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
99 /* compare MAC addresses */
100 #define MAC_ADDRESS_EQUAL(A, B) \
101 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
103 static struct mac_addr null_mac_addr
= { { 0, 0, 0, 0, 0, 0 } };
104 static u16 ad_ticks_per_sec
;
105 static const int ad_delta_in_ticks
= (AD_TIMER_INTERVAL
* HZ
) / 1000;
107 static const u8 lacpdu_mcast_addr
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
109 /* ================= main 802.3ad protocol functions ================== */
110 static int ad_lacpdu_send(struct port
*port
);
111 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
);
112 static void ad_mux_machine(struct port
*port
, bool *update_slave_arr
);
113 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
);
114 static void ad_tx_machine(struct port
*port
);
115 static void ad_periodic_machine(struct port
*port
);
116 static void ad_port_selection_logic(struct port
*port
, bool *update_slave_arr
);
117 static void ad_agg_selection_logic(struct aggregator
*aggregator
,
118 bool *update_slave_arr
);
119 static void ad_clear_agg(struct aggregator
*aggregator
);
120 static void ad_initialize_agg(struct aggregator
*aggregator
);
121 static void ad_initialize_port(struct port
*port
, int lacp_fast
);
122 static void ad_enable_collecting_distributing(struct port
*port
,
123 bool *update_slave_arr
);
124 static void ad_disable_collecting_distributing(struct port
*port
,
125 bool *update_slave_arr
);
126 static void ad_marker_info_received(struct bond_marker
*marker_info
,
128 static void ad_marker_response_received(struct bond_marker
*marker
,
130 static void ad_update_actor_keys(struct port
*port
, bool reset
);
133 /* ================= api to bonding and kernel code ================== */
136 * __get_bond_by_port - get the port's bonding struct
137 * @port: the port we're looking at
139 * Return @port's bonding struct, or %NULL if it can't be found.
141 static inline struct bonding
*__get_bond_by_port(struct port
*port
)
143 if (port
->slave
== NULL
)
146 return bond_get_bond_by_slave(port
->slave
);
150 * __get_first_agg - get the first aggregator in the bond
151 * @bond: the bond we're looking at
153 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
155 * The caller must hold RCU or RTNL lock.
157 static inline struct aggregator
*__get_first_agg(struct port
*port
)
159 struct bonding
*bond
= __get_bond_by_port(port
);
160 struct slave
*first_slave
;
161 struct aggregator
*agg
;
163 /* If there's no bond for this port, or bond has no slaves */
168 first_slave
= bond_first_slave_rcu(bond
);
169 agg
= first_slave
? &(SLAVE_AD_INFO(first_slave
)->aggregator
) : NULL
;
176 * __agg_has_partner - see if we have a partner
177 * @agg: the agregator we're looking at
179 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
180 * address for the partner). Return 0 if not.
182 static inline int __agg_has_partner(struct aggregator
*agg
)
184 return !is_zero_ether_addr(agg
->partner_system
.mac_addr_value
);
188 * __disable_port - disable the port's slave
189 * @port: the port we're looking at
191 static inline void __disable_port(struct port
*port
)
193 bond_set_slave_inactive_flags(port
->slave
, BOND_SLAVE_NOTIFY_LATER
);
197 * __enable_port - enable the port's slave, if it's up
198 * @port: the port we're looking at
200 static inline void __enable_port(struct port
*port
)
202 struct slave
*slave
= port
->slave
;
204 if ((slave
->link
== BOND_LINK_UP
) && bond_slave_is_up(slave
))
205 bond_set_slave_active_flags(slave
, BOND_SLAVE_NOTIFY_LATER
);
209 * __port_is_enabled - check if the port's slave is in active state
210 * @port: the port we're looking at
212 static inline int __port_is_enabled(struct port
*port
)
214 return bond_is_active_slave(port
->slave
);
218 * __get_agg_selection_mode - get the aggregator selection mode
219 * @port: the port we're looking at
221 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
223 static inline u32
__get_agg_selection_mode(struct port
*port
)
225 struct bonding
*bond
= __get_bond_by_port(port
);
228 return BOND_AD_STABLE
;
230 return bond
->params
.ad_select
;
234 * __check_agg_selection_timer - check if the selection timer has expired
235 * @port: the port we're looking at
237 static inline int __check_agg_selection_timer(struct port
*port
)
239 struct bonding
*bond
= __get_bond_by_port(port
);
244 return BOND_AD_INFO(bond
).agg_select_timer
? 1 : 0;
248 * __get_link_speed - get a port's speed
249 * @port: the port we're looking at
251 * Return @port's speed in 802.3ad enum format. i.e. one of:
253 * %AD_LINK_SPEED_10MBPS,
254 * %AD_LINK_SPEED_100MBPS,
255 * %AD_LINK_SPEED_1000MBPS,
256 * %AD_LINK_SPEED_2500MBPS,
257 * %AD_LINK_SPEED_10000MBPS
258 * %AD_LINK_SPEED_20000MBPS
259 * %AD_LINK_SPEED_40000MBPS
260 * %AD_LINK_SPEED_56000MBPS
262 static u16
__get_link_speed(struct port
*port
)
264 struct slave
*slave
= port
->slave
;
267 /* this if covers only a special case: when the configuration starts
268 * with link down, it sets the speed to 0.
269 * This is done in spite of the fact that the e100 driver reports 0
270 * to be compatible with MVT in the future.
272 if (slave
->link
!= BOND_LINK_UP
)
275 switch (slave
->speed
) {
277 speed
= AD_LINK_SPEED_10MBPS
;
281 speed
= AD_LINK_SPEED_100MBPS
;
285 speed
= AD_LINK_SPEED_1000MBPS
;
289 speed
= AD_LINK_SPEED_2500MBPS
;
293 speed
= AD_LINK_SPEED_10000MBPS
;
297 speed
= AD_LINK_SPEED_20000MBPS
;
301 speed
= AD_LINK_SPEED_40000MBPS
;
305 speed
= AD_LINK_SPEED_56000MBPS
;
309 /* unknown speed value from ethtool. shouldn't happen */
315 netdev_dbg(slave
->bond
->dev
, "Port %d Received link speed %d update from adapter\n",
316 port
->actor_port_number
, speed
);
321 * __get_duplex - get a port's duplex
322 * @port: the port we're looking at
324 * Return @port's duplex in 802.3ad bitmask format. i.e.:
325 * 0x01 if in full duplex
328 static u8
__get_duplex(struct port
*port
)
330 struct slave
*slave
= port
->slave
;
333 /* handling a special case: when the configuration starts with
334 * link down, it sets the duplex to 0.
336 if (slave
->link
== BOND_LINK_UP
) {
337 switch (slave
->duplex
) {
340 netdev_dbg(slave
->bond
->dev
, "Port %d Received status full duplex update from adapter\n",
341 port
->actor_port_number
);
346 netdev_dbg(slave
->bond
->dev
, "Port %d Received status NOT full duplex update from adapter\n",
347 port
->actor_port_number
);
357 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
358 * @timer_type: which timer to operate
359 * @par: timer parameter. see below
361 * If @timer_type is %current_while_timer, @par indicates long/short timer.
362 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
363 * %SLOW_PERIODIC_TIME.
365 static u16
__ad_timer_to_ticks(u16 timer_type
, u16 par
)
367 u16 retval
= 0; /* to silence the compiler */
369 switch (timer_type
) {
370 case AD_CURRENT_WHILE_TIMER
: /* for rx machine usage */
372 retval
= (AD_SHORT_TIMEOUT_TIME
*ad_ticks_per_sec
);
374 retval
= (AD_LONG_TIMEOUT_TIME
*ad_ticks_per_sec
);
376 case AD_ACTOR_CHURN_TIMER
: /* for local churn machine */
377 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
379 case AD_PERIODIC_TIMER
: /* for periodic machine */
380 retval
= (par
*ad_ticks_per_sec
); /* long timeout */
382 case AD_PARTNER_CHURN_TIMER
: /* for remote churn machine */
383 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
385 case AD_WAIT_WHILE_TIMER
: /* for selection machine */
386 retval
= (AD_AGGREGATE_WAIT_TIME
*ad_ticks_per_sec
);
394 /* ================= ad_rx_machine helper functions ================== */
397 * __choose_matched - update a port's matched variable from a received lacpdu
398 * @lacpdu: the lacpdu we've received
399 * @port: the port we're looking at
401 * Update the value of the matched variable, using parameter values from a
402 * newly received lacpdu. Parameter values for the partner carried in the
403 * received PDU are compared with the corresponding operational parameter
404 * values for the actor. Matched is set to TRUE if all of these parameters
405 * match and the PDU parameter partner_state.aggregation has the same value as
406 * actor_oper_port_state.aggregation and lacp will actively maintain the link
407 * in the aggregation. Matched is also set to TRUE if the value of
408 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
409 * an individual link and lacp will actively maintain the link. Otherwise,
410 * matched is set to FALSE. LACP is considered to be actively maintaining the
411 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
412 * the actor's actor_oper_port_state.lacp_activity and the PDU's
413 * partner_state.lacp_activity variables are TRUE.
415 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
416 * used here to implement the language from 802.3ad 43.4.9 that requires
417 * recordPDU to "match" the LACPDU parameters to the stored values.
419 static void __choose_matched(struct lacpdu
*lacpdu
, struct port
*port
)
421 /* check if all parameters are alike
422 * or this is individual link(aggregation == FALSE)
423 * then update the state machine Matched variable.
425 if (((ntohs(lacpdu
->partner_port
) == port
->actor_port_number
) &&
426 (ntohs(lacpdu
->partner_port_priority
) == port
->actor_port_priority
) &&
427 MAC_ADDRESS_EQUAL(&(lacpdu
->partner_system
), &(port
->actor_system
)) &&
428 (ntohs(lacpdu
->partner_system_priority
) == port
->actor_system_priority
) &&
429 (ntohs(lacpdu
->partner_key
) == port
->actor_oper_port_key
) &&
430 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) == (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))) ||
431 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) == 0)
433 port
->sm_vars
|= AD_PORT_MATCHED
;
435 port
->sm_vars
&= ~AD_PORT_MATCHED
;
440 * __record_pdu - record parameters from a received lacpdu
441 * @lacpdu: the lacpdu we've received
442 * @port: the port we're looking at
444 * Record the parameter values for the Actor carried in a received lacpdu as
445 * the current partner operational parameter values and sets
446 * actor_oper_port_state.defaulted to FALSE.
