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 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
100 // ================= main 802.3ad protocol functions ==================
101 static int ad_lacpdu_send(struct port *port);
102 static int ad_marker_send(struct port *port, struct bond_marker *marker);
103 static void ad_mux_machine(struct port *port);
104 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
105 static void ad_tx_machine(struct port *port);
106 static void ad_periodic_machine(struct port *port);
107 static void ad_port_selection_logic(struct port *port);
108 static void ad_agg_selection_logic(struct aggregator *aggregator);
109 static void ad_clear_agg(struct aggregator *aggregator);
110 static void ad_initialize_agg(struct aggregator *aggregator);
111 static void ad_initialize_port(struct port *port, int lacp_fast);
112 static void ad_enable_collecting_distributing(struct port *port);
113 static void ad_disable_collecting_distributing(struct port *port);
114 static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
115 static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
118 /////////////////////////////////////////////////////////////////////////////////
119 // ================= api to bonding and kernel code ==================
120 /////////////////////////////////////////////////////////////////////////////////
123 * __get_bond_by_port - get the port's bonding struct
124 * @port: the port we're looking at
126 * Return @port's bonding struct, or %NULL if it can't be found.
128 static inline struct bonding *__get_bond_by_port(struct port *port)
130 if (port->slave == NULL) {
134 return bond_get_bond_by_slave(port->slave);
138 * __get_first_port - get the first port in the bond
139 * @bond: the bond we're looking at
141 * Return the port of the first slave in @bond, or %NULL if it can't be found.
143 static inline struct port *__get_first_port(struct bonding *bond)
145 if (bond->slave_cnt == 0) {
149 return &(SLAVE_AD_INFO(bond->first_slave).port);
153 * __get_next_port - get the next port in the bond
154 * @port: the port we're looking at
156 * Return the port of the slave that is next in line of @port's slave in the
157 * bond, or %NULL if it can't be found.
159 static inline struct port *__get_next_port(struct port *port)
161 struct bonding *bond = __get_bond_by_port(port);
162 struct slave *slave = port->slave;
164 // If there's no bond for this port, or this is the last slave
165 if ((bond == NULL) || (slave->next == bond->first_slave)) {
169 return &(SLAVE_AD_INFO(slave->next).port);
173 * __get_first_agg - get the first aggregator in the bond
174 * @bond: the bond we're looking at
176 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
179 static inline struct aggregator *__get_first_agg(struct port *port)
181 struct bonding *bond = __get_bond_by_port(port);
183 // If there's no bond for this port, or bond has no slaves
184 if ((bond == NULL) || (bond->slave_cnt == 0)) {
188 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
192 * __get_next_agg - get the next aggregator in the bond
193 * @aggregator: the aggregator we're looking at
195 * Return the aggregator of the slave that is next in line of @aggregator's
196 * slave in the bond, or %NULL if it can't be found.
198 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
200 struct slave *slave = aggregator->slave;
201 struct bonding *bond = bond_get_bond_by_slave(slave);
203 // If there's no bond for this aggregator, or this is the last slave
204 if ((bond == NULL) || (slave->next == bond->first_slave)) {
208 return &(SLAVE_AD_INFO(slave->next).aggregator);
214 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
215 * address for the partner). Return 0 if not.
217 static inline int __agg_has_partner(struct aggregator *agg)
219 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
223 * __disable_port - disable the port's slave
224 * @port: the port we're looking at
227 static inline void __disable_port(struct port *port)
229 bond_set_slave_inactive_flags(port->slave);
233 * __enable_port - enable the port's slave, if it's up
234 * @port: the port we're looking at
237 static inline void __enable_port(struct port *port)
239 struct slave *slave = port->slave;
241 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) {
242 bond_set_slave_active_flags(slave);
247 * __port_is_enabled - check if the port's slave is in active state
248 * @port: the port we're looking at
251 static inline int __port_is_enabled(struct port *port)
253 return(port->slave->state == BOND_STATE_ACTIVE);
257 * __get_agg_selection_mode - get the aggregator selection mode
258 * @port: the port we're looking at
260 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
262 static inline u32 __get_agg_selection_mode(struct port *port)
264 struct bonding *bond = __get_bond_by_port(port);
267 return BOND_AD_STABLE;
270 return BOND_AD_INFO(bond).agg_select_mode;
274 * __check_agg_selection_timer - check if the selection timer has expired
275 * @port: the port we're looking at
278 static inline int __check_agg_selection_timer(struct port *port)
280 struct bonding *bond = __get_bond_by_port(port);
286 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
290 * __get_rx_machine_lock - lock the port's RX machine
291 * @port: the port we're looking at
294 static inline void __get_rx_machine_lock(struct port *port)
296 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
300 * __release_rx_machine_lock - unlock the port's RX machine
301 * @port: the port we're looking at
304 static inline void __release_rx_machine_lock(struct port *port)
306 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
310 * __get_link_speed - get a port's speed
311 * @port: the port we're looking at
313 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
315 * %AD_LINK_SPEED_BITMASK_10MBPS,
316 * %AD_LINK_SPEED_BITMASK_100MBPS,
317 * %AD_LINK_SPEED_BITMASK_1000MBPS,
318 * %AD_LINK_SPEED_BITMASK_10000MBPS
320 static u16 __get_link_speed(struct port *port)
322 struct slave *slave = port->slave;
325 /* this if covers only a special case: when the configuration starts with
326 * link down, it sets the speed to 0.
327 * This is done in spite of the fact that the e100 driver reports 0 to be
328 * compatible with MVT in the future.*/
329 if (slave->link != BOND_LINK_UP) {
332 switch (slave->speed) {
334 speed = AD_LINK_SPEED_BITMASK_10MBPS;
338 speed = AD_LINK_SPEED_BITMASK_100MBPS;
342 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
346 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
350 speed = 0; // unknown speed value from ethtool. shouldn't happen
355 pr_debug("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed);
360 * __get_duplex - get a port's duplex
361 * @port: the port we're looking at
363 * Return @port's duplex in 802.3ad bitmask format. i.e.:
364 * 0x01 if in full duplex
367 static u8 __get_duplex(struct port *port)
369 struct slave *slave = port->slave;
373 // handling a special case: when the configuration starts with
374 // link down, it sets the duplex to 0.
375 if (slave->link != BOND_LINK_UP) {
378 switch (slave->duplex) {
381 pr_debug("Port %d Received status full duplex update from adapter\n", port->actor_port_number);
386 pr_debug("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number);
394 * __initialize_port_locks - initialize a port's RX machine spinlock
395 * @port: the port we're looking at
398 static inline void __initialize_port_locks(struct port *port)
400 // make sure it isn't called twice
401 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
407 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
408 * @timer_type: which timer to operate
409 * @par: timer parameter. see below
411 * If @timer_type is %current_while_timer, @par indicates long/short timer.
412 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
413 * %SLOW_PERIODIC_TIME.
