2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
23 #include <linux/skbuff.h>
24 #include <linux/if_ether.h>
25 #include <linux/netdevice.h>
26 #include <linux/spinlock.h>
27 #include <linux/ethtool.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_bonding.h>
30 #include <linux/pkt_sched.h>
31 #include <net/net_namespace.h>
35 // General definitions
36 #define AD_SHORT_TIMEOUT 1
37 #define AD_LONG_TIMEOUT 0
38 #define AD_STANDBY 0x2
39 #define AD_MAX_TX_IN_SECOND 3
40 #define AD_COLLECTOR_MAX_DELAY 0
42 // Timer definitions(43.4.4 in the 802.3ad standard)
43 #define AD_FAST_PERIODIC_TIME 1
44 #define AD_SLOW_PERIODIC_TIME 30
45 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
46 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
47 #define AD_CHURN_DETECTION_TIME 60
48 #define AD_AGGREGATE_WAIT_TIME 2
50 // Port state definitions(43.4.2.2 in the 802.3ad standard)
51 #define AD_STATE_LACP_ACTIVITY 0x1
52 #define AD_STATE_LACP_TIMEOUT 0x2
53 #define AD_STATE_AGGREGATION 0x4
54 #define AD_STATE_SYNCHRONIZATION 0x8
55 #define AD_STATE_COLLECTING 0x10
56 #define AD_STATE_DISTRIBUTING 0x20
57 #define AD_STATE_DEFAULTED 0x40
58 #define AD_STATE_EXPIRED 0x80
60 // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
61 #define AD_PORT_BEGIN 0x1
62 #define AD_PORT_LACP_ENABLED 0x2
63 #define AD_PORT_ACTOR_CHURN 0x4
64 #define AD_PORT_PARTNER_CHURN 0x8
65 #define AD_PORT_READY 0x10
66 #define AD_PORT_READY_N 0x20
67 #define AD_PORT_MATCHED 0x40
68 #define AD_PORT_STANDBY 0x80
69 #define AD_PORT_SELECTED 0x100
70 #define AD_PORT_MOVED 0x200
72 // Port Key definitions
73 // key is determined according to the link speed, duplex and
74 // user key(which is yet not supported)
75 // ------------------------------------------------------------
76 // Port key : | User key | Speed |Duplex|
77 // ------------------------------------------------------------
79 #define AD_DUPLEX_KEY_BITS 0x1
80 #define AD_SPEED_KEY_BITS 0x3E
81 #define AD_USER_KEY_BITS 0xFFC0
84 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1
85 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2
86 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4
87 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
88 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
91 // compare MAC addresses
92 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
94 static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}};
95 static u16 ad_ticks_per_sec;
96 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
98 // ================= main 802.3ad protocol functions ==================
99 static int ad_lacpdu_send(struct port *port);
100 static int ad_marker_send(struct port *port, struct bond_marker *marker);
101 static void ad_mux_machine(struct port *port);
102 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
103 static void ad_tx_machine(struct port *port);
104 static void ad_periodic_machine(struct port *port);
105 static void ad_port_selection_logic(struct port *port);
106 static void ad_agg_selection_logic(struct aggregator *aggregator);
107 static void ad_clear_agg(struct aggregator *aggregator);
108 static void ad_initialize_agg(struct aggregator *aggregator);
109 static void ad_initialize_port(struct port *port, int lacp_fast);
110 static void ad_initialize_lacpdu(struct lacpdu *Lacpdu);
111 static void ad_enable_collecting_distributing(struct port *port);
112 static void ad_disable_collecting_distributing(struct port *port);
113 static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
114 static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
117 /////////////////////////////////////////////////////////////////////////////////
118 // ================= api to bonding and kernel code ==================
119 /////////////////////////////////////////////////////////////////////////////////
122 * __get_bond_by_port - get the port's bonding struct
123 * @port: the port we're looking at
125 * Return @port's bonding struct, or %NULL if it can't be found.
127 static inline struct bonding *__get_bond_by_port(struct port *port)
129 if (port->slave == NULL) {
133 return bond_get_bond_by_slave(port->slave);
137 * __get_first_port - get the first port in the bond
138 * @bond: the bond we're looking at
140 * Return the port of the first slave in @bond, or %NULL if it can't be found.
142 static inline struct port *__get_first_port(struct bonding *bond)
144 if (bond->slave_cnt == 0) {
148 return &(SLAVE_AD_INFO(bond->first_slave).port);
152 * __get_next_port - get the next port in the bond
153 * @port: the port we're looking at
155 * Return the port of the slave that is next in line of @port's slave in the
156 * bond, or %NULL if it can't be found.
158 static inline struct port *__get_next_port(struct port *port)
160 struct bonding *bond = __get_bond_by_port(port);
161 struct slave *slave = port->slave;
163 // If there's no bond for this port, or this is the last slave
164 if ((bond == NULL) || (slave->next == bond->first_slave)) {
168 return &(SLAVE_AD_INFO(slave->next).port);
172 * __get_first_agg - get the first aggregator in the bond
173 * @bond: the bond we're looking at
175 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
178 static inline struct aggregator *__get_first_agg(struct port *port)
180 struct bonding *bond = __get_bond_by_port(port);
182 // If there's no bond for this port, or bond has no slaves
183 if ((bond == NULL) || (bond->slave_cnt == 0)) {
187 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
191 * __get_next_agg - get the next aggregator in the bond
192 * @aggregator: the aggregator we're looking at
194 * Return the aggregator of the slave that is next in line of @aggregator's
195 * slave in the bond, or %NULL if it can't be found.
197 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
199 struct slave *slave = aggregator->slave;
200 struct bonding *bond = bond_get_bond_by_slave(slave);
202 // If there's no bond for this aggregator, or this is the last slave
203 if ((bond == NULL) || (slave->next == bond->first_slave)) {
207 return &(SLAVE_AD_INFO(slave->next).aggregator);
213 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
214 * address for the partner). Return 0 if not.
216 static inline int __agg_has_partner(struct aggregator *agg)
218 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
222 * __disable_port - disable the port's slave
223 * @port: the port we're looking at
226 static inline void __disable_port(struct port *port)
228 bond_set_slave_inactive_flags(port->slave);
232 * __enable_port - enable the port's slave, if it's up
233 * @port: the port we're looking at
236 static inline void __enable_port(struct port *port)
238 struct slave *slave = port->slave;
240 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) {
241 bond_set_slave_active_flags(slave);
246 * __port_is_enabled - check if the port's slave is in active state
247 * @port: the port we're looking at
250 static inline int __port_is_enabled(struct port *port)
252 return(port->slave->state == BOND_STATE_ACTIVE);
256 * __get_agg_selection_mode - get the aggregator selection mode
257 * @port: the port we're looking at
259 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
261 static inline u32 __get_agg_selection_mode(struct port *port)
263 struct bonding *bond = __get_bond_by_port(port);
266 return BOND_AD_STABLE;
269 return BOND_AD_INFO(bond).agg_select_mode;
273 * __check_agg_selection_timer - check if the selection timer has expired
274 * @port: the port we're looking at
277 static inline int __check_agg_selection_timer(struct port *port)
279 struct bonding *bond = __get_bond_by_port(port);
285 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
289 * __get_rx_machine_lock - lock the port's RX machine
290 * @port: the port we're looking at
293 static inline void __get_rx_machine_lock(struct port *port)
295 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
299 * __release_rx_machine_lock - unlock the port's RX machine
300 * @port: the port we're looking at
303 static inline void __release_rx_machine_lock(struct port *port)
305 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
309 * __get_link_speed - get a port's speed
310 * @port: the port we're looking at
312 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
314 * %AD_LINK_SPEED_BITMASK_10MBPS,
315 * %AD_LINK_SPEED_BITMASK_100MBPS,
316 * %AD_LINK_SPEED_BITMASK_1000MBPS,
317 * %AD_LINK_SPEED_BITMASK_10000MBPS
319 static u16 __get_link_speed(struct port *port)
321 struct slave *slave = port->slave;
324 /* this if covers only a special case: when the configuration starts with
325 * link down, it sets the speed to 0.
