave_dbg(port->slave->bond->dev, 1277 port->slave->dev, 1278 "Sent LACPDU on port %d\n", 1279 port->actor_port_number); 1280 1281 /* mark ntt as false, so it will not be sent 1282 * again until demanded 1283 */ 1284 port->ntt = false; 1285 } 1286 } 1287 /* restart tx timer(to verify that we will not exceed 1288 * AD_MAX_TX_IN_SECOND 1289 */ 1290 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1291 } 1292 } 1293 1294 /** 1295 * ad_periodic_machine - handle a port's periodic state machine 1296 * @port: the port we're looking at 1297 * @bond_params: bond parameters we will use 1298 * 1299 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1300 */ 1301 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params) 1302 { 1303 periodic_states_t last_state; 1304 1305 /* keep current state machine state to compare later if it was changed */ 1306 last_state = port->sm_periodic_state; 1307 1308 /* check if port was reinitialized */ 1309 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1310 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) || 1311 !bond_params->lacp_active) { 1312 port->sm_periodic_state = AD_NO_PERIODIC; 1313 } 1314 /* check if state machine should change state */ 1315 else if (port->sm_periodic_timer_counter) { 1316 /* check if periodic state machine expired */ 1317 if (!(--port->sm_periodic_timer_counter)) { 1318 /* if expired then do tx */ 1319 port->sm_periodic_state = AD_PERIODIC_TX; 1320 } else { 1321 /* If not expired, check if there is some new timeout 1322 * parameter from the partner state 1323 */ 1324 switch (port->sm_periodic_state) { 1325 case AD_FAST_PERIODIC: 1326 if (!(port->partner_oper.port_state 1327 & LACP_STATE_LACP_TIMEOUT)) 1328 port->sm_periodic_state = AD_SLOW_PERIODIC; 1329 break; 1330 case AD_SLOW_PERIODIC: 1331 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) { 1332 port->sm_periodic_timer_counter = 0; 1333 port->sm_periodic_state = AD_PERIODIC_TX; 1334 } 1335 break; 1336 default: 1337 break; 1338 } 1339 } 1340 } else { 1341 switch (port->sm_periodic_state) { 1342 case AD_NO_PERIODIC: 1343 port->sm_periodic_state = AD_FAST_PERIODIC; 1344 break; 1345 case AD_PERIODIC_TX: 1346 if (!(port->partner_oper.port_state & 1347 LACP_STATE_LACP_TIMEOUT)) 1348 port->sm_periodic_state = AD_SLOW_PERIODIC; 1349 else 1350 port->sm_periodic_state = AD_FAST_PERIODIC; 1351 break; 1352 default: 1353 break; 1354 } 1355 } 1356 1357 /* check if the state machine was changed */ 1358 if (port->sm_periodic_state != last_state) { 1359 slave_dbg(port->slave->bond->dev, port->slave->dev, 1360 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1361 port->actor_port_number, last_state, 1362 port->sm_periodic_state); 1363 switch (port->sm_periodic_state) { 1364 case AD_NO_PERIODIC: 1365 port->sm_periodic_timer_counter = 0; 1366 break; 1367 case AD_FAST_PERIODIC: 1368 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1369 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1370 break; 1371 case AD_SLOW_PERIODIC: 1372 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1373 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1374 break; 1375 case AD_PERIODIC_TX: 1376 port->ntt = true; 1377 break; 1378 default: 1379 break; 1380 } 1381 } 1382 } 1383 1384 /** 1385 * ad_port_selection_logic - select aggregation groups 1386 * @port: the port we're looking at 1387 * @update_slave_arr: Does slave array need update? 1388 * 1389 * Select aggregation groups, and assign each port for it's aggregetor. The 1390 * selection logic is called in the inititalization (after all the handshkes), 1391 * and after every lacpdu receive (if selected is off). 1392 */ 1393 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1394 { 1395 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1396 struct port *last_port = NULL, *curr_port; 1397 struct list_head *iter; 1398 struct bonding *bond; 1399 struct slave *slave; 1400 int found = 0; 1401 1402 /* if the port is already Selected, do nothing */ 1403 if (port->sm_vars & AD_PORT_SELECTED) 1404 return; 1405 1406 bond = __get_bond_by_port(port); 1407 1408 /* if the port is connected to other aggregator, detach it */ 1409 if (port->aggregator) { 1410 /* detach the port from its former aggregator */ 1411 temp_aggregator = port->aggregator; 1412 for (curr_port = temp_aggregator->lag_ports; curr_port; 1413 last_port = curr_port, 1414 curr_port = curr_port->next_port_in_aggregator) { 1415 if (curr_port == port) { 1416 temp_aggregator->num_of_ports--; 1417 /* if it is the first port attached to the 1418 * aggregator 1419 */ 1420 if (!last_port) { 1421 temp_aggregator->lag_ports = 1422 port->next_port_in_aggregator; 1423 } else { 1424 /* not the first port attached to the 1425 * aggregator 1426 */ 1427 last_port->next_port_in_aggregator = 1428 port->next_port_in_aggregator; 1429 } 1430 1431 /* clear the port's relations to this 1432 * aggregator 1433 */ 1434 port->aggregator = NULL; 1435 port->next_port_in_aggregator = NULL; 1436 port->actor_port_aggregator_identifier = 0; 1437 1438 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n", 1439 port->actor_port_number, 1440 temp_aggregator->aggregator_identifier); 1441 /* if the aggregator is empty, clear its 1442 * parameters, and set it ready to be attached 1443 */ 1444 if (!temp_aggregator->lag_ports) 1445 ad_clear_agg(temp_aggregator); 1446 break; 1447 } 1448 } 1449 if (!curr_port) { 1450 /* meaning: the port was related to an aggregator 1451 * but was not on the aggregator port list 1452 */ 1453 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n", 1454 port->slave->bond->dev->name, 1455 port->slave->dev->name, 1456 port->actor_port_number, 1457 port->aggregator->aggregator_identifier); 1458 } 1459 } 1460 /* search on all aggregators for a suitable aggregator for this port */ 1461 bond_for_each_slave(bond, slave, iter) { 1462 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1463 1464 /* keep a free aggregator for later use(if needed) */ 1465 if (!aggregator->lag_ports) { 1466 if (!free_aggregator) 1467 free_aggregator = aggregator; 1468 continue; 1469 } 1470 /* check if current aggregator suits