1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
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>
19 /* General definitions */
20 #define AD_SHORT_TIMEOUT 1
21 #define AD_LONG_TIMEOUT 0
22 #define AD_STANDBY 0x2
23 #define AD_MAX_TX_IN_SECOND 3
24 #define AD_COLLECTOR_MAX_DELAY 0
26 /* Timer definitions (43.4.4 in the 802.3ad standard) */
27 #define AD_FAST_PERIODIC_TIME 1
28 #define AD_SLOW_PERIODIC_TIME 30
29 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
30 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
31 #define AD_CHURN_DETECTION_TIME 60
32 #define AD_AGGREGATE_WAIT_TIME 2
34 /* Port Variables definitions used by the State Machines (43.4.7 in the
37 #define AD_PORT_BEGIN 0x1
38 #define AD_PORT_LACP_ENABLED 0x2
39 #define AD_PORT_ACTOR_CHURN 0x4
40 #define AD_PORT_PARTNER_CHURN 0x8
41 #define AD_PORT_READY 0x10
42 #define AD_PORT_READY_N 0x20
43 #define AD_PORT_MATCHED 0x40
44 #define AD_PORT_STANDBY 0x80
45 #define AD_PORT_SELECTED 0x100
46 #define AD_PORT_MOVED 0x200
47 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
49 /* Port Key definitions
50 * key is determined according to the link speed, duplex and
51 * user key (which is yet not supported)
52 * --------------------------------------------------------------
53 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
54 * --------------------------------------------------------------
57 #define AD_DUPLEX_KEY_MASKS 0x1
58 #define AD_SPEED_KEY_MASKS 0x3E
59 #define AD_USER_KEY_MASKS 0xFFC0
61 enum ad_link_speed_type {
62 AD_LINK_SPEED_1MBPS = 1,
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,
80 /* compare MAC addresses */
81 #define MAC_ADDRESS_EQUAL(A, B) \
82 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
84 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
87 static u16 ad_ticks_per_sec;
88 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
90 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
91 MULTICAST_LACPDU_ADDR;
93 /* ================= main 802.3ad protocol functions ================== */
94 static int ad_lacpdu_send(struct port *port);
95 static int ad_marker_send(struct port *port, struct bond_marker *marker);
96 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
97 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
98 static void ad_tx_machine(struct port *port);
99 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params);
100 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
101 static void ad_agg_selection_logic(struct aggregator *aggregator,
102 bool *update_slave_arr);
103 static void ad_clear_agg(struct aggregator *aggregator);
104 static void ad_initialize_agg(struct aggregator *aggregator);
105 static void ad_initialize_port(struct port *port, int lacp_fast);
106 static void ad_enable_collecting_distributing(struct port *port,
107 bool *update_slave_arr);
108 static void ad_disable_collecting_distributing(struct port *port,
109 bool *update_slave_arr);
110 static void ad_marker_info_received(struct bond_marker *marker_info,
112 static void ad_marker_response_received(struct bond_marker *marker,
114 static void ad_update_actor_keys(struct port *port, bool reset);
117 /* ================= api to bonding and kernel code ================== */
120 * __get_bond_by_port - get the port's bonding struct
121 * @port: the port we're looking at
123 * Return @port's bonding struct, or %NULL if it can't be found.
125 static inline struct bonding *__get_bond_by_port(struct port *port)
127 if (port->slave == NULL)
130 return bond_get_bond_by_slave(port->slave);
134 * __get_first_agg - get the first aggregator in the bond
135 * @port: the port we're looking at
137 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
139 * The caller must hold RCU or RTNL lock.
141 static inline struct aggregator *__get_first_agg(struct port *port)
143 struct bonding *bond = __get_bond_by_port(port);
144 struct slave *first_slave;
145 struct aggregator *agg;
147 /* If there's no bond for this port, or bond has no slaves */
152 first_slave = bond_first_slave_rcu(bond);
153 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
160 * __agg_has_partner - see if we have a partner
161 * @agg: the agregator we're looking at
163 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
164 * address for the partner). Return 0 if not.
166 static inline int __agg_has_partner(struct aggregator *agg)
168 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
172 * __disable_port - disable the port's slave
173 * @port: the port we're looking at
175 static inline void __disable_port(struct port *port)
177 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
181 * __enable_port - enable the port's slave, if it's up
182 * @port: the port we're looking at
184 static inline void __enable_port(struct port *port)
186 struct slave *slave = port->slave;
188 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
189 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
193 * __port_is_enabled - check if the port's slave is in active state
194 * @port: the port we're looking at
196 static inline int __port_is_enabled(struct port *port)
198 return bond_is_active_slave(port->slave);
202 * __get_agg_selection_mode - get the aggregator selection mode
203 * @port: the port we're looking at
205 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
207 static inline u32 __get_agg_selection_mode(struct port *port)
209 struct bonding *bond = __get_bond_by_port(port);
212 return BOND_AD_STABLE;
214 return bond->params.ad_select;
218 * __check_agg_selection_timer - check if the selection timer has expired
219 * @port: the port we're looking at
221 static inline int __check_agg_selection_timer(struct port *port)
223 struct bonding *bond = __get_bond_by_port(port);
228 return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0;
232 * __get_link_speed - get a port's speed
233 * @port: the port we're looking at
235 * Return @port's speed in 802.3ad enum format. i.e. one of:
237 * %AD_LINK_SPEED_10MBPS,
238 * %AD_LINK_SPEED_100MBPS,
239 * %AD_LINK_SPEED_1000MBPS,
240 * %AD_LINK_SPEED_2500MBPS,
241 * %AD_LINK_SPEED_5000MBPS,
242 * %AD_LINK_SPEED_10000MBPS
243 * %AD_LINK_SPEED_14000MBPS,
244 * %AD_LINK_SPEED_20000MBPS
245 * %AD_LINK_SPEED_25000MBPS
246 * %AD_LINK_SPEED_40000MBPS
247 * %AD_LINK_SPEED_50000MBPS
248 * %AD_LINK_SPEED_56000MBPS
249 * %AD_LINK_SPEED_100000MBPS
250 * %AD_LINK_SPEED_200000MBPS
251 * %AD_LINK_SPEED_400000MBPS
253 static u16 __get_link_speed(struct port *port)
255 struct slave *slave = port->slave;
258 /* this if covers only a special case: when the configuration starts
259 * with link down, it sets the speed to 0.
260 * This is done in spite of the fact that the e100 driver reports 0
261 * to be compatible with MVT in the future.
263 if (slave->link != BOND_LINK_UP)
266 switch (slave->speed) {
268 speed = AD_LINK_SPEED_10MBPS;
272 speed = AD_LINK_SPEED_100MBPS;
276 speed = AD_LINK_SPEED_1000MBPS;
280 speed = AD_LINK_SPEED_2500MBPS;
284 speed = AD_LINK_SPEED_5000MBPS;
288 speed = AD_LINK_SPEED_10000MBPS;
292 speed = AD_LINK_SPEED_14000MBPS;
296 speed = AD_LINK_SPEED_20000MBPS;
300 speed = AD_LINK_SPEED_25000MBPS;
304 speed = AD_LINK_SPEED_40000MBPS;
308 speed = AD_LINK_SPEED_50000MBPS;
312 speed = AD_LINK_SPEED_56000MBPS;
316 speed = AD_LINK_SPEED_100000MBPS;
320 speed = AD_LINK_SPEED_200000MBPS;
324 speed = AD_LINK_SPEED_400000MBPS;
328 /* unknown speed value from ethtool. shouldn't happen */
329 if (slave->speed != SPEED_UNKNOWN)
330 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",
331 slave->bond->dev->name,
332 slave->dev->name, slave->speed,
333 port->actor_port_number);
339 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n",
340 port->actor_port_number, speed);
345 * __get_duplex - get a port's duplex
346 * @port: the port we're looking at
348 * Return @port's duplex in 802.3ad bitmask format. i.e.:
349 * 0x01 if in full duplex
352 static u8 __get_duplex(struct port *port)
354 struct slave *slave = port->slave;
357 /* handling a special case: when the configuration starts with
358 * link down, it sets the duplex to 0.
360 if (slave->link == BOND_LINK_UP) {
361 switch (slave->duplex) {
364 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",
365 port->actor_port_number);
370 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n",
371 port->actor_port_number);
378 static void __ad_actor_update_port(struct port *port)
380 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
382 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
383 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
389 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
390 * @timer_type: which timer to operate
391 * @par: timer parameter. see below
393 * If @timer_type is %current_while_timer, @par indicates long/short timer.
394 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
395 * %SLOW_PERIODIC_TIME.
