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 * __record_pdu - record parameters from a received lacpdu
450 * @lacpdu: the lacpdu we've received
451 * @port: the port we're looking at
453 * Record the parameter values for the Actor carried in a received lacpdu as
454 * the current partner operational parameter values and sets
455 * actor_oper_port_state.defaulted to FALSE.
457 static void __record_pdu(struct lacpdu
*lacpdu
, struct port
*port
)
459 if (lacpdu
&& port
) {
460 struct port_params
*partner
= &port
->partner_oper
;
462 // record the new parameter values for the partner operational
463 partner
->port_number
= ntohs(lacpdu
->actor_port
);
464 partner
->port_priority
= ntohs(lacpdu
->actor_port_priority
);
465 partner
->system
= lacpdu
->actor_system
;
466 partner
->system_priority
= ntohs(lacpdu
->actor_system_priority
);
467 partner
->key
= ntohs(lacpdu
->actor_key
);
468 partner
->port_state
= lacpdu
->actor_state
;
470 // set actor_oper_port_state.defaulted to FALSE
471 port
->actor_oper_port_state
&= ~AD_STATE_DEFAULTED
;
473 // set the partner sync. to on if the partner is sync. and the port is matched
474 if ((port
->sm_vars
& AD_PORT_MATCHED
) && (lacpdu
->actor_state
& AD_STATE_SYNCHRONIZATION
)) {
475 partner
->port_state
|= AD_STATE_SYNCHRONIZATION
;
477 partner
->port_state
&= ~AD_STATE_SYNCHRONIZATION
;
483 * __record_default - record default parameters
484 * @port: the port we're looking at
486 * This function records the default parameter values for the partner carried
487 * in the Partner Admin parameters as the current partner operational parameter
488 * values and sets actor_oper_port_state.defaulted to TRUE.
490 static void __record_default(struct port
*port
)
493 // record the partner admin parameters
494 memcpy(&port
->partner_oper
, &port
->partner_admin
,
495 sizeof(struct port_params
));
497 // set actor_oper_port_state.defaulted to true
498 port
->actor_oper_port_state
|= AD_STATE_DEFAULTED
;
503 * __update_selected - update a port's Selected variable from a received lacpdu
504 * @lacpdu: the lacpdu we've received
505 * @port: the port we're looking at
507 * Update the value of the selected variable, using parameter values from a
508 * newly received lacpdu. The parameter values for the Actor carried in the
509 * received PDU are compared with the corresponding operational parameter
510 * values for the ports partner. If one or more of the comparisons shows that
511 * the value(s) received in the PDU differ from the current operational values,
512 * then selected is set to FALSE and actor_oper_port_state.synchronization is
513 * set to out_of_sync. Otherwise, selected remains unchanged.
515 static void __update_selected(struct lacpdu
*lacpdu
, struct port
*port
)
517 if (lacpdu
&& port
) {
518 const struct port_params
*partner
= &port
->partner_oper
;
520 // check if any parameter is different
521 if (ntohs(lacpdu
->actor_port
) != partner
->port_number
522 || ntohs(lacpdu
->actor_port_priority
) != partner
->port_priority
523 || MAC_ADDRESS_COMPARE(&lacpdu
->actor_system
, &partner
->system
)
524 || ntohs(lacpdu
->actor_system_priority
) != partner
->system_priority
525 || ntohs(lacpdu
->actor_key
) != partner
->key
526 || (lacpdu
->actor_state
& AD_STATE_AGGREGATION
) != (partner
->port_state
& AD_STATE_AGGREGATION
)) {
527 // update the state machine Selected variable
528 port
->sm_vars
&= ~AD_PORT_SELECTED
;
534 * __update_default_selected - update a port's Selected variable from Partner
535 * @port: the port we're looking at
537 * This function updates the value of the selected variable, using the partner
538 * administrative parameter values. The administrative values are compared with
539 * the corresponding operational parameter values for the partner. If one or
540 * more of the comparisons shows that the administrative value(s) differ from
541 * the current operational values, then Selected is set to FALSE and
542 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
543 * Selected remains unchanged.
545 static void __update_default_selected(struct port
*port
)
548 const struct port_params
*admin
= &port
->partner_admin
;
549 const struct port_params
*oper
= &port
->partner_oper
;
551 // check if any parameter is different
552 if (admin
->port_number
!= oper
->port_number
553 || admin
->port_priority
!= oper
->port_priority
554 || MAC_ADDRESS_COMPARE(&admin
->system
, &oper
->system
)
555 || admin
->system_priority
!= oper
->system_priority
556 || admin
->key
!= oper
->key
557 || (admin
->port_state
& AD_STATE_AGGREGATION
)
558 != (oper
->port_state
& AD_STATE_AGGREGATION
)) {
559 // update the state machine Selected variable
560 port
->sm_vars
&= ~AD_PORT_SELECTED
;
566 * __choose_matched - update a port's matched variable from a received lacpdu
567 * @lacpdu: the lacpdu we've received
568 * @port: the port we're looking at
570 * Update the value of the matched variable, using parameter values from a
571 * newly received lacpdu. Parameter values for the partner carried in the
572 * received PDU are compared with the corresponding operational parameter
573 * values for the actor. Matched is set to TRUE if all of these parameters
574 * match and the PDU parameter partner_state.aggregation has the same value as
575 * actor_oper_port_state.aggregation and lacp will actively maintain the link
576 * in the aggregation. Matched is also set to TRUE if the value of
577 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
578 * an individual link and lacp will actively maintain the link. Otherwise,
579 * matched is set to FALSE. LACP is considered to be actively maintaining the
580 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
581 * the actor's actor_oper_port_state.lacp_activity and the PDU's
582 * partner_state.lacp_activity variables are TRUE.
584 static void __choose_matched(struct lacpdu
*lacpdu
, struct port
*port
)
586 // validate lacpdu and port
587 if (lacpdu
&& port
) {
588 // check if all parameters are alike
589 if (((ntohs(lacpdu
->partner_port
) == port
->actor_port_number
) &&
590 (ntohs(lacpdu
->partner_port_priority
) == port
->actor_port_priority
) &&
591 !MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) &&
592 (ntohs(lacpdu
->partner_system_priority
) == port
->actor_system_priority
) &&
593 (ntohs(lacpdu
->partner_key
) == port
->actor_oper_port_key
) &&
594 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) == (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))) ||
595 // or this is individual link(aggregation == FALSE)
596 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) == 0)
598 // update the state machine Matched variable
599 port
->sm_vars
|= AD_PORT_MATCHED
;
601 port
->sm_vars
&= ~AD_PORT_MATCHED
;
607 * __update_ntt - update a port's ntt variable from a received lacpdu
608 * @lacpdu: the lacpdu we've received
609 * @port: the port we're looking at
611 * Updates the value of the ntt variable, using parameter values from a newly
612 * received lacpdu. The parameter values for the partner carried in the
613 * received PDU are compared with the corresponding operational parameter
614 * values for the Actor. If one or more of the comparisons shows that the
615 * value(s) received in the PDU differ from the current operational values,
616 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
618 static void __update_ntt(struct lacpdu
*lacpdu
, struct port
*port
)
620 // validate lacpdu and port
621 if (lacpdu
&& port
) {
622 // check if any parameter is different
623 if ((ntohs(lacpdu
->partner_port
) != port
->actor_port_number
) ||
624 (ntohs(lacpdu
->partner_port_priority
) != port
->actor_port_priority
) ||
625 MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) ||
626 (ntohs(lacpdu
->partner_system_priority
) != port
->actor_system_priority
) ||
627 (ntohs(lacpdu
->partner_key
) != port
->actor_oper_port_key
) ||
628 ((lacpdu
->partner_state
& AD_STATE_LACP_ACTIVITY
) != (port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
)) ||
629 ((lacpdu
->partner_state
& AD_STATE_LACP_TIMEOUT
) != (port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) ||
630 ((lacpdu
->partner_state
& AD_STATE_SYNCHRONIZATION
) != (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) ||
631 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) != (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))
640 * __attach_bond_to_agg
641 * @port: the port we're looking at
643 * Handle the attaching of the port's control parser/multiplexer and the
644 * aggregator. This function does nothing since the parser/multiplexer of the
645 * receive and the parser/multiplexer of the aggregator are already combined.
