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>
32 #include <net/bonding.h>
33 #include <net/bond_3ad.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
63 #define AD_PORT_BEGIN 0x1
64 #define AD_PORT_LACP_ENABLED 0x2
65 #define AD_PORT_ACTOR_CHURN 0x4
66 #define AD_PORT_PARTNER_CHURN 0x8
67 #define AD_PORT_READY 0x10
68 #define AD_PORT_READY_N 0x20
69 #define AD_PORT_MATCHED 0x40
70 #define AD_PORT_STANDBY 0x80
71 #define AD_PORT_SELECTED 0x100
72 #define AD_PORT_MOVED 0x200
73 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
75 /* Port Key definitions
76 * key is determined according to the link speed, duplex and
77 * user key (which is yet not supported)
78 * --------------------------------------------------------------
79 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
80 * --------------------------------------------------------------
83 #define AD_DUPLEX_KEY_MASKS 0x1
84 #define AD_SPEED_KEY_MASKS 0x3E
85 #define AD_USER_KEY_MASKS 0xFFC0
87 enum ad_link_speed_type
{
88 AD_LINK_SPEED_1MBPS
= 1,
90 AD_LINK_SPEED_100MBPS
,
91 AD_LINK_SPEED_1000MBPS
,
92 AD_LINK_SPEED_2500MBPS
,
93 AD_LINK_SPEED_10000MBPS
,
94 AD_LINK_SPEED_20000MBPS
,
95 AD_LINK_SPEED_40000MBPS
,
96 AD_LINK_SPEED_56000MBPS
,
97 AD_LINK_SPEED_100000MBPS
,
100 /* compare MAC addresses */
101 #define MAC_ADDRESS_EQUAL(A, B) \
102 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
104 static struct mac_addr null_mac_addr
= { { 0, 0, 0, 0, 0, 0 } };
105 static u16 ad_ticks_per_sec
;
106 static const int ad_delta_in_ticks
= (AD_TIMER_INTERVAL
* HZ
) / 1000;
108 static const u8 lacpdu_mcast_addr
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
110 /* ================= main 802.3ad protocol functions ================== */
111 static int ad_lacpdu_send(struct port
*port
);
112 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
);
113 static void ad_mux_machine(struct port
*port
, bool *update_slave_arr
);
114 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
);
115 static void ad_tx_machine(struct port
*port
);
116 static void ad_periodic_machine(struct port
*port
);
117 static void ad_port_selection_logic(struct port
*port
, bool *update_slave_arr
);
118 static void ad_agg_selection_logic(struct aggregator
*aggregator
,
119 bool *update_slave_arr
);
120 static void ad_clear_agg(struct aggregator
*aggregator
);
121 static void ad_initialize_agg(struct aggregator
*aggregator
);
122 static void ad_initialize_port(struct port
*port
, int lacp_fast
);
123 static void ad_enable_collecting_distributing(struct port
*port
,
124 bool *update_slave_arr
);
125 static void ad_disable_collecting_distributing(struct port
*port
,
126 bool *update_slave_arr
);
127 static void ad_marker_info_received(struct bond_marker
*marker_info
,
129 static void ad_marker_response_received(struct bond_marker
*marker
,
131 static void ad_update_actor_keys(struct port
*port
, bool reset
);
134 /* ================= api to bonding and kernel code ================== */
137 * __get_bond_by_port - get the port's bonding struct
138 * @port: the port we're looking at
140 * Return @port's bonding struct, or %NULL if it can't be found.
142 static inline struct bonding
*__get_bond_by_port(struct port
*port
)
144 if (port
->slave
== NULL
)
147 return bond_get_bond_by_slave(port
->slave
);
151 * __get_first_agg - get the first aggregator in the bond
152 * @bond: the bond we're looking at
154 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
156 * The caller must hold RCU or RTNL lock.
158 static inline struct aggregator
*__get_first_agg(struct port
*port
)
160 struct bonding
*bond
= __get_bond_by_port(port
);
161 struct slave
*first_slave
;
162 struct aggregator
*agg
;
164 /* If there's no bond for this port, or bond has no slaves */
169 first_slave
= bond_first_slave_rcu(bond
);
170 agg
= first_slave
? &(SLAVE_AD_INFO(first_slave
)->aggregator
) : NULL
;
177 * __agg_has_partner - see if we have a partner
178 * @agg: the agregator we're looking at
180 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
181 * address for the partner). Return 0 if not.
183 static inline int __agg_has_partner(struct aggregator
*agg
)
185 return !is_zero_ether_addr(agg
->partner_system
.mac_addr_value
);
189 * __disable_port - disable the port's slave
190 * @port: the port we're looking at
192 static inline void __disable_port(struct port
*port
)
194 bond_set_slave_inactive_flags(port
->slave
, BOND_SLAVE_NOTIFY_LATER
);
198 * __enable_port - enable the port's slave, if it's up
199 * @port: the port we're looking at
201 static inline void __enable_port(struct port
*port
)
203 struct slave
*slave
= port
->slave
;
205 if ((slave
->link
== BOND_LINK_UP
) && bond_slave_is_up(slave
))
206 bond_set_slave_active_flags(slave
, BOND_SLAVE_NOTIFY_LATER
);
210 * __port_is_enabled - check if the port's slave is in active state
211 * @port: the port we're looking at
213 static inline int __port_is_enabled(struct port
*port
)
215 return bond_is_active_slave(port
->slave
);
219 * __get_agg_selection_mode - get the aggregator selection mode
220 * @port: the port we're looking at
222 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
224 static inline u32
__get_agg_selection_mode(struct port
*port
)
226 struct bonding
*bond
= __get_bond_by_port(port
);
229 return BOND_AD_STABLE
;
231 return bond
->params
.ad_select
;
235 * __check_agg_selection_timer - check if the selection timer has expired
236 * @port: the port we're looking at
238 static inline int __check_agg_selection_timer(struct port
*port
)
240 struct bonding
*bond
= __get_bond_by_port(port
);
245 return BOND_AD_INFO(bond
).agg_select_timer
? 1 : 0;
249 * __get_link_speed - get a port's speed
250 * @port: the port we're looking at
252 * Return @port's speed in 802.3ad enum format. i.e. one of:
254 * %AD_LINK_SPEED_10MBPS,
255 * %AD_LINK_SPEED_100MBPS,
256 * %AD_LINK_SPEED_1000MBPS,
257 * %AD_LINK_SPEED_2500MBPS,
258 * %AD_LINK_SPEED_10000MBPS
259 * %AD_LINK_SPEED_20000MBPS
260 * %AD_LINK_SPEED_40000MBPS
261 * %AD_LINK_SPEED_56000MBPS
262 * %AD_LINK_SPEED_100000MBPS
264 static u16
__get_link_speed(struct port
*port
)
266 struct slave
*slave
= port
->slave
;
269 /* this if covers only a special case: when the configuration starts
270 * with link down, it sets the speed to 0.
271 * This is done in spite of the fact that the e100 driver reports 0
272 * to be compatible with MVT in the future.
274 if (slave
->link
!= BOND_LINK_UP
)
277 switch (slave
->speed
) {
279 speed
= AD_LINK_SPEED_10MBPS
;
283 speed
= AD_LINK_SPEED_100MBPS
;
287 speed
= AD_LINK_SPEED_1000MBPS
;
291 speed
= AD_LINK_SPEED_2500MBPS
;
295 speed
= AD_LINK_SPEED_10000MBPS
;
299 speed
= AD_LINK_SPEED_20000MBPS
;
303 speed
= AD_LINK_SPEED_40000MBPS
;
307 speed
= AD_LINK_SPEED_56000MBPS
;
311 speed
= AD_LINK_SPEED_100000MBPS
;
315 /* unknown speed value from ethtool. shouldn't happen */
321 netdev_dbg(slave
->bond
->dev
, "Port %d Received link speed %d update from adapter\n",
322 port
->actor_port_number
, speed
);
327 * __get_duplex - get a port's duplex
328 * @port: the port we're looking at
330 * Return @port's duplex in 802.3ad bitmask format. i.e.:
331 * 0x01 if in full duplex
334 static u8
__get_duplex(struct port
*port
)
336 struct slave
*slave
= port
->slave
;
339 /* handling a special case: when the configuration starts with
340 * link down, it sets the duplex to 0.
342 if (slave
->link
== BOND_LINK_UP
) {
343 switch (slave
->duplex
) {
346 netdev_dbg(slave
->bond
->dev
, "Port %d Received status full duplex update from adapter\n",
347 port
->actor_port_number
);
352 netdev_dbg(slave
->bond
->dev
, "Port %d Received status NOT full duplex update from adapter\n",
353 port
->actor_port_number
);
363 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
364 * @timer_type: which timer to operate
365 * @par: timer parameter. see below
367 * If @timer_type is %current_while_timer, @par indicates long/short timer.
368 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
369 * %SLOW_PERIODIC_TIME.
371 static u16
__ad_timer_to_ticks(u16 timer_type
, u16 par
)
373 u16 retval
= 0; /* to silence the compiler */
375 switch (timer_type
) {
376 case AD_CURRENT_WHILE_TIMER
: /* for rx machine usage */
378 retval
= (AD_SHORT_TIMEOUT_TIME
*ad_ticks_per_sec
);
380 retval
= (AD_LONG_TIMEOUT_TIME
*ad_ticks_per_sec
);
382 case AD_ACTOR_CHURN_TIMER
: /* for local churn machine */
383 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
385 case AD_PERIODIC_TIMER
: /* for periodic machine */
386 retval
= (par
*ad_ticks_per_sec
); /* long timeout */
388 case AD_PARTNER_CHURN_TIMER
: /* for remote churn machine */
389 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
391 case AD_WAIT_WHILE_TIMER
: /* for selection machine */
392 retval
= (AD_AGGREGATE_WAIT_TIME
*ad_ticks_per_sec
);
400 /* ================= ad_rx_machine helper functions ================== */
403 * __choose_matched - update a port's matched variable from a received lacpdu
404 * @lacpdu: the lacpdu we've received
405 * @port: the port we're looking at
407 * Update the value of the matched variable, using parameter values from a
408 * newly received lacpdu. Parameter values for the partner carried in the
409 * received PDU are compared with the corresponding operational parameter
410 * values for the actor. Matched is set to TRUE if all of these parameters
411 * match and the PDU parameter partner_state.aggregation has the same value as
412 * actor_oper_port_state.aggregation and lacp will actively maintain the link
413 * in the aggregation. Matched is also set to TRUE if the value of
414 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
415 * an individual link and lacp will actively maintain the link. Otherwise,
416 * matched is set to FALSE. LACP is considered to be actively maintaining the
417 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
418 * the actor's actor_oper_port_state.lacp_activity and the PDU's
419 * partner_state.lacp_activity variables are TRUE.
