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 state definitions (43.4.2.2 in the 802.3ad standard) */ 35 #define AD_STATE_LACP_ACTIVITY 0x1 36 #define AD_STATE_LACP_TIMEOUT 0x2 37 #define AD_STATE_AGGREGATION 0x4 38 #define AD_STATE_SYNCHRONIZATION 0x8 39 #define AD_STATE_COLLECTING 0x10 40 #define AD_STATE_DISTRIBUTING 0x20 41 #define AD_STATE_DEFAULTED 0x40 42 #define AD_STATE_EXPIRED 0x80 43 44 /* Port Variables definitions used by the State Machines (43.4.7 in the 45 * 802.3ad standard) 46 */ 47 #define AD_PORT_BEGIN 0x1 48 #define AD_PORT_LACP_ENABLED 0x2 49 #define AD_PORT_ACTOR_CHURN 0x4 50 #define AD_PORT_PARTNER_CHURN 0x8 51 #define AD_PORT_READY 0x10 52 #define AD_PORT_READY_N 0x20 53 #define AD_PORT_MATCHED 0x40 54 #define AD_PORT_STANDBY 0x80 55 #define AD_PORT_SELECTED 0x100 56 #define AD_PORT_MOVED 0x200 57 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) 58 59 /* Port Key definitions 60 * key is determined according to the link speed, duplex and 61 * user key (which is yet not supported) 62 * -------------------------------------------------------------- 63 * Port key | User key (10 bits) | Speed (5 bits) | Duplex| 64 * -------------------------------------------------------------- 65 * |15 6|5 1|0 66 */ 67 #define AD_DUPLEX_KEY_MASKS 0x1 68 #define AD_SPEED_KEY_MASKS 0x3E 69 #define AD_USER_KEY_MASKS 0xFFC0 70 71 enum ad_link_speed_type { 72 AD_LINK_SPEED_1MBPS = 1, 73 AD_LINK_SPEED_10MBPS, 74 AD_LINK_SPEED_100MBPS, 75 AD_LINK_SPEED_1000MBPS, 76 AD_LINK_SPEED_2500MBPS, 77 AD_LINK_SPEED_5000MBPS, 78 AD_LINK_SPEED_10000MBPS, 79 AD_LINK_SPEED_14000MBPS, 80 AD_LINK_SPEED_20000MBPS, 81 AD_LINK_SPEED_25000MBPS, 82 AD_LINK_SPEED_40000MBPS, 83 AD_LINK_SPEED_50000MBPS, 84 AD_LINK_SPEED_56000MBPS, 85 AD_LINK_SPEED_100000MBPS, 86 }; 87 88 /* compare MAC addresses */ 89 #define MAC_ADDRESS_EQUAL(A, B) \ 90 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) 91 92 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { 93 0, 0, 0, 0, 0, 0 94 }; 95 static u16 ad_ticks_per_sec; 96 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; 97 98 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = 99 MULTICAST_LACPDU_ADDR; 100 101 /* ================= main 802.3ad protocol functions ================== */ 102 static int ad_lacpdu_send(struct port *port); 103 static int ad_marker_send(struct port *port, struct bond_marker *marker); 104 static void ad_mux_machine(struct port *port, bool *update_slave_arr); 105 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); 106 static void ad_tx_machine(struct port *port); 107 static void ad_periodic_machine(struct port *port); 108 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); 109 static void ad_agg_selection_logic(struct aggregator *aggregator, 110 bool *update_slave_arr); 111 static void ad_clear_agg(struct aggregator *aggregator); 112 static void ad_initialize_agg(struct aggregator *aggregator); 113 static void ad_initialize_port(struct port *port, int lacp_fast); 114 static void ad_enable_collecting_distributing(struct port *port, 115 bool *update_slave_arr); 116 static void ad_disable_collecting_distributing(struct port *port, 117 bool *update_slave_arr); 118 static void ad_marker_info_received(struct bond_marker *marker_info, 119 struct port *port); 120 static void ad_marker_response_received(struct bond_marker *marker, 121 struct port *port); 122 static void ad_update_actor_keys(struct port *port, bool reset); 123 124 125 /* ================= api to bonding and kernel code ================== */ 126 127 /** 128 * __get_bond_by_port - get the port's bonding struct 129 * @port: the port we're looking at 130 * 131 * Return @port's bonding struct, or %NULL if it can't be found. 132 */ 133 static inline struct bonding *__get_bond_by_port(struct port *port) 134 { 135 if (port->slave == NULL) 136 return NULL; 137 138 return bond_get_bond_by_slave(port->slave); 139 } 140 141 /** 142 * __get_first_agg - get the first aggregator in the bond 143 * @bond: the bond we're looking at 144 * 145 * Return the aggregator of the first slave in @bond, or %NULL if it can't be 146 * found. 147 * The caller must hold RCU or RTNL lock. 148 */ 149 static inline struct aggregator *__get_first_agg(struct port *port) 150 { 151 struct bonding *bond = __get_bond_by_port(port); 152 struct slave *first_slave; 153 struct aggregator *agg; 154 155 /* If there's no bond for this port, or bond has no slaves */ 156 if (bond == NULL) 157 return NULL; 158 159 rcu_read_lock(); 160 first_slave = bond_first_slave_rcu(bond); 161 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; 162 rcu_read_unlock(); 163 164 return agg; 165 } 166 167 /** 168 * __agg_has_partner - see if we have a partner 169 * @agg: the agregator we're looking at 170 * 171 * Return nonzero if aggregator has a partner (denoted by a non-zero ether 172 * address for the partner). Return 0 if not. 173 */ 174 static inline int __agg_has_partner(struct aggregator *agg) 175 { 176 return !is_zero_ether_addr(agg->partner_system.mac_addr_value); 177 } 178 179 /** 180 * __disable_port - disable the port's slave 181 * @port: the port we're looking at 182 */ 183 static inline void __disable_port(struct port *port) 184 { 185 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); 186 } 187 188 /** 189 * __enable_port - enable the port's slave, if it's up 190 * @port: the port we're looking at 191 */ 192 static inline void __enable_port(struct port *port) 193 { 194 struct slave *slave = port->slave; 195 196 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) 197 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); 198 } 199 200 /** 201 * __port_is_enabled - check if the port's slave is in active state 202 * @port: the port we're looking at 203 */ 204 static inline int __port_is_enabled(struct port *port) 205 { 206 return bond_is_active_slave(port->slave); 207 } 208 209 /** 210 * __get_agg_selection_mode - get the aggregator selection mode 211 * @port: the port we're looking at 212 * 213 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. 214 */ 215 static inline u32 __get_agg_selection_mode(struct port *port) 216 { 217 struct bonding *bond = __get_bond_by_port(port); 218 219 if (bond == NULL) 220 return BOND_AD_STABLE; 221 222 return bond->params.ad_select; 223 } 224 225 /** 226 * __check_agg_selection_timer - check if the selection timer has expired 227 * @port: the port we're looking at 228 */ 229 static inline int __check_agg_selection_timer(struct port *port) 230 { 231 struct bonding *bond = __get_bond_by_port(port); 232 233 if (bond == NULL) 234 return 0; 235 236 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; 237 } 238 239 /** 240 * __get_link_speed - get a port's speed 241 * @port: the port we're looking at 242 * 243 * Return @port's speed in 802.3ad enum format. i.e. one of: 244 * 0, 245 * %AD_LINK_SPEED_10MBPS, 246 * %AD_LINK_SPEED_100MBPS, 247 * %AD_LINK_SPEED_1000MBPS, 248 * %AD_LINK_SPEED_2500MBPS, 249 * %AD_LINK_SPEED_5000MBPS, 250 * %AD_LINK_SPEED_10000MBPS 251 * %AD_LINK_SPEED_14000MBPS, 252 * %AD_LINK_SPEED_20000MBPS 253 * %AD_LINK_SPEED_25000MBPS 254 * %AD_LINK_SPEED_40000MBPS 255 * %AD_LINK_SPEED_50000MBPS 256 * %AD_LINK_SPEED_56000MBPS 257 * %AD_LINK_SPEED_100000MBPS 258 */ 259 static u16 __get_link_speed(struct port *port) 260 { 261 struct slave *slave = port->slave; 262 u16 speed; 263 264 /* this if covers only a special case: when the configuration starts 265 * with link down, it sets the speed to 0. 266 * This is done in spite of the fact that the e100 driver reports 0 267 * to be compatible with MVT in the future. 268 */ 269 if (slave->link != BOND_LINK_UP) 270 speed = 0; 271 else { 272 switch (slave->speed) { 273 case SPEED_10: 274 speed = AD_LINK_SPEED_10MBPS; 275 break; 276 277 case SPEED_100: 278 speed = AD_LINK_SPEED_100MBPS; 279 break; 280 281 case SPEED_1000: 282 speed = AD_LINK_SPEED_1000MBPS; 283 break; 284 285 case SPEED_2500: 286 speed = AD_LINK_SPEED_2500MBPS; 287 break; 288 289 case SPEED_5000: 290 speed = AD_LINK_SPEED_5000MBPS; 291 break; 292 293 case SPEED_10000: 294 speed = AD_LINK_SPEED_10000MBPS; 295 break; 296 297 case SPEED_14000: 298 speed = AD_LINK_SPEED_14000MBPS; 299 break; 300 301 case SPEED_20000: 302 speed = AD_LINK_SPEED_20000MBPS; 303 break; 304 305 case SPEED_25000: 306 speed = AD_LINK_SPEED_25000MBPS; 307 break; 308 309 case SPEED_40000: 310 speed = AD_LINK_SPEED_40000MBPS; 311 break; 312 313 case SPEED_50000: 314 speed = AD_LINK_SPEED_50000MBPS; 315 break; 316 317 case SPEED_56000: 318 speed = AD_LINK_SPEED_56000MBPS; 319 break; 320 321 case SPEED_100000: 322 speed = AD_LINK_SPEED_100000MBPS; 323 break; 324 325 default: 326 /* unknown speed value from ethtool. shouldn't happen */ 327 if (slave->speed != SPEED_UNKNOWN) 328 pr_warn_once("%s: unknown ethtool speed (%d) for port %d (set it to 0)\n", 329 slave->bond->dev->name, 330 slave->speed, 331 port->actor_port_number); 332 speed = 0; 333 break; 334 } 335 } 336 337 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", 338 port->actor_port_number, speed); 339 return speed; 340 } 341 342 /** 343 * __get_duplex - get a port's duplex 344 * @port: the port we're looking at 345 * 346 * Return @port's duplex in 802.3ad bitmask format. i.e.: 347 * 0x01 if in full duplex 348 * 0x00 otherwise 349 */ 350 static u8 __get_duplex(struct port *port) 351 { 352 struct slave *slave = port->slave; 353 u8 retval = 0x0; 354 355 /* handling a special case: when the configuration starts with 356 * link down, it sets the duplex to 0. 357 */ 358 if (slave->link == BOND_LINK_UP) { 359 switch (slave->duplex) { 360 case DUPLEX_FULL: 361 retval = 0x1; 362 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", 363 port->actor_port_number); 364 break; 365 case DUPLEX_HALF: 366 default: 367 retval = 0x0; 368 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", 369 port->actor_port_number); 370 break; 371 } 372 } 373 return retval; 374 } 375 376 static void __ad_actor_update_port(struct port *port) 377 { 378 const struct bonding *bond = bond_get_bond_by_slave(port->slave); 379 380 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; 381 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; 382 } 383 384 /* Conversions */ 385 386 /** 387 * __ad_timer_to_ticks - convert a given timer type to AD module ticks 388 * @timer_type: which timer to operate 389 * @par: timer parameter. see below 390 * 391 * If @timer_type is %current_while_timer, @par indicates long/short timer. 