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
74 /* Port Key definitions
75 * key is determined according to the link speed, duplex and
76 * user key (which is yet not supported)
77 * --------------------------------------------------------------
78 * Port key : | User key | Speed | Duplex |
79 * --------------------------------------------------------------
82 #define AD_DUPLEX_KEY_MASKS 0x1
83 #define AD_SPEED_KEY_MASKS 0x3E
84 #define AD_USER_KEY_MASKS 0xFFC0
86 enum ad_link_speed_type
{
87 AD_LINK_SPEED_1MBPS
= 1,
89 AD_LINK_SPEED_100MBPS
,
90 AD_LINK_SPEED_1000MBPS
,
91 AD_LINK_SPEED_2500MBPS
,
92 AD_LINK_SPEED_10000MBPS
,
93 AD_LINK_SPEED_20000MBPS
,
94 AD_LINK_SPEED_40000MBPS
,
95 AD_LINK_SPEED_56000MBPS
98 /* compare MAC addresses */
99 #define MAC_ADDRESS_EQUAL(A, B) \
100 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
102 static struct mac_addr null_mac_addr
= { { 0, 0, 0, 0, 0, 0 } };
103 static u16 ad_ticks_per_sec
;
104 static const int ad_delta_in_ticks
= (AD_TIMER_INTERVAL
* HZ
) / 1000;
106 static const u8 lacpdu_mcast_addr
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
108 /* ================= main 802.3ad protocol functions ================== */
109 static int ad_lacpdu_send(struct port
*port
);
110 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
);
111 static void ad_mux_machine(struct port
*port
, bool *update_slave_arr
);
112 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
);
113 static void ad_tx_machine(struct port
*port
);
114 static void ad_periodic_machine(struct port
*port
);
115 static void ad_port_selection_logic(struct port
*port
, bool *update_slave_arr
);
116 static void ad_agg_selection_logic(struct aggregator
*aggregator
,
117 bool *update_slave_arr
);
118 static void ad_clear_agg(struct aggregator
*aggregator
);
119 static void ad_initialize_agg(struct aggregator
*aggregator
);
120 static void ad_initialize_port(struct port
*port
, int lacp_fast
);
121 static void ad_enable_collecting_distributing(struct port
*port
,
122 bool *update_slave_arr
);
123 static void ad_disable_collecting_distributing(struct port
*port
,
124 bool *update_slave_arr
);
125 static void ad_marker_info_received(struct bond_marker
*marker_info
,
127 static void ad_marker_response_received(struct bond_marker
*marker
,
131 /* ================= api to bonding and kernel code ================== */
134 * __get_bond_by_port - get the port's bonding struct
135 * @port: the port we're looking at
137 * Return @port's bonding struct, or %NULL if it can't be found.
139 static inline struct bonding
*__get_bond_by_port(struct port
*port
)
141 if (port
->slave
== NULL
)
144 return bond_get_bond_by_slave(port
->slave
);
148 * __get_first_agg - get the first aggregator in the bond
149 * @bond: the bond we're looking at
151 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
153 * The caller must hold RCU or RTNL lock.
155 static inline struct aggregator
*__get_first_agg(struct port
*port
)
157 struct bonding
*bond
= __get_bond_by_port(port
);
158 struct slave
*first_slave
;
159 struct aggregator
*agg
;
161 /* If there's no bond for this port, or bond has no slaves */
166 first_slave
= bond_first_slave_rcu(bond
);
167 agg
= first_slave
? &(SLAVE_AD_INFO(first_slave
)->aggregator
) : NULL
;
174 * __agg_has_partner - see if we have a partner
175 * @agg: the agregator we're looking at
177 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
178 * address for the partner). Return 0 if not.
180 static inline int __agg_has_partner(struct aggregator
*agg
)
182 return !is_zero_ether_addr(agg
->partner_system
.mac_addr_value
);
186 * __disable_port - disable the port's slave
187 * @port: the port we're looking at
189 static inline void __disable_port(struct port
*port
)
191 bond_set_slave_inactive_flags(port
->slave
, BOND_SLAVE_NOTIFY_LATER
);
195 * __enable_port - enable the port's slave, if it's up
196 * @port: the port we're looking at
198 static inline void __enable_port(struct port
*port
)
200 struct slave
*slave
= port
->slave
;
202 if ((slave
->link
== BOND_LINK_UP
) && bond_slave_is_up(slave
))
203 bond_set_slave_active_flags(slave
, BOND_SLAVE_NOTIFY_LATER
);
207 * __port_is_enabled - check if the port's slave is in active state
208 * @port: the port we're looking at
210 static inline int __port_is_enabled(struct port
*port
)
212 return bond_is_active_slave(port
->slave
);
216 * __get_agg_selection_mode - get the aggregator selection mode
217 * @port: the port we're looking at
219 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
221 static inline u32
__get_agg_selection_mode(struct port
*port
)
223 struct bonding
*bond
= __get_bond_by_port(port
);
226 return BOND_AD_STABLE
;
228 return bond
->params
.ad_select
;
232 * __check_agg_selection_timer - check if the selection timer has expired
233 * @port: the port we're looking at
235 static inline int __check_agg_selection_timer(struct port
*port
)
237 struct bonding
*bond
= __get_bond_by_port(port
);
242 return BOND_AD_INFO(bond
).agg_select_timer
? 1 : 0;
246 * __get_link_speed - get a port's speed
247 * @port: the port we're looking at
249 * Return @port's speed in 802.3ad enum format. i.e. one of:
251 * %AD_LINK_SPEED_10MBPS,
252 * %AD_LINK_SPEED_100MBPS,
253 * %AD_LINK_SPEED_1000MBPS,
254 * %AD_LINK_SPEED_2500MBPS,
255 * %AD_LINK_SPEED_10000MBPS
256 * %AD_LINK_SPEED_20000MBPS
257 * %AD_LINK_SPEED_40000MBPS
258 * %AD_LINK_SPEED_56000MBPS
260 static u16
__get_link_speed(struct port
*port
)
262 struct slave
*slave
= port
->slave
;
265 /* this if covers only a special case: when the configuration starts
266 * with link down, it sets the speed to 0.
267 * This is done in spite of the fact that the e100 driver reports 0
268 * to be compatible with MVT in the future.
270 if (slave
->link
!= BOND_LINK_UP
)
273 switch (slave
->speed
) {
275 speed
= AD_LINK_SPEED_10MBPS
;
279 speed
= AD_LINK_SPEED_100MBPS
;
283 speed
= AD_LINK_SPEED_1000MBPS
;
287 speed
= AD_LINK_SPEED_2500MBPS
;
291 speed
= AD_LINK_SPEED_10000MBPS
;
295 speed
= AD_LINK_SPEED_20000MBPS
;
299 speed
= AD_LINK_SPEED_40000MBPS
;
303 speed
= AD_LINK_SPEED_56000MBPS
;
307 /* unknown speed value from ethtool. shouldn't happen */
313 netdev_dbg(slave
->bond
->dev
, "Port %d Received link speed %d update from adapter\n",
314 port
->actor_port_number
, speed
);
319 * __get_duplex - get a port's duplex
320 * @port: the port we're looking at
322 * Return @port's duplex in 802.3ad bitmask format. i.e.:
323 * 0x01 if in full duplex
326 static u8
__get_duplex(struct port
*port
)
328 struct slave
*slave
= port
->slave
;
331 /* handling a special case: when the configuration starts with
332 * link down, it sets the duplex to 0.