421 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
422 * used here to implement the language from 802.3ad 43.4.9 that requires
423 * recordPDU to "match" the LACPDU parameters to the stored values.
425 static void __choose_matched(struct lacpdu
*lacpdu
, struct port
*port
)
427 /* check if all parameters are alike
428 * or this is individual link(aggregation == FALSE)
429 * then update the state machine Matched variable.
431 if (((ntohs(lacpdu
->partner_port
) == port
->actor_port_number
) &&
432 (ntohs(lacpdu
->partner_port_priority
) == port
->actor_port_priority
) &&
433 MAC_ADDRESS_EQUAL(&(lacpdu
->partner_system
), &(port
->actor_system
)) &&
434 (ntohs(lacpdu
->partner_system_priority
) == port
->actor_system_priority
) &&
435 (ntohs(lacpdu
->partner_key
) == port
->actor_oper_port_key
) &&
436 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) == (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))) ||
437 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) == 0)
439 port
->sm_vars
|= AD_PORT_MATCHED
;
441 port
->sm_vars
&= ~AD_PORT_MATCHED
;
446 * __record_pdu - record parameters from a received lacpdu
447 * @lacpdu: the lacpdu we've received
448 * @port: the port we're looking at
450 * Record the parameter values for the Actor carried in a received lacpdu as
451 * the current partner operational parameter values and sets
452 * actor_oper_port_state.defaulted to FALSE.
454 static void __record_pdu(struct lacpdu
*lacpdu
, struct port
*port
)
456 if (lacpdu
&& port
) {
457 struct port_params
*partner
= &port
->partner_oper
;
459 __choose_matched(lacpdu
, port
);
460 /* record the new parameter values for the partner
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,
474 * and the port is matched
476 if ((port
->sm_vars
& AD_PORT_MATCHED
) &&
477 (lacpdu
->actor_state
& AD_STATE_SYNCHRONIZATION
)) {
478 partner
->port_state
|= AD_STATE_SYNCHRONIZATION
;
479 pr_debug("%s partner sync=1\n", port
->slave
->dev
->name
);
481 partner
->port_state
&= ~AD_STATE_SYNCHRONIZATION
;
482 pr_debug("%s partner sync=0\n", port
->slave
->dev
->name
);
488 * __record_default - record default parameters
489 * @port: the port we're looking at
491 * This function records the default parameter values for the partner carried
492 * in the Partner Admin parameters as the current partner operational parameter
493 * values and sets actor_oper_port_state.defaulted to TRUE.
495 static void __record_default(struct port
*port
)
498 /* record the partner admin parameters */
499 memcpy(&port
->partner_oper
, &port
->partner_admin
,
500 sizeof(struct port_params
));
502 /* set actor_oper_port_state.defaulted to true */
503 port
->actor_oper_port_state
|= AD_STATE_DEFAULTED
;
508 * __update_selected - update a port's Selected variable from a received lacpdu
509 * @lacpdu: the lacpdu we've received
510 * @port: the port we're looking at
512 * Update the value of the selected variable, using parameter values from a
513 * newly received lacpdu. The parameter values for the Actor carried in the
514 * received PDU are compared with the corresponding operational parameter
515 * values for the ports partner. If one or more of the comparisons shows that
516 * the value(s) received in the PDU differ from the current operational values,
517 * then selected is set to FALSE and actor_oper_port_state.synchronization is
518 * set to out_of_sync. Otherwise, selected remains unchanged.
520 static void __update_selected(struct lacpdu
*lacpdu
, struct port
*port
)
522 if (lacpdu
&& port
) {
523 const struct port_params
*partner
= &port
->partner_oper
;
525 /* check if any parameter is different then
526 * update the state machine selected variable.
528 if (ntohs(lacpdu
->actor_port
) != partner
->port_number
||
529 ntohs(lacpdu
->actor_port_priority
) != partner
->port_priority
||
530 !MAC_ADDRESS_EQUAL(&lacpdu
->actor_system
, &partner
->system
) ||
531 ntohs(lacpdu
->actor_system_priority
) != partner
->system_priority
||
532 ntohs(lacpdu
->actor_key
) != partner
->key
||
533 (lacpdu
->actor_state
& AD_STATE_AGGREGATION
) != (partner
->port_state
& AD_STATE_AGGREGATION
)) {
534 port
->sm_vars
&= ~AD_PORT_SELECTED
;
540 * __update_default_selected - update a port's Selected variable from Partner
541 * @port: the port we're looking at
543 * This function updates the value of the selected variable, using the partner
544 * administrative parameter values. The administrative values are compared with
545 * the corresponding operational parameter values for the partner. If one or
546 * more of the comparisons shows that the administrative value(s) differ from
547 * the current operational values, then Selected is set to FALSE and
548 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
549 * Selected remains unchanged.
551 static void __update_default_selected(struct port
*port
)
554 const struct port_params
*admin
= &port
->partner_admin
;
555 const struct port_params
*oper
= &port
->partner_oper
;
557 /* check if any parameter is different then
558 * update the state machine selected variable.
560 if (admin
->port_number
!= oper
->port_number
||
561 admin
->port_priority
!= oper
->port_priority
||
562 !MAC_ADDRESS_EQUAL(&admin
->system
, &oper
->system
) ||
563 admin
->system_priority
!= oper
->system_priority
||
564 admin
->key
!= oper
->key
||
565 (admin
->port_state
& AD_STATE_AGGREGATION
)
566 != (oper
->port_state
& AD_STATE_AGGREGATION
)) {
567 port
->sm_vars
&= ~AD_PORT_SELECTED
;
573 * __update_ntt - update a port's ntt variable from a received lacpdu
574 * @lacpdu: the lacpdu we've received
575 * @port: the port we're looking at
577 * Updates the value of the ntt variable, using parameter values from a newly
578 * received lacpdu. The parameter values for the partner carried in the
579 * received PDU are compared with the corresponding operational parameter
580 * values for the Actor. If one or more of the comparisons shows that the
581 * value(s) received in the PDU differ from the current operational values,
582 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
584 static void __update_ntt(struct lacpdu
*lacpdu
, struct port
*port
)
586 /* validate lacpdu and port */
587 if (lacpdu
&& port
) {
588 /* check if any parameter is different then
589 * update the port->ntt.
591 if ((ntohs(lacpdu
->partner_port
) != port
->actor_port_number
) ||
592 (ntohs(lacpdu
->partner_port_priority
) != port
->actor_port_priority
) ||
593 !MAC_ADDRESS_EQUAL(&(lacpdu
->partner_system
), &(port
->actor_system
)) ||
594 (ntohs(lacpdu
->partner_system_priority
) != port
->actor_system_priority
) ||
595 (ntohs(lacpdu
->partner_key
) != port
->actor_oper_port_key
) ||
596 ((lacpdu
->partner_state
& AD_STATE_LACP_ACTIVITY
) != (port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
)) ||
597 ((lacpdu
->partner_state
& AD_STATE_LACP_TIMEOUT
) != (port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) ||
598 ((lacpdu
->partner_state
& AD_STATE_SYNCHRONIZATION
) != (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) ||
599 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) != (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))
607 * __agg_ports_are_ready - check if all ports in an aggregator are ready
608 * @aggregator: the aggregator we're looking at
611 static int __agg_ports_are_ready(struct aggregator
*aggregator
)
617 /* scan all ports in this aggregator to verfy if they are
620 for (port
= aggregator
->lag_ports
;
622 port
= port
->next_port_in_aggregator
) {
623 if (!(port
->sm_vars
& AD_PORT_READY_N
)) {
634 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
635 * @aggregator: the aggregator we're looking at
636 * @val: Should the ports' ready bit be set on or off
639 static void __set_agg_ports_ready(struct aggregator
*aggregator
, int val
)
643 for (port
= aggregator
->lag_ports
; port
;
644 port
= port
->next_port_in_aggregator
) {
646 port
->sm_vars
|= AD_PORT_READY
;
648 port
->sm_vars
&= ~AD_PORT_READY
;
653 * __get_agg_bandwidth - get the total bandwidth of an aggregator
654 * @aggregator: the aggregator we're looking at
657 static u32
__get_agg_bandwidth(struct aggregator
*aggregator
)
661 if (aggregator
->num_of_ports
) {
662 switch (__get_link_speed(aggregator
->lag_ports
)) {
663 case AD_LINK_SPEED_1MBPS
:
664 bandwidth
= aggregator
->num_of_ports
;
666 case AD_LINK_SPEED_10MBPS
:
667 bandwidth
= aggregator
->num_of_ports
* 10;
669 case AD_LINK_SPEED_100MBPS
:
670 bandwidth
= aggregator
->num_of_ports
* 100;
672 case AD_LINK_SPEED_1000MBPS
:
673 bandwidth
= aggregator
->num_of_ports
* 1000;
675 case AD_LINK_SPEED_2500MBPS
:
676 bandwidth
= aggregator
->num_of_ports
* 2500;
678 case AD_LINK_SPEED_10000MBPS
:
679 bandwidth
= aggregator
->num_of_ports
* 10000;
681 case AD_LINK_SPEED_20000MBPS
:
682 bandwidth
= aggregator
->num_of_ports
* 20000;
684 case AD_LINK_SPEED_40000MBPS
:
685 bandwidth
= aggregator
->num_of_ports
* 40000;
687 case AD_LINK_SPEED_56000MBPS
:
688 bandwidth
= aggregator
->num_of_ports
* 56000;
690 case AD_LINK_SPEED_100000MBPS
:
691 bandwidth
= aggregator
->num_of_ports
* 100000;
694 bandwidth
= 0; /* to silence the compiler */
701 * __get_active_agg - get the current active aggregator
702 * @aggregator: the aggregator we're looking at
704 * Caller must hold RCU lock.