326 * This is done in spite of the fact that the e100 driver reports 0 to be
327 * compatible with MVT in the future.*/
328 if (slave->link != BOND_LINK_UP) {
331 switch (slave->speed) {
333 speed = AD_LINK_SPEED_BITMASK_10MBPS;
337 speed = AD_LINK_SPEED_BITMASK_100MBPS;
341 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
345 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
349 speed = 0; // unknown speed value from ethtool. shouldn't happen
354 pr_debug("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed);
359 * __get_duplex - get a port's duplex
360 * @port: the port we're looking at
362 * Return @port's duplex in 802.3ad bitmask format. i.e.:
363 * 0x01 if in full duplex
366 static u8 __get_duplex(struct port *port)
368 struct slave *slave = port->slave;
372 // handling a special case: when the configuration starts with
373 // link down, it sets the duplex to 0.
374 if (slave->link != BOND_LINK_UP) {
377 switch (slave->duplex) {
380 pr_debug("Port %d Received status full duplex update from adapter\n", port->actor_port_number);
385 pr_debug("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number);
393 * __initialize_port_locks - initialize a port's RX machine spinlock
394 * @port: the port we're looking at
397 static inline void __initialize_port_locks(struct port *port)
399 // make sure it isn't called twice
400 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
406 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
407 * @timer_type: which timer to operate
408 * @par: timer parameter. see below
410 * If @timer_type is %current_while_timer, @par indicates long/short timer.
411 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
412 * %SLOW_PERIODIC_TIME.
414 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
416 u16 retval=0; //to silence the compiler
418 switch (timer_type) {
419 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
420 if (par) { // for short or long timeout
421 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
423 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
426 case AD_ACTOR_CHURN_TIMER: // for local churn machine
427 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
429 case AD_PERIODIC_TIMER: // for periodic machine
430 retval = (par*ad_ticks_per_sec); // long timeout
432 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
433 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
435 case AD_WAIT_WHILE_TIMER: // for selection machine
436 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
443 /////////////////////////////////////////////////////////////////////////////////
444 // ================= ad_rx_machine helper functions ==================
445 /////////////////////////////////////////////////////////////////////////////////
448 * __record_pdu - record parameters from a received lacpdu
449 * @lacpdu: the lacpdu we've received
450 * @port: the port we're looking at
452 * Record the parameter values for the Actor carried in a received lacpdu as
453 * the current partner operational parameter values and sets
454 * actor_oper_port_state.defaulted to FALSE.
456 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
458 if (lacpdu && port) {
459 struct port_params *partner = &port->partner_oper;
461 // record the new parameter values for the partner operational
462 partner->port_number = ntohs(lacpdu->actor_port);
463 partner->port_priority = ntohs(lacpdu->actor_port_priority);
464 partner->system = lacpdu->actor_system;
465 partner->system_priority = ntohs(lacpdu->actor_system_priority);
466 partner->key = ntohs(lacpdu->actor_key);
467 partner->port_state = lacpdu->actor_state;
469 // set actor_oper_port_state.defaulted to FALSE
470 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
472 // set the partner sync. to on if the partner is sync. and the port is matched
473 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
474 partner->port_state |= AD_STATE_SYNCHRONIZATION;
476 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
482 * __record_default - record default parameters
483 * @port: the port we're looking at
485 * This function records the default parameter values for the partner carried
486 * in the Partner Admin parameters as the current partner operational parameter
487 * values and sets actor_oper_port_state.defaulted to TRUE.
489 static void __record_default(struct port *port)
492 // record the partner admin parameters
493 memcpy(&port->partner_oper, &port->partner_admin,
494 sizeof(struct port_params));
496 // set actor_oper_port_state.defaulted to true
497 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
502 * __update_selected - update a port's Selected variable from a received lacpdu
503 * @lacpdu: the lacpdu we've received
504 * @port: the port we're looking at
506 * Update the value of the selected variable, using parameter values from a
507 * newly received lacpdu. The parameter values for the Actor carried in the
508 * received PDU are compared with the corresponding operational parameter
509 * values for the ports partner. If one or more of the comparisons shows that
510 * the value(s) received in the PDU differ from the current operational values,
511 * then selected is set to FALSE and actor_oper_port_state.synchronization is
512 * set to out_of_sync. Otherwise, selected remains unchanged.
514 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
516 if (lacpdu && port) {
517 const struct port_params *partner = &port->partner_oper;
519 // check if any parameter is different
520 if (ntohs(lacpdu->actor_port) != partner->port_number
521 || ntohs(lacpdu->actor_port_priority) != partner->port_priority
522 || MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system)
523 || ntohs(lacpdu->actor_system_priority) != partner->system_priority
524 || ntohs(lacpdu->actor_key) != partner->key
525 || (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
526 // update the state machine Selected variable
527 port->sm_vars &= ~AD_PORT_SELECTED;
533 * __update_default_selected - update a port's Selected variable from Partner
534 * @port: the port we're looking at
536 * This function updates the value of the selected variable, using the partner
537 * administrative parameter values. The administrative values are compared with
538 * the corresponding operational parameter values for the partner. If one or
539 * more of the comparisons shows that the administrative value(s) differ from
540 * the current operational values, then Selected is set to FALSE and
541 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
542 * Selected remains unchanged.
544 static void __update_default_selected(struct port *port)
547 const struct port_params *admin = &port->partner_admin;
548 const struct port_params *oper = &port->partner_oper;
550 // check if any parameter is different
551 if (admin->port_number != oper->port_number
552 || admin->port_priority != oper->port_priority
553 || MAC_ADDRESS_COMPARE(&admin->system, &oper->system)
554 || admin->system_priority != oper->system_priority
555 || admin->key != oper->key
556 || (admin->port_state & AD_STATE_AGGREGATION)
557 != (oper->port_state & AD_STATE_AGGREGATION)) {
558 // update the state machine Selected variable
559 port->sm_vars &= ~AD_PORT_SELECTED;
565 * __choose_matched - update a port's matched variable from a received lacpdu
566 * @lacpdu: the lacpdu we've received
567 * @port: the port we're looking at
569 * Update the value of the matched variable, using parameter values from a
570 * newly received lacpdu. Parameter values for the partner carried in the
571 * received PDU are compared with the corresponding operational parameter
572 * values for the actor. Matched is set to TRUE if all of these parameters
573 * match and the PDU parameter partner_state.aggregation has the same value as
574 * actor_oper_port_state.aggregation and lacp will actively maintain the link
575 * in the aggregation. Matched is also set to TRUE if the value of
576 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
577 * an individual link and lacp will actively maintain the link. Otherwise,
578 * matched is set to FALSE. LACP is considered to be actively maintaining the
579 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
580 * the actor's actor_oper_port_state.lacp_activity and the PDU's
581 * partner_state.lacp_activity variables are TRUE.
