2929 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*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 121#define AD_LONG_TIMEOUT 022#define AD_STANDBY 0x223#define AD_MAX_TX_IN_SECOND 324#define AD_COLLECTOR_MAX_DELAY 025 26/* Timer definitions (43.4.4 in the 802.3ad standard) */27#define AD_FAST_PERIODIC_TIME 128#define AD_SLOW_PERIODIC_TIME 3029#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 6032#define AD_AGGREGATE_WAIT_TIME 233 34/* Port Variables definitions used by the State Machines (43.4.7 in the35 * 802.3ad standard)36 */37#define AD_PORT_BEGIN 0x138#define AD_PORT_LACP_ENABLED 0x239#define AD_PORT_ACTOR_CHURN 0x440#define AD_PORT_PARTNER_CHURN 0x841#define AD_PORT_READY 0x1042#define AD_PORT_READY_N 0x2043#define AD_PORT_MATCHED 0x4044#define AD_PORT_STANDBY 0x8045#define AD_PORT_SELECTED 0x10046#define AD_PORT_MOVED 0x20047#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)48 49/* Port Key definitions50 * key is determined according to the link speed, duplex and51 * user key (which is yet not supported)52 * --------------------------------------------------------------53 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|54 * --------------------------------------------------------------55 * |15 6|5 1|056 */57#define AD_DUPLEX_KEY_MASKS 0x158#define AD_SPEED_KEY_MASKS 0x3E59#define AD_USER_KEY_MASKS 0xFFC060 61enum ad_link_speed_type {62 AD_LINK_SPEED_1MBPS = 1,63 AD_LINK_SPEED_10MBPS,64 AD_LINK_SPEED_100MBPS,65 AD_LINK_SPEED_1000MBPS,66 AD_LINK_SPEED_2500MBPS,67 AD_LINK_SPEED_5000MBPS,68 AD_LINK_SPEED_10000MBPS,69 AD_LINK_SPEED_14000MBPS,70 AD_LINK_SPEED_20000MBPS,71 AD_LINK_SPEED_25000MBPS,72 AD_LINK_SPEED_40000MBPS,73 AD_LINK_SPEED_50000MBPS,74 AD_LINK_SPEED_56000MBPS,75 AD_LINK_SPEED_100000MBPS,76 AD_LINK_SPEED_200000MBPS,77 AD_LINK_SPEED_400000MBPS,78 AD_LINK_SPEED_800000MBPS,79};80 81/* compare MAC addresses */82#define MAC_ADDRESS_EQUAL(A, B) \83 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)84 85static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;86static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;87 88const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = {89 0x01, 0x80, 0xC2, 0x00, 0x00, 0x0290};91 92/* ================= main 802.3ad protocol functions ================== */93static int ad_lacpdu_send(struct port *port);94static int ad_marker_send(struct port *port, struct bond_marker *marker);95static void ad_mux_machine(struct port *port, bool *update_slave_arr);96static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);97static void ad_tx_machine(struct port *port);98static void ad_periodic_machine(struct port *port, struct bond_params *bond_params);99static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);100static void ad_agg_selection_logic(struct aggregator *aggregator,101 bool *update_slave_arr);102static void ad_clear_agg(struct aggregator *aggregator);103static void ad_initialize_agg(struct aggregator *aggregator);104static void ad_initialize_port(struct port *port, int lacp_fast);105static void ad_enable_collecting(struct port *port);106static void ad_disable_distributing(struct port *port,107 bool *update_slave_arr);108static void ad_enable_collecting_distributing(struct port *port,109 bool *update_slave_arr);110static void ad_disable_collecting_distributing(struct port *port,111 bool *update_slave_arr);112static void ad_marker_info_received(struct bond_marker *marker_info,113 struct port *port);114static void ad_marker_response_received(struct bond_marker *marker,115 struct port *port);116static void ad_update_actor_keys(struct port *port, bool reset);117 118 119/* ================= api to bonding and kernel code ================== */120 121/**122 * __get_bond_by_port - get the port's bonding struct123 * @port: the port we're looking at124 *125 * Return @port's bonding struct, or %NULL if it can't be found.126 */127static inline struct bonding *__get_bond_by_port(struct port *port)128{129 if (port->slave == NULL)130 return NULL;131 132 return bond_get_bond_by_slave(port->slave);133}134 135/**136 * __get_first_agg - get the first aggregator in the bond137 * @port: the port we're looking at138 *139 * Return the aggregator of the first slave in @bond, or %NULL if it can't be140 * found.141 * The caller must hold RCU or RTNL lock.142 */143static inline struct aggregator *__get_first_agg(struct port *port)144{145 struct bonding *bond = __get_bond_by_port(port);146 struct slave *first_slave;147 struct aggregator *agg;148 149 /* If there's no bond for this port, or bond has no slaves */150 if (bond == NULL)151 return NULL;152 153 rcu_read_lock();154 first_slave = bond_first_slave_rcu(bond);155 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;156 rcu_read_unlock();157 158 return agg;159}160 161/**162 * __agg_has_partner - see if we have a partner163 * @agg: the agregator we're looking at164 *165 * Return nonzero if aggregator has a partner (denoted by a non-zero ether166 * address for the partner). Return 0 if not.167 */168static inline int __agg_has_partner(struct aggregator *agg)169{170 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);171}172 173/**174 * __disable_distributing_port - disable the port's slave for distributing.175 * Port will still be able to collect.176 * @port: the port we're looking at177 *178 * This will disable only distributing on the port's slave.179 */180static void __disable_distributing_port(struct port *port)181{182 bond_set_slave_tx_disabled_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);183}184 185/**186 * __enable_collecting_port - enable the port's slave for collecting,187 * if it's up188 * @port: the port we're looking at189 *190 * This will enable only collecting on the port's slave.191 */192static void __enable_collecting_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_rx_enabled_flags(slave, BOND_SLAVE_NOTIFY_LATER);198}199 200/**201 * __disable_port - disable the port's slave202 * @port: the port we're looking at203 *204 * This will disable both collecting and distributing on the port's slave.205 */206static inline void __disable_port(struct port *port)207{208 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);209}210 211/**212 * __enable_port - enable the port's slave, if it's up213 * @port: the port we're looking at214 *215 * This will enable both collecting and distributing on the port's slave.216 */217static inline void __enable_port(struct port *port)218{219 struct slave *slave = port->slave;220 221 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))222 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);223}224 225/**226 * __port_move_to_attached_state - check if port should transition back to attached227 * state.228 * @port: the port we're looking at229 */230static bool __port_move_to_attached_state(struct port *port)231{232 if (!(port->sm_vars & AD_PORT_SELECTED) ||233 (port->sm_vars & AD_PORT_STANDBY) ||234 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||235 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION))236 port->sm_mux_state = AD_MUX_ATTACHED;237 238 return port->sm_mux_state == AD_MUX_ATTACHED;239}240 241/**242 * __port_is_collecting_distributing - check if the port's slave is in the243 * combined collecting/distributing state244 * @port: the port we're looking at245 */246static int __port_is_collecting_distributing(struct port *port)247{248 return bond_is_active_slave(port->slave);249}250 251/**252 * __get_agg_selection_mode - get the aggregator selection mode253 * @port: the port we're looking at254 *255 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.256 */257static inline u32 __get_agg_selection_mode(struct port *port)258{259 struct bonding *bond = __get_bond_by_port(port);260 261 if (bond == NULL)262 return BOND_AD_STABLE;263 264 return bond->params.ad_select;265}266 267/**268 * __check_agg_selection_timer - check if the selection timer has expired269 * @port: the port we're looking at270 */271static inline int __check_agg_selection_timer(struct port *port)272{273 struct bonding *bond = __get_bond_by_port(port);274 275 if (bond == NULL)276 return 0;277 278 return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0;279}280 281/**282 * __get_link_speed - get a port's speed283 * @port: the port we're looking at284 *285 * Return @port's speed in 802.3ad enum format. i.e. one of:286 * 0,287 * %AD_LINK_SPEED_10MBPS,288 * %AD_LINK_SPEED_100MBPS,289 * %AD_LINK_SPEED_1000MBPS,290 * %AD_LINK_SPEED_2500MBPS,291 * %AD_LINK_SPEED_5000MBPS,292 * %AD_LINK_SPEED_10000MBPS293 * %AD_LINK_SPEED_14000MBPS,294 * %AD_LINK_SPEED_20000MBPS295 * %AD_LINK_SPEED_25000MBPS296 * %AD_LINK_SPEED_40000MBPS297 * %AD_LINK_SPEED_50000MBPS298 * %AD_LINK_SPEED_56000MBPS299 * %AD_LINK_SPEED_100000MBPS300 * %AD_LINK_SPEED_200000MBPS301 * %AD_LINK_SPEED_400000MBPS302 * %AD_LINK_SPEED_800000MBPS303 */304static u16 __get_link_speed(struct port *port)305{306 struct slave *slave = port->slave;307 u16 speed;308 309 /* this if covers only a special case: when the configuration starts310 * with link down, it sets the speed to 0.311 * This is done in spite of the fact that the e100 driver reports 0312 * to be compatible with MVT in the future.313 */314 if (slave->link != BOND_LINK_UP)315 speed = 0;316 else {317 switch (slave->speed) {318 case SPEED_10:319 speed = AD_LINK_SPEED_10MBPS;320 break;321 322 case SPEED_100:323 speed = AD_LINK_SPEED_100MBPS;324 break;325 326 case SPEED_1000:327 speed = AD_LINK_SPEED_1000MBPS;328 break;329 330 case SPEED_2500:331 speed = AD_LINK_SPEED_2500MBPS;332 break;333 334 case SPEED_5000:335 speed = AD_LINK_SPEED_5000MBPS;336 break;337 338 case SPEED_10000:339 speed = AD_LINK_SPEED_10000MBPS;340 break;341 342 case SPEED_14000:343 speed = AD_LINK_SPEED_14000MBPS;344 break;345 346 case SPEED_20000:347 speed = AD_LINK_SPEED_20000MBPS;348 break;349 350 case SPEED_25000:351 speed = AD_LINK_SPEED_25000MBPS;352 break;353 354 case SPEED_40000:355 speed = AD_LINK_SPEED_40000MBPS;356 break;357 358 case SPEED_50000:359 speed = AD_LINK_SPEED_50000MBPS;360 break;361 362 case SPEED_56000:363 speed = AD_LINK_SPEED_56000MBPS;364 break;365 366 case SPEED_100000:367 speed = AD_LINK_SPEED_100000MBPS;368 break;369 370 case SPEED_200000:371 speed = AD_LINK_SPEED_200000MBPS;372 break;373 374 case SPEED_400000:375 speed = AD_LINK_SPEED_400000MBPS;376 break;377 378 case SPEED_800000:379 speed = AD_LINK_SPEED_800000MBPS;380 break;381 382 default:383 /* unknown speed value from ethtool. shouldn't happen */384 if (slave->speed != SPEED_UNKNOWN)385 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",386 slave->bond->dev->name,387 slave->dev->name, slave->speed,388 port->actor_port_number);389 speed = 0;390 break;391 }392 }393 394 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n",395 port->actor_port_number, speed);396 return speed;397}398 399/**400 * __get_duplex - get a port's duplex401 * @port: the port we're looking at402 *403 * Return @port's duplex in 802.3ad bitmask format. i.e.:404 * 0x01 if in full duplex405 * 0x00 otherwise406 */407static u8 __get_duplex(struct port *port)408{409 struct slave *slave = port->slave;410 u8 retval = 0x0;411 412 /* handling a special case: when the configuration starts with413 * link down, it sets the duplex to 0.414 */415 if (slave->link == BOND_LINK_UP) {416 switch (slave->duplex) {417 case DUPLEX_FULL:418 retval = 0x1;419 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",420 port->actor_port_number);421 break;422 case DUPLEX_HALF:423 default:424 retval = 0x0;425 