397 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
399 u16 retval = 0; /* to silence the compiler */
401 switch (timer_type) {
402 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
404 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
406 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
408 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
409 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
411 case AD_PERIODIC_TIMER: /* for periodic machine */
412 retval = (par*ad_ticks_per_sec); /* long timeout */
414 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
415 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
417 case AD_WAIT_WHILE_TIMER: /* for selection machine */
418 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
426 /* ================= ad_rx_machine helper functions ================== */
429 * __choose_matched - update a port's matched variable from a received lacpdu
430 * @lacpdu: the lacpdu we've received
431 * @port: the port we're looking at
433 * Update the value of the matched variable, using parameter values from a
434 * newly received lacpdu. Parameter values for the partner carried in the
435 * received PDU are compared with the corresponding operational parameter
436 * values for the actor. Matched is set to TRUE if all of these parameters
437 * match and the PDU parameter partner_state.aggregation has the same value as
438 * actor_oper_port_state.aggregation and lacp will actively maintain the link
439 * in the aggregation. Matched is also set to TRUE if the value of
440 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
441 * an individual link and lacp will actively maintain the link. Otherwise,
442 * matched is set to FALSE. LACP is considered to be actively maintaining the
443 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
444 * the actor's actor_oper_port_state.lacp_activity and the PDU's
445 * partner_state.lacp_activity variables are TRUE.
447 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
448 * used here to implement the language from 802.3ad 43.4.9 that requires
449 * recordPDU to "match" the LACPDU parameters to the stored values.
451 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
453 /* check if all parameters are alike
454 * or this is individual link(aggregation == FALSE)
455 * then update the state machine Matched variable.
457 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
458 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
459 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
460 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
461 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
462 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) ||
463 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0)
465 port->sm_vars |= AD_PORT_MATCHED;
467 port->sm_vars &= ~AD_PORT_MATCHED;
472 * __record_pdu - record parameters from a received lacpdu
473 * @lacpdu: the lacpdu we've received
474 * @port: the port we're looking at
476 * Record the parameter values for the Actor carried in a received lacpdu as
477 * the current partner operational parameter values and sets
478 * actor_oper_port_state.defaulted to FALSE.
480 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
482 if (lacpdu && port) {
483 struct port_params *partner = &port->partner_oper;
485 __choose_matched(lacpdu, port);
486 /* record the new parameter values for the partner
489 partner->port_number = ntohs(lacpdu->actor_port);
490 partner->port_priority = ntohs(lacpdu->actor_port_priority);
491 partner->system = lacpdu->actor_system;
492 partner->system_priority = ntohs(lacpdu->actor_system_priority);
493 partner->key = ntohs(lacpdu->actor_key);
494 partner->port_state = lacpdu->actor_state;
496 /* set actor_oper_port_state.defaulted to FALSE */
497 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED;
499 /* set the partner sync. to on if the partner is sync,
500 * and the port is matched
502 if ((port->sm_vars & AD_PORT_MATCHED) &&
503 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) {
504 partner->port_state |= LACP_STATE_SYNCHRONIZATION;
505 slave_dbg(port->slave->bond->dev, port->slave->dev,
508 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION;
509 slave_dbg(port->slave->bond->dev, port->slave->dev,
516 * __record_default - record default parameters
517 * @port: the port we're looking at
519 * This function records the default parameter values for the partner carried
520 * in the Partner Admin parameters as the current partner operational parameter
521 * values and sets actor_oper_port_state.defaulted to TRUE.
523 static void __record_default(struct port *port)
526 /* record the partner admin parameters */
527 memcpy(&port->partner_oper, &port->partner_admin,
528 sizeof(struct port_params));
530 /* set actor_oper_port_state.defaulted to true */
531 port->actor_oper_port_state |= LACP_STATE_DEFAULTED;
536 * __update_selected - update a port's Selected variable from a received lacpdu
537 * @lacpdu: the lacpdu we've received
538 * @port: the port we're looking at
540 * Update the value of the selected variable, using parameter values from a
541 * newly received lacpdu. The parameter values for the Actor carried in the
542 * received PDU are compared with the corresponding operational parameter
543 * values for the ports partner. If one or more of the comparisons shows that
544 * the value(s) received in the PDU differ from the current operational values,
545 * then selected is set to FALSE and actor_oper_port_state.synchronization is
546 * set to out_of_sync. Otherwise, selected remains unchanged.
548 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
550 if (lacpdu && port) {
551 const struct port_params *partner = &port->partner_oper;
553 /* check if any parameter is different then
554 * update the state machine selected variable.
556 if (ntohs(lacpdu->actor_port) != partner->port_number ||
557 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
558 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
559 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
560 ntohs(lacpdu->actor_key) != partner->key ||
561 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) {
562 port->sm_vars &= ~AD_PORT_SELECTED;
568 * __update_default_selected - update a port's Selected variable from Partner
569 * @port: the port we're looking at
571 * This function updates the value of the selected variable, using the partner
572 * administrative parameter values. The administrative values are compared with
573 * the corresponding operational parameter values for the partner. If one or
574 * more of the comparisons shows that the administrative value(s) differ from
575 * the current operational values, then Selected is set to FALSE and
576 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
577 * Selected remains unchanged.
579 static void __update_default_selected(struct port *port)
582 const struct port_params *admin = &port->partner_admin;
583 const struct port_params *oper = &port->partner_oper;
585 /* check if any parameter is different then
586 * update the state machine selected variable.
588 if (admin->port_number != oper->port_number ||
589 admin->port_priority != oper->port_priority ||
590 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
591 admin->system_priority != oper->system_priority ||
592 admin->key != oper->key ||
593 (admin->port_state & LACP_STATE_AGGREGATION)
594 != (oper->port_state & LACP_STATE_AGGREGATION)) {
595 port->sm_vars &= ~AD_PORT_SELECTED;
601 * __update_ntt - update a port's ntt variable from a received lacpdu
602 * @lacpdu: the lacpdu we've received
603 * @port: the port we're looking at
605 * Updates the value of the ntt variable, using parameter values from a newly
606 * received lacpdu. The parameter values for the partner carried in the
607 * received PDU are compared with the corresponding operational parameter
608 * values for the Actor. If one or more of the comparisons shows that the
609 * value(s) received in the PDU differ from the current operational values,
610 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
612 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
614 /* validate lacpdu and port */
615 if (lacpdu && port) {
616 /* check if any parameter is different then
617 * update the port->ntt.
619 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
620 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
621 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
622 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
623 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
624 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) ||
625 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) ||
626 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) ||
627 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION))
635 * __agg_ports_are_ready - check if all ports in an aggregator are ready
636 * @aggregator: the aggregator we're looking at
639 static int __agg_ports_are_ready(struct aggregator *aggregator)
645 /* scan all ports in this aggregator to verfy if they are
648 for (port = aggregator->lag_ports;
650 port = port->next_port_in_aggregator) {
651 if (!(port->sm_vars & AD_PORT_READY_N)) {
662 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
663 * @aggregator: the aggregator we're looking at
664 * @val: Should the ports' ready bit be set on or off
667 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
671 for (port = aggregator->lag_ports; port;
672 port = port->next_port_in_aggregator) {
674 port->sm_vars |= AD_PORT_READY;
676 port->sm_vars &= ~AD_PORT_READY;
680 static int __agg_active_ports(struct aggregator *agg)
685 for (port = agg->lag_ports; port;
686 port = port->next_port_in_aggregator) {
687 if (port->is_enabled)
695 * __get_agg_bandwidth - get the total bandwidth of an aggregator
696 * @aggregator: the aggregator we're looking at
699 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
701 int nports = __agg_active_ports(aggregator);
705 switch (__get_link_speed(aggregator->lag_ports)) {
706 case AD_LINK_SPEED_1MBPS:
709 case AD_LINK_SPEED_10MBPS:
710 bandwidth = nports * 10;
712 case AD_LINK_SPEED_100MBPS:
713 bandwidth = nports * 100;
715 case AD_LINK_SPEED_1000MBPS:
716 bandwidth = nports * 1000;
718 case AD_LINK_SPEED_2500MBPS:
719 bandwidth = nports * 2500;
721 case AD_LINK_SPEED_5000MBPS:
722 bandwidth = nports * 5000;
724 case AD_LINK_SPEED_10000MBPS:
725 bandwidth = nports * 10000;
727 case AD_LINK_SPEED_14000MBPS:
728 bandwidth = nports * 14000;
730 case AD_LINK_SPEED_20000MBPS:
731 bandwidth = nports * 20000;
733 case AD_LINK_SPEED_25000MBPS:
734 bandwidth = nports * 25000;
736 case AD_LINK_SPEED_40000MBPS:
737 bandwidth = nports * 40000;
739 case AD_LINK_SPEED_50000MBPS:
740 bandwidth = nports * 50000;
742 case AD_LINK_SPEED_56000MBPS:
743 bandwidth = nports * 56000;
745 case AD_LINK_SPEED_100000MBPS:
746 bandwidth = nports * 100000;
748 case AD_LINK_SPEED_200000MBPS:
749 bandwidth = nports * 200000;
751 case AD_LINK_SPEED_400000MBPS:
752 bandwidth = nports * 400000;
755 bandwidth = 0; /* to silence the compiler */
762 * __get_active_agg - get the current active aggregator
763 * @aggregator: the aggregator we're looking at
765 * Caller must hold RCU lock.