583 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
585 // validate lacpdu and port
586 if (lacpdu && port) {
587 // check if all parameters are alike
588 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
589 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
590 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
591 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
592 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
593 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
594 // or this is individual link(aggregation == FALSE)
595 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
597 // update the state machine Matched variable
598 port->sm_vars |= AD_PORT_MATCHED;
600 port->sm_vars &= ~AD_PORT_MATCHED;
606 * __update_ntt - update a port's ntt variable from a received lacpdu
607 * @lacpdu: the lacpdu we've received
608 * @port: the port we're looking at
610 * Updates the value of the ntt variable, using parameter values from a newly
611 * received lacpdu. The parameter values for the partner carried in the
612 * received PDU are compared with the corresponding operational parameter
613 * values for the Actor. If one or more of the comparisons shows that the
614 * value(s) received in the PDU differ from the current operational values,
615 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
617 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
619 // validate lacpdu and port
620 if (lacpdu && port) {
621 // check if any parameter is different
622 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
623 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
624 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
625 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
626 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
627 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
628 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
629 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
630 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
632 // set ntt to be TRUE
639 * __attach_bond_to_agg
640 * @port: the port we're looking at
642 * Handle the attaching of the port's control parser/multiplexer and the
643 * aggregator. This function does nothing since the parser/multiplexer of the
644 * receive and the parser/multiplexer of the aggregator are already combined.
646 static void __attach_bond_to_agg(struct port *port)
648 port=NULL; // just to satisfy the compiler
649 // This function does nothing since the parser/multiplexer of the receive
650 // and the parser/multiplexer of the aggregator are already combined
654 * __detach_bond_from_agg
655 * @port: the port we're looking at
657 * Handle the detaching of the port's control parser/multiplexer from the
658 * aggregator. This function does nothing since the parser/multiplexer of the
659 * receive and the parser/multiplexer of the aggregator are already combined.
661 static void __detach_bond_from_agg(struct port *port)
663 port=NULL; // just to satisfy the compiler
664 // This function does nothing sience the parser/multiplexer of the receive
665 // and the parser/multiplexer of the aggregator are already combined
669 * __agg_ports_are_ready - check if all ports in an aggregator are ready
670 * @aggregator: the aggregator we're looking at
673 static int __agg_ports_are_ready(struct aggregator *aggregator)
679 // scan all ports in this aggregator to verfy if they are all ready
680 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
681 if (!(port->sm_vars & AD_PORT_READY_N)) {
692 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
693 * @aggregator: the aggregator we're looking at
694 * @val: Should the ports' ready bit be set on or off
697 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
701 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
703 port->sm_vars |= AD_PORT_READY;
705 port->sm_vars &= ~AD_PORT_READY;
711 * __get_agg_bandwidth - get the total bandwidth of an aggregator
712 * @aggregator: the aggregator we're looking at
715 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
720 if (aggregator->num_of_ports) {
721 basic_speed = __get_link_speed(aggregator->lag_ports);
722 switch (basic_speed) {
723 case AD_LINK_SPEED_BITMASK_1MBPS:
724 bandwidth = aggregator->num_of_ports;
726 case AD_LINK_SPEED_BITMASK_10MBPS:
727 bandwidth = aggregator->num_of_ports * 10;
729 case AD_LINK_SPEED_BITMASK_100MBPS:
730 bandwidth = aggregator->num_of_ports * 100;
732 case AD_LINK_SPEED_BITMASK_1000MBPS:
733 bandwidth = aggregator->num_of_ports * 1000;
735 case AD_LINK_SPEED_BITMASK_10000MBPS:
736 bandwidth = aggregator->num_of_ports * 10000;
739 bandwidth=0; // to silent the compilor ....
746 * __get_active_agg - get the current active aggregator
747 * @aggregator: the aggregator we're looking at
750 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
752 struct aggregator *retval = NULL;
754 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
755 if (aggregator->is_active) {
765 * __update_lacpdu_from_port - update a port's lacpdu fields
766 * @port: the port we're looking at
769 static inline void __update_lacpdu_from_port(struct port *port)
771 struct lacpdu *lacpdu = &port->lacpdu;
773 /* update current actual Actor parameters */
774 /* lacpdu->subtype initialized
775 * lacpdu->version_number initialized
776 * lacpdu->tlv_type_actor_info initialized
777 * lacpdu->actor_information_length initialized
780 lacpdu->actor_system_priority = htons(port->actor_system_priority);
781 lacpdu->actor_system = port->actor_system;
782 lacpdu->actor_key = htons(port->actor_oper_port_key);
783 lacpdu->actor_port_priority = htons(port->actor_port_priority);
784 lacpdu->actor_port = htons(port->actor_port_number);
785 lacpdu->actor_state = port->actor_oper_port_state;
787 /* lacpdu->reserved_3_1 initialized
788 * lacpdu->tlv_type_partner_info initialized
789 * lacpdu->partner_information_length initialized
792 lacpdu->partner_system_priority = htons(port->partner_oper.system_priority);
793 lacpdu->partner_system = port->partner_oper.system;
794 lacpdu->partner_key = htons(port->partner_oper.key);
795 lacpdu->partner_port_priority = htons(port->partner_oper.port_priority);
796 lacpdu->partner_port = htons(port->partner_oper.port_number);
797 lacpdu->partner_state = port->partner_oper.port_state;
799 /* lacpdu->reserved_3_2 initialized
800 * lacpdu->tlv_type_collector_info initialized
801 * lacpdu->collector_information_length initialized
802 * collector_max_delay initialized
803 * reserved_12[12] initialized
804 * tlv_type_terminator initialized
805 * terminator_length initialized
806 * reserved_50[50] initialized
810 //////////////////////////////////////////////////////////////////////////////////////
811 // ================= main 802.3ad protocol code ======================================
812 //////////////////////////////////////////////////////////////////////////////////////
815 * ad_lacpdu_send - send out a lacpdu packet on a given port
816 * @port: the port we're looking at
818 * Returns: 0 on success
821 static int ad_lacpdu_send(struct port *port)
823 struct slave *slave = port->slave;
825 struct lacpdu_header *lacpdu_header;
826 int length = sizeof(struct lacpdu_header);
827 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
829 skb = dev_alloc_skb(length);
834 skb->dev = slave->dev;
835 skb_reset_mac_header(skb);
836 skb->network_header = skb->mac_header + ETH_HLEN;
837 skb->protocol = PKT_TYPE_LACPDU;
838 skb->priority = TC_PRIO_CONTROL;
840 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
842 lacpdu_header->ad_header.destination_address = lacpdu_multicast_address;
843 /* Note: source addres is set to be the member's PERMANENT address, because we use it
844 to identify loopback lacpdus in receive. */
845 lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
846 lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU;
848 lacpdu_header->lacpdu = port->lacpdu; // struct copy
856 * ad_marker_send - send marker information/response on a given port
857 * @port: the port we're looking at
858 * @marker: marker data to send
860 * Returns: 0 on success
863 static int ad_marker_send(struct port *port, struct bond_marker *marker)
865 struct slave *slave = port->slave;
867 struct bond_marker_header *marker_header;
868 int length = sizeof(struct bond_marker_header);
869 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
871 skb = dev_alloc_skb(length + 16);
876 skb_reserve(skb, 16);
878 skb->dev = slave->dev;
879 skb_reset_mac_header(skb);
880 skb->network_header = skb->mac_header + ETH_HLEN;
881 skb->protocol = PKT_TYPE_LACPDU;
883 marker_header = (struct bond_marker_header *)skb_put(skb, length);
885 marker_header->ad_header.destination_address = lacpdu_multicast_address;
886 /* Note: source addres is set to be the member's PERMANENT address, because we use it
887 to identify loopback MARKERs in receive. */
888 marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
889 marker_header->ad_header.length_type = PKT_TYPE_LACPDU;
891 marker_header->marker = *marker; // struct copy
899 * ad_mux_machine - handle a port's mux state machine
900 * @port: the port we're looking at
903 static void ad_mux_machine(struct port *port)
905 mux_states_t last_state;
907 // keep current State Machine state to compare later if it was changed
908 last_state = port->sm_mux_state;
910 if (port->sm_vars & AD_PORT_BEGIN) {
911 port->sm_mux_state = AD_MUX_DETACHED; // next state
913 switch (port->sm_mux_state) {
914 case AD_MUX_DETACHED:
915 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY
916 port->sm_mux_state = AD_MUX_WAITING; // next state
920 // if SELECTED == FALSE return to DETACH state
921 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
922 port->sm_vars &= ~AD_PORT_READY_N;
923 // in order to withhold the Selection Logic to check all ports READY_N value
924 // every callback cycle to update ready variable, we check READY_N and update READY here
925 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
926 port->sm_mux_state = AD_MUX_DETACHED; // next state
930 // check if the wait_while_timer expired
931 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) {
932 port->sm_vars |= AD_PORT_READY_N;
935 // in order to withhold the selection logic to check all ports READY_N value
936 // every callback cycle to update ready variable, we check READY_N and update READY here