706 static struct aggregator
*__get_active_agg(struct aggregator
*aggregator
)
708 struct bonding
*bond
= aggregator
->slave
->bond
;
709 struct list_head
*iter
;
712 bond_for_each_slave_rcu(bond
, slave
, iter
)
713 if (SLAVE_AD_INFO(slave
)->aggregator
.is_active
)
714 return &(SLAVE_AD_INFO(slave
)->aggregator
);
720 * __update_lacpdu_from_port - update a port's lacpdu fields
721 * @port: the port we're looking at
723 static inline void __update_lacpdu_from_port(struct port
*port
)
725 struct lacpdu
*lacpdu
= &port
->lacpdu
;
726 const struct port_params
*partner
= &port
->partner_oper
;
728 /* update current actual Actor parameters
729 * lacpdu->subtype initialized
730 * lacpdu->version_number initialized
731 * lacpdu->tlv_type_actor_info initialized
732 * lacpdu->actor_information_length initialized
735 lacpdu
->actor_system_priority
= htons(port
->actor_system_priority
);
736 lacpdu
->actor_system
= port
->actor_system
;
737 lacpdu
->actor_key
= htons(port
->actor_oper_port_key
);
738 lacpdu
->actor_port_priority
= htons(port
->actor_port_priority
);
739 lacpdu
->actor_port
= htons(port
->actor_port_number
);
740 lacpdu
->actor_state
= port
->actor_oper_port_state
;
741 pr_debug("update lacpdu: %s, actor port state %x\n",
742 port
->slave
->dev
->name
, port
->actor_oper_port_state
);
744 /* lacpdu->reserved_3_1 initialized
745 * lacpdu->tlv_type_partner_info initialized
746 * lacpdu->partner_information_length initialized
749 lacpdu
->partner_system_priority
= htons(partner
->system_priority
);
750 lacpdu
->partner_system
= partner
->system
;
751 lacpdu
->partner_key
= htons(partner
->key
);
752 lacpdu
->partner_port_priority
= htons(partner
->port_priority
);
753 lacpdu
->partner_port
= htons(partner
->port_number
);
754 lacpdu
->partner_state
= partner
->port_state
;
756 /* lacpdu->reserved_3_2 initialized
757 * lacpdu->tlv_type_collector_info initialized
758 * lacpdu->collector_information_length initialized
759 * collector_max_delay initialized
760 * reserved_12[12] initialized
761 * tlv_type_terminator initialized
762 * terminator_length initialized
763 * reserved_50[50] initialized
767 /* ================= main 802.3ad protocol code ========================= */
770 * ad_lacpdu_send - send out a lacpdu packet on a given port
771 * @port: the port we're looking at
773 * Returns: 0 on success
776 static int ad_lacpdu_send(struct port
*port
)
778 struct slave
*slave
= port
->slave
;
780 struct lacpdu_header
*lacpdu_header
;
781 int length
= sizeof(struct lacpdu_header
);
783 skb
= dev_alloc_skb(length
);
787 skb
->dev
= slave
->dev
;
788 skb_reset_mac_header(skb
);
789 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
790 skb
->protocol
= PKT_TYPE_LACPDU
;
791 skb
->priority
= TC_PRIO_CONTROL
;
793 lacpdu_header
= (struct lacpdu_header
*)skb_put(skb
, length
);
795 ether_addr_copy(lacpdu_header
->hdr
.h_dest
, lacpdu_mcast_addr
);
796 /* Note: source address is set to be the member's PERMANENT address,
797 * because we use it to identify loopback lacpdus in receive.
799 ether_addr_copy(lacpdu_header
->hdr
.h_source
, slave
->perm_hwaddr
);
800 lacpdu_header
->hdr
.h_proto
= PKT_TYPE_LACPDU
;
802 lacpdu_header
->lacpdu
= port
->lacpdu
;
810 * ad_marker_send - send marker information/response on a given port
811 * @port: the port we're looking at
812 * @marker: marker data to send
814 * Returns: 0 on success
817 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
)
819 struct slave
*slave
= port
->slave
;
821 struct bond_marker_header
*marker_header
;
822 int length
= sizeof(struct bond_marker_header
);
824 skb
= dev_alloc_skb(length
+ 16);
828 skb_reserve(skb
, 16);
830 skb
->dev
= slave
->dev
;
831 skb_reset_mac_header(skb
);
832 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
833 skb
->protocol
= PKT_TYPE_LACPDU
;
835 marker_header
= (struct bond_marker_header
*)skb_put(skb
, length
);
837 ether_addr_copy(marker_header
->hdr
.h_dest
, lacpdu_mcast_addr
);
838 /* Note: source address is set to be the member's PERMANENT address,
839 * because we use it to identify loopback MARKERs in receive.
841 ether_addr_copy(marker_header
->hdr
.h_source
, slave
->perm_hwaddr
);
842 marker_header
->hdr
.h_proto
= PKT_TYPE_LACPDU
;
844 marker_header
->marker
= *marker
;
852 * ad_mux_machine - handle a port's mux state machine
853 * @port: the port we're looking at
854 * @update_slave_arr: Does slave array need update?
856 static void ad_mux_machine(struct port
*port
, bool *update_slave_arr
)
858 mux_states_t last_state
;
860 /* keep current State Machine state to compare later if it was
863 last_state
= port
->sm_mux_state
;
865 if (port
->sm_vars
& AD_PORT_BEGIN
) {
866 port
->sm_mux_state
= AD_MUX_DETACHED
;
868 switch (port
->sm_mux_state
) {
869 case AD_MUX_DETACHED
:
870 if ((port
->sm_vars
& AD_PORT_SELECTED
)
871 || (port
->sm_vars
& AD_PORT_STANDBY
))
872 /* if SELECTED or STANDBY */
873 port
->sm_mux_state
= AD_MUX_WAITING
;
876 /* if SELECTED == FALSE return to DETACH state */
877 if (!(port
->sm_vars
& AD_PORT_SELECTED
)) {
878 port
->sm_vars
&= ~AD_PORT_READY_N
;
879 /* in order to withhold the Selection Logic to
880 * check all ports READY_N value every callback
881 * cycle to update ready variable, we check
882 * READY_N and update READY here
884 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
885 port
->sm_mux_state
= AD_MUX_DETACHED
;
889 /* check if the wait_while_timer expired */
890 if (port
->sm_mux_timer_counter
891 && !(--port
->sm_mux_timer_counter
))
892 port
->sm_vars
|= AD_PORT_READY_N
;
894 /* in order to withhold the selection logic to check
895 * all ports READY_N value every callback cycle to
896 * update ready variable, we check READY_N and update
899 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
901 /* if the wait_while_timer expired, and the port is
902 * in READY state, move to ATTACHED state
904 if ((port
->sm_vars
& AD_PORT_READY
)
905 && !port
->sm_mux_timer_counter
)
906 port
->sm_mux_state
= AD_MUX_ATTACHED
;
908 case AD_MUX_ATTACHED
:
909 /* check also if agg_select_timer expired (so the
910 * edable port will take place only after this timer)
912 if ((port
->sm_vars
& AD_PORT_SELECTED
) &&
913 (port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) &&
914 !__check_agg_selection_timer(port
)) {
915 if (port
->aggregator
->is_active
)
917 AD_MUX_COLLECTING_DISTRIBUTING
;
918 } else if (!(port
->sm_vars
& AD_PORT_SELECTED
) ||
919 (port
->sm_vars
& AD_PORT_STANDBY
)) {
920 /* if UNSELECTED or STANDBY */
921 port
->sm_vars
&= ~AD_PORT_READY_N
;
922 /* in order to withhold the selection logic to
923 * check all ports READY_N value every callback
924 * cycle to update ready variable, we check
925 * READY_N and update READY here
927 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
928 port
->sm_mux_state
= AD_MUX_DETACHED
;
929 } else if (port
->aggregator
->is_active
) {
930 port
->actor_oper_port_state
|=
931 AD_STATE_SYNCHRONIZATION
;
934 case AD_MUX_COLLECTING_DISTRIBUTING
:
935 if (!(port
->sm_vars
& AD_PORT_SELECTED
) ||
936 (port
->sm_vars
& AD_PORT_STANDBY
) ||
937 !(port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) ||
938 !(port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) {
939 port
->sm_mux_state
= AD_MUX_ATTACHED
;
941 /* if port state hasn't changed make
942 * sure that a collecting distributing
943 * port in an active aggregator is enabled
945 if (port
->aggregator
&&
946 port
->aggregator
->is_active
&&
947 !__port_is_enabled(port
)) {
958 /* check if the state machine was changed */
959 if (port
->sm_mux_state
!= last_state
) {
960 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
961 port
->actor_port_number
,
962 port
->slave
->dev
->name
,
965 switch (port
->sm_mux_state
) {
966 case AD_MUX_DETACHED
:
967 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
968 ad_disable_collecting_distributing(port
,
970 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
971 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
975 port
->sm_mux_timer_counter
= __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER
, 0);
977 case AD_MUX_ATTACHED
:
978 if (port
->aggregator
->is_active
)
979 port
->actor_oper_port_state
|=
980 AD_STATE_SYNCHRONIZATION
;
982 port
->actor_oper_port_state
&=
983 ~AD_STATE_SYNCHRONIZATION
;
984 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
985 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
986 ad_disable_collecting_distributing(port
,
990 case AD_MUX_COLLECTING_DISTRIBUTING
:
991 port
->actor_oper_port_state
|= AD_STATE_COLLECTING
;
992 port
->actor_oper_port_state
|= AD_STATE_DISTRIBUTING
;
993 port
->actor_oper_port_state
|= AD_STATE_SYNCHRONIZATION
;
994 ad_enable_collecting_distributing(port
,
1005 * ad_rx_machine - handle a port's rx State Machine
1006 * @lacpdu: the lacpdu we've received
1007 * @port: the port we're looking at
1009 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1010 * CURRENT. If timer expired set the state machine in the proper state.
1011 * In other cases, this function checks if we need to switch to other state.