767 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
769 struct bonding *bond = aggregator->slave->bond;
770 struct list_head *iter;
773 bond_for_each_slave_rcu(bond, slave, iter)
774 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
775 return &(SLAVE_AD_INFO(slave)->aggregator);
781 * __update_lacpdu_from_port - update a port's lacpdu fields
782 * @port: the port we're looking at
784 static inline void __update_lacpdu_from_port(struct port *port)
786 struct lacpdu *lacpdu = &port->lacpdu;
787 const struct port_params *partner = &port->partner_oper;
789 /* update current actual Actor parameters
790 * lacpdu->subtype initialized
791 * lacpdu->version_number initialized
792 * lacpdu->tlv_type_actor_info initialized
793 * lacpdu->actor_information_length initialized
796 lacpdu->actor_system_priority = htons(port->actor_system_priority);
797 lacpdu->actor_system = port->actor_system;
798 lacpdu->actor_key = htons(port->actor_oper_port_key);
799 lacpdu->actor_port_priority = htons(port->actor_port_priority);
800 lacpdu->actor_port = htons(port->actor_port_number);
801 lacpdu->actor_state = port->actor_oper_port_state;
802 slave_dbg(port->slave->bond->dev, port->slave->dev,
803 "update lacpdu: actor port state %x\n",
804 port->actor_oper_port_state);
806 /* lacpdu->reserved_3_1 initialized
807 * lacpdu->tlv_type_partner_info initialized
808 * lacpdu->partner_information_length initialized
811 lacpdu->partner_system_priority = htons(partner->system_priority);
812 lacpdu->partner_system = partner->system;
813 lacpdu->partner_key = htons(partner->key);
814 lacpdu->partner_port_priority = htons(partner->port_priority);
815 lacpdu->partner_port = htons(partner->port_number);
816 lacpdu->partner_state = partner->port_state;
818 /* lacpdu->reserved_3_2 initialized
819 * lacpdu->tlv_type_collector_info initialized
820 * lacpdu->collector_information_length initialized
821 * collector_max_delay initialized
822 * reserved_12[12] initialized
823 * tlv_type_terminator initialized
824 * terminator_length initialized
825 * reserved_50[50] initialized
829 /* ================= main 802.3ad protocol code ========================= */
832 * ad_lacpdu_send - send out a lacpdu packet on a given port
833 * @port: the port we're looking at
835 * Returns: 0 on success
838 static int ad_lacpdu_send(struct port *port)
840 struct slave *slave = port->slave;
842 struct lacpdu_header *lacpdu_header;
843 int length = sizeof(struct lacpdu_header);
845 skb = dev_alloc_skb(length);
849 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);
850 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);
852 skb->dev = slave->dev;
853 skb_reset_mac_header(skb);
854 skb->network_header = skb->mac_header + ETH_HLEN;
855 skb->protocol = PKT_TYPE_LACPDU;
856 skb->priority = TC_PRIO_CONTROL;
858 lacpdu_header = skb_put(skb, length);
860 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
861 /* Note: source address is set to be the member's PERMANENT address,
862 * because we use it to identify loopback lacpdus in receive.
864 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
865 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
867 lacpdu_header->lacpdu = port->lacpdu;
875 * ad_marker_send - send marker information/response on a given port
876 * @port: the port we're looking at
877 * @marker: marker data to send
879 * Returns: 0 on success
882 static int ad_marker_send(struct port *port, struct bond_marker *marker)
884 struct slave *slave = port->slave;
886 struct bond_marker_header *marker_header;
887 int length = sizeof(struct bond_marker_header);
889 skb = dev_alloc_skb(length + 16);
893 switch (marker->tlv_type) {
894 case AD_MARKER_INFORMATION_SUBTYPE:
895 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);
896 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);
898 case AD_MARKER_RESPONSE_SUBTYPE:
899 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);
900 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);
904 skb_reserve(skb, 16);
906 skb->dev = slave->dev;
907 skb_reset_mac_header(skb);
908 skb->network_header = skb->mac_header + ETH_HLEN;
909 skb->protocol = PKT_TYPE_LACPDU;
911 marker_header = skb_put(skb, length);
913 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
914 /* Note: source address is set to be the member's PERMANENT address,
915 * because we use it to identify loopback MARKERs in receive.
917 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
918 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
920 marker_header->marker = *marker;
928 * ad_mux_machine - handle a port's mux state machine
929 * @port: the port we're looking at
930 * @update_slave_arr: Does slave array need update?
932 static void ad_mux_machine(struct port *port, bool *update_slave_arr)
934 mux_states_t last_state;
936 /* keep current State Machine state to compare later if it was
939 last_state = port->sm_mux_state;
941 if (port->sm_vars & AD_PORT_BEGIN) {
942 port->sm_mux_state = AD_MUX_DETACHED;
944 switch (port->sm_mux_state) {
945 case AD_MUX_DETACHED:
946 if ((port->sm_vars & AD_PORT_SELECTED)
947 || (port->sm_vars & AD_PORT_STANDBY))
948 /* if SELECTED or STANDBY */
949 port->sm_mux_state = AD_MUX_WAITING;
952 /* if SELECTED == FALSE return to DETACH state */
953 if (!(port->sm_vars & AD_PORT_SELECTED)) {
954 port->sm_vars &= ~AD_PORT_READY_N;
955 /* in order to withhold the Selection Logic to
956 * check all ports READY_N value every callback
957 * cycle to update ready variable, we check
958 * READY_N and update READY here
960 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
961 port->sm_mux_state = AD_MUX_DETACHED;
965 /* check if the wait_while_timer expired */
966 if (port->sm_mux_timer_counter
967 && !(--port->sm_mux_timer_counter))
968 port->sm_vars |= AD_PORT_READY_N;
970 /* in order to withhold the selection logic to check
971 * all ports READY_N value every callback cycle to
972 * update ready variable, we check READY_N and update
975 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
977 /* if the wait_while_timer expired, and the port is
978 * in READY state, move to ATTACHED state
980 if ((port->sm_vars & AD_PORT_READY)
981 && !port->sm_mux_timer_counter)
982 port->sm_mux_state = AD_MUX_ATTACHED;
984 case AD_MUX_ATTACHED:
985 /* check also if agg_select_timer expired (so the
986 * edable port will take place only after this timer)
988 if ((port->sm_vars & AD_PORT_SELECTED) &&
989 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&
990 !__check_agg_selection_timer(port)) {
991 if (port->aggregator->is_active)
993 AD_MUX_COLLECTING_DISTRIBUTING;
994 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
995 (port->sm_vars & AD_PORT_STANDBY)) {
996 /* if UNSELECTED or STANDBY */
997 port->sm_vars &= ~AD_PORT_READY_N;
998 /* in order to withhold the selection logic to
999 * check all ports READY_N value every callback
1000 * cycle to update ready variable, we check
1001 * READY_N and update READY here
1003 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1004 port->sm_mux_state = AD_MUX_DETACHED;
1005 } else if (port->aggregator->is_active) {
1006 port->actor_oper_port_state |=
1007 LACP_STATE_SYNCHRONIZATION;
1010 case AD_MUX_COLLECTING_DISTRIBUTING:
1011 if (!(port->sm_vars & AD_PORT_SELECTED) ||
1012 (port->sm_vars & AD_PORT_STANDBY) ||
1013 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||
1014 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) {
1015 port->sm_mux_state = AD_MUX_ATTACHED;
1017 /* if port state hasn't changed make
1018 * sure that a collecting distributing
1019 * port in an active aggregator is enabled
1021 if (port->aggregator &&
1022 port->aggregator->is_active &&
1023 !__port_is_enabled(port)) {
1024 __enable_port(port);
1025 *update_slave_arr = true;
1034 /* check if the state machine was changed */
1035 if (port->sm_mux_state != last_state) {
1036 slave_dbg(port->slave->bond->dev, port->slave->dev,
1037 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
1038 port->actor_port_number,
1040 port->sm_mux_state);
1041 switch (port->sm_mux_state) {
1042 case AD_MUX_DETACHED:
1043 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
1044 ad_disable_collecting_distributing(port,
1046 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
1047 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
1050 case AD_MUX_WAITING:
1051 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1053 case AD_MUX_ATTACHED:
1054 if (port->aggregator->is_active)
1055 port->actor_oper_port_state |=
1056 LACP_STATE_SYNCHRONIZATION;
1058 port->actor_oper_port_state &=
1059 ~LACP_STATE_SYNCHRONIZATION;
1060 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
1061 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
1062 ad_disable_collecting_distributing(port,
1066 case AD_MUX_COLLECTING_DISTRIBUTING:
1067 port->actor_oper_port_state |= LACP_STATE_COLLECTING;
1068 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;
1069 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;
1070 ad_enable_collecting_distributing(port,
1081 * ad_rx_machine - handle a port's rx State Machine
1082 * @lacpdu: the lacpdu we've received
1083 * @port: the port we're looking at
1085 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1086 * CURRENT. If timer expired set the state machine in the proper state.