448 static void __record_pdu(struct lacpdu
*lacpdu
, struct port
*port
)
450 if (lacpdu
&& port
) {
451 struct port_params
*partner
= &port
->partner_oper
;
453 __choose_matched(lacpdu
, port
);
454 /* record the new parameter values for the partner
457 partner
->port_number
= ntohs(lacpdu
->actor_port
);
458 partner
->port_priority
= ntohs(lacpdu
->actor_port_priority
);
459 partner
->system
= lacpdu
->actor_system
;
460 partner
->system_priority
= ntohs(lacpdu
->actor_system_priority
);
461 partner
->key
= ntohs(lacpdu
->actor_key
);
462 partner
->port_state
= lacpdu
->actor_state
;
464 /* set actor_oper_port_state.defaulted to FALSE */
465 port
->actor_oper_port_state
&= ~AD_STATE_DEFAULTED
;
467 /* set the partner sync. to on if the partner is sync,
468 * and the port is matched
470 if ((port
->sm_vars
& AD_PORT_MATCHED
) &&
471 (lacpdu
->actor_state
& AD_STATE_SYNCHRONIZATION
)) {
472 partner
->port_state
|= AD_STATE_SYNCHRONIZATION
;
473 pr_debug("%s partner sync=1\n", port
->slave
->dev
->name
);
475 partner
->port_state
&= ~AD_STATE_SYNCHRONIZATION
;
476 pr_debug("%s partner sync=0\n", port
->slave
->dev
->name
);
482 * __record_default - record default parameters
483 * @port: the port we're looking at
485 * This function records the default parameter values for the partner carried
486 * in the Partner Admin parameters as the current partner operational parameter
487 * values and sets actor_oper_port_state.defaulted to TRUE.
489 static void __record_default(struct port
*port
)
492 /* record the partner admin parameters */
493 memcpy(&port
->partner_oper
, &port
->partner_admin
,
494 sizeof(struct port_params
));
496 /* set actor_oper_port_state.defaulted to true */
497 port
->actor_oper_port_state
|= AD_STATE_DEFAULTED
;
502 * __update_selected - update a port's Selected variable from a received lacpdu
503 * @lacpdu: the lacpdu we've received
504 * @port: the port we're looking at
506 * Update the value of the selected variable, using parameter values from a
507 * newly received lacpdu. The parameter values for the Actor carried in the
508 * received PDU are compared with the corresponding operational parameter
509 * values for the ports partner. If one or more of the comparisons shows that
510 * the value(s) received in the PDU differ from the current operational values,
511 * then selected is set to FALSE and actor_oper_port_state.synchronization is
512 * set to out_of_sync. Otherwise, selected remains unchanged.
514 static void __update_selected(struct lacpdu
*lacpdu
, struct port
*port
)
516 if (lacpdu
&& port
) {
517 const struct port_params
*partner
= &port
->partner_oper
;
519 /* check if any parameter is different then
520 * update the state machine selected variable.
522 if (ntohs(lacpdu
->actor_port
) != partner
->port_number
||
523 ntohs(lacpdu
->actor_port_priority
) != partner
->port_priority
||
524 !MAC_ADDRESS_EQUAL(&lacpdu
->actor_system
, &partner
->system
) ||
525 ntohs(lacpdu
->actor_system_priority
) != partner
->system_priority
||
526 ntohs(lacpdu
->actor_key
) != partner
->key
||
527 (lacpdu
->actor_state
& AD_STATE_AGGREGATION
) != (partner
->port_state
& AD_STATE_AGGREGATION
)) {
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 then
552 * update the state machine selected variable.
554 if (admin
->port_number
!= oper
->port_number
||
555 admin
->port_priority
!= oper
->port_priority
||
556 !MAC_ADDRESS_EQUAL(&admin
->system
, &oper
->system
) ||
557 admin
->system_priority
!= oper
->system_priority
||
558 admin
->key
!= oper
->key
||
559 (admin
->port_state
& AD_STATE_AGGREGATION
)
560 != (oper
->port_state
& AD_STATE_AGGREGATION
)) {
561 port
->sm_vars
&= ~AD_PORT_SELECTED
;
567 * __update_ntt - update a port's ntt variable from a received lacpdu
568 * @lacpdu: the lacpdu we've received
569 * @port: the port we're looking at
571 * Updates the value of the ntt variable, using parameter values from a newly
572 * received lacpdu. The parameter values for the partner carried in the
573 * received PDU are compared with the corresponding operational parameter
574 * values for the Actor. If one or more of the comparisons shows that the
575 * value(s) received in the PDU differ from the current operational values,
576 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
578 static void __update_ntt(struct lacpdu
*lacpdu
, struct port
*port
)
580 /* validate lacpdu and port */
581 if (lacpdu
&& port
) {
582 /* check if any parameter is different then
583 * update the port->ntt.
585 if ((ntohs(lacpdu
->partner_port
) != port
->actor_port_number
) ||
586 (ntohs(lacpdu
->partner_port_priority
) != port
->actor_port_priority
) ||
587 !MAC_ADDRESS_EQUAL(&(lacpdu
->partner_system
), &(port
->actor_system
)) ||
588 (ntohs(lacpdu
->partner_system_priority
) != port
->actor_system_priority
) ||
589 (ntohs(lacpdu
->partner_key
) != port
->actor_oper_port_key
) ||
590 ((lacpdu
->partner_state
& AD_STATE_LACP_ACTIVITY
) != (port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
)) ||
591 ((lacpdu
->partner_state
& AD_STATE_LACP_TIMEOUT
) != (port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) ||
592 ((lacpdu
->partner_state
& AD_STATE_SYNCHRONIZATION
) != (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) ||
593 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) != (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))
601 * __agg_ports_are_ready - check if all ports in an aggregator are ready
602 * @aggregator: the aggregator we're looking at
605 static int __agg_ports_are_ready(struct aggregator
*aggregator
)
611 /* scan all ports in this aggregator to verfy if they are
614 for (port
= aggregator
->lag_ports
;
616 port
= port
->next_port_in_aggregator
) {
617 if (!(port
->sm_vars
& AD_PORT_READY_N
)) {
628 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
629 * @aggregator: the aggregator we're looking at
630 * @val: Should the ports' ready bit be set on or off
633 static void __set_agg_ports_ready(struct aggregator
*aggregator
, int val
)
637 for (port
= aggregator
->lag_ports
; port
;
638 port
= port
->next_port_in_aggregator
) {
640 port
->sm_vars
|= AD_PORT_READY
;
642 port
->sm_vars
&= ~AD_PORT_READY
;
647 * __get_agg_bandwidth - get the total bandwidth of an aggregator
648 * @aggregator: the aggregator we're looking at
651 static u32
__get_agg_bandwidth(struct aggregator
*aggregator
)
655 if (aggregator
->num_of_ports
) {
656 switch (__get_link_speed(aggregator
->lag_ports
)) {
657 case AD_LINK_SPEED_1MBPS
:
658 bandwidth
= aggregator
->num_of_ports
;
660 case AD_LINK_SPEED_10MBPS
:
661 bandwidth
= aggregator
->num_of_ports
* 10;
663 case AD_LINK_SPEED_100MBPS
:
664 bandwidth
= aggregator
->num_of_ports
* 100;
666 case AD_LINK_SPEED_1000MBPS
:
667 bandwidth
= aggregator
->num_of_ports
* 1000;
669 case AD_LINK_SPEED_2500MBPS
:
670 bandwidth
= aggregator
->num_of_ports
* 2500;
672 case AD_LINK_SPEED_10000MBPS
:
673 bandwidth
= aggregator
->num_of_ports
* 10000;
675 case AD_LINK_SPEED_20000MBPS
:
676 bandwidth
= aggregator
->num_of_ports
* 20000;
678 case AD_LINK_SPEED_40000MBPS
:
679 bandwidth
= aggregator
->num_of_ports
* 40000;
681 case AD_LINK_SPEED_56000MBPS
:
682 bandwidth
= aggregator
->num_of_ports
* 56000;
685 bandwidth
= 0; /* to silence the compiler */
692 * __get_active_agg - get the current active aggregator
693 * @aggregator: the aggregator we're looking at
695 * Caller must hold RCU lock.