us */ 1471 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1472 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1473 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1474 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1475 ) && 1476 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1477 !aggregator->is_individual) /* but is not individual OR */ 1478 ) 1479 ) { 1480 /* attach to the founded aggregator */ 1481 port->aggregator = aggregator; 1482 port->actor_port_aggregator_identifier = 1483 port->aggregator->aggregator_identifier; 1484 port->next_port_in_aggregator = aggregator->lag_ports; 1485 port->aggregator->num_of_ports++; 1486 aggregator->lag_ports = port; 1487 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n", 1488 port->actor_port_number, 1489 port->aggregator->aggregator_identifier); 1490 1491 /* mark this port as selected */ 1492 port->sm_vars |= AD_PORT_SELECTED; 1493 found = 1; 1494 break; 1495 } 1496 } 1497 1498 /* the port couldn't find an aggregator - attach it to a new 1499 * aggregator 1500 */ 1501 if (!found) { 1502 if (free_aggregator) { 1503 /* assign port a new aggregator */ 1504 port->aggregator = free_aggregator; 1505 port->actor_port_aggregator_identifier = 1506 port->aggregator->aggregator_identifier; 1507 1508 /* update the new aggregator's parameters 1509 * if port was responsed from the end-user 1510 */ 1511 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1512 /* if port is full duplex */ 1513 port->aggregator->is_individual = false; 1514 else 1515 port->aggregator->is_individual = true; 1516 1517 port->aggregator->actor_admin_aggregator_key = 1518 port->actor_admin_port_key; 1519 port->aggregator->actor_oper_aggregator_key = 1520 port->actor_oper_port_key; 1521 port->aggregator->partner_system = 1522 port->partner_oper.system; 1523 port->aggregator->partner_system_priority = 1524 port->partner_oper.system_priority; 1525 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1526 port->aggregator->receive_state = 1; 1527 port->aggregator->transmit_state = 1; 1528 port->aggregator->lag_ports = port; 1529 port->aggregator->num_of_ports++; 1530 1531 /* mark this port as selected */ 1532 port->sm_vars |= AD_PORT_SELECTED; 1533 1534 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n", 1535 port->actor_port_number, 1536 port->aggregator->aggregator_identifier); 1537 } else { 1538 slave_err(bond->dev, port->slave->dev, 1539 "Port %d did not find a suitable aggregator\n", 1540 port->actor_port_number); 1541 } 1542 } 1543 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1544 * in all aggregator's ports, else set ready=FALSE in all 1545 * aggregator's ports 1546 */ 1547 __set_agg_ports_ready(port->aggregator, 1548 __agg_ports_are_ready(port->aggregator)); 1549 1550 aggregator = __get_first_agg(port); 1551 ad_agg_selection_logic(aggregator, update_slave_arr); 1552 1553 if (!port->aggregator->is_active) 1554 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 1555 } 1556 1557 /* Decide if "agg" is a better choice for the new active aggregator that 1558 * the current best, according to the ad_select policy. 1559 */ 1560 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1561 struct aggregator *curr) 1562 { 1563 /* 0. If no best, select current. 1564 * 1565 * 1. If the current agg is not individual, and the best is 1566 * individual, select current. 1567 * 1568 * 2. If current agg is individual and the best is not, keep best. 1569 * 1570 * 3. Therefore, current and best are both individual or both not 1571 * individual, so: 1572 * 1573 * 3a. If current agg partner replied, and best agg partner did not, 1574 * select current. 1575 * 1576 * 3b. If current agg partner did not reply and best agg partner 1577 * did reply, keep best. 1578 * 1579 * 4. Therefore, current and best both have partner replies or 1580 * both do not, so perform selection policy: 1581 * 1582 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1583 * select by bandwidth. 1584 * 1585 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1586 */ 1587 if (!best) 1588 return curr; 1589 1590 if (!curr->is_individual && best->is_individual) 1591 return curr; 1592 1593 if (curr->is_individual && !best->is_individual) 1594 return best; 1595 1596 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1597 return curr; 1598 1599 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1600 return best; 1601 1602 switch (__get_agg_selection_mode(curr->lag_ports)) { 1603 case BOND_AD_COUNT: 1604 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1605 return curr; 1606 1607 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1608 return best; 1609 1610 fallthrough; 1611 case BOND_AD_STABLE: 1612 case BOND_AD_BANDWIDTH: 1613 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1614 return curr; 1615 1616 break; 1617 1618 default: 1619 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n", 1620 curr->slave->bond->dev->name, 1621 curr->slave->dev->name, 1622 __get_agg_selection_mode(curr->lag_ports)); 1623 break; 1624 } 1625 1626 return best; 1627 } 1628 1629 static int agg_device_up(const struct aggregator *agg) 1630 { 1631 struct port *port = agg->lag_ports; 1632 1633 if (!port) 1634 return 0; 1635 1636 for (port = agg->lag_ports; port; 1637 port = port->next_port_in_aggregator) { 1638 if (netif_running(port->slave->dev) && 1639 netif_carrier_ok(port->slave->dev)) 1640 return 1; 1641 } 1642 1643 return 0; 1644 } 1645 1646 /** 1647 * ad_agg_selection_logic - select an aggregation group for a team 1648 * @agg: the aggregator we're looking at 1649 * @update_slave_arr: Does slave array need update? 1650 * 1651 * It is assumed that only one aggregator may be selected for a team. 1652 * 1653 * The logic of this function is to select the aggregator according to 1654 * the ad_select policy: 1655 * 1656 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1657 * it, and to reselect the active aggregator only if the previous 1658 * aggregator has no more ports related to it. 1659 * 1660 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1661 * bandwidth, and reselect whenever a link state change takes place or the 1662 * set of slaves in the bond changes. 