334 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 /* check if port is not enabled */
1019 else if (!(port
->sm_vars
& AD_PORT_BEGIN
)
1020 && !port
->is_enabled
&& !(port
->sm_vars
& AD_PORT_MOVED
))
1021 port
->sm_rx_state
= AD_RX_PORT_DISABLED
;
1022 /* check if new lacpdu arrived */
1023 else if (lacpdu
&& ((port
->sm_rx_state
== AD_RX_EXPIRED
) ||
1024 (port
->sm_rx_state
== AD_RX_DEFAULTED
) ||
1025 (port
->sm_rx_state
== AD_RX_CURRENT
))) {
1026 port
->sm_rx_timer_counter
= 0;
1027 port
->sm_rx_state
= AD_RX_CURRENT
;
1029 /* if timer is on, and if it is expired */
1030 if (port
->sm_rx_timer_counter
&&
1031 !(--port
->sm_rx_timer_counter
)) {
1032 switch (port
->sm_rx_state
) {
1034 port
->sm_rx_state
= AD_RX_DEFAULTED
;
1037 port
->sm_rx_state
= AD_RX_EXPIRED
;
1043 /* if no lacpdu arrived and no timer is on */
1044 switch (port
->sm_rx_state
) {
1045 case AD_RX_PORT_DISABLED
:
1046 if (port
->sm_vars
& AD_PORT_MOVED
)
1047 port
->sm_rx_state
= AD_RX_INITIALIZE
;
1048 else if (port
->is_enabled
1050 & AD_PORT_LACP_ENABLED
))
1051 port
->sm_rx_state
= AD_RX_EXPIRED
;
1052 else if (port
->is_enabled
1054 & AD_PORT_LACP_ENABLED
) == 0))
1055 port
->sm_rx_state
= AD_RX_LACP_DISABLED
;
1064 /* check if the State machine was changed or new lacpdu arrived */
1065 if ((port
->sm_rx_state
!= last_state
) || (lacpdu
)) {
1066 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1067 port
->actor_port_number
,
1068 port
->slave
->dev
->name
,
1071 switch (port
->sm_rx_state
) {
1072 case AD_RX_INITIALIZE
:
1073 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_MASKS
))
1074 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1076 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
1077 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1078 __record_default(port
);
1079 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1080 port
->sm_vars
&= ~AD_PORT_MOVED
;
1081 port
->sm_rx_state
= AD_RX_PORT_DISABLED
;
1084 case AD_RX_PORT_DISABLED
:
1085 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1087 case AD_RX_LACP_DISABLED
:
1088 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1089 __record_default(port
);
1090 port
->partner_oper
.port_state
&= ~AD_STATE_AGGREGATION
;
1091 port
->sm_vars
|= AD_PORT_MATCHED
;
1092 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1095 /* Reset of the Synchronization flag (Standard 43.4.12)
1096 * This reset cause to disable this port in the
1097 * COLLECTING_DISTRIBUTING state of the mux machine in
1098 * case of EXPIRED even if LINK_DOWN didn't arrive for
1101 port
->partner_oper
.port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1102 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1103 port
->partner_oper
.port_state
|= AD_STATE_LACP_ACTIVITY
;
1104 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(AD_SHORT_TIMEOUT
));
1105 port
->actor_oper_port_state
|= AD_STATE_EXPIRED
;
1107 case AD_RX_DEFAULTED
:
1108 __update_default_selected(port
);
1109 __record_default(port
);
1110 port
->sm_vars
|= AD_PORT_MATCHED
;
1111 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1114 /* detect loopback situation */
1115 if (MAC_ADDRESS_EQUAL(&(lacpdu
->actor_system
),
1116 &(port
->actor_system
))) {
1117 netdev_err(port
->slave
->bond
->dev
, "An illegal loopback occurred on adapter (%s)\n"
1118 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1119 port
->slave
->dev
->name
);
1122 __update_selected(lacpdu
, port
);
1123 __update_ntt(lacpdu
, port
);
1124 __record_pdu(lacpdu
, port
);
1125 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
));
1126 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1135 * ad_tx_machine - handle a port's tx state machine
1136 * @port: the port we're looking at
1138 static void ad_tx_machine(struct port
*port
)
1140 /* check if tx timer expired, to verify that we do not send more than
1141 * 3 packets per second
1143 if (port
->sm_tx_timer_counter
&& !(--port
->sm_tx_timer_counter
)) {
1144 /* check if there is something to send */
1145 if (port
->ntt
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1146 __update_lacpdu_from_port(port
);
1148 if (ad_lacpdu_send(port
) >= 0) {
1149 pr_debug("Sent LACPDU on port %d\n",
1150 port
->actor_port_number
);
1152 /* mark ntt as false, so it will not be sent
1153 * again until demanded
1158 /* restart tx timer(to verify that we will not exceed
1159 * AD_MAX_TX_IN_SECOND
1161 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1166 * ad_periodic_machine - handle a port's periodic state machine
1167 * @port: the port we're looking at
1169 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1171 static void ad_periodic_machine(struct port
*port
)
1173 periodic_states_t last_state
;
1175 /* keep current state machine state to compare later if it was changed */
1176 last_state
= port
->sm_periodic_state
;
1178 /* check if port was reinitialized */
1179 if (((port
->sm_vars
& AD_PORT_BEGIN
) || !(port
->sm_vars
& AD_PORT_LACP_ENABLED
) || !port
->is_enabled
) ||
1180 (!(port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
) && !(port
->partner_oper
.port_state
& AD_STATE_LACP_ACTIVITY
))
1182 port
->sm_periodic_state
= AD_NO_PERIODIC
;
1184 /* check if state machine should change state */
1185 else if (port
->sm_periodic_timer_counter
) {
1186 /* check if periodic state machine expired */
1187 if (!(--port
->sm_periodic_timer_counter
)) {
1188 /* if expired then do tx */
1189 port
->sm_periodic_state
= AD_PERIODIC_TX
;
1191 /* If not expired, check if there is some new timeout
1192 * parameter from the partner state
1194 switch (port
->sm_periodic_state
) {
1195 case AD_FAST_PERIODIC
:
1196 if (!(port
->partner_oper
.port_state
1197 & AD_STATE_LACP_TIMEOUT
))
1198 port
->sm_periodic_state
= AD_SLOW_PERIODIC
;
1200 case AD_SLOW_PERIODIC
:
1201 if ((port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1202 port
->sm_periodic_timer_counter
= 0;
1203 port
->sm_periodic_state
= AD_PERIODIC_TX
;
1211 switch (port
->sm_periodic_state
) {
1212 case AD_NO_PERIODIC
:
1213 port
->sm_periodic_state
= AD_FAST_PERIODIC
;
1215 case AD_PERIODIC_TX
:
1216 if (!(port
->partner_oper
.port_state
&
1217 AD_STATE_LACP_TIMEOUT
))
1218 port
->sm_periodic_state
= AD_SLOW_PERIODIC
;
1220 port
->sm_periodic_state
= AD_FAST_PERIODIC
;
1227 /* check if the state machine was changed */
1228 if (port
->sm_periodic_state
!= last_state
) {
1229 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1230 port
->actor_port_number
, last_state
,
1231 port
->sm_periodic_state
);
1232 switch (port
->sm_periodic_state
) {
1233 case AD_NO_PERIODIC
:
1234 port
->sm_periodic_timer_counter
= 0;
1236 case AD_FAST_PERIODIC
:
1237 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1238 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_FAST_PERIODIC_TIME
))-1;
1240 case AD_SLOW_PERIODIC
:
1241 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1242 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_SLOW_PERIODIC_TIME
))-1;
1244 case AD_PERIODIC_TX
:
1254 * ad_port_selection_logic - select aggregation groups
1255 * @port: the port we're looking at
1256 * @update_slave_arr: Does slave array need update?