392 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, 393 * %SLOW_PERIODIC_TIME. 394 */ 395 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) 396 { 397 u16 retval = 0; /* to silence the compiler */ 398 399 switch (timer_type) { 400 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ 401 if (par) 402 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); 403 else 404 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); 405 break; 406 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ 407 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 408 break; 409 case AD_PERIODIC_TIMER: /* for periodic machine */ 410 retval = (par*ad_ticks_per_sec); /* long timeout */ 411 break; 412 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ 413 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); 414 break; 415 case AD_WAIT_WHILE_TIMER: /* for selection machine */ 416 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); 417 break; 418 } 419 420 return retval; 421 } 422 423 424 /* ================= ad_rx_machine helper functions ================== */ 425 426 /** 427 * __choose_matched - update a port's matched variable from a received lacpdu 428 * @lacpdu: the lacpdu we've received 429 * @port: the port we're looking at 430 * 431 * Update the value of the matched variable, using parameter values from a 432 * newly received lacpdu. Parameter values for the partner carried in the 433 * received PDU are compared with the corresponding operational parameter 434 * values for the actor. Matched is set to TRUE if all of these parameters 435 * match and the PDU parameter partner_state.aggregation has the same value as 436 * actor_oper_port_state.aggregation and lacp will actively maintain the link 437 * in the aggregation. Matched is also set to TRUE if the value of 438 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates 439 * an individual link and lacp will actively maintain the link. Otherwise, 440 * matched is set to FALSE. LACP is considered to be actively maintaining the 441 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both 442 * the actor's actor_oper_port_state.lacp_activity and the PDU's 443 * partner_state.lacp_activity variables are TRUE. 444 * 445 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is 446 * used here to implement the language from 802.3ad 43.4.9 that requires 447 * recordPDU to "match" the LACPDU parameters to the stored values. 448 */ 449 static void __choose_matched(struct lacpdu *lacpdu, struct port *port) 450 { 451 /* check if all parameters are alike 452 * or this is individual link(aggregation == FALSE) 453 * then update the state machine Matched variable. 454 */ 455 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && 456 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && 457 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && 458 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && 459 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && 460 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || 461 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) 462 ) { 463 port->sm_vars |= AD_PORT_MATCHED; 464 } else { 465 port->sm_vars &= ~AD_PORT_MATCHED; 466 } 467 } 468 469 /** 470 * __record_pdu - record parameters from a received lacpdu 471 * @lacpdu: the lacpdu we've received 472 * @port: the port we're looking at 473 * 474 * Record the parameter values for the Actor carried in a received lacpdu as 475 * the current partner operational parameter values and sets 476 * actor_oper_port_state.defaulted to FALSE. 477 */ 478 static void __record_pdu(struct lacpdu *lacpdu, struct port *port) 479 { 480 if (lacpdu && port) { 481 struct port_params *partner = &port->partner_oper; 482 483 __choose_matched(lacpdu, port); 484 /* record the new parameter values for the partner 485 * operational 486 */ 487 partner->port_number = ntohs(lacpdu->actor_port); 488 partner->port_priority = ntohs(lacpdu->actor_port_priority); 489 partner->system = lacpdu->actor_system; 490 partner->system_priority = ntohs(lacpdu->actor_system_priority); 491 partner->key = ntohs(lacpdu->actor_key); 492 partner->port_state = lacpdu->actor_state; 493 494 /* set actor_oper_port_state.defaulted to FALSE */ 495 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; 496 497 /* set the partner sync. to on if the partner is sync, 498 * and the port is matched 499 */ 500 if ((port->sm_vars & AD_PORT_MATCHED) && 501 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { 502 partner->port_state |= AD_STATE_SYNCHRONIZATION; 503 pr_debug("%s partner sync=1\n", port->slave->dev->name); 504 } else { 505 partner->port_state &= ~AD_STATE_SYNCHRONIZATION; 506 pr_debug("%s partner sync=0\n", port->slave->dev->name); 507 } 508 } 509 } 510 511 /** 512 * __record_default - record default parameters 513 * @port: the port we're looking at 514 * 515 * This function records the default parameter values for the partner carried 516 * in the Partner Admin parameters as the current partner operational parameter 517 * values and sets actor_oper_port_state.defaulted to TRUE. 518 */ 519 static void __record_default(struct port *port) 520 { 521 if (port) { 522 /* record the partner admin parameters */ 523 memcpy(&port->partner_oper, &port->partner_admin, 524 sizeof(struct port_params)); 525 526 /* set actor_oper_port_state.defaulted to true */ 527 port->actor_oper_port_state |= AD_STATE_DEFAULTED; 528 } 529 } 530 531 /** 532 * __update_selected - update a port's Selected variable from a received lacpdu 533 * @lacpdu: the lacpdu we've received 534 * @port: the port we're looking at 535 * 536 * Update the value of the selected variable, using parameter values from a 537 * newly received lacpdu. The parameter values for the Actor carried in the 538 * received PDU are compared with the corresponding operational parameter 539 * values for the ports partner. If one or more of the comparisons shows that 540 * the value(s) received in the PDU differ from the current operational values, 541 * then selected is set to FALSE and actor_oper_port_state.synchronization is 542 * set to out_of_sync. Otherwise, selected remains unchanged. 543 */ 544 static void __update_selected(struct lacpdu *lacpdu, struct port *port) 545 { 546 if (lacpdu && port) { 547 const struct port_params *partner = &port->partner_oper; 548 549 /* check if any parameter is different then 550 * update the state machine selected variable. 551 */ 552 if (ntohs(lacpdu->actor_port) != partner->port_number || 553 ntohs(lacpdu->actor_port_priority) != partner->port_priority || 554 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || 555 ntohs(lacpdu->actor_system_priority) != partner->system_priority || 556 ntohs(lacpdu->actor_key) != partner->key || 557 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { 558 port->sm_vars &= ~AD_PORT_SELECTED; 559 } 560 } 561 } 562 563 /** 564 * __update_default_selected - update a port's Selected variable from Partner 565 * @port: the port we're looking at 566 * 567 * This function updates the value of the selected variable, using the partner 568 * administrative parameter values. The administrative values are compared with 569 * the corresponding operational parameter values for the partner. If one or 570 * more of the comparisons shows that the administrative value(s) differ from 571 * the current operational values, then Selected is set to FALSE and 572 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, 573 * Selected remains unchanged. 574 */ 575 static void __update_default_selected(struct port *port) 576 { 577 if (port) { 578 const struct port_params *admin = &port->partner_admin; 579 const struct port_params *oper = &port->partner_oper; 580 581 /* check if any parameter is different then 582 * update the state machine selected variable. 583 */ 584 if (admin->port_number != oper->port_number || 585 admin->port_priority != oper->port_priority || 586 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || 587 admin->system_priority != oper->system_priority || 588 admin->key != oper->key || 589 (admin->port_state & AD_STATE_AGGREGATION) 590 != (oper->port_state & AD_STATE_AGGREGATION)) { 591 port->sm_vars &= ~AD_PORT_SELECTED; 592 } 593 } 594 } 595 596 /** 597 * __update_ntt - update a port's ntt variable from a received lacpdu 598 * @lacpdu: the lacpdu we've received 599 * @port: the port we're looking at 600 * 601 * Updates the value of the ntt variable, using parameter values from a newly 602 * received lacpdu. The parameter values for the partner carried in the 603 * received PDU are compared with the corresponding operational parameter 604 * values for the Actor. If one or more of the comparisons shows that the 605 * value(s) received in the PDU differ from the current operational values, 606 * then ntt is set to TRUE. Otherwise, ntt remains unchanged. 607 */ 608 static void __update_ntt(struct lacpdu *lacpdu, struct port *port) 609 { 610 /* validate lacpdu and port */ 611 if (lacpdu && port) { 612 /* check if any parameter is different then 613 * update the port->ntt. 614 */ 615 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || 616 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || 617 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || 618 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || 619 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || 620 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || 621 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || 622 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || 623 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) 624 ) { 625 port->ntt = true; 626 } 627 } 628 } 629 630 /** 631 * __agg_ports_are_ready - check if all ports in an aggregator are ready 632 * @aggregator: the aggregator we're looking at 633 * 634 */ 635 static int __agg_ports_are_ready(struct aggregator *aggregator) 636 { 637 struct port *port; 638 int retval = 1; 639 640 if (aggregator) { 641 /* scan all ports in this aggregator to verfy if they are 642 * all ready. 643 */ 644 for (port = aggregator->lag_ports; 645 port; 646 port = port->next_port_in_aggregator) { 647 if (!