1013 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
)
1015 rx_states_t last_state
;
1017 /* keep current State Machine state to compare later if it was
1020 last_state
= port
->sm_rx_state
;
1022 /* check if state machine should change state */
1024 /* first, check if port was reinitialized */
1025 if (port
->sm_vars
& AD_PORT_BEGIN
) {
1026 port
->sm_rx_state
= AD_RX_INITIALIZE
;
1027 port
->sm_vars
|= AD_PORT_CHURNED
;
1028 /* check if port is not enabled */
1029 } else if (!(port
->sm_vars
& AD_PORT_BEGIN
)
1030 && !port
->is_enabled
&& !(port
->sm_vars
& AD_PORT_MOVED
))
1031 port
->sm_rx_state
= AD_RX_PORT_DISABLED
;
1032 /* check if new lacpdu arrived */
1033 else if (lacpdu
&& ((port
->sm_rx_state
== AD_RX_EXPIRED
) ||
1034 (port
->sm_rx_state
== AD_RX_DEFAULTED
) ||
1035 (port
->sm_rx_state
== AD_RX_CURRENT
))) {
1036 if (port
->sm_rx_state
!= AD_RX_CURRENT
)
1037 port
->sm_vars
|= AD_PORT_CHURNED
;
1038 port
->sm_rx_timer_counter
= 0;
1039 port
->sm_rx_state
= AD_RX_CURRENT
;
1041 /* if timer is on, and if it is expired */
1042 if (port
->sm_rx_timer_counter
&&
1043 !(--port
->sm_rx_timer_counter
)) {
1044 switch (port
->sm_rx_state
) {
1046 port
->sm_rx_state
= AD_RX_DEFAULTED
;
1049 port
->sm_rx_state
= AD_RX_EXPIRED
;
1055 /* if no lacpdu arrived and no timer is on */
1056 switch (port
->sm_rx_state
) {
1057 case AD_RX_PORT_DISABLED
:
1058 if (port
->sm_vars
& AD_PORT_MOVED
)
1059 port
->sm_rx_state
= AD_RX_INITIALIZE
;
1060 else if (port
->is_enabled
1062 & AD_PORT_LACP_ENABLED
))
1063 port
->sm_rx_state
= AD_RX_EXPIRED
;
1064 else if (port
->is_enabled
1066 & AD_PORT_LACP_ENABLED
) == 0))
1067 port
->sm_rx_state
= AD_RX_LACP_DISABLED
;
1076 /* check if the State machine was changed or new lacpdu arrived */
1077 if ((port
->sm_rx_state
!= last_state
) || (lacpdu
)) {
1078 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1079 port
->actor_port_number
,
1080 port
->slave
->dev
->name
,
1083 switch (port
->sm_rx_state
) {
1084 case AD_RX_INITIALIZE
:
1085 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_MASKS
))
1086 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1088 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
1089 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1090 __record_default(port
);
1091 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1092 port
->sm_vars
&= ~AD_PORT_MOVED
;
1093 port
->sm_rx_state
= AD_RX_PORT_DISABLED
;
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
1109 * COLLECTING_DISTRIBUTING state of the mux machine in
1110 * case of EXPIRED even if LINK_DOWN didn't arrive for
1113 port
->partner_oper
.port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1114 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1115 port
->partner_oper
.port_state
|= AD_STATE_LACP_TIMEOUT
;
1116 port
->partner_oper
.port_state
|= AD_STATE_LACP_ACTIVITY
;
1117 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(AD_SHORT_TIMEOUT
));
1118 port
->actor_oper_port_state
|= AD_STATE_EXPIRED
;
1119 port
->sm_vars
|= AD_PORT_CHURNED
;
1121 case AD_RX_DEFAULTED
:
1122 __update_default_selected(port
);
1123 __record_default(port
);
1124 port
->sm_vars
|= AD_PORT_MATCHED
;
1125 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1128 /* detect loopback situation */
1129 if (MAC_ADDRESS_EQUAL(&(lacpdu
->actor_system
),
1130 &(port
->actor_system
))) {
1131 netdev_err(port
->slave
->bond
->dev
, "An illegal loopback occurred on adapter (%s)\n"
1132 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1133 port
->slave
->dev
->name
);
1136 __update_selected(lacpdu
, port
);
1137 __update_ntt(lacpdu
, port
);
1138 __record_pdu(lacpdu
, port
);
1139 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
));
1140 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1149 * ad_churn_machine - handle port churn's state machine
1150 * @port: the port we're looking at
1153 static void ad_churn_machine(struct port
*port
)
1155 if (port
->sm_vars
& AD_PORT_CHURNED
) {
1156 port
->sm_vars
&= ~AD_PORT_CHURNED
;
1157 port
->sm_churn_actor_state
= AD_CHURN_MONITOR
;
1158 port
->sm_churn_partner_state
= AD_CHURN_MONITOR
;
1159 port
->sm_churn_actor_timer_counter
=
1160 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER
, 0);
1161 port
->sm_churn_partner_timer_counter
=
1162 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER
, 0);
1165 if (port
->sm_churn_actor_timer_counter
&&
1166 !(--port
->sm_churn_actor_timer_counter
) &&
1167 port
->sm_churn_actor_state
== AD_CHURN_MONITOR
) {
1168 if (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
) {
1169 port
->sm_churn_actor_state
= AD_NO_CHURN
;
1171 port
->churn_actor_count
++;
1172 port
->sm_churn_actor_state
= AD_CHURN
;
1175 if (port
->sm_churn_partner_timer_counter
&&
1176 !(--port
->sm_churn_partner_timer_counter
) &&
1177 port
->sm_churn_partner_state
== AD_CHURN_MONITOR
) {
1178 if (port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) {
1179 port
->sm_churn_partner_state
= AD_NO_CHURN
;
1181 port
->churn_partner_count
++;
1182 port
->sm_churn_partner_state
= AD_CHURN
;
1188 * ad_tx_machine - handle a port's tx state machine
1189 * @port: the port we're looking at
1191 static void ad_tx_machine(struct port
*port
)
1193 /* check if tx timer expired, to verify that we do not send more than
1194 * 3 packets per second
1196 if (port
->sm_tx_timer_counter
&& !(--port
->sm_tx_timer_counter
)) {
1197 /* check if there is something to send */
1198 if (port
->ntt
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1199 __update_lacpdu_from_port(port
);
1201 if (ad_lacpdu_send(port
) >= 0) {
1202 pr_debug("Sent LACPDU on port %d\n",
1203 port
->actor_port_number
);
1205 /* mark ntt as false, so it will not be sent
1206 * again until demanded
1211 /* restart tx timer(to verify that we will not exceed
1212 * AD_MAX_TX_IN_SECOND
1214 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1219 * ad_periodic_machine - handle a port's periodic state machine
1220 * @port: the port we're looking at
1222 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1224 static void ad_periodic_machine(struct port
*port
)
1226 periodic_states_t last_state
;
1228 /* keep current state machine state to compare later if it was changed */
1229 last_state
= port
->sm_periodic_state
;
1231 /* check if port was reinitialized */
1232 if (((port
->sm_vars
& AD_PORT_BEGIN
) || !(port
->sm_vars
& AD_PORT_LACP_ENABLED
) || !port
->is_enabled
) ||
1233 (!(port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
) && !(port
->partner_oper
.port_state
& AD_STATE_LACP_ACTIVITY
))
1235 port
->sm_periodic_state
= AD_NO_PERIODIC
;
1237 /* check if state machine should change state */
1238 else if (port
->sm_periodic_timer_counter
) {
1239 /* check if periodic state machine expired */
1240 if (!(--port
->sm_periodic_timer_counter
)) {
1241 /* if expired then do tx */
1242 port
->sm_periodic_state
= AD_PERIODIC_TX
;
1244 /* If not expired, check if there is some new timeout
1245 * parameter from the partner state
1247 switch (port
->sm_periodic_state
) {
1248 case AD_FAST_PERIODIC
:
1249 if (!(port
->partner_oper
.port_state
1250 & AD_STATE_LACP_TIMEOUT
))
1251 port
->sm_periodic_state
= AD_SLOW_PERIODIC
;
1253 case AD_SLOW_PERIODIC
:
1254 if ((port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1255 port
->sm_periodic_timer_counter
= 0;
1256 port
->sm_periodic_state
= AD_PERIODIC_TX
;
1264 switch (port
->sm_periodic_state
) {
1265 case AD_NO_PERIODIC
:
1266 port
->sm_periodic_state
= AD_FAST_PERIODIC
;
1268 case AD_PERIODIC_TX
:
1269 if (!(port
->partner_oper
.port_state
&
1270 AD_STATE_LACP_TIMEOUT
))
1271 port
->sm_periodic_state
= AD_SLOW_PERIODIC
;
1273 port
->sm_periodic_state
= AD_FAST_PERIODIC
;
1280 /* check if the state machine was changed */
1281 if (port
->sm_periodic_state
!= last_state
) {
1282 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1283 port
->actor_port_number
, last_state
,
1284 port
->sm_periodic_state
);
1285 switch (port
->sm_periodic_state
) {
1286 case AD_NO_PERIODIC
:
1287 port
->sm_periodic_timer_counter
= 0;
1289 case AD_FAST_PERIODIC
:
1290 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1291 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_FAST_PERIODIC_TIME
))-1;
1293 case AD_SLOW_PERIODIC
:
1294 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1295 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_SLOW_PERIODIC_TIME
))-1;
1297 case AD_PERIODIC_TX
:
1307 * ad_port_selection_logic - select aggregation groups
1308 * @port: the port we're looking at
1309 * @update_slave_arr: Does slave array need update?
1311 * Select aggregation groups, and assign each port for it's aggregetor. The
1312 * selection logic is called in the inititalization (after all the handshkes),
1313 * and after every lacpdu receive (if selected is off).