647 static void __attach_bond_to_agg(struct port
*port
)
649 port
=NULL
; // just to satisfy the compiler
650 // This function does nothing since the parser/multiplexer of the receive
651 // and the parser/multiplexer of the aggregator are already combined
655 * __detach_bond_from_agg
656 * @port: the port we're looking at
658 * Handle the detaching of the port's control parser/multiplexer from the
659 * aggregator. This function does nothing since the parser/multiplexer of the
660 * receive and the parser/multiplexer of the aggregator are already combined.
662 static void __detach_bond_from_agg(struct port
*port
)
664 port
=NULL
; // just to satisfy the compiler
665 // This function does nothing sience the parser/multiplexer of the receive
666 // and the parser/multiplexer of the aggregator are already combined
670 * __agg_ports_are_ready - check if all ports in an aggregator are ready
671 * @aggregator: the aggregator we're looking at
674 static int __agg_ports_are_ready(struct aggregator
*aggregator
)
680 // scan all ports in this aggregator to verfy if they are all ready
681 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
682 if (!(port
->sm_vars
& AD_PORT_READY_N
)) {
693 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
694 * @aggregator: the aggregator we're looking at
695 * @val: Should the ports' ready bit be set on or off
698 static void __set_agg_ports_ready(struct aggregator
*aggregator
, int val
)
702 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
704 port
->sm_vars
|= AD_PORT_READY
;
706 port
->sm_vars
&= ~AD_PORT_READY
;
712 * __get_agg_bandwidth - get the total bandwidth of an aggregator
713 * @aggregator: the aggregator we're looking at
716 static u32
__get_agg_bandwidth(struct aggregator
*aggregator
)
721 if (aggregator
->num_of_ports
) {
722 basic_speed
= __get_link_speed(aggregator
->lag_ports
);
723 switch (basic_speed
) {
724 case AD_LINK_SPEED_BITMASK_1MBPS
:
725 bandwidth
= aggregator
->num_of_ports
;
727 case AD_LINK_SPEED_BITMASK_10MBPS
:
728 bandwidth
= aggregator
->num_of_ports
* 10;
730 case AD_LINK_SPEED_BITMASK_100MBPS
:
731 bandwidth
= aggregator
->num_of_ports
* 100;
733 case AD_LINK_SPEED_BITMASK_1000MBPS
:
734 bandwidth
= aggregator
->num_of_ports
* 1000;
736 case AD_LINK_SPEED_BITMASK_10000MBPS
:
737 bandwidth
= aggregator
->num_of_ports
* 10000;
740 bandwidth
=0; // to silent the compilor ....
747 * __get_active_agg - get the current active aggregator
748 * @aggregator: the aggregator we're looking at
751 static struct aggregator
*__get_active_agg(struct aggregator
*aggregator
)
753 struct aggregator
*retval
= NULL
;
755 for (; aggregator
; aggregator
= __get_next_agg(aggregator
)) {
756 if (aggregator
->is_active
) {
766 * __update_lacpdu_from_port - update a port's lacpdu fields
767 * @port: the port we're looking at
770 static inline void __update_lacpdu_from_port(struct port
*port
)
772 struct lacpdu
*lacpdu
= &port
->lacpdu
;
773 const struct port_params
*partner
= &port
->partner_oper
;
775 /* update current actual Actor parameters */
776 /* lacpdu->subtype initialized
777 * lacpdu->version_number initialized
778 * lacpdu->tlv_type_actor_info initialized
779 * lacpdu->actor_information_length initialized
782 lacpdu
->actor_system_priority
= htons(port
->actor_system_priority
);
783 lacpdu
->actor_system
= port
->actor_system
;
784 lacpdu
->actor_key
= htons(port
->actor_oper_port_key
);
785 lacpdu
->actor_port_priority
= htons(port
->actor_port_priority
);
786 lacpdu
->actor_port
= htons(port
->actor_port_number
);
787 lacpdu
->actor_state
= port
->actor_oper_port_state
;
789 /* lacpdu->reserved_3_1 initialized
790 * lacpdu->tlv_type_partner_info initialized
791 * lacpdu->partner_information_length initialized
794 lacpdu
->partner_system_priority
= htons(partner
->system_priority
);
795 lacpdu
->partner_system
= partner
->system
;
796 lacpdu
->partner_key
= htons(partner
->key
);
797 lacpdu
->partner_port_priority
= htons(partner
->port_priority
);
798 lacpdu
->partner_port
= htons(partner
->port_number
);
799 lacpdu
->partner_state
= partner
->port_state
;
801 /* lacpdu->reserved_3_2 initialized
802 * lacpdu->tlv_type_collector_info initialized
803 * lacpdu->collector_information_length initialized
804 * collector_max_delay initialized
805 * reserved_12[12] initialized
806 * tlv_type_terminator initialized
807 * terminator_length initialized
808 * reserved_50[50] initialized
812 //////////////////////////////////////////////////////////////////////////////////////
813 // ================= main 802.3ad protocol code ======================================
814 //////////////////////////////////////////////////////////////////////////////////////
817 * ad_lacpdu_send - send out a lacpdu packet on a given port
818 * @port: the port we're looking at
820 * Returns: 0 on success
823 static int ad_lacpdu_send(struct port
*port
)
825 struct slave
*slave
= port
->slave
;
827 struct lacpdu_header
*lacpdu_header
;
828 int length
= sizeof(struct lacpdu_header
);
830 skb
= dev_alloc_skb(length
);
835 skb
->dev
= slave
->dev
;
836 skb_reset_mac_header(skb
);
837 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
838 skb
->protocol
= PKT_TYPE_LACPDU
;
839 skb
->priority
= TC_PRIO_CONTROL
;
841 lacpdu_header
= (struct lacpdu_header
*)skb_put(skb
, length
);
843 memcpy(lacpdu_header
->hdr
.h_dest
, lacpdu_mcast_addr
, ETH_ALEN
);
844 /* Note: source addres is set to be the member's PERMANENT address,
845 because we use it to identify loopback lacpdus in receive. */
846 memcpy(lacpdu_header
->hdr
.h_source
, slave
->perm_hwaddr
, ETH_ALEN
);
847 lacpdu_header
->hdr
.h_proto
= PKT_TYPE_LACPDU
;
849 lacpdu_header
->lacpdu
= port
->lacpdu
; // struct copy
857 * ad_marker_send - send marker information/response on a given port
858 * @port: the port we're looking at
859 * @marker: marker data to send
861 * Returns: 0 on success
864 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
)
866 struct slave
*slave
= port
->slave
;
868 struct bond_marker_header
*marker_header
;
869 int length
= sizeof(struct bond_marker_header
);
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 memcpy(marker_header
->hdr
.h_dest
, lacpdu_mcast_addr
, ETH_ALEN
);
886 /* Note: source addres is set to be the member's PERMANENT address,
887 because we use it to identify loopback MARKERs in receive. */
888 memcpy(marker_header
->hdr
.h_source
, slave
->perm_hwaddr
, ETH_ALEN
);
889 marker_header
->hdr
.h_proto
= 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
);
1169 /* mark ntt as false, so it will not be sent again until
1174 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1175 port
->sm_tx_timer_counter
=ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1180 * ad_periodic_machine - handle a port's periodic state machine
1181 * @port: the port we're looking at
1183 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1185 static void ad_periodic_machine(struct port
*port
)
1187 periodic_states_t last_state
;
1189 // keep current state machine state to compare later if it was changed
1190 last_state
= port
->sm_periodic_state
;
1192 // check if port was reinitialized
1193 if (((port
->sm_vars
& AD_PORT_BEGIN
) || !(port
->sm_vars
& AD_PORT_LACP_ENABLED
) || !port
->is_enabled
) ||
1194 (!(port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