697 static struct aggregator
*__get_active_agg(struct aggregator
*aggregator
)
699 struct bonding
*bond
= aggregator
->slave
->bond
;
700 struct list_head
*iter
;
703 bond_for_each_slave_rcu(bond
, slave
, iter
)
704 if (SLAVE_AD_INFO(slave
)->aggregator
.is_active
)
705 return &(SLAVE_AD_INFO(slave
)->aggregator
);
711 * __update_lacpdu_from_port - update a port's lacpdu fields
712 * @port: the port we're looking at
714 static inline void __update_lacpdu_from_port(struct port
*port
)
716 struct lacpdu
*lacpdu
= &port
->lacpdu
;
717 const struct port_params
*partner
= &port
->partner_oper
;
719 /* update current actual Actor parameters
720 * lacpdu->subtype initialized
721 * lacpdu->version_number initialized
722 * lacpdu->tlv_type_actor_info initialized
723 * lacpdu->actor_information_length initialized
726 lacpdu
->actor_system_priority
= htons(port
->actor_system_priority
);
727 lacpdu
->actor_system
= port
->actor_system
;
728 lacpdu
->actor_key
= htons(port
->actor_oper_port_key
);
729 lacpdu
->actor_port_priority
= htons(port
->actor_port_priority
);
730 lacpdu
->actor_port
= htons(port
->actor_port_number
);
731 lacpdu
->actor_state
= port
->actor_oper_port_state
;
732 pr_debug("update lacpdu: %s, actor port state %x\n",
733 port
->slave
->dev
->name
, port
->actor_oper_port_state
);
735 /* lacpdu->reserved_3_1 initialized
736 * lacpdu->tlv_type_partner_info initialized
737 * lacpdu->partner_information_length initialized
740 lacpdu
->partner_system_priority
= htons(partner
->system_priority
);
741 lacpdu
->partner_system
= partner
->system
;
742 lacpdu
->partner_key
= htons(partner
->key
);
743 lacpdu
->partner_port_priority
= htons(partner
->port_priority
);
744 lacpdu
->partner_port
= htons(partner
->port_number
);
745 lacpdu
->partner_state
= partner
->port_state
;
747 /* lacpdu->reserved_3_2 initialized
748 * lacpdu->tlv_type_collector_info initialized
749 * lacpdu->collector_information_length initialized
750 * collector_max_delay initialized
751 * reserved_12[12] initialized
752 * tlv_type_terminator initialized
753 * terminator_length initialized
754 * reserved_50[50] initialized
758 /* ================= main 802.3ad protocol code ========================= */
761 * ad_lacpdu_send - send out a lacpdu packet on a given port
762 * @port: the port we're looking at
764 * Returns: 0 on success
767 static int ad_lacpdu_send(struct port
*port
)
769 struct slave
*slave
= port
->slave
;
771 struct lacpdu_header
*lacpdu_header
;
772 int length
= sizeof(struct lacpdu_header
);
774 skb
= dev_alloc_skb(length
);
778 skb
->dev
= slave
->dev
;
779 skb_reset_mac_header(skb
);
780 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
781 skb
->protocol
= PKT_TYPE_LACPDU
;
782 skb
->priority
= TC_PRIO_CONTROL
;
784 lacpdu_header
= (struct lacpdu_header
*)skb_put(skb
, length
);
786 ether_addr_copy(lacpdu_header
->hdr
.h_dest
, lacpdu_mcast_addr
);
787 /* Note: source address is set to be the member's PERMANENT address,
788 * because we use it to identify loopback lacpdus in receive.
790 ether_addr_copy(lacpdu_header
->hdr
.h_source
, slave
->perm_hwaddr
);
791 lacpdu_header
->hdr
.h_proto
= PKT_TYPE_LACPDU
;
793 lacpdu_header
->lacpdu
= port
->lacpdu
;
801 * ad_marker_send - send marker information/response on a given port
802 * @port: the port we're looking at
803 * @marker: marker data to send
805 * Returns: 0 on success
808 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
)
810 struct slave
*slave
= port
->slave
;
812 struct bond_marker_header
*marker_header
;
813 int length
= sizeof(struct bond_marker_header
);
815 skb
= dev_alloc_skb(length
+ 16);
819 skb_reserve(skb
, 16);
821 skb
->dev
= slave
->dev
;
822 skb_reset_mac_header(skb
);
823 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
824 skb
->protocol
= PKT_TYPE_LACPDU
;
826 marker_header
= (struct bond_marker_header
*)skb_put(skb
, length
);
828 ether_addr_copy(marker_header
->hdr
.h_dest
, lacpdu_mcast_addr
);
829 /* Note: source address is set to be the member's PERMANENT address,
830 * because we use it to identify loopback MARKERs in receive.
832 ether_addr_copy(marker_header
->hdr
.h_source
, slave
->perm_hwaddr
);
833 marker_header
->hdr
.h_proto
= PKT_TYPE_LACPDU
;
835 marker_header
->marker
= *marker
;
843 * ad_mux_machine - handle a port's mux state machine
844 * @port: the port we're looking at
845 * @update_slave_arr: Does slave array need update?
847 static void ad_mux_machine(struct port
*port
, bool *update_slave_arr
)
849 mux_states_t last_state
;
851 /* keep current State Machine state to compare later if it was
854 last_state
= port
->sm_mux_state
;
856 if (port
->sm_vars
& AD_PORT_BEGIN
) {
857 port
->sm_mux_state
= AD_MUX_DETACHED
;
859 switch (port
->sm_mux_state
) {
860 case AD_MUX_DETACHED
:
861 if ((port
->sm_vars
& AD_PORT_SELECTED
)
862 || (port
->sm_vars
& AD_PORT_STANDBY
))
863 /* if SELECTED or STANDBY */
864 port
->sm_mux_state
= AD_MUX_WAITING
;
867 /* if SELECTED == FALSE return to DETACH state */
868 if (!(port
->sm_vars
& AD_PORT_SELECTED
)) {
869 port
->sm_vars
&= ~AD_PORT_READY_N
;
870 /* in order to withhold the Selection Logic to
871 * check all ports READY_N value every callback
872 * cycle to update ready variable, we check
873 * READY_N and update READY here
875 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
876 port
->sm_mux_state
= AD_MUX_DETACHED
;
880 /* check if the wait_while_timer expired */
881 if (port
->sm_mux_timer_counter
882 && !(--port
->sm_mux_timer_counter
))
883 port
->sm_vars
|= AD_PORT_READY_N
;
885 /* in order to withhold the selection logic to check
886 * all ports READY_N value every callback cycle to
887 * update ready variable, we check READY_N and update
890 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
892 /* if the wait_while_timer expired, and the port is
893 * in READY state, move to ATTACHED state
895 if ((port
->sm_vars
& AD_PORT_READY
)
896 && !port
->sm_mux_timer_counter
)
897 port
->sm_mux_state
= AD_MUX_ATTACHED
;
899 case AD_MUX_ATTACHED
:
900 /* check also if agg_select_timer expired (so the
901 * edable port will take place only after this timer)
903 if ((port
->sm_vars
& AD_PORT_SELECTED
) &&
904 (port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) &&
905 !__check_agg_selection_timer(port
)) {
906 if (port
->aggregator
->is_active
)
908 AD_MUX_COLLECTING_DISTRIBUTING
;
909 } else if (!(port
->sm_vars
& AD_PORT_SELECTED
) ||
910 (port
->sm_vars
& AD_PORT_STANDBY
)) {
911 /* if UNSELECTED or STANDBY */
912 port
->sm_vars
&= ~AD_PORT_READY_N
;
913 /* in order to withhold the selection logic to
914 * check all ports READY_N value every callback
915 * cycle to update ready variable, we check
916 * READY_N and update READY here
918 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
919 port
->sm_mux_state
= AD_MUX_DETACHED
;
920 } else if (port
->aggregator
->is_active
) {
921 port
->actor_oper_port_state
|=
922 AD_STATE_SYNCHRONIZATION
;
925 case AD_MUX_COLLECTING_DISTRIBUTING
:
926 if (!(port
->sm_vars
& AD_PORT_SELECTED
) ||
927 (port
->sm_vars
& AD_PORT_STANDBY
) ||
928 !(port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) ||
929 !(port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) {
930 port
->sm_mux_state
= AD_MUX_ATTACHED
;
932 /* if port state hasn't changed make
933 * sure that a collecting distributing
934 * port in an active aggregator is enabled
936 if (port
->aggregator
&&
937 port
->aggregator
->is_active
&&
938 !__port_is_enabled(port
)) {
949 /* check if the state machine was changed */
950 if (port
->sm_mux_state
!= last_state
) {
951 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
952 port
->actor_port_number
,
953 port
->slave
->dev
->name
,
956 switch (port
->sm_mux_state
) {
957 case AD_MUX_DETACHED
:
958 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
959 ad_disable_collecting_distributing(port
,
961 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
962 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
966 port
->sm_mux_timer_counter
= __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER
, 0);
968 case AD_MUX_ATTACHED
:
969 if (port
->aggregator
->is_active
)
970 port
->actor_oper_port_state
|=
971 AD_STATE_SYNCHRONIZATION
;
973 port
->actor_oper_port_state
&=
974 ~AD_STATE_SYNCHRONIZATION
;
975 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
976 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
977 ad_disable_collecting_distributing(port
,
981 case AD_MUX_COLLECTING_DISTRIBUTING
:
982 port
->actor_oper_port_state
|= AD_STATE_COLLECTING
;
983 port
->actor_oper_port_state
|= AD_STATE_DISTRIBUTING
;
984 port
->actor_oper_port_state
|= AD_STATE_SYNCHRONIZATION
;
985 ad_enable_collecting_distributing(port
,
996 * ad_rx_machine - handle a port's rx State Machine
997 * @lacpdu: the lacpdu we've received
998 * @port: the port we're looking at
1000 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1001 * CURRENT. If timer expired set the state machine in the proper state.
1002 * In other cases, this function checks if we need to switch to other state.