1315 static void ad_port_selection_logic(struct port
*port
, bool *update_slave_arr
)
1317 struct aggregator
*aggregator
, *free_aggregator
= NULL
, *temp_aggregator
;
1318 struct port
*last_port
= NULL
, *curr_port
;
1319 struct list_head
*iter
;
1320 struct bonding
*bond
;
1321 struct slave
*slave
;
1324 /* if the port is already Selected, do nothing */
1325 if (port
->sm_vars
& AD_PORT_SELECTED
)
1328 bond
= __get_bond_by_port(port
);
1330 /* if the port is connected to other aggregator, detach it */
1331 if (port
->aggregator
) {
1332 /* detach the port from its former aggregator */
1333 temp_aggregator
= port
->aggregator
;
1334 for (curr_port
= temp_aggregator
->lag_ports
; curr_port
;
1335 last_port
= curr_port
,
1336 curr_port
= curr_port
->next_port_in_aggregator
) {
1337 if (curr_port
== port
) {
1338 temp_aggregator
->num_of_ports
--;
1339 /* if it is the first port attached to the
1343 temp_aggregator
->lag_ports
=
1344 port
->next_port_in_aggregator
;
1346 /* not the first port attached to the
1349 last_port
->next_port_in_aggregator
=
1350 port
->next_port_in_aggregator
;
1353 /* clear the port's relations to this
1356 port
->aggregator
= NULL
;
1357 port
->next_port_in_aggregator
= NULL
;
1358 port
->actor_port_aggregator_identifier
= 0;
1360 netdev_dbg(bond
->dev
, "Port %d left LAG %d\n",
1361 port
->actor_port_number
,
1362 temp_aggregator
->aggregator_identifier
);
1363 /* if the aggregator is empty, clear its
1364 * parameters, and set it ready to be attached
1366 if (!temp_aggregator
->lag_ports
)
1367 ad_clear_agg(temp_aggregator
);
1372 /* meaning: the port was related to an aggregator
1373 * but was not on the aggregator port list
1375 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1376 port
->slave
->bond
->dev
->name
,
1377 port
->actor_port_number
,
1378 port
->slave
->dev
->name
,
1379 port
->aggregator
->aggregator_identifier
);
1382 /* search on all aggregators for a suitable aggregator for this port */
1383 bond_for_each_slave(bond
, slave
, iter
) {
1384 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1386 /* keep a free aggregator for later use(if needed) */
1387 if (!aggregator
->lag_ports
) {
1388 if (!free_aggregator
)
1389 free_aggregator
= aggregator
;
1392 /* check if current aggregator suits us */
1393 if (((aggregator
->actor_oper_aggregator_key
== port
->actor_oper_port_key
) && /* if all parameters match AND */
1394 MAC_ADDRESS_EQUAL(&(aggregator
->partner_system
), &(port
->partner_oper
.system
)) &&
1395 (aggregator
->partner_system_priority
== port
->partner_oper
.system_priority
) &&
1396 (aggregator
->partner_oper_aggregator_key
== port
->partner_oper
.key
)
1398 ((!MAC_ADDRESS_EQUAL(&(port
->partner_oper
.system
), &(null_mac_addr
)) && /* partner answers */
1399 !aggregator
->is_individual
) /* but is not individual OR */
1402 /* attach to the founded aggregator */
1403 port
->aggregator
= aggregator
;
1404 port
->actor_port_aggregator_identifier
=
1405 port
->aggregator
->aggregator_identifier
;
1406 port
->next_port_in_aggregator
= aggregator
->lag_ports
;
1407 port
->aggregator
->num_of_ports
++;
1408 aggregator
->lag_ports
= port
;
1409 netdev_dbg(bond
->dev
, "Port %d joined LAG %d(existing LAG)\n",
1410 port
->actor_port_number
,
1411 port
->aggregator
->aggregator_identifier
);
1413 /* mark this port as selected */
1414 port
->sm_vars
|= AD_PORT_SELECTED
;
1420 /* the port couldn't find an aggregator - attach it to a new
1424 if (free_aggregator
) {
1425 /* assign port a new aggregator */
1426 port
->aggregator
= free_aggregator
;
1427 port
->actor_port_aggregator_identifier
=
1428 port
->aggregator
->aggregator_identifier
;
1430 /* update the new aggregator's parameters
1431 * if port was responsed from the end-user
1433 if (port
->actor_oper_port_key
& AD_DUPLEX_KEY_MASKS
)
1434 /* if port is full duplex */
1435 port
->aggregator
->is_individual
= false;
1437 port
->aggregator
->is_individual
= true;
1439 port
->aggregator
->actor_admin_aggregator_key
=
1440 port
->actor_admin_port_key
;
1441 port
->aggregator
->actor_oper_aggregator_key
=
1442 port
->actor_oper_port_key
;
1443 port
->aggregator
->partner_system
=
1444 port
->partner_oper
.system
;
1445 port
->aggregator
->partner_system_priority
=
1446 port
->partner_oper
.system_priority
;
1447 port
->aggregator
->partner_oper_aggregator_key
= port
->partner_oper
.key
;
1448 port
->aggregator
->receive_state
= 1;
1449 port
->aggregator
->transmit_state
= 1;
1450 port
->aggregator
->lag_ports
= port
;
1451 port
->aggregator
->num_of_ports
++;
1453 /* mark this port as selected */
1454 port
->sm_vars
|= AD_PORT_SELECTED
;
1456 netdev_dbg(bond
->dev
, "Port %d joined LAG %d(new LAG)\n",
1457 port
->actor_port_number
,
1458 port
->aggregator
->aggregator_identifier
);
1460 netdev_err(bond
->dev
, "Port %d (on %s) did not find a suitable aggregator\n",
1461 port
->actor_port_number
, port
->slave
->dev
->name
);
1464 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1465 * in all aggregator's ports, else set ready=FALSE in all
1466 * aggregator's ports
1468 __set_agg_ports_ready(port
->aggregator
,
1469 __agg_ports_are_ready(port
->aggregator
));
1471 aggregator
= __get_first_agg(port
);
1472 ad_agg_selection_logic(aggregator
, update_slave_arr
);
1474 if (!port
->aggregator
->is_active
)
1475 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1478 /* Decide if "agg" is a better choice for the new active aggregator that
1479 * the current best, according to the ad_select policy.
1481 static struct aggregator
*ad_agg_selection_test(struct aggregator
*best
,
1482 struct aggregator
*curr
)
1484 /* 0. If no best, select current.
1486 * 1. If the current agg is not individual, and the best is
1487 * individual, select current.
1489 * 2. If current agg is individual and the best is not, keep best.
1491 * 3. Therefore, current and best are both individual or both not
1494 * 3a. If current agg partner replied, and best agg partner did not,
1497 * 3b. If current agg partner did not reply and best agg partner
1498 * did reply, keep best.
1500 * 4. Therefore, current and best both have partner replies or
1501 * both do not, so perform selection policy:
1503 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1504 * select by bandwidth.
1506 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1511 if (!curr
->is_individual
&& best
->is_individual
)
1514 if (curr
->is_individual
&& !best
->is_individual
)
1517 if (__agg_has_partner(curr
) && !__agg_has_partner(best
))
1520 if (!__agg_has_partner(curr
) && __agg_has_partner(best
))
1523 switch (__get_agg_selection_mode(curr
->lag_ports
)) {
1525 if (curr
->num_of_ports
> best
->num_of_ports
)
1528 if (curr
->num_of_ports
< best
->num_of_ports
)
1532 case BOND_AD_STABLE
:
1533 case BOND_AD_BANDWIDTH
:
1534 if (__get_agg_bandwidth(curr
) > __get_agg_bandwidth(best
))
1540 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1541 curr
->slave
->bond
->dev
->name
,
1542 __get_agg_selection_mode(curr
->lag_ports
));
1549 static int agg_device_up(const struct aggregator
*agg
)
1551 struct port
*port
= agg
->lag_ports
;
1556 return netif_running(port
->slave
->dev
) &&
1557 netif_carrier_ok(port
->slave
->dev
);
1561 * ad_agg_selection_logic - select an aggregation group for a team
1562 * @aggregator: the aggregator we're looking at
1563 * @update_slave_arr: Does slave array need update?
1565 * It is assumed that only one aggregator may be selected for a team.
1567 * The logic of this function is to select the aggregator according to
1568 * the ad_select policy:
1570 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1571 * it, and to reselect the active aggregator only if the previous
1572 * aggregator has no more ports related to it.
1574 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1575 * bandwidth, and reselect whenever a link state change takes place or the
1576 * set of slaves in the bond changes.
1578 * BOND_AD_COUNT: select the aggregator with largest number of ports
1579 * (slaves), and reselect whenever a link state change takes place or the
1580 * set of slaves in the bond changes.
1582 * FIXME: this function MUST be called with the first agg in the bond, or
1583 * __get_active_agg() won't work correctly. This function should be better
1584 * called with the bond itself, and retrieve the first agg from it.
1586 static void ad_agg_selection_logic(struct aggregator
*agg
,
1587 bool *update_slave_arr
)
1589 struct aggregator
*best
, *active
, *origin
;
1590 struct bonding
*bond
= agg
->slave
->bond
;
1591 struct list_head
*iter
;
1592 struct slave
*slave
;
1597 active
= __get_active_agg(agg
);
1598 best
= (active
&& agg_device_up(active
)) ? active
: NULL
;
1600 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1601 agg
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1605 if (agg
->num_of_ports
&& agg_device_up(agg
))
1606 best
= ad_agg_selection_test(best
, agg
);
1610 __get_agg_selection_mode(best
->lag_ports
) == BOND_AD_STABLE
) {
1611 /* For the STABLE policy, don't replace the old active
1612 * aggregator if it's still active (it has an answering
1613 * partner) or if both the best and active don't have an
1614 * answering partner.