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n",426 port->actor_port_number);427 break;428 }429 }430 return retval;431}432 433static void __ad_actor_update_port(struct port *port)434{435 const struct bonding *bond = bond_get_bond_by_slave(port->slave);436 437 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;438 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;439}440 441/* Conversions */442 443/**444 * __ad_timer_to_ticks - convert a given timer type to AD module ticks445 * @timer_type: which timer to operate446 * @par: timer parameter. see below447 *448 * If @timer_type is %current_while_timer, @par indicates long/short timer.449 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,450 * %SLOW_PERIODIC_TIME.451 */452static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)453{454 u16 retval = 0; /* to silence the compiler */455 456 switch (timer_type) {457 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */458 if (par)459 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);460 else461 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);462 break;463 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */464 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);465 break;466 case AD_PERIODIC_TIMER: /* for periodic machine */467 retval = (par*ad_ticks_per_sec); /* long timeout */468 break;469 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */470 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);471 break;472 case AD_WAIT_WHILE_TIMER: /* for selection machine */473 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);474 break;475 }476 477 return retval;478}479 480 481/* ================= ad_rx_machine helper functions ================== */482 483/**484 * __choose_matched - update a port's matched variable from a received lacpdu485 * @lacpdu: the lacpdu we've received486 * @port: the port we're looking at487 *488 * Update the value of the matched variable, using parameter values from a489 * newly received lacpdu. Parameter values for the partner carried in the490 * received PDU are compared with the corresponding operational parameter491 * values for the actor. Matched is set to TRUE if all of these parameters492 * match and the PDU parameter partner_state.aggregation has the same value as493 * actor_oper_port_state.aggregation and lacp will actively maintain the link494 * in the aggregation. Matched is also set to TRUE if the value of495 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates496 * an individual link and lacp will actively maintain the link. Otherwise,497 * matched is set to FALSE. LACP is considered to be actively maintaining the498 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both499 * the actor's actor_oper_port_state.lacp_activity and the PDU's500 * partner_state.lacp_activity variables are TRUE.501 *502 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is503 * used here to implement the language from 802.3ad 43.4.9 that requires504 * recordPDU to "match" the LACPDU parameters to the stored values.505 */506static void __choose_matched(struct lacpdu *lacpdu, struct port *port)507{508 /* check if all parameters are alike509 * or this is individual link(aggregation == FALSE)510 * then update the state machine Matched variable.511 */512 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&513 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&514 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&515 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&516 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&517 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) ||518 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0)519 ) {520 port->sm_vars |= AD_PORT_MATCHED;521 } else {522 port->sm_vars &= ~AD_PORT_MATCHED;523 }524}525 526/**527 * __record_pdu - record parameters from a received lacpdu528 * @lacpdu: the lacpdu we've received529 * @port: the port we're looking at530 *531 * Record the parameter values for the Actor carried in a received lacpdu as532 * the current partner operational parameter values and sets533 * actor_oper_port_state.defaulted to FALSE.534 */535static void __record_pdu(struct lacpdu *lacpdu, struct port *port)536{537 if (lacpdu && port) {538 struct port_params *partner = &port->partner_oper;539 540 __choose_matched(lacpdu, port);541 /* record the new parameter values for the partner542 * operational543 */544 partner->port_number = ntohs(lacpdu->actor_port);545 partner->port_priority = ntohs(lacpdu->actor_port_priority);546 partner->system = lacpdu->actor_system;547 partner->system_priority = ntohs(lacpdu->actor_system_priority);548 partner->key = ntohs(lacpdu->actor_key);549 partner->port_state = lacpdu->actor_state;550 551 /* set actor_oper_port_state.defaulted to FALSE */552 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED;553 554 /* set the partner sync. to on if the partner is sync,555 * and the port is matched556 */557 if ((port->sm_vars & AD_PORT_MATCHED) &&558 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) {559 partner->port_state |= LACP_STATE_SYNCHRONIZATION;560 slave_dbg(port->slave->bond->dev, port->slave->dev,561 "partner sync=1\n");562 } else {563 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION;564 slave_dbg(port->slave->bond->dev, port->slave->dev,565 "partner sync=0\n");566 }567 }568}569 570/**571 * __record_default - record default parameters572 * @port: the port we're looking at573 *574 * This function records the default parameter values for the partner carried575 * in the Partner Admin parameters as the current partner operational parameter576 * values and sets actor_oper_port_state.defaulted to TRUE.577 */578static void __record_default(struct port *port)579{580 if (port) {581 /* record the partner admin parameters */582 memcpy(&port->partner_oper, &port->partner_admin,583 sizeof(struct port_params));584 585 /* set actor_oper_port_state.defaulted to true */586 port->actor_oper_port_state |= LACP_STATE_DEFAULTED;587 }588}589 590/**591 * __update_selected - update a port's Selected variable from a received lacpdu592 * @lacpdu: the lacpdu we've received593 * @port: the port we're looking at594 *595 * Update the value of the selected variable, using parameter values from a596 * newly received lacpdu. The parameter values for the Actor carried in the597 * received PDU are compared with the corresponding operational parameter598 * values for the ports partner. If one or more of the comparisons shows that599 * the value(s) received in the PDU differ from the current operational values,600 * then selected is set to FALSE and actor_oper_port_state.synchronization is601 * set to out_of_sync. Otherwise, selected remains unchanged.602 */603static void __update_selected(struct lacpdu *lacpdu, struct port *port)604{605 if (lacpdu && port) {606 const struct port_params *partner = &port->partner_oper;607 608 /* check if any parameter is different then609 * update the state machine selected variable.610 */611 if (ntohs(lacpdu->actor_port) != partner->port_number ||612 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||613 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||614 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||615 ntohs(lacpdu->actor_key) != partner->key ||616 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) {617 port->sm_vars &= ~AD_PORT_SELECTED;618 }619 }620}621 622/**623 * __update_default_selected - update a port's Selected variable from Partner624 * @port: the port we're looking at625 *626 * This function updates the value of the selected variable, using the partner627 * administrative parameter values. The administrative values are compared with628 * the corresponding operational parameter values for the partner. If one or629 * more of the comparisons shows that the administrative value(s) differ from630 * the current operational values, then Selected is set to FALSE and631 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,632 * Selected remains unchanged.633 */634static void __update_default_selected(struct port *port)635{636 if (port) {637 const struct port_params *admin = &port->partner_admin;638 const struct port_params *oper = &port->partner_oper;639 640 /* check if any parameter is different then641 * update the state machine selected variable.642 */643 if (admin->port_number != oper->port_number ||644 admin->port_priority != oper->port_priority ||645 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||646 admin->system_priority != oper->system_priority ||647 admin->key != oper->key ||648 (admin->port_state & LACP_STATE_AGGREGATION)649 != (oper->port_state & LACP_STATE_AGGREGATION)) {650 port->sm_vars &= ~AD_PORT_SELECTED;651 }652 }653}654 655/**656 * __update_ntt - update a port's ntt variable from a received lacpdu657 * @lacpdu: the lacpdu we've received658 * @port: the port we're looking at659 *660 * Updates the value of the ntt variable, using parameter values from a newly661 * received lacpdu. The parameter values for the partner carried in the662 * received PDU are compared with the corresponding operational parameter663 * values for the Actor. If one or more of the comparisons shows that the664 * value(s) received in the PDU differ from the current operational values,665 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.666 */667static void __update_ntt(struct lacpdu *lacpdu, struct port *port)668{669 /* validate lacpdu and port */670 if (lacpdu && port) {671 /* check if any parameter is different then672 * update the port->ntt.673 */674 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||675 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||676 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||677 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||678 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||679 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) ||680 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) ||681 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) ||682 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION))683 ) {684 port->ntt = true;685 }686 }687}688 689/**690 * __agg_ports_are_ready - check if all ports in an aggregator are ready691 * @aggregator: the aggregator we're looking at692 *693 */694static int __agg_ports_are_ready(struct aggregator *aggregator)695{696 struct port *port;697 int retval = 1;698 699 if (aggregator) {700 /* scan all ports in this aggregator to verfy if they are701 * all ready.702 */703 for (port = aggregator->lag_ports;704 port;705 port = port->next_port_in_aggregator) {706 if (!