1004 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
)
1006 rx_states_t last_state
;
1008 /* keep current State Machine state to compare later if it was
1011 last_state
= port
->sm_rx_state
;
1013 /* check if state machine should change state */
1015 /* first, check if port was reinitialized */
1016 if (port
->sm_vars
& AD_PORT_BEGIN
) {
1017 port
->sm_rx_state
= AD_RX_INITIALIZE
;
1018 port
->sm_vars
|= AD_PORT_CHURNED
;
1019 /* check if port is not enabled */
1020 } else if (!(port
->sm_vars
& AD_PORT_BEGIN
)
1021 && !port
->is_enabled
&& !(port
->sm_vars
& AD_PORT_MOVED
))
1022 port
->sm_rx_state
= AD_RX_PORT_DISABLED
;
1023 /* check if new lacpdu arrived */
1024 else if (lacpdu
&& ((port
->sm_rx_state
== AD_RX_EXPIRED
) ||
1025 (port
->sm_rx_state
== AD_RX_DEFAULTED
) ||
1026 (port
->sm_rx_state
== AD_RX_CURRENT
))) {
1027 if (port
->sm_rx_state
!= AD_RX_CURRENT
)
1028 port
->sm_vars
|= AD_PORT_CHURNED
;
1029 port
->sm_rx_timer_counter
= 0;
1030 port
->sm_rx_state
= AD_RX_CURRENT
;
1032 /* if timer is on, and if it is expired */
1033 if (port
->sm_rx_timer_counter
&&
1034 !(--port
->sm_rx_timer_counter
)) {
1035 switch (port
->sm_rx_state
) {
1037 port
->sm_rx_state
= AD_RX_DEFAULTED
;
1040 port
->sm_rx_state
= AD_RX_EXPIRED
;
1046 /* if no lacpdu arrived and no timer is on */
1047 switch (port
->sm_rx_state
) {
1048 case AD_RX_PORT_DISABLED
:
1049 if (port
->sm_vars
& AD_PORT_MOVED
)
1050 port
->sm_rx_state
= AD_RX_INITIALIZE
;
1051 else if (port
->is_enabled
1053 & AD_PORT_LACP_ENABLED
))
1054 port
->sm_rx_state
= AD_RX_EXPIRED
;
1055 else if (port
->is_enabled
1057 & AD_PORT_LACP_ENABLED
) == 0))
1058 port
->sm_rx_state
= AD_RX_LACP_DISABLED
;
1067 /* check if the State machine was changed or new lacpdu arrived */
1068 if ((port
->sm_rx_state
!= last_state
) || (lacpdu
)) {
1069 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1070 port
->actor_port_number
,
1071 port
->slave
->dev
->name
,
1074 switch (port
->sm_rx_state
) {
1075 case AD_RX_INITIALIZE
:
1076 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_MASKS
))
1077 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1079 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
1080 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1081 __record_default(port
);
1082 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1083 port
->sm_vars
&= ~AD_PORT_MOVED
;
1084 port
->sm_rx_state
= AD_RX_PORT_DISABLED
;
1087 case AD_RX_PORT_DISABLED
:
1088 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1090 case AD_RX_LACP_DISABLED
:
1091 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1092 __record_default(port
);
1093 port
->partner_oper
.port_state
&= ~AD_STATE_AGGREGATION
;
1094 port
->sm_vars
|= AD_PORT_MATCHED
;
1095 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1098 /* Reset of the Synchronization flag (Standard 43.4.12)
1099 * This reset cause to disable this port in the
1100 * COLLECTING_DISTRIBUTING state of the mux machine in
1101 * case of EXPIRED even if LINK_DOWN didn't arrive for
1104 port
->partner_oper
.port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1105 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1106 port
->partner_oper
.port_state
|= AD_STATE_LACP_TIMEOUT
;
1107 port
->partner_oper
.port_state
|= AD_STATE_LACP_ACTIVITY
;
1108 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(AD_SHORT_TIMEOUT
));
1109 port
->actor_oper_port_state
|= AD_STATE_EXPIRED
;
1110 port
->sm_vars
|= AD_PORT_CHURNED
;
1112 case AD_RX_DEFAULTED
:
1113 __update_default_selected(port
);
1114 __record_default(port
);
1115 port
->sm_vars
|= AD_PORT_MATCHED
;
1116 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1119 /* detect loopback situation */
1120 if (MAC_ADDRESS_EQUAL(&(lacpdu
->actor_system
),
1121 &(port
->actor_system
))) {
1122 netdev_err(port
->slave
->bond
->dev
, "An illegal loopback occurred on adapter (%s)\n"
1123 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1124 port
->slave
->dev
->name
);
1127 __update_selected(lacpdu
, port
);
1128 __update_ntt(lacpdu
, port
);
1129 __record_pdu(lacpdu
, port
);
1130 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
));
1131 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1140 * ad_churn_machine - handle port churn's state machine
1141 * @port: the port we're looking at
1144 static void ad_churn_machine(struct port
*port
)
1146 if (port
->sm_vars
& AD_PORT_CHURNED
) {
1147 port
->sm_vars
&= ~AD_PORT_CHURNED
;
1148 port
->sm_churn_actor_state
= AD_CHURN_MONITOR
;
1149 port
->sm_churn_partner_state
= AD_CHURN_MONITOR
;
1150 port
->sm_churn_actor_timer_counter
=
1151 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER
, 0);
1152 port
->sm_churn_partner_timer_counter
=
1153 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER
, 0);
1156 if (port
->sm_churn_actor_timer_counter
&&
1157 !(--port
->sm_churn_actor_timer_counter
) &&
1158 port
->sm_churn_actor_state
== AD_CHURN_MONITOR
) {
1159 if (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
) {
1160 port
->sm_churn_actor_state
= AD_NO_CHURN
;
1162 port
->churn_actor_count
++;
1163 port
->sm_churn_actor_state
= AD_CHURN
;
1166 if (port
->sm_churn_partner_timer_counter
&&
1167 !(--port
->sm_churn_partner_timer_counter
) &&
1168 port
->sm_churn_partner_state
== AD_CHURN_MONITOR
) {
1169 if (port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) {
1170 port
->sm_churn_partner_state
= AD_NO_CHURN
;
1172 port
->churn_partner_count
++;
1173 port
->sm_churn_partner_state
= AD_CHURN
;
1179 * ad_tx_machine - handle a port's tx state machine
1180 * @port: the port we're looking at
1182 static void ad_tx_machine(struct port
*port
)
1184 /* check if tx timer expired, to verify that we do not send more than
1185 * 3 packets per second
1187 if (port
->sm_tx_timer_counter
&& !(--port
->sm_tx_timer_counter
)) {
1188 /* check if there is something to send */
1189 if (port
->ntt
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1190 __update_lacpdu_from_port(port
);
1192 if (ad_lacpdu_send(port
) >= 0) {
1193 pr_debug("Sent LACPDU on port %d\n",
1194 port
->actor_port_number
);
1196 /* mark ntt as false, so it will not be sent
1197 * again until demanded
1202 /* restart tx timer(to verify that we will not exceed
1203 * AD_MAX_TX_IN_SECOND
1205 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1210 * ad_periodic_machine - handle a port's periodic state machine
1211 * @port: the port we're looking at
1213 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1215 static void ad_periodic_machine(struct port
*port
)
1217 periodic_states_t last_state
;
1219 /* keep current state machine state to compare later if it was changed */
1220 last_state
= port
->sm_periodic_state
;
1222 /* check if port was reinitialized */
1223 if (((port
->sm_vars
& AD_PORT_BEGIN
) || !(port
->sm_vars
& AD_PORT_LACP_ENABLED
) || !port
->is_enabled
) ||
1224 (!(port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
) && !(port
->partner_oper
.port_state
& AD_STATE_LACP_ACTIVITY
))
1226 port
->sm_periodic_state
= AD_NO_PERIODIC
;
1228 /* check if state machine should change state */
1229 else if (port
->sm_periodic_timer_counter
) {
1230 /* check if periodic state machine expired */
1231 if (!(--port
->sm_periodic_timer_counter
)) {
1232 /* if expired then do tx */
1233 port
->sm_periodic_state
= AD_PERIODIC_TX
;
1235 /* If not expired, check if there is some new timeout
1236 * parameter from the partner state
1238 switch (port
->sm_periodic_state
) {
1239 case AD_FAST_PERIODIC
:
1240 if (!(port
->partner_oper
.port_state
1241 & AD_STATE_LACP_TIMEOUT
))
1242 port
->sm_periodic_state
= AD_SLOW_PERIODIC
;
1244 case AD_SLOW_PERIODIC
:
1245 if ((port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1246 port
->sm_periodic_timer_counter
= 0;
1247 port
->sm_periodic_state
= AD_PERIODIC_TX
;
1255 switch (port
->sm_periodic_state
) {
1256 case AD_NO_PERIODIC
:
1257 port
->sm_periodic_state
= AD_FAST_PERIODIC
;
1259 case AD_PERIODIC_TX
:
1260 if (!(port
->partner_oper
.port_state
&
1261 AD_STATE_LACP_TIMEOUT
))
1262 port
->sm_periodic_state
= AD_SLOW_PERIODIC
;
1264 port
->sm_periodic_state
= AD_FAST_PERIODIC
;
1271 /* check if the state machine was changed */
1272 if (port
->sm_periodic_state
!= last_state
) {
1273 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1274 port
->actor_port_number
, last_state
,
1275 port
->sm_periodic_state
);
1276 switch (port
->sm_periodic_state
) {
1277 case AD_NO_PERIODIC
:
1278 port
->sm_periodic_timer_counter
= 0;
1280 case AD_FAST_PERIODIC
:
1281 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1282 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_FAST_PERIODIC_TIME
))-1;
1284 case AD_SLOW_PERIODIC
:
1285 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1286 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_SLOW_PERIODIC_TIME
))-1;
1288 case AD_PERIODIC_TX
:
1298 * ad_port_selection_logic - select aggregation groups
1299 * @port: the port we're looking at
1300 * @update_slave_arr: Does slave array need update?
1302 * Select aggregation groups, and assign each port for it's aggregetor. The
1303 * selection logic is called in the inititalization (after all the handshkes),
1304 * and after every lacpdu receive (if selected is off).