937 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
939 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
940 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) {
941 port->sm_mux_state = AD_MUX_ATTACHED; // next state
944 case AD_MUX_ATTACHED:
945 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
946 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
947 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
948 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
949 port->sm_vars &= ~AD_PORT_READY_N;
950 // in order to withhold the selection logic to check all ports READY_N value
951 // every callback cycle to update ready variable, we check READY_N and update READY here
952 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
953 port->sm_mux_state = AD_MUX_DETACHED;// next state
956 case AD_MUX_COLLECTING_DISTRIBUTING:
957 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
958 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
960 port->sm_mux_state = AD_MUX_ATTACHED;// next state
963 // if port state hasn't changed make
964 // sure that a collecting distributing
965 // port in an active aggregator is enabled
966 if (port->aggregator &&
967 port->aggregator->is_active &&
968 !__port_is_enabled(port)) {
974 default: //to silence the compiler
979 // check if the state machine was changed
980 if (port->sm_mux_state != last_state) {
981 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state);
982 switch (port->sm_mux_state) {
983 case AD_MUX_DETACHED:
984 __detach_bond_from_agg(port);
985 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
986 ad_disable_collecting_distributing(port);
987 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
988 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
992 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
994 case AD_MUX_ATTACHED:
995 __attach_bond_to_agg(port);
996 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
997 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
998 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
999 ad_disable_collecting_distributing(port);
1002 case AD_MUX_COLLECTING_DISTRIBUTING:
1003 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1004 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1005 ad_enable_collecting_distributing(port);
1008 default: //to silence the compiler
1015 * ad_rx_machine - handle a port's rx State Machine
1016 * @lacpdu: the lacpdu we've received
1017 * @port: the port we're looking at
1019 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1020 * CURRENT. If timer expired set the state machine in the proper state.
1021 * In other cases, this function checks if we need to switch to other state.
1023 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1025 rx_states_t last_state;
1027 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1028 __get_rx_machine_lock(port);
1030 // keep current State Machine state to compare later if it was changed
1031 last_state = port->sm_rx_state;
1033 // check if state machine should change state
1034 // first, check if port was reinitialized
1035 if (port->sm_vars & AD_PORT_BEGIN) {
1036 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1038 // check if port is not enabled
1039 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) {
1040 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1042 // check if new lacpdu arrived
1043 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1044 port->sm_rx_timer_counter = 0; // zero timer
1045 port->sm_rx_state = AD_RX_CURRENT;
1047 // if timer is on, and if it is expired
1048 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1049 switch (port->sm_rx_state) {
1051 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1054 port->sm_rx_state = AD_RX_EXPIRED; // next state
1056 default: //to silence the compiler
1060 // if no lacpdu arrived and no timer is on
1061 switch (port->sm_rx_state) {
1062 case AD_RX_PORT_DISABLED:
1063 if (port->sm_vars & AD_PORT_MOVED) {
1064 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1065 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1066 port->sm_rx_state = AD_RX_EXPIRED; // next state
1067 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) {
1068 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1071 default: //to silence the compiler
1078 // check if the State machine was changed or new lacpdu arrived
1079 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1080 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state);
1081 switch (port->sm_rx_state) {
1082 case AD_RX_INITIALIZE:
1083 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1084 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1086 port->sm_vars |= AD_PORT_LACP_ENABLED;
1088 port->sm_vars &= ~AD_PORT_SELECTED;
1089 __record_default(port);
1090 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1091 port->sm_vars &= ~AD_PORT_MOVED;
1092 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1094 /*- Fall Through -*/
1096 case AD_RX_PORT_DISABLED:
1097 port->sm_vars &= ~AD_PORT_MATCHED;
1099 case AD_RX_LACP_DISABLED:
1100 port->sm_vars &= ~AD_PORT_SELECTED;
1101 __record_default(port);
1102 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1103 port->sm_vars |= AD_PORT_MATCHED;
1104 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1107 //Reset of the Synchronization flag. (Standard 43.4.12)
1108 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1109 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1110 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1111 port->sm_vars &= ~AD_PORT_MATCHED;
1112 port->partner_oper.port_state |= AD_SHORT_TIMEOUT;
1113 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1114 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1116 case AD_RX_DEFAULTED:
1117 __update_default_selected(port);
1118 __record_default(port);
1119 port->sm_vars |= AD_PORT_MATCHED;
1120 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1123 // detect loopback situation
1124 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1125 // INFO_RECEIVED_LOOPBACK_FRAMES
1126 printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on "
1127 "adapter (%s). Check the configuration to verify that all "
1128 "Adapters are connected to 802.3ad compliant switch ports\n",
1129 port->slave->dev->master->name, port->slave->dev->name);
1130 __release_rx_machine_lock(port);
1133 __update_selected(lacpdu, port);
1134 __update_ntt(lacpdu, port);
1135 __record_pdu(lacpdu, port);
1136 __choose_matched(lacpdu, port);
1137 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1138 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1139 // verify that if the aggregator is enabled, the port is enabled too.
1140 //(because if the link goes down for a short time, the 802.3ad will not
1141 // catch it, and the port will continue to be disabled)
1142 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) {
1143 __enable_port(port);
1146 default: //to silence the compiler
1150 __release_rx_machine_lock(port);
1154 * ad_tx_machine - handle a port's tx state machine
1155 * @port: the port we're looking at
1158 static void ad_tx_machine(struct port *port)
1160 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1161 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1162 // check if there is something to send
1163 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1164 __update_lacpdu_from_port(port);
1166 if (ad_lacpdu_send(port) >= 0) {
1167 pr_debug("Sent LACPDU on port %d\n", port->actor_port_number);
1168 // mark ntt as false, so it will not be sent again until demanded
1172 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1173 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1178 * ad_periodic_machine - handle a port's periodic state machine
1179 * @port: the port we're looking at
1181 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1183 static void ad_periodic_machine(struct port *port)
1185 periodic_states_t last_state;
1187 // keep current state machine state to compare later if it was changed
1188 last_state = port->sm_periodic_state;
1190 // check if port was reinitialized
1191 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1192 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1194 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1196 // check if state machine should change state
1197 else if (port->sm_periodic_timer_counter) {
1198 // check if periodic state machine expired
1199 if (!(--port->sm_periodic_timer_counter)) {
1200 // if expired then do tx
1201 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1203 // If not expired, check if there is some new timeout parameter from the partner state
1204 switch (port->sm_periodic_state) {
1205 case AD_FAST_PERIODIC:
1206 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1207 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1210 case AD_SLOW_PERIODIC:
1211 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1212 // stop current timer
1213 port->sm_periodic_timer_counter = 0;
1214 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1217 default: //to silence the compiler
1222 switch (port->sm_periodic_state) {
1223 case AD_NO_PERIODIC:
1224 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1226 case AD_PERIODIC_TX:
1227 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1228 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1230 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1233 default: //to silence the compiler
1238 // check if the state machine was changed
1239 if (port->sm_periodic_state != last_state) {
1240 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state);
1241 switch (port->sm_periodic_state) {
1242 case AD_NO_PERIODIC:
1243 port->sm_periodic_timer_counter = 0; // zero timer
1245 case AD_FAST_PERIODIC:
1246 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1248 case AD_SLOW_PERIODIC:
1249 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1251 case AD_PERIODIC_TX:
1254 default: //to silence the compiler
1261 * ad_port_selection_logic - select aggregation groups
1262 * @port: the port we're looking at
1264 * Select aggregation groups, and assign each port for it's aggregetor. The
1265 * selection logic is called in the inititalization (after all the handshkes),
1266 * and after every lacpdu receive (if selected is off).