) && !(port
->partner_oper
.port_state
& AD_STATE_LACP_ACTIVITY
))
1196 port
->sm_periodic_state
= AD_NO_PERIODIC
; // next state
1198 // check if state machine should change state
1199 else if (port
->sm_periodic_timer_counter
) {
1200 // check if periodic state machine expired
1201 if (!(--port
->sm_periodic_timer_counter
)) {
1202 // if expired then do tx
1203 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1205 // If not expired, check if there is some new timeout parameter from the partner state
1206 switch (port
->sm_periodic_state
) {
1207 case AD_FAST_PERIODIC
:
1208 if (!(port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1209 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1212 case AD_SLOW_PERIODIC
:
1213 if ((port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1214 // stop current timer
1215 port
->sm_periodic_timer_counter
= 0;
1216 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1219 default: //to silence the compiler
1224 switch (port
->sm_periodic_state
) {
1225 case AD_NO_PERIODIC
:
1226 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1228 case AD_PERIODIC_TX
:
1229 if (!(port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1230 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1232 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1235 default: //to silence the compiler
1240 // check if the state machine was changed
1241 if (port
->sm_periodic_state
!= last_state
) {
1242 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port
->actor_port_number
, last_state
, port
->sm_periodic_state
);
1243 switch (port
->sm_periodic_state
) {
1244 case AD_NO_PERIODIC
:
1245 port
->sm_periodic_timer_counter
= 0; // zero timer
1247 case AD_FAST_PERIODIC
:
1248 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
1250 case AD_SLOW_PERIODIC
:
1251 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
1253 case AD_PERIODIC_TX
:
1256 default: //to silence the compiler
1263 * ad_port_selection_logic - select aggregation groups
1264 * @port: the port we're looking at
1266 * Select aggregation groups, and assign each port for it's aggregetor. The
1267 * selection logic is called in the inititalization (after all the handshkes),
1268 * and after every lacpdu receive (if selected is off).
1270 static void ad_port_selection_logic(struct port
*port
)
1272 struct aggregator
*aggregator
, *free_aggregator
= NULL
, *temp_aggregator
;
1273 struct port
*last_port
= NULL
, *curr_port
;
1276 // if the port is already Selected, do nothing
1277 if (port
->sm_vars
& AD_PORT_SELECTED
) {
1281 // if the port is connected to other aggregator, detach it
1282 if (port
->aggregator
) {
1283 // detach the port from its former aggregator
1284 temp_aggregator
=port
->aggregator
;
1285 for (curr_port
=temp_aggregator
->lag_ports
; curr_port
; last_port
=curr_port
, curr_port
=curr_port
->next_port_in_aggregator
) {
1286 if (curr_port
== port
) {
1287 temp_aggregator
->num_of_ports
--;
1288 if (!last_port
) {// if it is the first port attached to the aggregator
1289 temp_aggregator
->lag_ports
=port
->next_port_in_aggregator
;
1290 } else {// not the first port attached to the aggregator
1291 last_port
->next_port_in_aggregator
=port
->next_port_in_aggregator
;
1294 // clear the port's relations to this aggregator
1295 port
->aggregator
= NULL
;
1296 port
->next_port_in_aggregator
=NULL
;
1297 port
->actor_port_aggregator_identifier
=0;
1299 pr_debug("Port %d left LAG %d\n", port
->actor_port_number
, temp_aggregator
->aggregator_identifier
);
1300 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1301 if (!temp_aggregator
->lag_ports
) {
1302 ad_clear_agg(temp_aggregator
);
1307 if (!curr_port
) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1308 printk(KERN_WARNING DRV_NAME
": %s: Warning: Port %d (on %s) was "
1309 "related to aggregator %d but was not on its port list\n",
1310 port
->slave
->dev
->master
->name
,
1311 port
->actor_port_number
, port
->slave
->dev
->name
,
1312 port
->aggregator
->aggregator_identifier
);
1315 // search on all aggregators for a suitable aggregator for this port
1316 for (aggregator
= __get_first_agg(port
); aggregator
;
1317 aggregator
= __get_next_agg(aggregator
)) {
1319 // keep a free aggregator for later use(if needed)
1320 if (!aggregator
->lag_ports
) {
1321 if (!free_aggregator
) {
1322 free_aggregator
=aggregator
;
1326 // check if current aggregator suits us
1327 if (((aggregator
->actor_oper_aggregator_key
== port
->actor_oper_port_key
) && // if all parameters match AND
1328 !MAC_ADDRESS_COMPARE(&(aggregator
->partner_system
), &(port
->partner_oper
.system
)) &&
1329 (aggregator
->partner_system_priority
== port
->partner_oper
.system_priority
) &&
1330 (aggregator
->partner_oper_aggregator_key
== port
->partner_oper
.key
)
1332 ((MAC_ADDRESS_COMPARE(&(port
->partner_oper
.system
), &(null_mac_addr
)) && // partner answers
1333 !aggregator
->is_individual
) // but is not individual OR
1336 // attach to the founded aggregator
1337 port
->aggregator
= aggregator
;
1338 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1339 port
->next_port_in_aggregator
=aggregator
->lag_ports
;
1340 port
->aggregator
->num_of_ports
++;
1341 aggregator
->lag_ports
=port
;
1342 pr_debug("Port %d joined LAG %d(existing LAG)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1344 // mark this port as selected
1345 port
->sm_vars
|= AD_PORT_SELECTED
;
1351 // the port couldn't find an aggregator - attach it to a new aggregator
1353 if (free_aggregator
) {
1354 // assign port a new aggregator
1355 port
->aggregator
= free_aggregator
;
1356 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1358 // update the new aggregator's parameters
1359 // if port was responsed from the end-user
1360 if (port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
) {// if port is full duplex
1361 port
->aggregator
->is_individual
= false;
1363 port
->aggregator
->is_individual
= true;
1366 port
->aggregator
->actor_admin_aggregator_key
= port
->actor_admin_port_key
;
1367 port
->aggregator
->actor_oper_aggregator_key
= port
->actor_oper_port_key
;
1368 port
->aggregator
->partner_system
=port
->partner_oper
.system
;
1369 port
->aggregator
->partner_system_priority
= port
->partner_oper
.system_priority
;
1370 port
->aggregator
->partner_oper_aggregator_key
= port
->partner_oper
.key
;
1371 port
->aggregator
->receive_state
= 1;
1372 port
->aggregator
->transmit_state
= 1;
1373 port
->aggregator
->lag_ports
= port
;
1374 port
->aggregator
->num_of_ports
++;
1376 // mark this port as selected
1377 port
->sm_vars
|= AD_PORT_SELECTED
;
1379 pr_debug("Port %d joined LAG %d(new LAG)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1381 printk(KERN_ERR DRV_NAME
": %s: Port %d (on %s) did not find a suitable aggregator\n",
1382 port
->slave
->dev
->master
->name
,
1383 port
->actor_port_number
, port
->slave
->dev
->name
);
1386 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1387 // else set ready=FALSE in all aggregator's ports
1388 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
1390 aggregator
= __get_first_agg(port
);
1391 ad_agg_selection_logic(aggregator
);
1395 * Decide if "agg" is a better choice for the new active aggregator that
1396 * the current best, according to the ad_select policy.