1087 * In other cases, this function checks if we need to switch to other state.
1089 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1091 rx_states_t last_state;
1093 /* keep current State Machine state to compare later if it was
1096 last_state = port->sm_rx_state;
1099 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx);
1100 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx);
1102 /* check if state machine should change state */
1104 /* first, check if port was reinitialized */
1105 if (port->sm_vars & AD_PORT_BEGIN) {
1106 port->sm_rx_state = AD_RX_INITIALIZE;
1107 port->sm_vars |= AD_PORT_CHURNED;
1108 /* check if port is not enabled */
1109 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
1110 port->sm_rx_state = AD_RX_PORT_DISABLED;
1111 /* check if new lacpdu arrived */
1112 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1113 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1114 (port->sm_rx_state == AD_RX_CURRENT))) {
1115 if (port->sm_rx_state != AD_RX_CURRENT)
1116 port->sm_vars |= AD_PORT_CHURNED;
1117 port->sm_rx_timer_counter = 0;
1118 port->sm_rx_state = AD_RX_CURRENT;
1120 /* if timer is on, and if it is expired */
1121 if (port->sm_rx_timer_counter &&
1122 !(--port->sm_rx_timer_counter)) {
1123 switch (port->sm_rx_state) {
1125 port->sm_rx_state = AD_RX_DEFAULTED;
1128 port->sm_rx_state = AD_RX_EXPIRED;
1134 /* if no lacpdu arrived and no timer is on */
1135 switch (port->sm_rx_state) {
1136 case AD_RX_PORT_DISABLED:
1137 if (port->is_enabled &&
1138 (port->sm_vars & AD_PORT_LACP_ENABLED))
1139 port->sm_rx_state = AD_RX_EXPIRED;
1140 else if (port->is_enabled
1142 & AD_PORT_LACP_ENABLED) == 0))
1143 port->sm_rx_state = AD_RX_LACP_DISABLED;
1152 /* check if the State machine was changed or new lacpdu arrived */
1153 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1154 slave_dbg(port->slave->bond->dev, port->slave->dev,
1155 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1156 port->actor_port_number,
1159 switch (port->sm_rx_state) {
1160 case AD_RX_INITIALIZE:
1161 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1162 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1164 port->sm_vars |= AD_PORT_LACP_ENABLED;
1165 port->sm_vars &= ~AD_PORT_SELECTED;
1166 __record_default(port);
1167 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1168 port->sm_rx_state = AD_RX_PORT_DISABLED;
1171 case AD_RX_PORT_DISABLED:
1172 port->sm_vars &= ~AD_PORT_MATCHED;
1174 case AD_RX_LACP_DISABLED:
1175 port->sm_vars &= ~AD_PORT_SELECTED;
1176 __record_default(port);
1177 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION;
1178 port->sm_vars |= AD_PORT_MATCHED;
1179 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1182 /* Reset of the Synchronization flag (Standard 43.4.12)
1183 * This reset cause to disable this port in the
1184 * COLLECTING_DISTRIBUTING state of the mux machine in
1185 * case of EXPIRED even if LINK_DOWN didn't arrive for
1188 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION;
1189 port->sm_vars &= ~AD_PORT_MATCHED;
1190 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT;
1191 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY;
1192 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1193 port->actor_oper_port_state |= LACP_STATE_EXPIRED;
1194 port->sm_vars |= AD_PORT_CHURNED;
1196 case AD_RX_DEFAULTED:
1197 __update_default_selected(port);
1198 __record_default(port);
1199 port->sm_vars |= AD_PORT_MATCHED;
1200 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1203 /* detect loopback situation */
1204 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1205 &(port->actor_system))) {
1206 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n"
1207 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n");
1210 __update_selected(lacpdu, port);
1211 __update_ntt(lacpdu, port);
1212 __record_pdu(lacpdu, port);
1213 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT));
1214 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1223 * ad_churn_machine - handle port churn's state machine
1224 * @port: the port we're looking at
1227 static void ad_churn_machine(struct port *port)
1229 if (port->sm_vars & AD_PORT_CHURNED) {
1230 port->sm_vars &= ~AD_PORT_CHURNED;
1231 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1232 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1233 port->sm_churn_actor_timer_counter =
1234 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1235 port->sm_churn_partner_timer_counter =
1236 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1239 if (port->sm_churn_actor_timer_counter &&
1240 !(--port->sm_churn_actor_timer_counter) &&
1241 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1242 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) {
1243 port->sm_churn_actor_state = AD_NO_CHURN;
1245 port->churn_actor_count++;
1246 port->sm_churn_actor_state = AD_CHURN;
1249 if (port->sm_churn_partner_timer_counter &&
1250 !(--port->sm_churn_partner_timer_counter) &&
1251 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1252 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) {
1253 port->sm_churn_partner_state = AD_NO_CHURN;
1255 port->churn_partner_count++;
1256 port->sm_churn_partner_state = AD_CHURN;
1262 * ad_tx_machine - handle a port's tx state machine
1263 * @port: the port we're looking at
1265 static void ad_tx_machine(struct port *port)
1267 /* check if tx timer expired, to verify that we do not send more than
1268 * 3 packets per second
1270 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1271 /* check if there is something to send */
1272 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1273 __update_lacpdu_from_port(port);
1275 if (ad_lacpdu_send(port) >= 0) {
1276 slave_dbg(port->slave->bond->dev,
1278 "Sent LACPDU on port %d\n",
1279 port->actor_port_number);
1281 /* mark ntt as false, so it will not be sent
1282 * again until demanded
1287 /* restart tx timer(to verify that we will not exceed
1288 * AD_MAX_TX_IN_SECOND
1290 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1295 * ad_periodic_machine - handle a port's periodic state machine
1296 * @port: the port we're looking at
1297 * @bond_params: bond parameters we will use
1299 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1301 static void ad_periodic_machine(struct port *port, struct bond_params *bond_params)
1303 periodic_states_t last_state;
1305 /* keep current state machine state to compare later if it was changed */
1306 last_state = port->sm_periodic_state;
1308 /* check if port was reinitialized */
1309 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1310 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) ||
1311 !bond_params->lacp_active) {
1312 port->sm_periodic_state = AD_NO_PERIODIC;
1314 /* check if state machine should change state */
1315 else if (port->sm_periodic_timer_counter) {
1316 /* check if periodic state machine expired */
1317 if (!(--port->sm_periodic_timer_counter)) {
1318 /* if expired then do tx */
1319 port->sm_periodic_state = AD_PERIODIC_TX;
1321 /* If not expired, check if there is some new timeout
1322 * parameter from the partner state
1324 switch (port->sm_periodic_state) {
1325 case AD_FAST_PERIODIC:
1326 if (!(port->partner_oper.port_state
1327 & LACP_STATE_LACP_TIMEOUT))
1328 port->sm_periodic_state = AD_SLOW_PERIODIC;
1330 case AD_SLOW_PERIODIC:
1331 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) {
1332 port->sm_periodic_timer_counter = 0;
1333 port->sm_periodic_state = AD_PERIODIC_TX;
1341 switch (port->sm_periodic_state) {
1342 case AD_NO_PERIODIC:
1343 port->sm_periodic_state = AD_FAST_PERIODIC;
1345 case AD_PERIODIC_TX:
1346 if (!(port->partner_oper.port_state &
1347 LACP_STATE_LACP_TIMEOUT))
1348 port->sm_periodic_state = AD_SLOW_PERIODIC;
1350 port->sm_periodic_state = AD_FAST_PERIODIC;
1357 /* check if the state machine was changed */
1358 if (port->sm_periodic_state != last_state) {
1359 slave_dbg(port->slave->bond->dev, port->slave->dev,
1360 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1361 port->actor_port_number, last_state,
1362 port->sm_periodic_state);
1363 switch (port->sm_periodic_state) {
1364 case AD_NO_PERIODIC:
1365 port->sm_periodic_timer_counter = 0;
1367 case AD_FAST_PERIODIC:
1368 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1369 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1371 case AD_SLOW_PERIODIC:
1372 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1373 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1375 case AD_PERIODIC_TX:
1385 * ad_port_selection_logic - select aggregation groups
1386 * @port: the port we're looking at
1387 * @update_slave_arr: Does slave array need update?
1389 * Select aggregation groups, and assign each port for it's aggregetor. The
1390 * selection logic is called in the inititalization (after all the handshkes),
1391 * and after every lacpdu receive (if selected is off).