1268 static void ad_port_selection_logic(struct port *port)
1270 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1271 struct port *last_port = NULL, *curr_port;
1274 // if the port is already Selected, do nothing
1275 if (port->sm_vars & AD_PORT_SELECTED) {
1279 // if the port is connected to other aggregator, detach it
1280 if (port->aggregator) {
1281 // detach the port from its former aggregator
1282 temp_aggregator=port->aggregator;
1283 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) {
1284 if (curr_port == port) {
1285 temp_aggregator->num_of_ports--;
1286 if (!last_port) {// if it is the first port attached to the aggregator
1287 temp_aggregator->lag_ports=port->next_port_in_aggregator;
1288 } else {// not the first port attached to the aggregator
1289 last_port->next_port_in_aggregator=port->next_port_in_aggregator;
1292 // clear the port's relations to this aggregator
1293 port->aggregator = NULL;
1294 port->next_port_in_aggregator=NULL;
1295 port->actor_port_aggregator_identifier=0;
1297 pr_debug("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier);
1298 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1299 if (!temp_aggregator->lag_ports) {
1300 ad_clear_agg(temp_aggregator);
1305 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1306 printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was "
1307 "related to aggregator %d but was not on its port list\n",
1308 port->slave->dev->master->name,
1309 port->actor_port_number, port->slave->dev->name,
1310 port->aggregator->aggregator_identifier);
1313 // search on all aggregators for a suitable aggregator for this port
1314 for (aggregator = __get_first_agg(port); aggregator;
1315 aggregator = __get_next_agg(aggregator)) {
1317 // keep a free aggregator for later use(if needed)
1318 if (!aggregator->lag_ports) {
1319 if (!free_aggregator) {
1320 free_aggregator=aggregator;
1324 // check if current aggregator suits us
1325 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1326 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1327 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1328 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1330 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1331 !aggregator->is_individual) // but is not individual OR
1334 // attach to the founded aggregator
1335 port->aggregator = aggregator;
1336 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1337 port->next_port_in_aggregator=aggregator->lag_ports;
1338 port->aggregator->num_of_ports++;
1339 aggregator->lag_ports=port;
1340 pr_debug("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1342 // mark this port as selected
1343 port->sm_vars |= AD_PORT_SELECTED;
1349 // the port couldn't find an aggregator - attach it to a new aggregator
1351 if (free_aggregator) {
1352 // assign port a new aggregator
1353 port->aggregator = free_aggregator;
1354 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1356 // update the new aggregator's parameters
1357 // if port was responsed from the end-user
1358 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex
1359 port->aggregator->is_individual = 0;
1361 port->aggregator->is_individual = 1;
1364 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1365 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1366 port->aggregator->partner_system=port->partner_oper.system;
1367 port->aggregator->partner_system_priority = port->partner_oper.system_priority;
1368 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1369 port->aggregator->receive_state = 1;
1370 port->aggregator->transmit_state = 1;
1371 port->aggregator->lag_ports = port;
1372 port->aggregator->num_of_ports++;
1374 // mark this port as selected
1375 port->sm_vars |= AD_PORT_SELECTED;
1377 pr_debug("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1379 printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n",
1380 port->slave->dev->master->name,
1381 port->actor_port_number, port->slave->dev->name);
1384 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1385 // else set ready=FALSE in all aggregator's ports
1386 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1388 aggregator = __get_first_agg(port);
1389 ad_agg_selection_logic(aggregator);
1393 * Decide if "agg" is a better choice for the new active aggregator that
1394 * the current best, according to the ad_select policy.
1396 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1397 struct aggregator *curr)
1400 * 0. If no best, select current.
1402 * 1. If the current agg is not individual, and the best is
1403 * individual, select current.
1405 * 2. If current agg is individual and the best is not, keep best.
1407 * 3. Therefore, current and best are both individual or both not
1410 * 3a. If current agg partner replied, and best agg partner did not,
1413 * 3b. If current agg partner did not reply and best agg partner
1414 * did reply, keep best.
1416 * 4. Therefore, current and best both have partner replies or
1417 * both do not, so perform selection policy:
1419 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1420 * select by bandwidth.
1422 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1427 if (!curr->is_individual && best->is_individual)
1430 if (curr->is_individual && !best->is_individual)
1433 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1436 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1439 switch (__get_agg_selection_mode(curr->lag_ports)) {
1441 if (curr->num_of_ports > best->num_of_ports)
1444 if (curr->num_of_ports < best->num_of_ports)
1448 case BOND_AD_STABLE:
1449 case BOND_AD_BANDWIDTH:
1450 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1456 printk(KERN_WARNING DRV_NAME
1457 ": %s: Impossible agg select mode %d\n",
1458 curr->slave->dev->master->name,
1459 __get_agg_selection_mode(curr->lag_ports));
1467 * ad_agg_selection_logic - select an aggregation group for a team
1468 * @aggregator: the aggregator we're looking at
1470 * It is assumed that only one aggregator may be selected for a team.
1472 * The logic of this function is to select the aggregator according to
1473 * the ad_select policy:
1475 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1476 * it, and to reselect the active aggregator only if the previous
1477 * aggregator has no more ports related to it.
1479 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1480 * bandwidth, and reselect whenever a link state change takes place or the
1481 * set of slaves in the bond changes.
1483 * BOND_AD_COUNT: select the aggregator with largest number of ports
1484 * (slaves), and reselect whenever a link state change takes place or the
1485 * set of slaves in the bond changes.
1487 * FIXME: this function MUST be called with the first agg in the bond, or
1488 * __get_active_agg() won't work correctly. This function should be better
1489 * called with the bond itself, and retrieve the first agg from it.
1491 static void ad_agg_selection_logic(struct aggregator *agg)
1493 struct aggregator *best, *active, *origin;
1498 active = __get_active_agg(agg);
1504 if (agg->num_of_ports)
1505 best = ad_agg_selection_test(best, agg);
1507 } while ((agg = __get_next_agg(agg)));
1510 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1512 * For the STABLE policy, don't replace the old active
1513 * aggregator if it's still active (it has an answering
1514 * partner) or if both the best and active don't have an
1515 * answering partner.