1663 * 1664 * BOND_AD_COUNT: select the aggregator with largest number of ports 1665 * (slaves), and reselect whenever a link state change takes place or the 1666 * set of slaves in the bond changes. 1667 * 1668 * FIXME: this function MUST be called with the first agg in the bond, or 1669 * __get_active_agg() won't work correctly. This function should be better 1670 * called with the bond itself, and retrieve the first agg from it. 1671 */ 1672 static void ad_agg_selection_logic(struct aggregator *agg, 1673 bool *update_slave_arr) 1674 { 1675 struct aggregator *best, *active, *origin; 1676 struct bonding *bond = agg->slave->bond; 1677 struct list_head *iter; 1678 struct slave *slave; 1679 struct port *port; 1680 1681 rcu_read_lock(); 1682 origin = agg; 1683 active = __get_active_agg(agg); 1684 best = (active && agg_device_up(active)) ? active : NULL; 1685 1686 bond_for_each_slave_rcu(bond, slave, iter) { 1687 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1688 1689 agg->is_active = 0; 1690 1691 if (__agg_active_ports(agg) && agg_device_up(agg)) 1692 best = ad_agg_selection_test(best, agg); 1693 } 1694 1695 if (best && 1696 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1697 /* For the STABLE policy, don't replace the old active 1698 * aggregator if it's still active (it has an answering 1699 * partner) or if both the best and active don't have an 1700 * answering partner. 1701 */ 1702 if (active && active->lag_ports && 1703 __agg_active_ports(active) && 1704 (__agg_has_partner(active) || 1705 (!__agg_has_partner(active) && 1706 !__agg_has_partner(best)))) { 1707 if (!(!active->actor_oper_aggregator_key && 1708 best->actor_oper_aggregator_key)) { 1709 best = NULL; 1710 active->is_active = 1; 1711 } 1712 } 1713 } 1714 1715 if (best && (best == active)) { 1716 best = NULL; 1717 active->is_active = 1; 1718 } 1719 1720 /* if there is new best aggregator, activate it */ 1721 if (best) { 1722 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1723 best->slave ? best->slave->dev->name : "NULL", 1724 best->aggregator_identifier, best->num_of_ports, 1725 best->actor_oper_aggregator_key, 1726 best->partner_oper_aggregator_key, 1727 best->is_individual, best->is_active); 1728 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n", 1729 best->slave ? best->slave->dev->name : "NULL", 1730 best->lag_ports, best->slave); 1731 1732 bond_for_each_slave_rcu(bond, slave, iter) { 1733 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1734 1735 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1736 agg->aggregator_identifier, agg->num_of_ports, 1737 agg->actor_oper_aggregator_key, 1738 agg->partner_oper_aggregator_key, 1739 agg->is_individual, agg->is_active); 1740 } 1741 1742 /* check if any partner replies */ 1743 if (best->is_individual) 1744 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1745 bond->dev->name); 1746 1747 best->is_active = 1; 1748 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n", 1749 best->slave ? best->slave->dev->name : "NULL", 1750 best->aggregator_identifier); 1751 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1752 best->slave ? best->slave->dev->name : "NULL", 1753 best->aggregator_identifier, best->num_of_ports, 1754 best->actor_oper_aggregator_key, 1755 best->partner_oper_aggregator_key, 1756 best->is_individual, best->is_active); 1757 1758 /* disable the ports that were related to the former 1759 * active_aggregator 1760 */ 1761 if (active) { 1762 for (port = active->lag_ports; port; 1763 port = port->next_port_in_aggregator) { 1764 __disable_port(port); 1765 } 1766 } 1767 /* Slave array needs update. */ 1768 *update_slave_arr = true; 1769 } 1770 1771 /* if the selected aggregator is of join individuals 1772 * (partner_system is NULL), enable their ports 1773 */ 1774 active = __get_active_agg(origin); 1775 1776 if (active) { 1777 if (!__agg_has_partner(active)) { 1778 for (port = active->lag_ports; port; 1779 port = port->next_port_in_aggregator) { 1780 __enable_port(port); 1781 } 1782 } 1783 } 1784 1785 rcu_read_unlock(); 1786 1787 bond_3ad_set_carrier(bond); 1788 } 1789 1790 /** 1791 * ad_clear_agg - clear a given aggregator's parameters 1792 * @aggregator: the aggregator we're looking at 1793 */ 1794 static void ad_clear_agg(struct aggregator *aggregator) 1795 { 1796 if (aggregator) { 1797 aggregator->is_individual = false; 1798 aggregator->actor_admin_aggregator_key = 0; 1799 aggregator->actor_oper_aggregator_key = 0; 1800 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1801 aggregator->partner_system_priority = 0; 1802 aggregator->partner_oper_aggregator_key = 0; 1803 aggregator->receive_state = 0; 1804 aggregator->transmit_state = 0; 1805 aggregator->lag_ports = NULL; 1806 aggregator->is_active = 0; 1807 aggregator->num_of_ports = 0; 1808 pr_debug("%s: LAG %d was cleared\n", 1809 aggregator->slave ? 1810 aggregator->slave->dev->name : "NULL", 1811 aggregator->aggregator_identifier); 1812 } 1813 } 1814 1815 /** 1816 * ad_initialize_agg - initialize a given aggregator's parameters 1817 * @aggregator: the aggregator we're looking at 1818 */ 1819 static void ad_initialize_agg(struct aggregator *aggregator) 1820 { 1821 if (aggregator) { 1822 ad_clear_agg(aggregator); 1823 1824 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1825 aggregator->aggregator_identifier = 0; 1826 aggregator->slave = NULL; 1827 } 1828 } 1829 1830 /** 1831 * ad_initialize_port - initialize a given port's parameters 1832 * @port: the port we're looking at 1833 * @lacp_fast: boolean. whether fast periodic should be used 1834 */ 1835 static void ad_initialize_port(struct port *port, int lacp_fast) 1836 { 1837 static const struct port_params tmpl = { 1838 .system_priority = 0xffff, 1839 .key = 1, 1840 .port_number = 1, 1841 .port_priority = 0xff, 1842 .port_state = 1, 1843 }; 1844 static const struct lacpdu lacpdu = { 1845 .subtype = 0x01, 1846 .version_number = 0x01, 1847 .tlv_type_actor_info = 0x01, 1848 .actor_information_length = 0x14, 1849 .tlv_type_partner_info = 0x02, 1850 .partner_information_length = 0x14, 1851 .tlv_type_collector_info = 0x03, 1852 .collector_information_length = 0x10, 1853 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1854 }; 1855 1856 if (port) { 1857 port->actor_port_priority = 0xff; 1858 port->actor_port_aggregator_identifier = 0; 1859 port->ntt = false; 1860 port->actor_admin_port_state = LACP_STATE_AGGREGATION | 1861 LACP_STATE_LACP_ACTIVITY; 1862 port->actor_oper_port_state = LACP_STATE_AGGREGATION | 1863 LACP_STATE_LACP_ACTIVITY; 1864 1865 if (lacp_fast) 1866 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 1867 1868 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1869 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1870 1871 port->is_enabled = true; 1872 /* private parameters */ 1873 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1874 port->sm_rx_state = 0; 1875 port->sm_rx_timer_counter = 0; 1876 port->sm_periodic_state = 0; 1877 port->sm_periodic_timer_counter = 0; 1878 port->sm_mux_state = 0; 1879 port->sm_mux_timer_counter = 0; 1880 port->sm_tx_state = 0; 1881 port->aggregator = NULL; 1882 port->next_port_in_aggregator = NULL; 1883 port->transaction_id = 0; 1884 1885 port->sm_churn_actor_timer_counter = 0; 1886 port->sm_churn_actor_state = 0; 1887 port->churn_actor_count = 0; 1888 port->sm_churn_partner_timer_counter = 0; 1889 port->sm_churn_partner_state = 0; 1890 port->churn_partner_count = 0; 1891 1892 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1893 } 1894 } 1895 1896 /** 1897 * ad_enable_collecting_distributing - enable a port's transmit/receive 1898 * @port: the port we're looking at 1899 * @update_slave_arr: Does slave array need update? 1900 * 1901 * Enable @port if it's in an active aggregator 1902 */ 1903 static void ad_enable_collecting_distributing(struct port *port, 1904 bool *update_slave_arr) 1905 { 1906 if (port->aggregator->is_active) { 1907 slave_dbg(port->slave->bond->dev, port->slave->dev, 1908 "Enabling port %d (LAG %d)\n", 1909 port->actor_port_number, 1910 port->aggregator->aggregator_identifier); 1911 __enable_port(port); 1912 /* Slave array needs update */ 1913 *update_slave_arr = true; 1914 } 1915 } 1916 1917 /** 1918 * ad_disable_collecting_distributing - disable a port's transmit/receive 1919 * @port: the port we're looking at 1920 * @update_slave_arr: Does slave array need update? 1921 */ 1922 static void ad_disable_collecting_distributing(struct port *port, 1923 bool *update_slave_arr) 1924 { 1925 if (port->aggregator && 1926 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1927 &(null_mac_addr))) { 1928 slave_dbg(port->slave->bond->dev, port->slave->dev, 1929 "Disabling port %d (LAG %d)\n", 1930 port->actor_port_number, 1931 port->aggregator->aggregator_identifier); 1932 __disable_port(port); 1933 /* Slave array needs an update */ 1934 *update_slave_arr = true; 1935 } 1936 } 1937 1938 /** 1939 * ad_marker_info_received - handle receive of a Marker information frame 1940 * @marker_info: Marker info received 1941 * @port: the port we're looking at 1942 */ 1943 static void ad_marker_info_received(struct bond_marker *marker_info, 1944 struct port *port) 1945 { 1946 struct bond_marker marker; 1947 1948 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx); 1949 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx); 1950 1951 /* copy the received marker data to the response marker */ 1952 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1953 /* change the marker subtype to marker response */ 1954 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1955 1956 /* send the marker response */ 1957 if (ad_marker_send(port, &marker) >= 0) 1958 slave_dbg(port->slave->bond->dev, port->slave->dev, 1959 "Sent Marker Response on port %d\n", 1960 port->actor_port_number); 1961 } 1962 1963 /** 1964 * ad_marker_response_received - handle receive of a marker response frame 1965 * @marker: marker PDU received 1966 * @port: the port we're looking at 1967 * 1968 * This function does nothing since we decided not to implement send and handle 1969 * response for marker PDU's, in this stage, but only to respond to marker 1970 * information. 1971 */ 1972 static void ad_marker_response_received(struct bond_marker *marker, 1973 struct port *port) 1974 { 1975 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx); 1976 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx); 1977 1978 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1979 } 1980 1981 /* ========= AD exported functions to the main bonding code ========= */ 1982 1983 /* Check aggregators status in team every T seconds */ 1984 #define AD_AGGREGATOR_SELECTION_TIMER 8 1985 1986 /** 1987 * bond_3ad_initiate_agg_selection - initate aggregator selection 1988 * @bond: bonding struct 1989 * @timeout: timeout value to set 1990 * 1991 * Set the aggregation selection timer, to initiate an agg selection in 1992 * the very near future. Called during first initialization, and during 1993 * any down to up transitions of the bond. 1994 */ 1995 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1996 { 1997 BOND_AD_INFO(bond).agg_select_timer = timeout; 1998 } 1999 2000 /** 2001 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 2002 * @bond: bonding struct to work on 2003 * @tick_resolution: tick duration (millisecond resolution) 2004 * 2005 * Can be called only after the mac address of the bond is set. 2006 */ 2007 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 2008 { 2009 /* check that the bond is not initialized yet */ 2010 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 2011 bond->dev->dev_addr)) { 2012 2013 BOND_AD_INFO(bond).aggregator_identifier = 0; 2014 2015 BOND_AD_INFO(bond).system.sys_priority = 2016 bond->params.ad_actor_sys_prio; 2017 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2018 BOND_AD_INFO(bond).system.sys_mac_addr = 2019 *((struct mac_addr *)bond->dev->dev_addr); 2020 else 2021 BOND_AD_INFO(bond).system.sys_mac_addr = 2022 *((struct mac_addr *)bond->params.ad_actor_system); 2023 2024 /* initialize how many times this module is called in one 2025 * second (should be about every 100ms) 2026 */ 2027 ad_ticks_per_sec = tick_resolution; 2028 2029 bond_3ad_initiate_agg_selection(bond, 2030 AD_AGGREGATOR_SELECTION_TIMER * 2031 ad_ticks_per_sec); 2032 } 2033 } 2034 2035 /** 2036 * bond_3ad_bind_slave - initialize a slave's port 2037 * @slave: slave struct to work on 2038 * 2039 * Returns: 0 on success 2040 * < 0 on error 2041 */ 2042 void bond_3ad_bind_slave(struct slave *slave) 2043 { 2044 struct bonding *bond = bond_get_bond_by_slave(slave); 2045 struct port *port; 2046 struct aggregator *aggregator; 2047 2048 /* check that the slave has not been initialized yet. */ 2049 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2050 2051 /* port initialization */ 2052 port = &(SLAVE_AD_INFO(slave)->port); 2053 2054 ad_initialize_port(port, bond->params.lacp_fast); 2055 2056 port->slave = slave; 2057 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2058 /* key is determined according to the link speed, duplex and 2059 * user key 2060 */ 2061 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2062 ad_update_actor_keys(port, false); 2063 /* actor system is the bond's system */ 2064 __ad_actor_update_port(port); 2065 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2066 * lacpdu's are sent in one second) 2067 */ 2068 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2069 2070 __disable_port(port); 2071 2072 /* aggregator initialization */ 2073 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2074 2075 ad_initialize_agg(aggregator); 2076 2077 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2078 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2079 aggregator->slave = slave; 2080 aggregator->is_active = 0; 2081 aggregator->num_of_ports = 0; 2082 } 2083 } 2084 2085 /** 2086 * bond_3ad_unbind_slave - deinitialize a slave's port 2087 * @slave: slave struct to work on 2088 * 2089 * Search for the aggregator that is related to this port, remove the 2090 * aggregator and assign another aggregator for other port related to it 2091 * (if any), and remove the port. 2092 */ 2093 void bond_3ad_unbind_slave(struct slave *slave) 2094 { 2095 struct port *port, *prev_port, *temp_port; 2096 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2097 int select_new_active_agg = 0; 2098 struct bonding *bond = slave->bond; 2099 struct slave *slave_iter; 2100 struct list_head *iter; 2101 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2102 2103 /* Sync against bond_3ad_state_machine_handler() */ 2104 spin_lock_bh(&bond->mode_lock); 2105 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2106 port = &(SLAVE_AD_INFO(slave)->port); 2107 2108 /* if slave is null, the whole port is not initialized */ 2109 if (!port->slave) { 2110 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n"); 2111 goto out; 2112 } 2113 2114 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n", 2115 aggregator->aggregator_identifier); 2116 2117 /* Tell the partner that this port is not suitable for aggregation */ 2118 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; 2119 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; 2120 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; 2121 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION; 2122 __update_lacpdu_from_port(port); 2123 ad_lacpdu_send(port); 2124 2125 /* check if this aggregator is occupied */ 2126 if (aggregator->lag_ports) { 2127 /* check if there are other ports related to this aggregator 2128 * except the port related to this slave(thats ensure us that 2129 * there is a reason to search for new aggregator, and that we 2130 * will find one 2131 */ 2132 if ((aggregator->lag_ports != port) || 2133 (aggregator->lag_ports->next_port_in_aggregator)) { 2134 /* find new aggregator for the related port(s) */ 2135 bond_for_each_slave(bond, slave_iter, iter) { 2136 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2137 /* if the new aggregator is empty, or it is 2138 * connected to our port only 2139 */ 2140 if (!new_aggregator->lag_ports || 2141 ((new_aggregator->lag_ports == port) && 2142 !new_aggregator->lag_ports->next_port_in_aggregator)) 2143 break; 2144 } 2145 if (!slave_iter) 2146 new_aggregator = NULL; 2147 2148 /* if new aggregator found, copy the aggregator's 2149 * parameters and connect the related lag_ports to the 2150 * new aggregator 2151 */ 2152 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2153 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2154 aggregator->aggregator_identifier, 2155 new_aggregator->aggregator_identifier); 2156 2157 if ((new_aggregator->lag_ports == port) && 2158 new_aggregator->is_active) { 2159 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2160 select_new_active_agg = 1; 2161 } 2162 2163 new_aggregator->is_individual = aggregator->is_individual; 2164 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2165 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2166 new_aggregator->partner_system = aggregator->partner_system; 2167 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2168 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2169 new_aggregator->receive_state = aggregator->receive_state; 2170 new_aggregator->transmit_state = aggregator->transmit_state; 2171 new_aggregator->lag_ports = aggregator->lag_ports; 2172 new_aggregator->is_active = aggregator->is_active; 2173 new_aggregator->num_of_ports = aggregator->num_of_ports; 2174 2175 /* update the information that is written on 2176 * the ports about the aggregator 2177 */ 2178 for (temp_port = aggregator->lag_ports; temp_port; 2179 temp_port = temp_port->next_port_in_aggregator) { 2180 temp_port->aggregator = new_aggregator; 2181 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2182 } 2183 2184 ad_clear_agg(aggregator); 2185 2186 if (select_new_active_agg) 2187 ad_agg_selection_logic(__get_first_agg(port), 2188 &dummy_slave_update); 2189 } else { 2190 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2191 } 2192 } else { 2193 /* in case that the only port related to this 2194 * aggregator is the one we want to remove 2195 */ 2196 select_new_active_agg = aggregator->is_active; 2197 ad_clear_agg(aggregator); 2198 if (select_new_active_agg) { 