1306 static void ad_port_selection_logic(struct port
*port
, bool *update_slave_arr
)
1308 struct aggregator
*aggregator
, *free_aggregator
= NULL
, *temp_aggregator
;
1309 struct port
*last_port
= NULL
, *curr_port
;
1310 struct list_head
*iter
;
1311 struct bonding
*bond
;
1312 struct slave
*slave
;
1315 /* if the port is already Selected, do nothing */
1316 if (port
->sm_vars
& AD_PORT_SELECTED
)
1319 bond
= __get_bond_by_port(port
);
1321 /* if the port is connected to other aggregator, detach it */
1322 if (port
->aggregator
) {
1323 /* detach the port from its former aggregator */
1324 temp_aggregator
= port
->aggregator
;
1325 for (curr_port
= temp_aggregator
->lag_ports
; curr_port
;
1326 last_port
= curr_port
,
1327 curr_port
= curr_port
->next_port_in_aggregator
) {
1328 if (curr_port
== port
) {
1329 temp_aggregator
->num_of_ports
--;
1330 /* if it is the first port attached to the
1334 temp_aggregator
->lag_ports
=
1335 port
->next_port_in_aggregator
;
1337 /* not the first port attached to the
1340 last_port
->next_port_in_aggregator
=
1341 port
->next_port_in_aggregator
;
1344 /* clear the port's relations to this
1347 port
->aggregator
= NULL
;
1348 port
->next_port_in_aggregator
= NULL
;
1349 port
->actor_port_aggregator_identifier
= 0;
1351 netdev_dbg(bond
->dev
, "Port %d left LAG %d\n",
1352 port
->actor_port_number
,
1353 temp_aggregator
->aggregator_identifier
);
1354 /* if the aggregator is empty, clear its
1355 * parameters, and set it ready to be attached
1357 if (!temp_aggregator
->lag_ports
)
1358 ad_clear_agg(temp_aggregator
);
1363 /* meaning: the port was related to an aggregator
1364 * but was not on the aggregator port list
1366 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1367 port
->slave
->bond
->dev
->name
,
1368 port
->actor_port_number
,
1369 port
->slave
->dev
->name
,
1370 port
->aggregator
->aggregator_identifier
);
1373 /* search on all aggregators for a suitable aggregator for this port */
1374 bond_for_each_slave(bond
, slave
, iter
) {
1375 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1377 /* keep a free aggregator for later use(if needed) */
1378 if (!aggregator
->lag_ports
) {
1379 if (!free_aggregator
)
1380 free_aggregator
= aggregator
;
1383 /* check if current aggregator suits us */
1384 if (((aggregator
->actor_oper_aggregator_key
== port
->actor_oper_port_key
) && /* if all parameters match AND */
1385 MAC_ADDRESS_EQUAL(&(aggregator
->partner_system
), &(port
->partner_oper
.system
)) &&
1386 (aggregator
->partner_system_priority
== port
->partner_oper
.system_priority
) &&
1387 (aggregator
->partner_oper_aggregator_key
== port
->partner_oper
.key
)
1389 ((!MAC_ADDRESS_EQUAL(&(port
->partner_oper
.system
), &(null_mac_addr
)) && /* partner answers */
1390 !aggregator
->is_individual
) /* but is not individual OR */
1393 /* attach to the founded aggregator */
1394 port
->aggregator
= aggregator
;
1395 port
->actor_port_aggregator_identifier
=
1396 port
->aggregator
->aggregator_identifier
;
1397 port
->next_port_in_aggregator
= aggregator
->lag_ports
;
1398 port
->aggregator
->num_of_ports
++;
1399 aggregator
->lag_ports
= port
;
1400 netdev_dbg(bond
->dev
, "Port %d joined LAG %d(existing LAG)\n",
1401 port
->actor_port_number
,
1402 port
->aggregator
->aggregator_identifier
);
1404 /* mark this port as selected */
1405 port
->sm_vars
|= AD_PORT_SELECTED
;
1411 /* the port couldn't find an aggregator - attach it to a new
1415 if (free_aggregator
) {
1416 /* assign port a new aggregator */
1417 port
->aggregator
= free_aggregator
;
1418 port
->actor_port_aggregator_identifier
=
1419 port
->aggregator
->aggregator_identifier
;
1421 /* update the new aggregator's parameters
1422 * if port was responsed from the end-user
1424 if (port
->actor_oper_port_key
& AD_DUPLEX_KEY_MASKS
)
1425 /* if port is full duplex */
1426 port
->aggregator
->is_individual
= false;
1428 port
->aggregator
->is_individual
= true;
1430 port
->aggregator
->actor_admin_aggregator_key
=
1431 port
->actor_admin_port_key
;
1432 port
->aggregator
->actor_oper_aggregator_key
=
1433 port
->actor_oper_port_key
;
1434 port
->aggregator
->partner_system
=
1435 port
->partner_oper
.system
;
1436 port
->aggregator
->partner_system_priority
=
1437 port
->partner_oper
.system_priority
;
1438 port
->aggregator
->partner_oper_aggregator_key
= port
->partner_oper
.key
;
1439 port
->aggregator
->receive_state
= 1;
1440 port
->aggregator
->transmit_state
= 1;
1441 port
->aggregator
->lag_ports
= port
;
1442 port
->aggregator
->num_of_ports
++;
1444 /* mark this port as selected */
1445 port
->sm_vars
|= AD_PORT_SELECTED
;
1447 netdev_dbg(bond
->dev
, "Port %d joined LAG %d(new LAG)\n",
1448 port
->actor_port_number
,
1449 port
->aggregator
->aggregator_identifier
);
1451 netdev_err(bond
->dev
, "Port %d (on %s) did not find a suitable aggregator\n",
1452 port
->actor_port_number
, port
->slave
->dev
->name
);
1455 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1456 * in all aggregator's ports, else set ready=FALSE in all
1457 * aggregator's ports
1459 __set_agg_ports_ready(port
->aggregator
,
1460 __agg_ports_are_ready(port
->aggregator
));
1462 aggregator
= __get_first_agg(port
);
1463 ad_agg_selection_logic(aggregator
, update_slave_arr
);
1465 if (!port
->aggregator
->is_active
)
1466 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1469 /* Decide if "agg" is a better choice for the new active aggregator that
1470 * the current best, according to the ad_select policy.
1472 static struct aggregator
*ad_agg_selection_test(struct aggregator
*best
,
1473 struct aggregator
*curr
)
1475 /* 0. If no best, select current.
1477 * 1. If the current agg is not individual, and the best is
1478 * individual, select current.
1480 * 2. If current agg is individual and the best is not, keep best.
1482 * 3. Therefore, current and best are both individual or both not
1485 * 3a. If current agg partner replied, and best agg partner did not,
1488 * 3b. If current agg partner did not reply and best agg partner
1489 * did reply, keep best.
1491 * 4. Therefore, current and best both have partner replies or
1492 * both do not, so perform selection policy:
1494 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1495 * select by bandwidth.
1497 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1502 if (!curr
->is_individual
&& best
->is_individual
)
1505 if (curr
->is_individual
&& !best
->is_individual
)
1508 if (__agg_has_partner(curr
) && !__agg_has_partner(best
))
1511 if (!__agg_has_partner(curr
) && __agg_has_partner(best
))
1514 switch (__get_agg_selection_mode(curr
->lag_ports
)) {
1516 if (curr
->num_of_ports
> best
->num_of_ports
)
1519 if (curr
->num_of_ports
< best
->num_of_ports
)
1523 case BOND_AD_STABLE
:
1524 case BOND_AD_BANDWIDTH
:
1525 if (__get_agg_bandwidth(curr
) > __get_agg_bandwidth(best
))
1531 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1532 curr
->slave
->bond
->dev
->name
,
1533 __get_agg_selection_mode(curr
->lag_ports
));
1540 static int agg_device_up(const struct aggregator
*agg
)
1542 struct port
*port
= agg
->lag_ports
;
1547 return netif_running(port
->slave
->dev
) &&
1548 netif_carrier_ok(port
->slave
->dev
);
1552 * ad_agg_selection_logic - select an aggregation group for a team
1553 * @aggregator: the aggregator we're looking at
1554 * @update_slave_arr: Does slave array need update?
1556 * It is assumed that only one aggregator may be selected for a team.
1558 * The logic of this function is to select the aggregator according to
1559 * the ad_select policy:
1561 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1562 * it, and to reselect the active aggregator only if the previous
1563 * aggregator has no more ports related to it.
1565 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1566 * bandwidth, and reselect whenever a link state change takes place or the
1567 * set of slaves in the bond changes.
1569 * BOND_AD_COUNT: select the aggregator with largest number of ports
1570 * (slaves), and reselect whenever a link state change takes place or the
1571 * set of slaves in the bond changes.
1573 * FIXME: this function MUST be called with the first agg in the bond, or
1574 * __get_active_agg() won't work correctly. This function should be better
1575 * called with the bond itself, and retrieve the first agg from it.
1577 static void ad_agg_selection_logic(struct aggregator
*agg
,
1578 bool *update_slave_arr
)
1580 struct aggregator
*best
, *active
, *origin
;
1581 struct bonding
*bond
= agg
->slave
->bond
;
1582 struct list_head
*iter
;
1583 struct slave
*slave
;
1588 active
= __get_active_agg(agg
);
1589 best
= (active
&& agg_device_up(active
)) ? active
: NULL
;
1591 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1592 agg
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1596 if (agg
->num_of_ports
&& agg_device_up(agg
))
1597 best
= ad_agg_selection_test(best
, agg
);
1601 __get_agg_selection_mode(best
->lag_ports
) == BOND_AD_STABLE
) {
1602 /* For the STABLE policy, don't replace the old active
1603 * aggregator if it's still active (it has an answering
1604 * partner) or if both the best and active don't have an
1605 * answering partner.