415 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
417 u16 retval=0; //to silence the compiler
419 switch (timer_type) {
420 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
421 if (par) { // for short or long timeout
422 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
424 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
427 case AD_ACTOR_CHURN_TIMER: // for local churn machine
428 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
430 case AD_PERIODIC_TIMER: // for periodic machine
431 retval = (par*ad_ticks_per_sec); // long timeout
433 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
434 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
436 case AD_WAIT_WHILE_TIMER: // for selection machine
437 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
444 /////////////////////////////////////////////////////////////////////////////////
445 // ================= ad_rx_machine helper functions ==================
446 /////////////////////////////////////////////////////////////////////////////////
449 * __choose_matched - update a port's matched variable from a received lacpdu
450 * @lacpdu: the lacpdu we've received
451 * @port: the port we're looking at
453 * Update the value of the matched variable, using parameter values from a
454 * newly received lacpdu. Parameter values for the partner carried in the
455 * received PDU are compared with the corresponding operational parameter
456 * values for the actor. Matched is set to TRUE if all of these parameters
457 * match and the PDU parameter partner_state.aggregation has the same value as
458 * actor_oper_port_state.aggregation and lacp will actively maintain the link
459 * in the aggregation. Matched is also set to TRUE if the value of
460 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
461 * an individual link and lacp will actively maintain the link. Otherwise,
462 * matched is set to FALSE. LACP is considered to be actively maintaining the
463 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
464 * the actor's actor_oper_port_state.lacp_activity and the PDU's
465 * partner_state.lacp_activity variables are TRUE.
467 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
468 * used here to implement the language from 802.3ad 43.4.9 that requires
469 * recordPDU to "match" the LACPDU parameters to the stored values.
471 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
473 // check if all parameters are alike
474 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
475 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
476 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
477 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
478 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
479 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
480 // or this is individual link(aggregation == FALSE)
481 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
483 // update the state machine Matched variable
484 port->sm_vars |= AD_PORT_MATCHED;
486 port->sm_vars &= ~AD_PORT_MATCHED;
491 * __record_pdu - record parameters from a received lacpdu
492 * @lacpdu: the lacpdu we've received
493 * @port: the port we're looking at
495 * Record the parameter values for the Actor carried in a received lacpdu as
496 * the current partner operational parameter values and sets
497 * actor_oper_port_state.defaulted to FALSE.
499 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
501 if (lacpdu && port) {
502 struct port_params *partner = &port->partner_oper;
504 __choose_matched(lacpdu, port);
505 // record the new parameter values for the partner operational
506 partner->port_number = ntohs(lacpdu->actor_port);
507 partner->port_priority = ntohs(lacpdu->actor_port_priority);
508 partner->system = lacpdu->actor_system;
509 partner->system_priority = ntohs(lacpdu->actor_system_priority);
510 partner->key = ntohs(lacpdu->actor_key);
511 partner->port_state = lacpdu->actor_state;
513 // set actor_oper_port_state.defaulted to FALSE
514 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
516 // set the partner sync. to on if the partner is sync. and the port is matched
517 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
518 partner->port_state |= AD_STATE_SYNCHRONIZATION;
520 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
526 * __record_default - record default parameters
527 * @port: the port we're looking at
529 * This function records the default parameter values for the partner carried
530 * in the Partner Admin parameters as the current partner operational parameter
531 * values and sets actor_oper_port_state.defaulted to TRUE.
533 static void __record_default(struct port *port)
536 // record the partner admin parameters
537 memcpy(&port->partner_oper, &port->partner_admin,
538 sizeof(struct port_params));
540 // set actor_oper_port_state.defaulted to true
541 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
546 * __update_selected - update a port's Selected variable from a received lacpdu
547 * @lacpdu: the lacpdu we've received
548 * @port: the port we're looking at
550 * Update the value of the selected variable, using parameter values from a
551 * newly received lacpdu. The parameter values for the Actor carried in the
552 * received PDU are compared with the corresponding operational parameter
553 * values for the ports partner. If one or more of the comparisons shows that
554 * the value(s) received in the PDU differ from the current operational values,
555 * then selected is set to FALSE and actor_oper_port_state.synchronization is
556 * set to out_of_sync. Otherwise, selected remains unchanged.
558 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
560 if (lacpdu && port) {
561 const struct port_params *partner = &port->partner_oper;
563 // check if any parameter is different
564 if (ntohs(lacpdu->actor_port) != partner->port_number
565 || ntohs(lacpdu->actor_port_priority) != partner->port_priority
566 || MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system)
567 || ntohs(lacpdu->actor_system_priority) != partner->system_priority
568 || ntohs(lacpdu->actor_key) != partner->key
569 || (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
570 // update the state machine Selected variable
571 port->sm_vars &= ~AD_PORT_SELECTED;
577 * __update_default_selected - update a port's Selected variable from Partner
578 * @port: the port we're looking at
580 * This function updates the value of the selected variable, using the partner
581 * administrative parameter values. The administrative values are compared with
582 * the corresponding operational parameter values for the partner. If one or
583 * more of the comparisons shows that the administrative value(s) differ from
584 * the current operational values, then Selected is set to FALSE and
585 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
586 * Selected remains unchanged.
588 static void __update_default_selected(struct port *port)
591 const struct port_params *admin = &port->partner_admin;
592 const struct port_params *oper = &port->partner_oper;
594 // check if any parameter is different
595 if (admin->port_number != oper->port_number
596 || admin->port_priority != oper->port_priority
597 || MAC_ADDRESS_COMPARE(&admin->system, &oper->system)
598 || admin->system_priority != oper->system_priority
599 || admin->key != oper->key
600 || (admin->port_state & AD_STATE_AGGREGATION)
601 != (oper->port_state & AD_STATE_AGGREGATION)) {
602 // update the state machine Selected variable
603 port->sm_vars &= ~AD_PORT_SELECTED;
609 * __update_ntt - update a port's ntt variable from a received lacpdu
610 * @lacpdu: the lacpdu we've received
611 * @port: the port we're looking at
613 * Updates the value of the ntt variable, using parameter values from a newly
614 * received lacpdu. The parameter values for the partner carried in the
615 * received PDU are compared with the corresponding operational parameter
616 * values for the Actor. If one or more of the comparisons shows that the
617 * value(s) received in the PDU differ from the current operational values,
618 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
620 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
622 // validate lacpdu and port
623 if (lacpdu && port) {
624 // check if any parameter is different
625 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
626 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
627 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
628 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
629 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
630 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
631 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
632 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
633 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
642 * __attach_bond_to_agg
643 * @port: the port we're looking at
645 * Handle the attaching of the port's control parser/multiplexer and the
646 * aggregator. This function does nothing since the parser/multiplexer of the
647 * receive and the parser/multiplexer of the aggregator are already combined.
649 static void __attach_bond_to_agg(struct port *port)
651 port=NULL; // just to satisfy the compiler
652 // This function does nothing since the parser/multiplexer of the receive
653 // and the parser/multiplexer of the aggregator are already combined
657 * __detach_bond_from_agg
658 * @port: the port we're looking at
660 * Handle the detaching of the port's control parser/multiplexer from the
661 * aggregator. This function does nothing since the parser/multiplexer of the
662 * receive and the parser/multiplexer of the aggregator are already combined.
