2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
23 #include <linux/skbuff.h>
24 #include <linux/if_ether.h>
25 #include <linux/netdevice.h>
26 #include <linux/spinlock.h>
27 #include <linux/ethtool.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_bonding.h>
30 #include <linux/pkt_sched.h>
31 #include <net/net_namespace.h>
35 // General definitions
36 #define AD_SHORT_TIMEOUT 1
37 #define AD_LONG_TIMEOUT 0
38 #define AD_STANDBY 0x2
39 #define AD_MAX_TX_IN_SECOND 3
40 #define AD_COLLECTOR_MAX_DELAY 0
42 // Timer definitions(43.4.4 in the 802.3ad standard)
43 #define AD_FAST_PERIODIC_TIME 1
44 #define AD_SLOW_PERIODIC_TIME 30
45 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
46 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
47 #define AD_CHURN_DETECTION_TIME 60
48 #define AD_AGGREGATE_WAIT_TIME 2
50 // Port state definitions(43.4.2.2 in the 802.3ad standard)
51 #define AD_STATE_LACP_ACTIVITY 0x1
52 #define AD_STATE_LACP_TIMEOUT 0x2
53 #define AD_STATE_AGGREGATION 0x4
54 #define AD_STATE_SYNCHRONIZATION 0x8
55 #define AD_STATE_COLLECTING 0x10
56 #define AD_STATE_DISTRIBUTING 0x20
57 #define AD_STATE_DEFAULTED 0x40
58 #define AD_STATE_EXPIRED 0x80
60 // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
61 #define AD_PORT_BEGIN 0x1
62 #define AD_PORT_LACP_ENABLED 0x2
63 #define AD_PORT_ACTOR_CHURN 0x4
64 #define AD_PORT_PARTNER_CHURN 0x8
65 #define AD_PORT_READY 0x10
66 #define AD_PORT_READY_N 0x20
67 #define AD_PORT_MATCHED 0x40
68 #define AD_PORT_STANDBY 0x80
69 #define AD_PORT_SELECTED 0x100
70 #define AD_PORT_MOVED 0x200
72 // Port Key definitions
73 // key is determined according to the link speed, duplex and
74 // user key(which is yet not supported)
75 // ------------------------------------------------------------
76 // Port key : | User key | Speed |Duplex|
77 // ------------------------------------------------------------
79 #define AD_DUPLEX_KEY_BITS 0x1
80 #define AD_SPEED_KEY_BITS 0x3E
81 #define AD_USER_KEY_BITS 0xFFC0
84 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1
85 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2
86 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4
87 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
88 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
91 // compare MAC addresses
92 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
94 static struct mac_addr null_mac_addr
= {{0, 0, 0, 0, 0, 0}};
95 static u16 ad_ticks_per_sec
;
96 static const int ad_delta_in_ticks
= (AD_TIMER_INTERVAL
* HZ
) / 1000;
98 // ================= 3AD api to bonding and kernel code ==================
99 static u16
__get_link_speed(struct port
*port
);
100 static u8
__get_duplex(struct port
*port
);
101 static inline void __initialize_port_locks(struct port
*port
);
103 static u16
__ad_timer_to_ticks(u16 timer_type
, u16 Par
);
106 // ================= ad code helper functions ==================
107 //needed by ad_rx_machine(...)
108 static void __record_pdu(struct lacpdu
*lacpdu
, struct port
*port
);
109 static void __record_default(struct port
*port
);
110 static void __update_selected(struct lacpdu
*lacpdu
, struct port
*port
);
111 static void __update_default_selected(struct port
*port
);
112 static void __choose_matched(struct lacpdu
*lacpdu
, struct port
*port
);
113 static void __update_ntt(struct lacpdu
*lacpdu
, struct port
*port
);
115 //needed for ad_mux_machine(..)
116 static void __attach_bond_to_agg(struct port
*port
);
117 static void __detach_bond_from_agg(struct port
*port
);
118 static int __agg_ports_are_ready(struct aggregator
*aggregator
);
119 static void __set_agg_ports_ready(struct aggregator
*aggregator
, int val
);
121 //needed for ad_agg_selection_logic(...)