1616 if (active
&& active
->lag_ports
&&
1617 active
->lag_ports
->is_enabled
&&
1618 (__agg_has_partner(active
) ||
1619 (!__agg_has_partner(active
) &&
1620 !__agg_has_partner(best
)))) {
1621 if (!(!active
->actor_oper_aggregator_key
&&
1622 best
->actor_oper_aggregator_key
)) {
1624 active
->is_active
= 1;
1629 if (best
&& (best
== active
)) {
1631 active
->is_active
= 1;
1634 /* if there is new best aggregator, activate it */
1636 netdev_dbg(bond
->dev
, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1637 best
->aggregator_identifier
, best
->num_of_ports
,
1638 best
->actor_oper_aggregator_key
,
1639 best
->partner_oper_aggregator_key
,
1640 best
->is_individual
, best
->is_active
);
1641 netdev_dbg(bond
->dev
, "best ports %p slave %p %s\n",
1642 best
->lag_ports
, best
->slave
,
1643 best
->slave
? best
->slave
->dev
->name
: "NULL");
1645 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1646 agg
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1648 netdev_dbg(bond
->dev
, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1649 agg
->aggregator_identifier
, agg
->num_of_ports
,
1650 agg
->actor_oper_aggregator_key
,
1651 agg
->partner_oper_aggregator_key
,
1652 agg
->is_individual
, agg
->is_active
);
1655 /* check if any partner replys */
1656 if (best
->is_individual
) {
1657 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1659 best
->slave
->bond
->dev
->name
: "NULL");
1662 best
->is_active
= 1;
1663 netdev_dbg(bond
->dev
, "LAG %d chosen as the active LAG\n",
1664 best
->aggregator_identifier
);
1665 netdev_dbg(bond
->dev
, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1666 best
->aggregator_identifier
, best
->num_of_ports
,
1667 best
->actor_oper_aggregator_key
,
1668 best
->partner_oper_aggregator_key
,
1669 best
->is_individual
, best
->is_active
);
1671 /* disable the ports that were related to the former
1675 for (port
= active
->lag_ports
; port
;
1676 port
= port
->next_port_in_aggregator
) {
1677 __disable_port(port
);
1680 /* Slave array needs update. */
1681 *update_slave_arr
= true;
1684 /* if the selected aggregator is of join individuals
1685 * (partner_system is NULL), enable their ports
1687 active
= __get_active_agg(origin
);
1690 if (!__agg_has_partner(active
)) {
1691 for (port
= active
->lag_ports
; port
;
1692 port
= port
->next_port_in_aggregator
) {
1693 __enable_port(port
);
1700 bond_3ad_set_carrier(bond
);
1704 * ad_clear_agg - clear a given aggregator's parameters
1705 * @aggregator: the aggregator we're looking at
1707 static void ad_clear_agg(struct aggregator
*aggregator
)
1710 aggregator
->is_individual
= false;
1711 aggregator
->actor_admin_aggregator_key
= 0;
1712 aggregator
->actor_oper_aggregator_key
= 0;
1713 aggregator
->partner_system
= null_mac_addr
;
1714 aggregator
->partner_system_priority
= 0;
1715 aggregator
->partner_oper_aggregator_key
= 0;
1716 aggregator
->receive_state
= 0;
1717 aggregator
->transmit_state
= 0;
1718 aggregator
->lag_ports
= NULL
;
1719 aggregator
->is_active
= 0;
1720 aggregator
->num_of_ports
= 0;
1721 pr_debug("LAG %d was cleared\n",
1722 aggregator
->aggregator_identifier
);
1727 * ad_initialize_agg - initialize a given aggregator's parameters
1728 * @aggregator: the aggregator we're looking at
1730 static void ad_initialize_agg(struct aggregator
*aggregator
)
1733 ad_clear_agg(aggregator
);
1735 aggregator
->aggregator_mac_address
= null_mac_addr
;
1736 aggregator
->aggregator_identifier
= 0;
1737 aggregator
->slave
= NULL
;
1742 * ad_initialize_port - initialize a given port's parameters
1743 * @aggregator: the aggregator we're looking at
1744 * @lacp_fast: boolean. whether fast periodic should be used
1746 static void ad_initialize_port(struct port
*port
, int lacp_fast
)
1748 static const struct port_params tmpl
= {
1749 .system_priority
= 0xffff,
1752 .port_priority
= 0xff,
1755 static const struct lacpdu lacpdu
= {
1757 .version_number
= 0x01,
1758 .tlv_type_actor_info
= 0x01,
1759 .actor_information_length
= 0x14,
1760 .tlv_type_partner_info
= 0x02,
1761 .partner_information_length
= 0x14,
1762 .tlv_type_collector_info
= 0x03,
1763 .collector_information_length
= 0x10,
1764 .collector_max_delay
= htons(AD_COLLECTOR_MAX_DELAY
),
1768 port
->actor_port_priority
= 0xff;
1769 port
->actor_port_aggregator_identifier
= 0;
1771 port
->actor_admin_port_state
= AD_STATE_AGGREGATION
|
1772 AD_STATE_LACP_ACTIVITY
;
1773 port
->actor_oper_port_state
= AD_STATE_AGGREGATION
|
1774 AD_STATE_LACP_ACTIVITY
;
1777 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
1779 memcpy(&port
->partner_admin
, &tmpl
, sizeof(tmpl
));
1780 memcpy(&port
->partner_oper
, &tmpl
, sizeof(tmpl
));
1782 port
->is_enabled
= true;
1783 /* private parameters */
1784 port
->sm_vars
= AD_PORT_BEGIN
| AD_PORT_LACP_ENABLED
;
1785 port
->sm_rx_state
= 0;
1786 port
->sm_rx_timer_counter
= 0;
1787 port
->sm_periodic_state
= 0;
1788 port
->sm_periodic_timer_counter
= 0;
1789 port
->sm_mux_state
= 0;
1790 port
->sm_mux_timer_counter
= 0;
1791 port
->sm_tx_state
= 0;
1792 port
->aggregator
= NULL
;
1793 port
->next_port_in_aggregator
= NULL
;
1794 port
->transaction_id
= 0;
1796 port
->sm_churn_actor_timer_counter
= 0;
1797 port
->sm_churn_actor_state
= 0;
1798 port
->churn_actor_count
= 0;
1799 port
->sm_churn_partner_timer_counter
= 0;
1800 port
->sm_churn_partner_state
= 0;
1801 port
->churn_partner_count
= 0;
1803 memcpy(&port
->lacpdu
, &lacpdu
, sizeof(lacpdu
));
1808 * ad_enable_collecting_distributing - enable a port's transmit/receive
1809 * @port: the port we're looking at
1810 * @update_slave_arr: Does slave array need update?
1812 * Enable @port if it's in an active aggregator
1814 static void ad_enable_collecting_distributing(struct port
*port
,
1815 bool *update_slave_arr
)
1817 if (port
->aggregator
->is_active
) {
1818 pr_debug("Enabling port %d(LAG %d)\n",
1819 port
->actor_port_number
,
1820 port
->aggregator
->aggregator_identifier
);
1821 __enable_port(port
);
1822 /* Slave array needs update */
1823 *update_slave_arr
= true;
1828 * ad_disable_collecting_distributing - disable a port's transmit/receive
1829 * @port: the port we're looking at
1830 * @update_slave_arr: Does slave array need update?
1832 static void ad_disable_collecting_distributing(struct port
*port
,
1833 bool *update_slave_arr
)
1835 if (port
->aggregator
&&
1836 !MAC_ADDRESS_EQUAL(&(port
->aggregator
->partner_system
),
1837 &(null_mac_addr
))) {
1838 pr_debug("Disabling port %d(LAG %d)\n",
1839 port
->actor_port_number
,
1840 port
->aggregator
->aggregator_identifier
);
1841 __disable_port(port
);
1842 /* Slave array needs an update */
1843 *update_slave_arr
= true;
1848 * ad_marker_info_received - handle receive of a Marker information frame
1849 * @marker_info: Marker info received
1850 * @port: the port we're looking at
1852 static void ad_marker_info_received(struct bond_marker
*marker_info
,
1855 struct bond_marker marker
;
1857 /* copy the received marker data to the response marker */
1858 memcpy(&marker
, marker_info
, sizeof(struct bond_marker
));
1859 /* change the marker subtype to marker response */
1860 marker
.tlv_type
= AD_MARKER_RESPONSE_SUBTYPE
;
1862 /* send the marker response */
1863 if (ad_marker_send(port
, &marker
) >= 0) {
1864 pr_debug("Sent Marker Response on port %d\n",
1865 port
->actor_port_number
);
1870 * ad_marker_response_received - handle receive of a marker response frame
1871 * @marker: marker PDU received
1872 * @port: the port we're looking at
1874 * This function does nothing since we decided not to implement send and handle
1875 * response for marker PDU's, in this stage, but only to respond to marker
1878 static void ad_marker_response_received(struct bond_marker
*marker
,
1881 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1884 /* ========= AD exported functions to the main bonding code ========= */
1886 /* Check aggregators status in team every T seconds */
1887 #define AD_AGGREGATOR_SELECTION_TIMER 8
1890 * bond_3ad_initiate_agg_selection - initate aggregator selection
1891 * @bond: bonding struct
1893 * Set the aggregation selection timer, to initiate an agg selection in
1894 * the very near future. Called during first initialization, and during
1895 * any down to up transitions of the bond.
1897 void bond_3ad_initiate_agg_selection(struct bonding
*bond
, int timeout
)
1899 BOND_AD_INFO(bond
).agg_select_timer
= timeout
;
1903 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1904 * @bond: bonding struct to work on
1905 * @tick_resolution: tick duration (millisecond resolution)
1907 * Can be called only after the mac address of the bond is set.
1909 void bond_3ad_initialize(struct bonding
*bond
, u16 tick_resolution
)
1911 /* check that the bond is not initialized yet */
1912 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond
).system
.sys_mac_addr
),
1913 bond
->dev
->dev_addr
)) {
1915 BOND_AD_INFO(bond
).aggregator_identifier
= 0;
1917 BOND_AD_INFO(bond
).system
.sys_priority
=
1918 bond
->params
.ad_actor_sys_prio
;
1919 if (is_zero_ether_addr(bond
->params
.ad_actor_system
))
1920 BOND_AD_INFO(bond
).system
.sys_mac_addr
=
1921 *((struct mac_addr
*)bond
->dev
->dev_addr
);
1923 BOND_AD_INFO(bond
).system
.sys_mac_addr
=
1924 *((struct mac_addr
*)bond
->params
.ad_actor_system
);
1926 /* initialize how many times this module is called in one
1927 * second (should be about every 100ms)
1929 ad_ticks_per_sec
= tick_resolution
;
1931 bond_3ad_initiate_agg_selection(bond
,
1932 AD_AGGREGATOR_SELECTION_TIMER
*
1938 * bond_3ad_bind_slave - initialize a slave's port
1939 * @slave: slave struct to work on
1941 * Returns: 0 on success
1944 void bond_3ad_bind_slave(struct slave
*slave
)
1946 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1948 struct aggregator
*aggregator
;
1950 /* check that the slave has not been initialized yet. */
1951 if (SLAVE_AD_INFO(slave
)->port
.slave
!= slave
) {
1953 /* port initialization */
1954 port
= &(SLAVE_AD_INFO(slave
)->port
);
1956 ad_initialize_port(port
, bond
->params
.lacp_fast
);
1958 port
->slave
= slave
;
1959 port
->actor_port_number
= SLAVE_AD_INFO(slave
)->id
;
1960 /* key is determined according to the link speed, duplex and
1963 port
->actor_admin_port_key
= bond
->params
.ad_user_port_key
<< 6;
1964 ad_update_actor_keys(port
, false);
1965 /* actor system is the bond's system */
1966 port
->actor_system
= BOND_AD_INFO(bond
).system
.sys_mac_addr
;
1967 port
->actor_system_priority
=
1968 BOND_AD_INFO(bond
).system
.sys_priority
;
1969 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1970 * lacpdu's are sent in one second)
1972 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1974 __disable_port(port
);
1976 /* aggregator initialization */
1977 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1979 ad_initialize_agg(aggregator
);
1981 aggregator
->aggregator_mac_address
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1982 aggregator
->aggregator_identifier
= ++BOND_AD_INFO(bond
).aggregator_identifier
;
1983 aggregator
->slave
= slave
;
1984 aggregator
->is_active
= 0;
1985 aggregator
->num_of_ports
= 0;
1990 * bond_3ad_unbind_slave - deinitialize a slave's port
1991 * @slave: slave struct to work on
1993 * Search for the aggregator that is related to this port, remove the
1994 * aggregator and assign another aggregator for other port related to it
1995 * (if any), and remove the port.