664 static void __detach_bond_from_agg(struct port *port)
666 port=NULL; // just to satisfy the compiler
667 // This function does nothing sience the parser/multiplexer of the receive
668 // and the parser/multiplexer of the aggregator are already combined
672 * __agg_ports_are_ready - check if all ports in an aggregator are ready
673 * @aggregator: the aggregator we're looking at
676 static int __agg_ports_are_ready(struct aggregator *aggregator)
682 // scan all ports in this aggregator to verfy if they are all ready
683 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
684 if (!(port->sm_vars & AD_PORT_READY_N)) {
695 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
696 * @aggregator: the aggregator we're looking at
697 * @val: Should the ports' ready bit be set on or off
700 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
704 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
706 port->sm_vars |= AD_PORT_READY;
708 port->sm_vars &= ~AD_PORT_READY;
714 * __get_agg_bandwidth - get the total bandwidth of an aggregator
715 * @aggregator: the aggregator we're looking at
718 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
723 if (aggregator->num_of_ports) {
724 basic_speed = __get_link_speed(aggregator->lag_ports);
725 switch (basic_speed) {
726 case AD_LINK_SPEED_BITMASK_1MBPS:
727 bandwidth = aggregator->num_of_ports;
729 case AD_LINK_SPEED_BITMASK_10MBPS:
730 bandwidth = aggregator->num_of_ports * 10;
732 case AD_LINK_SPEED_BITMASK_100MBPS:
733 bandwidth = aggregator->num_of_ports * 100;
735 case AD_LINK_SPEED_BITMASK_1000MBPS:
736 bandwidth = aggregator->num_of_ports * 1000;
738 case AD_LINK_SPEED_BITMASK_10000MBPS:
739 bandwidth = aggregator->num_of_ports * 10000;
742 bandwidth=0; // to silent the compilor ....
749 * __get_active_agg - get the current active aggregator
750 * @aggregator: the aggregator we're looking at
753 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
755 struct aggregator *retval = NULL;
757 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
758 if (aggregator->is_active) {
768 * __update_lacpdu_from_port - update a port's lacpdu fields
769 * @port: the port we're looking at
772 static inline void __update_lacpdu_from_port(struct port *port)
774 struct lacpdu *lacpdu = &port->lacpdu;
775 const struct port_params *partner = &port->partner_oper;
777 /* update current actual Actor parameters */
778 /* lacpdu->subtype initialized
779 * lacpdu->version_number initialized
780 * lacpdu->tlv_type_actor_info initialized
781 * lacpdu->actor_information_length initialized
784 lacpdu->actor_system_priority = htons(port->actor_system_priority);
785 lacpdu->actor_system = port->actor_system;
786 lacpdu->actor_key = htons(port->actor_oper_port_key);
787 lacpdu->actor_port_priority = htons(port->actor_port_priority);
788 lacpdu->actor_port = htons(port->actor_port_number);
789 lacpdu->actor_state = port->actor_oper_port_state;
791 /* lacpdu->reserved_3_1 initialized
792 * lacpdu->tlv_type_partner_info initialized
793 * lacpdu->partner_information_length initialized
796 lacpdu->partner_system_priority = htons(partner->system_priority);
797 lacpdu->partner_system = partner->system;
798 lacpdu->partner_key = htons(partner->key);
799 lacpdu->partner_port_priority = htons(partner->port_priority);
800 lacpdu->partner_port = htons(partner->port_number);
801 lacpdu->partner_state = partner->port_state;
803 /* lacpdu->reserved_3_2 initialized
804 * lacpdu->tlv_type_collector_info initialized
805 * lacpdu->collector_information_length initialized
806 * collector_max_delay initialized
807 * reserved_12[12] initialized
808 * tlv_type_terminator initialized
809 * terminator_length initialized
810 * reserved_50[50] initialized
814 //////////////////////////////////////////////////////////////////////////////////////
815 // ================= main 802.3ad protocol code ======================================
816 //////////////////////////////////////////////////////////////////////////////////////
819 * ad_lacpdu_send - send out a lacpdu packet on a given port
820 * @port: the port we're looking at
822 * Returns: 0 on success
825 static int ad_lacpdu_send(struct port *port)
827 struct slave *slave = port->slave;
829 struct lacpdu_header *lacpdu_header;
830 int length = sizeof(struct lacpdu_header);
832 skb = dev_alloc_skb(length);
837 skb->dev = slave->dev;
838 skb_reset_mac_header(skb);
839 skb->network_header = skb->mac_header + ETH_HLEN;
840 skb->protocol = PKT_TYPE_LACPDU;
841 skb->priority = TC_PRIO_CONTROL;
843 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
845 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
846 /* Note: source addres is set to be the member's PERMANENT address,
847 because we use it to identify loopback lacpdus in receive. */
848 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
849 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
851 lacpdu_header->lacpdu = port->lacpdu; // struct copy
859 * ad_marker_send - send marker information/response on a given port
860 * @port: the port we're looking at
861 * @marker: marker data to send
863 * Returns: 0 on success
866 static int ad_marker_send(struct port *port, struct bond_marker *marker)
868 struct slave *slave = port->slave;
870 struct bond_marker_header *marker_header;
871 int length = sizeof(struct bond_marker_header);
873 skb = dev_alloc_skb(length + 16);
878 skb_reserve(skb, 16);
880 skb->dev = slave->dev;
881 skb_reset_mac_header(skb);
882 skb->network_header = skb->mac_header + ETH_HLEN;
883 skb->protocol = PKT_TYPE_LACPDU;
885 marker_header = (struct bond_marker_header *)skb_put(skb, length);
887 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
888 /* Note: source addres is set to be the member's PERMANENT address,
889 because we use it to identify loopback MARKERs in receive. */
890 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
891 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
893 marker_header->marker = *marker; // struct copy
901 * ad_mux_machine - handle a port's mux state machine
902 * @port: the port we're looking at
905 static void ad_mux_machine(struct port *port)
907 mux_states_t last_state;
909 // keep current State Machine state to compare later if it was changed
910 last_state = port->sm_mux_state;
912 if (port->sm_vars & AD_PORT_BEGIN) {
913 port->sm_mux_state = AD_MUX_DETACHED; // next state
915 switch (port->sm_mux_state) {
916 case AD_MUX_DETACHED:
917 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY
918 port->sm_mux_state = AD_MUX_WAITING; // next state
922 // if SELECTED == FALSE return to DETACH state
923 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
924 port->sm_vars &= ~AD_PORT_READY_N;
925 // in order to withhold the Selection Logic to check all ports READY_N value
926 // every callback cycle to update ready variable, we check READY_N and update READY here
927 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
928 port->sm_mux_state = AD_MUX_DETACHED; // next state
932 // check if the wait_while_timer expired
933 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) {
934 port->sm_vars |= AD_PORT_READY_N;
937 // in order to withhold the selection logic to check all ports READY_N value
938 // every callback cycle to update ready variable, we check READY_N and update READY here
939 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
941 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
942 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) {
943 port->sm_mux_state = AD_MUX_ATTACHED; // next state
946 case AD_MUX_ATTACHED:
947 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
948 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
949 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
950 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
951 port->sm_vars &= ~AD_PORT_READY_N;
952 // in order to withhold the selection logic to check all ports READY_N value
953 // every callback cycle to update ready variable, we check READY_N and update READY here
954 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
955 port->sm_mux_state = AD_MUX_DETACHED;// next state
958 case AD_MUX_COLLECTING_DISTRIBUTING:
959 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
960 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
962 port->sm_mux_state = AD_MUX_ATTACHED;// next state
965 // if port state hasn't changed make
966 // sure that a collecting distributing
967 // port in an active aggregator is enabled
968 if (port->aggregator &&
969 port->aggregator->is_active &&
970 !__port_is_enabled(port)) {
976 default: //to silence the compiler
981 // check if the state machine was changed
982 if (port->sm_mux_state != last_state) {
983 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state);
984 switch (port->sm_mux_state) {
985 case AD_MUX_DETACHED:
986 __detach_bond_from_agg(port);
987 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
988 ad_disable_collecting_distributing(port);
989 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
990 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
994 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
996 case AD_MUX_ATTACHED:
997 __attach_bond_to_agg(port);
998 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
999 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1000 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1001 ad_disable_collecting_distributing(port);
1004 case AD_MUX_COLLECTING_DISTRIBUTING:
1005 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1006 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1007 ad_enable_collecting_distributing(port);
1010 default: //to silence the compiler
1017 * ad_rx_machine - handle a port's rx State Machine
1018 * @lacpdu: the lacpdu we've received
1019 * @port: the port we're looking at
1021 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1022 * CURRENT. If timer expired set the state machine in the proper state.