1258 * Select aggregation groups, and assign each port for it's aggregetor. The
1259 * selection logic is called in the inititalization (after all the handshkes),
1260 * and after every lacpdu receive (if selected is off).
1262 static void ad_port_selection_logic(struct port
*port
, bool *update_slave_arr
)
1264 struct aggregator
*aggregator
, *free_aggregator
= NULL
, *temp_aggregator
;
1265 struct port
*last_port
= NULL
, *curr_port
;
1266 struct list_head
*iter
;
1267 struct bonding
*bond
;
1268 struct slave
*slave
;
1271 /* if the port is already Selected, do nothing */
1272 if (port
->sm_vars
& AD_PORT_SELECTED
)
1275 bond
= __get_bond_by_port(port
);
1277 /* if the port is connected to other aggregator, detach it */
1278 if (port
->aggregator
) {
1279 /* detach the port from its former aggregator */
1280 temp_aggregator
= port
->aggregator
;
1281 for (curr_port
= temp_aggregator
->lag_ports
; curr_port
;
1282 last_port
= curr_port
,
1283 curr_port
= curr_port
->next_port_in_aggregator
) {
1284 if (curr_port
== port
) {
1285 temp_aggregator
->num_of_ports
--;
1286 /* if it is the first port attached to the
1290 temp_aggregator
->lag_ports
=
1291 port
->next_port_in_aggregator
;
1293 /* not the first port attached to the
1296 last_port
->next_port_in_aggregator
=
1297 port
->next_port_in_aggregator
;
1300 /* clear the port's relations to this
1303 port
->aggregator
= NULL
;
1304 port
->next_port_in_aggregator
= NULL
;
1305 port
->actor_port_aggregator_identifier
= 0;
1307 netdev_dbg(bond
->dev
, "Port %d left LAG %d\n",
1308 port
->actor_port_number
,
1309 temp_aggregator
->aggregator_identifier
);
1310 /* if the aggregator is empty, clear its
1311 * parameters, and set it ready to be attached
1313 if (!temp_aggregator
->lag_ports
)
1314 ad_clear_agg(temp_aggregator
);
1319 /* meaning: the port was related to an aggregator
1320 * but was not on the aggregator port list
1322 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1323 port
->slave
->bond
->dev
->name
,
1324 port
->actor_port_number
,
1325 port
->slave
->dev
->name
,
1326 port
->aggregator
->aggregator_identifier
);
1329 /* search on all aggregators for a suitable aggregator for this port */
1330 bond_for_each_slave(bond
, slave
, iter
) {
1331 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1333 /* keep a free aggregator for later use(if needed) */
1334 if (!aggregator
->lag_ports
) {
1335 if (!free_aggregator
)
1336 free_aggregator
= aggregator
;
1339 /* check if current aggregator suits us */
1340 if (((aggregator
->actor_oper_aggregator_key
== port
->actor_oper_port_key
) && /* if all parameters match AND */
1341 MAC_ADDRESS_EQUAL(&(aggregator
->partner_system
), &(port
->partner_oper
.system
)) &&
1342 (aggregator
->partner_system_priority
== port
->partner_oper
.system_priority
) &&
1343 (aggregator
->partner_oper_aggregator_key
== port
->partner_oper
.key
)
1345 ((!MAC_ADDRESS_EQUAL(&(port
->partner_oper
.system
), &(null_mac_addr
)) && /* partner answers */
1346 !aggregator
->is_individual
) /* but is not individual OR */
1349 /* attach to the founded aggregator */
1350 port
->aggregator
= aggregator
;
1351 port
->actor_port_aggregator_identifier
=
1352 port
->aggregator
->aggregator_identifier
;
1353 port
->next_port_in_aggregator
= aggregator
->lag_ports
;
1354 port
->aggregator
->num_of_ports
++;
1355 aggregator
->lag_ports
= port
;
1356 netdev_dbg(bond
->dev
, "Port %d joined LAG %d(existing LAG)\n",
1357 port
->actor_port_number
,
1358 port
->aggregator
->aggregator_identifier
);
1360 /* mark this port as selected */
1361 port
->sm_vars
|= AD_PORT_SELECTED
;
1367 /* the port couldn't find an aggregator - attach it to a new
1371 if (free_aggregator
) {
1372 /* assign port a new aggregator */
1373 port
->aggregator
= free_aggregator
;
1374 port
->actor_port_aggregator_identifier
=
1375 port
->aggregator
->aggregator_identifier
;
1377 /* update the new aggregator's parameters
1378 * if port was responsed from the end-user
1380 if (port
->actor_oper_port_key
& AD_DUPLEX_KEY_MASKS
)
1381 /* if port is full duplex */
1382 port
->aggregator
->is_individual
= false;
1384 port
->aggregator
->is_individual
= true;
1386 port
->aggregator
->actor_admin_aggregator_key
= port
->actor_admin_port_key
;
1387 port
->aggregator
->actor_oper_aggregator_key
= port
->actor_oper_port_key
;
1388 port
->aggregator
->partner_system
=
1389 port
->partner_oper
.system
;
1390 port
->aggregator
->partner_system_priority
=
1391 port
->partner_oper
.system_priority
;
1392 port
->aggregator
->partner_oper_aggregator_key
= port
->partner_oper
.key
;
1393 port
->aggregator
->receive_state
= 1;
1394 port
->aggregator
->transmit_state
= 1;
1395 port
->aggregator
->lag_ports
= port
;
1396 port
->aggregator
->num_of_ports
++;
1398 /* mark this port as selected */
1399 port
->sm_vars
|= AD_PORT_SELECTED
;
1401 netdev_dbg(bond
->dev
, "Port %d joined LAG %d(new LAG)\n",
1402 port
->actor_port_number
,
1403 port
->aggregator
->aggregator_identifier
);
1405 netdev_err(bond
->dev
, "Port %d (on %s) did not find a suitable aggregator\n",
1406 port
->actor_port_number
, port
->slave
->dev
->name
);
1409 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1410 * in all aggregator's ports, else set ready=FALSE in all
1411 * aggregator's ports
1413 __set_agg_ports_ready(port
->aggregator
,
1414 __agg_ports_are_ready(port
->aggregator
));
1416 aggregator
= __get_first_agg(port
);
1417 ad_agg_selection_logic(aggregator
, update_slave_arr
);
1419 if (!port
->aggregator
->is_active
)
1420 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1423 /* Decide if "agg" is a better choice for the new active aggregator that
1424 * the current best, according to the ad_select policy.