1517 if (active && active->lag_ports &&
1518 active->lag_ports->is_enabled &&
1519 (__agg_has_partner(active) ||
1520 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1521 if (!(!active->actor_oper_aggregator_key &&
1522 best->actor_oper_aggregator_key)) {
1524 active->is_active = 1;
1529 if (best && (best == active)) {
1531 active->is_active = 1;
1534 // if there is new best aggregator, activate it
1536 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1537 best->aggregator_identifier, best->num_of_ports,
1538 best->actor_oper_aggregator_key,
1539 best->partner_oper_aggregator_key,
1540 best->is_individual, best->is_active);
1541 pr_debug("best ports %p slave %p %s\n",
1542 best->lag_ports, best->slave,
1543 best->slave ? best->slave->dev->name : "NULL");
1545 for (agg = __get_first_agg(best->lag_ports); agg;
1546 agg = __get_next_agg(agg)) {
1548 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1549 agg->aggregator_identifier, agg->num_of_ports,
1550 agg->actor_oper_aggregator_key,
1551 agg->partner_oper_aggregator_key,
1552 agg->is_individual, agg->is_active);
1555 // check if any partner replys
1556 if (best->is_individual) {
1557 printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad"
1558 " response from the link partner for any"
1559 " adapters in the bond\n",
1560 best->slave->dev->master->name);
1563 best->is_active = 1;
1564 pr_debug("LAG %d chosen as the active LAG\n",
1565 best->aggregator_identifier);
1566 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1567 best->aggregator_identifier, best->num_of_ports,
1568 best->actor_oper_aggregator_key,
1569 best->partner_oper_aggregator_key,
1570 best->is_individual, best->is_active);
1572 // disable the ports that were related to the former active_aggregator
1574 for (port = active->lag_ports; port;
1575 port = port->next_port_in_aggregator) {
1576 __disable_port(port);
1582 * if the selected aggregator is of join individuals
1583 * (partner_system is NULL), enable their ports
1585 active = __get_active_agg(origin);
1588 if (!__agg_has_partner(active)) {
1589 for (port = active->lag_ports; port;
1590 port = port->next_port_in_aggregator) {
1591 __enable_port(port);
1596 if (origin->slave) {
1597 struct bonding *bond;
1599 bond = bond_get_bond_by_slave(origin->slave);
1601 bond_3ad_set_carrier(bond);
1606 * ad_clear_agg - clear a given aggregator's parameters
1607 * @aggregator: the aggregator we're looking at
1610 static void ad_clear_agg(struct aggregator *aggregator)
1613 aggregator->is_individual = 0;
1614 aggregator->actor_admin_aggregator_key = 0;
1615 aggregator->actor_oper_aggregator_key = 0;
1616 aggregator->partner_system = null_mac_addr;
1617 aggregator->partner_system_priority = 0;
1618 aggregator->partner_oper_aggregator_key = 0;
1619 aggregator->receive_state = 0;
1620 aggregator->transmit_state = 0;
1621 aggregator->lag_ports = NULL;
1622 aggregator->is_active = 0;
1623 aggregator->num_of_ports = 0;
1624 pr_debug("LAG %d was cleared\n", aggregator->aggregator_identifier);
1629 * ad_initialize_agg - initialize a given aggregator's parameters
1630 * @aggregator: the aggregator we're looking at
1633 static void ad_initialize_agg(struct aggregator *aggregator)
1636 ad_clear_agg(aggregator);
1638 aggregator->aggregator_mac_address = null_mac_addr;
1639 aggregator->aggregator_identifier = 0;
1640 aggregator->slave = NULL;
1645 * ad_initialize_port - initialize a given port's parameters
1646 * @aggregator: the aggregator we're looking at
1647 * @lacp_fast: boolean. whether fast periodic should be used
1650 static void ad_initialize_port(struct port *port, int lacp_fast)
1652 static const struct port_params tmpl = {
1653 .system_priority = 0xffff,
1656 .port_priority = 0xff,
1661 port->actor_port_number = 1;
1662 port->actor_port_priority = 0xff;
1663 port->actor_system = null_mac_addr;
1664 port->actor_system_priority = 0xffff;
1665 port->actor_port_aggregator_identifier = 0;
1667 port->actor_admin_port_key = 1;
1668 port->actor_oper_port_key = 1;
1669 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1670 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1673 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1676 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1677 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1679 port->is_enabled = 1;
1680 // ****** private parameters ******
1681 port->sm_vars = 0x3;
1682 port->sm_rx_state = 0;
1683 port->sm_rx_timer_counter = 0;
1684 port->sm_periodic_state = 0;
1685 port->sm_periodic_timer_counter = 0;
1686 port->sm_mux_state = 0;
1687 port->sm_mux_timer_counter = 0;
1688 port->sm_tx_state = 0;
1689 port->sm_tx_timer_counter = 0;
1691 port->aggregator = NULL;
1692 port->next_port_in_aggregator = NULL;
1693 port->transaction_id = 0;
1695 ad_initialize_lacpdu(&(port->lacpdu));
1700 * ad_enable_collecting_distributing - enable a port's transmit/receive
1701 * @port: the port we're looking at
1703 * Enable @port if it's in an active aggregator
1705 static void ad_enable_collecting_distributing(struct port *port)
1707 if (port->aggregator->is_active) {
1708 pr_debug("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1709 __enable_port(port);
1714 * ad_disable_collecting_distributing - disable a port's transmit/receive
1715 * @port: the port we're looking at
1718 static void ad_disable_collecting_distributing(struct port *port)
1720 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
1721 pr_debug("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1722 __disable_port(port);
1728 * ad_marker_info_send - send a marker information frame
1729 * @port: the port we're looking at
1731 * This function does nothing since we decided not to implement send and handle
1732 * response for marker PDU's, in this stage, but only to respond to marker
1735 static void ad_marker_info_send(struct port *port)
1737 struct bond_marker marker;
1740 // fill the marker PDU with the appropriate values
1741 marker.subtype = 0x02;
1742 marker.version_number = 0x01;
1743 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1744 marker.marker_length = 0x16;
1745 // convert requester_port to Big Endian
1746 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1747 marker.requester_system = port->actor_system;
1748 // convert requester_port(u32) to Big Endian
1749 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24));
1751 marker.tlv_type_terminator = 0x00;
1752 marker.terminator_length = 0x00;
1753 for (index=0; index<90; index++) {
1754 marker.reserved_90[index]=0;
1757 // send the marker information
1758 if (ad_marker_send(port, &marker) >= 0) {
1759 pr_debug("Sent Marker Information on port %d\n", port->actor_port_number);
1765 * ad_marker_info_received - handle receive of a Marker information frame
1766 * @marker_info: Marker info received
1767 * @port: the port we're looking at
1770 static void ad_marker_info_received(struct bond_marker *marker_info,
1773 struct bond_marker marker;
1775 // copy the received marker data to the response marker
1776 //marker = *marker_info;
1777 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1778 // change the marker subtype to marker response
1779 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE;
1780 // send the marker response
1782 if (ad_marker_send(port, &marker) >= 0) {
1783 pr_debug("Sent Marker Response on port %d\n", port->actor_port_number);
1788 * ad_marker_response_received - handle receive of a marker response frame
1789 * @marker: marker PDU received
1790 * @port: the port we're looking at
1792 * This function does nothing since we decided not to implement send and handle
1793 * response for marker PDU's, in this stage, but only to respond to marker
1796 static void ad_marker_response_received(struct bond_marker *marker,
1799 marker=NULL; // just to satisfy the compiler
1800 port=NULL; // just to satisfy the compiler
1801 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1805 * ad_initialize_lacpdu - initialize a given lacpdu structure
1806 * @lacpdu: lacpdu structure to initialize
1809 static void ad_initialize_lacpdu(struct lacpdu *lacpdu)
1813 // initialize lacpdu data
1814 lacpdu->subtype = 0x01;
1815 lacpdu->version_number = 0x01;
1816 lacpdu->tlv_type_actor_info = 0x01;
1817 lacpdu->actor_information_length = 0x14;
1818 // lacpdu->actor_system_priority updated on send
1819 // lacpdu->actor_system updated on send
1820 // lacpdu->actor_key updated on send
1821 // lacpdu->actor_port_priority updated on send
1822 // lacpdu->actor_port updated on send
1823 // lacpdu->actor_state updated on send
1824 lacpdu->tlv_type_partner_info = 0x02;
1825 lacpdu->partner_information_length = 0x14;
1826 for (index=0; index<=2; index++) {
1827 lacpdu->reserved_3_1[index]=0;
1829 // lacpdu->partner_system_priority updated on send
1830 // lacpdu->partner_system updated on send
1831 // lacpdu->partner_key updated on send
1832 // lacpdu->partner_port_priority updated on send
1833 // lacpdu->partner_port updated on send
1834 // lacpdu->partner_state updated on send
1835 for (index=0; index<=2; index++) {
1836 lacpdu->reserved_3_2[index]=0;
1838 lacpdu->tlv_type_collector_info = 0x03;
1839 lacpdu->collector_information_length= 0x10;
1840 lacpdu->collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY);
1841 for (index=0; index<=11; index++) {
1842 lacpdu->reserved_12[index]=0;
1844 lacpdu->tlv_type_terminator = 0x00;
1845 lacpdu->terminator_length = 0;
1846 for (index=0; index<=49; index++) {
1847 lacpdu->reserved_50[index]=0;
1851 //////////////////////////////////////////////////////////////////////////////////////
1852 // ================= AD exported functions to the main bonding code ==================
1853 //////////////////////////////////////////////////////////////////////////////////////
1855 // Check aggregators status in team every T seconds
1856 #define AD_AGGREGATOR_SELECTION_TIMER 8
1859 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1861 * Set the aggregation selection timer, to initiate an agg selection in
1862 * the very near future. Called during first initialization, and during
1863 * any down to up transitions of the bond.