(port->sm_vars & AD_PORT_READY_N)) {707 retval = 0;708 break;709 }710 }711 }712 713 return retval;714}715 716/**717 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator718 * @aggregator: the aggregator we're looking at719 * @val: Should the ports' ready bit be set on or off720 *721 */722static void __set_agg_ports_ready(struct aggregator *aggregator, int val)723{724 struct port *port;725 726 for (port = aggregator->lag_ports; port;727 port = port->next_port_in_aggregator) {728 if (val)729 port->sm_vars |= AD_PORT_READY;730 else731 port->sm_vars &= ~AD_PORT_READY;732 }733}734 735static int __agg_active_ports(struct aggregator *agg)736{737 struct port *port;738 int active = 0;739 740 for (port = agg->lag_ports; port;741 port = port->next_port_in_aggregator) {742 if (port->is_enabled)743 active++;744 }745 746 return active;747}748 749/**750 * __get_agg_bandwidth - get the total bandwidth of an aggregator751 * @aggregator: the aggregator we're looking at752 *753 */754static u32 __get_agg_bandwidth(struct aggregator *aggregator)755{756 int nports = __agg_active_ports(aggregator);757 u32 bandwidth = 0;758 759 if (nports) {760 switch (__get_link_speed(aggregator->lag_ports)) {761 case AD_LINK_SPEED_1MBPS:762 bandwidth = nports;763 break;764 case AD_LINK_SPEED_10MBPS:765 bandwidth = nports * 10;766 break;767 case AD_LINK_SPEED_100MBPS:768 bandwidth = nports * 100;769 break;770 case AD_LINK_SPEED_1000MBPS:771 bandwidth = nports * 1000;772 break;773 case AD_LINK_SPEED_2500MBPS:774 bandwidth = nports * 2500;775 break;776 case AD_LINK_SPEED_5000MBPS:777 bandwidth = nports * 5000;778 break;779 case AD_LINK_SPEED_10000MBPS:780 bandwidth = nports * 10000;781 break;782 case AD_LINK_SPEED_14000MBPS:783 bandwidth = nports * 14000;784 break;785 case AD_LINK_SPEED_20000MBPS:786 bandwidth = nports * 20000;787 break;788 case AD_LINK_SPEED_25000MBPS:789 bandwidth = nports * 25000;790 break;791 case AD_LINK_SPEED_40000MBPS:792 bandwidth = nports * 40000;793 break;794 case AD_LINK_SPEED_50000MBPS:795 bandwidth = nports * 50000;796 break;797 case AD_LINK_SPEED_56000MBPS:798 bandwidth = nports * 56000;799 break;800 case AD_LINK_SPEED_100000MBPS:801 bandwidth = nports * 100000;802 break;803 case AD_LINK_SPEED_200000MBPS:804 bandwidth = nports * 200000;805 break;806 case AD_LINK_SPEED_400000MBPS:807 bandwidth = nports * 400000;808 break;809 case AD_LINK_SPEED_800000MBPS:810 bandwidth = nports * 800000;811 break;812 default:813 bandwidth = 0; /* to silence the compiler */814 }815 }816 return bandwidth;817}818 819/**820 * __get_active_agg - get the current active aggregator821 * @aggregator: the aggregator we're looking at822 *823 * Caller must hold RCU lock.824 */825static struct aggregator *__get_active_agg(struct aggregator *aggregator)826{827 struct bonding *bond = aggregator->slave->bond;828 struct list_head *iter;829 struct slave *slave;830 831 bond_for_each_slave_rcu(bond, slave, iter)832 if (SLAVE_AD_INFO(slave)->aggregator.is_active)833 return &(SLAVE_AD_INFO(slave)->aggregator);834 835 return NULL;836}837 838/**839 * __update_lacpdu_from_port - update a port's lacpdu fields840 * @port: the port we're looking at841 */842static inline void __update_lacpdu_from_port(struct port *port)843{844 struct lacpdu *lacpdu = &port->lacpdu;845 const struct port_params *partner = &port->partner_oper;846 847 /* update current actual Actor parameters848 * lacpdu->subtype initialized849 * lacpdu->version_number initialized850 * lacpdu->tlv_type_actor_info initialized851 * lacpdu->actor_information_length initialized852 */853 854 lacpdu->actor_system_priority = htons(port->actor_system_priority);855 lacpdu->actor_system = port->actor_system;856 lacpdu->actor_key = htons(port->actor_oper_port_key);857 lacpdu->actor_port_priority = htons(port->actor_port_priority);858 lacpdu->actor_port = htons(port->actor_port_number);859 lacpdu->actor_state = port->actor_oper_port_state;860 slave_dbg(port->slave->bond->dev, port->slave->dev,861 "update lacpdu: actor port state %x\n",862 port->actor_oper_port_state);863 864 /* lacpdu->reserved_3_1 initialized865 * lacpdu->tlv_type_partner_info initialized866 * lacpdu->partner_information_length initialized867 */868 869 lacpdu->partner_system_priority = htons(partner->system_priority);870 lacpdu->partner_system = partner->system;871 lacpdu->partner_key = htons(partner->key);872 lacpdu->partner_port_priority = htons(partner->port_priority);873 lacpdu->partner_port = htons(partner->port_number);874 lacpdu->partner_state = partner->port_state;875 876 /* lacpdu->reserved_3_2 initialized877 * lacpdu->tlv_type_collector_info initialized878 * lacpdu->collector_information_length initialized879 * collector_max_delay initialized880 * reserved_12[12] initialized881 * tlv_type_terminator initialized882 * terminator_length initialized883 * reserved_50[50] initialized884 */885}886 887/* ================= main 802.3ad protocol code ========================= */888 889/**890 * ad_lacpdu_send - send out a lacpdu packet on a given port891 * @port: the port we're looking at892 *893 * Returns: 0 on success894 * < 0 on error895 */896static int ad_lacpdu_send(struct port *port)897{898 struct slave *slave = port->slave;899 struct sk_buff *skb;900 struct lacpdu_header *lacpdu_header;901 int length = sizeof(struct lacpdu_header);902 903 skb = dev_alloc_skb(length);904 if (!skb)905 return -ENOMEM;906 907 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);908 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);909 910 skb->dev = slave->dev;911 skb_reset_mac_header(skb);912 skb->network_header = skb->mac_header + ETH_HLEN;913 skb->protocol = PKT_TYPE_LACPDU;914 skb->priority = TC_PRIO_CONTROL;915 916 lacpdu_header = skb_put(skb, length);917 918 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);919 /* Note: source address is set to be the member's PERMANENT address,920 * because we use it to identify loopback lacpdus in receive.921 */922 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);923 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;924 925 lacpdu_header->lacpdu = port->lacpdu;926 927 dev_queue_xmit(skb);928 929 return 0;930}931 932/**933 * ad_marker_send - send marker information/response on a given port934 * @port: the port we're looking at935 * @marker: marker data to send936 *937 * Returns: 0 on success938 * < 0 on error939 */940static int ad_marker_send(struct port *port, struct bond_marker *marker)941{942 struct slave *slave = port->slave;943 struct sk_buff *skb;944 struct bond_marker_header *marker_header;945 int length = sizeof(struct bond_marker_header);946 947 skb = dev_alloc_skb(length + 16);948 if (!skb)949 return -ENOMEM;950 951 switch (marker->tlv_type) {952 case AD_MARKER_INFORMATION_SUBTYPE:953 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);954 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);955 break;956 case AD_MARKER_RESPONSE_SUBTYPE:957 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);958 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);959 break;960 }961 962 skb_reserve(skb, 16);963 964 skb->dev = slave->dev;965 skb_reset_mac_header(skb);966 skb->network_header = skb->mac_header + ETH_HLEN;967 skb->protocol = PKT_TYPE_LACPDU;968 969 marker_header = skb_put(skb, length);970 971 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);972 /* Note: source address is set to be the member's PERMANENT address,973 * because we use it to identify loopback MARKERs in receive.974 */975 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);976 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;977 978 marker_header->marker = *marker;979 980 dev_queue_xmit(skb);981 982 return 0;983}984 985/**986 * ad_mux_machine - handle a port's mux state machine987 * @port: the port we're looking at988 * @update_slave_arr: Does slave array need update?989 */990static void ad_mux_machine(struct port *port, bool *update_slave_arr)991{992 struct bonding *bond = __get_bond_by_port(port);993 mux_states_t last_state;994 995 /* keep current State Machine state to compare later if it was996 * changed997 */998 last_state = port->sm_mux_state;999 1000 if (port->sm_vars & AD_PORT_BEGIN) {1001 port->sm_mux_state = AD_MUX_DETACHED;1002 } else {1003 switch (port->sm_mux_state) {1004 case AD_MUX_DETACHED:1005 if ((port->sm_vars & AD_PORT_SELECTED)1006 || (port->sm_vars & AD_PORT_STANDBY))1007 /* if SELECTED or STANDBY */1008 port->sm_mux_state = AD_MUX_WAITING;1009 break;1010 case AD_MUX_WAITING:1011 /* if SELECTED == FALSE return to DETACH state */1012 if (!(port->sm_vars & AD_PORT_SELECTED)) {1013 port->sm_vars &= ~AD_PORT_READY_N;1014 /* in order to withhold the Selection Logic to1015 * check all ports READY_N value every callback1016 * cycle to update ready variable, we check1017 * READY_N and update READY here1018 */1019 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));1020 port->sm_mux_state = AD_MUX_DETACHED;1021 break;1022 }1023 1024 /* check if the wait_while_timer expired */1025 if (port->sm_mux_timer_counter1026 && !(--port->sm_mux_timer_counter))1027 port->sm_vars |= AD_PORT_READY_N;1028 1029 /* in order to withhold the selection logic to check1030 * all ports READY_N value every callback cycle to1031 * update ready variable, we check READY_N and update1032 * READY here1033 */1034 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));1035 1036 /* if the wait_while_timer expired, and the port is1037 * in READY state, move to ATTACHED state1038 */1039 if ((port->sm_vars & AD_PORT_READY)1040 && !port->sm_mux_timer_counter)1041 port->sm_mux_state = AD_MUX_ATTACHED;1042 break;1043 case AD_MUX_ATTACHED:1044 /* check also if agg_select_timer expired (so the1045 * edable port will take place only after this timer)1046 */1047 if ((port->sm_vars & AD_PORT_SELECTED) &&1048 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&1049 !__check_agg_selection_timer(port)) {1050 if (port->aggregator->is_active) {1051 int state = AD_MUX_COLLECTING_DISTRIBUTING;1052 1053 if (!bond->params.coupled_control)1054 state = AD_MUX_COLLECTING;1055 port->sm_mux_state = state;1056 }1057 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||1058 (port->sm_vars & AD_PORT_STANDBY)) {1059 /* if UNSELECTED or STANDBY */1060 port->sm_vars &= ~AD_PORT_READY_N;1061 /* in order to withhold the selection logic to1062 * check all ports READY_N value every callback1063 * cycle to update ready variable, we check1064 * READY_N and update READY here1065 */1066 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));1067 port->sm_mux_state = AD_MUX_DETACHED;1068 } else if (port->aggregator->is_active) {1069 port->actor_oper_port_state |=1070 LACP_STATE_SYNCHRONIZATION;1071 }1072 break;1073 case AD_MUX_COLLECTING_DISTRIBUTING:1074 if (!__port_move_to_attached_state(port)) {1075 /* if port state hasn't changed make1076 * sure that a collecting distributing1077 * port in an active aggregator is enabled1078 */1079 if (port->aggregator->is_active &&1080 !__port_is_collecting_distributing(port)) {1081 __enable_port(port);1082 *update_slave_arr = true;1083 }1084 }1085 break;1086 case AD_MUX_COLLECTING:1087 if (!__port_move_to_attached_state(port)) {1088 if ((port->sm_vars & AD_PORT_SELECTED) &&1089 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&1090 (port->partner_oper.port_state & LACP_STATE_COLLECTING)) {1091 port->sm_mux_state = AD_MUX_DISTRIBUTING;1092 } else {1093 /* If port state hasn't changed, make sure that a collecting1094 * port is enabled for an active aggregator.1095 */1096 struct slave *slave = port->slave;1097 1098 if (port->aggregator->is_active &&1099 bond_is_slave_rx_disabled(slave)) {1100 ad_enable_collecting(port);1101 *update_slave_arr = true;1102 }1103 }1104 }1105 break;1106 case AD_MUX_DISTRIBUTING:1107 if (!(port->sm_vars & AD_PORT_SELECTED) ||1108 (port->sm_vars & AD_PORT_STANDBY) ||1109 !(port->partner_oper.port_state & LACP_STATE_COLLECTING) ||1110 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||1111 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) {1112 port->sm_mux_state = AD_MUX_COLLECTING;1113 } else {1114 /* if port state hasn't changed make1115 * sure that a collecting distributing1116 * port in an active aggregator is enabled1117 */1118 if (port->aggregator &&1119 port->aggregator->is_active &&1120 !