1426 static struct aggregator
*ad_agg_selection_test(struct aggregator
*best
,
1427 struct aggregator
*curr
)
1429 /* 0. If no best, select current.
1431 * 1. If the current agg is not individual, and the best is
1432 * individual, select current.
1434 * 2. If current agg is individual and the best is not, keep best.
1436 * 3. Therefore, current and best are both individual or both not
1439 * 3a. If current agg partner replied, and best agg partner did not,
1442 * 3b. If current agg partner did not reply and best agg partner
1443 * did reply, keep best.
1445 * 4. Therefore, current and best both have partner replies or
1446 * both do not, so perform selection policy:
1448 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1449 * select by bandwidth.
1451 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1456 if (!curr
->is_individual
&& best
->is_individual
)
1459 if (curr
->is_individual
&& !best
->is_individual
)
1462 if (__agg_has_partner(curr
) && !__agg_has_partner(best
))
1465 if (!__agg_has_partner(curr
) && __agg_has_partner(best
))
1468 switch (__get_agg_selection_mode(curr
->lag_ports
)) {
1470 if (curr
->num_of_ports
> best
->num_of_ports
)
1473 if (curr
->num_of_ports
< best
->num_of_ports
)
1477 case BOND_AD_STABLE
:
1478 case BOND_AD_BANDWIDTH
:
1479 if (__get_agg_bandwidth(curr
) > __get_agg_bandwidth(best
))
1485 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1486 curr
->slave
->bond
->dev
->name
,
1487 __get_agg_selection_mode(curr
->lag_ports
));
1494 static int agg_device_up(const struct aggregator
*agg
)
1496 struct port
*port
= agg
->lag_ports
;
1501 return netif_running(port
->slave
->dev
) &&
1502 netif_carrier_ok(port
->slave
->dev
);
1506 * ad_agg_selection_logic - select an aggregation group for a team
1507 * @aggregator: the aggregator we're looking at
1508 * @update_slave_arr: Does slave array need update?
1510 * It is assumed that only one aggregator may be selected for a team.
1512 * The logic of this function is to select the aggregator according to
1513 * the ad_select policy:
1515 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1516 * it, and to reselect the active aggregator only if the previous
1517 * aggregator has no more ports related to it.
1519 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1520 * bandwidth, and reselect whenever a link state change takes place or the
1521 * set of slaves in the bond changes.
1523 * BOND_AD_COUNT: select the aggregator with largest number of ports
1524 * (slaves), and reselect whenever a link state change takes place or the
1525 * set of slaves in the bond changes.
1527 * FIXME: this function MUST be called with the first agg in the bond, or
1528 * __get_active_agg() won't work correctly. This function should be better
1529 * called with the bond itself, and retrieve the first agg from it.
1531 static void ad_agg_selection_logic(struct aggregator
*agg
,
1532 bool *update_slave_arr
)
1534 struct aggregator
*best
, *active
, *origin
;
1535 struct bonding
*bond
= agg
->slave
->bond
;
1536 struct list_head
*iter
;
1537 struct slave
*slave
;
1542 active
= __get_active_agg(agg
);
1543 best
= (active
&& agg_device_up(active
)) ? active
: NULL
;
1545 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1546 agg
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1550 if (agg
->num_of_ports
&& agg_device_up(agg
))
1551 best
= ad_agg_selection_test(best
, agg
);
1555 __get_agg_selection_mode(best
->lag_ports
) == BOND_AD_STABLE
) {
1556 /* For the STABLE policy, don't replace the old active
1557 * aggregator if it's still active (it has an answering
1558 * partner) or if both the best and active don't have an
1559 * answering partner.
1561 if (active
&& active
->lag_ports
&&
1562 active
->lag_ports
->is_enabled
&&
1563 (__agg_has_partner(active
) ||
1564 (!__agg_has_partner(active
) &&
1565 !__agg_has_partner(best
)))) {
1566 if (!(!active
->actor_oper_aggregator_key
&&
1567 best
->actor_oper_aggregator_key
)) {
1569 active
->is_active
= 1;
1574 if (best
&& (best
== active
)) {
1576 active
->is_active
= 1;
1579 /* if there is new best aggregator, activate it */
1581 netdev_dbg(bond
->dev
, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1582 best
->aggregator_identifier
, best
->num_of_ports
,
1583 best
->actor_oper_aggregator_key
,
1584 best
->partner_oper_aggregator_key
,
1585 best
->is_individual
, best
->is_active
);
1586 netdev_dbg(bond
->dev
, "best ports %p slave %p %s\n",
1587 best
->lag_ports
, best
->slave
,
1588 best
->slave
? best
->slave
->dev
->name
: "NULL");
1590 bond_for_each_slave_rcu(bond
, slave
, iter
) {
1591 agg
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1593 netdev_dbg(bond
->dev
, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1594 agg
->aggregator_identifier
, agg
->num_of_ports
,
1595 agg
->actor_oper_aggregator_key
,
1596 agg
->partner_oper_aggregator_key
,
1597 agg
->is_individual
, agg
->is_active
);
1600 /* check if any partner replys */
1601 if (best
->is_individual
) {
1602 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1604 best
->slave
->bond
->dev
->name
: "NULL");
1607 best
->is_active
= 1;
1608 netdev_dbg(bond
->dev
, "LAG %d chosen as the active LAG\n",
1609 best
->aggregator_identifier
);
1610 netdev_dbg(bond
->dev
, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1611 best
->aggregator_identifier
, best
->num_of_ports
,
1612 best
->actor_oper_aggregator_key
,
1613 best
->partner_oper_aggregator_key
,
1614 best
->is_individual
, best
->is_active
);
1616 /* disable the ports that were related to the former
1620 for (port
= active
->lag_ports
; port
;
1621 port
= port
->next_port_in_aggregator
) {
1622 __disable_port(port
);
1625 /* Slave array needs update. */
1626 *update_slave_arr
= true;
1629 /* if the selected aggregator is of join individuals
1630 * (partner_system is NULL), enable their ports
1632 active
= __get_active_agg(origin
);
1635 if (!__agg_has_partner(active
)) {
1636 for (port
= active
->lag_ports
; port
;
1637 port
= port
->next_port_in_aggregator
) {
1638 __enable_port(port
);
1645 bond_3ad_set_carrier(bond
);
1649 * ad_clear_agg - clear a given aggregator's parameters