2199 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2200 /* select new active aggregator */ 2201 temp_aggregator = __get_first_agg(port); 2202 if (temp_aggregator) 2203 ad_agg_selection_logic(temp_aggregator, 2204 &dummy_slave_update); 2205 } 2206 } 2207 } 2208 2209 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number); 2210 2211 /* find the aggregator that this port is connected to */ 2212 bond_for_each_slave(bond, slave_iter, iter) { 2213 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2214 prev_port = NULL; 2215 /* search the port in the aggregator's related ports */ 2216 for (temp_port = temp_aggregator->lag_ports; temp_port; 2217 prev_port = temp_port, 2218 temp_port = temp_port->next_port_in_aggregator) { 2219 if (temp_port == port) { 2220 /* the aggregator found - detach the port from 2221 * this aggregator 2222 */ 2223 if (prev_port) 2224 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2225 else 2226 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2227 temp_aggregator->num_of_ports--; 2228 if (__agg_active_ports(temp_aggregator) == 0) { 2229 select_new_active_agg = temp_aggregator->is_active; 2230 ad_clear_agg(temp_aggregator); 2231 if (select_new_active_agg) { 2232 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); 2233 /* select new active aggregator */ 2234 ad_agg_selection_logic(__get_first_agg(port), 2235 &dummy_slave_update); 2236 } 2237 } 2238 break; 2239 } 2240 } 2241 } 2242 port->slave = NULL; 2243 2244 out: 2245 spin_unlock_bh(&bond->mode_lock); 2246 } 2247 2248 /** 2249 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2250 * @bond: bonding struct to work on 2251 * 2252 * If an ad_actor setting gets changed we need to update the individual port 2253 * settings so the bond device will use the new values when it gets upped. 2254 */ 2255 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2256 { 2257 struct list_head *iter; 2258 struct slave *slave; 2259 2260 ASSERT_RTNL(); 2261 2262 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2263 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2264 BOND_AD_INFO(bond).system.sys_mac_addr = 2265 *((struct mac_addr *)bond->dev->dev_addr); 2266 else 2267 BOND_AD_INFO(bond).system.sys_mac_addr = 2268 *((struct mac_addr *)bond->params.ad_actor_system); 2269 2270 spin_lock_bh(&bond->mode_lock); 2271 bond_for_each_slave(bond, slave, iter) { 2272 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2273 2274 __ad_actor_update_port(port); 2275 port->ntt = true; 2276 } 2277 spin_unlock_bh(&bond->mode_lock); 2278 } 2279 2280 /** 2281 * bond_3ad_state_machine_handler - handle state machines timeout 2282 * @work: work context to fetch bonding struct to work on from 2283 * 2284 * The state machine handling concept in this module is to check every tick 2285 * which state machine should operate any function. The execution order is 2286 * round robin, so when we have an interaction between state machines, the 2287 * reply of one to each other might be delayed until next tick. 2288 * 2289 * This function also complete the initialization when the agg_select_timer 2290 * times out, and it selects an aggregator for the ports that are yet not 2291 * related to any aggregator, and selects the active aggregator for a bond. 2292 */ 2293 void bond_3ad_state_machine_handler(struct work_struct *work) 2294 { 2295 struct bonding *bond = container_of(work, struct bonding, 2296 ad_work.work); 2297 struct aggregator *aggregator; 2298 struct list_head *iter; 2299 struct slave *slave; 2300 struct port *port; 2301 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2302 bool update_slave_arr = false; 2303 2304 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2305 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2306 * concurrently due to incoming LACPDU as well. 2307 */ 2308 spin_lock_bh(&bond->mode_lock); 2309 rcu_read_lock(); 2310 2311 /* check if there are any slaves */ 2312 if (!bond_has_slaves(bond)) 2313 goto re_arm; 2314 2315 /* check if agg_select_timer timer after initialize is timed out */ 2316 if (BOND_AD_INFO(bond).agg_select_timer && 2317 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2318 slave = bond_first_slave_rcu(bond); 2319 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2320 2321 /* select the active aggregator for the bond */ 2322 if (port) { 2323 if (!port->slave) { 2324 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2325 bond->dev->name); 2326 goto re_arm; 2327 } 2328 2329 aggregator = __get_first_agg(port); 2330 ad_agg_selection_logic(aggregator, &update_slave_arr); 2331 } 2332 bond_3ad_set_carrier(bond); 2333 } 2334 2335 /* for each port run the state machines */ 2336 bond_for_each_slave_rcu(bond, slave, iter) { 2337 port = &(SLAVE_AD_INFO(slave)->port); 2338 if (!port->slave) { 2339 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2340 bond->dev->name); 2341 goto re_arm; 2342 } 2343 2344 ad_rx_machine(NULL, port); 2345 ad_periodic_machine(port, &bond->params); 2346 ad_port_selection_logic(port, &update_slave_arr); 2347 ad_mux_machine(port, &update_slave_arr); 2348 ad_tx_machine(port); 2349 ad_churn_machine(port); 2350 2351 /* turn off the BEGIN bit, since we already handled it */ 2352 if (port->sm_vars & AD_PORT_BEGIN) 2353 port->sm_vars &= ~AD_PORT_BEGIN; 2354 } 2355 2356 re_arm: 2357 bond_for_each_slave_rcu(bond, slave, iter) { 2358 if (slave->should_notify) { 2359 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2360 break; 2361 } 2362 } 2363 rcu_read_unlock(); 2364 spin_unlock_bh(&bond->mode_lock); 2365 2366 if (update_slave_arr) 2367 bond_slave_arr_work_rearm(bond, 0); 2368 2369 if (should_notify_rtnl && rtnl_trylock()) { 2370 bond_slave_state_notify(bond); 2371 rtnl_unlock(); 2372 } 2373 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2374 } 2375 2376 /** 2377 * bond_3ad_rx_indication - handle a received frame 2378 * @lacpdu: received lacpdu 2379 * @slave: slave struct to work on 2380 * 2381 * It is assumed that frames that were sent on this NIC don't returned as new 2382 * received frames (loopback). Since only the payload is given to this 2383 * function, it check for loopback. 