__port_is_collecting_distributing(port)) {1121 __enable_port(port);1122 *update_slave_arr = true;1123 }1124 }1125 break;1126 default:1127 break;1128 }1129 }1130 1131 /* check if the state machine was changed */1132 if (port->sm_mux_state != last_state) {1133 slave_dbg(port->slave->bond->dev, port->slave->dev,1134 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",1135 port->actor_port_number,1136 last_state,1137 port->sm_mux_state);1138 switch (port->sm_mux_state) {1139 case AD_MUX_DETACHED:1140 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;1141 ad_disable_collecting_distributing(port,1142 update_slave_arr);1143 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;1144 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;1145 port->ntt = true;1146 break;1147 case AD_MUX_WAITING:1148 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);1149 break;1150 case AD_MUX_ATTACHED:1151 if (port->aggregator->is_active)1152 port->actor_oper_port_state |=1153 LACP_STATE_SYNCHRONIZATION;1154 else1155 port->actor_oper_port_state &=1156 ~LACP_STATE_SYNCHRONIZATION;1157 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;1158 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;1159 ad_disable_collecting_distributing(port,1160 update_slave_arr);1161 port->ntt = true;1162 break;1163 case AD_MUX_COLLECTING_DISTRIBUTING:1164 port->actor_oper_port_state |= LACP_STATE_COLLECTING;1165 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;1166 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;1167 ad_enable_collecting_distributing(port,1168 update_slave_arr);1169 port->ntt = true;1170 break;1171 case AD_MUX_COLLECTING:1172 port->actor_oper_port_state |= LACP_STATE_COLLECTING;1173 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;1174 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;1175 ad_enable_collecting(port);1176 ad_disable_distributing(port, update_slave_arr);1177 port->ntt = true;1178 break;1179 case AD_MUX_DISTRIBUTING:1180 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;1181 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;1182 ad_enable_collecting_distributing(port,1183 update_slave_arr);1184 break;1185 default:1186 break;1187 }1188 }1189}1190 1191/**1192 * ad_rx_machine - handle a port's rx State Machine1193 * @lacpdu: the lacpdu we've received1194 * @port: the port we're looking at1195 *1196 * If lacpdu arrived, stop previous timer (if exists) and set the next state as1197 * CURRENT. If timer expired set the state machine in the proper state.1198 * In other cases, this function checks if we need to switch to other state.1199 */1200static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)1201{1202 rx_states_t last_state;1203 1204 /* keep current State Machine state to compare later if it was1205 * changed1206 */1207 last_state = port->sm_rx_state;1208 1209 if (lacpdu) {1210 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx);1211 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx);1212 }1213 /* check if state machine should change state */1214 1215 /* first, check if port was reinitialized */1216 if (port->sm_vars & AD_PORT_BEGIN) {1217 port->sm_rx_state = AD_RX_INITIALIZE;1218 port->sm_vars |= AD_PORT_CHURNED;1219 /* check if port is not enabled */1220 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)1221 port->sm_rx_state = AD_RX_PORT_DISABLED;1222 /* check if new lacpdu arrived */1223 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||1224 (port->sm_rx_state == AD_RX_DEFAULTED) ||1225 (port->sm_rx_state == AD_RX_CURRENT))) {1226 if (port->sm_rx_state != AD_RX_CURRENT)1227 port->sm_vars |= AD_PORT_CHURNED;1228 port->sm_rx_timer_counter = 0;1229 port->sm_rx_state = AD_RX_CURRENT;1230 } else {1231 /* if timer is on, and if it is expired */1232 if (port->sm_rx_timer_counter &&1233 !(--port->sm_rx_timer_counter)) {1234 switch (port->sm_rx_state) {1235 case AD_RX_EXPIRED:1236 port->sm_rx_state = AD_RX_DEFAULTED;1237 break;1238 case AD_RX_CURRENT:1239 port->sm_rx_state = AD_RX_EXPIRED;1240 break;1241 default:1242 break;1243 }1244 } else {1245 /* if no lacpdu arrived and no timer is on */1246 switch (port->sm_rx_state) {1247 case AD_RX_PORT_DISABLED:1248 if (port->is_enabled &&1249 (port->sm_vars & AD_PORT_LACP_ENABLED))1250 port->sm_rx_state = AD_RX_EXPIRED;1251 else if (port->is_enabled1252 && ((port->sm_vars1253 & AD_PORT_LACP_ENABLED) == 0))1254 port->sm_rx_state = AD_RX_LACP_DISABLED;1255 break;1256 default:1257 break;1258 1259 }1260 }1261 }1262 1263 /* check if the State machine was changed or new lacpdu arrived */1264 if ((port->sm_rx_state != last_state) || (lacpdu)) {1265 slave_dbg(port->slave->bond->dev, port->slave->dev,1266 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",1267 port->actor_port_number,1268 last_state,1269 port->sm_rx_state);1270 switch (port->sm_rx_state) {1271 case AD_RX_INITIALIZE:1272 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))1273 port->sm_vars &= ~AD_PORT_LACP_ENABLED;1274 else1275 port->sm_vars |= AD_PORT_LACP_ENABLED;1276 port->sm_vars &= ~AD_PORT_SELECTED;1277 __record_default(port);1278 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;1279 port->sm_rx_state = AD_RX_PORT_DISABLED;1280 1281 fallthrough;1282 case AD_RX_PORT_DISABLED:1283 port->sm_vars &= ~AD_PORT_MATCHED;1284 break;1285 case AD_RX_LACP_DISABLED:1286 port->sm_vars &= ~AD_PORT_SELECTED;1287 __record_default(port);1288 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION;1289 port->sm_vars |= AD_PORT_MATCHED;1290 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;1291 break;1292 case AD_RX_EXPIRED:1293 /* Reset of the Synchronization flag (Standard 43.4.12)1294 * This reset cause to disable this port in the1295 * COLLECTING_DISTRIBUTING state of the mux machine in1296 * case of EXPIRED even if LINK_DOWN didn't arrive for1297 * the port.1298 */1299 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION;1300 port->sm_vars &= ~AD_PORT_MATCHED;1301 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT;1302 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY;1303 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));1304 port->actor_oper_port_state |= LACP_STATE_EXPIRED;1305 port->sm_vars |= AD_PORT_CHURNED;1306 break;1307 case AD_RX_DEFAULTED:1308 __update_default_selected(port);1309 __record_default(port);1310 port->sm_vars |= AD_PORT_MATCHED;1311 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;1312 break;1313 case AD_RX_CURRENT:1314 /* detect loopback situation */1315 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),1316 &(port->actor_system))) {1317 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n"1318 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n");1319 return;1320 }1321 __update_selected(lacpdu, port);1322 __update_ntt(lacpdu, port);1323 __record_pdu(lacpdu, port);1324 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT));1325 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;1326 break;1327 default:1328 break;1329 }1330 }1331}1332 1333/**1334 * ad_churn_machine - handle port churn's state machine1335 * @port: the port we're looking at1336 *1337 */1338static void ad_churn_machine(struct port *port)1339{1340 if (port->sm_vars & AD_PORT_CHURNED) {1341 port->sm_vars &= ~AD_PORT_CHURNED;1342 port->sm_churn_actor_state = AD_CHURN_MONITOR;1343 port->sm_churn_partner_state = AD_CHURN_MONITOR;1344 port->sm_churn_actor_timer_counter =1345 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);1346 port->sm_churn_partner_timer_counter =1347 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);1348 return;1349 }1350 if (port->sm_churn_actor_timer_counter &&1351 !(--port->sm_churn_actor_timer_counter) &&1352 port->sm_churn_actor_state == AD_CHURN_MONITOR) {1353 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) {1354 port->sm_churn_actor_state = AD_NO_CHURN;1355 } else {1356 port->churn_actor_count++;1357 port->sm_churn_actor_state = AD_CHURN;1358 }1359 }1360 if (port->sm_churn_partner_timer_counter &&1361 !(--port->sm_churn_partner_timer_counter) &&1362 port->sm_churn_partner_state == AD_CHURN_MONITOR) {1363 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) {1364 port->sm_churn_partner_state = AD_NO_CHURN;1365 } else {1366 port->churn_partner_count++;1367 port->sm_churn_partner_state = AD_CHURN;1368 }1369 }1370}1371 1372/**1373 * ad_tx_machine - handle a port's tx state machine1374 * @port: the port we're looking at1375 */1376static void ad_tx_machine(struct port *port)1377{1378 /* check if tx timer expired, to verify that we do not send more than1379 * 3 packets per second1380 */1381 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {1382 /* check if there is something to send */1383 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {1384 __update_lacpdu_from_port(port);1385 1386 if (ad_lacpdu_send(port) >= 0) {1387 slave_dbg(port->slave->bond->dev,1388 port->slave->dev,1389 "Sent LACPDU on port %d\n",1390 port->actor_port_number);1391 1392 /* mark ntt as false, so it will not be sent1393 * again until demanded1394 */1395 port->ntt = false;1396 }1397 }1398 /* restart tx timer(to verify that we will not exceed1399 * AD_MAX_TX_IN_SECOND1400 */1401 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;1402 }1403}1404 1405/**1406 * ad_periodic_machine - handle a port's periodic state machine1407 * @port: the port we're looking at1408 * @bond_params: bond parameters we will use1409 *1410 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.1411 */1412static void ad_periodic_machine(struct port *port, struct bond_params *bond_params)1413{1414 periodic_states_t last_state;1415 1416 /* keep current state machine state to compare later if it was changed */1417 last_state = port->sm_periodic_state;1418 1419 /* check if port was reinitialized */1420 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||1421 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) ||1422 !bond_params->lacp_active) {1423 port->sm_periodic_state = AD_NO_PERIODIC;1424 }1425 /* check if state machine should change state */1426 else if (port->sm_periodic_timer_counter) {1427 /* check if periodic state machine expired */1428 if (!(--port->sm_periodic_timer_counter)) {1429 /* if expired then do tx */1430 port->sm_periodic_state = AD_PERIODIC_TX;1431 } else {1432 /* If not expired, check if there is some new timeout1433 * parameter from the partner state1434 */1435 switch (port->sm_periodic_state) {1436 case AD_FAST_PERIODIC:1437 if (!(port->partner_oper.port_state1438 & LACP_STATE_LACP_TIMEOUT))1439 port->sm_periodic_state = AD_SLOW_PERIODIC;1440 break;1441 case AD_SLOW_PERIODIC:1442 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) {1443 port->sm_periodic_timer_counter = 0;1444 port->sm_periodic_state = AD_PERIODIC_TX;1445 }1446 break;1447 default:1448 break;1449 }1450 }1451 } else {1452 switch (port->sm_periodic_state) {1453 case AD_NO_PERIODIC:1454 port->sm_periodic_state = AD_FAST_PERIODIC;1455 break;1456 case AD_PERIODIC_TX:1457 if (!