1607 if (active
&& active
->lag_ports
&&
1608 active
->lag_ports
->is_enabled
&&
1609 (__agg_has_partner(active
) ||
1610 (!__agg_has_partner(active
) &&
1611 !__agg_has_partner(best
)))) {
1612 if (!(!active
->actor_oper_aggregator_key
&&
1613 best
->actor_oper_aggregator_key
)) {
1615 active
->is_active
= 1;
1620 if (best
&& (best
== active
)) {
1622 active
->is_active
= 1;
1625 /* if there is new best aggregator, activate it */
1627 netdev_dbg(bond
->dev
, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1628 best
->aggregator_identifier
, best
->num_of_ports
,
1629 best
->actor_oper_aggregator_key
,
1630 best
->partner_oper_aggregator_key
,
1631 best
->is_individual
, best
->is_active
);
1632 netdev_dbg(bond
->dev
, "best ports %p slave %p %s\n",
1633 best
->lag_ports
, best
->slave
,
1634 best
->slave
? best
->slave
->dev
->name
: "NULL");
1636 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1637 agg
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1639 netdev_dbg(bond
->dev
, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1640 agg
->aggregator_identifier
, agg
->num_of_ports
,
1641 agg
->actor_oper_aggregator_key
,
1642 agg
->partner_oper_aggregator_key
,
1643 agg
->is_individual
, agg
->is_active
);
1646 /* check if any partner replys */
1647 if (best
->is_individual
) {
1648 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1650 best
->slave
->bond
->dev
->name
: "NULL");
1653 best
->is_active
= 1;
1654 netdev_dbg(bond
->dev
, "LAG %d chosen as the active LAG\n",
1655 best
->aggregator_identifier
);
1656 netdev_dbg(bond
->dev
, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1657 best
->aggregator_identifier
, best
->num_of_ports
,
1658 best
->actor_oper_aggregator_key
,
1659 best
->partner_oper_aggregator_key
,
1660 best
->is_individual
, best
->is_active
);
1662 /* disable the ports that were related to the former
1666 for (port
= active
->lag_ports
; port
;
1667 port
= port
->next_port_in_aggregator
) {
1668 __disable_port(port
);
1671 /* Slave array needs update. */
1672 *update_slave_arr
= true;
1675 /* if the selected aggregator is of join individuals
1676 * (partner_system is NULL), enable their ports
1678 active
= __get_active_agg(origin
);
1681 if (!__agg_has_partner(active
)) {
1682 for (port
= active
->lag_ports
; port
;
1683 port
= port
->next_port_in_aggregator
) {
1684 __enable_port(port
);
1691 bond_3ad_set_carrier(bond
);
1695 * ad_clear_agg - clear a given aggregator's parameters
1696 * @aggregator: the aggregator we're looking at
1698 static void ad_clear_agg(struct aggregator
*aggregator
)
1701 aggregator
->is_individual
= false;
1702 aggregator
->actor_admin_aggregator_key
= 0;
1703 aggregator
->actor_oper_aggregator_key
= 0;
1704 aggregator
->partner_system
= null_mac_addr
;
1705 aggregator
->partner_system_priority
= 0;
1706 aggregator
->partner_oper_aggregator_key
= 0;
1707 aggregator
->receive_state
= 0;
1708 aggregator
->transmit_state
= 0;
1709 aggregator
->lag_ports
= NULL
;
1710 aggregator
->is_active
= 0;
1711 aggregator
->num_of_ports
= 0;
1712 pr_debug("LAG %d was cleared\n",
1713 aggregator
->aggregator_identifier
);
1718 * ad_initialize_agg - initialize a given aggregator's parameters
1719 * @aggregator: the aggregator we're looking at
1721 static void ad_initialize_agg(struct aggregator
*aggregator
)
1724 ad_clear_agg(aggregator
);
1726 aggregator
->aggregator_mac_address
= null_mac_addr
;
1727 aggregator
->aggregator_identifier
= 0;
1728 aggregator
->slave
= NULL
;
1733 * ad_initialize_port - initialize a given port's parameters
1734 * @aggregator: the aggregator we're looking at
1735 * @lacp_fast: boolean. whether fast periodic should be used
1737 static void ad_initialize_port(struct port
*port
, int lacp_fast
)
1739 static const struct port_params tmpl
= {
1740 .system_priority
= 0xffff,
1743 .port_priority
= 0xff,
1746 static const struct lacpdu lacpdu
= {
1748 .version_number
= 0x01,
1749 .tlv_type_actor_info
= 0x01,
1750 .actor_information_length
= 0x14,
1751 .tlv_type_partner_info
= 0x02,
1752 .partner_information_length
= 0x14,
1753 .tlv_type_collector_info
= 0x03,
1754 .collector_information_length
= 0x10,
1755 .collector_max_delay
= htons(AD_COLLECTOR_MAX_DELAY
),
1759 port
->actor_port_priority
= 0xff;
1760 port
->actor_port_aggregator_identifier
= 0;
1762 port
->actor_admin_port_state
= AD_STATE_AGGREGATION
|
1763 AD_STATE_LACP_ACTIVITY
;
1764 port
->actor_oper_port_state
= AD_STATE_AGGREGATION
|
1765 AD_STATE_LACP_ACTIVITY
;
1768 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
1770 memcpy(&port
->partner_admin
, &tmpl
, sizeof(tmpl
));
1771 memcpy(&port
->partner_oper
, &tmpl
, sizeof(tmpl
));
1773 port
->is_enabled
= true;
1774 /* private parameters */
1775 port
->sm_vars
= AD_PORT_BEGIN
| AD_PORT_LACP_ENABLED
;
1776 port
->sm_rx_state
= 0;
1777 port
->sm_rx_timer_counter
= 0;
1778 port
->sm_periodic_state
= 0;
1779 port
->sm_periodic_timer_counter
= 0;
1780 port
->sm_mux_state
= 0;
1781 port
->sm_mux_timer_counter
= 0;
1782 port
->sm_tx_state
= 0;
1783 port
->aggregator
= NULL
;
1784 port
->next_port_in_aggregator
= NULL
;
1785 port
->transaction_id
= 0;
1787 port
->sm_churn_actor_timer_counter
= 0;
1788 port
->sm_churn_actor_state
= 0;
1789 port
->churn_actor_count
= 0;
1790 port
->sm_churn_partner_timer_counter
= 0;
1791 port
->sm_churn_partner_state
= 0;
1792 port
->churn_partner_count
= 0;
1794 memcpy(&port
->lacpdu
, &lacpdu
, sizeof(lacpdu
));
1799 * ad_enable_collecting_distributing - enable a port's transmit/receive
1800 * @port: the port we're looking at
1801 * @update_slave_arr: Does slave array need update?
1803 * Enable @port if it's in an active aggregator
1805 static void ad_enable_collecting_distributing(struct port
*port
,
1806 bool *update_slave_arr
)
1808 if (port
->aggregator
->is_active
) {
1809 pr_debug("Enabling port %d(LAG %d)\n",
1810 port
->actor_port_number
,
1811 port
->aggregator
->aggregator_identifier
);
1812 __enable_port(port
);
1813 /* Slave array needs update */
1814 *update_slave_arr
= true;
1819 * ad_disable_collecting_distributing - disable a port's transmit/receive
1820 * @port: the port we're looking at
1821 * @update_slave_arr: Does slave array need update?
1823 static void ad_disable_collecting_distributing(struct port
*port
,
1824 bool *update_slave_arr
)
1826 if (port
->aggregator
&&
1827 !MAC_ADDRESS_EQUAL(&(port
->aggregator
->partner_system
),
1828 &(null_mac_addr
))) {
1829 pr_debug("Disabling port %d(LAG %d)\n",
1830 port
->actor_port_number
,
1831 port
->aggregator
->aggregator_identifier
);
1832 __disable_port(port
);
1833 /* Slave array needs an update */
1834 *update_slave_arr
= true;
1839 * ad_marker_info_received - handle receive of a Marker information frame
1840 * @marker_info: Marker info received
1841 * @port: the port we're looking at
1843 static void ad_marker_info_received(struct bond_marker
*marker_info
,
1846 struct bond_marker marker
;
1848 /* copy the received marker data to the response marker */
1849 memcpy(&marker
, marker_info
, sizeof(struct bond_marker
));
1850 /* change the marker subtype to marker response */
1851 marker
.tlv_type
= AD_MARKER_RESPONSE_SUBTYPE
;
1853 /* send the marker response */
1854 if (ad_marker_send(port
, &marker
) >= 0) {
1855 pr_debug("Sent Marker Response on port %d\n",
1856 port
->actor_port_number
);
1861 * ad_marker_response_received - handle receive of a marker response frame
1862 * @marker: marker PDU received
1863 * @port: the port we're looking at
1865 * This function does nothing since we decided not to implement send and handle
1866 * response for marker PDU's, in this stage, but only to respond to marker
1869 static void ad_marker_response_received(struct bond_marker
*marker
,
1872 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1875 /* ========= AD exported functions to the main bonding code ========= */
1877 /* Check aggregators status in team every T seconds */
1878 #define AD_AGGREGATOR_SELECTION_TIMER 8
1881 * bond_3ad_initiate_agg_selection - initate aggregator selection
1882 * @bond: bonding struct
1884 * Set the aggregation selection timer, to initiate an agg selection in
1885 * the very near future. Called during first initialization, and during
1886 * any down to up transitions of the bond.
1888 void bond_3ad_initiate_agg_selection(struct bonding
*bond
, int timeout
)
1890 BOND_AD_INFO(bond
).agg_select_timer
= timeout
;
1894 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1895 * @bond: bonding struct to work on
1896 * @tick_resolution: tick duration (millisecond resolution)
1898 * Can be called only after the mac address of the bond is set.
1900 void bond_3ad_initialize(struct bonding
*bond
, u16 tick_resolution
)
1902 /* check that the bond is not initialized yet */
1903 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond
).system
.sys_mac_addr
),
1904 bond
->dev
->dev_addr
)) {
1906 BOND_AD_INFO(bond
).aggregator_identifier
= 0;
1908 BOND_AD_INFO(bond
).system
.sys_priority
=
1909 bond
->params
.ad_actor_sys_prio
;
1910 if (is_zero_ether_addr(bond
->params
.ad_actor_system
))
1911 BOND_AD_INFO(bond
).system
.sys_mac_addr
=
1912 *((struct mac_addr
*)bond
->dev
->dev_addr
);
1914 BOND_AD_INFO(bond
).system
.sys_mac_addr
=
1915 *((struct mac_addr
*)bond
->params
.ad_actor_system
);
1917 /* initialize how many times this module is called in one
1918 * second (should be about every 100ms)
1920 ad_ticks_per_sec
= tick_resolution
;
1922 bond_3ad_initiate_agg_selection(bond
,
1923 AD_AGGREGATOR_SELECTION_TIMER
*
1929 * bond_3ad_bind_slave - initialize a slave's port
1930 * @slave: slave struct to work on
1932 * Returns: 0 on success
1935 void bond_3ad_bind_slave(struct slave
*slave
)
1937 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1939 struct aggregator
*aggregator
;
1941 /* check that the slave has not been initialized yet. */
1942 if (SLAVE_AD_INFO(slave
)->port
.slave
!= slave
) {
1944 /* port initialization */
1945 port
= &(SLAVE_AD_INFO(slave
)->port
);
1947 ad_initialize_port(port
, bond
->params
.lacp_fast
);
1949 port
->slave
= slave
;
1950 port
->actor_port_number
= SLAVE_AD_INFO(slave
)->id
;
1951 /* key is determined according to the link speed, duplex and
1954 port
->actor_admin_port_key
= bond
->params
.ad_user_port_key
<< 6;
1955 ad_update_actor_keys(port
, false);
1956 /* actor system is the bond's system */
1957 port
->actor_system
= BOND_AD_INFO(bond
).system
.sys_mac_addr
;
1958 port
->actor_system_priority
=
1959 BOND_AD_INFO(bond
).system
.sys_priority
;
1960 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1961 * lacpdu's are sent in one second)
1963 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1965 __disable_port(port
);
1967 /* aggregator initialization */
1968 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1970 ad_initialize_agg(aggregator
);
1972 aggregator
->aggregator_mac_address
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1973 aggregator
->aggregator_identifier
= ++BOND_AD_INFO(bond
).aggregator_identifier
;
1974 aggregator
->slave
= slave
;
1975 aggregator
->is_active
= 0;
1976 aggregator
->num_of_ports
= 0;
1981 * bond_3ad_unbind_slave - deinitialize a slave's port
1982 * @slave: slave struct to work on
1984 * Search for the aggregator that is related to this port, remove the
1985 * aggregator and assign another aggregator for other port related to it
1986 * (if any), and remove the port.