2384 */ 2385 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave) 2386 { 2387 struct bonding *bond = slave->bond; 2388 int ret = RX_HANDLER_ANOTHER; 2389 struct bond_marker *marker; 2390 struct port *port; 2391 atomic64_t *stat; 2392 2393 port = &(SLAVE_AD_INFO(slave)->port); 2394 if (!port->slave) { 2395 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2396 slave->dev->name, slave->bond->dev->name); 2397 return ret; 2398 } 2399 2400 switch (lacpdu->subtype) { 2401 case AD_TYPE_LACPDU: 2402 ret = RX_HANDLER_CONSUMED; 2403 slave_dbg(slave->bond->dev, slave->dev, 2404 "Received LACPDU on port %d\n", 2405 port->actor_port_number); 2406 /* Protect against concurrent state machines */ 2407 spin_lock(&slave->bond->mode_lock); 2408 ad_rx_machine(lacpdu, port); 2409 spin_unlock(&slave->bond->mode_lock); 2410 break; 2411 case AD_TYPE_MARKER: 2412 ret = RX_HANDLER_CONSUMED; 2413 /* No need to convert fields to Little Endian since we 2414 * don't use the marker's fields. 2415 */ 2416 marker = (struct bond_marker *)lacpdu; 2417 switch (marker->tlv_type) { 2418 case AD_MARKER_INFORMATION_SUBTYPE: 2419 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n", 2420 port->actor_port_number); 2421 ad_marker_info_received(marker, port); 2422 break; 2423 case AD_MARKER_RESPONSE_SUBTYPE: 2424 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n", 2425 port->actor_port_number); 2426 ad_marker_response_received(marker, port); 2427 break; 2428 default: 2429 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n", 2430 port->actor_port_number); 2431 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx; 2432 atomic64_inc(stat); 2433 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx; 2434 atomic64_inc(stat); 2435 } 2436 break; 2437 default: 2438 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx); 2439 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx); 2440 } 2441 2442 return ret; 2443 } 2444 2445 /** 2446 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2447 * its current speed and duplex settings. 2448 * 2449 * @port: the port we'are looking at 2450 * @reset: Boolean to just reset the speed and the duplex part of the key 2451 * 2452 * The logic to change the oper / admin keys is: 2453 * (a) A full duplex port can participate in LACP with partner. 2454 * (b) When the speed is changed, LACP need to be reinitiated. 2455 */ 2456 static void ad_update_actor_keys(struct port *port, bool reset) 2457 { 2458 u8 duplex = 0; 2459 u16 ospeed = 0, speed = 0; 2460 u16 old_oper_key = port->actor_oper_port_key; 2461 2462 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2463 if (!reset) { 2464 speed = __get_link_speed(port); 2465 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2466 duplex = __get_duplex(port); 2467 port->actor_admin_port_key |= (speed << 1) | duplex; 2468 } 2469 port->actor_oper_port_key = port->actor_admin_port_key; 2470 2471 if (old_oper_key != port->actor_oper_port_key) { 2472 /* Only 'duplex' port participates in LACP */ 2473 if (duplex) 2474 port->sm_vars |= AD_PORT_LACP_ENABLED; 2475 else 2476 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2477 2478 if (!reset) { 2479 if (!speed) { 2480 slave_err(port->slave->bond->dev, 2481 port->slave->dev, 2482 "speed changed to 0 on port %d\n", 2483 port->actor_port_number); 2484 } else if (duplex && ospeed != speed) { 2485 /* Speed change restarts LACP state-machine */ 2486 port->sm_vars |= AD_PORT_BEGIN; 2487 } 2488 } 2489 } 2490 } 2491 2492 /** 2493 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2494 * change indication 2495 * 2496 * @slave: slave struct to work on 2497 * 2498 * Handle reselection of aggregator (if needed) for this port. 2499 */ 2500 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2501 { 2502 struct port *port; 2503 2504 port = &(SLAVE_AD_INFO(slave)->port); 2505 2506 /* if slave is null, the whole port is not initialized */ 2507 if (!port->slave) { 2508 slave_warn(slave->bond->dev, slave->dev, 2509 "speed/duplex changed for uninitialized port\n"); 2510 return; 2511 } 2512 2513 spin_lock_bh(&slave->bond->mode_lock); 2514 ad_update_actor_keys(port, false); 2515 spin_unlock_bh(&slave->bond->mode_lock); 2516 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n", 2517 port->actor_port_number); 2518 } 2519 2520 /** 2521 * bond_3ad_handle_link_change - handle a slave's link status change indication 2522 * @slave: slave struct to work on 2523 * @link: whether the link is now up or down 2524 * 2525 * Handle reselection of aggregator (if needed) for this port. 2526 */ 2527 void bond_3ad_handle_link_change(struct slave *slave, char link) 2528 { 2529 struct aggregator *agg; 2530 struct port *port; 2531 bool dummy; 2532 2533 port = &(SLAVE_AD_INFO(slave)->port); 2534 2535 /* if slave is null, the whole port is not initialized */ 2536 if (!port->slave) { 2537 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n"); 2538 return; 2539 } 2540 2541 spin_lock_bh(&slave->bond->mode_lock); 2542 /* on link down we are zeroing duplex and speed since 2543 * some of the adaptors(ce1000.lan) report full duplex/speed 2544 * instead of N/A(duplex) / 0(speed). 2545 * 2546 * on link up we are forcing recheck on the duplex and speed since 2547 * some of he adaptors(ce1000.lan) report. 2548 */ 2549 if (link == BOND_LINK_UP) { 2550 port->is_enabled = true; 2551 ad_update_actor_keys(port, false); 2552 } else { 2553 /* link has failed */ 2554 port->is_enabled = false; 2555 ad_update_actor_keys(port, true); 2556 } 2557 agg = __get_first_agg(port); 2558 ad_agg_selection_logic(agg, &dummy); 2559 2560 spin_unlock_bh(&slave->bond->mode_lock); 2561 2562 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n", 2563 port->actor_port_number, 2564 link == BOND_LINK_UP ? "UP" : "DOWN"); 2565 2566 /* RTNL is held and mode_lock is released so it's safe 2567 * to update slave_array here. 2568 */ 2569 bond_update_slave_arr(slave->bond, NULL); 2570 } 2571 2572 /** 2573 * bond_3ad_set_carrier - set link state for bonding master 2574 * @bond: bonding structure 2575 * 2576 * if we have an active aggregator, we're up, if not, we're down. 2577 * Presumes that we cannot have an active aggregator if there are 2578 * no slaves with link up. 2579 * 2580 * This behavior complies with IEEE 802.3 section 43.3.9. 