1393 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1395 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1396 struct port *last_port = NULL, *curr_port;
1397 struct list_head *iter;
1398 struct bonding *bond;
1399 struct slave *slave;
1402 /* if the port is already Selected, do nothing */
1403 if (port->sm_vars & AD_PORT_SELECTED)
1406 bond = __get_bond_by_port(port);
1408 /* if the port is connected to other aggregator, detach it */
1409 if (port->aggregator) {
1410 /* detach the port from its former aggregator */
1411 temp_aggregator = port->aggregator;
1412 for (curr_port = temp_aggregator->lag_ports; curr_port;
1413 last_port = curr_port,
1414 curr_port = curr_port->next_port_in_aggregator) {
1415 if (curr_port == port) {
1416 temp_aggregator->num_of_ports--;
1417 /* if it is the first port attached to the
1421 temp_aggregator->lag_ports =
1422 port->next_port_in_aggregator;
1424 /* not the first port attached to the
1427 last_port->next_port_in_aggregator =
1428 port->next_port_in_aggregator;
1431 /* clear the port's relations to this
1434 port->aggregator = NULL;
1435 port->next_port_in_aggregator = NULL;
1436 port->actor_port_aggregator_identifier = 0;
1438 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n",
1439 port->actor_port_number,
1440 temp_aggregator->aggregator_identifier);
1441 /* if the aggregator is empty, clear its
1442 * parameters, and set it ready to be attached
1444 if (!temp_aggregator->lag_ports)
1445 ad_clear_agg(temp_aggregator);
1450 /* meaning: the port was related to an aggregator
1451 * but was not on the aggregator port list
1453 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n",
1454 port->slave->bond->dev->name,
1455 port->slave->dev->name,
1456 port->actor_port_number,
1457 port->aggregator->aggregator_identifier);
1460 /* search on all aggregators for a suitable aggregator for this port */
1461 bond_for_each_slave(bond, slave, iter) {
1462 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1464 /* keep a free aggregator for later use(if needed) */
1465 if (!aggregator->lag_ports) {
1466 if (!free_aggregator)
1467 free_aggregator = aggregator;
1470 /* check if current aggregator suits us */
1471 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1472 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1473 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1474 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1476 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1477 !aggregator->is_individual) /* but is not individual OR */
1480 /* attach to the founded aggregator */
1481 port->aggregator = aggregator;
1482 port->actor_port_aggregator_identifier =
1483 port->aggregator->aggregator_identifier;
1484 port->next_port_in_aggregator = aggregator->lag_ports;
1485 port->aggregator->num_of_ports++;
1486 aggregator->lag_ports = port;
1487 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n",
1488 port->actor_port_number,
1489 port->aggregator->aggregator_identifier);
1491 /* mark this port as selected */
1492 port->sm_vars |= AD_PORT_SELECTED;
1498 /* the port couldn't find an aggregator - attach it to a new
1502 if (free_aggregator) {
1503 /* assign port a new aggregator */
1504 port->aggregator = free_aggregator;
1505 port->actor_port_aggregator_identifier =
1506 port->aggregator->aggregator_identifier;
1508 /* update the new aggregator's parameters
1509 * if port was responsed from the end-user
1511 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1512 /* if port is full duplex */
1513 port->aggregator->is_individual = false;
1515 port->aggregator->is_individual = true;
1517 port->aggregator->actor_admin_aggregator_key =
1518 port->actor_admin_port_key;
1519 port->aggregator->actor_oper_aggregator_key =
1520 port->actor_oper_port_key;
1521 port->aggregator->partner_system =
1522 port->partner_oper.system;
1523 port->aggregator->partner_system_priority =
1524 port->partner_oper.system_priority;
1525 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1526 port->aggregator->receive_state = 1;
1527 port->aggregator->transmit_state = 1;
1528 port->aggregator->lag_ports = port;
1529 port->aggregator->num_of_ports++;
1531 /* mark this port as selected */
1532 port->sm_vars |= AD_PORT_SELECTED;
1534 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n",
1535 port->actor_port_number,
1536 port->aggregator->aggregator_identifier);
1538 slave_err(bond->dev, port->slave->dev,
1539 "Port %d did not find a suitable aggregator\n",
1540 port->actor_port_number);
1543 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1544 * in all aggregator's ports, else set ready=FALSE in all
1545 * aggregator's ports
1547 __set_agg_ports_ready(port->aggregator,
1548 __agg_ports_are_ready(port->aggregator));
1550 aggregator = __get_first_agg(port);
1551 ad_agg_selection_logic(aggregator, update_slave_arr);
1553 if (!port->aggregator->is_active)
1554 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
1557 /* Decide if "agg" is a better choice for the new active aggregator that
1558 * the current best, according to the ad_select policy.
1560 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1561 struct aggregator *curr)
1563 /* 0. If no best, select current.
1565 * 1. If the current agg is not individual, and the best is
1566 * individual, select current.
1568 * 2. If current agg is individual and the best is not, keep best.
1570 * 3. Therefore, current and best are both individual or both not
1573 * 3a. If current agg partner replied, and best agg partner did not,
1576 * 3b. If current agg partner did not reply and best agg partner
1577 * did reply, keep best.
1579 * 4. Therefore, current and best both have partner replies or
1580 * both do not, so perform selection policy:
1582 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1583 * select by bandwidth.
1585 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1590 if (!curr->is_individual && best->is_individual)
1593 if (curr->is_individual && !best->is_individual)
1596 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1599 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1602 switch (__get_agg_selection_mode(curr->lag_ports)) {
1604 if (__agg_active_ports(curr) > __agg_active_ports(best))
1607 if (__agg_active_ports(curr) < __agg_active_ports(best))
1611 case BOND_AD_STABLE:
1612 case BOND_AD_BANDWIDTH:
1613 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1619 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n",
1620 curr->slave->bond->dev->name,
1621 curr->slave->dev->name,
1622 __get_agg_selection_mode(curr->lag_ports));
1629 static int agg_device_up(const struct aggregator *agg)
1631 struct port *port = agg->lag_ports;
1636 for (port = agg->lag_ports; port;
1637 port = port->next_port_in_aggregator) {
1638 if (netif_running(port->slave->dev) &&
1639 netif_carrier_ok(port->slave->dev))
1647 * ad_agg_selection_logic - select an aggregation group for a team
1648 * @agg: the aggregator we're looking at
1649 * @update_slave_arr: Does slave array need update?
1651 * It is assumed that only one aggregator may be selected for a team.
1653 * The logic of this function is to select the aggregator according to
1654 * the ad_select policy:
1656 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1657 * it, and to reselect the active aggregator only if the previous
1658 * aggregator has no more ports related to it.
1660 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1661 * bandwidth, and reselect whenever a link state change takes place or the
1662 * set of slaves in the bond changes.
1664 * BOND_AD_COUNT: select the aggregator with largest number of ports
1665 * (slaves), and reselect whenever a link state change takes place or the
1666 * set of slaves in the bond changes.
1668 * FIXME: this function MUST be called with the first agg in the bond, or
1669 * __get_active_agg() won't work correctly. This function should be better
1670 * called with the bond itself, and retrieve the first agg from it.
1672 static void ad_agg_selection_logic(struct aggregator *agg,
1673 bool *update_slave_arr)
1675 struct aggregator *best, *active, *origin;
1676 struct bonding *bond = agg->slave->bond;
1677 struct list_head *iter;
1678 struct slave *slave;
1683 active = __get_active_agg(agg);
1684 best = (active && agg_device_up(active)) ? active : NULL;
1686 bond_for_each_slave_rcu(bond, slave, iter) {
1687 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1691 if (__agg_active_ports(agg) && agg_device_up(agg))
1692 best = ad_agg_selection_test(best, agg);
1696 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1697 /* For the STABLE policy, don't replace the old active
1698 * aggregator if it's still active (it has an answering
1699 * partner) or if both the best and active don't have an
1700 * answering partner.