(port->sm_vars & AD_PORT_READY_N)) { 648 retval = 0; 649 break; 650 } 651 } 652 } 653 654 return retval; 655 } 656 657 /** 658 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator 659 * @aggregator: the aggregator we're looking at 660 * @val: Should the ports' ready bit be set on or off 661 * 662 */ 663 static void __set_agg_ports_ready(struct aggregator *aggregator, int val) 664 { 665 struct port *port; 666 667 for (port = aggregator->lag_ports; port; 668 port = port->next_port_in_aggregator) { 669 if (val) 670 port->sm_vars |= AD_PORT_READY; 671 else 672 port->sm_vars &= ~AD_PORT_READY; 673 } 674 } 675 676 static int __agg_active_ports(struct aggregator *agg) 677 { 678 struct port *port; 679 int active = 0; 680 681 for (port = agg->lag_ports; port; 682 port = port->next_port_in_aggregator) { 683 if (port->is_enabled) 684 active++; 685 } 686 687 return active; 688 } 689 690 /** 691 * __get_agg_bandwidth - get the total bandwidth of an aggregator 692 * @aggregator: the aggregator we're looking at 693 * 694 */ 695 static u32 __get_agg_bandwidth(struct aggregator *aggregator) 696 { 697 int nports = __agg_active_ports(aggregator); 698 u32 bandwidth = 0; 699 700 if (nports) { 701 switch (__get_link_speed(aggregator->lag_ports)) { 702 case AD_LINK_SPEED_1MBPS: 703 bandwidth = nports; 704 break; 705 case AD_LINK_SPEED_10MBPS: 706 bandwidth = nports * 10; 707 break; 708 case AD_LINK_SPEED_100MBPS: 709 bandwidth = nports * 100; 710 break; 711 case AD_LINK_SPEED_1000MBPS: 712 bandwidth = nports * 1000; 713 break; 714 case AD_LINK_SPEED_2500MBPS: 715 bandwidth = nports * 2500; 716 break; 717 case AD_LINK_SPEED_5000MBPS: 718 bandwidth = nports * 5000; 719 break; 720 case AD_LINK_SPEED_10000MBPS: 721 bandwidth = nports * 10000; 722 break; 723 case AD_LINK_SPEED_14000MBPS: 724 bandwidth = nports * 14000; 725 break; 726 case AD_LINK_SPEED_20000MBPS: 727 bandwidth = nports * 20000; 728 break; 729 case AD_LINK_SPEED_25000MBPS: 730 bandwidth = nports * 25000; 731 break; 732 case AD_LINK_SPEED_40000MBPS: 733 bandwidth = nports * 40000; 734 break; 735 case AD_LINK_SPEED_50000MBPS: 736 bandwidth = nports * 50000; 737 break; 738 case AD_LINK_SPEED_56000MBPS: 739 bandwidth = nports * 56000; 740 break; 741 case AD_LINK_SPEED_100000MBPS: 742 bandwidth = nports * 100000; 743 break; 744 default: 745 bandwidth = 0; /* to silence the compiler */ 746 } 747 } 748 return bandwidth; 749 } 750 751 /** 752 * __get_active_agg - get the current active aggregator 753 * @aggregator: the aggregator we're looking at 754 * 755 * Caller must hold RCU lock. 756 */ 757 static struct aggregator *__get_active_agg(struct aggregator *aggregator) 758 { 759 struct bonding *bond = aggregator->slave->bond; 760 struct list_head *iter; 761 struct slave *slave; 762 763 bond_for_each_slave_rcu(bond, slave, iter) 764 if (SLAVE_AD_INFO(slave)->aggregator.is_active) 765 return &(SLAVE_AD_INFO(slave)->aggregator); 766 767 return NULL; 768 } 769 770 /** 771 * __update_lacpdu_from_port - update a port's lacpdu fields 772 * @port: the port we're looking at 773 */ 774 static inline void __update_lacpdu_from_port(struct port *port) 775 { 776 struct lacpdu *lacpdu = &port->lacpdu; 777 const struct port_params *partner = &port->partner_oper; 778 779 /* update current actual Actor parameters 780 * lacpdu->subtype initialized 781 * lacpdu->version_number initialized 782 * lacpdu->tlv_type_actor_info initialized 783 * lacpdu->actor_information_length initialized 784 */ 785 786 lacpdu->actor_system_priority = htons(port->actor_system_priority); 787 lacpdu->actor_system = port->actor_system; 788 lacpdu->actor_key = htons(port->actor_oper_port_key); 789 lacpdu->actor_port_priority = htons(port->actor_port_priority); 790 lacpdu->actor_port = htons(port->actor_port_number); 791 lacpdu->actor_state = port->actor_oper_port_state; 792 pr_debug("update lacpdu: %s, actor port state %x\n", 793 port->slave->dev->name, port->actor_oper_port_state); 794 795 /* lacpdu->reserved_3_1 initialized 796 * lacpdu->tlv_type_partner_info initialized 797 * lacpdu->partner_information_length initialized 798 */ 799 800 lacpdu->partner_system_priority = htons(partner->system_priority); 801 lacpdu->partner_system = partner->system; 802 lacpdu->partner_key = htons(partner->key); 803 lacpdu->partner_port_priority = htons(partner->port_priority); 804 lacpdu->partner_port = htons(partner->port_number); 805 lacpdu->partner_state = partner->port_state; 806 807 /* lacpdu->reserved_3_2 initialized 808 * lacpdu->tlv_type_collector_info initialized 809 * lacpdu->collector_information_length initialized 810 * collector_max_delay initialized 811 * reserved_12[12] initialized 812 * tlv_type_terminator initialized 813 * terminator_length initialized 814 * reserved_50[50] initialized 815 */ 816 } 817 818 /* ================= main 802.3ad protocol code ========================= */ 819 820 /** 821 * ad_lacpdu_send - send out a lacpdu packet on a given port 822 * @port: the port we're looking at 823 * 824 * Returns: 0 on success 825 * < 0 on error 826 */ 827 static int ad_lacpdu_send(struct port *port) 828 { 829 struct slave *slave = port->slave; 830 struct sk_buff *skb; 831 struct lacpdu_header *lacpdu_header; 832 int length = sizeof(struct lacpdu_header); 833 834 skb = dev_alloc_skb(length); 835 if (!skb) 836 return -ENOMEM; 837 838 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx); 839 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx); 840 841 skb->dev = slave->dev; 842 skb_reset_mac_header(skb); 843 skb->network_header = skb->mac_header + ETH_HLEN; 844 skb->protocol = PKT_TYPE_LACPDU; 845 skb->priority = TC_PRIO_CONTROL; 846 847 lacpdu_header = skb_put(skb, length); 848 849 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); 850 /* Note: source address is set to be the member's PERMANENT address, 851 * because we use it to identify loopback lacpdus in receive. 852 */ 853 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); 854 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; 855 856 lacpdu_header->lacpdu = port->lacpdu; 857 858 dev_queue_xmit(skb); 859 860 return 0; 861 } 862 863 /** 864 * ad_marker_send - send marker information/response on a given port 865 * @port: the port we're looking at 866 * @marker: marker data to send 867 * 868 * Returns: 0 on success 869 * < 0 on error 870 */ 871 static int ad_marker_send(struct port *port, struct bond_marker *marker) 872 { 873 struct slave *slave = port->slave; 874 struct sk_buff *skb; 875 struct bond_marker_header *marker_header; 876 int length = sizeof(struct bond_marker_header); 877 878 skb = dev_alloc_skb(length + 16); 879 if (!skb) 880 return -ENOMEM; 881 882 switch (marker->tlv_type) { 883 case AD_MARKER_INFORMATION_SUBTYPE: 884 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx); 885 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx); 886 break; 887 case AD_MARKER_RESPONSE_SUBTYPE: 888 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx); 889 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx); 890 break; 891 } 892 893 skb_reserve(skb, 16); 894 895 skb->dev = slave->dev; 896 skb_reset_mac_header(skb); 897 skb->network_header = skb->mac_header + ETH_HLEN; 898 skb->protocol = PKT_TYPE_LACPDU; 899 900 marker_header = skb_put(skb, length); 901 902 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); 903 /* Note: source address is set to be the member's PERMANENT address, 904 * because we use it to identify loopback MARKERs in receive. 905 */ 906 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); 907 marker_header->hdr.h_proto = PKT_TYPE_LACPDU; 908 909 marker_header->marker = *marker; 910 911 dev_queue_xmit(skb); 912 913 return 0; 914 } 915 916 /** 917 * ad_mux_machine - handle a port's mux state machine 918 * @port: the port we're looking at 919 * @update_slave_arr: Does slave array need update? 920 */ 921 static void ad_mux_machine(struct port *port, bool *update_slave_arr) 922 { 923 mux_states_t last_state; 924 925 /* keep current State Machine state to compare later if it was 926 * changed 927 */ 928 last_state = port->sm_mux_state; 929 930 if (port->sm_vars & AD_PORT_BEGIN) { 931 port->sm_mux_state = AD_MUX_DETACHED; 932 } else { 933 switch (port->sm_mux_state) { 934 case AD_MUX_DETACHED: 935 if ((port->sm_vars & AD_PORT_SELECTED) 936 || (port->sm_vars & AD_PORT_STANDBY)) 937 /* if SELECTED or STANDBY */ 938 port->sm_mux_state = AD_MUX_WAITING; 939 break; 940 case AD_MUX_WAITING: 941 /* if SELECTED == FALSE return to DETACH state */ 942 if (!(port->sm_vars & AD_PORT_SELECTED)) { 943 port->sm_vars &= ~AD_PORT_READY_N; 944 /* in order to withhold the Selection Logic to 945 * check all ports READY_N value every callback 946 * cycle to update ready variable, we check 947 * READY_N and update READY here 948 */ 949 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 950 port->sm_mux_state = AD_MUX_DETACHED; 951 break; 952 } 953 954 /* check if the wait_while_timer expired */ 955 if (port->sm_mux_timer_counter 956 && !(--port->sm_mux_timer_counter)) 957 port->sm_vars |= AD_PORT_READY_N; 958 959 /* in order to withhold the selection logic to check 960 * all ports READY_N value every callback cycle to 961 * update ready variable, we check READY_N and update 962 * READY here 963 */ 964 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 965 966 /* if the wait_while_timer expired, and the port is 967 * in READY state, move to ATTACHED state 968 */ 969 if ((port->sm_vars & AD_PORT_READY) 970 && !port->sm_mux_timer_counter) 971 port->sm_mux_state = AD_MUX_ATTACHED; 972 break; 973 case AD_MUX_ATTACHED: 974 /* check also if agg_select_timer expired (so the 975 * edable port will take place only after this timer) 976 */ 977 if ((port->sm_vars & AD_PORT_SELECTED) && 978 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && 979 !__check_agg_selection_timer(port)) { 980 if (port->aggregator->is_active) 981 port->sm_mux_state = 982 AD_MUX_COLLECTING_DISTRIBUTING; 983 } else if (!(port->sm_vars & AD_PORT_SELECTED) || 984 (port->sm_vars & AD_PORT_STANDBY)) { 985 /* if UNSELECTED or STANDBY */ 986 port->sm_vars &= ~AD_PORT_READY_N; 987 /* in order to withhold the selection logic to 988 * check all ports READY_N value every callback 989 * cycle to update ready variable, we check 990 * READY_N and update READY here 991 */ 992 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); 993 port->sm_mux_state = AD_MUX_DETACHED; 994 } else if (port->aggregator->is_active) { 995 port->actor_oper_port_state |= 996 AD_STATE_SYNCHRONIZATION; 997 } 998 break; 999 case AD_MUX_COLLECTING_DISTRIBUTING: 1000 if (!(port->sm_vars & AD_PORT_SELECTED) || 1001 (port->sm_vars & AD_PORT_STANDBY) || 1002 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || 1003 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { 1004 port->sm_mux_state = AD_MUX_ATTACHED; 1005 } else { 1006 /* if port state hasn't changed make 1007 * sure that a collecting distributing 1008 * port in an active aggregator is enabled 1009 */ 1010 if (port->aggregator && 1011 port->aggregator->is_active && 1012 !__port_is_enabled(port)) { 1013 1014 __enable_port(port); 1015 } 1016 } 1017 break; 1018 default: 1019 break; 1020 } 1021 } 1022 1023 /* check if the state machine was changed */ 1024 if (port->sm_mux_state != last_state) { 1025 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1026 port->actor_port_number, 1027 port->slave->dev->name, 1028 last_state, 1029 port->sm_mux_state); 1030 switch (port->sm_mux_state) { 1031 case AD_MUX_DETACHED: 1032 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1033 ad_disable_collecting_distributing(port, 1034 update_slave_arr); 1035 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1036 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1037 port->ntt = true; 1038 break; 1039 case AD_MUX_WAITING: 1040 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); 1041 break; 1042 case AD_MUX_ATTACHED: 1043 if (port->aggregator->is_active) 1044 port->actor_oper_port_state |= 1045 AD_STATE_SYNCHRONIZATION; 1046 else 1047 port->actor_oper_port_state &= 1048 ~AD_STATE_SYNCHRONIZATION; 1049 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 1050 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 1051 ad_disable_collecting_distributing(port, 1052 update_slave_arr); 1053 port->ntt = true; 1054 break; 1055 case AD_MUX_COLLECTING_DISTRIBUTING: 1056 port->actor_oper_port_state |= AD_STATE_COLLECTING; 1057 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; 1058 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; 1059 ad_enable_collecting_distributing(port, 1060 update_slave_arr); 1061 port->ntt = true; 1062 break; 1063 default: 1064 break; 1065 } 1066 } 1067 } 1068 1069 /** 1070 * ad_rx_machine - handle a port's rx State Machine 1071 * @lacpdu: the lacpdu we've received 1072 * @port: the port we're looking at 1073 * 1074 * If lacpdu arrived, stop previous timer (if exists) and set the next state as 1075 * CURRENT. If timer expired set the state machine in the proper state. 