1650 * @aggregator: the aggregator we're looking at
1652 static void ad_clear_agg(struct aggregator
*aggregator
)
1655 aggregator
->is_individual
= false;
1656 aggregator
->actor_admin_aggregator_key
= 0;
1657 aggregator
->actor_oper_aggregator_key
= 0;
1658 aggregator
->partner_system
= null_mac_addr
;
1659 aggregator
->partner_system_priority
= 0;
1660 aggregator
->partner_oper_aggregator_key
= 0;
1661 aggregator
->receive_state
= 0;
1662 aggregator
->transmit_state
= 0;
1663 aggregator
->lag_ports
= NULL
;
1664 aggregator
->is_active
= 0;
1665 aggregator
->num_of_ports
= 0;
1666 pr_debug("LAG %d was cleared\n",
1667 aggregator
->aggregator_identifier
);
1672 * ad_initialize_agg - initialize a given aggregator's parameters
1673 * @aggregator: the aggregator we're looking at
1675 static void ad_initialize_agg(struct aggregator
*aggregator
)
1678 ad_clear_agg(aggregator
);
1680 aggregator
->aggregator_mac_address
= null_mac_addr
;
1681 aggregator
->aggregator_identifier
= 0;
1682 aggregator
->slave
= NULL
;
1687 * ad_initialize_port - initialize a given port's parameters
1688 * @aggregator: the aggregator we're looking at
1689 * @lacp_fast: boolean. whether fast periodic should be used
1691 static void ad_initialize_port(struct port
*port
, int lacp_fast
)
1693 static const struct port_params tmpl
= {
1694 .system_priority
= 0xffff,
1697 .port_priority
= 0xff,
1700 static const struct lacpdu lacpdu
= {
1702 .version_number
= 0x01,
1703 .tlv_type_actor_info
= 0x01,
1704 .actor_information_length
= 0x14,
1705 .tlv_type_partner_info
= 0x02,
1706 .partner_information_length
= 0x14,
1707 .tlv_type_collector_info
= 0x03,
1708 .collector_information_length
= 0x10,
1709 .collector_max_delay
= htons(AD_COLLECTOR_MAX_DELAY
),
1713 port
->actor_port_number
= 1;
1714 port
->actor_port_priority
= 0xff;
1715 port
->actor_system
= null_mac_addr
;
1716 port
->actor_system_priority
= 0xffff;
1717 port
->actor_port_aggregator_identifier
= 0;
1719 port
->actor_admin_port_key
= 1;
1720 port
->actor_oper_port_key
= 1;
1721 port
->actor_admin_port_state
= AD_STATE_AGGREGATION
|
1722 AD_STATE_LACP_ACTIVITY
;
1723 port
->actor_oper_port_state
= AD_STATE_AGGREGATION
|
1724 AD_STATE_LACP_ACTIVITY
;
1727 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
1729 memcpy(&port
->partner_admin
, &tmpl
, sizeof(tmpl
));
1730 memcpy(&port
->partner_oper
, &tmpl
, sizeof(tmpl
));
1732 port
->is_enabled
= true;
1733 /* private parameters */
1734 port
->sm_vars
= 0x3;
1735 port
->sm_rx_state
= 0;
1736 port
->sm_rx_timer_counter
= 0;
1737 port
->sm_periodic_state
= 0;
1738 port
->sm_periodic_timer_counter
= 0;
1739 port
->sm_mux_state
= 0;
1740 port
->sm_mux_timer_counter
= 0;
1741 port
->sm_tx_state
= 0;
1742 port
->sm_tx_timer_counter
= 0;
1744 port
->aggregator
= NULL
;
1745 port
->next_port_in_aggregator
= NULL
;
1746 port
->transaction_id
= 0;
1748 memcpy(&port
->lacpdu
, &lacpdu
, sizeof(lacpdu
));
1753 * ad_enable_collecting_distributing - enable a port's transmit/receive
1754 * @port: the port we're looking at
1755 * @update_slave_arr: Does slave array need update?
1757 * Enable @port if it's in an active aggregator
1759 static void ad_enable_collecting_distributing(struct port
*port
,
1760 bool *update_slave_arr
)
1762 if (port
->aggregator
->is_active
) {
1763 pr_debug("Enabling port %d(LAG %d)\n",
1764 port
->actor_port_number
,
1765 port
->aggregator
->aggregator_identifier
);
1766 __enable_port(port
);
1767 /* Slave array needs update */
1768 *update_slave_arr
= true;
1773 * ad_disable_collecting_distributing - disable a port's transmit/receive
1774 * @port: the port we're looking at
1775 * @update_slave_arr: Does slave array need update?
1777 static void ad_disable_collecting_distributing(struct port
*port
,
1778 bool *update_slave_arr
)
1780 if (port
->aggregator
&&
1781 !MAC_ADDRESS_EQUAL(&(port
->aggregator
->partner_system
),
1782 &(null_mac_addr
))) {
1783 pr_debug("Disabling port %d(LAG %d)\n",
1784 port
->actor_port_number
,
1785 port
->aggregator
->aggregator_identifier
);
1786 __disable_port(port
);
1787 /* Slave array needs an update */
1788 *update_slave_arr
= true;
1793 * ad_marker_info_received - handle receive of a Marker information frame
1794 * @marker_info: Marker info received
1795 * @port: the port we're looking at
1797 static void ad_marker_info_received(struct bond_marker
*marker_info
,
1800 struct bond_marker marker
;
1802 /* copy the received marker data to the response marker */
1803 memcpy(&marker
, marker_info
, sizeof(struct bond_marker
));
1804 /* change the marker subtype to marker response */
1805 marker
.tlv_type
= AD_MARKER_RESPONSE_SUBTYPE
;
1807 /* send the marker response */
1808 if (ad_marker_send(port
, &marker
) >= 0) {
1809 pr_debug("Sent Marker Response on port %d\n",
1810 port
->actor_port_number
);
1815 * ad_marker_response_received - handle receive of a marker response frame
1816 * @marker: marker PDU received
1817 * @port: the port we're looking at
1819 * This function does nothing since we decided not to implement send and handle
1820 * response for marker PDU's, in this stage, but only to respond to marker
1823 static void ad_marker_response_received(struct bond_marker
*marker
,
1828 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1831 /* ========= AD exported functions to the main bonding code ========= */
1833 /* Check aggregators status in team every T seconds */
1834 #define AD_AGGREGATOR_SELECTION_TIMER 8
1837 * bond_3ad_initiate_agg_selection - initate aggregator selection
1838 * @bond: bonding struct
1840 * Set the aggregation selection timer, to initiate an agg selection in
1841 * the very near future. Called during first initialization, and during
1842 * any down to up transitions of the bond.
1844 void bond_3ad_initiate_agg_selection(struct bonding
*bond
, int timeout
)
1846 BOND_AD_INFO(bond
).agg_select_timer
= timeout
;
1850 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1851 * @bond: bonding struct to work on
1852 * @tick_resolution: tick duration (millisecond resolution)
1854 * Can be called only after the mac address of the bond is set.