1865 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1867 BOND_AD_INFO(bond).agg_select_timer = timeout;
1868 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select;
1871 static u16 aggregator_identifier;
1874 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1875 * @bond: bonding struct to work on
1876 * @tick_resolution: tick duration (millisecond resolution)
1877 * @lacp_fast: boolean. whether fast periodic should be used
1879 * Can be called only after the mac address of the bond is set.
1881 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
1883 // check that the bond is not initialized yet
1884 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) {
1886 aggregator_identifier = 0;
1888 BOND_AD_INFO(bond).lacp_fast = lacp_fast;
1889 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1890 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1892 // initialize how many times this module is called in one second(should be about every 100ms)
1893 ad_ticks_per_sec = tick_resolution;
1895 bond_3ad_initiate_agg_selection(bond,
1896 AD_AGGREGATOR_SELECTION_TIMER *
1902 * bond_3ad_bind_slave - initialize a slave's port
1903 * @slave: slave struct to work on
1905 * Returns: 0 on success
1908 int bond_3ad_bind_slave(struct slave *slave)
1910 struct bonding *bond = bond_get_bond_by_slave(slave);
1912 struct aggregator *aggregator;
1915 printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n",
1916 slave->dev->master->name, slave->dev->name);
1920 //check that the slave has not been intialized yet.
1921 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1923 // port initialization
1924 port = &(SLAVE_AD_INFO(slave).port);
1926 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
1928 port->slave = slave;
1929 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1930 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1931 // ------------------------------------------------------------
1932 // Port key : | User key | Speed |Duplex|
1933 // ------------------------------------------------------------
1935 port->actor_admin_port_key = 0; // initialize this parameter
1936 port->actor_admin_port_key |= __get_duplex(port);
1937 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1938 port->actor_oper_port_key = port->actor_admin_port_key;
1939 // if the port is not full duplex, then the port should be not lacp Enabled
1940 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1941 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1943 // actor system is the bond's system
1944 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1945 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1946 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1947 port->aggregator = NULL;
1948 port->next_port_in_aggregator = NULL;
1950 __disable_port(port);
1951 __initialize_port_locks(port);
1954 // aggregator initialization
1955 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1957 ad_initialize_agg(aggregator);
1959 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1960 aggregator->aggregator_identifier = (++aggregator_identifier);
1961 aggregator->slave = slave;
1962 aggregator->is_active = 0;
1963 aggregator->num_of_ports = 0;
1970 * bond_3ad_unbind_slave - deinitialize a slave's port
1971 * @slave: slave struct to work on
1973 * Search for the aggregator that is related to this port, remove the
1974 * aggregator and assign another aggregator for other port related to it
1975 * (if any), and remove the port.
1977 void bond_3ad_unbind_slave(struct slave *slave)
1979 struct port *port, *prev_port, *temp_port;
1980 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1981 int select_new_active_agg = 0;
1983 // find the aggregator related to this slave
1984 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1986 // find the port related to this slave
1987 port = &(SLAVE_AD_INFO(slave).port);
1989 // if slave is null, the whole port is not initialized
1991 printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to "
1992 "unbind an uninitialized port on %s\n",
1993 slave->dev->master->name, slave->dev->name);
1997 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier);
1999 /* Tell the partner that this port is not suitable for aggregation */
2000 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2001 __update_lacpdu_from_port(port);
2002 ad_lacpdu_send(port);
2004 // check if this aggregator is occupied
2005 if (aggregator->lag_ports) {
2006 // check if there are other ports related to this aggregator except
2007 // the port related to this slave(thats ensure us that there is a
2008 // reason to search for new aggregator, and that we will find one
2009 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2010 // find new aggregator for the related port(s)
2011 new_aggregator = __get_first_agg(port);
2012 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
2013 // if the new aggregator is empty, or it connected to to our port only
2014 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) {
2018 // if new aggregator found, copy the aggregator's parameters
2019 // and connect the related lag_ports to the new aggregator
2020 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2021 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier);
2023 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
2024 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2025 aggregator->slave->dev->master->name);
2026 // select new active aggregator
2027 select_new_active_agg = 1;
2030 new_aggregator->is_individual = aggregator->is_individual;
2031 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2032 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2033 new_aggregator->partner_system = aggregator->partner_system;
2034 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2035 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2036 new_aggregator->receive_state = aggregator->receive_state;
2037 new_aggregator->transmit_state = aggregator->transmit_state;
2038 new_aggregator->lag_ports = aggregator->lag_ports;
2039 new_aggregator->is_active = aggregator->is_active;
2040 new_aggregator->num_of_ports = aggregator->num_of_ports;
2042 // update the information that is written on the ports about the aggregator
2043 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) {
2044 temp_port->aggregator=new_aggregator;
2045 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2048 // clear the aggregator
2049 ad_clear_agg(aggregator);
2051 if (select_new_active_agg) {
2052 ad_agg_selection_logic(__get_first_agg(port));
2055 printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, "
2056 "and could not find a new aggregator for its ports\n",
2057 slave->dev->master->name);
2059 } else { // in case that the only port related to this aggregator is the one we want to remove
2060 select_new_active_agg = aggregator->is_active;
2061 // clear the aggregator
2062 ad_clear_agg(aggregator);
2063 if (select_new_active_agg) {
2064 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2065 slave->dev->master->name);
2066 // select new active aggregator
2067 ad_agg_selection_logic(__get_first_agg(port));
2072 pr_debug("Unbinding port %d\n", port->actor_port_number);
2073 // find the aggregator that this port is connected to
2074 temp_aggregator = __get_first_agg(port);
2075 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2077 // search the port in the aggregator's related ports
2078 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) {
2079 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
2081 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2083 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2085 temp_aggregator->num_of_ports--;
2086 if (temp_aggregator->num_of_ports==0) {
2087 select_new_active_agg = temp_aggregator->is_active;
2088 // clear the aggregator
2089 ad_clear_agg(temp_aggregator);
2090 if (select_new_active_agg) {
2091 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2092 slave->dev->master->name);
2093 // select new active aggregator
2094 ad_agg_selection_logic(__get_first_agg(port));
2105 * bond_3ad_state_machine_handler - handle state machines timeout
2106 * @bond: bonding struct to work on
2108 * The state machine handling concept in this module is to check every tick
2109 * which state machine should operate any function. The execution order is
2110 * round robin, so when we have an interaction between state machines, the
2111 * reply of one to each other might be delayed until next tick.
2113 * This function also complete the initialization when the agg_select_timer
2114 * times out, and it selects an aggregator for the ports that are yet not
2115 * related to any aggregator, and selects the active aggregator for a bond.