1023 * In other cases, this function checks if we need to switch to other state.
1025 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1027 rx_states_t last_state;
1029 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1030 __get_rx_machine_lock(port);
1032 // keep current State Machine state to compare later if it was changed
1033 last_state = port->sm_rx_state;
1035 // check if state machine should change state
1036 // first, check if port was reinitialized
1037 if (port->sm_vars & AD_PORT_BEGIN) {
1038 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1040 // check if port is not enabled
1041 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) {
1042 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1044 // check if new lacpdu arrived
1045 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1046 port->sm_rx_timer_counter = 0; // zero timer
1047 port->sm_rx_state = AD_RX_CURRENT;
1049 // if timer is on, and if it is expired
1050 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1051 switch (port->sm_rx_state) {
1053 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1056 port->sm_rx_state = AD_RX_EXPIRED; // next state
1058 default: //to silence the compiler
1062 // if no lacpdu arrived and no timer is on
1063 switch (port->sm_rx_state) {
1064 case AD_RX_PORT_DISABLED:
1065 if (port->sm_vars & AD_PORT_MOVED) {
1066 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1067 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1068 port->sm_rx_state = AD_RX_EXPIRED; // next state
1069 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) {
1070 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1073 default: //to silence the compiler
1080 // check if the State machine was changed or new lacpdu arrived
1081 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1082 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state);
1083 switch (port->sm_rx_state) {
1084 case AD_RX_INITIALIZE:
1085 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1086 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1088 port->sm_vars |= AD_PORT_LACP_ENABLED;
1090 port->sm_vars &= ~AD_PORT_SELECTED;
1091 __record_default(port);
1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1093 port->sm_vars &= ~AD_PORT_MOVED;
1094 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1096 /*- Fall Through -*/
1098 case AD_RX_PORT_DISABLED:
1099 port->sm_vars &= ~AD_PORT_MATCHED;
1101 case AD_RX_LACP_DISABLED:
1102 port->sm_vars &= ~AD_PORT_SELECTED;
1103 __record_default(port);
1104 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1105 port->sm_vars |= AD_PORT_MATCHED;
1106 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1109 //Reset of the Synchronization flag. (Standard 43.4.12)
1110 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1111 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1112 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1113 port->sm_vars &= ~AD_PORT_MATCHED;
1114 port->partner_oper.port_state |=
1115 AD_STATE_LACP_ACTIVITY;
1116 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1117 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1119 case AD_RX_DEFAULTED:
1120 __update_default_selected(port);
1121 __record_default(port);
1122 port->sm_vars |= AD_PORT_MATCHED;
1123 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1126 // detect loopback situation
1127 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1128 // INFO_RECEIVED_LOOPBACK_FRAMES
1129 pr_err(DRV_NAME ": %s: An illegal loopback occurred on "
1130 "adapter (%s). Check the configuration to verify that all "
1131 "Adapters are connected to 802.3ad compliant switch ports\n",
1132 port->slave->dev->master->name, port->slave->dev->name);
1133 __release_rx_machine_lock(port);
1136 __update_selected(lacpdu, port);
1137 __update_ntt(lacpdu, port);
1138 __record_pdu(lacpdu, port);
1139 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1140 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1141 // verify that if the aggregator is enabled, the port is enabled too.
1142 //(because if the link goes down for a short time, the 802.3ad will not
1143 // catch it, and the port will continue to be disabled)
1144 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) {
1145 __enable_port(port);
1148 default: //to silence the compiler
1152 __release_rx_machine_lock(port);
1156 * ad_tx_machine - handle a port's tx state machine
1157 * @port: the port we're looking at
1160 static void ad_tx_machine(struct port *port)
1162 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1163 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1164 // check if there is something to send
1165 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1166 __update_lacpdu_from_port(port);
1168 if (ad_lacpdu_send(port) >= 0) {
1169 pr_debug("Sent LACPDU on port %d\n", port->actor_port_number);
1171 /* mark ntt as false, so it will not be sent again until
1176 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1177 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1182 * ad_periodic_machine - handle a port's periodic state machine
1183 * @port: the port we're looking at
1185 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1187 static void ad_periodic_machine(struct port *port)
1189 periodic_states_t last_state;
1191 // keep current state machine state to compare later if it was changed
1192 last_state = port->sm_periodic_state;
1194 // check if port was reinitialized
1195 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1196 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1198 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1200 // check if state machine should change state
1201 else if (port->sm_periodic_timer_counter) {
1202 // check if periodic state machine expired
1203 if (!(--port->sm_periodic_timer_counter)) {
1204 // if expired then do tx
1205 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1207 // If not expired, check if there is some new timeout parameter from the partner state
1208 switch (port->sm_periodic_state) {
1209 case AD_FAST_PERIODIC:
1210 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1211 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1214 case AD_SLOW_PERIODIC:
1215 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1216 // stop current timer
1217 port->sm_periodic_timer_counter = 0;
1218 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1221 default: //to silence the compiler
1226 switch (port->sm_periodic_state) {
1227 case AD_NO_PERIODIC:
1228 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1230 case AD_PERIODIC_TX:
1231 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1232 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1234 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1237 default: //to silence the compiler
1242 // check if the state machine was changed
1243 if (port->sm_periodic_state != last_state) {
1244 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state);
1245 switch (port->sm_periodic_state) {
1246 case AD_NO_PERIODIC:
1247 port->sm_periodic_timer_counter = 0; // zero timer
1249 case AD_FAST_PERIODIC:
1250 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
1252 case AD_SLOW_PERIODIC:
1253 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
1255 case AD_PERIODIC_TX:
1258 default: //to silence the compiler
1265 * ad_port_selection_logic - select aggregation groups
1266 * @port: the port we're looking at
1268 * Select aggregation groups, and assign each port for it's aggregetor. The
1269 * selection logic is called in the inititalization (after all the handshkes),
1270 * and after every lacpdu receive (if selected is off).