1856 void bond_3ad_initialize(struct bonding
*bond
, u16 tick_resolution
)
1858 /* check that the bond is not initialized yet */
1859 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond
).system
.sys_mac_addr
),
1860 bond
->dev
->dev_addr
)) {
1862 BOND_AD_INFO(bond
).aggregator_identifier
= 0;
1864 BOND_AD_INFO(bond
).system
.sys_priority
= 0xFFFF;
1865 BOND_AD_INFO(bond
).system
.sys_mac_addr
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1867 /* initialize how many times this module is called in one
1868 * second (should be about every 100ms)
1870 ad_ticks_per_sec
= tick_resolution
;
1872 bond_3ad_initiate_agg_selection(bond
,
1873 AD_AGGREGATOR_SELECTION_TIMER
*
1879 * bond_3ad_bind_slave - initialize a slave's port
1880 * @slave: slave struct to work on
1882 * Returns: 0 on success
1885 void bond_3ad_bind_slave(struct slave
*slave
)
1887 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1889 struct aggregator
*aggregator
;
1891 /* check that the slave has not been initialized yet. */
1892 if (SLAVE_AD_INFO(slave
)->port
.slave
!= slave
) {
1894 /* port initialization */
1895 port
= &(SLAVE_AD_INFO(slave
)->port
);
1897 ad_initialize_port(port
, bond
->params
.lacp_fast
);
1899 port
->slave
= slave
;
1900 port
->actor_port_number
= SLAVE_AD_INFO(slave
)->id
;
1901 /* key is determined according to the link speed, duplex and user key(which
1902 * is yet not supported)
1904 port
->actor_admin_port_key
= 0;
1905 port
->actor_admin_port_key
|= __get_duplex(port
);
1906 port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
1907 port
->actor_oper_port_key
= port
->actor_admin_port_key
;
1908 /* if the port is not full duplex, then the port should be not
1911 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_MASKS
))
1912 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1913 /* actor system is the bond's system */
1914 port
->actor_system
= BOND_AD_INFO(bond
).system
.sys_mac_addr
;
1915 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1916 * lacpdu's are sent in one second)
1918 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1919 port
->aggregator
= NULL
;
1920 port
->next_port_in_aggregator
= NULL
;
1922 __disable_port(port
);
1924 /* aggregator initialization */
1925 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1927 ad_initialize_agg(aggregator
);
1929 aggregator
->aggregator_mac_address
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1930 aggregator
->aggregator_identifier
= ++BOND_AD_INFO(bond
).aggregator_identifier
;
1931 aggregator
->slave
= slave
;
1932 aggregator
->is_active
= 0;
1933 aggregator
->num_of_ports
= 0;
1938 * bond_3ad_unbind_slave - deinitialize a slave's port
1939 * @slave: slave struct to work on
1941 * Search for the aggregator that is related to this port, remove the
1942 * aggregator and assign another aggregator for other port related to it
1943 * (if any), and remove the port.
1945 void bond_3ad_unbind_slave(struct slave
*slave
)
1947 struct port
*port
, *prev_port
, *temp_port
;
1948 struct aggregator
*aggregator
, *new_aggregator
, *temp_aggregator
;
1949 int select_new_active_agg
= 0;
1950 struct bonding
*bond
= slave
->bond
;
1951 struct slave
*slave_iter
;
1952 struct list_head
*iter
;
1953 bool dummy_slave_update
; /* Ignore this value as caller updates array */
1955 /* Sync against bond_3ad_state_machine_handler() */
1956 spin_lock_bh(&bond
->mode_lock
);
1957 aggregator
= &(SLAVE_AD_INFO(slave
)->aggregator
);
1958 port
= &(SLAVE_AD_INFO(slave
)->port
);
1960 /* if slave is null, the whole port is not initialized */
1962 netdev_warn(bond
->dev
, "Trying to unbind an uninitialized port on %s\n",
1967 netdev_dbg(bond
->dev
, "Unbinding Link Aggregation Group %d\n",
1968 aggregator
->aggregator_identifier
);
1970 /* Tell the partner that this port is not suitable for aggregation */
1971 port
->actor_oper_port_state
&= ~AD_STATE_AGGREGATION
;
1972 __update_lacpdu_from_port(port
);
1973 ad_lacpdu_send(port
);
1975 /* check if this aggregator is occupied */
1976 if (aggregator
->lag_ports
) {
1977 /* check if there are other ports related to this aggregator
1978 * except the port related to this slave(thats ensure us that
1979 * there is a reason to search for new aggregator, and that we
1982 if ((aggregator
->lag_ports
!= port
) ||
1983 (aggregator
->lag_ports
->next_port_in_aggregator
)) {
1984 /* find new aggregator for the related port(s) */
1985 bond_for_each_slave(bond
, slave_iter
, iter
) {
1986 new_aggregator
= &(SLAVE_AD_INFO(slave_iter
)->aggregator
);
1987 /* if the new aggregator is empty, or it is
1988 * connected to our port only
1990 if (!new_aggregator
->lag_ports
||
1991 ((new_aggregator
->lag_ports
== port
) &&
1992 !new_aggregator
->lag_ports
->next_port_in_aggregator
))
1996 new_aggregator
= NULL
;
1998 /* if new aggregator found, copy the aggregator's
1999 * parameters and connect the related lag_ports to the
2002 if ((new_aggregator
) && ((!new_aggregator
->lag_ports
) || ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
))) {
2003 netdev_dbg(bond
->dev
, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2004 aggregator
->aggregator_identifier
,
2005 new_aggregator
->aggregator_identifier
);
2007 if ((new_aggregator
->lag_ports
== port
) &&
2008 new_aggregator
->is_active
) {
2009 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2010 select_new_active_agg
= 1;
2013 new_aggregator
->is_individual
= aggregator
->is_individual
;
2014 new_aggregator
->actor_admin_aggregator_key
= aggregator
->actor_admin_aggregator_key
;
2015 new_aggregator
->actor_oper_aggregator_key
= aggregator
->actor_oper_aggregator_key
;
2016 new_aggregator
->partner_system
= aggregator
->partner_system
;
2017 new_aggregator
->partner_system_priority
= aggregator
->partner_system_priority
;
2018 new_aggregator
->partner_oper_aggregator_key
= aggregator
->partner_oper_aggregator_key
;
2019 new_aggregator
->receive_state
= aggregator
->receive_state
;
2020 new_aggregator
->transmit_state
= aggregator
->transmit_state
;
2021 new_aggregator
->lag_ports
= aggregator
->lag_ports
;
2022 new_aggregator
->is_active
= aggregator
->is_active
;
2023 new_aggregator
->num_of_ports
= aggregator
->num_of_ports
;
2025 /* update the information that is written on
2026 * the ports about the aggregator
2028 for (temp_port
= aggregator
->lag_ports
; temp_port
;
2029 temp_port
= temp_port
->next_port_in_aggregator
) {
2030 temp_port
->aggregator
= new_aggregator
;
2031 temp_port
->actor_port_aggregator_identifier
= new_aggregator
->aggregator_identifier
;
2034 ad_clear_agg(aggregator
);
2036 if (select_new_active_agg
)
2037 ad_agg_selection_logic(__get_first_agg(port
),
2038 &dummy_slave_update
);
2040 netdev_warn(bond
->dev
, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2043 /* in case that the only port related to this
2044 * aggregator is the one we want to remove
2046 select_new_active_agg
= aggregator
->is_active
;
2047 ad_clear_agg(aggregator
);
2048 if (select_new_active_agg
) {
2049 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2050 /* select new active aggregator */
2051 temp_aggregator
= __get_first_agg(port
);
2052 if (temp_aggregator
)
2053 ad_agg_selection_logic(temp_aggregator
,
2054 &dummy_slave_update
);
2059 netdev_dbg(bond
->dev
, "Unbinding port %d\n", port
->actor_port_number
);
2061 /* find the aggregator that this port is connected to */
2062 bond_for_each_slave(bond
, slave_iter
, iter
) {
2063 temp_aggregator
= &(SLAVE_AD_INFO(slave_iter
)->aggregator
);
2065 /* search the port in the aggregator's related ports */
2066 for (temp_port
= temp_aggregator
->lag_ports
; temp_port
;
2067 prev_port
= temp_port
,
2068 temp_port
= temp_port
->next_port_in_aggregator
) {
2069 if (temp_port
== port
) {
2070 /* the aggregator found - detach the port from
2074 prev_port
->next_port_in_aggregator
= temp_port
->next_port_in_aggregator
;
2076 temp_aggregator
->lag_ports
= temp_port
->next_port_in_aggregator
;
2077 temp_aggregator
->num_of_ports
--;
2078 if (temp_aggregator
->num_of_ports
== 0) {
2079 select_new_active_agg
= temp_aggregator
->is_active
;
2080 ad_clear_agg(temp_aggregator
);
2081 if (select_new_active_agg
) {
2082 netdev_info(bond
->dev
, "Removing an active aggregator\n");
2083 /* select new active aggregator */
2084 ad_agg_selection_logic(__get_first_agg(port
),
2085 &dummy_slave_update
);
2095 spin_unlock_bh(&bond
->mode_lock
);
2099 * bond_3ad_state_machine_handler - handle state machines timeout
2100 * @bond: bonding struct to work on
2102 * The state machine handling concept in this module is to check every tick
2103 * which state machine should operate any function. The execution order is
2104 * round robin, so when we have an interaction between state machines, the
2105 * reply of one to each other might be delayed until next tick.