1076 * In other cases, this function checks if we need to switch to other state. 1077 */ 1078 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) 1079 { 1080 rx_states_t last_state; 1081 1082 /* keep current State Machine state to compare later if it was 1083 * changed 1084 */ 1085 last_state = port->sm_rx_state; 1086 1087 if (lacpdu) { 1088 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx); 1089 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx); 1090 } 1091 /* check if state machine should change state */ 1092 1093 /* first, check if port was reinitialized */ 1094 if (port->sm_vars & AD_PORT_BEGIN) { 1095 port->sm_rx_state = AD_RX_INITIALIZE; 1096 port->sm_vars |= AD_PORT_CHURNED; 1097 /* check if port is not enabled */ 1098 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) 1099 port->sm_rx_state = AD_RX_PORT_DISABLED; 1100 /* check if new lacpdu arrived */ 1101 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || 1102 (port->sm_rx_state == AD_RX_DEFAULTED) || 1103 (port->sm_rx_state == AD_RX_CURRENT))) { 1104 if (port->sm_rx_state != AD_RX_CURRENT) 1105 port->sm_vars |= AD_PORT_CHURNED; 1106 port->sm_rx_timer_counter = 0; 1107 port->sm_rx_state = AD_RX_CURRENT; 1108 } else { 1109 /* if timer is on, and if it is expired */ 1110 if (port->sm_rx_timer_counter && 1111 !(--port->sm_rx_timer_counter)) { 1112 switch (port->sm_rx_state) { 1113 case AD_RX_EXPIRED: 1114 port->sm_rx_state = AD_RX_DEFAULTED; 1115 break; 1116 case AD_RX_CURRENT: 1117 port->sm_rx_state = AD_RX_EXPIRED; 1118 break; 1119 default: 1120 break; 1121 } 1122 } else { 1123 /* if no lacpdu arrived and no timer is on */ 1124 switch (port->sm_rx_state) { 1125 case AD_RX_PORT_DISABLED: 1126 if (port->is_enabled && 1127 (port->sm_vars & AD_PORT_LACP_ENABLED)) 1128 port->sm_rx_state = AD_RX_EXPIRED; 1129 else if (port->is_enabled 1130 && ((port->sm_vars 1131 & AD_PORT_LACP_ENABLED) == 0)) 1132 port->sm_rx_state = AD_RX_LACP_DISABLED; 1133 break; 1134 default: 1135 break; 1136 1137 } 1138 } 1139 } 1140 1141 /* check if the State machine was changed or new lacpdu arrived */ 1142 if ((port->sm_rx_state != last_state) || (lacpdu)) { 1143 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", 1144 port->actor_port_number, 1145 port->slave->dev->name, 1146 last_state, 1147 port->sm_rx_state); 1148 switch (port->sm_rx_state) { 1149 case AD_RX_INITIALIZE: 1150 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) 1151 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 1152 else 1153 port->sm_vars |= AD_PORT_LACP_ENABLED; 1154 port->sm_vars &= ~AD_PORT_SELECTED; 1155 __record_default(port); 1156 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1157 port->sm_rx_state = AD_RX_PORT_DISABLED; 1158 1159 /* Fall Through */ 1160 case AD_RX_PORT_DISABLED: 1161 port->sm_vars &= ~AD_PORT_MATCHED; 1162 break; 1163 case AD_RX_LACP_DISABLED: 1164 port->sm_vars &= ~AD_PORT_SELECTED; 1165 __record_default(port); 1166 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; 1167 port->sm_vars |= AD_PORT_MATCHED; 1168 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1169 break; 1170 case AD_RX_EXPIRED: 1171 /* Reset of the Synchronization flag (Standard 43.4.12) 1172 * This reset cause to disable this port in the 1173 * COLLECTING_DISTRIBUTING state of the mux machine in 1174 * case of EXPIRED even if LINK_DOWN didn't arrive for 1175 * the port. 1176 */ 1177 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; 1178 port->sm_vars &= ~AD_PORT_MATCHED; 1179 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; 1180 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; 1181 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); 1182 port->actor_oper_port_state |= AD_STATE_EXPIRED; 1183 port->sm_vars |= AD_PORT_CHURNED; 1184 break; 1185 case AD_RX_DEFAULTED: 1186 __update_default_selected(port); 1187 __record_default(port); 1188 port->sm_vars |= AD_PORT_MATCHED; 1189 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1190 break; 1191 case AD_RX_CURRENT: 1192 /* detect loopback situation */ 1193 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), 1194 &(port->actor_system))) { 1195 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" 1196 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", 1197 port->slave->dev->name); 1198 return; 1199 } 1200 __update_selected(lacpdu, port); 1201 __update_ntt(lacpdu, port); 1202 __record_pdu(lacpdu, port); 1203 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); 1204 port->actor_oper_port_state &= ~AD_STATE_EXPIRED; 1205 break; 1206 default: 1207 break; 1208 } 1209 } 1210 } 1211 1212 /** 1213 * ad_churn_machine - handle port churn's state machine 1214 * @port: the port we're looking at 1215 * 1216 */ 1217 static void ad_churn_machine(struct port *port) 1218 { 1219 if (port->sm_vars & AD_PORT_CHURNED) { 1220 port->sm_vars &= ~AD_PORT_CHURNED; 1221 port->sm_churn_actor_state = AD_CHURN_MONITOR; 1222 port->sm_churn_partner_state = AD_CHURN_MONITOR; 1223 port->sm_churn_actor_timer_counter = 1224 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); 1225 port->sm_churn_partner_timer_counter = 1226 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); 1227 return; 1228 } 1229 if (port->sm_churn_actor_timer_counter && 1230 !(--port->sm_churn_actor_timer_counter) && 1231 port->sm_churn_actor_state == AD_CHURN_MONITOR) { 1232 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { 1233 port->sm_churn_actor_state = AD_NO_CHURN; 1234 } else { 1235 port->churn_actor_count++; 1236 port->sm_churn_actor_state = AD_CHURN; 1237 } 1238 } 1239 if (port->sm_churn_partner_timer_counter && 1240 !(--port->sm_churn_partner_timer_counter) && 1241 port->sm_churn_partner_state == AD_CHURN_MONITOR) { 1242 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { 1243 port->sm_churn_partner_state = AD_NO_CHURN; 1244 } else { 1245 port->churn_partner_count++; 1246 port->sm_churn_partner_state = AD_CHURN; 1247 } 1248 } 1249 } 1250 1251 /** 1252 * ad_tx_machine - handle a port's tx state machine 1253 * @port: the port we're looking at 1254 */ 1255 static void ad_tx_machine(struct port *port) 1256 { 1257 /* check if tx timer expired, to verify that we do not send more than 1258 * 3 packets per second 1259 */ 1260 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { 1261 /* check if there is something to send */ 1262 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { 1263 __update_lacpdu_from_port(port); 1264 1265 if (ad_lacpdu_send(port) >= 0) { 1266 pr_debug("Sent LACPDU on port %d\n", 1267 port->actor_port_number); 1268 1269 /* mark ntt as false, so it will not be sent 1270 * again until demanded 1271 */ 1272 port->ntt = false; 1273 } 1274 } 1275 /* restart tx timer(to verify that we will not exceed 1276 * AD_MAX_TX_IN_SECOND 1277 */ 1278 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 1279 } 1280 } 1281 1282 /** 1283 * ad_periodic_machine - handle a port's periodic state machine 1284 * @port: the port we're looking at 1285 * 1286 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. 1287 */ 1288 static void ad_periodic_machine(struct port *port) 1289 { 1290 periodic_states_t last_state; 1291 1292 /* keep current state machine state to compare later if it was changed */ 1293 last_state = port->sm_periodic_state; 1294 1295 /* check if port was reinitialized */ 1296 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || 1297 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) 1298 ) { 1299 port->sm_periodic_state = AD_NO_PERIODIC; 1300 } 1301 /* check if state machine should change state */ 1302 else if (port->sm_periodic_timer_counter) { 1303 /* check if periodic state machine expired */ 1304 if (!(--port->sm_periodic_timer_counter)) { 1305 /* if expired then do tx */ 1306 port->sm_periodic_state = AD_PERIODIC_TX; 1307 } else { 1308 /* If not expired, check if there is some new timeout 1309 * parameter from the partner state 1310 */ 1311 switch (port->sm_periodic_state) { 1312 case AD_FAST_PERIODIC: 1313 if (!(port->partner_oper.port_state 1314 & AD_STATE_LACP_TIMEOUT)) 1315 port->sm_periodic_state = AD_SLOW_PERIODIC; 1316 break; 1317 case AD_SLOW_PERIODIC: 1318 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { 1319 port->sm_periodic_timer_counter = 0; 1320 port->sm_periodic_state = AD_PERIODIC_TX; 1321 } 1322 break; 1323 default: 1324 break; 1325 } 1326 } 1327 } else { 1328 switch (port->sm_periodic_state) { 1329 case AD_NO_PERIODIC: 1330 port->sm_periodic_state = AD_FAST_PERIODIC; 1331 break; 1332 case AD_PERIODIC_TX: 1333 if (!(port->partner_oper.port_state & 1334 AD_STATE_LACP_TIMEOUT)) 1335 port->sm_periodic_state = AD_SLOW_PERIODIC; 1336 else 1337 port->sm_periodic_state = AD_FAST_PERIODIC; 1338 break; 1339 default: 1340 break; 1341 } 1342 } 1343 1344 /* check if the state machine was changed */ 1345 if (port->sm_periodic_state != last_state) { 1346 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", 1347 port->actor_port_number, last_state, 1348 port->sm_periodic_state); 1349 switch (port->sm_periodic_state) { 1350 case AD_NO_PERIODIC: 1351 port->sm_periodic_timer_counter = 0; 1352 break; 1353 case AD_FAST_PERIODIC: 1354 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1355 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; 1356 break; 1357 case AD_SLOW_PERIODIC: 1358 /* decrement 1 tick we lost in the PERIODIC_TX cycle */ 1359 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; 1360 break; 1361 case AD_PERIODIC_TX: 1362 port->ntt = true; 1363 break; 1364 default: 1365 break; 1366 } 1367 } 1368 } 1369 1370 /** 1371 * ad_port_selection_logic - select aggregation groups 1372 * @port: the port we're looking at 1373 * @update_slave_arr: Does slave array need update? 1374 * 1375 * Select aggregation groups, and assign each port for it's aggregetor. The 1376 * selection logic is called in the inititalization (after all the handshkes), 1377 * and after every lacpdu receive (if selected is off). 