1997 void bond_3ad_unbind_slave(struct slave
*slave
)
1999 struct port
*port
, *prev_port
, *temp_port
;
2000 struct aggregator
*aggregator
, *new_aggregator
, *temp_aggregator
;
2001 int select_new_active_agg
= 0;
2002 struct bonding
*bond
= slave
->bond
;
2003 struct slave
*slave_iter
;
2004 struct list_head
*iter
;
2005 bool dummy_slave_update
; /* Ignore this value as caller updates array */
2007 /* Sync against bond_3ad_state_machine_handler() */
2008 spin_lock_bh(&bond
->mode_lock
);
2009 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
2010 port
= &(SLAVE_AD_INFO(slave
)->port
);
2012 /* if slave is null, the whole port is not initialized */
2014 netdev_warn(bond
->dev
, "Trying to unbind an uninitialized port on %s\n",
2019 netdev_dbg(bond
->dev
, "Unbinding Link Aggregation Group %d\n",
2020 aggregator
->aggregator_identifier
);
2022 /* Tell the partner that this port is not suitable for aggregation */
2023 port
->actor_oper_port_state
&= ~AD_STATE_AGGREGATION
;
2024 __update_lacpdu_from_port(port
);
2025 ad_lacpdu_send(port
);
2027 /* check if this aggregator is occupied */
2028 if (aggregator
->lag_ports
) {
2029 /* check if there are other ports related to this aggregator
2030 * except the port related to this slave(thats ensure us that
2031 * there is a reason to search for new aggregator, and that we
2034 if ((aggregator
->lag_ports
!= port
) ||
2035 (aggregator
->lag_ports
->next_port_in_aggregator
)) {
2036 /* find new aggregator for the related port(s) */
2037 bond_for_each_slave(bond
, slave_iter
, iter
) {
2038 new_aggregator
= &(SLAVE_AD_INFO(slave_iter
)->aggregator
);
2039 /* if the new aggregator is empty, or it is
2040 * connected to our port only
2042 if (!new_aggregator
->lag_ports
||
2043 ((new_aggregator
->lag_ports
== port
) &&
2044 !new_aggregator
->lag_ports
->next_port_in_aggregator
))
2048 new_aggregator
= NULL
;
2050 /* if new aggregator found, copy the aggregator's
2051 * parameters and connect the related lag_ports to the
2054 if ((new_aggregator
) && ((!new_aggregator
->lag_ports
) || ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
))) {
2055 netdev_dbg(bond
->dev
, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2056 aggregator
->aggregator_identifier
,
2057 new_aggregator
->aggregator_identifier
);
2059 if ((new_aggregator
->lag_ports
== port
) &&
2060 new_aggregator
->is_active
) {
2061 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2062 select_new_active_agg
= 1;
2065 new_aggregator
->is_individual
= aggregator
->is_individual
;
2066 new_aggregator
->actor_admin_aggregator_key
= aggregator
->actor_admin_aggregator_key
;
2067 new_aggregator
->actor_oper_aggregator_key
= aggregator
->actor_oper_aggregator_key
;
2068 new_aggregator
->partner_system
= aggregator
->partner_system
;
2069 new_aggregator
->partner_system_priority
= aggregator
->partner_system_priority
;
2070 new_aggregator
->partner_oper_aggregator_key
= aggregator
->partner_oper_aggregator_key
;
2071 new_aggregator
->receive_state
= aggregator
->receive_state
;
2072 new_aggregator
->transmit_state
= aggregator
->transmit_state
;
2073 new_aggregator
->lag_ports
= aggregator
->lag_ports
;
2074 new_aggregator
->is_active
= aggregator
->is_active
;
2075 new_aggregator
->num_of_ports
= aggregator
->num_of_ports
;
2077 /* update the information that is written on
2078 * the ports about the aggregator
2080 for (temp_port
= aggregator
->lag_ports
; temp_port
;
2081 temp_port
= temp_port
->next_port_in_aggregator
) {
2082 temp_port
->aggregator
= new_aggregator
;
2083 temp_port
->actor_port_aggregator_identifier
= new_aggregator
->aggregator_identifier
;
2086 ad_clear_agg(aggregator
);
2088 if (select_new_active_agg
)
2089 ad_agg_selection_logic(__get_first_agg(port
),
2090 &dummy_slave_update
);
2092 netdev_warn(bond
->dev
, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2095 /* in case that the only port related to this
2096 * aggregator is the one we want to remove
2098 select_new_active_agg
= aggregator
->is_active
;
2099 ad_clear_agg(aggregator
);
2100 if (select_new_active_agg
) {
2101 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2102 /* select new active aggregator */
2103 temp_aggregator
= __get_first_agg(port
);
2104 if (temp_aggregator
)
2105 ad_agg_selection_logic(temp_aggregator
,
2106 &dummy_slave_update
);
2111 netdev_dbg(bond
->dev
, "Unbinding port %d\n", port
->actor_port_number
);
2113 /* find the aggregator that this port is connected to */
2114 bond_for_each_slave(bond
, slave_iter
, iter
) {
2115 temp_aggregator
= &(SLAVE_AD_INFO(slave_iter
)->aggregator
);
2117 /* search the port in the aggregator's related ports */
2118 for (temp_port
= temp_aggregator
->lag_ports
; temp_port
;
2119 prev_port
= temp_port
,
2120 temp_port
= temp_port
->next_port_in_aggregator
) {
2121 if (temp_port
== port
) {
2122 /* the aggregator found - detach the port from
2126 prev_port
->next_port_in_aggregator
= temp_port
->next_port_in_aggregator
;
2128 temp_aggregator
->lag_ports
= temp_port
->next_port_in_aggregator
;
2129 temp_aggregator
->num_of_ports
--;
2130 if (temp_aggregator
->num_of_ports
== 0) {
2131 select_new_active_agg
= temp_aggregator
->is_active
;
2132 ad_clear_agg(temp_aggregator
);
2133 if (select_new_active_agg
) {
2134 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2135 /* select new active aggregator */
2136 ad_agg_selection_logic(__get_first_agg(port
),
2137 &dummy_slave_update
);
2147 spin_unlock_bh(&bond
->mode_lock
);
2151 * bond_3ad_state_machine_handler - handle state machines timeout
2152 * @bond: bonding struct to work on
2154 * The state machine handling concept in this module is to check every tick
2155 * which state machine should operate any function. The execution order is
2156 * round robin, so when we have an interaction between state machines, the
2157 * reply of one to each other might be delayed until next tick.
2159 * This function also complete the initialization when the agg_select_timer
2160 * times out, and it selects an aggregator for the ports that are yet not
2161 * related to any aggregator, and selects the active aggregator for a bond.
2163 void bond_3ad_state_machine_handler(struct work_struct
*work
)
2165 struct bonding
*bond
= container_of(work
, struct bonding
,
2167 struct aggregator
*aggregator
;
2168 struct list_head
*iter
;
2169 struct slave
*slave
;
2171 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
2172 bool update_slave_arr
= false;
2174 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2175 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2176 * concurrently due to incoming LACPDU as well.
2178 spin_lock_bh(&bond
->mode_lock
);
2181 /* check if there are any slaves */
2182 if (!bond_has_slaves(bond
))
2185 /* check if agg_select_timer timer after initialize is timed out */
2186 if (BOND_AD_INFO(bond
).agg_select_timer
&&
2187 !(--BOND_AD_INFO(bond
).agg_select_timer
)) {
2188 slave
= bond_first_slave_rcu(bond
);
2189 port
= slave
? &(SLAVE_AD_INFO(slave
)->port
) : NULL
;
2191 /* select the active aggregator for the bond */
2194 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2199 aggregator
= __get_first_agg(port
);
2200 ad_agg_selection_logic(aggregator
, &update_slave_arr
);
2202 bond_3ad_set_carrier(bond
);
2205 /* for each port run the state machines */
2206 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2207 port
= &(SLAVE_AD_INFO(slave
)->port
);
2209 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2214 ad_rx_machine(NULL
, port
);
2215 ad_periodic_machine(port
);
2216 ad_port_selection_logic(port
, &update_slave_arr
);
2217 ad_mux_machine(port
, &update_slave_arr
);
2218 ad_tx_machine(port
);
2219 ad_churn_machine(port
);
2221 /* turn off the BEGIN bit, since we already handled it */
2222 if (port
->sm_vars
& AD_PORT_BEGIN
)
2223 port
->sm_vars
&= ~AD_PORT_BEGIN
;
2227 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2228 if (slave
->should_notify
) {
2229 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
2234 spin_unlock_bh(&bond
->mode_lock
);
2236 if (update_slave_arr
)
2237 bond_slave_arr_work_rearm(bond
, 0);
2239 if (should_notify_rtnl
&& rtnl_trylock()) {
2240 bond_slave_state_notify(bond
);
2243 queue_delayed_work(bond
->wq
, &bond
->ad_work
, ad_delta_in_ticks
);
2247 * bond_3ad_rx_indication - handle a received frame
2248 * @lacpdu: received lacpdu
2249 * @slave: slave struct to work on
2250 * @length: length of the data received
2252 * It is assumed that frames that were sent on this NIC don't returned as new
2253 * received frames (loopback). Since only the payload is given to this
2254 * function, it check for loopback.