(port->partner_oper.port_state &1458 LACP_STATE_LACP_TIMEOUT))1459 port->sm_periodic_state = AD_SLOW_PERIODIC;1460 else1461 port->sm_periodic_state = AD_FAST_PERIODIC;1462 break;1463 default:1464 break;1465 }1466 }1467 1468 /* check if the state machine was changed */1469 if (port->sm_periodic_state != last_state) {1470 slave_dbg(port->slave->bond->dev, port->slave->dev,1471 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",1472 port->actor_port_number, last_state,1473 port->sm_periodic_state);1474 switch (port->sm_periodic_state) {1475 case AD_NO_PERIODIC:1476 port->sm_periodic_timer_counter = 0;1477 break;1478 case AD_FAST_PERIODIC:1479 /* decrement 1 tick we lost in the PERIODIC_TX cycle */1480 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;1481 break;1482 case AD_SLOW_PERIODIC:1483 /* decrement 1 tick we lost in the PERIODIC_TX cycle */1484 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;1485 break;1486 case AD_PERIODIC_TX:1487 port->ntt = true;1488 break;1489 default:1490 break;1491 }1492 }1493}1494 1495/**1496 * ad_port_selection_logic - select aggregation groups1497 * @port: the port we're looking at1498 * @update_slave_arr: Does slave array need update?1499 *1500 * Select aggregation groups, and assign each port for it's aggregetor. The1501 * selection logic is called in the inititalization (after all the handshkes),1502 * and after every lacpdu receive (if selected is off).1503 */1504static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)1505{1506 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;1507 struct port *last_port = NULL, *curr_port;1508 struct list_head *iter;1509 struct bonding *bond;1510 struct slave *slave;1511 int found = 0;1512 1513 /* if the port is already Selected, do nothing */1514 if (port->sm_vars & AD_PORT_SELECTED)1515 return;1516 1517 bond = __get_bond_by_port(port);1518 1519 /* if the port is connected to other aggregator, detach it */1520 if (port->aggregator) {1521 /* detach the port from its former aggregator */1522 temp_aggregator = port->aggregator;1523 for (curr_port = temp_aggregator->lag_ports; curr_port;1524 last_port = curr_port,1525 curr_port = curr_port->next_port_in_aggregator) {1526 if (curr_port == port) {1527 temp_aggregator->num_of_ports--;1528 /* if it is the first port attached to the1529 * aggregator1530 */1531 if (!last_port) {1532 temp_aggregator->lag_ports =1533 port->next_port_in_aggregator;1534 } else {1535 /* not the first port attached to the1536 * aggregator1537 */1538 last_port->next_port_in_aggregator =1539 port->next_port_in_aggregator;1540 }1541 1542 /* clear the port's relations to this1543 * aggregator1544 */1545 port->aggregator = NULL;1546 port->next_port_in_aggregator = NULL;1547 port->actor_port_aggregator_identifier = 0;1548 1549 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n",1550 port->actor_port_number,1551 temp_aggregator->aggregator_identifier);1552 /* if the aggregator is empty, clear its1553 * parameters, and set it ready to be attached1554 */1555 if (!temp_aggregator->lag_ports)1556 ad_clear_agg(temp_aggregator);1557 break;1558 }1559 }1560 if (!curr_port) {1561 /* meaning: the port was related to an aggregator1562 * but was not on the aggregator port list1563 */1564 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n",1565 port->slave->bond->dev->name,1566 port->slave->dev->name,1567 port->actor_port_number,1568 port->aggregator->aggregator_identifier);1569 }1570 }1571 /* search on all aggregators for a suitable aggregator for this port */1572 bond_for_each_slave(bond, slave, iter) {1573 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);1574 1575 /* keep a free aggregator for later use(if needed) */1576 if (!aggregator->lag_ports) {1577 if (!free_aggregator)1578 free_aggregator = aggregator;1579 continue;1580 }1581 /* check if current aggregator suits us */1582 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */1583 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&1584 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&1585 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)1586 ) &&1587 ((__agg_has_partner(aggregator) && /* partner answers */1588 !aggregator->is_individual) /* but is not individual OR */1589 )1590 ) {1591 /* attach to the founded aggregator */1592 port->aggregator = aggregator;1593 port->actor_port_aggregator_identifier =1594 port->aggregator->aggregator_identifier;1595 port->next_port_in_aggregator = aggregator->lag_ports;1596 port->aggregator->num_of_ports++;1597 aggregator->lag_ports = port;1598 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n",1599 port->actor_port_number,1600 port->aggregator->aggregator_identifier);1601 1602 /* mark this port as selected */1603 port->sm_vars |= AD_PORT_SELECTED;1604 found = 1;1605 break;1606 }1607 }1608 1609 /* the port couldn't find an aggregator - attach it to a new1610 * aggregator1611 */1612 if (!found) {1613 if (free_aggregator) {1614 /* assign port a new aggregator */1615 port->aggregator = free_aggregator;1616 port->actor_port_aggregator_identifier =1617 port->aggregator->aggregator_identifier;1618 1619 /* update the new aggregator's parameters1620 * if port was responsed from the end-user1621 */1622 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)1623 /* if port is full duplex */1624 port->aggregator->is_individual = false;1625 else1626 port->aggregator->is_individual = true;1627 1628 port->aggregator->actor_admin_aggregator_key =1629 port->actor_admin_port_key;1630 port->aggregator->actor_oper_aggregator_key =1631 port->actor_oper_port_key;1632 port->aggregator->partner_system =1633 port->partner_oper.system;1634 port->aggregator->partner_system_priority =1635 port->partner_oper.system_priority;1636 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;1637 port->aggregator->receive_state = 1;1638 port->aggregator->transmit_state = 1;1639 port->aggregator->lag_ports = port;1640 port->aggregator->num_of_ports++;1641 1642 /* mark this port as selected */1643 port->sm_vars |= AD_PORT_SELECTED;1644 1645 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n",1646 port->actor_port_number,1647 port->aggregator->aggregator_identifier);1648 } else {1649 slave_err(bond->dev, port->slave->dev,1650 "Port %d did not find a suitable aggregator\n",1651 port->actor_port_number);1652 return;1653 }1654 }1655 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE1656 * in all aggregator's ports, else set ready=FALSE in all1657 * aggregator's ports1658 */1659 __set_agg_ports_ready(port->aggregator,1660 __agg_ports_are_ready(port->aggregator));1661 1662 aggregator = __get_first_agg(port);1663 ad_agg_selection_logic(aggregator, update_slave_arr);1664 1665 if (!port->aggregator->is_active)1666 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;1667}1668 1669/* Decide if "agg" is a better choice for the new active aggregator that1670 * the current best, according to the ad_select policy.1671 */1672static struct aggregator *ad_agg_selection_test(struct aggregator *best,1673 struct aggregator *curr)1674{1675 /* 0. If no best, select current.1676 *1677 * 1. If the current agg is not individual, and the best is1678 * individual, select current.1679 *1680 * 2. If current agg is individual and the best is not, keep best.1681 *1682 * 3. Therefore, current and best are both individual or both not1683 * individual, so:1684 *1685 * 3a. If current agg partner replied, and best agg partner did not,1686 * select current.1687 *1688 * 3b. If current agg partner did not reply and best agg partner1689 * did reply, keep best.1690 *1691 * 4. Therefore, current and best both have partner replies or1692 * both do not, so perform selection policy:1693 *1694 * BOND_AD_COUNT: Select by count of ports. If count is equal,1695 * select by bandwidth.1696 *1697 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.1698 */1699 if (!best)1700 return curr;1701 1702 if (!curr->is_individual && best->is_individual)1703 return curr;1704 1705 if (curr->is_individual && !best->is_individual)1706 return best;1707 1708 if (__agg_has_partner(curr) && !__agg_has_partner(best))1709 return curr;1710 1711 if (!__agg_has_partner(curr) && __agg_has_partner(best))1712 return best;1713 1714 switch (__get_agg_selection_mode(curr->lag_ports)) {1715 case BOND_AD_COUNT:1716 if (__agg_active_ports(curr) > __agg_active_ports(best))1717 return curr;1718 1719 if (__agg_active_ports(curr) < __agg_active_ports(best))1720 return best;1721 1722 fallthrough;1723 case BOND_AD_STABLE:1724 case BOND_AD_BANDWIDTH:1725 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))1726 return curr;1727 1728 break;1729 1730 default:1731 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n",1732 curr->slave->bond->dev->name,1733 curr->slave->dev->name,1734 __get_agg_selection_mode(curr->lag_ports));1735 break;1736 }1737 1738 return best;1739}1740 1741static int agg_device_up(const struct aggregator *agg)1742{1743 struct port *port = agg->lag_ports;1744 1745 if (!port)1746 return 0;1747 1748 for (port = agg->lag_ports; port;1749 port = port->next_port_in_aggregator) {1750 if (netif_running(port->slave->dev) &&1751 netif_carrier_ok(port->slave->dev))1752 return 1;1753 }1754 1755 return 0;1756}1757 1758/**1759 * ad_agg_selection_logic - select an aggregation group for a team1760 * @agg: the aggregator we're looking at1761 * @update_slave_arr: Does slave array need update?1762 *1763 * It is assumed that only one aggregator may be selected for a team.1764 *1765 * The logic of this function is to select the aggregator according to1766 * the ad_select policy:1767 *1768 * BOND_AD_STABLE: select the aggregator with the most ports attached to1769 * it, and to reselect the active aggregator only if the previous1770 * aggregator has no more ports related to it.1771 *1772 * BOND_AD_BANDWIDTH: select the aggregator with the highest total1773 * bandwidth, and reselect whenever a link state change takes place or the1774 * set of slaves in the bond changes.1775 *1776 * BOND_AD_COUNT: select the aggregator with largest number of ports1777 * (slaves), and reselect whenever a link state change takes place or the1778 * set of slaves in the bond changes.1779 *1780 * FIXME: this function MUST be called with the first agg in the bond, or1781 * __get_active_agg() won't work correctly. This function should be better1782 * called with the bond itself, and retrieve the first agg from it.1783 */1784static void ad_agg_selection_logic(struct aggregator *agg,1785 bool *update_slave_arr)1786{1787 struct aggregator *best, *active, *origin;1788 struct bonding *bond = agg->slave->bond;1789 struct list_head *iter;1790 struct slave *slave;1791 struct port *port;1792 1793 rcu_read_lock();1794 origin = agg;1795 active = __get_active_agg(agg);1796 best = (active && agg_device_up(active)) ? active : NULL;1797 1798 bond_for_each_slave_rcu(bond, slave, iter) {1799 agg = &(SLAVE_AD_INFO(slave)->aggregator);1800 1801 agg->is_active = 0;1802 1803 if (__agg_active_ports(agg) && agg_device_up(agg))1804 best = ad_agg_selection_test(best, agg);1805 }1806 1807 if (best &&1808 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {1809 /* For the STABLE policy, don't replace the old active1810 * aggregator if it's still active (it has an answering1811 * partner) or if both the best and active don't have an1812 * answering partner.1813 */1814 if (active && active->lag_ports &&1815 __agg_active_ports(active) &&1816 (__agg_has_partner(active) ||1817 (!__agg_has_partner(active) &&1818 !__agg_has_partner(best)))) {1819 if (!