1398 static struct aggregator
*ad_agg_selection_test(struct aggregator
*best
,
1399 struct aggregator
*curr
)
1402 * 0. If no best, select current.
1404 * 1. If the current agg is not individual, and the best is
1405 * individual, select current.
1407 * 2. If current agg is individual and the best is not, keep best.
1409 * 3. Therefore, current and best are both individual or both not
1412 * 3a. If current agg partner replied, and best agg partner did not,
1415 * 3b. If current agg partner did not reply and best agg partner
1416 * did reply, keep best.
1418 * 4. Therefore, current and best both have partner replies or
1419 * both do not, so perform selection policy:
1421 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1422 * select by bandwidth.
1424 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1429 if (!curr
->is_individual
&& best
->is_individual
)
1432 if (curr
->is_individual
&& !best
->is_individual
)
1435 if (__agg_has_partner(curr
) && !__agg_has_partner(best
))
1438 if (!__agg_has_partner(curr
) && __agg_has_partner(best
))
1441 switch (__get_agg_selection_mode(curr
->lag_ports
)) {
1443 if (curr
->num_of_ports
> best
->num_of_ports
)
1446 if (curr
->num_of_ports
< best
->num_of_ports
)
1450 case BOND_AD_STABLE
:
1451 case BOND_AD_BANDWIDTH
:
1452 if (__get_agg_bandwidth(curr
) > __get_agg_bandwidth(best
))
1458 printk(KERN_WARNING DRV_NAME
1459 ": %s: Impossible agg select mode %d\n",
1460 curr
->slave
->dev
->master
->name
,
1461 __get_agg_selection_mode(curr
->lag_ports
));
1468 static int agg_device_up(const struct aggregator
*agg
)
1470 return (netif_running(agg
->slave
->dev
) &&
1471 netif_carrier_ok(agg
->slave
->dev
));
1475 * ad_agg_selection_logic - select an aggregation group for a team
1476 * @aggregator: the aggregator we're looking at
1478 * It is assumed that only one aggregator may be selected for a team.
1480 * The logic of this function is to select the aggregator according to
1481 * the ad_select policy:
1483 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1484 * it, and to reselect the active aggregator only if the previous
1485 * aggregator has no more ports related to it.
1487 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1488 * bandwidth, and reselect whenever a link state change takes place or the
1489 * set of slaves in the bond changes.
1491 * BOND_AD_COUNT: select the aggregator with largest number of ports
1492 * (slaves), and reselect whenever a link state change takes place or the
1493 * set of slaves in the bond changes.
1495 * FIXME: this function MUST be called with the first agg in the bond, or
1496 * __get_active_agg() won't work correctly. This function should be better
1497 * called with the bond itself, and retrieve the first agg from it.
1499 static void ad_agg_selection_logic(struct aggregator
*agg
)
1501 struct aggregator
*best
, *active
, *origin
;
1505 active
= __get_active_agg(agg
);
1506 best
= (active
&& agg_device_up(active
)) ? active
: NULL
;
1511 if (agg
->num_of_ports
&& agg_device_up(agg
))
1512 best
= ad_agg_selection_test(best
, agg
);
1514 } while ((agg
= __get_next_agg(agg
)));
1517 __get_agg_selection_mode(best
->lag_ports
) == BOND_AD_STABLE
) {
1519 * For the STABLE policy, don't replace the old active
1520 * aggregator if it's still active (it has an answering
1521 * partner) or if both the best and active don't have an
1522 * answering partner.