1378 */ 1379 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) 1380 { 1381 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; 1382 struct port *last_port = NULL, *curr_port; 1383 struct list_head *iter; 1384 struct bonding *bond; 1385 struct slave *slave; 1386 int found = 0; 1387 1388 /* if the port is already Selected, do nothing */ 1389 if (port->sm_vars & AD_PORT_SELECTED) 1390 return; 1391 1392 bond = __get_bond_by_port(port); 1393 1394 /* if the port is connected to other aggregator, detach it */ 1395 if (port->aggregator) { 1396 /* detach the port from its former aggregator */ 1397 temp_aggregator = port->aggregator; 1398 for (curr_port = temp_aggregator->lag_ports; curr_port; 1399 last_port = curr_port, 1400 curr_port = curr_port->next_port_in_aggregator) { 1401 if (curr_port == port) { 1402 temp_aggregator->num_of_ports--; 1403 /* if it is the first port attached to the 1404 * aggregator 1405 */ 1406 if (!last_port) { 1407 temp_aggregator->lag_ports = 1408 port->next_port_in_aggregator; 1409 } else { 1410 /* not the first port attached to the 1411 * aggregator 1412 */ 1413 last_port->next_port_in_aggregator = 1414 port->next_port_in_aggregator; 1415 } 1416 1417 /* clear the port's relations to this 1418 * aggregator 1419 */ 1420 port->aggregator = NULL; 1421 port->next_port_in_aggregator = NULL; 1422 port->actor_port_aggregator_identifier = 0; 1423 1424 netdev_dbg(bond->dev, "Port %d left LAG %d\n", 1425 port->actor_port_number, 1426 temp_aggregator->aggregator_identifier); 1427 /* if the aggregator is empty, clear its 1428 * parameters, and set it ready to be attached 1429 */ 1430 if (!temp_aggregator->lag_ports) 1431 ad_clear_agg(temp_aggregator); 1432 break; 1433 } 1434 } 1435 if (!curr_port) { 1436 /* meaning: the port was related to an aggregator 1437 * but was not on the aggregator port list 1438 */ 1439 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", 1440 port->slave->bond->dev->name, 1441 port->actor_port_number, 1442 port->slave->dev->name, 1443 port->aggregator->aggregator_identifier); 1444 } 1445 } 1446 /* search on all aggregators for a suitable aggregator for this port */ 1447 bond_for_each_slave(bond, slave, iter) { 1448 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 1449 1450 /* keep a free aggregator for later use(if needed) */ 1451 if (!aggregator->lag_ports) { 1452 if (!free_aggregator) 1453 free_aggregator = aggregator; 1454 continue; 1455 } 1456 /* check if current aggregator suits us */ 1457 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ 1458 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && 1459 (aggregator->partner_system_priority == port->partner_oper.system_priority) && 1460 (aggregator->partner_oper_aggregator_key == port->partner_oper.key) 1461 ) && 1462 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ 1463 !aggregator->is_individual) /* but is not individual OR */ 1464 ) 1465 ) { 1466 /* attach to the founded aggregator */ 1467 port->aggregator = aggregator; 1468 port->actor_port_aggregator_identifier = 1469 port->aggregator->aggregator_identifier; 1470 port->next_port_in_aggregator = aggregator->lag_ports; 1471 port->aggregator->num_of_ports++; 1472 aggregator->lag_ports = port; 1473 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", 1474 port->actor_port_number, 1475 port->aggregator->aggregator_identifier); 1476 1477 /* mark this port as selected */ 1478 port->sm_vars |= AD_PORT_SELECTED; 1479 found = 1; 1480 break; 1481 } 1482 } 1483 1484 /* the port couldn't find an aggregator - attach it to a new 1485 * aggregator 1486 */ 1487 if (!found) { 1488 if (free_aggregator) { 1489 /* assign port a new aggregator */ 1490 port->aggregator = free_aggregator; 1491 port->actor_port_aggregator_identifier = 1492 port->aggregator->aggregator_identifier; 1493 1494 /* update the new aggregator's parameters 1495 * if port was responsed from the end-user 1496 */ 1497 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) 1498 /* if port is full duplex */ 1499 port->aggregator->is_individual = false; 1500 else 1501 port->aggregator->is_individual = true; 1502 1503 port->aggregator->actor_admin_aggregator_key = 1504 port->actor_admin_port_key; 1505 port->aggregator->actor_oper_aggregator_key = 1506 port->actor_oper_port_key; 1507 port->aggregator->partner_system = 1508 port->partner_oper.system; 1509 port->aggregator->partner_system_priority = 1510 port->partner_oper.system_priority; 1511 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; 1512 port->aggregator->receive_state = 1; 1513 port->aggregator->transmit_state = 1; 1514 port->aggregator->lag_ports = port; 1515 port->aggregator->num_of_ports++; 1516 1517 /* mark this port as selected */ 1518 port->sm_vars |= AD_PORT_SELECTED; 1519 1520 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", 1521 port->actor_port_number, 1522 port->aggregator->aggregator_identifier); 1523 } else { 1524 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", 1525 port->actor_port_number, port->slave->dev->name); 1526 } 1527 } 1528 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE 1529 * in all aggregator's ports, else set ready=FALSE in all 1530 * aggregator's ports 1531 */ 1532 __set_agg_ports_ready(port->aggregator, 1533 __agg_ports_are_ready(port->aggregator)); 1534 1535 aggregator = __get_first_agg(port); 1536 ad_agg_selection_logic(aggregator, update_slave_arr); 1537 1538 if (!port->aggregator->is_active) 1539 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 1540 } 1541 1542 /* Decide if "agg" is a better choice for the new active aggregator that 1543 * the current best, according to the ad_select policy. 1544 */ 1545 static struct aggregator *ad_agg_selection_test(struct aggregator *best, 1546 struct aggregator *curr) 1547 { 1548 /* 0. If no best, select current. 1549 * 1550 * 1. If the current agg is not individual, and the best is 1551 * individual, select current. 1552 * 1553 * 2. If current agg is individual and the best is not, keep best. 1554 * 1555 * 3. Therefore, current and best are both individual or both not 1556 * individual, so: 1557 * 1558 * 3a. If current agg partner replied, and best agg partner did not, 1559 * select current. 1560 * 1561 * 3b. If current agg partner did not reply and best agg partner 1562 * did reply, keep best. 1563 * 1564 * 4. Therefore, current and best both have partner replies or 1565 * both do not, so perform selection policy: 1566 * 1567 * BOND_AD_COUNT: Select by count of ports. If count is equal, 1568 * select by bandwidth. 1569 * 1570 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. 1571 */ 1572 if (!best) 1573 return curr; 1574 1575 if (!curr->is_individual && best->is_individual) 1576 return curr; 1577 1578 if (curr->is_individual && !best->is_individual) 1579 return best; 1580 1581 if (__agg_has_partner(curr) && !__agg_has_partner(best)) 1582 return curr; 1583 1584 if (!__agg_has_partner(curr) && __agg_has_partner(best)) 1585 return best; 1586 1587 switch (__get_agg_selection_mode(curr->lag_ports)) { 1588 case BOND_AD_COUNT: 1589 if (__agg_active_ports(curr) > __agg_active_ports(best)) 1590 return curr; 1591 1592 if (__agg_active_ports(curr) < __agg_active_ports(best)) 1593 return best; 1594 1595 /*FALLTHROUGH*/ 1596 case BOND_AD_STABLE: 1597 case BOND_AD_BANDWIDTH: 1598 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) 1599 return curr; 1600 1601 break; 1602 1603 default: 1604 net_warn_ratelimited("%s: Impossible agg select mode %d\n", 1605 curr->slave->bond->dev->name, 1606 __get_agg_selection_mode(curr->lag_ports)); 1607 break; 1608 } 1609 1610 return best; 1611 } 1612 1613 static int agg_device_up(const struct aggregator *agg) 1614 { 1615 struct port *port = agg->lag_ports; 1616 1617 if (!port) 1618 return 0; 1619 1620 for (port = agg->lag_ports; port; 1621 port = port->next_port_in_aggregator) { 1622 if (netif_running(port->slave->dev) && 1623 netif_carrier_ok(port->slave->dev)) 1624 return 1; 1625 } 1626 1627 return 0; 1628 } 1629 1630 /** 1631 * ad_agg_selection_logic - select an aggregation group for a team 1632 * @aggregator: the aggregator we're looking at 1633 * @update_slave_arr: Does slave array need update? 1634 * 1635 * It is assumed that only one aggregator may be selected for a team. 1636 * 1637 * The logic of this function is to select the aggregator according to 1638 * the ad_select policy: 1639 * 1640 * BOND_AD_STABLE: select the aggregator with the most ports attached to 1641 * it, and to reselect the active aggregator only if the previous 1642 * aggregator has no more ports related to it. 1643 * 1644 * BOND_AD_BANDWIDTH: select the aggregator with the highest total 1645 * bandwidth, and reselect whenever a link state change takes place or the 1646 * set of slaves in the bond changes. 1647 * 1648 * BOND_AD_COUNT: select the aggregator with largest number of ports 1649 * (slaves), and reselect whenever a link state change takes place or the 1650 * set of slaves in the bond changes. 1651 * 1652 * FIXME: this function MUST be called with the first agg in the bond, or 1653 * __get_active_agg() won't work correctly. This function should be better 1654 * called with the bond itself, and retrieve the first agg from it. 1655 */ 1656 static void ad_agg_selection_logic(struct aggregator *agg, 1657 bool *update_slave_arr) 1658 { 1659 struct aggregator *best, *active, *origin; 1660 struct bonding *bond = agg->slave->bond; 1661 struct list_head *iter; 1662 struct slave *slave; 1663 struct port *port; 1664 1665 rcu_read_lock(); 1666 origin = agg; 1667 active = __get_active_agg(agg); 1668 best = (active && agg_device_up(active)) ? active : NULL; 1669 1670 bond_for_each_slave_rcu(bond, slave, iter) { 1671 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1672 1673 agg->is_active = 0; 1674 1675 if (__agg_active_ports(agg) && agg_device_up(agg)) 1676 best = ad_agg_selection_test(best, agg); 1677 } 1678 1679 if (best && 1680 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { 1681 /* For the STABLE policy, don't replace the old active 1682 * aggregator if it's still active (it has an answering 1683 * partner) or if both the best and active don't have an 1684 * answering partner. 1685 */ 1686 if (active && active->lag_ports && 1687 __agg_active_ports(active) && 1688 (__agg_has_partner(active) || 1689 (!__agg_has_partner(active) && 1690 !__agg_has_partner(best)))) { 1691 if (!(!active->actor_oper_aggregator_key && 1692 best->actor_oper_aggregator_key)) { 1693 best = NULL; 1694 active->is_active = 1; 1695 } 1696 } 1697 } 1698 1699 if (best && (best == active)) { 1700 best = NULL; 1701 active->is_active = 1; 1702 } 1703 1704 /* if there is new best aggregator, activate it */ 1705 if (best) { 1706 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1707 best->aggregator_identifier, best->num_of_ports, 1708 best->actor_oper_aggregator_key, 1709 best->partner_oper_aggregator_key, 1710 best->is_individual, best->is_active); 1711 netdev_dbg(bond->dev, "best ports %p slave %p %s\n", 1712 best->lag_ports, best->slave, 1713 best->slave ? best->slave->dev->name : "NULL"); 1714 1715 bond_for_each_slave_rcu(bond, slave, iter) { 1716 agg = &(SLAVE_AD_INFO(slave)->aggregator); 1717 1718 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1719 agg->aggregator_identifier, agg->num_of_ports, 1720 agg->actor_oper_aggregator_key, 1721 agg->partner_oper_aggregator_key, 1722 agg->is_individual, agg->is_active); 1723 } 1724 1725 /* check if any partner replys */ 1726 if (best->is_individual) { 1727 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", 1728 best->slave ? 