1988 void bond_3ad_unbind_slave(struct slave
*slave
)
1990 struct port
*port
, *prev_port
, *temp_port
;
1991 struct aggregator
*aggregator
, *new_aggregator
, *temp_aggregator
;
1992 int select_new_active_agg
= 0;
1993 struct bonding
*bond
= slave
->bond
;
1994 struct slave
*slave_iter
;
1995 struct list_head
*iter
;
1996 bool dummy_slave_update
; /* Ignore this value as caller updates array */
1998 /* Sync against bond_3ad_state_machine_handler() */
1999 spin_lock_bh(&bond
->mode_lock
);
2000 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
2001 port
= &(SLAVE_AD_INFO(slave
)->port
);
2003 /* if slave is null, the whole port is not initialized */
2005 netdev_warn(bond
->dev
, "Trying to unbind an uninitialized port on %s\n",
2010 netdev_dbg(bond
->dev
, "Unbinding Link Aggregation Group %d\n",
2011 aggregator
->aggregator_identifier
);
2013 /* Tell the partner that this port is not suitable for aggregation */
2014 port
->actor_oper_port_state
&= ~AD_STATE_AGGREGATION
;
2015 __update_lacpdu_from_port(port
);
2016 ad_lacpdu_send(port
);
2018 /* check if this aggregator is occupied */
2019 if (aggregator
->lag_ports
) {
2020 /* check if there are other ports related to this aggregator
2021 * except the port related to this slave(thats ensure us that
2022 * there is a reason to search for new aggregator, and that we
2025 if ((aggregator
->lag_ports
!= port
) ||
2026 (aggregator
->lag_ports
->next_port_in_aggregator
)) {
2027 /* find new aggregator for the related port(s) */
2028 bond_for_each_slave(bond
, slave_iter
, iter
) {
2029 new_aggregator
= &(SLAVE_AD_INFO(slave_iter
)->aggregator
);
2030 /* if the new aggregator is empty, or it is
2031 * connected to our port only
2033 if (!new_aggregator
->lag_ports
||
2034 ((new_aggregator
->lag_ports
== port
) &&
2035 !new_aggregator
->lag_ports
->next_port_in_aggregator
))
2039 new_aggregator
= NULL
;
2041 /* if new aggregator found, copy the aggregator's
2042 * parameters and connect the related lag_ports to the
2045 if ((new_aggregator
) && ((!new_aggregator
->lag_ports
) || ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
))) {
2046 netdev_dbg(bond
->dev
, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2047 aggregator
->aggregator_identifier
,
2048 new_aggregator
->aggregator_identifier
);
2050 if ((new_aggregator
->lag_ports
== port
) &&
2051 new_aggregator
->is_active
) {
2052 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2053 select_new_active_agg
= 1;
2056 new_aggregator
->is_individual
= aggregator
->is_individual
;
2057 new_aggregator
->actor_admin_aggregator_key
= aggregator
->actor_admin_aggregator_key
;
2058 new_aggregator
->actor_oper_aggregator_key
= aggregator
->actor_oper_aggregator_key
;
2059 new_aggregator
->partner_system
= aggregator
->partner_system
;
2060 new_aggregator
->partner_system_priority
= aggregator
->partner_system_priority
;
2061 new_aggregator
->partner_oper_aggregator_key
= aggregator
->partner_oper_aggregator_key
;
2062 new_aggregator
->receive_state
= aggregator
->receive_state
;
2063 new_aggregator
->transmit_state
= aggregator
->transmit_state
;
2064 new_aggregator
->lag_ports
= aggregator
->lag_ports
;
2065 new_aggregator
->is_active
= aggregator
->is_active
;
2066 new_aggregator
->num_of_ports
= aggregator
->num_of_ports
;
2068 /* update the information that is written on
2069 * the ports about the aggregator
2071 for (temp_port
= aggregator
->lag_ports
; temp_port
;
2072 temp_port
= temp_port
->next_port_in_aggregator
) {
2073 temp_port
->aggregator
= new_aggregator
;
2074 temp_port
->actor_port_aggregator_identifier
= new_aggregator
->aggregator_identifier
;
2077 ad_clear_agg(aggregator
);
2079 if (select_new_active_agg
)
2080 ad_agg_selection_logic(__get_first_agg(port
),
2081 &dummy_slave_update
);
2083 netdev_warn(bond
->dev
, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2086 /* in case that the only port related to this
2087 * aggregator is the one we want to remove
2089 select_new_active_agg
= aggregator
->is_active
;
2090 ad_clear_agg(aggregator
);
2091 if (select_new_active_agg
) {
2092 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2093 /* select new active aggregator */
2094 temp_aggregator
= __get_first_agg(port
);
2095 if (temp_aggregator
)
2096 ad_agg_selection_logic(temp_aggregator
,
2097 &dummy_slave_update
);
2102 netdev_dbg(bond
->dev
, "Unbinding port %d\n", port
->actor_port_number
);
2104 /* find the aggregator that this port is connected to */
2105 bond_for_each_slave(bond
, slave_iter
, iter
) {
2106 temp_aggregator
= &(SLAVE_AD_INFO(slave_iter
)->aggregator
);
2108 /* search the port in the aggregator's related ports */
2109 for (temp_port
= temp_aggregator
->lag_ports
; temp_port
;
2110 prev_port
= temp_port
,
2111 temp_port
= temp_port
->next_port_in_aggregator
) {
2112 if (temp_port
== port
) {
2113 /* the aggregator found - detach the port from
2117 prev_port
->next_port_in_aggregator
= temp_port
->next_port_in_aggregator
;
2119 temp_aggregator
->lag_ports
= temp_port
->next_port_in_aggregator
;
2120 temp_aggregator
->num_of_ports
--;
2121 if (temp_aggregator
->num_of_ports
== 0) {
2122 select_new_active_agg
= temp_aggregator
->is_active
;
2123 ad_clear_agg(temp_aggregator
);
2124 if (select_new_active_agg
) {
2125 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2126 /* select new active aggregator */
2127 ad_agg_selection_logic(__get_first_agg(port
),
2128 &dummy_slave_update
);
2138 spin_unlock_bh(&bond
->mode_lock
);
2142 * bond_3ad_state_machine_handler - handle state machines timeout
2143 * @bond: bonding struct to work on
2145 * The state machine handling concept in this module is to check every tick
2146 * which state machine should operate any function. The execution order is
2147 * round robin, so when we have an interaction between state machines, the
2148 * reply of one to each other might be delayed until next tick.
2150 * This function also complete the initialization when the agg_select_timer
2151 * times out, and it selects an aggregator for the ports that are yet not
2152 * related to any aggregator, and selects the active aggregator for a bond.
2154 void bond_3ad_state_machine_handler(struct work_struct
*work
)
2156 struct bonding
*bond
= container_of(work
, struct bonding
,
2158 struct aggregator
*aggregator
;
2159 struct list_head
*iter
;
2160 struct slave
*slave
;
2162 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
2163 bool update_slave_arr
= false;
2165 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2166 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2167 * concurrently due to incoming LACPDU as well.
2169 spin_lock_bh(&bond
->mode_lock
);
2172 /* check if there are any slaves */
2173 if (!bond_has_slaves(bond
))
2176 /* check if agg_select_timer timer after initialize is timed out */
2177 if (BOND_AD_INFO(bond
).agg_select_timer
&&
2178 !(--BOND_AD_INFO(bond
).agg_select_timer
)) {
2179 slave
= bond_first_slave_rcu(bond
);
2180 port
= slave
? &(SLAVE_AD_INFO(slave
)->port
) : NULL
;
2182 /* select the active aggregator for the bond */
2185 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2190 aggregator
= __get_first_agg(port
);
2191 ad_agg_selection_logic(aggregator
, &update_slave_arr
);
2193 bond_3ad_set_carrier(bond
);
2196 /* for each port run the state machines */
2197 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2198 port
= &(SLAVE_AD_INFO(slave
)->port
);
2200 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2205 ad_rx_machine(NULL
, port
);
2206 ad_periodic_machine(port
);
2207 ad_port_selection_logic(port
, &update_slave_arr
);
2208 ad_mux_machine(port
, &update_slave_arr
);
2209 ad_tx_machine(port
);
2210 ad_churn_machine(port
);
2212 /* turn off the BEGIN bit, since we already handled it */
2213 if (port
->sm_vars
& AD_PORT_BEGIN
)
2214 port
->sm_vars
&= ~AD_PORT_BEGIN
;
2218 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2219 if (slave
->should_notify
) {
2220 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
2225 spin_unlock_bh(&bond
->mode_lock
);
2227 if (update_slave_arr
)
2228 bond_slave_arr_work_rearm(bond
, 0);
2230 if (should_notify_rtnl
&& rtnl_trylock()) {
2231 bond_slave_state_notify(bond
);
2234 queue_delayed_work(bond
->wq
, &bond
->ad_work
, ad_delta_in_ticks
);
2238 * bond_3ad_rx_indication - handle a received frame
2239 * @lacpdu: received lacpdu
2240 * @slave: slave struct to work on
2241 * @length: length of the data received
2243 * It is assumed that frames that were sent on this NIC don't returned as new
2244 * received frames (loopback). Since only the payload is given to this
2245 * function, it check for loopback.