1524 if (active
&& active
->lag_ports
&&
1525 active
->lag_ports
->is_enabled
&&
1526 (__agg_has_partner(active
) ||
1527 (!__agg_has_partner(active
) && !__agg_has_partner(best
)))) {
1528 if (!(!active
->actor_oper_aggregator_key
&&
1529 best
->actor_oper_aggregator_key
)) {
1531 active
->is_active
= 1;
1536 if (best
&& (best
== active
)) {
1538 active
->is_active
= 1;
1541 // if there is new best aggregator, activate it
1543 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1544 best
->aggregator_identifier
, best
->num_of_ports
,
1545 best
->actor_oper_aggregator_key
,
1546 best
->partner_oper_aggregator_key
,
1547 best
->is_individual
, best
->is_active
);
1548 pr_debug("best ports %p slave %p %s\n",
1549 best
->lag_ports
, best
->slave
,
1550 best
->slave
? best
->slave
->dev
->name
: "NULL");
1552 for (agg
= __get_first_agg(best
->lag_ports
); agg
;
1553 agg
= __get_next_agg(agg
)) {
1555 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1556 agg
->aggregator_identifier
, agg
->num_of_ports
,
1557 agg
->actor_oper_aggregator_key
,
1558 agg
->partner_oper_aggregator_key
,
1559 agg
->is_individual
, agg
->is_active
);
1562 // check if any partner replys
1563 if (best
->is_individual
) {
1564 printk(KERN_WARNING DRV_NAME
": %s: Warning: No 802.3ad"
1565 " response from the link partner for any"
1566 " adapters in the bond\n",
1567 best
->slave
->dev
->master
->name
);
1570 best
->is_active
= 1;
1571 pr_debug("LAG %d chosen as the active LAG\n",
1572 best
->aggregator_identifier
);
1573 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1574 best
->aggregator_identifier
, best
->num_of_ports
,
1575 best
->actor_oper_aggregator_key
,
1576 best
->partner_oper_aggregator_key
,
1577 best
->is_individual
, best
->is_active
);
1579 // disable the ports that were related to the former active_aggregator
1581 for (port
= active
->lag_ports
; port
;
1582 port
= port
->next_port_in_aggregator
) {
1583 __disable_port(port
);
1589 * if the selected aggregator is of join individuals
1590 * (partner_system is NULL), enable their ports
1592 active
= __get_active_agg(origin
);
1595 if (!__agg_has_partner(active
)) {
1596 for (port
= active
->lag_ports
; port
;
1597 port
= port
->next_port_in_aggregator
) {
1598 __enable_port(port
);
1603 if (origin
->slave
) {
1604 struct bonding
*bond
;
1606 bond
= bond_get_bond_by_slave(origin
->slave
);
1608 bond_3ad_set_carrier(bond
);
1613 * ad_clear_agg - clear a given aggregator's parameters
1614 * @aggregator: the aggregator we're looking at
1617 static void ad_clear_agg(struct aggregator
*aggregator
)
1620 aggregator
->is_individual
= false;
1621 aggregator
->actor_admin_aggregator_key
= 0;
1622 aggregator
->actor_oper_aggregator_key
= 0;
1623 aggregator
->partner_system
= null_mac_addr
;
1624 aggregator
->partner_system_priority
= 0;
1625 aggregator
->partner_oper_aggregator_key
= 0;
1626 aggregator
->receive_state
= 0;
1627 aggregator
->transmit_state
= 0;
1628 aggregator
->lag_ports
= NULL
;
1629 aggregator
->is_active
= 0;
1630 aggregator
->num_of_ports
= 0;
1631 pr_debug("LAG %d was cleared\n", aggregator
->aggregator_identifier
);
1636 * ad_initialize_agg - initialize a given aggregator's parameters
1637 * @aggregator: the aggregator we're looking at
1640 static void ad_initialize_agg(struct aggregator
*aggregator
)
1643 ad_clear_agg(aggregator
);
1645 aggregator
->aggregator_mac_address
= null_mac_addr
;
1646 aggregator
->aggregator_identifier
= 0;
1647 aggregator
->slave
= NULL
;
1652 * ad_initialize_port - initialize a given port's parameters
1653 * @aggregator: the aggregator we're looking at
1654 * @lacp_fast: boolean. whether fast periodic should be used
1657 static void ad_initialize_port(struct port
*port
, int lacp_fast
)
1659 static const struct port_params tmpl
= {
1660 .system_priority
= 0xffff,
1663 .port_priority
= 0xff,
1666 static const struct lacpdu lacpdu
= {
1668 .version_number
= 0x01,
1669 .tlv_type_actor_info
= 0x01,
1670 .actor_information_length
= 0x14,
1671 .tlv_type_partner_info
= 0x02,
1672 .partner_information_length
= 0x14,
1673 .tlv_type_collector_info
= 0x03,
1674 .collector_information_length
= 0x10,
1675 .collector_max_delay
= htons(AD_COLLECTOR_MAX_DELAY
),
1679 port
->actor_port_number
= 1;
1680 port
->actor_port_priority
= 0xff;
1681 port
->actor_system
= null_mac_addr
;
1682 port
->actor_system_priority
= 0xffff;
1683 port
->actor_port_aggregator_identifier
= 0;
1685 port
->actor_admin_port_key
= 1;
1686 port
->actor_oper_port_key
= 1;
1687 port
->actor_admin_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1688 port
->actor_oper_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1691 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
1694 memcpy(&port
->partner_admin
, &tmpl
, sizeof(tmpl
));
1695 memcpy(&port
->partner_oper
, &tmpl
, sizeof(tmpl
));
1697 port
->is_enabled
= true;
1698 // ****** private parameters ******
1699 port
->sm_vars
= 0x3;
1700 port
->sm_rx_state
= 0;
1701 port
->sm_rx_timer_counter
= 0;
1702 port
->sm_periodic_state
= 0;
1703 port
->sm_periodic_timer_counter
= 0;
1704 port
->sm_mux_state
= 0;
1705 port
->sm_mux_timer_counter
= 0;
1706 port
->sm_tx_state
= 0;
1707 port
->sm_tx_timer_counter
= 0;
1709 port
->aggregator
= NULL
;
1710 port
->next_port_in_aggregator
= NULL
;
1711 port
->transaction_id
= 0;
1713 memcpy(&port
->lacpdu
, &lacpdu
, sizeof(lacpdu
));
1718 * ad_enable_collecting_distributing - enable a port's transmit/receive
1719 * @port: the port we're looking at
1721 * Enable @port if it's in an active aggregator
1723 static void ad_enable_collecting_distributing(struct port
*port
)
1725 if (port
->aggregator
->is_active
) {
1726 pr_debug("Enabling port %d(LAG %d)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1727 __enable_port(port
);
1732 * ad_disable_collecting_distributing - disable a port's transmit/receive
1733 * @port: the port we're looking at
1736 static void ad_disable_collecting_distributing(struct port
*port
)
1738 if (port
->aggregator
&& MAC_ADDRESS_COMPARE(&(port
->aggregator
->partner_system
), &(null_mac_addr
))) {
1739 pr_debug("Disabling port %d(LAG %d)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1740 __disable_port(port
);
1746 * ad_marker_info_send - send a marker information frame
1747 * @port: the port we're looking at
1749 * This function does nothing since we decided not to implement send and handle
1750 * response for marker PDU's, in this stage, but only to respond to marker
1753 static void ad_marker_info_send(struct port
*port
)
1755 struct bond_marker marker
;
1758 // fill the marker PDU with the appropriate values
1759 marker
.subtype
= 0x02;
1760 marker
.version_number
= 0x01;
1761 marker
.tlv_type
= AD_MARKER_INFORMATION_SUBTYPE
;
1762 marker
.marker_length
= 0x16;
1763 // convert requester_port to Big Endian
1764 marker
.requester_port
= (((port
->actor_port_number
& 0xFF) << 8) |((u16
)(port
->actor_port_number
& 0xFF00) >> 8));
1765 marker
.requester_system
= port
->actor_system
;
1766 // convert requester_port(u32) to Big Endian
1767 marker
.requester_transaction_id
= (((++port
->transaction_id
& 0xFF) << 24) |((port
->transaction_id
& 0xFF00) << 8) |((port
->transaction_id
& 0xFF0000) >> 8) |((port
->transaction_id
& 0xFF000000) >> 24));
1769 marker
.tlv_type_terminator
= 0x00;
1770 marker
.terminator_length
= 0x00;
1771 for (index
=0; index
<90; index
++) {
1772 marker
.reserved_90
[index
]=0;
1775 // send the marker information
1776 if (ad_marker_send(port
, &marker
) >= 0) {
1777 pr_debug("Sent Marker Information on port %d\n", port
->actor_port_number
);
1783 * ad_marker_info_received - handle receive of a Marker information frame
1784 * @marker_info: Marker info received
1785 * @port: the port we're looking at
1788 static void ad_marker_info_received(struct bond_marker
*marker_info
,
1791 struct bond_marker marker
;
1793 // copy the received marker data to the response marker
1794 //marker = *marker_info;
1795 memcpy(&marker
, marker_info
, sizeof(struct bond_marker
));
1796 // change the marker subtype to marker response
1797 marker
.tlv_type
=AD_MARKER_RESPONSE_SUBTYPE
;
1798 // send the marker response
1800 if (ad_marker_send(port
, &marker
) >= 0) {
1801 pr_debug("Sent Marker Response on port %d\n", port
->actor_port_number
);
1806 * ad_marker_response_received - handle receive of a marker response frame
1807 * @marker: marker PDU received
1808 * @port: the port we're looking at
1810 * This function does nothing since we decided not to implement send and handle
1811 * response for marker PDU's, in this stage, but only to respond to marker
1814 static void ad_marker_response_received(struct bond_marker
*marker
,
1817 marker
=NULL
; // just to satisfy the compiler
1818 port
=NULL
; // just to satisfy the compiler
1819 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1822 //////////////////////////////////////////////////////////////////////////////////////
1823 // ================= AD exported functions to the main bonding code ==================
1824 //////////////////////////////////////////////////////////////////////////////////////
1826 // Check aggregators status in team every T seconds
1827 #define AD_AGGREGATOR_SELECTION_TIMER 8
1830 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1832 * Set the aggregation selection timer, to initiate an agg selection in
1833 * the very near future. Called during first initialization, and during
1834 * any down to up transitions of the bond.