1272 static void ad_port_selection_logic(struct port *port)
1274 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1275 struct port *last_port = NULL, *curr_port;
1278 // if the port is already Selected, do nothing
1279 if (port->sm_vars & AD_PORT_SELECTED) {
1283 // if the port is connected to other aggregator, detach it
1284 if (port->aggregator) {
1285 // detach the port from its former aggregator
1286 temp_aggregator=port->aggregator;
1287 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) {
1288 if (curr_port == port) {
1289 temp_aggregator->num_of_ports--;
1290 if (!last_port) {// if it is the first port attached to the aggregator
1291 temp_aggregator->lag_ports=port->next_port_in_aggregator;
1292 } else {// not the first port attached to the aggregator
1293 last_port->next_port_in_aggregator=port->next_port_in_aggregator;
1296 // clear the port's relations to this aggregator
1297 port->aggregator = NULL;
1298 port->next_port_in_aggregator=NULL;
1299 port->actor_port_aggregator_identifier=0;
1301 pr_debug("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier);
1302 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1303 if (!temp_aggregator->lag_ports) {
1304 ad_clear_agg(temp_aggregator);
1309 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1310 pr_warning(DRV_NAME ": %s: Warning: Port %d (on %s) "
1311 "was related to aggregator %d but was not "
1312 "on its port list\n",
1313 port->slave->dev->master->name,
1314 port->actor_port_number,
1315 port->slave->dev->name,
1316 port->aggregator->aggregator_identifier);
1319 // search on all aggregators for a suitable aggregator for this port
1320 for (aggregator = __get_first_agg(port); aggregator;
1321 aggregator = __get_next_agg(aggregator)) {
1323 // keep a free aggregator for later use(if needed)
1324 if (!aggregator->lag_ports) {
1325 if (!free_aggregator) {
1326 free_aggregator=aggregator;
1330 // check if current aggregator suits us
1331 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1332 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1333 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1334 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1336 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1337 !aggregator->is_individual) // but is not individual OR
1340 // attach to the founded aggregator
1341 port->aggregator = aggregator;
1342 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1343 port->next_port_in_aggregator=aggregator->lag_ports;
1344 port->aggregator->num_of_ports++;
1345 aggregator->lag_ports=port;
1346 pr_debug("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1348 // mark this port as selected
1349 port->sm_vars |= AD_PORT_SELECTED;
1355 // the port couldn't find an aggregator - attach it to a new aggregator
1357 if (free_aggregator) {
1358 // assign port a new aggregator
1359 port->aggregator = free_aggregator;
1360 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1362 // update the new aggregator's parameters
1363 // if port was responsed from the end-user
1364 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex
1365 port->aggregator->is_individual = false;
1367 port->aggregator->is_individual = true;
1370 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1371 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1372 port->aggregator->partner_system=port->partner_oper.system;
1373 port->aggregator->partner_system_priority = port->partner_oper.system_priority;
1374 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1375 port->aggregator->receive_state = 1;
1376 port->aggregator->transmit_state = 1;
1377 port->aggregator->lag_ports = port;
1378 port->aggregator->num_of_ports++;
1380 // mark this port as selected
1381 port->sm_vars |= AD_PORT_SELECTED;
1383 pr_debug("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1385 pr_err(DRV_NAME ": %s: Port %d (on %s) did not find "
1386 "a suitable aggregator\n",
1387 port->slave->dev->master->name,
1388 port->actor_port_number, port->slave->dev->name);
1391 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1392 // else set ready=FALSE in all aggregator's ports
1393 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1395 aggregator = __get_first_agg(port);
1396 ad_agg_selection_logic(aggregator);
1400 * Decide if "agg" is a better choice for the new active aggregator that
1401 * the current best, according to the ad_select policy.
1403 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1404 struct aggregator *curr)
1407 * 0. If no best, select current.
1409 * 1. If the current agg is not individual, and the best is
1410 * individual, select current.
1412 * 2. If current agg is individual and the best is not, keep best.
1414 * 3. Therefore, current and best are both individual or both not
1417 * 3a. If current agg partner replied, and best agg partner did not,
1420 * 3b. If current agg partner did not reply and best agg partner
1421 * did reply, keep best.
1423 * 4. Therefore, current and best both have partner replies or
1424 * both do not, so perform selection policy:
1426 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1427 * select by bandwidth.
1429 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1434 if (!curr->is_individual && best->is_individual)
1437 if (curr->is_individual && !best->is_individual)
1440 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1443 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1446 switch (__get_agg_selection_mode(curr->lag_ports)) {
1448 if (curr->num_of_ports > best->num_of_ports)
1451 if (curr->num_of_ports < best->num_of_ports)
1455 case BOND_AD_STABLE:
1456 case BOND_AD_BANDWIDTH:
1457 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1464 ": %s: Impossible agg select mode %d\n",
1465 curr->slave->dev->master->name,
1466 __get_agg_selection_mode(curr->lag_ports));
1473 static int agg_device_up(const struct aggregator *agg)
1475 return (netif_running(agg->slave->dev) &&
1476 netif_carrier_ok(agg->slave->dev));
1480 * ad_agg_selection_logic - select an aggregation group for a team
1481 * @aggregator: the aggregator we're looking at
1483 * It is assumed that only one aggregator may be selected for a team.
1485 * The logic of this function is to select the aggregator according to
1486 * the ad_select policy:
1488 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1489 * it, and to reselect the active aggregator only if the previous
1490 * aggregator has no more ports related to it.
1492 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1493 * bandwidth, and reselect whenever a link state change takes place or the
1494 * set of slaves in the bond changes.
1496 * BOND_AD_COUNT: select the aggregator with largest number of ports
1497 * (slaves), and reselect whenever a link state change takes place or the
1498 * set of slaves in the bond changes.
1500 * FIXME: this function MUST be called with the first agg in the bond, or
1501 * __get_active_agg() won't work correctly. This function should be better
1502 * called with the bond itself, and retrieve the first agg from it.
1504 static void ad_agg_selection_logic(struct aggregator *agg)
1506 struct aggregator *best, *active, *origin;
1510 active = __get_active_agg(agg);
1511 best = (active && agg_device_up(active)) ? active : NULL;
1516 if (agg->num_of_ports && agg_device_up(agg))
1517 best = ad_agg_selection_test(best, agg);
1519 } while ((agg = __get_next_agg(agg)));
1522 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1524 * For the STABLE policy, don't replace the old active
1525 * aggregator if it's still active (it has an answering
1526 * partner) or if both the best and active don't have an
1527 * answering partner.