1729 best->slave->bond->dev->name : "NULL"); 1730 } 1731 1732 best->is_active = 1; 1733 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", 1734 best->aggregator_identifier); 1735 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", 1736 best->aggregator_identifier, best->num_of_ports, 1737 best->actor_oper_aggregator_key, 1738 best->partner_oper_aggregator_key, 1739 best->is_individual, best->is_active); 1740 1741 /* disable the ports that were related to the former 1742 * active_aggregator 1743 */ 1744 if (active) { 1745 for (port = active->lag_ports; port; 1746 port = port->next_port_in_aggregator) { 1747 __disable_port(port); 1748 } 1749 } 1750 /* Slave array needs update. */ 1751 *update_slave_arr = true; 1752 } 1753 1754 /* if the selected aggregator is of join individuals 1755 * (partner_system is NULL), enable their ports 1756 */ 1757 active = __get_active_agg(origin); 1758 1759 if (active) { 1760 if (!__agg_has_partner(active)) { 1761 for (port = active->lag_ports; port; 1762 port = port->next_port_in_aggregator) { 1763 __enable_port(port); 1764 } 1765 } 1766 } 1767 1768 rcu_read_unlock(); 1769 1770 bond_3ad_set_carrier(bond); 1771 } 1772 1773 /** 1774 * ad_clear_agg - clear a given aggregator's parameters 1775 * @aggregator: the aggregator we're looking at 1776 */ 1777 static void ad_clear_agg(struct aggregator *aggregator) 1778 { 1779 if (aggregator) { 1780 aggregator->is_individual = false; 1781 aggregator->actor_admin_aggregator_key = 0; 1782 aggregator->actor_oper_aggregator_key = 0; 1783 eth_zero_addr(aggregator->partner_system.mac_addr_value); 1784 aggregator->partner_system_priority = 0; 1785 aggregator->partner_oper_aggregator_key = 0; 1786 aggregator->receive_state = 0; 1787 aggregator->transmit_state = 0; 1788 aggregator->lag_ports = NULL; 1789 aggregator->is_active = 0; 1790 aggregator->num_of_ports = 0; 1791 pr_debug("LAG %d was cleared\n", 1792 aggregator->aggregator_identifier); 1793 } 1794 } 1795 1796 /** 1797 * ad_initialize_agg - initialize a given aggregator's parameters 1798 * @aggregator: the aggregator we're looking at 1799 */ 1800 static void ad_initialize_agg(struct aggregator *aggregator) 1801 { 1802 if (aggregator) { 1803 ad_clear_agg(aggregator); 1804 1805 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); 1806 aggregator->aggregator_identifier = 0; 1807 aggregator->slave = NULL; 1808 } 1809 } 1810 1811 /** 1812 * ad_initialize_port - initialize a given port's parameters 1813 * @aggregator: the aggregator we're looking at 1814 * @lacp_fast: boolean. whether fast periodic should be used 1815 */ 1816 static void ad_initialize_port(struct port *port, int lacp_fast) 1817 { 1818 static const struct port_params tmpl = { 1819 .system_priority = 0xffff, 1820 .key = 1, 1821 .port_number = 1, 1822 .port_priority = 0xff, 1823 .port_state = 1, 1824 }; 1825 static const struct lacpdu lacpdu = { 1826 .subtype = 0x01, 1827 .version_number = 0x01, 1828 .tlv_type_actor_info = 0x01, 1829 .actor_information_length = 0x14, 1830 .tlv_type_partner_info = 0x02, 1831 .partner_information_length = 0x14, 1832 .tlv_type_collector_info = 0x03, 1833 .collector_information_length = 0x10, 1834 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), 1835 }; 1836 1837 if (port) { 1838 port->actor_port_priority = 0xff; 1839 port->actor_port_aggregator_identifier = 0; 1840 port->ntt = false; 1841 port->actor_admin_port_state = AD_STATE_AGGREGATION | 1842 AD_STATE_LACP_ACTIVITY; 1843 port->actor_oper_port_state = AD_STATE_AGGREGATION | 1844 AD_STATE_LACP_ACTIVITY; 1845 1846 if (lacp_fast) 1847 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 1848 1849 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); 1850 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); 1851 1852 port->is_enabled = true; 1853 /* private parameters */ 1854 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; 1855 port->sm_rx_state = 0; 1856 port->sm_rx_timer_counter = 0; 1857 port->sm_periodic_state = 0; 1858 port->sm_periodic_timer_counter = 0; 1859 port->sm_mux_state = 0; 1860 port->sm_mux_timer_counter = 0; 1861 port->sm_tx_state = 0; 1862 port->aggregator = NULL; 1863 port->next_port_in_aggregator = NULL; 1864 port->transaction_id = 0; 1865 1866 port->sm_churn_actor_timer_counter = 0; 1867 port->sm_churn_actor_state = 0; 1868 port->churn_actor_count = 0; 1869 port->sm_churn_partner_timer_counter = 0; 1870 port->sm_churn_partner_state = 0; 1871 port->churn_partner_count = 0; 1872 1873 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); 1874 } 1875 } 1876 1877 /** 1878 * ad_enable_collecting_distributing - enable a port's transmit/receive 1879 * @port: the port we're looking at 1880 * @update_slave_arr: Does slave array need update? 1881 * 1882 * Enable @port if it's in an active aggregator 1883 */ 1884 static void ad_enable_collecting_distributing(struct port *port, 1885 bool *update_slave_arr) 1886 { 1887 if (port->aggregator->is_active) { 1888 pr_debug("Enabling port %d(LAG %d)\n", 1889 port->actor_port_number, 1890 port->aggregator->aggregator_identifier); 1891 __enable_port(port); 1892 /* Slave array needs update */ 1893 *update_slave_arr = true; 1894 } 1895 } 1896 1897 /** 1898 * ad_disable_collecting_distributing - disable a port's transmit/receive 1899 * @port: the port we're looking at 1900 * @update_slave_arr: Does slave array need update? 1901 */ 1902 static void ad_disable_collecting_distributing(struct port *port, 1903 bool *update_slave_arr) 1904 { 1905 if (port->aggregator && 1906 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), 1907 &(null_mac_addr))) { 1908 pr_debug("Disabling port %d(LAG %d)\n", 1909 port->actor_port_number, 1910 port->aggregator->aggregator_identifier); 1911 __disable_port(port); 1912 /* Slave array needs an update */ 1913 *update_slave_arr = true; 1914 } 1915 } 1916 1917 /** 1918 * ad_marker_info_received - handle receive of a Marker information frame 1919 * @marker_info: Marker info received 1920 * @port: the port we're looking at 1921 */ 1922 static void ad_marker_info_received(struct bond_marker *marker_info, 1923 struct port *port) 1924 { 1925 struct bond_marker marker; 1926 1927 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx); 1928 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx); 1929 1930 /* copy the received marker data to the response marker */ 1931 memcpy(&marker, marker_info, sizeof(struct bond_marker)); 1932 /* change the marker subtype to marker response */ 1933 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; 1934 1935 /* send the marker response */ 1936 if (ad_marker_send(port, &marker) >= 0) { 1937 pr_debug("Sent Marker Response on port %d\n", 1938 port->actor_port_number); 1939 } 1940 } 1941 1942 /** 1943 * ad_marker_response_received - handle receive of a marker response frame 1944 * @marker: marker PDU received 1945 * @port: the port we're looking at 1946 * 1947 * This function does nothing since we decided not to implement send and handle 1948 * response for marker PDU's, in this stage, but only to respond to marker 1949 * information. 1950 */ 1951 static void ad_marker_response_received(struct bond_marker *marker, 1952 struct port *port) 1953 { 1954 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx); 1955 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx); 1956 1957 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ 1958 } 1959 1960 /* ========= AD exported functions to the main bonding code ========= */ 1961 1962 /* Check aggregators status in team every T seconds */ 1963 #define AD_AGGREGATOR_SELECTION_TIMER 8 1964 1965 /** 1966 * bond_3ad_initiate_agg_selection - initate aggregator selection 1967 * @bond: bonding struct 1968 * 1969 * Set the aggregation selection timer, to initiate an agg selection in 1970 * the very near future. Called during first initialization, and during 1971 * any down to up transitions of the bond. 1972 */ 1973 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) 1974 { 1975 BOND_AD_INFO(bond).agg_select_timer = timeout; 1976 } 1977 1978 /** 1979 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures 1980 * @bond: bonding struct to work on 1981 * @tick_resolution: tick duration (millisecond resolution) 1982 * 1983 * Can be called only after the mac address of the bond is set. 1984 */ 1985 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) 1986 { 1987 /* check that the bond is not initialized yet */ 1988 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), 1989 bond->dev->dev_addr)) { 1990 1991 BOND_AD_INFO(bond).aggregator_identifier = 0; 1992 1993 BOND_AD_INFO(bond).system.sys_priority = 1994 bond->params.ad_actor_sys_prio; 1995 if (is_zero_ether_addr(bond->params.ad_actor_system)) 1996 BOND_AD_INFO(bond).system.sys_mac_addr = 1997 *((struct mac_addr *)bond->dev->dev_addr); 1998 else 1999 BOND_AD_INFO(bond).system.sys_mac_addr = 2000 *((struct mac_addr *)bond->params.ad_actor_system); 2001 2002 /* initialize how many times this module is called in one 2003 * second (should be about every 100ms) 2004 */ 2005 ad_ticks_per_sec = tick_resolution; 2006 2007 bond_3ad_initiate_agg_selection(bond, 2008 AD_AGGREGATOR_SELECTION_TIMER * 2009 ad_ticks_per_sec); 2010 } 2011 } 2012 2013 /** 2014 * bond_3ad_bind_slave - initialize a slave's port 2015 * @slave: slave struct to work on 2016 * 2017 * Returns: 0 on success 2018 * < 0 on error 2019 */ 2020 void bond_3ad_bind_slave(struct slave *slave) 2021 { 2022 struct bonding *bond = bond_get_bond_by_slave(slave); 2023 struct port *port; 2024 struct aggregator *aggregator; 2025 2026 /* check that the slave has not been initialized yet. */ 2027 if (SLAVE_AD_INFO(slave)->port.slave != slave) { 2028 2029 /* port initialization */ 2030 port = &(SLAVE_AD_INFO(slave)->port); 2031 2032 ad_initialize_port(port, bond->params.lacp_fast); 2033 2034 port->slave = slave; 2035 port->actor_port_number = SLAVE_AD_INFO(slave)->id; 2036 /* key is determined according to the link speed, duplex and 2037 * user key 2038 */ 2039 port->actor_admin_port_key = bond->params.ad_user_port_key << 6; 2040 ad_update_actor_keys(port, false); 2041 /* actor system is the bond's system */ 2042 __ad_actor_update_port(port); 2043 /* tx timer(to verify that no more than MAX_TX_IN_SECOND 2044 * lacpdu's are sent in one second) 2045 */ 2046 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; 2047 2048 __disable_port(port); 2049 2050 /* aggregator initialization */ 2051 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2052 2053 ad_initialize_agg(aggregator); 2054 2055 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); 2056 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; 2057 aggregator->slave = slave; 2058 aggregator->is_active = 0; 2059 aggregator->num_of_ports = 0; 2060 } 2061 } 2062 2063 /** 2064 * bond_3ad_unbind_slave - deinitialize a slave's port 2065 * @slave: slave struct to work on 2066 * 2067 * Search for the aggregator that is related to this port, remove the 2068 * aggregator and assign another aggregator for other port related to it 2069 * (if any), and remove the port. 2070 */ 2071 void bond_3ad_unbind_slave(struct slave *slave) 2072 { 2073 struct port *port, *prev_port, *temp_port; 2074 struct aggregator *aggregator, *new_aggregator, *temp_aggregator; 2075 int select_new_active_agg = 0; 2076 struct bonding *bond = slave->bond; 2077 struct slave *slave_iter; 2078 struct list_head *iter; 2079 bool dummy_slave_update; /* Ignore this value as caller updates array */ 2080 2081 /* Sync against bond_3ad_state_machine_handler() */ 2082 spin_lock_bh(&bond->mode_lock); 