2117 void bond_3ad_state_machine_handler(struct work_struct *work)
2119 struct bonding *bond = container_of(work, struct bonding,
2122 struct aggregator *aggregator;
2124 read_lock(&bond->lock);
2126 if (bond->kill_timers) {
2130 //check if there are any slaves
2131 if (bond->slave_cnt == 0) {
2135 // check if agg_select_timer timer after initialize is timed out
2136 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2137 // select the active aggregator for the bond
2138 if ((port = __get_first_port(bond))) {
2140 printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is "
2141 "uninitialized\n", bond->dev->name);
2145 aggregator = __get_first_agg(port);
2146 ad_agg_selection_logic(aggregator);
2148 bond_3ad_set_carrier(bond);
2151 // for each port run the state machines
2152 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2154 printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized "
2155 "port\n", bond->dev->name);
2159 ad_rx_machine(NULL, port);
2160 ad_periodic_machine(port);
2161 ad_port_selection_logic(port);
2162 ad_mux_machine(port);
2163 ad_tx_machine(port);
2165 // turn off the BEGIN bit, since we already handled it
2166 if (port->sm_vars & AD_PORT_BEGIN) {
2167 port->sm_vars &= ~AD_PORT_BEGIN;
2172 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2174 read_unlock(&bond->lock);
2178 * bond_3ad_rx_indication - handle a received frame
2179 * @lacpdu: received lacpdu
2180 * @slave: slave struct to work on
2181 * @length: length of the data received
2183 * It is assumed that frames that were sent on this NIC don't returned as new
2184 * received frames (loopback). Since only the payload is given to this
2185 * function, it check for loopback.
2187 static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2191 if (length >= sizeof(struct lacpdu)) {
2193 port = &(SLAVE_AD_INFO(slave).port);
2196 printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is "
2197 "uninitialized\n", slave->dev->name, slave->dev->master->name);
2201 switch (lacpdu->subtype) {
2202 case AD_TYPE_LACPDU:
2203 pr_debug("Received LACPDU on port %d\n", port->actor_port_number);
2204 ad_rx_machine(lacpdu, port);
2207 case AD_TYPE_MARKER:
2208 // No need to convert fields to Little Endian since we don't use the marker's fields.
2210 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2211 case AD_MARKER_INFORMATION_SUBTYPE:
2212 pr_debug("Received Marker Information on port %d\n", port->actor_port_number);
2213 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2216 case AD_MARKER_RESPONSE_SUBTYPE:
2217 pr_debug("Received Marker Response on port %d\n", port->actor_port_number);
2218 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2222 pr_debug("Received an unknown Marker subtype on slot %d\n", port->actor_port_number);
2229 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2230 * @slave: slave struct to work on
2232 * Handle reselection of aggregator (if needed) for this port.
2234 void bond_3ad_adapter_speed_changed(struct slave *slave)
2238 port = &(SLAVE_AD_INFO(slave).port);
2240 // if slave is null, the whole port is not initialized
2242 printk(KERN_WARNING DRV_NAME ": Warning: %s: speed "
2243 "changed for uninitialized port on %s\n",
2244 slave->dev->master->name, slave->dev->name);
2248 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2249 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2250 pr_debug("Port %d changed speed\n", port->actor_port_number);
2251 // there is no need to reselect a new aggregator, just signal the
2252 // state machines to reinitialize
2253 port->sm_vars |= AD_PORT_BEGIN;
2257 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2258 * @slave: slave struct to work on
2260 * Handle reselection of aggregator (if needed) for this port.
2262 void bond_3ad_adapter_duplex_changed(struct slave *slave)
2266 port=&(SLAVE_AD_INFO(slave).port);
2268 // if slave is null, the whole port is not initialized
2270 printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed "
2271 "for uninitialized port on %s\n",
2272 slave->dev->master->name, slave->dev->name);
2276 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2277 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2278 pr_debug("Port %d changed duplex\n", port->actor_port_number);
2279 // there is no need to reselect a new aggregator, just signal the
2280 // state machines to reinitialize
2281 port->sm_vars |= AD_PORT_BEGIN;
2285 * bond_3ad_handle_link_change - handle a slave's link status change indication
2286 * @slave: slave struct to work on
2287 * @status: whether the link is now up or down
2289 * Handle reselection of aggregator (if needed) for this port.
2291 void bond_3ad_handle_link_change(struct slave *slave, char link)
2295 port = &(SLAVE_AD_INFO(slave).port);
2297 // if slave is null, the whole port is not initialized
2299 printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for "
2300 "uninitialized port on %s\n",
2301 slave->dev->master->name, slave->dev->name);
2305 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
2306 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2307 if (link == BOND_LINK_UP) {
2308 port->is_enabled = 1;
2309 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2310 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2311 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2312 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2314 /* link has failed */
2315 port->is_enabled = 0;
2316 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2317 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS);
2319 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2320 // there is no need to reselect a new aggregator, just signal the
2321 // state machines to reinitialize
2322 port->sm_vars |= AD_PORT_BEGIN;
2326 * set link state for bonding master: if we have an active
2327 * aggregator, we're up, if not, we're down. Presumes that we cannot
2328 * have an active aggregator if there are no slaves with link up.
2330 * This behavior complies with IEEE 802.3 section 43.3.9.
2332 * Called by bond_set_carrier(). Return zero if carrier state does not
2333 * change, nonzero if it does.
2335 int bond_3ad_set_carrier(struct bonding *bond)
2337 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
2338 if (!netif_carrier_ok(bond->dev)) {
2339 netif_carrier_on(bond->dev);
2345 if (netif_carrier_ok(bond->dev)) {
2346 netif_carrier_off(bond->dev);
2353 * bond_3ad_get_active_agg_info - get information of the active aggregator
2354 * @bond: bonding struct to work on
2355 * @ad_info: ad_info struct to fill with the bond's info
2357 * Returns: 0 on success
2360 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2362 struct aggregator *aggregator = NULL;
2365 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2366 if (port->aggregator && port->aggregator->is_active) {
2367 aggregator = port->aggregator;
2373 ad_info->aggregator_id = aggregator->aggregator_identifier;
2374 ad_info->ports = aggregator->num_of_ports;
2375 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2376 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2377 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2384 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2386 struct slave *slave, *start_at;
2387 struct bonding *bond = netdev_priv(dev);
2392 struct ad_info ad_info;
2395 /* make sure that the slaves list will
2396 * not change during tx
2398 read_lock(&bond->lock);
2400 if (!BOND_IS_OK(bond)) {
2404 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
2405 printk(KERN_DEBUG DRV_NAME ": %s: Error: "
2406 "bond_3ad_get_active_agg_info failed\n", dev->name);
2410 slaves_in_agg = ad_info.ports;
2411 agg_id = ad_info.aggregator_id;
2413 if (slaves_in_agg == 0) {
2414 /*the aggregator is empty*/
2415 printk(KERN_DEBUG DRV_NAME ": %s: Error: active "
2416 "aggregator is empty\n",
2421 slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg);
2423 bond_for_each_slave(bond, slave, i) {
2424 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2426 if (agg && (agg->aggregator_identifier == agg_id)) {
2428 if (slave_agg_no < 0) {
2434 if (slave_agg_no >= 0) {
2435 printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on "
2436 "for aggregator ID %d\n", dev->name, agg_id);
2442 bond_for_each_slave_from(bond, slave, i, start_at) {
2443 int slave_agg_id = 0;
2444 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2447 slave_agg_id = agg->aggregator_identifier;
2450 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2451 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2458 /* no suitable interface, frame not sent */
2461 read_unlock(&bond->lock);
2465 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev)
2467 struct bonding *bond = netdev_priv(dev);
2468 struct slave *slave = NULL;
2469 int ret = NET_RX_DROP;
2471 if (dev_net(dev) != &init_net)
2474 if (!(dev->flags & IFF_MASTER))
2477 read_lock(&bond->lock);
2478 slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev),
2483 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
2485 ret = NET_RX_SUCCESS;
2488 read_unlock(&bond->lock);