1702 if (active && active->lag_ports &&
1703 __agg_active_ports(active) &&
1704 (__agg_has_partner(active) ||
1705 (!__agg_has_partner(active) &&
1706 !__agg_has_partner(best)))) {
1707 if (!(!active->actor_oper_aggregator_key &&
1708 best->actor_oper_aggregator_key)) {
1710 active->is_active = 1;
1715 if (best && (best == active)) {
1717 active->is_active = 1;
1720 /* if there is new best aggregator, activate it */
1722 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1723 best->slave ? best->slave->dev->name : "NULL",
1724 best->aggregator_identifier, best->num_of_ports,
1725 best->actor_oper_aggregator_key,
1726 best->partner_oper_aggregator_key,
1727 best->is_individual, best->is_active);
1728 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n",
1729 best->slave ? best->slave->dev->name : "NULL",
1730 best->lag_ports, best->slave);
1732 bond_for_each_slave_rcu(bond, slave, iter) {
1733 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1735 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1736 agg->aggregator_identifier, agg->num_of_ports,
1737 agg->actor_oper_aggregator_key,
1738 agg->partner_oper_aggregator_key,
1739 agg->is_individual, agg->is_active);
1742 /* check if any partner replies */
1743 if (best->is_individual)
1744 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1747 best->is_active = 1;
1748 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n",
1749 best->slave ? best->slave->dev->name : "NULL",
1750 best->aggregator_identifier);
1751 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1752 best->slave ? best->slave->dev->name : "NULL",
1753 best->aggregator_identifier, best->num_of_ports,
1754 best->actor_oper_aggregator_key,
1755 best->partner_oper_aggregator_key,
1756 best->is_individual, best->is_active);
1758 /* disable the ports that were related to the former
1762 for (port = active->lag_ports; port;
1763 port = port->next_port_in_aggregator) {
1764 __disable_port(port);
1767 /* Slave array needs update. */
1768 *update_slave_arr = true;
1771 /* if the selected aggregator is of join individuals
1772 * (partner_system is NULL), enable their ports
1774 active = __get_active_agg(origin);
1777 if (!__agg_has_partner(active)) {
1778 for (port = active->lag_ports; port;
1779 port = port->next_port_in_aggregator) {
1780 __enable_port(port);
1782 *update_slave_arr = true;
1788 bond_3ad_set_carrier(bond);
1792 * ad_clear_agg - clear a given aggregator's parameters
1793 * @aggregator: the aggregator we're looking at
1795 static void ad_clear_agg(struct aggregator *aggregator)
1798 aggregator->is_individual = false;
1799 aggregator->actor_admin_aggregator_key = 0;
1800 aggregator->actor_oper_aggregator_key = 0;
1801 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1802 aggregator->partner_system_priority = 0;
1803 aggregator->partner_oper_aggregator_key = 0;
1804 aggregator->receive_state = 0;
1805 aggregator->transmit_state = 0;
1806 aggregator->lag_ports = NULL;
1807 aggregator->is_active = 0;
1808 aggregator->num_of_ports = 0;
1809 pr_debug("%s: LAG %d was cleared\n",
1811 aggregator->slave->dev->name : "NULL",
1812 aggregator->aggregator_identifier);
1817 * ad_initialize_agg - initialize a given aggregator's parameters
1818 * @aggregator: the aggregator we're looking at
1820 static void ad_initialize_agg(struct aggregator *aggregator)
1823 ad_clear_agg(aggregator);
1825 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1826 aggregator->aggregator_identifier = 0;
1827 aggregator->slave = NULL;
1832 * ad_initialize_port - initialize a given port's parameters
1833 * @port: the port we're looking at
1834 * @lacp_fast: boolean. whether fast periodic should be used
1836 static void ad_initialize_port(struct port *port, int lacp_fast)
1838 static const struct port_params tmpl = {
1839 .system_priority = 0xffff,
1842 .port_priority = 0xff,
1845 static const struct lacpdu lacpdu = {
1847 .version_number = 0x01,
1848 .tlv_type_actor_info = 0x01,
1849 .actor_information_length = 0x14,
1850 .tlv_type_partner_info = 0x02,
1851 .partner_information_length = 0x14,
1852 .tlv_type_collector_info = 0x03,
1853 .collector_information_length = 0x10,
1854 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1858 port->actor_port_priority = 0xff;
1859 port->actor_port_aggregator_identifier = 0;
1861 port->actor_admin_port_state = LACP_STATE_AGGREGATION |
1862 LACP_STATE_LACP_ACTIVITY;
1863 port->actor_oper_port_state = LACP_STATE_AGGREGATION |
1864 LACP_STATE_LACP_ACTIVITY;
1867 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
1869 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1870 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1872 port->is_enabled = true;
1873 /* private parameters */
1874 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1875 port->sm_rx_state = 0;
1876 port->sm_rx_timer_counter = 0;
1877 port->sm_periodic_state = 0;
1878 port->sm_periodic_timer_counter = 0;
1879 port->sm_mux_state = 0;
1880 port->sm_mux_timer_counter = 0;
1881 port->sm_tx_state = 0;
1882 port->aggregator = NULL;
1883 port->next_port_in_aggregator = NULL;
1884 port->transaction_id = 0;
1886 port->sm_churn_actor_timer_counter = 0;
1887 port->sm_churn_actor_state = 0;
1888 port->churn_actor_count = 0;
1889 port->sm_churn_partner_timer_counter = 0;
1890 port->sm_churn_partner_state = 0;
1891 port->churn_partner_count = 0;
1893 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1898 * ad_enable_collecting_distributing - enable a port's transmit/receive
1899 * @port: the port we're looking at
1900 * @update_slave_arr: Does slave array need update?
1902 * Enable @port if it's in an active aggregator
1904 static void ad_enable_collecting_distributing(struct port *port,
1905 bool *update_slave_arr)
1907 if (port->aggregator->is_active) {
1908 slave_dbg(port->slave->bond->dev, port->slave->dev,
1909 "Enabling port %d (LAG %d)\n",
1910 port->actor_port_number,
1911 port->aggregator->aggregator_identifier);
1912 __enable_port(port);
1913 /* Slave array needs update */
1914 *update_slave_arr = true;
1919 * ad_disable_collecting_distributing - disable a port's transmit/receive
1920 * @port: the port we're looking at
1921 * @update_slave_arr: Does slave array need update?
1923 static void ad_disable_collecting_distributing(struct port *port,
1924 bool *update_slave_arr)
1926 if (port->aggregator &&
1927 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1928 &(null_mac_addr))) {
1929 slave_dbg(port->slave->bond->dev, port->slave->dev,
1930 "Disabling port %d (LAG %d)\n",
1931 port->actor_port_number,
1932 port->aggregator->aggregator_identifier);
1933 __disable_port(port);
1934 /* Slave array needs an update */
1935 *update_slave_arr = true;
1940 * ad_marker_info_received - handle receive of a Marker information frame
1941 * @marker_info: Marker info received
1942 * @port: the port we're looking at
1944 static void ad_marker_info_received(struct bond_marker *marker_info,
1947 struct bond_marker marker;
1949 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);
1950 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);
1952 /* copy the received marker data to the response marker */
1953 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1954 /* change the marker subtype to marker response */
1955 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1957 /* send the marker response */
1958 if (ad_marker_send(port, &marker) >= 0)
1959 slave_dbg(port->slave->bond->dev, port->slave->dev,
1960 "Sent Marker Response on port %d\n",
1961 port->actor_port_number);
1965 * ad_marker_response_received - handle receive of a marker response frame
1966 * @marker: marker PDU received
1967 * @port: the port we're looking at
1969 * This function does nothing since we decided not to implement send and handle
1970 * response for marker PDU's, in this stage, but only to respond to marker
1973 static void ad_marker_response_received(struct bond_marker *marker,
1976 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);
1977 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);
1979 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1982 /* ========= AD exported functions to the main bonding code ========= */
1984 /* Check aggregators status in team every T seconds */
1985 #define AD_AGGREGATOR_SELECTION_TIMER 8
1988 * bond_3ad_initiate_agg_selection - initate aggregator selection
1989 * @bond: bonding struct
1990 * @timeout: timeout value to set
1992 * Set the aggregation selection timer, to initiate an agg selection in
1993 * the very near future. Called during first initialization, and during
1994 * any down to up transitions of the bond.
1996 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1998 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);
2002 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
2003 * @bond: bonding struct to work on
2004 * @tick_resolution: tick duration (millisecond resolution)
2006 * Can be called only after the mac address of the bond is set.
2008 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
2010 /* check that the bond is not initialized yet */
2011 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
2012 bond->dev->dev_addr)) {
2014 BOND_AD_INFO(bond).aggregator_identifier = 0;
2016 BOND_AD_INFO(bond).system.sys_priority =
2017 bond->params.ad_actor_sys_prio;
2018 if (is_zero_ether_addr(bond->params.ad_actor_system))
2019 BOND_AD_INFO(bond).system.sys_mac_addr =
2020 *((struct mac_addr *)bond->dev->dev_addr);
2022 BOND_AD_INFO(bond).system.sys_mac_addr =
2023 *((struct mac_addr *)bond->params.ad_actor_system);
2025 /* initialize how many times this module is called in one
2026 * second (should be about every 100ms)
2028 ad_ticks_per_sec = tick_resolution;
2030 bond_3ad_initiate_agg_selection(bond,
2031 AD_AGGREGATOR_SELECTION_TIMER *
2037 * bond_3ad_bind_slave - initialize a slave's port
2038 * @slave: slave struct to work on
2040 * Returns: 0 on success
2043 void bond_3ad_bind_slave(struct slave *slave)
2045 struct bonding *bond = bond_get_bond_by_slave(slave);
2047 struct aggregator *aggregator;
2049 /* check that the slave has not been initialized yet. */
2050 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
2052 /* port initialization */
2053 port = &(SLAVE_AD_INFO(slave)->port);
2055 ad_initialize_port(port, bond->params.lacp_fast);
2057 port->slave = slave;
2058 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
2059 /* key is determined according to the link speed, duplex and
2062 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
2063 ad_update_actor_keys(port, false);
2064 /* actor system is the bond's system */
2065 __ad_actor_update_port(port);
2066 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
2067 * lacpdu's are sent in one second)
2069 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
2071 __disable_port(port);
2073 /* aggregator initialization */
2074 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2076 ad_initialize_agg(aggregator);
2078 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2079 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2080 aggregator->slave = slave;
2081 aggregator->is_active = 0;
2082 aggregator->num_of_ports = 0;
2087 * bond_3ad_unbind_slave - deinitialize a slave's port
2088 * @slave: slave struct to work on
2090 * Search for the aggregator that is related to this port, remove the
2091 * aggregator and assign another aggregator for other port related to it
2092 * (if any), and remove the port.