1836 void bond_3ad_initiate_agg_selection(struct bonding
*bond
, int timeout
)
1838 BOND_AD_INFO(bond
).agg_select_timer
= timeout
;
1839 BOND_AD_INFO(bond
).agg_select_mode
= bond
->params
.ad_select
;
1842 static u16 aggregator_identifier
;
1845 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1846 * @bond: bonding struct to work on
1847 * @tick_resolution: tick duration (millisecond resolution)
1848 * @lacp_fast: boolean. whether fast periodic should be used
1850 * Can be called only after the mac address of the bond is set.
1852 void bond_3ad_initialize(struct bonding
*bond
, u16 tick_resolution
, int lacp_fast
)
1854 // check that the bond is not initialized yet
1855 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond
).system
.sys_mac_addr
),
1856 bond
->dev
->dev_addr
)) {
1858 aggregator_identifier
= 0;
1860 BOND_AD_INFO(bond
).lacp_fast
= lacp_fast
;
1861 BOND_AD_INFO(bond
).system
.sys_priority
= 0xFFFF;
1862 BOND_AD_INFO(bond
).system
.sys_mac_addr
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1864 // initialize how many times this module is called in one second(should be about every 100ms)
1865 ad_ticks_per_sec
= tick_resolution
;
1867 bond_3ad_initiate_agg_selection(bond
,
1868 AD_AGGREGATOR_SELECTION_TIMER
*
1874 * bond_3ad_bind_slave - initialize a slave's port
1875 * @slave: slave struct to work on
1877 * Returns: 0 on success
1880 int bond_3ad_bind_slave(struct slave
*slave
)
1882 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1884 struct aggregator
*aggregator
;
1887 printk(KERN_ERR DRV_NAME
": %s: The slave %s is not attached to its bond\n",
1888 slave
->dev
->master
->name
, slave
->dev
->name
);
1892 //check that the slave has not been intialized yet.
1893 if (SLAVE_AD_INFO(slave
).port
.slave
!= slave
) {
1895 // port initialization
1896 port
= &(SLAVE_AD_INFO(slave
).port
);
1898 ad_initialize_port(port
, BOND_AD_INFO(bond
).lacp_fast
);
1900 port
->slave
= slave
;
1901 port
->actor_port_number
= SLAVE_AD_INFO(slave
).id
;
1902 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1903 // ------------------------------------------------------------
1904 // Port key : | User key | Speed |Duplex|
1905 // ------------------------------------------------------------
1907 port
->actor_admin_port_key
= 0; // initialize this parameter
1908 port
->actor_admin_port_key
|= __get_duplex(port
);
1909 port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
1910 port
->actor_oper_port_key
= port
->actor_admin_port_key
;
1911 // if the port is not full duplex, then the port should be not lacp Enabled
1912 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
)) {
1913 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1915 // actor system is the bond's system
1916 port
->actor_system
= BOND_AD_INFO(bond
).system
.sys_mac_addr
;
1917 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1918 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1919 port
->aggregator
= NULL
;
1920 port
->next_port_in_aggregator
= NULL
;
1922 __disable_port(port
);
1923 __initialize_port_locks(port
);
1926 // aggregator initialization
1927 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
1929 ad_initialize_agg(aggregator
);
1931 aggregator
->aggregator_mac_address
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1932 aggregator
->aggregator_identifier
= (++aggregator_identifier
);
1933 aggregator
->slave
= slave
;
1934 aggregator
->is_active
= 0;
1935 aggregator
->num_of_ports
= 0;
1942 * bond_3ad_unbind_slave - deinitialize a slave's port
1943 * @slave: slave struct to work on
1945 * Search for the aggregator that is related to this port, remove the
1946 * aggregator and assign another aggregator for other port related to it
1947 * (if any), and remove the port.
