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
);