2247 static int bond_3ad_rx_indication(struct lacpdu
*lacpdu
, struct slave
*slave
,
2251 int ret
= RX_HANDLER_ANOTHER
;
2253 if (length
>= sizeof(struct lacpdu
)) {
2255 port
= &(SLAVE_AD_INFO(slave
)->port
);
2258 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2259 slave
->dev
->name
, slave
->bond
->dev
->name
);
2263 switch (lacpdu
->subtype
) {
2264 case AD_TYPE_LACPDU
:
2265 ret
= RX_HANDLER_CONSUMED
;
2266 netdev_dbg(slave
->bond
->dev
,
2267 "Received LACPDU on port %d slave %s\n",
2268 port
->actor_port_number
,
2270 /* Protect against concurrent state machines */
2271 spin_lock(&slave
->bond
->mode_lock
);
2272 ad_rx_machine(lacpdu
, port
);
2273 spin_unlock(&slave
->bond
->mode_lock
);
2276 case AD_TYPE_MARKER
:
2277 ret
= RX_HANDLER_CONSUMED
;
2278 /* No need to convert fields to Little Endian since we
2279 * don't use the marker's fields.
2282 switch (((struct bond_marker
*)lacpdu
)->tlv_type
) {
2283 case AD_MARKER_INFORMATION_SUBTYPE
:
2284 netdev_dbg(slave
->bond
->dev
, "Received Marker Information on port %d\n",
2285 port
->actor_port_number
);
2286 ad_marker_info_received((struct bond_marker
*)lacpdu
, port
);
2289 case AD_MARKER_RESPONSE_SUBTYPE
:
2290 netdev_dbg(slave
->bond
->dev
, "Received Marker Response on port %d\n",
2291 port
->actor_port_number
);
2292 ad_marker_response_received((struct bond_marker
*)lacpdu
, port
);
2296 netdev_dbg(slave
->bond
->dev
, "Received an unknown Marker subtype on slot %d\n",
2297 port
->actor_port_number
);
2305 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2306 * its current speed and duplex settings.
2308 * @port: the port we'are looking at
2309 * @reset: Boolean to just reset the speed and the duplex part of the key
2311 * The logic to change the oper / admin keys is:
2312 * (a) A full duplex port can participate in LACP with partner.
2313 * (b) When the speed is changed, LACP need to be reinitiated.
2315 static void ad_update_actor_keys(struct port
*port
, bool reset
)
2318 u16 ospeed
= 0, speed
= 0;
2319 u16 old_oper_key
= port
->actor_oper_port_key
;
2321 port
->actor_admin_port_key
&= ~(AD_SPEED_KEY_MASKS
|AD_DUPLEX_KEY_MASKS
);
2323 speed
= __get_link_speed(port
);
2324 ospeed
= (old_oper_key
& AD_SPEED_KEY_MASKS
) >> 1;
2325 duplex
= __get_duplex(port
);
2326 port
->actor_admin_port_key
|= (speed
<< 1) | duplex
;
2328 port
->actor_oper_port_key
= port
->actor_admin_port_key
;
2330 if (old_oper_key
!= port
->actor_oper_port_key
) {
2331 /* Only 'duplex' port participates in LACP */
2333 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
2335 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
2339 netdev_err(port
->slave
->dev
,
2340 "speed changed to 0 for port %s",
2341 port
->slave
->dev
->name
);
2342 } else if (duplex
&& ospeed
!= speed
) {
2343 /* Speed change restarts LACP state-machine */
2344 port
->sm_vars
|= AD_PORT_BEGIN
;
2351 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2354 * @slave: slave struct to work on
2356 * Handle reselection of aggregator (if needed) for this port.
2358 void bond_3ad_adapter_speed_duplex_changed(struct slave
*slave
)
2362 port
= &(SLAVE_AD_INFO(slave
)->port
);
2364 /* if slave is null, the whole port is not initialized */
2366 netdev_warn(slave
->bond
->dev
,
2367 "speed/duplex changed for uninitialized port %s\n",
2372 spin_lock_bh(&slave
->bond
->mode_lock
);
2373 ad_update_actor_keys(port
, false);
2374 netdev_dbg(slave
->bond
->dev
, "Port %d slave %s changed speed/duplex\n",
2375 port
->actor_port_number
, slave
->dev
->name
);
2376 spin_unlock_bh(&slave
->bond
->mode_lock
);
2380 * bond_3ad_handle_link_change - handle a slave's link status change indication
2381 * @slave: slave struct to work on
2382 * @status: whether the link is now up or down
2384 * Handle reselection of aggregator (if needed) for this port.
2386 void bond_3ad_handle_link_change(struct slave
*slave
, char link
)
2390 port
= &(SLAVE_AD_INFO(slave
)->port
);
2392 /* if slave is null, the whole port is not initialized */
2394 netdev_warn(slave
->bond
->dev
, "link status changed for uninitialized port on %s\n",
2399 spin_lock_bh(&slave
->bond
->mode_lock
);
2400 /* on link down we are zeroing duplex and speed since
2401 * some of the adaptors(ce1000.lan) report full duplex/speed
2402 * instead of N/A(duplex) / 0(speed).
2404 * on link up we are forcing recheck on the duplex and speed since
2405 * some of he adaptors(ce1000.lan) report.
2407 if (link
== BOND_LINK_UP
) {
2408 port
->is_enabled
= true;
2409 ad_update_actor_keys(port
, false);
2411 /* link has failed */
2412 port
->is_enabled
= false;
2413 ad_update_actor_keys(port
, true);
2415 netdev_dbg(slave
->bond
->dev
, "Port %d changed link status to %s\n",
2416 port
->actor_port_number
,
2417 link
== BOND_LINK_UP
? "UP" : "DOWN");
2419 spin_unlock_bh(&slave
->bond
->mode_lock
);
2421 /* RTNL is held and mode_lock is released so it's safe
2422 * to update slave_array here.
2424 bond_update_slave_arr(slave
->bond
, NULL
);
2428 * bond_3ad_set_carrier - set link state for bonding master
2429 * @bond - bonding structure
2431 * if we have an active aggregator, we're up, if not, we're down.
2432 * Presumes that we cannot have an active aggregator if there are
2433 * no slaves with link up.
2435 * This behavior complies with IEEE 802.3 section 43.3.9.
2437 * Called by bond_set_carrier(). Return zero if carrier state does not
2438 * change, nonzero if it does.
2440 int bond_3ad_set_carrier(struct bonding
*bond
)
2442 struct aggregator
*active
;
2443 struct slave
*first_slave
;
2447 first_slave
= bond_first_slave_rcu(bond
);
2452 active
= __get_active_agg(&(SLAVE_AD_INFO(first_slave
)->aggregator
));
2454 /* are enough slaves available to consider link up? */
2455 if (active
->num_of_ports
< bond
->params
.min_links
) {
2456 if (netif_carrier_ok(bond
->dev
)) {
2457 netif_carrier_off(bond
->dev
);
2460 } else if (!netif_carrier_ok(bond
->dev
)) {
2461 netif_carrier_on(bond
->dev
);
2464 } else if (netif_carrier_ok(bond
->dev
)) {
2465 netif_carrier_off(bond
->dev
);
2473 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2474 * @bond: bonding struct to work on
2475 * @ad_info: ad_info struct to fill with the bond's info
2477 * Returns: 0 on success
2480 int __bond_3ad_get_active_agg_info(struct bonding
*bond
,
2481 struct ad_info
*ad_info
)
2483 struct aggregator
*aggregator
= NULL
;
2484 struct list_head
*iter
;
2485 struct slave
*slave
;
2488 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2489 port
= &(SLAVE_AD_INFO(slave
)->port
);
2490 if (port
->aggregator
&& port
->aggregator
->is_active
) {
2491 aggregator
= port
->aggregator
;
2499 ad_info
->aggregator_id
= aggregator
->aggregator_identifier
;
2500 ad_info
->ports
= aggregator
->num_of_ports
;
2501 ad_info
->actor_key
= aggregator
->actor_oper_aggregator_key
;
2502 ad_info
->partner_key
= aggregator
->partner_oper_aggregator_key
;
2503 ether_addr_copy(ad_info
->partner_system
,
2504 aggregator
->partner_system
.mac_addr_value
);
2508 int bond_3ad_get_active_agg_info(struct bonding
*bond
, struct ad_info
*ad_info
)
2513 ret
= __bond_3ad_get_active_agg_info(bond
, ad_info
);
2519 int bond_3ad_lacpdu_recv(const struct sk_buff
*skb
, struct bonding
*bond
,
2520 struct slave
*slave
)
2522 struct lacpdu
*lacpdu
, _lacpdu
;
2524 if (skb
->protocol
!= PKT_TYPE_LACPDU
)
2525 return RX_HANDLER_ANOTHER
;
2527 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb
)->h_dest
, lacpdu_mcast_addr
))
2528 return RX_HANDLER_ANOTHER
;
2530 lacpdu
= skb_header_pointer(skb
, 0, sizeof(_lacpdu
), &_lacpdu
);
2532 return RX_HANDLER_ANOTHER
;
2534 return bond_3ad_rx_indication(lacpdu
, slave
, skb
->len
);
2538 * bond_3ad_update_lacp_rate - change the lacp rate
2539 * @bond - bonding struct
2541 * When modify lacp_rate parameter via sysfs,
2542 * update actor_oper_port_state of each port.
2544 * Hold bond->mode_lock,
2545 * so we can modify port->actor_oper_port_state,
2546 * no matter bond is up or down.
2548 void bond_3ad_update_lacp_rate(struct bonding
*bond
)
2550 struct port
*port
= NULL
;
2551 struct list_head
*iter
;
2552 struct slave
*slave
;
2555 lacp_fast
= bond
->params
.lacp_fast
;
2556 spin_lock_bh(&bond
->mode_lock
);
2557 bond_for_each_slave(bond
, slave
, iter
) {
2558 port
= &(SLAVE_AD_INFO(slave
)->port
);
2560 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
2562 port
->actor_oper_port_state
&= ~AD_STATE_LACP_TIMEOUT
;
2564 spin_unlock_bh(&bond
->mode_lock
);