2256 static int bond_3ad_rx_indication(struct lacpdu
*lacpdu
, struct slave
*slave
,
2260 int ret
= RX_HANDLER_ANOTHER
;
2262 if (length
>= sizeof(struct lacpdu
)) {
2264 port
= &(SLAVE_AD_INFO(slave
)->port
);
2267 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2268 slave
->dev
->name
, slave
->bond
->dev
->name
);
2272 switch (lacpdu
->subtype
) {
2273 case AD_TYPE_LACPDU
:
2274 ret
= RX_HANDLER_CONSUMED
;
2275 netdev_dbg(slave
->bond
->dev
,
2276 "Received LACPDU on port %d slave %s\n",
2277 port
->actor_port_number
,
2279 /* Protect against concurrent state machines */
2280 spin_lock(&slave
->bond
->mode_lock
);
2281 ad_rx_machine(lacpdu
, port
);
2282 spin_unlock(&slave
->bond
->mode_lock
);
2285 case AD_TYPE_MARKER
:
2286 ret
= RX_HANDLER_CONSUMED
;
2287 /* No need to convert fields to Little Endian since we
2288 * don't use the marker's fields.
2291 switch (((struct bond_marker
*)lacpdu
)->tlv_type
) {
2292 case AD_MARKER_INFORMATION_SUBTYPE
:
2293 netdev_dbg(slave
->bond
->dev
, "Received Marker Information on port %d\n",
2294 port
->actor_port_number
);
2295 ad_marker_info_received((struct bond_marker
*)lacpdu
, port
);
2298 case AD_MARKER_RESPONSE_SUBTYPE
:
2299 netdev_dbg(slave
->bond
->dev
, "Received Marker Response on port %d\n",
2300 port
->actor_port_number
);
2301 ad_marker_response_received((struct bond_marker
*)lacpdu
, port
);
2305 netdev_dbg(slave
->bond
->dev
, "Received an unknown Marker subtype on slot %d\n",
2306 port
->actor_port_number
);
2314 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2315 * its current speed and duplex settings.
2317 * @port: the port we'are looking at
2318 * @reset: Boolean to just reset the speed and the duplex part of the key
2320 * The logic to change the oper / admin keys is:
2321 * (a) A full duplex port can participate in LACP with partner.
2322 * (b) When the speed is changed, LACP need to be reinitiated.
2324 static void ad_update_actor_keys(struct port
*port
, bool reset
)
2327 u16 ospeed
= 0, speed
= 0;
2328 u16 old_oper_key
= port
->actor_oper_port_key
;
2330 port
->actor_admin_port_key
&= ~(AD_SPEED_KEY_MASKS
|AD_DUPLEX_KEY_MASKS
);
2332 speed
= __get_link_speed(port
);
2333 ospeed
= (old_oper_key
& AD_SPEED_KEY_MASKS
) >> 1;
2334 duplex
= __get_duplex(port
);
2335 port
->actor_admin_port_key
|= (speed
<< 1) | duplex
;
2337 port
->actor_oper_port_key
= port
->actor_admin_port_key
;
2339 if (old_oper_key
!= port
->actor_oper_port_key
) {
2340 /* Only 'duplex' port participates in LACP */
2342 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
2344 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
2348 netdev_err(port
->slave
->dev
,
2349 "speed changed to 0 for port %s",
2350 port
->slave
->dev
->name
);
2351 } else if (duplex
&& ospeed
!= speed
) {
2352 /* Speed change restarts LACP state-machine */
2353 port
->sm_vars
|= AD_PORT_BEGIN
;
2360 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2363 * @slave: slave struct to work on
2365 * Handle reselection of aggregator (if needed) for this port.
2367 void bond_3ad_adapter_speed_duplex_changed(struct slave
*slave
)
2371 port
= &(SLAVE_AD_INFO(slave
)->port
);
2373 /* if slave is null, the whole port is not initialized */
2375 netdev_warn(slave
->bond
->dev
,
2376 "speed/duplex changed for uninitialized port %s\n",
2381 spin_lock_bh(&slave
->bond
->mode_lock
);
2382 ad_update_actor_keys(port
, false);
2383 netdev_dbg(slave
->bond
->dev
, "Port %d slave %s changed speed/duplex\n",
2384 port
->actor_port_number
, slave
->dev
->name
);
2385 spin_unlock_bh(&slave
->bond
->mode_lock
);
2389 * bond_3ad_handle_link_change - handle a slave's link status change indication
2390 * @slave: slave struct to work on
2391 * @status: whether the link is now up or down
2393 * Handle reselection of aggregator (if needed) for this port.
2395 void bond_3ad_handle_link_change(struct slave
*slave
, char link
)
2399 port
= &(SLAVE_AD_INFO(slave
)->port
);
2401 /* if slave is null, the whole port is not initialized */
2403 netdev_warn(slave
->bond
->dev
, "link status changed for uninitialized port on %s\n",
2408 spin_lock_bh(&slave
->bond
->mode_lock
);
2409 /* on link down we are zeroing duplex and speed since
2410 * some of the adaptors(ce1000.lan) report full duplex/speed
2411 * instead of N/A(duplex) / 0(speed).
2413 * on link up we are forcing recheck on the duplex and speed since
2414 * some of he adaptors(ce1000.lan) report.
2416 if (link
== BOND_LINK_UP
) {
2417 port
->is_enabled
= true;
2418 ad_update_actor_keys(port
, false);
2420 /* link has failed */
2421 port
->is_enabled
= false;
2422 ad_update_actor_keys(port
, true);
2424 netdev_dbg(slave
->bond
->dev
, "Port %d changed link status to %s\n",
2425 port
->actor_port_number
,
2426 link
== BOND_LINK_UP
? "UP" : "DOWN");
2428 spin_unlock_bh(&slave
->bond
->mode_lock
);
2430 /* RTNL is held and mode_lock is released so it's safe
2431 * to update slave_array here.
2433 bond_update_slave_arr(slave
->bond
, NULL
);
2437 * bond_3ad_set_carrier - set link state for bonding master
2438 * @bond - bonding structure
2440 * if we have an active aggregator, we're up, if not, we're down.
2441 * Presumes that we cannot have an active aggregator if there are
2442 * no slaves with link up.
2444 * This behavior complies with IEEE 802.3 section 43.3.9.
2446 * Called by bond_set_carrier(). Return zero if carrier state does not
2447 * change, nonzero if it does.
2449 int bond_3ad_set_carrier(struct bonding
*bond
)
2451 struct aggregator
*active
;
2452 struct slave
*first_slave
;
2456 first_slave
= bond_first_slave_rcu(bond
);
2461 active
= __get_active_agg(&(SLAVE_AD_INFO(first_slave
)->aggregator
));
2463 /* are enough slaves available to consider link up? */
2464 if (active
->num_of_ports
< bond
->params
.min_links
) {
2465 if (netif_carrier_ok(bond
->dev
)) {
2466 netif_carrier_off(bond
->dev
);
2469 } else if (!netif_carrier_ok(bond
->dev
)) {
2470 netif_carrier_on(bond
->dev
);
2473 } else if (netif_carrier_ok(bond
->dev
)) {
2474 netif_carrier_off(bond
->dev
);
2482 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2483 * @bond: bonding struct to work on
2484 * @ad_info: ad_info struct to fill with the bond's info
2486 * Returns: 0 on success
2489 int __bond_3ad_get_active_agg_info(struct bonding
*bond
,
2490 struct ad_info
*ad_info
)
2492 struct aggregator
*aggregator
= NULL
;
2493 struct list_head
*iter
;
2494 struct slave
*slave
;
2497 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2498 port
= &(SLAVE_AD_INFO(slave
)->port
);
2499 if (port
->aggregator
&& port
->aggregator
->is_active
) {
2500 aggregator
= port
->aggregator
;
2508 ad_info
->aggregator_id
= aggregator
->aggregator_identifier
;
2509 ad_info
->ports
= aggregator
->num_of_ports
;
2510 ad_info
->actor_key
= aggregator
->actor_oper_aggregator_key
;
2511 ad_info
->partner_key
= aggregator
->partner_oper_aggregator_key
;
2512 ether_addr_copy(ad_info
->partner_system
,
2513 aggregator
->partner_system
.mac_addr_value
);
2517 int bond_3ad_get_active_agg_info(struct bonding
*bond
, struct ad_info
*ad_info
)
2522 ret
= __bond_3ad_get_active_agg_info(bond
, ad_info
);
2528 int bond_3ad_lacpdu_recv(const struct sk_buff
*skb
, struct bonding
*bond
,
2529 struct slave
*slave
)
2531 struct lacpdu
*lacpdu
, _lacpdu
;
2533 if (skb
->protocol
!= PKT_TYPE_LACPDU
)
2534 return RX_HANDLER_ANOTHER
;
2536 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb
)->h_dest
, lacpdu_mcast_addr
))
2537 return RX_HANDLER_ANOTHER
;
2539 lacpdu
= skb_header_pointer(skb
, 0, sizeof(_lacpdu
), &_lacpdu
);
2541 return RX_HANDLER_ANOTHER
;
2543 return bond_3ad_rx_indication(lacpdu
, slave
, skb
->len
);
2547 * bond_3ad_update_lacp_rate - change the lacp rate
2548 * @bond - bonding struct
2550 * When modify lacp_rate parameter via sysfs,
2551 * update actor_oper_port_state of each port.
2553 * Hold bond->mode_lock,
2554 * so we can modify port->actor_oper_port_state,
2555 * no matter bond is up or down.
2557 void bond_3ad_update_lacp_rate(struct bonding
*bond
)
2559 struct port
*port
= NULL
;
2560 struct list_head
*iter
;
2561 struct slave
*slave
;
2564 lacp_fast
= bond
->params
.lacp_fast
;
2565 spin_lock_bh(&bond
->mode_lock
);
2566 bond_for_each_slave(bond
, slave
, iter
) {
2567 port
= &(SLAVE_AD_INFO(slave
)->port
);
2569 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
2571 port
->actor_oper_port_state
&= ~AD_STATE_LACP_TIMEOUT
;
2573 spin_unlock_bh(&bond
->mode_lock
);