1529 if (active && active->lag_ports &&
1530 active->lag_ports->is_enabled &&
1531 (__agg_has_partner(active) ||
1532 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1533 if (!(!active->actor_oper_aggregator_key &&
1534 best->actor_oper_aggregator_key)) {
1536 active->is_active = 1;
1541 if (best && (best == active)) {
1543 active->is_active = 1;
1546 // if there is new best aggregator, activate it
1548 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1549 best->aggregator_identifier, best->num_of_ports,
1550 best->actor_oper_aggregator_key,
1551 best->partner_oper_aggregator_key,
1552 best->is_individual, best->is_active);
1553 pr_debug("best ports %p slave %p %s\n",
1554 best->lag_ports, best->slave,
1555 best->slave ? best->slave->dev->name : "NULL");
1557 for (agg = __get_first_agg(best->lag_ports); agg;
1558 agg = __get_next_agg(agg)) {
1560 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1561 agg->aggregator_identifier, agg->num_of_ports,
1562 agg->actor_oper_aggregator_key,
1563 agg->partner_oper_aggregator_key,
1564 agg->is_individual, agg->is_active);
1567 // check if any partner replys
1568 if (best->is_individual) {
1569 pr_warning(DRV_NAME ": %s: Warning: No 802.3ad"
1570 " response from the link partner for any"
1571 " adapters in the bond\n",
1572 best->slave->dev->master->name);
1575 best->is_active = 1;
1576 pr_debug("LAG %d chosen as the active LAG\n",
1577 best->aggregator_identifier);
1578 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1579 best->aggregator_identifier, best->num_of_ports,
1580 best->actor_oper_aggregator_key,
1581 best->partner_oper_aggregator_key,
1582 best->is_individual, best->is_active);
1584 // disable the ports that were related to the former active_aggregator
1586 for (port = active->lag_ports; port;
1587 port = port->next_port_in_aggregator) {
1588 __disable_port(port);
1594 * if the selected aggregator is of join individuals
1595 * (partner_system is NULL), enable their ports
1597 active = __get_active_agg(origin);
1600 if (!__agg_has_partner(active)) {
1601 for (port = active->lag_ports; port;
1602 port = port->next_port_in_aggregator) {
1603 __enable_port(port);
1608 if (origin->slave) {
1609 struct bonding *bond;
1611 bond = bond_get_bond_by_slave(origin->slave);
1613 bond_3ad_set_carrier(bond);
1618 * ad_clear_agg - clear a given aggregator's parameters
1619 * @aggregator: the aggregator we're looking at
1622 static void ad_clear_agg(struct aggregator *aggregator)
1625 aggregator->is_individual = false;
1626 aggregator->actor_admin_aggregator_key = 0;
1627 aggregator->actor_oper_aggregator_key = 0;
1628 aggregator->partner_system = null_mac_addr;
1629 aggregator->partner_system_priority = 0;
1630 aggregator->partner_oper_aggregator_key = 0;
1631 aggregator->receive_state = 0;
1632 aggregator->transmit_state = 0;
1633 aggregator->lag_ports = NULL;
1634 aggregator->is_active = 0;
1635 aggregator->num_of_ports = 0;
1636 pr_debug("LAG %d was cleared\n", aggregator->aggregator_identifier);
1641 * ad_initialize_agg - initialize a given aggregator's parameters
1642 * @aggregator: the aggregator we're looking at
1645 static void ad_initialize_agg(struct aggregator *aggregator)
1648 ad_clear_agg(aggregator);
1650 aggregator->aggregator_mac_address = null_mac_addr;
1651 aggregator->aggregator_identifier = 0;
1652 aggregator->slave = NULL;
1657 * ad_initialize_port - initialize a given port's parameters
1658 * @aggregator: the aggregator we're looking at
1659 * @lacp_fast: boolean. whether fast periodic should be used
1662 static void ad_initialize_port(struct port *port, int lacp_fast)
1664 static const struct port_params tmpl = {
1665 .system_priority = 0xffff,
1668 .port_priority = 0xff,
1671 static const struct lacpdu lacpdu = {
1673 .version_number = 0x01,
1674 .tlv_type_actor_info = 0x01,
1675 .actor_information_length = 0x14,
1676 .tlv_type_partner_info = 0x02,
1677 .partner_information_length = 0x14,
1678 .tlv_type_collector_info = 0x03,
1679 .collector_information_length = 0x10,
1680 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1684 port->actor_port_number = 1;
1685 port->actor_port_priority = 0xff;
1686 port->actor_system = null_mac_addr;
1687 port->actor_system_priority = 0xffff;
1688 port->actor_port_aggregator_identifier = 0;
1690 port->actor_admin_port_key = 1;
1691 port->actor_oper_port_key = 1;
1692 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1693 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1696 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1699 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1700 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1702 port->is_enabled = true;
1703 // ****** private parameters ******
1704 port->sm_vars = 0x3;
1705 port->sm_rx_state = 0;
1706 port->sm_rx_timer_counter = 0;
1707 port->sm_periodic_state = 0;
1708 port->sm_periodic_timer_counter = 0;
1709 port->sm_mux_state = 0;
1710 port->sm_mux_timer_counter = 0;
1711 port->sm_tx_state = 0;
1712 port->sm_tx_timer_counter = 0;
1714 port->aggregator = NULL;
1715 port->next_port_in_aggregator = NULL;
1716 port->transaction_id = 0;
1718 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1723 * ad_enable_collecting_distributing - enable a port's transmit/receive
1724 * @port: the port we're looking at
1726 * Enable @port if it's in an active aggregator
1728 static void ad_enable_collecting_distributing(struct port *port)
1730 if (port->aggregator->is_active) {
1731 pr_debug("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1732 __enable_port(port);
1737 * ad_disable_collecting_distributing - disable a port's transmit/receive
1738 * @port: the port we're looking at
1741 static void ad_disable_collecting_distributing(struct port *port)
1743 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
1744 pr_debug("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1745 __disable_port(port);
1751 * ad_marker_info_send - send a marker information frame
1752 * @port: the port we're looking at
1754 * This function does nothing since we decided not to implement send and handle
1755 * response for marker PDU's, in this stage, but only to respond to marker
1758 static void ad_marker_info_send(struct port *port)
1760 struct bond_marker marker;
1763 // fill the marker PDU with the appropriate values
1764 marker.subtype = 0x02;
1765 marker.version_number = 0x01;
1766 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1767 marker.marker_length = 0x16;
1768 // convert requester_port to Big Endian
1769 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1770 marker.requester_system = port->actor_system;
1771 // convert requester_port(u32) to Big Endian
1772 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24));
1774 marker.tlv_type_terminator = 0x00;
1775 marker.terminator_length = 0x00;
1776 for (index=0; index<90; index++) {
1777 marker.reserved_90[index]=0;
1780 // send the marker information
1781 if (ad_marker_send(port, &marker) >= 0) {
1782 pr_debug("Sent Marker Information on port %d\n", port->actor_port_number);
1788 * ad_marker_info_received - handle receive of a Marker information frame
1789 * @marker_info: Marker info received
1790 * @port: the port we're looking at
1793 static void ad_marker_info_received(struct bond_marker *marker_info,
1796 struct bond_marker marker;
1798 // copy the received marker data to the response marker
1799 //marker = *marker_info;
1800 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1801 // change the marker subtype to marker response
1802 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE;
1803 // send the marker response
1805 if (ad_marker_send(port, &marker) >= 0) {
1806 pr_debug("Sent Marker Response on port %d\n", port->actor_port_number);
1811 * ad_marker_response_received - handle receive of a marker response frame
1812 * @marker: marker PDU received
1813 * @port: the port we're looking at
1815 * This function does nothing since we decided not to implement send and handle
1816 * response for marker PDU's, in this stage, but only to respond to marker
1819 static void ad_marker_response_received(struct bond_marker *marker,
1822 marker=NULL; // just to satisfy the compiler
1823 port=NULL; // just to satisfy the compiler
1824 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1827 //////////////////////////////////////////////////////////////////////////////////////
1828 // ================= AD exported functions to the main bonding code ==================
1829 //////////////////////////////////////////////////////////////////////////////////////
1831 // Check aggregators status in team every T seconds
1832 #define AD_AGGREGATOR_SELECTION_TIMER 8
1835 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1837 * Set the aggregation selection timer, to initiate an agg selection in
1838 * the very near future. Called during first initialization, and during
1839 * any down to up transitions of the bond.
1841 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1843 BOND_AD_INFO(bond).agg_select_timer = timeout;
1844 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select;
1847 static u16 aggregator_identifier;
1850 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1851 * @bond: bonding struct to work on
1852 * @tick_resolution: tick duration (millisecond resolution)
1853 * @lacp_fast: boolean. whether fast periodic should be used
1855 * Can be called only after the mac address of the bond is set.