2581 * 2582 * Called by bond_set_carrier(). Return zero if carrier state does not 2583 * change, nonzero if it does. 2584 */ 2585 int bond_3ad_set_carrier(struct bonding *bond) 2586 { 2587 struct aggregator *active; 2588 struct slave *first_slave; 2589 int ret = 1; 2590 2591 rcu_read_lock(); 2592 first_slave = bond_first_slave_rcu(bond); 2593 if (!first_slave) { 2594 ret = 0; 2595 goto out; 2596 } 2597 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2598 if (active) { 2599 /* are enough slaves available to consider link up? */ 2600 if (__agg_active_ports(active) < bond->params.min_links) { 2601 if (netif_carrier_ok(bond->dev)) { 2602 netif_carrier_off(bond->dev); 2603 goto out; 2604 } 2605 } else if (!netif_carrier_ok(bond->dev)) { 2606 netif_carrier_on(bond->dev); 2607 goto out; 2608 } 2609 } else if (netif_carrier_ok(bond->dev)) { 2610 netif_carrier_off(bond->dev); 2611 } 2612 out: 2613 rcu_read_unlock(); 2614 return ret; 2615 } 2616 2617 /** 2618 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2619 * @bond: bonding struct to work on 2620 * @ad_info: ad_info struct to fill with the bond's info 2621 * 2622 * Returns: 0 on success 2623 * < 0 on error 2624 */ 2625 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2626 struct ad_info *ad_info) 2627 { 2628 struct aggregator *aggregator = NULL; 2629 struct list_head *iter; 2630 struct slave *slave; 2631 struct port *port; 2632 2633 bond_for_each_slave_rcu(bond, slave, iter) { 2634 port = &(SLAVE_AD_INFO(slave)->port); 2635 if (port->aggregator && port->aggregator->is_active) { 2636 aggregator = port->aggregator; 2637 break; 2638 } 2639 } 2640 2641 if (!aggregator) 2642 return -1; 2643 2644 ad_info->aggregator_id = aggregator->aggregator_identifier; 2645 ad_info->ports = __agg_active_ports(aggregator); 2646 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2647 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2648 ether_addr_copy(ad_info->partner_system, 2649 aggregator->partner_system.mac_addr_value); 2650 return 0; 2651 } 2652 2653 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2654 { 2655 int ret; 2656 2657 rcu_read_lock(); 2658 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2659 rcu_read_unlock(); 2660 2661 return ret; 2662 } 2663 2664 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2665 struct slave *slave) 2666 { 2667 struct lacpdu *lacpdu, _lacpdu; 2668 2669 if (skb->protocol != PKT_TYPE_LACPDU) 2670 return RX_HANDLER_ANOTHER; 2671 2672 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2673 return RX_HANDLER_ANOTHER; 2674 2675 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2676 if (!lacpdu) { 2677 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx); 2678 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx); 2679 return RX_HANDLER_ANOTHER; 2680 } 2681 2682 return bond_3ad_rx_indication(lacpdu, slave); 2683 } 2684 2685 /** 2686 * bond_3ad_update_lacp_rate - change the lacp rate 2687 * @bond: bonding struct 2688 * 2689 * When modify lacp_rate parameter via sysfs, 2690 * update actor_oper_port_state of each port. 2691 * 2692 * Hold bond->mode_lock, 2693 * so we can modify port->actor_oper_port_state, 2694 * no matter bond is up or down. 2695 */ 2696 void bond_3ad_update_lacp_rate(struct bonding *bond) 2697 { 2698 struct port *port = NULL; 2699 struct list_head *iter; 2700 struct slave *slave; 2701 int lacp_fast; 2702 2703 lacp_fast = bond->params.lacp_fast; 2704 spin_lock_bh(&bond->mode_lock); 2705 bond_for_each_slave(bond, slave, iter) { 2706 port = &(SLAVE_AD_INFO(slave)->port); 2707 if (lacp_fast) 2708 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; 2709 else 2710 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT; 2711 } 2712 spin_unlock_bh(&bond->mode_lock); 2713 } 2714 2715 size_t bond_3ad_stats_size(void) 2716 { 2717 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */ 2718 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */ 2719 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */ 2720 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */ 2721 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */ 2722 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */ 2723 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */ 2724 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */ 2725 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */ 2726 } 2727 2728 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats) 2729 { 2730 u64 val; 2731 2732 val = atomic64_read(&stats->lacpdu_rx); 2733 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val, 2734 BOND_3AD_STAT_PAD)) 2735 return -EMSGSIZE; 2736 val = atomic64_read(&stats->lacpdu_tx); 2737 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val, 2738 BOND_3AD_STAT_PAD)) 2739 return -EMSGSIZE; 2740 val = atomic64_read(&stats->lacpdu_unknown_rx); 2741 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val, 2742 BOND_3AD_STAT_PAD)) 2743 return -EMSGSIZE; 2744 val = atomic64_read(&stats->lacpdu_illegal_rx); 2745 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val, 2746 BOND_3AD_STAT_PAD)) 2747 return -EMSGSIZE; 2748 2749 val = atomic64_read(&stats->marker_rx); 2750 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val, 2751 BOND_3AD_STAT_PAD)) 2752 return -EMSGSIZE; 2753 val = atomic64_read(&stats->marker_tx); 2754 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val, 2755 BOND_3AD_STAT_PAD)) 2756 return -EMSGSIZE; 2757 val = atomic64_read(&stats->marker_resp_rx); 2758 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val, 2759 BOND_3AD_STAT_PAD)) 2760 return -EMSGSIZE; 2761 val = atomic64_read(&stats->marker_resp_tx); 2762 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val, 2763 BOND_3AD_STAT_PAD)) 2764 return -EMSGSIZE; 2765 val = atomic64_read(&stats->marker_unknown_rx); 2766 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val, 2767 BOND_3AD_STAT_PAD)) 2768 return -EMSGSIZE; 2769 2770 return 0; 2771 } 2772