(!active->actor_oper_aggregator_key &&1820 best->actor_oper_aggregator_key)) {1821 best = NULL;1822 active->is_active = 1;1823 }1824 }1825 }1826 1827 if (best && (best == active)) {1828 best = NULL;1829 active->is_active = 1;1830 }1831 1832 /* if there is new best aggregator, activate it */1833 if (best) {1834 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",1835 best->slave ? best->slave->dev->name : "NULL",1836 best->aggregator_identifier, best->num_of_ports,1837 best->actor_oper_aggregator_key,1838 best->partner_oper_aggregator_key,1839 best->is_individual, best->is_active);1840 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n",1841 best->slave ? best->slave->dev->name : "NULL",1842 best->lag_ports, best->slave);1843 1844 bond_for_each_slave_rcu(bond, slave, iter) {1845 agg = &(SLAVE_AD_INFO(slave)->aggregator);1846 1847 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",1848 agg->aggregator_identifier, agg->num_of_ports,1849 agg->actor_oper_aggregator_key,1850 agg->partner_oper_aggregator_key,1851 agg->is_individual, agg->is_active);1852 }1853 1854 /* check if any partner replies */1855 if (best->is_individual)1856 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",1857 bond->dev->name);1858 1859 best->is_active = 1;1860 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n",1861 best->slave ? best->slave->dev->name : "NULL",1862 best->aggregator_identifier);1863 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",1864 best->slave ? best->slave->dev->name : "NULL",1865 best->aggregator_identifier, best->num_of_ports,1866 best->actor_oper_aggregator_key,1867 best->partner_oper_aggregator_key,1868 best->is_individual, best->is_active);1869 1870 /* disable the ports that were related to the former1871 * active_aggregator1872 */1873 if (active) {1874 for (port = active->lag_ports; port;1875 port = port->next_port_in_aggregator) {1876 __disable_port(port);1877 }1878 }1879 /* Slave array needs update. */1880 *update_slave_arr = true;1881 }1882 1883 /* if the selected aggregator is of join individuals1884 * (partner_system is NULL), enable their ports1885 */1886 active = __get_active_agg(origin);1887 1888 if (active) {1889 if (!__agg_has_partner(active)) {1890 for (port = active->lag_ports; port;1891 port = port->next_port_in_aggregator) {1892 __enable_port(port);1893 }1894 *update_slave_arr = true;1895 }1896 }1897 1898 rcu_read_unlock();1899 1900 bond_3ad_set_carrier(bond);1901}1902 1903/**1904 * ad_clear_agg - clear a given aggregator's parameters1905 * @aggregator: the aggregator we're looking at1906 */1907static void ad_clear_agg(struct aggregator *aggregator)1908{1909 if (aggregator) {1910 aggregator->is_individual = false;1911 aggregator->actor_admin_aggregator_key = 0;1912 aggregator->actor_oper_aggregator_key = 0;1913 eth_zero_addr(aggregator->partner_system.mac_addr_value);1914 aggregator->partner_system_priority = 0;1915 aggregator->partner_oper_aggregator_key = 0;1916 aggregator->receive_state = 0;1917 aggregator->transmit_state = 0;1918 aggregator->lag_ports = NULL;1919 aggregator->is_active = 0;1920 aggregator->num_of_ports = 0;1921 pr_debug("%s: LAG %d was cleared\n",1922 aggregator->slave ?1923 aggregator->slave->dev->name : "NULL",1924 aggregator->aggregator_identifier);1925 }1926}1927 1928/**1929 * ad_initialize_agg - initialize a given aggregator's parameters1930 * @aggregator: the aggregator we're looking at1931 */1932static void ad_initialize_agg(struct aggregator *aggregator)1933{1934 if (aggregator) {1935 ad_clear_agg(aggregator);1936 1937 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);1938 aggregator->aggregator_identifier = 0;1939 aggregator->slave = NULL;1940 }1941}1942 1943/**1944 * ad_initialize_port - initialize a given port's parameters1945 * @port: the port we're looking at1946 * @lacp_fast: boolean. whether fast periodic should be used1947 */1948static void ad_initialize_port(struct port *port, int lacp_fast)1949{1950 static const struct port_params tmpl = {1951 .system_priority = 0xffff,1952 .key = 1,1953 .port_number = 1,1954 .port_priority = 0xff,1955 .port_state = 1,1956 };1957 static const struct lacpdu lacpdu = {1958 .subtype = 0x01,1959 .version_number = 0x01,1960 .tlv_type_actor_info = 0x01,1961 .actor_information_length = 0x14,1962 .tlv_type_partner_info = 0x02,1963 .partner_information_length = 0x14,1964 .tlv_type_collector_info = 0x03,1965 .collector_information_length = 0x10,1966 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),1967 };1968 1969 if (port) {1970 port->actor_port_priority = 0xff;1971 port->actor_port_aggregator_identifier = 0;1972 port->ntt = false;1973 port->actor_admin_port_state = LACP_STATE_AGGREGATION |1974 LACP_STATE_LACP_ACTIVITY;1975 port->actor_oper_port_state = LACP_STATE_AGGREGATION |1976 LACP_STATE_LACP_ACTIVITY;1977 1978 if (lacp_fast)1979 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;1980 1981 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));1982 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));1983 1984 port->is_enabled = true;1985 /* private parameters */1986 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;1987 port->sm_rx_state = 0;1988 port->sm_rx_timer_counter = 0;1989 port->sm_periodic_state = 0;1990 port->sm_periodic_timer_counter = 0;1991 port->sm_mux_state = 0;1992 port->sm_mux_timer_counter = 0;1993 port->sm_tx_state = 0;1994 port->aggregator = NULL;1995 port->next_port_in_aggregator = NULL;1996 port->transaction_id = 0;1997 1998 port->sm_churn_actor_timer_counter = 0;1999 port->sm_churn_actor_state = 0;2000 port->churn_actor_count = 0;2001 port->sm_churn_partner_timer_counter = 0;2002 port->sm_churn_partner_state = 0;2003 port->churn_partner_count = 0;2004 2005 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));2006 }2007}2008 2009/**2010 * ad_enable_collecting - enable a port's receive2011 * @port: the port we're looking at2012 *2013 * Enable @port if it's in an active aggregator2014 */2015static void ad_enable_collecting(struct port *port)2016{2017 if (port->aggregator->is_active) {2018 struct slave *slave = port->slave;2019 2020 slave_dbg(slave->bond->dev, slave->dev,2021 "Enabling collecting on port %d (LAG %d)\n",2022 port->actor_port_number,2023 port->aggregator->aggregator_identifier);2024 __enable_collecting_port(port);2025 }2026}2027 2028/**2029 * ad_disable_distributing - disable a port's transmit2030 * @port: the port we're looking at2031 * @update_slave_arr: Does slave array need update?2032 */2033static void ad_disable_distributing(struct port *port, bool *update_slave_arr)2034{2035 if (port->aggregator && __agg_has_partner(port->aggregator)) {2036 slave_dbg(port->slave->bond->dev, port->slave->dev,2037 "Disabling distributing on port %d (LAG %d)\n",2038 port->actor_port_number,2039 port->aggregator->aggregator_identifier);2040 __disable_distributing_port(port);2041 /* Slave array needs an update */2042 *update_slave_arr = true;2043 }2044}2045 2046/**2047 * ad_enable_collecting_distributing - enable a port's transmit/receive2048 * @port: the port we're looking at2049 * @update_slave_arr: Does slave array need update?2050 *2051 * Enable @port if it's in an active aggregator2052 */2053static void ad_enable_collecting_distributing(struct port *port,2054 bool *update_slave_arr)2055{2056 if (port->aggregator->is_active) {2057 slave_dbg(port->slave->bond->dev, port->slave->dev,2058 "Enabling port %d (LAG %d)\n",2059 port->actor_port_number,2060 port->aggregator->aggregator_identifier);2061 __enable_port(port);2062 /* Slave array needs update */2063 *update_slave_arr = true;2064 }2065}2066 2067/**2068 * ad_disable_collecting_distributing - disable a port's transmit/receive2069 * @port: the port we're looking at2070 * @update_slave_arr: Does slave array need update?2071 */2072static void ad_disable_collecting_distributing(struct port *port,2073 bool *update_slave_arr)2074{2075 if (port->aggregator && __agg_has_partner(port->aggregator)) {2076 slave_dbg(port->slave->bond->dev, port->slave->dev,2077 "Disabling port %d (LAG %d)\n",2078 port->actor_port_number,2079 port->aggregator->aggregator_identifier);2080 __disable_port(port);2081 /* Slave array needs an update */2082 *update_slave_arr = true;2083 }2084}2085 2086/**2087 * ad_marker_info_received - handle receive of a Marker information frame2088 * @marker_info: Marker info received2089 * @port: the port we're looking at2090 */2091static void ad_marker_info_received(struct bond_marker *marker_info,2092 struct port *port)2093{2094 struct bond_marker marker;2095 2096 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);2097 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);2098 2099 /* copy the received marker data to the response marker */2100 memcpy(&marker, marker_info, sizeof(struct bond_marker));2101 /* change the marker subtype to marker response */2102 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;2103 2104 /* send the marker response */2105 if (ad_marker_send(port, &marker) >= 0)2106 slave_dbg(port->slave->bond->dev, port->slave->dev,2107 "Sent Marker Response on port %d\n",2108 port->actor_port_number);2109}2110 2111/**2112 * ad_marker_response_received - handle receive of a marker response frame2113 * @marker: marker PDU received2114 * @port: the port we're looking at2115 *2116 * This function does nothing since we decided not to implement send and handle2117 * response for marker PDU's, in this stage, but only to respond to marker2118 * information.2119 */2120static void ad_marker_response_received(struct bond_marker *marker,2121 struct port *port)2122{2123 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);2124 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);2125 2126 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */2127}2128 2129/* ========= AD exported functions to the main bonding code ========= */2130 2131/* Check aggregators status in team every T seconds */2132#define AD_AGGREGATOR_SELECTION_TIMER 82133 2134/**2135 * bond_3ad_initiate_agg_selection - initate aggregator selection2136 * @bond: bonding struct2137 * @timeout: timeout value to set2138 *2139 * Set the aggregation selection timer, to initiate an agg selection in2140 * the very near future. Called during first initialization, and during2141 * any down to up transitions of the bond.2142 */2143void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)2144{2145 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);2146}2147 2148/**2149 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures2150 * @bond: bonding struct to work on2151 *2152 * Can be called only after the mac address of the bond is set.2153 */2154void bond_3ad_initialize(struct bonding *bond)2155{2156 BOND_AD_INFO(bond).aggregator_identifier = 0;2157 BOND_AD_INFO(bond).system.sys_priority =2158 bond->params.ad_actor_sys_prio;2159 if (is_zero_ether_addr(bond->params.ad_actor_system))2160 BOND_AD_INFO(bond).system.sys_mac_addr =2161 *((struct mac_addr *)bond->dev->dev_addr);2162 else2163 BOND_AD_INFO(bond).system.sys_mac_addr =2164 *((struct mac_addr *)bond->params.ad_actor_system);2165 2166 bond_3ad_initiate_agg_selection(bond,2167 AD_AGGREGATOR_SELECTION_TIMER *2168 ad_ticks_per_sec);2169}2170 2171/**2172 * bond_3ad_bind_slave - initialize a slave's port2173 * @slave: slave struct to work on2174 *2175 * Returns: 0 on success2176 * < 0 on error2177 */2178void bond_3ad_bind_slave(struct slave *slave)2179{2180 struct bonding *bond = bond_get_bond_by_slave(slave);2181 struct port *port;2182 struct aggregator *aggregator;2183 2184 /* check that the slave has not been initialized yet. */2185 if (SLAVE_AD_INFO(slave)->port.slave != slave) {2186 2187 /* port initialization */2188 port = &(SLAVE_AD_INFO(slave)->port);2189 2190 ad_initialize_port(port, bond->params.lacp_fast);2191 2192 port->slave = slave;2193 port->actor_port_number = SLAVE_AD_INFO(slave)->id;2194 /* key is determined according to the link speed, duplex and2195 * user key2196 */2197 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;2198 ad_update_actor_keys(port, false);2199 /* actor system is the bond's system */2200 __ad_actor_update_port(port);2201 /* tx timer(to verify that no more than MAX_TX_IN_SECOND2202 * lacpdu's are sent in one second)2203 */2204 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;2205 2206 __disable_port(port);2207 2208 /* aggregator