2094 void bond_3ad_unbind_slave(struct slave *slave)
2096 struct port *port, *prev_port, *temp_port;
2097 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2098 int select_new_active_agg = 0;
2099 struct bonding *bond = slave->bond;
2100 struct slave *slave_iter;
2101 struct list_head *iter;
2102 bool dummy_slave_update; /* Ignore this value as caller updates array */
2104 /* Sync against bond_3ad_state_machine_handler() */
2105 spin_lock_bh(&bond->mode_lock);
2106 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2107 port = &(SLAVE_AD_INFO(slave)->port);
2109 /* if slave is null, the whole port is not initialized */
2111 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");
2115 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",
2116 aggregator->aggregator_identifier);
2118 /* Tell the partner that this port is not suitable for aggregation */
2119 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
2120 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
2121 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
2122 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION;
2123 __update_lacpdu_from_port(port);
2124 ad_lacpdu_send(port);
2126 /* check if this aggregator is occupied */
2127 if (aggregator->lag_ports) {
2128 /* check if there are other ports related to this aggregator
2129 * except the port related to this slave(thats ensure us that
2130 * there is a reason to search for new aggregator, and that we
2133 if ((aggregator->lag_ports != port) ||
2134 (aggregator->lag_ports->next_port_in_aggregator)) {
2135 /* find new aggregator for the related port(s) */
2136 bond_for_each_slave(bond, slave_iter, iter) {
2137 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2138 /* if the new aggregator is empty, or it is
2139 * connected to our port only
2141 if (!new_aggregator->lag_ports ||
2142 ((new_aggregator->lag_ports == port) &&
2143 !new_aggregator->lag_ports->next_port_in_aggregator))
2147 new_aggregator = NULL;
2149 /* if new aggregator found, copy the aggregator's
2150 * parameters and connect the related lag_ports to the
2153 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2154 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2155 aggregator->aggregator_identifier,
2156 new_aggregator->aggregator_identifier);
2158 if ((new_aggregator->lag_ports == port) &&
2159 new_aggregator->is_active) {
2160 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2161 select_new_active_agg = 1;
2164 new_aggregator->is_individual = aggregator->is_individual;
2165 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2166 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2167 new_aggregator->partner_system = aggregator->partner_system;
2168 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2169 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2170 new_aggregator->receive_state = aggregator->receive_state;
2171 new_aggregator->transmit_state = aggregator->transmit_state;
2172 new_aggregator->lag_ports = aggregator->lag_ports;
2173 new_aggregator->is_active = aggregator->is_active;
2174 new_aggregator->num_of_ports = aggregator->num_of_ports;
2176 /* update the information that is written on
2177 * the ports about the aggregator
2179 for (temp_port = aggregator->lag_ports; temp_port;
2180 temp_port = temp_port->next_port_in_aggregator) {
2181 temp_port->aggregator = new_aggregator;
2182 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2185 ad_clear_agg(aggregator);
2187 if (select_new_active_agg)
2188 ad_agg_selection_logic(__get_first_agg(port),
2189 &dummy_slave_update);
2191 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2194 /* in case that the only port related to this
2195 * aggregator is the one we want to remove
2197 select_new_active_agg = aggregator->is_active;
2198 ad_clear_agg(aggregator);
2199 if (select_new_active_agg) {
2200 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2201 /* select new active aggregator */
2202 temp_aggregator = __get_first_agg(port);
2203 if (temp_aggregator)
2204 ad_agg_selection_logic(temp_aggregator,
2205 &dummy_slave_update);
2210 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);
2212 /* find the aggregator that this port is connected to */
2213 bond_for_each_slave(bond, slave_iter, iter) {
2214 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2216 /* search the port in the aggregator's related ports */
2217 for (temp_port = temp_aggregator->lag_ports; temp_port;
2218 prev_port = temp_port,
2219 temp_port = temp_port->next_port_in_aggregator) {
2220 if (temp_port == port) {
2221 /* the aggregator found - detach the port from
2225 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2227 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2228 temp_aggregator->num_of_ports--;
2229 if (__agg_active_ports(temp_aggregator) == 0) {
2230 select_new_active_agg = temp_aggregator->is_active;
2231 if (temp_aggregator->num_of_ports == 0)
2232 ad_clear_agg(temp_aggregator);
2233 if (select_new_active_agg) {
2234 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2235 /* select new active aggregator */
2236 ad_agg_selection_logic(__get_first_agg(port),
2237 &dummy_slave_update);
2247 spin_unlock_bh(&bond->mode_lock);
2251 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2252 * @bond: bonding struct to work on
2254 * If an ad_actor setting gets changed we need to update the individual port
2255 * settings so the bond device will use the new values when it gets upped.
2257 void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2259 struct list_head *iter;
2260 struct slave *slave;
2264 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2265 if (is_zero_ether_addr(bond->params.ad_actor_system))
2266 BOND_AD_INFO(bond).system.sys_mac_addr =
2267 *((struct mac_addr *)bond->dev->dev_addr);
2269 BOND_AD_INFO(bond).system.sys_mac_addr =
2270 *((struct mac_addr *)bond->params.ad_actor_system);
2272 spin_lock_bh(&bond->mode_lock);
2273 bond_for_each_slave(bond, slave, iter) {
2274 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2276 __ad_actor_update_port(port);
2279 spin_unlock_bh(&bond->mode_lock);
2283 * bond_agg_timer_advance - advance agg_select_timer
2284 * @bond: bonding structure
2286 * Return true when agg_select_timer reaches 0.
2288 static bool bond_agg_timer_advance(struct bonding *bond)
2293 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);
2297 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,
2305 * bond_3ad_state_machine_handler - handle state machines timeout
2306 * @work: work context to fetch bonding struct to work on from
2308 * The state machine handling concept in this module is to check every tick
2309 * which state machine should operate any function. The execution order is
2310 * round robin, so when we have an interaction between state machines, the
2311 * reply of one to each other might be delayed until next tick.
2313 * This function also complete the initialization when the agg_select_timer
2314 * times out, and it selects an aggregator for the ports that are yet not
2315 * related to any aggregator, and selects the active aggregator for a bond.
2317 void bond_3ad_state_machine_handler(struct work_struct *work)
2319 struct bonding *bond = container_of(work, struct bonding,
2321 struct aggregator *aggregator;
2322 struct list_head *iter;
2323 struct slave *slave;
2325 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2326 bool update_slave_arr = false;
2328 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2329 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2330 * concurrently due to incoming LACPDU as well.
2332 spin_lock_bh(&bond->mode_lock);
2335 /* check if there are any slaves */
2336 if (!bond_has_slaves(bond))
2339 if (bond_agg_timer_advance(bond)) {
2340 slave = bond_first_slave_rcu(bond);
2341 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2343 /* select the active aggregator for the bond */
2346 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2351 aggregator = __get_first_agg(port);
2352 ad_agg_selection_logic(aggregator, &update_slave_arr);
2354 bond_3ad_set_carrier(bond);
2357 /* for each port run the state machines */
2358 bond_for_each_slave_rcu(bond, slave, iter) {
2359 port = &(SLAVE_AD_INFO(slave)->port);
2361 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2366 ad_rx_machine(NULL, port);
2367 ad_periodic_machine(port, &bond->params);
2368 ad_port_selection_logic(port, &update_slave_arr);
2369 ad_mux_machine(port, &update_slave_arr);
2370 ad_tx_machine(port);
2371 ad_churn_machine(port);
2373 /* turn off the BEGIN bit, since we already handled it */
2374 if (port->sm_vars & AD_PORT_BEGIN)
2375 port->sm_vars &= ~AD_PORT_BEGIN;
2379 bond_for_each_slave_rcu(bond, slave, iter) {
2380 if (slave->should_notify) {
2381 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2386 spin_unlock_bh(&bond->mode_lock);
2388 if (update_slave_arr)
2389 bond_slave_arr_work_rearm(bond, 0);
2391 if (should_notify_rtnl && rtnl_trylock()) {
2392 bond_slave_state_notify(bond);
2395 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2399 * bond_3ad_rx_indication - handle a received frame
2400 * @lacpdu: received lacpdu
2401 * @slave: slave struct to work on
2403 * It is assumed that frames that were sent on this NIC don't returned as new
2404 * received frames (loopback). Since only the payload is given to this
2405 * function, it check for loopback.