1857 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
1859 // check that the bond is not initialized yet
1860 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1861 bond->dev->dev_addr)) {
1863 aggregator_identifier = 0;
1865 BOND_AD_INFO(bond).lacp_fast = lacp_fast;
1866 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1867 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1869 // initialize how many times this module is called in one second(should be about every 100ms)
1870 ad_ticks_per_sec = tick_resolution;
1872 bond_3ad_initiate_agg_selection(bond,
1873 AD_AGGREGATOR_SELECTION_TIMER *
1879 * bond_3ad_bind_slave - initialize a slave's port
1880 * @slave: slave struct to work on
1882 * Returns: 0 on success
1885 int bond_3ad_bind_slave(struct slave *slave)
1887 struct bonding *bond = bond_get_bond_by_slave(slave);
1889 struct aggregator *aggregator;
1892 pr_err(DRV_NAME ": %s: The slave %s is not attached to "
1894 slave->dev->master->name, slave->dev->name);
1898 //check that the slave has not been intialized yet.
1899 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1901 // port initialization
1902 port = &(SLAVE_AD_INFO(slave).port);
1904 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
1906 port->slave = slave;
1907 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1908 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1909 // ------------------------------------------------------------
1910 // Port key : | User key | Speed |Duplex|
1911 // ------------------------------------------------------------
1913 port->actor_admin_port_key = 0; // initialize this parameter
1914 port->actor_admin_port_key |= __get_duplex(port);
1915 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1916 port->actor_oper_port_key = port->actor_admin_port_key;
1917 // if the port is not full duplex, then the port should be not lacp Enabled
1918 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1919 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1921 // actor system is the bond's system
1922 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1923 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1924 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1925 port->aggregator = NULL;
1926 port->next_port_in_aggregator = NULL;
1928 __disable_port(port);
1929 __initialize_port_locks(port);
1932 // aggregator initialization
1933 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1935 ad_initialize_agg(aggregator);
1937 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1938 aggregator->aggregator_identifier = (++aggregator_identifier);
1939 aggregator->slave = slave;
1940 aggregator->is_active = 0;
1941 aggregator->num_of_ports = 0;
1948 * bond_3ad_unbind_slave - deinitialize a slave's port
1949 * @slave: slave struct to work on
1951 * Search for the aggregator that is related to this port, remove the
1952 * aggregator and assign another aggregator for other port related to it
1953 * (if any), and remove the port.
1955 void bond_3ad_unbind_slave(struct slave *slave)
1957 struct port *port, *prev_port, *temp_port;
1958 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1959 int select_new_active_agg = 0;
1961 // find the aggregator related to this slave
1962 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1964 // find the port related to this slave
1965 port = &(SLAVE_AD_INFO(slave).port);
1967 // if slave is null, the whole port is not initialized
1969 pr_warning(DRV_NAME ": Warning: %s: Trying to "
1970 "unbind an uninitialized port on %s\n",
1971 slave->dev->master->name, slave->dev->name);
1975 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier);
1977 /* Tell the partner that this port is not suitable for aggregation */
1978 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1979 __update_lacpdu_from_port(port);
1980 ad_lacpdu_send(port);
1982 // check if this aggregator is occupied
1983 if (aggregator->lag_ports) {
1984 // check if there are other ports related to this aggregator except
1985 // the port related to this slave(thats ensure us that there is a
1986 // reason to search for new aggregator, and that we will find one
1987 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
1988 // find new aggregator for the related port(s)
1989 new_aggregator = __get_first_agg(port);
1990 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
1991 // if the new aggregator is empty, or it is connected to our port only
1992 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) {
1996 // if new aggregator found, copy the aggregator's parameters
1997 // and connect the related lag_ports to the new aggregator
1998 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
1999 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier);
2001 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
2002 pr_info(DRV_NAME ": %s: Removing an active aggregator\n",
2003 aggregator->slave->dev->master->name);
2004 // select new active aggregator
2005 select_new_active_agg = 1;
2008 new_aggregator->is_individual = aggregator->is_individual;
2009 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2010 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2011 new_aggregator->partner_system = aggregator->partner_system;
2012 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2013 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2014 new_aggregator->receive_state = aggregator->receive_state;
2015 new_aggregator->transmit_state = aggregator->transmit_state;
2016 new_aggregator->lag_ports = aggregator->lag_ports;
2017 new_aggregator->is_active = aggregator->is_active;
2018 new_aggregator->num_of_ports = aggregator->num_of_ports;
2020 // update the information that is written on the ports about the aggregator
2021 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) {
2022 temp_port->aggregator=new_aggregator;
2023 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2026 // clear the aggregator
2027 ad_clear_agg(aggregator);
2029 if (select_new_active_agg) {
2030 ad_agg_selection_logic(__get_first_agg(port));
2033 pr_warning(DRV_NAME ": %s: Warning: unbinding aggregator, "
2034 "and could not find a new aggregator for its ports\n",
2035 slave->dev->master->name);
2037 } else { // in case that the only port related to this aggregator is the one we want to remove
2038 select_new_active_agg = aggregator->is_active;
2039 // clear the aggregator
2040 ad_clear_agg(aggregator);
2041 if (select_new_active_agg) {
2042 pr_info(DRV_NAME ": %s: Removing an active aggregator\n",
2043 slave->dev->master->name);
2044 // select new active aggregator
2045 ad_agg_selection_logic(__get_first_agg(port));
2050 pr_debug("Unbinding port %d\n", port->actor_port_number);
2051 // find the aggregator that this port is connected to
2052 temp_aggregator = __get_first_agg(port);
2053 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2055 // search the port in the aggregator's related ports
2056 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) {
2057 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
2059 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2061 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2063 temp_aggregator->num_of_ports--;
2064 if (temp_aggregator->num_of_ports==0) {
2065 select_new_active_agg = temp_aggregator->is_active;
2066 // clear the aggregator
2067 ad_clear_agg(temp_aggregator);
2068 if (select_new_active_agg) {
2069 pr_info(DRV_NAME ": %s: Removing an active aggregator\n",
2070 slave->dev->master->name);
2071 // select new active aggregator
2072 ad_agg_selection_logic(__get_first_agg(port));
2083 * bond_3ad_state_machine_handler - handle state machines timeout
2084 * @bond: bonding struct to work on
2086 * The state machine handling concept in this module is to check every tick
2087 * which state machine should operate any function. The execution order is
2088 * round robin, so when we have an interaction between state machines, the
2089 * reply of one to each other might be delayed until next tick.
2091 * This function also complete the initialization when the agg_select_timer
2092 * times out, and it selects an aggregator for the ports that are yet not
2093 * related to any aggregator, and selects the active aggregator for a bond.
2095 void bond_3ad_state_machine_handler(struct work_struct *work)
2097 struct bonding *bond = container_of(work, struct bonding,
2100 struct aggregator *aggregator;
2102 read_lock(&bond->lock);
2104 if (bond->kill_timers) {
2108 //check if there are any slaves
2109 if (bond->slave_cnt == 0) {
2113 // check if agg_select_timer timer after initialize is timed out
2114 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2115 // select the active aggregator for the bond
2116 if ((port = __get_first_port(bond))) {
2118 pr_warning(DRV_NAME ": %s: Warning: bond's first port is "
2119 "uninitialized\n", bond->dev->name);
2123 aggregator = __get_first_agg(port);
2124 ad_agg_selection_logic(aggregator);
2126 bond_3ad_set_carrier(bond);
2129 // for each port run the state machines
2130 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2132 pr_warning(DRV_NAME ": %s: Warning: Found an uninitialized "
2133 "port\n", bond->dev->name);
2137 ad_rx_machine(NULL, port);
2138 ad_periodic_machine(port);
2139 ad_port_selection_logic(port);
2140 ad_mux_machine(port);
2141 ad_tx_machine(port);
2143 // turn off the BEGIN bit, since we already handled it
2144 if (port->sm_vars & AD_PORT_BEGIN) {
2145 port->sm_vars &= ~AD_PORT_BEGIN;
2150 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2152 read_unlock(&bond->lock);
2156 * bond_3ad_rx_indication - handle a received frame
2157 * @lacpdu: received lacpdu
2158 * @slave: slave struct to work on
2159 * @length: length of the data received
2161 * It is assumed that frames that were sent on this NIC don't returned as new
2162 * received frames (loopback). Since only the payload is given to this
2163 * function, it check for loopback.