initialization */2209 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);2210 2211 ad_initialize_agg(aggregator);2212 2213 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);2214 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;2215 aggregator->slave = slave;2216 aggregator->is_active = 0;2217 aggregator->num_of_ports = 0;2218 }2219}2220 2221/**2222 * bond_3ad_unbind_slave - deinitialize a slave's port2223 * @slave: slave struct to work on2224 *2225 * Search for the aggregator that is related to this port, remove the2226 * aggregator and assign another aggregator for other port related to it2227 * (if any), and remove the port.2228 */2229void bond_3ad_unbind_slave(struct slave *slave)2230{2231 struct port *port, *prev_port, *temp_port;2232 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;2233 int select_new_active_agg = 0;2234 struct bonding *bond = slave->bond;2235 struct slave *slave_iter;2236 struct list_head *iter;2237 bool dummy_slave_update; /* Ignore this value as caller updates array */2238 2239 /* Sync against bond_3ad_state_machine_handler() */2240 spin_lock_bh(&bond->mode_lock);2241 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);2242 port = &(SLAVE_AD_INFO(slave)->port);2243 2244 /* if slave is null, the whole port is not initialized */2245 if (!port->slave) {2246 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");2247 goto out;2248 }2249 2250 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",2251 aggregator->aggregator_identifier);2252 2253 /* Tell the partner that this port is not suitable for aggregation */2254 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;2255 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;2256 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;2257 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION;2258 __update_lacpdu_from_port(port);2259 ad_lacpdu_send(port);2260 2261 /* check if this aggregator is occupied */2262 if (aggregator->lag_ports) {2263 /* check if there are other ports related to this aggregator2264 * except the port related to this slave(thats ensure us that2265 * there is a reason to search for new aggregator, and that we2266 * will find one2267 */2268 if ((aggregator->lag_ports != port) ||2269 (aggregator->lag_ports->next_port_in_aggregator)) {2270 /* find new aggregator for the related port(s) */2271 bond_for_each_slave(bond, slave_iter, iter) {2272 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);2273 /* if the new aggregator is empty, or it is2274 * connected to our port only2275 */2276 if (!new_aggregator->lag_ports ||2277 ((new_aggregator->lag_ports == port) &&2278 !new_aggregator->lag_ports->next_port_in_aggregator))2279 break;2280 }2281 if (!slave_iter)2282 new_aggregator = NULL;2283 2284 /* if new aggregator found, copy the aggregator's2285 * parameters and connect the related lag_ports to the2286 * new aggregator2287 */2288 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {2289 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",2290 aggregator->aggregator_identifier,2291 new_aggregator->aggregator_identifier);2292 2293 if ((new_aggregator->lag_ports == port) &&2294 new_aggregator->is_active) {2295 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");2296 select_new_active_agg = 1;2297 }2298 2299 new_aggregator->is_individual = aggregator->is_individual;2300 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;2301 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;2302 new_aggregator->partner_system = aggregator->partner_system;2303 new_aggregator->partner_system_priority = aggregator->partner_system_priority;2304 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;2305 new_aggregator->receive_state = aggregator->receive_state;2306 new_aggregator->transmit_state = aggregator->transmit_state;2307 new_aggregator->lag_ports = aggregator->lag_ports;2308 new_aggregator->is_active = aggregator->is_active;2309 new_aggregator->num_of_ports = aggregator->num_of_ports;2310 2311 /* update the information that is written on2312 * the ports about the aggregator2313 */2314 for (temp_port = aggregator->lag_ports; temp_port;2315 temp_port = temp_port->next_port_in_aggregator) {2316 temp_port->aggregator = new_aggregator;2317 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;2318 }2319 2320 ad_clear_agg(aggregator);2321 2322 if (select_new_active_agg)2323 ad_agg_selection_logic(__get_first_agg(port),2324 &dummy_slave_update);2325 } else {2326 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");2327 }2328 } else {2329 /* in case that the only port related to this2330 * aggregator is the one we want to remove2331 */2332 select_new_active_agg = aggregator->is_active;2333 ad_clear_agg(aggregator);2334 if (select_new_active_agg) {2335 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");2336 /* select new active aggregator */2337 temp_aggregator = __get_first_agg(port);2338 if (temp_aggregator)2339 ad_agg_selection_logic(temp_aggregator,2340 &dummy_slave_update);2341 }2342 }2343 }2344 2345 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);2346 2347 /* find the aggregator that this port is connected to */2348 bond_for_each_slave(bond, slave_iter, iter) {2349 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);2350 prev_port = NULL;2351 /* search the port in the aggregator's related ports */2352 for (temp_port = temp_aggregator->lag_ports; temp_port;2353 prev_port = temp_port,2354 temp_port = temp_port->next_port_in_aggregator) {2355 if (temp_port == port) {2356 /* the aggregator found - detach the port from2357 * this aggregator2358 */2359 if (prev_port)2360 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;2361 else2362 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;2363 temp_aggregator->num_of_ports--;2364 if (__agg_active_ports(temp_aggregator) == 0) {2365 select_new_active_agg = temp_aggregator->is_active;2366 if (temp_aggregator->num_of_ports == 0)2367 ad_clear_agg(temp_aggregator);2368 if (select_new_active_agg) {2369 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");2370 /* select new active aggregator */2371 ad_agg_selection_logic(__get_first_agg(port),2372 &dummy_slave_update);2373 }2374 }2375 break;2376 }2377 }2378 }2379 port->slave = NULL;2380 2381out:2382 spin_unlock_bh(&bond->mode_lock);2383}2384 2385/**2386 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports2387 * @bond: bonding struct to work on2388 *2389 * If an ad_actor setting gets changed we need to update the individual port2390 * settings so the bond device will use the new values when it gets upped.2391 */2392void bond_3ad_update_ad_actor_settings(struct bonding *bond)2393{2394 struct list_head *iter;2395 struct slave *slave;2396 2397 ASSERT_RTNL();2398 2399 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;2400 if (is_zero_ether_addr(bond->params.ad_actor_system))2401 BOND_AD_INFO(bond).system.sys_mac_addr =2402 *((struct mac_addr *)bond->dev->dev_addr);2403 else2404 BOND_AD_INFO(bond).system.sys_mac_addr =2405 *((struct mac_addr *)bond->params.ad_actor_system);2406 2407 spin_lock_bh(&bond->mode_lock);2408 bond_for_each_slave(bond, slave, iter) {2409 struct port *port = &(SLAVE_AD_INFO(slave))->port;2410 2411 __ad_actor_update_port(port);2412 port->ntt = true;2413 }2414 spin_unlock_bh(&bond->mode_lock);2415}2416 2417/**2418 * bond_agg_timer_advance - advance agg_select_timer2419 * @bond: bonding structure2420 *2421 * Return true when agg_select_timer reaches 0.2422 */2423static bool bond_agg_timer_advance(struct bonding *bond)2424{2425 int val, nval;2426 2427 while (1) {2428 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);2429 if (!val)2430 return false;2431 nval = val - 1;2432 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,2433 val, nval) == val)2434 break;2435 }2436 return nval == 0;2437}2438 2439/**2440 * bond_3ad_state_machine_handler - handle state machines timeout2441 * @work: work context to fetch bonding struct to work on from2442 *2443 * The state machine handling concept in this module is to check every tick2444 * which state machine should operate any function. The execution order is2445 * round robin, so when we have an interaction between state machines, the2446 * reply of one to each other might be delayed until next tick.2447 *2448 * This function also complete the initialization when the agg_select_timer2449 * times out, and it selects an aggregator for the ports that are yet not2450 * related to any aggregator, and selects the active aggregator for a bond.2451 */2452void bond_3ad_state_machine_handler(struct work_struct *work)2453{2454 struct bonding *bond = container_of(work, struct bonding,2455 ad_work.work);2456 struct aggregator *aggregator;2457 struct list_head *iter;2458 struct slave *slave;2459 struct port *port;2460 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;2461 bool update_slave_arr = false;2462 2463 /* Lock to protect data accessed by all (e.g., port->sm_vars) and2464 * against running with bond_3ad_unbind_slave. ad_rx_machine may run2465 * concurrently due to incoming LACPDU as well.2466 */2467 spin_lock_bh(&bond->mode_lock);2468 rcu_read_lock();2469 2470 /* check if there are any slaves */2471 if (!bond_has_slaves(bond))2472 goto re_arm;2473 2474 if (bond_agg_timer_advance(bond)) {2475 slave = bond_first_slave_rcu(bond);2476 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;2477 2478 /* select the active aggregator for the bond */2479 if (port) {2480 if (!port->slave) {2481 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",2482 bond->dev->name);2483 goto re_arm;2484 }2485 2486 aggregator = __get_first_agg(port);2487 ad_agg_selection_logic(aggregator, &update_slave_arr);2488 }2489 bond_3ad_set_carrier(bond);2490 }2491 2492 /* for each port run the state machines */2493 bond_for_each_slave_rcu(bond, slave, iter) {2494 port = &(SLAVE_AD_INFO(slave)->port);2495 if (!port->slave) {2496 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",2497 bond->dev->name);2498 goto re_arm;2499 }2500 2501 ad_rx_machine(NULL, port);2502 ad_periodic_machine(port, &bond->params);2503 ad_port_selection_logic(port, &update_slave_arr);2504 ad_mux_machine(port, &update_slave_arr);2505 ad_tx_machine(port);2506 ad_churn_machine(port);2507 2508 /* turn off the BEGIN bit, since we already handled it */2509 if (port->sm_vars & AD_PORT_BEGIN)2510 port->sm_vars &= ~AD_PORT_BEGIN;2511 }2512 2513re_arm:2514 bond_for_each_slave_rcu(bond, slave, iter) {2515 if (slave->should_notify) {2516 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;2517 break;2518 }2519 }2520 rcu_read_unlock();2521 spin_unlock_bh(&bond->mode_lock);2522 2523 if (update_slave_arr)2524 bond_slave_arr_work_rearm(bond, 0);2525 2526 if (should_notify_rtnl && rtnl_trylock()) {2527 bond_slave_state_notify(bond);2528 rtnl_unlock();2529 }2530 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);2531}2532 2533/**2534 * bond_3ad_rx_indication - handle a received frame2535 * @lacpdu: received lacpdu2536 * @slave: slave struct to work on2537 *2538 * It is assumed that frames that were sent on this NIC don't returned as new2539 * received frames (loopback). Since only the payload is given to this2540 * function, it check for loopback.2541 */2542static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)2543{2544 struct bonding *bond = slave->bond;2545 int ret = RX_HANDLER_ANOTHER;2546 struct bond_marker *marker;2547 struct port *port;2548 atomic64_t *stat;2549 2550 port = &(SLAVE_AD_INFO(slave)->port);2551 if (!port->slave) {2552 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",2553 