2407 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)
2409 struct bonding *bond = slave->bond;
2410 int ret = RX_HANDLER_ANOTHER;
2411 struct bond_marker *marker;
2415 port = &(SLAVE_AD_INFO(slave)->port);
2417 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2418 slave->dev->name, slave->bond->dev->name);
2422 switch (lacpdu->subtype) {
2423 case AD_TYPE_LACPDU:
2424 ret = RX_HANDLER_CONSUMED;
2425 slave_dbg(slave->bond->dev, slave->dev,
2426 "Received LACPDU on port %d\n",
2427 port->actor_port_number);
2428 /* Protect against concurrent state machines */
2429 spin_lock(&slave->bond->mode_lock);
2430 ad_rx_machine(lacpdu, port);
2431 spin_unlock(&slave->bond->mode_lock);
2433 case AD_TYPE_MARKER:
2434 ret = RX_HANDLER_CONSUMED;
2435 /* No need to convert fields to Little Endian since we
2436 * don't use the marker's fields.
2438 marker = (struct bond_marker *)lacpdu;
2439 switch (marker->tlv_type) {
2440 case AD_MARKER_INFORMATION_SUBTYPE:
2441 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",
2442 port->actor_port_number);
2443 ad_marker_info_received(marker, port);
2445 case AD_MARKER_RESPONSE_SUBTYPE:
2446 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",
2447 port->actor_port_number);
2448 ad_marker_response_received(marker, port);
2451 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",
2452 port->actor_port_number);
2453 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;
2455 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;
2460 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);
2461 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);
2468 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2469 * its current speed and duplex settings.
2471 * @port: the port we'are looking at
2472 * @reset: Boolean to just reset the speed and the duplex part of the key
2474 * The logic to change the oper / admin keys is:
2475 * (a) A full duplex port can participate in LACP with partner.
2476 * (b) When the speed is changed, LACP need to be reinitiated.
2478 static void ad_update_actor_keys(struct port *port, bool reset)
2481 u16 ospeed = 0, speed = 0;
2482 u16 old_oper_key = port->actor_oper_port_key;
2484 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2486 speed = __get_link_speed(port);
2487 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2488 duplex = __get_duplex(port);
2489 port->actor_admin_port_key |= (speed << 1) | duplex;
2491 port->actor_oper_port_key = port->actor_admin_port_key;
2493 if (old_oper_key != port->actor_oper_port_key) {
2494 /* Only 'duplex' port participates in LACP */
2496 port->sm_vars |= AD_PORT_LACP_ENABLED;
2498 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2502 slave_err(port->slave->bond->dev,
2504 "speed changed to 0 on port %d\n",
2505 port->actor_port_number);
2506 } else if (duplex && ospeed != speed) {
2507 /* Speed change restarts LACP state-machine */
2508 port->sm_vars |= AD_PORT_BEGIN;
2515 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2518 * @slave: slave struct to work on
2520 * Handle reselection of aggregator (if needed) for this port.
2522 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2526 port = &(SLAVE_AD_INFO(slave)->port);
2528 /* if slave is null, the whole port is not initialized */
2530 slave_warn(slave->bond->dev, slave->dev,
2531 "speed/duplex changed for uninitialized port\n");
2535 spin_lock_bh(&slave->bond->mode_lock);
2536 ad_update_actor_keys(port, false);
2537 spin_unlock_bh(&slave->bond->mode_lock);
2538 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",
2539 port->actor_port_number);
2543 * bond_3ad_handle_link_change - handle a slave's link status change indication
2544 * @slave: slave struct to work on
2545 * @link: whether the link is now up or down
2547 * Handle reselection of aggregator (if needed) for this port.
2549 void bond_3ad_handle_link_change(struct slave *slave, char link)
2551 struct aggregator *agg;
2555 port = &(SLAVE_AD_INFO(slave)->port);
2557 /* if slave is null, the whole port is not initialized */
2559 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");
2563 spin_lock_bh(&slave->bond->mode_lock);
2564 /* on link down we are zeroing duplex and speed since
2565 * some of the adaptors(ce1000.lan) report full duplex/speed
2566 * instead of N/A(duplex) / 0(speed).
2568 * on link up we are forcing recheck on the duplex and speed since
2569 * some of he adaptors(ce1000.lan) report.
2571 if (link == BOND_LINK_UP) {
2572 port->is_enabled = true;
2573 ad_update_actor_keys(port, false);
2575 /* link has failed */
2576 port->is_enabled = false;
2577 ad_update_actor_keys(port, true);
2579 agg = __get_first_agg(port);
2580 ad_agg_selection_logic(agg, &dummy);
2582 spin_unlock_bh(&slave->bond->mode_lock);
2584 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",
2585 port->actor_port_number,
2586 link == BOND_LINK_UP ? "UP" : "DOWN");
2588 /* RTNL is held and mode_lock is released so it's safe
2589 * to update slave_array here.
2591 bond_update_slave_arr(slave->bond, NULL);
2595 * bond_3ad_set_carrier - set link state for bonding master
2596 * @bond: bonding structure
2598 * if we have an active aggregator, we're up, if not, we're down.
2599 * Presumes that we cannot have an active aggregator if there are
2600 * no slaves with link up.
2602 * This behavior complies with IEEE 802.3 section 43.3.9.
2604 * Called by bond_set_carrier(). Return zero if carrier state does not
2605 * change, nonzero if it does.
2607 int bond_3ad_set_carrier(struct bonding *bond)
2609 struct aggregator *active;
2610 struct slave *first_slave;
2614 first_slave = bond_first_slave_rcu(bond);
2619 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2621 /* are enough slaves available to consider link up? */
2622 if (__agg_active_ports(active) < bond->params.min_links) {
2623 if (netif_carrier_ok(bond->dev)) {
2624 netif_carrier_off(bond->dev);
2627 } else if (!netif_carrier_ok(bond->dev)) {
2628 netif_carrier_on(bond->dev);
2631 } else if (netif_carrier_ok(bond->dev)) {
2632 netif_carrier_off(bond->dev);
2640 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2641 * @bond: bonding struct to work on
2642 * @ad_info: ad_info struct to fill with the bond's info
2644 * Returns: 0 on success
2647 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2648 struct ad_info *ad_info)
2650 struct aggregator *aggregator = NULL;
2651 struct list_head *iter;
2652 struct slave *slave;
2655 bond_for_each_slave_rcu(bond, slave, iter) {
2656 port = &(SLAVE_AD_INFO(slave)->port);
2657 if (port->aggregator && port->aggregator->is_active) {
2658 aggregator = port->aggregator;
2666 ad_info->aggregator_id = aggregator->aggregator_identifier;
2667 ad_info->ports = __agg_active_ports(aggregator);
2668 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2669 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2670 ether_addr_copy(ad_info->partner_system,
2671 aggregator->partner_system.mac_addr_value);
2675 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2680 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2686 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2687 struct slave *slave)
2689 struct lacpdu *lacpdu, _lacpdu;
2691 if (skb->protocol != PKT_TYPE_LACPDU)
2692 return RX_HANDLER_ANOTHER;
2694 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2695 return RX_HANDLER_ANOTHER;
2697 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2699 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);
2700 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);
2701 return RX_HANDLER_ANOTHER;
2704 return bond_3ad_rx_indication(lacpdu, slave);
2708 * bond_3ad_update_lacp_rate - change the lacp rate
2709 * @bond: bonding struct
2711 * When modify lacp_rate parameter via sysfs,
2712 * update actor_oper_port_state of each port.
2714 * Hold bond->mode_lock,
2715 * so we can modify port->actor_oper_port_state,
2716 * no matter bond is up or down.
2718 void bond_3ad_update_lacp_rate(struct bonding *bond)
2720 struct port *port = NULL;
2721 struct list_head *iter;
2722 struct slave *slave;
2725 lacp_fast = bond->params.lacp_fast;
2726 spin_lock_bh(&bond->mode_lock);
2727 bond_for_each_slave(bond, slave, iter) {
2728 port = &(SLAVE_AD_INFO(slave)->port);
2730 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
2732 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT;
2734 spin_unlock_bh(&bond->mode_lock);
2737 size_t bond_3ad_stats_size(void)
2739 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */
2740 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */
2741 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */
2742 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */
2743 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */
2744 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */
2745 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */
2746 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */
2747 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */
2750 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)
2754 val = atomic64_read(&stats->lacpdu_rx);
2755 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,
2758 val = atomic64_read(&stats->lacpdu_tx);
2759 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,
2762 val = atomic64_read(&stats->lacpdu_unknown_rx);
2763 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,
2766 val = atomic64_read(&stats->lacpdu_illegal_rx);
2767 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,
2771 val = atomic64_read(&stats->marker_rx);
2772 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,
2775 val = atomic64_read(&stats->marker_tx);
2776 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,
2779 val = atomic64_read(&stats->marker_resp_rx);
2780 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,
2783 val = atomic64_read(&stats->marker_resp_tx);
2784 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,
2787 val = atomic64_read(&stats->marker_unknown_rx);
2788 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,