1949 void bond_3ad_unbind_slave(struct slave
*slave
)
1951 struct port
*port
, *prev_port
, *temp_port
;
1952 struct aggregator
*aggregator
, *new_aggregator
, *temp_aggregator
;
1953 int select_new_active_agg
= 0;
1955 // find the aggregator related to this slave
1956 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
1958 // find the port related to this slave
1959 port
= &(SLAVE_AD_INFO(slave
).port
);
1961 // if slave is null, the whole port is not initialized
1963 printk(KERN_WARNING DRV_NAME
": Warning: %s: Trying to "
1964 "unbind an uninitialized port on %s\n",
1965 slave
->dev
->master
->name
, slave
->dev
->name
);
1969 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator
->aggregator_identifier
);
1971 /* Tell the partner that this port is not suitable for aggregation */
1972 port
->actor_oper_port_state
&= ~AD_STATE_AGGREGATION
;
1973 __update_lacpdu_from_port(port
);
1974 ad_lacpdu_send(port
);
1976 // check if this aggregator is occupied
1977 if (aggregator
->lag_ports
) {
1978 // check if there are other ports related to this aggregator except
1979 // the port related to this slave(thats ensure us that there is a
1980 // reason to search for new aggregator, and that we will find one
1981 if ((aggregator
->lag_ports
!= port
) || (aggregator
->lag_ports
->next_port_in_aggregator
)) {
1982 // find new aggregator for the related port(s)
1983 new_aggregator
= __get_first_agg(port
);
1984 for (; new_aggregator
; new_aggregator
= __get_next_agg(new_aggregator
)) {
1985 // if the new aggregator is empty, or it connected to to our port only
1986 if (!new_aggregator
->lag_ports
|| ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
)) {
1990 // if new aggregator found, copy the aggregator's parameters
1991 // and connect the related lag_ports to the new aggregator
1992 if ((new_aggregator
) && ((!new_aggregator
->lag_ports
) || ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
))) {
1993 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator
->aggregator_identifier
, new_aggregator
->aggregator_identifier
);
1995 if ((new_aggregator
->lag_ports
== port
) && new_aggregator
->is_active
) {
1996 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
1997 aggregator
->slave
->dev
->master
->name
);
1998 // select new active aggregator
1999 select_new_active_agg
= 1;
2002 new_aggregator
->is_individual
= aggregator
->is_individual
;
2003 new_aggregator
->actor_admin_aggregator_key
= aggregator
->actor_admin_aggregator_key
;
2004 new_aggregator
->actor_oper_aggregator_key
= aggregator
->actor_oper_aggregator_key
;
2005 new_aggregator
->partner_system
= aggregator
->partner_system
;
2006 new_aggregator
->partner_system_priority
= aggregator
->partner_system_priority
;
2007 new_aggregator
->partner_oper_aggregator_key
= aggregator
->partner_oper_aggregator_key
;
2008 new_aggregator
->receive_state
= aggregator
->receive_state
;
2009 new_aggregator
->transmit_state
= aggregator
->transmit_state
;
2010 new_aggregator
->lag_ports
= aggregator
->lag_ports
;
2011 new_aggregator
->is_active
= aggregator
->is_active
;
2012 new_aggregator
->num_of_ports
= aggregator
->num_of_ports
;
2014 // update the information that is written on the ports about the aggregator
2015 for (temp_port
=aggregator
->lag_ports
; temp_port
; temp_port
=temp_port
->next_port_in_aggregator
) {
2016 temp_port
->aggregator
=new_aggregator
;
2017 temp_port
->actor_port_aggregator_identifier
= new_aggregator
->aggregator_identifier
;
2020 // clear the aggregator
2021 ad_clear_agg(aggregator
);
2023 if (select_new_active_agg
) {
2024 ad_agg_selection_logic(__get_first_agg(port
));
2027 printk(KERN_WARNING DRV_NAME
": %s: Warning: unbinding aggregator, "
2028 "and could not find a new aggregator for its ports\n",
2029 slave
->dev
->master
->name
);
2031 } else { // in case that the only port related to this aggregator is the one we want to remove
2032 select_new_active_agg
= aggregator
->is_active
;
2033 // clear the aggregator
2034 ad_clear_agg(aggregator
);
2035 if (select_new_active_agg
) {
2036 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2037 slave
->dev
->master
->name
);
2038 // select new active aggregator
2039 ad_agg_selection_logic(__get_first_agg(port
));
2044 pr_debug("Unbinding port %d\n", port
->actor_port_number
);
2045 // find the aggregator that this port is connected to
2046 temp_aggregator
= __get_first_agg(port
);
2047 for (; temp_aggregator
; temp_aggregator
= __get_next_agg(temp_aggregator
)) {
2049 // search the port in the aggregator's related ports
2050 for (temp_port
=temp_aggregator
->lag_ports
; temp_port
; prev_port
=temp_port
, temp_port
=temp_port
->next_port_in_aggregator
) {
2051 if (temp_port
== port
) { // the aggregator found - detach the port from this aggregator
2053 prev_port
->next_port_in_aggregator
= temp_port
->next_port_in_aggregator
;
2055 temp_aggregator
->lag_ports
= temp_port
->next_port_in_aggregator
;
2057 temp_aggregator
->num_of_ports
--;
2058 if (temp_aggregator
->num_of_ports
==0) {
2059 select_new_active_agg
= temp_aggregator
->is_active
;
2060 // clear the aggregator
2061 ad_clear_agg(temp_aggregator
);
2062 if (select_new_active_agg
) {
2063 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2064 slave
->dev
->master
->name
);
2065 // select new active aggregator
2066 ad_agg_selection_logic(__get_first_agg(port
));
2077 * bond_3ad_state_machine_handler - handle state machines timeout
2078 * @bond: bonding struct to work on
2080 * The state machine handling concept in this module is to check every tick
2081 * which state machine should operate any function. The execution order is
2082 * round robin, so when we have an interaction between state machines, the
2083 * reply of one to each other might be delayed until next tick.
2085 * This function also complete the initialization when the agg_select_timer
2086 * times out, and it selects an aggregator for the ports that are yet not
2087 * related to any aggregator, and selects the active aggregator for a bond.
2089 void bond_3ad_state_machine_handler(struct work_struct
*work
)
2091 struct bonding
*bond
= container_of(work
, struct bonding
,
2094 struct aggregator
*aggregator
;
2096 read_lock(&bond
->lock
);
2098 if (bond
->kill_timers
) {
2102 //check if there are any slaves
2103 if (bond
->slave_cnt
== 0) {
2107 // check if agg_select_timer timer after initialize is timed out
2108 if (BOND_AD_INFO(bond
).agg_select_timer
&& !(--BOND_AD_INFO(bond
).agg_select_timer
)) {
2109 // select the active aggregator for the bond
2110 if ((port
= __get_first_port(bond
))) {
2112 printk(KERN_WARNING DRV_NAME
": %s: Warning: bond's first port is "
2113 "uninitialized\n", bond
->dev
->name
);
2117 aggregator
= __get_first_agg(port
);
2118 ad_agg_selection_logic(aggregator
);
2120 bond_3ad_set_carrier(bond
);
2123 // for each port run the state machines
2124 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2126 printk(KERN_WARNING DRV_NAME
": %s: Warning: Found an uninitialized "
2127 "port\n", bond
->dev
->name
);
2131 ad_rx_machine(NULL
, port
);
2132 ad_periodic_machine(port
);
2133 ad_port_selection_logic(port
);
2134 ad_mux_machine(port
);
2135 ad_tx_machine(port
);
2137 // turn off the BEGIN bit, since we already handled it
2138 if (port
->sm_vars
& AD_PORT_BEGIN
) {
2139 port
->sm_vars
&= ~AD_PORT_BEGIN
;
2144 queue_delayed_work(bond
->wq
, &bond
->ad_work
, ad_delta_in_ticks
);
2146 read_unlock(&bond
->lock
);
2150 * bond_3ad_rx_indication - handle a received frame
2151 * @lacpdu: received lacpdu
2152 * @slave: slave struct to work on
2153 * @length: length of the data received
2155 * It is assumed that frames that were sent on this NIC don't returned as new
2156 * received frames (loopback). Since only the payload is given to this
2157 * function, it check for loopback.
2159 static void bond_3ad_rx_indication(struct lacpdu
*lacpdu
, struct slave
*slave
, u16 length
)
2163 if (length
>= sizeof(struct lacpdu
)) {
2165 port
= &(SLAVE_AD_INFO(slave
).port
);
2168 printk(KERN_WARNING DRV_NAME
": %s: Warning: port of slave %s is "
2169 "uninitialized\n", slave
->dev
->name
, slave
->dev
->master
->name
);
2173 switch (lacpdu
->subtype
) {
2174 case AD_TYPE_LACPDU
:
2175 pr_debug("Received LACPDU on port %d\n", port
->actor_port_number
);
2176 ad_rx_machine(lacpdu
, port
);
2179 case AD_TYPE_MARKER
:
2180 // No need to convert fields to Little Endian since we don't use the marker's fields.