2107 * This function also complete the initialization when the agg_select_timer
2108 * times out, and it selects an aggregator for the ports that are yet not
2109 * related to any aggregator, and selects the active aggregator for a bond.
2111 void bond_3ad_state_machine_handler(struct work_struct
*work
)
2113 struct bonding
*bond
= container_of(work
, struct bonding
,
2115 struct aggregator
*aggregator
;
2116 struct list_head
*iter
;
2117 struct slave
*slave
;
2119 bool should_notify_rtnl
= BOND_SLAVE_NOTIFY_LATER
;
2120 bool update_slave_arr
= false;
2122 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2123 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2124 * concurrently due to incoming LACPDU as well.
2126 spin_lock_bh(&bond
->mode_lock
);
2129 /* check if there are any slaves */
2130 if (!bond_has_slaves(bond
))
2133 /* check if agg_select_timer timer after initialize is timed out */
2134 if (BOND_AD_INFO(bond
).agg_select_timer
&&
2135 !(--BOND_AD_INFO(bond
).agg_select_timer
)) {
2136 slave
= bond_first_slave_rcu(bond
);
2137 port
= slave
? &(SLAVE_AD_INFO(slave
)->port
) : NULL
;
2139 /* select the active aggregator for the bond */
2142 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2147 aggregator
= __get_first_agg(port
);
2148 ad_agg_selection_logic(aggregator
, &update_slave_arr
);
2150 bond_3ad_set_carrier(bond
);
2153 /* for each port run the state machines */
2154 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2155 port
= &(SLAVE_AD_INFO(slave
)->port
);
2157 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2162 ad_rx_machine(NULL
, port
);
2163 ad_periodic_machine(port
);
2164 ad_port_selection_logic(port
, &update_slave_arr
);
2165 ad_mux_machine(port
, &update_slave_arr
);
2166 ad_tx_machine(port
);
2168 /* turn off the BEGIN bit, since we already handled it */
2169 if (port
->sm_vars
& AD_PORT_BEGIN
)
2170 port
->sm_vars
&= ~AD_PORT_BEGIN
;
2174 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2175 if (slave
->should_notify
) {
2176 should_notify_rtnl
= BOND_SLAVE_NOTIFY_NOW
;
2181 spin_unlock_bh(&bond
->mode_lock
);
2183 if (update_slave_arr
)
2184 bond_slave_arr_work_rearm(bond
, 0);
2186 if (should_notify_rtnl
&& rtnl_trylock()) {
2187 bond_slave_state_notify(bond
);
2190 queue_delayed_work(bond
->wq
, &bond
->ad_work
, ad_delta_in_ticks
);
2194 * bond_3ad_rx_indication - handle a received frame
2195 * @lacpdu: received lacpdu
2196 * @slave: slave struct to work on
2197 * @length: length of the data received
2199 * It is assumed that frames that were sent on this NIC don't returned as new
2200 * received frames (loopback). Since only the payload is given to this
2201 * function, it check for loopback.
2203 static int bond_3ad_rx_indication(struct lacpdu
*lacpdu
, struct slave
*slave
,
2207 int ret
= RX_HANDLER_ANOTHER
;
2209 if (length
>= sizeof(struct lacpdu
)) {
2211 port
= &(SLAVE_AD_INFO(slave
)->port
);
2214 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2215 slave
->dev
->name
, slave
->bond
->dev
->name
);
2219 switch (lacpdu
->subtype
) {
2220 case AD_TYPE_LACPDU
:
2221 ret
= RX_HANDLER_CONSUMED
;
2222 netdev_dbg(slave
->bond
->dev
, "Received LACPDU on port %d\n",
2223 port
->actor_port_number
);
2224 /* Protect against concurrent state machines */
2225 spin_lock(&slave
->bond
->mode_lock
);
2226 ad_rx_machine(lacpdu
, port
);
2227 spin_unlock(&slave
->bond
->mode_lock
);
2230 case AD_TYPE_MARKER
:
2231 ret
= RX_HANDLER_CONSUMED
;
2232 /* No need to convert fields to Little Endian since we
2233 * don't use the marker's fields.
2236 switch (((struct bond_marker
*)lacpdu
)->tlv_type
) {
2237 case AD_MARKER_INFORMATION_SUBTYPE
:
2238 netdev_dbg(slave
->bond
->dev
, "Received Marker Information on port %d\n",
2239 port
->actor_port_number
);
2240 ad_marker_info_received((struct bond_marker
*)lacpdu
, port
);
2243 case AD_MARKER_RESPONSE_SUBTYPE
:
2244 netdev_dbg(slave
->bond
->dev
, "Received Marker Response on port %d\n",
2245 port
->actor_port_number
);
2246 ad_marker_response_received((struct bond_marker
*)lacpdu
, port
);
2250 netdev_dbg(slave
->bond
->dev
, "Received an unknown Marker subtype on slot %d\n",
2251 port
->actor_port_number
);
2259 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2260 * @slave: slave struct to work on
2262 * Handle reselection of aggregator (if needed) for this port.
2264 void bond_3ad_adapter_speed_changed(struct slave
*slave
)
2268 port
= &(SLAVE_AD_INFO(slave
)->port
);
2270 /* if slave is null, the whole port is not initialized */
2272 netdev_warn(slave
->bond
->dev
, "speed changed for uninitialized port on %s\n",
2277 spin_lock_bh(&slave
->bond
->mode_lock
);
2279 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_MASKS
;
2280 port
->actor_oper_port_key
= port
->actor_admin_port_key
|=
2281 (__get_link_speed(port
) << 1);
2282 netdev_dbg(slave
->bond
->dev
, "Port %d changed speed\n", port
->actor_port_number
);
2283 /* there is no need to reselect a new aggregator, just signal the
2284 * state machines to reinitialize
2286 port
->sm_vars
|= AD_PORT_BEGIN
;
2288 spin_unlock_bh(&slave
->bond
->mode_lock
);
2292 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2293 * @slave: slave struct to work on
2295 * Handle reselection of aggregator (if needed) for this port.