2083 aggregator = &(SLAVE_AD_INFO(slave)->aggregator); 2084 port = &(SLAVE_AD_INFO(slave)->port); 2085 2086 /* if slave is null, the whole port is not initialized */ 2087 if (!port->slave) { 2088 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", 2089 slave->dev->name); 2090 goto out; 2091 } 2092 2093 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", 2094 aggregator->aggregator_identifier); 2095 2096 /* Tell the partner that this port is not suitable for aggregation */ 2097 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; 2098 port->actor_oper_port_state &= ~AD_STATE_COLLECTING; 2099 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; 2100 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; 2101 __update_lacpdu_from_port(port); 2102 ad_lacpdu_send(port); 2103 2104 /* check if this aggregator is occupied */ 2105 if (aggregator->lag_ports) { 2106 /* check if there are other ports related to this aggregator 2107 * except the port related to this slave(thats ensure us that 2108 * there is a reason to search for new aggregator, and that we 2109 * will find one 2110 */ 2111 if ((aggregator->lag_ports != port) || 2112 (aggregator->lag_ports->next_port_in_aggregator)) { 2113 /* find new aggregator for the related port(s) */ 2114 bond_for_each_slave(bond, slave_iter, iter) { 2115 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2116 /* if the new aggregator is empty, or it is 2117 * connected to our port only 2118 */ 2119 if (!new_aggregator->lag_ports || 2120 ((new_aggregator->lag_ports == port) && 2121 !new_aggregator->lag_ports->next_port_in_aggregator)) 2122 break; 2123 } 2124 if (!slave_iter) 2125 new_aggregator = NULL; 2126 2127 /* if new aggregator found, copy the aggregator's 2128 * parameters and connect the related lag_ports to the 2129 * new aggregator 2130 */ 2131 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { 2132 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", 2133 aggregator->aggregator_identifier, 2134 new_aggregator->aggregator_identifier); 2135 2136 if ((new_aggregator->lag_ports == port) && 2137 new_aggregator->is_active) { 2138 netdev_info(bond->dev, "Removing an active aggregator\n"); 2139 select_new_active_agg = 1; 2140 } 2141 2142 new_aggregator->is_individual = aggregator->is_individual; 2143 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; 2144 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; 2145 new_aggregator->partner_system = aggregator->partner_system; 2146 new_aggregator->partner_system_priority = aggregator->partner_system_priority; 2147 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; 2148 new_aggregator->receive_state = aggregator->receive_state; 2149 new_aggregator->transmit_state = aggregator->transmit_state; 2150 new_aggregator->lag_ports = aggregator->lag_ports; 2151 new_aggregator->is_active = aggregator->is_active; 2152 new_aggregator->num_of_ports = aggregator->num_of_ports; 2153 2154 /* update the information that is written on 2155 * the ports about the aggregator 2156 */ 2157 for (temp_port = aggregator->lag_ports; temp_port; 2158 temp_port = temp_port->next_port_in_aggregator) { 2159 temp_port->aggregator = new_aggregator; 2160 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; 2161 } 2162 2163 ad_clear_agg(aggregator); 2164 2165 if (select_new_active_agg) 2166 ad_agg_selection_logic(__get_first_agg(port), 2167 &dummy_slave_update); 2168 } else { 2169 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); 2170 } 2171 } else { 2172 /* in case that the only port related to this 2173 * aggregator is the one we want to remove 2174 */ 2175 select_new_active_agg = aggregator->is_active; 2176 ad_clear_agg(aggregator); 2177 if (select_new_active_agg) { 2178 netdev_info(bond->dev, "Removing an active aggregator\n"); 2179 /* select new active aggregator */ 2180 temp_aggregator = __get_first_agg(port); 2181 if (temp_aggregator) 2182 ad_agg_selection_logic(temp_aggregator, 2183 &dummy_slave_update); 2184 } 2185 } 2186 } 2187 2188 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); 2189 2190 /* find the aggregator that this port is connected to */ 2191 bond_for_each_slave(bond, slave_iter, iter) { 2192 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); 2193 prev_port = NULL; 2194 /* search the port in the aggregator's related ports */ 2195 for (temp_port = temp_aggregator->lag_ports; temp_port; 2196 prev_port = temp_port, 2197 temp_port = temp_port->next_port_in_aggregator) { 2198 if (temp_port == port) { 2199 /* the aggregator found - detach the port from 2200 * this aggregator 2201 */ 2202 if (prev_port) 2203 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; 2204 else 2205 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; 2206 temp_aggregator->num_of_ports--; 2207 if (__agg_active_ports(temp_aggregator) == 0) { 2208 select_new_active_agg = temp_aggregator->is_active; 2209 ad_clear_agg(temp_aggregator); 2210 if (select_new_active_agg) { 2211 netdev_info(bond->dev, "Removing an active aggregator\n"); 2212 /* select new active aggregator */ 2213 ad_agg_selection_logic(__get_first_agg(port), 2214 &dummy_slave_update); 2215 } 2216 } 2217 break; 2218 } 2219 } 2220 } 2221 port->slave = NULL; 2222 2223 out: 2224 spin_unlock_bh(&bond->mode_lock); 2225 } 2226 2227 /** 2228 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports 2229 * @bond: bonding struct to work on 2230 * 2231 * If an ad_actor setting gets changed we need to update the individual port 2232 * settings so the bond device will use the new values when it gets upped. 2233 */ 2234 void bond_3ad_update_ad_actor_settings(struct bonding *bond) 2235 { 2236 struct list_head *iter; 2237 struct slave *slave; 2238 2239 ASSERT_RTNL(); 2240 2241 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; 2242 if (is_zero_ether_addr(bond->params.ad_actor_system)) 2243 BOND_AD_INFO(bond).system.sys_mac_addr = 2244 *((struct mac_addr *)bond->dev->dev_addr); 2245 else 2246 BOND_AD_INFO(bond).system.sys_mac_addr = 2247 *((struct mac_addr *)bond->params.ad_actor_system); 2248 2249 spin_lock_bh(&bond->mode_lock); 2250 bond_for_each_slave(bond, slave, iter) { 2251 struct port *port = &(SLAVE_AD_INFO(slave))->port; 2252 2253 __ad_actor_update_port(port); 2254 port->ntt = true; 2255 } 2256 spin_unlock_bh(&bond->mode_lock); 2257 } 2258 2259 /** 2260 * bond_3ad_state_machine_handler - handle state machines timeout 2261 * @bond: bonding struct to work on 2262 * 2263 * The state machine handling concept in this module is to check every tick 2264 * which state machine should operate any function. The execution order is 2265 * round robin, so when we have an interaction between state machines, the 2266 * reply of one to each other might be delayed until next tick. 2267 * 2268 * This function also complete the initialization when the agg_select_timer 2269 * times out, and it selects an aggregator for the ports that are yet not 2270 * related to any aggregator, and selects the active aggregator for a bond. 2271 */ 2272 void bond_3ad_state_machine_handler(struct work_struct *work) 2273 { 2274 struct bonding *bond = container_of(work, struct bonding, 2275 ad_work.work); 2276 struct aggregator *aggregator; 2277 struct list_head *iter; 2278 struct slave *slave; 2279 struct port *port; 2280 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; 2281 bool update_slave_arr = false; 2282 2283 /* Lock to protect data accessed by all (e.g., port->sm_vars) and 2284 * against running with bond_3ad_unbind_slave. ad_rx_machine may run 2285 * concurrently due to incoming LACPDU as well. 2286 */ 2287 spin_lock_bh(&bond->mode_lock); 2288 rcu_read_lock(); 2289 2290 /* check if there are any slaves */ 2291 if (!bond_has_slaves(bond)) 2292 goto re_arm; 2293 2294 /* check if agg_select_timer timer after initialize is timed out */ 2295 if (BOND_AD_INFO(bond).agg_select_timer && 2296 !(--BOND_AD_INFO(bond).agg_select_timer)) { 2297 slave = bond_first_slave_rcu(bond); 2298 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; 2299 2300 /* select the active aggregator for the bond */ 2301 if (port) { 2302 if (!port->slave) { 2303 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", 2304 bond->dev->name); 2305 goto re_arm; 2306 } 2307 2308 aggregator = __get_first_agg(port); 2309 ad_agg_selection_logic(aggregator, &update_slave_arr); 2310 } 2311 bond_3ad_set_carrier(bond); 2312 } 2313 2314 /* for each port run the state machines */ 2315 bond_for_each_slave_rcu(bond, slave, iter) { 2316 port = &(SLAVE_AD_INFO(slave)->port); 2317 if (!port->slave) { 2318 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", 2319 bond->dev->name); 2320 goto re_arm; 2321 } 2322 2323 ad_rx_machine(NULL, port); 2324 ad_periodic_machine(port); 2325 ad_port_selection_logic(port, &update_slave_arr); 2326 ad_mux_machine(port, &update_slave_arr); 2327 ad_tx_machine(port); 2328 ad_churn_machine(port); 2329 2330 /* turn off the BEGIN bit, since we already handled it */ 2331 if (port->sm_vars & AD_PORT_BEGIN) 2332 port->sm_vars &= ~AD_PORT_BEGIN; 2333 } 2334 2335 re_arm: 2336 bond_for_each_slave_rcu(bond, slave, iter) { 2337 if (slave->should_notify) { 2338 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; 2339 break; 2340 } 2341 } 2342 rcu_read_unlock(); 2343 spin_unlock_bh(&bond->mode_lock); 2344 2345 if (update_slave_arr) 2346 bond_slave_arr_work_rearm(bond, 0); 2347 2348 if (should_notify_rtnl && rtnl_trylock()) { 2349 bond_slave_state_notify(bond); 2350 rtnl_unlock(); 2351 } 2352 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); 2353 } 2354 2355 /** 2356 * bond_3ad_rx_indication - handle a received frame 2357 * @lacpdu: received lacpdu 2358 * @slave: slave struct to work on 2359 * 2360 * It is assumed that frames that were sent on this NIC don't returned as new 2361 * received frames (loopback). Since only the payload is given to this 2362 * function, it check for loopback. 2363 */ 2364 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave) 2365 { 2366 struct bonding *bond = slave->bond; 2367 int ret = RX_HANDLER_ANOTHER; 2368 struct bond_marker *marker; 2369 struct port *port; 2370 atomic64_t *stat; 2371 2372 port = &(SLAVE_AD_INFO(slave)->port); 2373 if (!port->slave) { 2374 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", 2375 slave->dev->name, slave->bond->dev->name); 2376 return ret; 2377 } 2378 2379 switch (lacpdu->subtype) { 2380 case AD_TYPE_LACPDU: 2381 ret = RX_HANDLER_CONSUMED; 2382 netdev_dbg(slave->bond->dev, 2383 "Received LACPDU on port %d slave %s\n", 2384 port->actor_port_number, slave->dev->name); 2385 /* Protect against concurrent state machines */ 2386 spin_lock(&slave->bond->mode_lock); 2387 ad_rx_machine(lacpdu, port); 2388 spin_unlock(&slave->bond->mode_lock); 2389 break; 2390 case AD_TYPE_MARKER: 2391 ret = RX_HANDLER_CONSUMED; 2392 /* No need to convert fields to Little Endian since we 2393 * don't use the marker's fields. 