slave->dev->name, slave->bond->dev->name);2554 return ret;2555 }2556 2557 switch (lacpdu->subtype) {2558 case AD_TYPE_LACPDU:2559 ret = RX_HANDLER_CONSUMED;2560 slave_dbg(slave->bond->dev, slave->dev,2561 "Received LACPDU on port %d\n",2562 port->actor_port_number);2563 /* Protect against concurrent state machines */2564 spin_lock(&slave->bond->mode_lock);2565 ad_rx_machine(lacpdu, port);2566 spin_unlock(&slave->bond->mode_lock);2567 break;2568 case AD_TYPE_MARKER:2569 ret = RX_HANDLER_CONSUMED;2570 /* No need to convert fields to Little Endian since we2571 * don't use the marker's fields.2572 */2573 marker = (struct bond_marker *)lacpdu;2574 switch (marker->tlv_type) {2575 case AD_MARKER_INFORMATION_SUBTYPE:2576 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",2577 port->actor_port_number);2578 ad_marker_info_received(marker, port);2579 break;2580 case AD_MARKER_RESPONSE_SUBTYPE:2581 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",2582 port->actor_port_number);2583 ad_marker_response_received(marker, port);2584 break;2585 default:2586 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",2587 port->actor_port_number);2588 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;2589 atomic64_inc(stat);2590 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;2591 atomic64_inc(stat);2592 }2593 break;2594 default:2595 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);2596 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);2597 }2598 2599 return ret;2600}2601 2602/**2603 * ad_update_actor_keys - Update the oper / admin keys for a port based on2604 * its current speed and duplex settings.2605 *2606 * @port: the port we'are looking at2607 * @reset: Boolean to just reset the speed and the duplex part of the key2608 *2609 * The logic to change the oper / admin keys is:2610 * (a) A full duplex port can participate in LACP with partner.2611 * (b) When the speed is changed, LACP need to be reinitiated.2612 */2613static void ad_update_actor_keys(struct port *port, bool reset)2614{2615 u8 duplex = 0;2616 u16 ospeed = 0, speed = 0;2617 u16 old_oper_key = port->actor_oper_port_key;2618 2619 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);2620 if (!reset) {2621 speed = __get_link_speed(port);2622 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;2623 duplex = __get_duplex(port);2624 port->actor_admin_port_key |= (speed << 1) | duplex;2625 }2626 port->actor_oper_port_key = port->actor_admin_port_key;2627 2628 if (old_oper_key != port->actor_oper_port_key) {2629 /* Only 'duplex' port participates in LACP */2630 if (duplex)2631 port->sm_vars |= AD_PORT_LACP_ENABLED;2632 else2633 port->sm_vars &= ~AD_PORT_LACP_ENABLED;2634 2635 if (!reset) {2636 if (!speed) {2637 slave_err(port->slave->bond->dev,2638 port->slave->dev,2639 "speed changed to 0 on port %d\n",2640 port->actor_port_number);2641 } else if (duplex && ospeed != speed) {2642 /* Speed change restarts LACP state-machine */2643 port->sm_vars |= AD_PORT_BEGIN;2644 }2645 }2646 }2647}2648 2649/**2650 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex2651 * change indication2652 *2653 * @slave: slave struct to work on2654 *2655 * Handle reselection of aggregator (if needed) for this port.2656 */2657void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)2658{2659 struct port *port;2660 2661 port = &(SLAVE_AD_INFO(slave)->port);2662 2663 /* if slave is null, the whole port is not initialized */2664 if (!port->slave) {2665 slave_warn(slave->bond->dev, slave->dev,2666 "speed/duplex changed for uninitialized port\n");2667 return;2668 }2669 2670 spin_lock_bh(&slave->bond->mode_lock);2671 ad_update_actor_keys(port, false);2672 spin_unlock_bh(&slave->bond->mode_lock);2673 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",2674 port->actor_port_number);2675}2676 2677/**2678 * bond_3ad_handle_link_change - handle a slave's link status change indication2679 * @slave: slave struct to work on2680 * @link: whether the link is now up or down2681 *2682 * Handle reselection of aggregator (if needed) for this port.2683 */2684void bond_3ad_handle_link_change(struct slave *slave, char link)2685{2686 struct aggregator *agg;2687 struct port *port;2688 bool dummy;2689 2690 port = &(SLAVE_AD_INFO(slave)->port);2691 2692 /* if slave is null, the whole port is not initialized */2693 if (!port->slave) {2694 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");2695 return;2696 }2697 2698 spin_lock_bh(&slave->bond->mode_lock);2699 /* on link down we are zeroing duplex and speed since2700 * some of the adaptors(ce1000.lan) report full duplex/speed2701 * instead of N/A(duplex) / 0(speed).2702 *2703 * on link up we are forcing recheck on the duplex and speed since2704 * some of he adaptors(ce1000.lan) report.2705 */2706 if (link == BOND_LINK_UP) {2707 port->is_enabled = true;2708 ad_update_actor_keys(port, false);2709 } else {2710 /* link has failed */2711 port->is_enabled = false;2712 ad_update_actor_keys(port, true);2713 }2714 agg = __get_first_agg(port);2715 ad_agg_selection_logic(agg, &dummy);2716 2717 spin_unlock_bh(&slave->bond->mode_lock);2718 2719 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",2720 port->actor_port_number,2721 link == BOND_LINK_UP ? "UP" : "DOWN");2722 2723 /* RTNL is held and mode_lock is released so it's safe2724 * to update slave_array here.2725 */2726 bond_update_slave_arr(slave->bond, NULL);2727}2728 2729/**2730 * bond_3ad_set_carrier - set link state for bonding master2731 * @bond: bonding structure2732 *2733 * if we have an active aggregator, we're up, if not, we're down.2734 * Presumes that we cannot have an active aggregator if there are2735 * no slaves with link up.2736 *2737 * This behavior complies with IEEE 802.3 section 43.3.9.2738 *2739 * Called by bond_set_carrier(). Return zero if carrier state does not2740 * change, nonzero if it does.2741 */2742int bond_3ad_set_carrier(struct bonding *bond)2743{2744 struct aggregator *active;2745 struct slave *first_slave;2746 int ret = 1;2747 2748 rcu_read_lock();2749 first_slave = bond_first_slave_rcu(bond);2750 if (!first_slave) {2751 ret = 0;2752 goto out;2753 }2754 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));2755 if (active) {2756 /* are enough slaves available to consider link up? */2757 if (__agg_active_ports(active) < bond->params.min_links) {2758 if (netif_carrier_ok(bond->dev)) {2759 netif_carrier_off(bond->dev);2760 goto out;2761 }2762 } else if (!netif_carrier_ok(bond->dev)) {2763 netif_carrier_on(bond->dev);2764 goto out;2765 }2766 } else if (netif_carrier_ok(bond->dev)) {2767 netif_carrier_off(bond->dev);2768 }2769out:2770 rcu_read_unlock();2771 return ret;2772}2773 2774/**2775 * __bond_3ad_get_active_agg_info - get information of the active aggregator2776 * @bond: bonding struct to work on2777 * @ad_info: ad_info struct to fill with the bond's info2778 *2779 * Returns: 0 on success2780 * < 0 on error2781 */2782int __bond_3ad_get_active_agg_info(struct bonding *bond,2783 struct ad_info *ad_info)2784{2785 struct aggregator *aggregator = NULL;2786 struct list_head *iter;2787 struct slave *slave;2788 struct port *port;2789 2790 bond_for_each_slave_rcu(bond, slave, iter) {2791 port = &(SLAVE_AD_INFO(slave)->port);2792 if (port->aggregator && port->aggregator->is_active) {2793 aggregator = port->aggregator;2794 break;2795 }2796 }2797 2798 if (!aggregator)2799 return -1;2800 2801 ad_info->aggregator_id = aggregator->aggregator_identifier;2802 ad_info->ports = __agg_active_ports(aggregator);2803 ad_info->actor_key = aggregator->actor_oper_aggregator_key;2804 ad_info->partner_key = aggregator->partner_oper_aggregator_key;2805 ether_addr_copy(ad_info->partner_system,2806 aggregator->partner_system.mac_addr_value);2807 return 0;2808}2809 2810int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)2811{2812 int ret;2813 2814 rcu_read_lock();2815 ret = __bond_3ad_get_active_agg_info(bond, ad_info);2816 rcu_read_unlock();2817 2818 return ret;2819}2820 2821int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,2822 struct slave *slave)2823{2824 struct lacpdu *lacpdu, _lacpdu;2825 2826 if (skb->protocol != PKT_TYPE_LACPDU)2827 return RX_HANDLER_ANOTHER;2828 2829 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))2830 return RX_HANDLER_ANOTHER;2831 2832 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);2833 if (!lacpdu) {2834 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);2835 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);2836 return RX_HANDLER_ANOTHER;2837 }2838 2839 return bond_3ad_rx_indication(lacpdu, slave);2840}2841 2842/**2843 * bond_3ad_update_lacp_rate - change the lacp rate2844 * @bond: bonding struct2845 *2846 * When modify lacp_rate parameter via sysfs,2847 * update actor_oper_port_state of each port.2848 *2849 * Hold bond->mode_lock,2850 * so we can modify port->actor_oper_port_state,2851 * no matter bond is up or down.2852 */2853void bond_3ad_update_lacp_rate(struct bonding *bond)2854{2855 struct port *port = NULL;2856 struct list_head *iter;2857 struct slave *slave;2858 int lacp_fast;2859 2860 lacp_fast = bond->params.lacp_fast;2861 spin_lock_bh(&bond->mode_lock);2862 bond_for_each_slave(bond, slave, iter) {2863 port = &(SLAVE_AD_INFO(slave)->port);2864 if (lacp_fast)2865 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;2866 else2867 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT;2868 }2869 spin_unlock_bh(&bond->mode_lock);2870}2871 2872size_t bond_3ad_stats_size(void)2873{2874 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */2875 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */2876 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */2877 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */2878 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */2879 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */2880 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */2881 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */2882 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */2883}2884 2885int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)2886{2887 u64 val;2888 2889 val = atomic64_read(&stats->lacpdu_rx);2890 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,2891 BOND_3AD_STAT_PAD))2892 return -EMSGSIZE;2893 val = atomic64_read(&stats->lacpdu_tx);2894 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,2895 BOND_3AD_STAT_PAD))2896 return -EMSGSIZE;2897 val = atomic64_read(&stats->lacpdu_unknown_rx);2898 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,2899 BOND_3AD_STAT_PAD))2900 return -EMSGSIZE;2901 val = atomic64_read(&stats->lacpdu_illegal_rx);2902 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,2903 BOND_3AD_STAT_PAD))2904 return -EMSGSIZE;2905 2906 val = atomic64_read(&stats->marker_rx);2907 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,2908 BOND_3AD_STAT_PAD))2909 return -EMSGSIZE;2910 val = atomic64_read(&stats->marker_tx);2911 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,2912 BOND_3AD_STAT_PAD))2913 return -EMSGSIZE;2914 val = atomic64_read(&stats->marker_resp_rx);2915 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,2916 BOND_3AD_STAT_PAD))2917 return -EMSGSIZE;2918 val = atomic64_read(&stats->marker_resp_tx);2919 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,2920 BOND_3AD_STAT_PAD))2921 return -EMSGSIZE;2922 val = atomic64_read(&stats->marker_unknown_rx);2923 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,2924 BOND_3AD_STAT_PAD))2925 return -EMSGSIZE;2926 2927 return 0;2928}2929