2297 void bond_3ad_adapter_duplex_changed(struct slave
*slave
)
2301 port
= &(SLAVE_AD_INFO(slave
)->port
);
2303 /* if slave is null, the whole port is not initialized */
2305 netdev_warn(slave
->bond
->dev
, "duplex changed for uninitialized port on %s\n",
2310 spin_lock_bh(&slave
->bond
->mode_lock
);
2312 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_MASKS
;
2313 port
->actor_oper_port_key
= port
->actor_admin_port_key
|=
2315 netdev_dbg(slave
->bond
->dev
, "Port %d changed duplex\n", port
->actor_port_number
);
2316 /* there is no need to reselect a new aggregator, just signal the
2317 * state machines to reinitialize
2319 port
->sm_vars
|= AD_PORT_BEGIN
;
2321 spin_unlock_bh(&slave
->bond
->mode_lock
);
2325 * bond_3ad_handle_link_change - handle a slave's link status change indication
2326 * @slave: slave struct to work on
2327 * @status: whether the link is now up or down
2329 * Handle reselection of aggregator (if needed) for this port.
2331 void bond_3ad_handle_link_change(struct slave
*slave
, char link
)
2335 port
= &(SLAVE_AD_INFO(slave
)->port
);
2337 /* if slave is null, the whole port is not initialized */
2339 netdev_warn(slave
->bond
->dev
, "link status changed for uninitialized port on %s\n",
2344 spin_lock_bh(&slave
->bond
->mode_lock
);
2345 /* on link down we are zeroing duplex and speed since
2346 * some of the adaptors(ce1000.lan) report full duplex/speed
2347 * instead of N/A(duplex) / 0(speed).
2349 * on link up we are forcing recheck on the duplex and speed since
2350 * some of he adaptors(ce1000.lan) report.
2352 if (link
== BOND_LINK_UP
) {
2353 port
->is_enabled
= true;
2354 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_MASKS
;
2355 port
->actor_oper_port_key
= port
->actor_admin_port_key
|=
2357 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_MASKS
;
2358 port
->actor_oper_port_key
= port
->actor_admin_port_key
|=
2359 (__get_link_speed(port
) << 1);
2361 /* link has failed */
2362 port
->is_enabled
= false;
2363 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_MASKS
;
2364 port
->actor_oper_port_key
= (port
->actor_admin_port_key
&=
2365 ~AD_SPEED_KEY_MASKS
);
2367 netdev_dbg(slave
->bond
->dev
, "Port %d changed link status to %s\n",
2368 port
->actor_port_number
,
2369 link
== BOND_LINK_UP
? "UP" : "DOWN");
2370 /* there is no need to reselect a new aggregator, just signal the
2371 * state machines to reinitialize
2373 port
->sm_vars
|= AD_PORT_BEGIN
;
2375 spin_unlock_bh(&slave
->bond
->mode_lock
);
2377 /* RTNL is held and mode_lock is released so it's safe
2378 * to update slave_array here.
2380 bond_update_slave_arr(slave
->bond
, NULL
);
2384 * bond_3ad_set_carrier - set link state for bonding master
2385 * @bond - bonding structure
2387 * if we have an active aggregator, we're up, if not, we're down.
2388 * Presumes that we cannot have an active aggregator if there are
2389 * no slaves with link up.
2391 * This behavior complies with IEEE 802.3 section 43.3.9.
2393 * Called by bond_set_carrier(). Return zero if carrier state does not
2394 * change, nonzero if it does.
2396 int bond_3ad_set_carrier(struct bonding
*bond
)
2398 struct aggregator
*active
;
2399 struct slave
*first_slave
;
2403 first_slave
= bond_first_slave_rcu(bond
);
2408 active
= __get_active_agg(&(SLAVE_AD_INFO(first_slave
)->aggregator
));
2410 /* are enough slaves available to consider link up? */
2411 if (active
->num_of_ports
< bond
->params
.min_links
) {
2412 if (netif_carrier_ok(bond
->dev
)) {
2413 netif_carrier_off(bond
->dev
);
2416 } else if (!netif_carrier_ok(bond
->dev
)) {
2417 netif_carrier_on(bond
->dev
);
2420 } else if (netif_carrier_ok(bond
->dev
)) {
2421 netif_carrier_off(bond
->dev
);
2429 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2430 * @bond: bonding struct to work on
2431 * @ad_info: ad_info struct to fill with the bond's info
2433 * Returns: 0 on success
2436 int __bond_3ad_get_active_agg_info(struct bonding
*bond
,
2437 struct ad_info
*ad_info
)
2439 struct aggregator
*aggregator
= NULL
;
2440 struct list_head
*iter
;
2441 struct slave
*slave
;
2444 bond_for_each_slave_rcu(bond
, slave
, iter
) {
2445 port
= &(SLAVE_AD_INFO(slave
)->port
);
2446 if (port
->aggregator
&& port
->aggregator
->is_active
) {
2447 aggregator
= port
->aggregator
;
2455 ad_info
->aggregator_id
= aggregator
->aggregator_identifier
;
2456 ad_info
->ports
= aggregator
->num_of_ports
;
2457 ad_info
->actor_key
= aggregator
->actor_oper_aggregator_key
;
2458 ad_info
->partner_key
= aggregator
->partner_oper_aggregator_key
;
2459 ether_addr_copy(ad_info
->partner_system
,
2460 aggregator
->partner_system
.mac_addr_value
);
2464 int bond_3ad_get_active_agg_info(struct bonding
*bond
, struct ad_info
*ad_info
)
2469 ret
= __bond_3ad_get_active_agg_info(bond
, ad_info
);
2475 int bond_3ad_lacpdu_recv(const struct sk_buff
*skb
, struct bonding
*bond
,
2476 struct slave
*slave
)
2478 struct lacpdu
*lacpdu
, _lacpdu
;
2480 if (skb
->protocol
!= PKT_TYPE_LACPDU
)
2481 return RX_HANDLER_ANOTHER
;
2483 lacpdu
= skb_header_pointer(skb
, 0, sizeof(_lacpdu
), &_lacpdu
);
2485 return RX_HANDLER_ANOTHER
;
2487 return bond_3ad_rx_indication(lacpdu
, slave
, skb
->len
);
2491 * bond_3ad_update_lacp_rate - change the lacp rate
2492 * @bond - bonding struct
2494 * When modify lacp_rate parameter via sysfs,
2495 * update actor_oper_port_state of each port.
2497 * Hold bond->mode_lock,
2498 * so we can modify port->actor_oper_port_state,
2499 * no matter bond is up or down.
2501 void bond_3ad_update_lacp_rate(struct bonding
*bond
)
2503 struct port
*port
= NULL
;
2504 struct list_head
*iter
;
2505 struct slave
*slave
;
2508 lacp_fast
= bond
->params
.lacp_fast
;
2509 spin_lock_bh(&bond
->mode_lock
);
2510 bond_for_each_slave(bond
, slave
, iter
) {
2511 port
= &(SLAVE_AD_INFO(slave
)->port
);
2513 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
2515 port
->actor_oper_port_state
&= ~AD_STATE_LACP_TIMEOUT
;
2517 spin_unlock_bh(&bond
->mode_lock
);