2394 */ 2395 marker = (struct bond_marker *)lacpdu; 2396 switch (marker->tlv_type) { 2397 case AD_MARKER_INFORMATION_SUBTYPE: 2398 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", 2399 port->actor_port_number); 2400 ad_marker_info_received(marker, port); 2401 break; 2402 case AD_MARKER_RESPONSE_SUBTYPE: 2403 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", 2404 port->actor_port_number); 2405 ad_marker_response_received(marker, port); 2406 break; 2407 default: 2408 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", 2409 port->actor_port_number); 2410 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx; 2411 atomic64_inc(stat); 2412 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx; 2413 atomic64_inc(stat); 2414 } 2415 break; 2416 default: 2417 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx); 2418 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx); 2419 } 2420 2421 return ret; 2422 } 2423 2424 /** 2425 * ad_update_actor_keys - Update the oper / admin keys for a port based on 2426 * its current speed and duplex settings. 2427 * 2428 * @port: the port we'are looking at 2429 * @reset: Boolean to just reset the speed and the duplex part of the key 2430 * 2431 * The logic to change the oper / admin keys is: 2432 * (a) A full duplex port can participate in LACP with partner. 2433 * (b) When the speed is changed, LACP need to be reinitiated. 2434 */ 2435 static void ad_update_actor_keys(struct port *port, bool reset) 2436 { 2437 u8 duplex = 0; 2438 u16 ospeed = 0, speed = 0; 2439 u16 old_oper_key = port->actor_oper_port_key; 2440 2441 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); 2442 if (!reset) { 2443 speed = __get_link_speed(port); 2444 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; 2445 duplex = __get_duplex(port); 2446 port->actor_admin_port_key |= (speed << 1) | duplex; 2447 } 2448 port->actor_oper_port_key = port->actor_admin_port_key; 2449 2450 if (old_oper_key != port->actor_oper_port_key) { 2451 /* Only 'duplex' port participates in LACP */ 2452 if (duplex) 2453 port->sm_vars |= AD_PORT_LACP_ENABLED; 2454 else 2455 port->sm_vars &= ~AD_PORT_LACP_ENABLED; 2456 2457 if (!reset) { 2458 if (!speed) { 2459 netdev_err(port->slave->dev, 2460 "speed changed to 0 for port %s", 2461 port->slave->dev->name); 2462 } else if (duplex && ospeed != speed) { 2463 /* Speed change restarts LACP state-machine */ 2464 port->sm_vars |= AD_PORT_BEGIN; 2465 } 2466 } 2467 } 2468 } 2469 2470 /** 2471 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex 2472 * change indication 2473 * 2474 * @slave: slave struct to work on 2475 * 2476 * Handle reselection of aggregator (if needed) for this port. 2477 */ 2478 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) 2479 { 2480 struct port *port; 2481 2482 port = &(SLAVE_AD_INFO(slave)->port); 2483 2484 /* if slave is null, the whole port is not initialized */ 2485 if (!port->slave) { 2486 netdev_warn(slave->bond->dev, 2487 "speed/duplex changed for uninitialized port %s\n", 2488 slave->dev->name); 2489 return; 2490 } 2491 2492 spin_lock_bh(&slave->bond->mode_lock); 2493 ad_update_actor_keys(port, false); 2494 spin_unlock_bh(&slave->bond->mode_lock); 2495 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", 2496 port->actor_port_number, slave->dev->name); 2497 } 2498 2499 /** 2500 * bond_3ad_handle_link_change - handle a slave's link status change indication 2501 * @slave: slave struct to work on 2502 * @status: whether the link is now up or down 2503 * 2504 * Handle reselection of aggregator (if needed) for this port. 2505 */ 2506 void bond_3ad_handle_link_change(struct slave *slave, char link) 2507 { 2508 struct aggregator *agg; 2509 struct port *port; 2510 bool dummy; 2511 2512 port = &(SLAVE_AD_INFO(slave)->port); 2513 2514 /* if slave is null, the whole port is not initialized */ 2515 if (!port->slave) { 2516 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", 2517 slave->dev->name); 2518 return; 2519 } 2520 2521 spin_lock_bh(&slave->bond->mode_lock); 2522 /* on link down we are zeroing duplex and speed since 2523 * some of the adaptors(ce1000.lan) report full duplex/speed 2524 * instead of N/A(duplex) / 0(speed). 2525 * 2526 * on link up we are forcing recheck on the duplex and speed since 2527 * some of he adaptors(ce1000.lan) report. 2528 */ 2529 if (link == BOND_LINK_UP) { 2530 port->is_enabled = true; 2531 ad_update_actor_keys(port, false); 2532 } else { 2533 /* link has failed */ 2534 port->is_enabled = false; 2535 ad_update_actor_keys(port, true); 2536 } 2537 agg = __get_first_agg(port); 2538 ad_agg_selection_logic(agg, &dummy); 2539 2540 spin_unlock_bh(&slave->bond->mode_lock); 2541 2542 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", 2543 port->actor_port_number, 2544 link == BOND_LINK_UP ? "UP" : "DOWN"); 2545 2546 /* RTNL is held and mode_lock is released so it's safe 2547 * to update slave_array here. 2548 */ 2549 bond_update_slave_arr(slave->bond, NULL); 2550 } 2551 2552 /** 2553 * bond_3ad_set_carrier - set link state for bonding master 2554 * @bond - bonding structure 2555 * 2556 * if we have an active aggregator, we're up, if not, we're down. 2557 * Presumes that we cannot have an active aggregator if there are 2558 * no slaves with link up. 2559 * 2560 * This behavior complies with IEEE 802.3 section 43.3.9. 2561 * 2562 * Called by bond_set_carrier(). Return zero if carrier state does not 2563 * change, nonzero if it does. 2564 */ 2565 int bond_3ad_set_carrier(struct bonding *bond) 2566 { 2567 struct aggregator *active; 2568 struct slave *first_slave; 2569 int ret = 1; 2570 2571 rcu_read_lock(); 2572 first_slave = bond_first_slave_rcu(bond); 2573 if (!first_slave) { 2574 ret = 0; 2575 goto out; 2576 } 2577 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); 2578 if (active) { 2579 /* are enough slaves available to consider link up? */ 2580 if (__agg_active_ports(active) < bond->params.min_links) { 2581 if (netif_carrier_ok(bond->dev)) { 2582 netif_carrier_off(bond->dev); 2583 goto out; 2584 } 2585 } else if (!netif_carrier_ok(bond->dev)) { 2586 netif_carrier_on(bond->dev); 2587 goto out; 2588 } 2589 } else if (netif_carrier_ok(bond->dev)) { 2590 netif_carrier_off(bond->dev); 2591 } 2592 out: 2593 rcu_read_unlock(); 2594 return ret; 2595 } 2596 2597 /** 2598 * __bond_3ad_get_active_agg_info - get information of the active aggregator 2599 * @bond: bonding struct to work on 2600 * @ad_info: ad_info struct to fill with the bond's info 2601 * 2602 * Returns: 0 on success 2603 * < 0 on error 2604 */ 2605 int __bond_3ad_get_active_agg_info(struct bonding *bond, 2606 struct ad_info *ad_info) 2607 { 2608 struct aggregator *aggregator = NULL; 2609 struct list_head *iter; 2610 struct slave *slave; 2611 struct port *port; 2612 2613 bond_for_each_slave_rcu(bond, slave, iter) { 2614 port = &(SLAVE_AD_INFO(slave)->port); 2615 if (port->aggregator && port->aggregator->is_active) { 2616 aggregator = port->aggregator; 2617 break; 2618 } 2619 } 2620 2621 if (!aggregator) 2622 return -1; 2623 2624 ad_info->aggregator_id = aggregator->aggregator_identifier; 2625 ad_info->ports = __agg_active_ports(aggregator); 2626 ad_info->actor_key = aggregator->actor_oper_aggregator_key; 2627 ad_info->partner_key = aggregator->partner_oper_aggregator_key; 2628 ether_addr_copy(ad_info->partner_system, 2629 aggregator->partner_system.mac_addr_value); 2630 return 0; 2631 } 2632 2633 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) 2634 { 2635 int ret; 2636 2637 rcu_read_lock(); 2638 ret = __bond_3ad_get_active_agg_info(bond, ad_info); 2639 rcu_read_unlock(); 2640 2641 return ret; 2642 } 2643 2644 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, 2645 struct slave *slave) 2646 { 2647 struct lacpdu *lacpdu, _lacpdu; 2648 2649 if (skb->protocol != PKT_TYPE_LACPDU) 2650 return RX_HANDLER_ANOTHER; 2651 2652 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) 2653 return RX_HANDLER_ANOTHER; 2654 2655 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); 2656 if (!lacpdu) { 2657 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx); 2658 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx); 2659 return RX_HANDLER_ANOTHER; 2660 } 2661 2662 return bond_3ad_rx_indication(lacpdu, slave); 2663 } 2664 2665 /** 2666 * bond_3ad_update_lacp_rate - change the lacp rate 2667 * @bond - bonding struct 2668 * 2669 * When modify lacp_rate parameter via sysfs, 2670 * update actor_oper_port_state of each port. 2671 * 2672 * Hold bond->mode_lock, 2673 * so we can modify port->actor_oper_port_state, 2674 * no matter bond is up or down. 2675 */ 2676 void bond_3ad_update_lacp_rate(struct bonding *bond) 2677 { 2678 struct port *port = NULL; 2679 struct list_head *iter; 2680 struct slave *slave; 2681 int lacp_fast; 2682 2683 lacp_fast = bond->params.lacp_fast; 2684 spin_lock_bh(&bond->mode_lock); 2685 bond_for_each_slave(bond, slave, iter) { 2686 port = &(SLAVE_AD_INFO(slave)->port); 2687 if (lacp_fast) 2688 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; 2689 else 2690 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; 2691 } 2692 spin_unlock_bh(&bond->mode_lock); 2693 } 2694 2695 size_t bond_3ad_stats_size(void) 2696 { 2697 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */ 2698 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */ 2699 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */ 2700 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */ 2701 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */ 2702 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */ 2703 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */ 2704 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */ 2705 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */ 2706 } 2707 2708 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats) 2709 { 2710 u64 val; 2711 2712 val = atomic64_read(&stats->lacpdu_rx); 2713 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val, 2714 BOND_3AD_STAT_PAD)) 2715 return -EMSGSIZE; 2716 val = atomic64_read(&stats->lacpdu_tx); 2717 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val, 2718 BOND_3AD_STAT_PAD)) 2719 return -EMSGSIZE; 2720 val = atomic64_read(&stats->lacpdu_unknown_rx); 2721 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val, 2722 BOND_3AD_STAT_PAD)) 2723 return -EMSGSIZE; 2724 val = atomic64_read(&stats->lacpdu_illegal_rx); 2725 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val, 2726 BOND_3AD_STAT_PAD)) 2727 return -EMSGSIZE; 2728 2729 val = atomic64_read(&stats->marker_rx); 2730 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val, 2731 BOND_3AD_STAT_PAD)) 2732 return -EMSGSIZE; 2733 val = atomic64_read(&stats->marker_tx); 2734 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val, 2735 BOND_3AD_STAT_PAD)) 2736 return -EMSGSIZE; 2737 val = atomic64_read(&stats->marker_resp_rx); 2738 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val, 2739 BOND_3AD_STAT_PAD)) 2740 return -EMSGSIZE; 2741 val = atomic64_read(&stats->marker_resp_tx); 2742 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val, 2743 BOND_3AD_STAT_PAD)) 2744 return -EMSGSIZE; 2745 val = atomic64_read(&stats->marker_unknown_rx); 2746 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val, 2747 BOND_3AD_STAT_PAD)) 2748 return -EMSGSIZE; 2749 2750 return 0; 2751 } 2752