2182 switch (((struct bond_marker
*)lacpdu
)->tlv_type
) {
2183 case AD_MARKER_INFORMATION_SUBTYPE
:
2184 pr_debug("Received Marker Information on port %d\n", port
->actor_port_number
);
2185 ad_marker_info_received((struct bond_marker
*)lacpdu
, port
);
2188 case AD_MARKER_RESPONSE_SUBTYPE
:
2189 pr_debug("Received Marker Response on port %d\n", port
->actor_port_number
);
2190 ad_marker_response_received((struct bond_marker
*)lacpdu
, port
);
2194 pr_debug("Received an unknown Marker subtype on slot %d\n", port
->actor_port_number
);
2201 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2202 * @slave: slave struct to work on
2204 * Handle reselection of aggregator (if needed) for this port.
2206 void bond_3ad_adapter_speed_changed(struct slave
*slave
)
2210 port
= &(SLAVE_AD_INFO(slave
).port
);
2212 // if slave is null, the whole port is not initialized
2214 printk(KERN_WARNING DRV_NAME
": Warning: %s: speed "
2215 "changed for uninitialized port on %s\n",
2216 slave
->dev
->master
->name
, slave
->dev
->name
);
2220 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2221 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2222 pr_debug("Port %d changed speed\n", port
->actor_port_number
);
2223 // there is no need to reselect a new aggregator, just signal the
2224 // state machines to reinitialize
2225 port
->sm_vars
|= AD_PORT_BEGIN
;
2229 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2230 * @slave: slave struct to work on
2232 * Handle reselection of aggregator (if needed) for this port.
2234 void bond_3ad_adapter_duplex_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
": %s: Warning: duplex changed "
2243 "for uninitialized port on %s\n",
2244 slave
->dev
->master
->name
, slave
->dev
->name
);
2248 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2249 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2250 pr_debug("Port %d changed duplex\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_handle_link_change - handle a slave's link status change indication
2258 * @slave: slave struct to work on
2259 * @status: whether the link is now up or down
2261 * Handle reselection of aggregator (if needed) for this port.
2263 void bond_3ad_handle_link_change(struct slave
*slave
, char link
)
2267 port
= &(SLAVE_AD_INFO(slave
).port
);
2269 // if slave is null, the whole port is not initialized
2271 printk(KERN_WARNING DRV_NAME
": Warning: %s: link status changed for "
2272 "uninitialized port on %s\n",
2273 slave
->dev
->master
->name
, slave
->dev
->name
);
2277 // 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)
2278 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2279 if (link
== BOND_LINK_UP
) {
2280 port
->is_enabled
= true;
2281 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2282 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2283 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2284 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2286 /* link has failed */
2287 port
->is_enabled
= false;
2288 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2289 port
->actor_oper_port_key
= (port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
);
2291 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2292 // there is no need to reselect a new aggregator, just signal the
2293 // state machines to reinitialize
2294 port
->sm_vars
|= AD_PORT_BEGIN
;
2298 * set link state for bonding master: if we have an active
2299 * aggregator, we're up, if not, we're down. Presumes that we cannot
2300 * have an active aggregator if there are no slaves with link up.
2302 * This behavior complies with IEEE 802.3 section 43.3.9.
2304 * Called by bond_set_carrier(). Return zero if carrier state does not
2305 * change, nonzero if it does.
2307 int bond_3ad_set_carrier(struct bonding
*bond
)
2309 if (__get_active_agg(&(SLAVE_AD_INFO(bond
->first_slave
).aggregator
))) {
2310 if (!netif_carrier_ok(bond
->dev
)) {
2311 netif_carrier_on(bond
->dev
);
2317 if (netif_carrier_ok(bond
->dev
)) {
2318 netif_carrier_off(bond
->dev
);
2325 * bond_3ad_get_active_agg_info - get information of the active aggregator
2326 * @bond: bonding struct to work on
2327 * @ad_info: ad_info struct to fill with the bond's info
2329 * Returns: 0 on success
2332 int bond_3ad_get_active_agg_info(struct bonding
*bond
, struct ad_info
*ad_info
)
2334 struct aggregator
*aggregator
= NULL
;
2337 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2338 if (port
->aggregator
&& port
->aggregator
->is_active
) {
2339 aggregator
= port
->aggregator
;
2345 ad_info
->aggregator_id
= aggregator
->aggregator_identifier
;
2346 ad_info
->ports
= aggregator
->num_of_ports
;
2347 ad_info
->actor_key
= aggregator
->actor_oper_aggregator_key
;
2348 ad_info
->partner_key
= aggregator
->partner_oper_aggregator_key
;
2349 memcpy(ad_info
->partner_system
, aggregator
->partner_system
.mac_addr_value
, ETH_ALEN
);
2356 int bond_3ad_xmit_xor(struct sk_buff
*skb
, struct net_device
*dev
)
2358 struct slave
*slave
, *start_at
;
2359 struct bonding
*bond
= netdev_priv(dev
);
2364 struct ad_info ad_info
;
2367 /* make sure that the slaves list will
2368 * not change during tx
2370 read_lock(&bond
->lock
);
2372 if (!BOND_IS_OK(bond
)) {
2376 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
2377 printk(KERN_DEBUG DRV_NAME
": %s: Error: "
2378 "bond_3ad_get_active_agg_info failed\n", dev
->name
);
2382 slaves_in_agg
= ad_info
.ports
;
2383 agg_id
= ad_info
.aggregator_id
;
2385 if (slaves_in_agg
== 0) {
2386 /*the aggregator is empty*/
2387 printk(KERN_DEBUG DRV_NAME
": %s: Error: active "
2388 "aggregator is empty\n",
2393 slave_agg_no
= bond
->xmit_hash_policy(skb
, dev
, slaves_in_agg
);
2395 bond_for_each_slave(bond
, slave
, i
) {
2396 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2398 if (agg
&& (agg
->aggregator_identifier
== agg_id
)) {
2400 if (slave_agg_no
< 0) {
2406 if (slave_agg_no
>= 0) {
2407 printk(KERN_ERR DRV_NAME
": %s: Error: Couldn't find a slave to tx on "
2408 "for aggregator ID %d\n", dev
->name
, agg_id
);
2414 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
2415 int slave_agg_id
= 0;
2416 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2419 slave_agg_id
= agg
->aggregator_identifier
;
2422 if (SLAVE_IS_OK(slave
) && agg
&& (slave_agg_id
== agg_id
)) {
2423 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
2430 /* no suitable interface, frame not sent */
2433 read_unlock(&bond
->lock
);
2437 int bond_3ad_lacpdu_recv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
* ptype
, struct net_device
*orig_dev
)
2439 struct bonding
*bond
= netdev_priv(dev
);
2440 struct slave
*slave
= NULL
;
2441 int ret
= NET_RX_DROP
;
2443 if (dev_net(dev
) != &init_net
)
2446 if (!(dev
->flags
& IFF_MASTER
))
2449 read_lock(&bond
->lock
);
2450 slave
= bond_get_slave_by_dev((struct bonding
*)netdev_priv(dev
),
2455 bond_3ad_rx_indication((struct lacpdu
*) skb
->data
, slave
, skb
->len
);
2457 ret
= NET_RX_SUCCESS
;
2460 read_unlock(&bond
->lock
);