2165 static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2169 if (length >= sizeof(struct lacpdu)) {
2171 port = &(SLAVE_AD_INFO(slave).port);
2174 pr_warning(DRV_NAME ": %s: Warning: port of slave %s "
2175 "is uninitialized\n",
2176 slave->dev->name, slave->dev->master->name);
2180 switch (lacpdu->subtype) {
2181 case AD_TYPE_LACPDU:
2182 pr_debug("Received LACPDU on port %d\n", port->actor_port_number);
2183 ad_rx_machine(lacpdu, port);
2186 case AD_TYPE_MARKER:
2187 // No need to convert fields to Little Endian since we don't use the marker's fields.
2189 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2190 case AD_MARKER_INFORMATION_SUBTYPE:
2191 pr_debug("Received Marker Information on port %d\n", port->actor_port_number);
2192 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2195 case AD_MARKER_RESPONSE_SUBTYPE:
2196 pr_debug("Received Marker Response on port %d\n", port->actor_port_number);
2197 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2201 pr_debug("Received an unknown Marker subtype on slot %d\n", port->actor_port_number);
2208 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2209 * @slave: slave struct to work on
2211 * Handle reselection of aggregator (if needed) for this port.
2213 void bond_3ad_adapter_speed_changed(struct slave *slave)
2217 port = &(SLAVE_AD_INFO(slave).port);
2219 // if slave is null, the whole port is not initialized
2221 pr_warning(DRV_NAME ": Warning: %s: speed "
2222 "changed for uninitialized port on %s\n",
2223 slave->dev->master->name, slave->dev->name);
2227 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2228 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2229 pr_debug("Port %d changed speed\n", port->actor_port_number);
2230 // there is no need to reselect a new aggregator, just signal the
2231 // state machines to reinitialize
2232 port->sm_vars |= AD_PORT_BEGIN;
2236 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2237 * @slave: slave struct to work on
2239 * Handle reselection of aggregator (if needed) for this port.
2241 void bond_3ad_adapter_duplex_changed(struct slave *slave)
2245 port=&(SLAVE_AD_INFO(slave).port);
2247 // if slave is null, the whole port is not initialized
2249 pr_warning(DRV_NAME ": %s: Warning: duplex changed "
2250 "for uninitialized port on %s\n",
2251 slave->dev->master->name, slave->dev->name);
2255 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2256 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2257 pr_debug("Port %d changed duplex\n", port->actor_port_number);
2258 // there is no need to reselect a new aggregator, just signal the
2259 // state machines to reinitialize
2260 port->sm_vars |= AD_PORT_BEGIN;
2264 * bond_3ad_handle_link_change - handle a slave's link status change indication
2265 * @slave: slave struct to work on
2266 * @status: whether the link is now up or down
2268 * Handle reselection of aggregator (if needed) for this port.
2270 void bond_3ad_handle_link_change(struct slave *slave, char link)
2274 port = &(SLAVE_AD_INFO(slave).port);
2276 // if slave is null, the whole port is not initialized
2278 pr_warning(DRV_NAME ": Warning: %s: link status changed for "
2279 "uninitialized port on %s\n",
2280 slave->dev->master->name, slave->dev->name);
2284 // 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)
2285 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2286 if (link == BOND_LINK_UP) {
2287 port->is_enabled = true;
2288 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2289 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2290 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2291 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2293 /* link has failed */
2294 port->is_enabled = false;
2295 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2296 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS);
2298 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2299 // there is no need to reselect a new aggregator, just signal the
2300 // state machines to reinitialize
2301 port->sm_vars |= AD_PORT_BEGIN;
2305 * set link state for bonding master: if we have an active
2306 * aggregator, we're up, if not, we're down. Presumes that we cannot
2307 * have an active aggregator if there are no slaves with link up.
2309 * This behavior complies with IEEE 802.3 section 43.3.9.
2311 * Called by bond_set_carrier(). Return zero if carrier state does not
2312 * change, nonzero if it does.
2314 int bond_3ad_set_carrier(struct bonding *bond)
2316 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
2317 if (!netif_carrier_ok(bond->dev)) {
2318 netif_carrier_on(bond->dev);
2324 if (netif_carrier_ok(bond->dev)) {
2325 netif_carrier_off(bond->dev);
2332 * bond_3ad_get_active_agg_info - get information of the active aggregator
2333 * @bond: bonding struct to work on
2334 * @ad_info: ad_info struct to fill with the bond's info
2336 * Returns: 0 on success
2339 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2341 struct aggregator *aggregator = NULL;
2344 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2345 if (port->aggregator && port->aggregator->is_active) {
2346 aggregator = port->aggregator;
2352 ad_info->aggregator_id = aggregator->aggregator_identifier;
2353 ad_info->ports = aggregator->num_of_ports;
2354 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2355 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2356 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2363 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2365 struct slave *slave, *start_at;
2366 struct bonding *bond = netdev_priv(dev);
2371 struct ad_info ad_info;
2374 /* make sure that the slaves list will
2375 * not change during tx
2377 read_lock(&bond->lock);
2379 if (!BOND_IS_OK(bond)) {
2383 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
2384 pr_debug(DRV_NAME ": %s: Error: "
2385 "bond_3ad_get_active_agg_info failed\n", dev->name);
2389 slaves_in_agg = ad_info.ports;
2390 agg_id = ad_info.aggregator_id;
2392 if (slaves_in_agg == 0) {
2393 /*the aggregator is empty*/
2394 pr_debug(DRV_NAME ": %s: Error: active aggregator is empty\n",
2399 slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
2401 bond_for_each_slave(bond, slave, i) {
2402 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2404 if (agg && (agg->aggregator_identifier == agg_id)) {
2406 if (slave_agg_no < 0) {
2412 if (slave_agg_no >= 0) {
2413 pr_err(DRV_NAME ": %s: Error: Couldn't find a slave to tx on "
2414 "for aggregator ID %d\n", dev->name, agg_id);
2420 bond_for_each_slave_from(bond, slave, i, start_at) {
2421 int slave_agg_id = 0;
2422 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2425 slave_agg_id = agg->aggregator_identifier;
2428 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2429 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2436 /* no suitable interface, frame not sent */
2439 read_unlock(&bond->lock);
2440 return NETDEV_TX_OK;
2443 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev)
2445 struct bonding *bond = netdev_priv(dev);
2446 struct slave *slave = NULL;
2447 int ret = NET_RX_DROP;
2449 if (!(dev->flags & IFF_MASTER))
2452 read_lock(&bond->lock);
2453 slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev),
2458 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
2460 ret = NET_RX_SUCCESS;
2463 read_unlock(&bond->lock);