122 static u32
__get_agg_bandwidth(struct aggregator
*aggregator
);
123 static struct aggregator
*__get_active_agg(struct aggregator
*aggregator
);
126 // ================= main 802.3ad protocol functions ==================
127 static int ad_lacpdu_send(struct port
*port
);
128 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
);
129 static void ad_mux_machine(struct port
*port
);
130 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
);
131 static void ad_tx_machine(struct port
*port
);
132 static void ad_periodic_machine(struct port
*port
);
133 static void ad_port_selection_logic(struct port
*port
);
134 static void ad_agg_selection_logic(struct aggregator
*aggregator
);
135 static void ad_clear_agg(struct aggregator
*aggregator
);
136 static void ad_initialize_agg(struct aggregator
*aggregator
);
137 static void ad_initialize_port(struct port
*port
, int lacp_fast
);
138 static void ad_initialize_lacpdu(struct lacpdu
*Lacpdu
);
139 static void ad_enable_collecting_distributing(struct port
*port
);
140 static void ad_disable_collecting_distributing(struct port
*port
);
141 static void ad_marker_info_received(struct bond_marker
*marker_info
, struct port
*port
);
142 static void ad_marker_response_received(struct bond_marker
*marker
, struct port
*port
);
145 /////////////////////////////////////////////////////////////////////////////////
146 // ================= api to bonding and kernel code ==================
147 /////////////////////////////////////////////////////////////////////////////////
150 * __get_bond_by_port - get the port's bonding struct
151 * @port: the port we're looking at
153 * Return @port's bonding struct, or %NULL if it can't be found.
155 static inline struct bonding
*__get_bond_by_port(struct port
*port
)
157 if (port
->slave
== NULL
) {
161 return bond_get_bond_by_slave(port
->slave
);
165 * __get_first_port - get the first port in the bond
166 * @bond: the bond we're looking at
168 * Return the port of the first slave in @bond, or %NULL if it can't be found.
170 static inline struct port
*__get_first_port(struct bonding
*bond
)
172 if (bond
->slave_cnt
== 0) {
176 return &(SLAVE_AD_INFO(bond
->first_slave
).port
);
180 * __get_next_port - get the next port in the bond
181 * @port: the port we're looking at
183 * Return the port of the slave that is next in line of @port's slave in the
184 * bond, or %NULL if it can't be found.
186 static inline struct port
*__get_next_port(struct port
*port
)
188 struct bonding
*bond
= __get_bond_by_port(port
);
189 struct slave
*slave
= port
->slave
;
191 // If there's no bond for this port, or this is the last slave
192 if ((bond
== NULL
) || (slave
->next
== bond
->first_slave
)) {
196 return &(SLAVE_AD_INFO(slave
->next
).port
);
200 * __get_first_agg - get the first aggregator in the bond
201 * @bond: the bond we're looking at
203 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
206 static inline struct aggregator
*__get_first_agg(struct port
*port
)
208 struct bonding
*bond
= __get_bond_by_port(port
);
210 // If there's no bond for this port, or bond has no slaves
211 if ((bond
== NULL
) || (bond
->slave_cnt
== 0)) {
215 return &(SLAVE_AD_INFO(bond
->first_slave
).aggregator
);
219 * __get_next_agg - get the next aggregator in the bond
220 * @aggregator: the aggregator we're looking at
222 * Return the aggregator of the slave that is next in line of @aggregator's
223 * slave in the bond, or %NULL if it can't be found.
225 static inline struct aggregator
*__get_next_agg(struct aggregator
*aggregator
)
227 struct slave
*slave
= aggregator
->slave
;
228 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
230 // If there's no bond for this aggregator, or this is the last slave
231 if ((bond
== NULL
) || (slave
->next
== bond
->first_slave
)) {
235 return &(SLAVE_AD_INFO(slave
->next
).aggregator
);
241 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
242 * address for the partner). Return 0 if not.
244 static inline int __agg_has_partner(struct aggregator
*agg
)
246 return !is_zero_ether_addr(agg
->partner_system
.mac_addr_value
);
250 * __disable_port - disable the port's slave
251 * @port: the port we're looking at
254 static inline void __disable_port(struct port
*port
)
256 bond_set_slave_inactive_flags(port
->slave
);
260 * __enable_port - enable the port's slave, if it's up
261 * @port: the port we're looking at
264 static inline void __enable_port(struct port
*port
)
266 struct slave
*slave
= port
->slave
;
268 if ((slave
->link
== BOND_LINK_UP
) && IS_UP(slave
->dev
)) {
269 bond_set_slave_active_flags(slave
);
274 * __port_is_enabled - check if the port's slave is in active state
275 * @port: the port we're looking at
278 static inline int __port_is_enabled(struct port
*port
)
280 return(port
->slave
->state
== BOND_STATE_ACTIVE
);
284 * __get_agg_selection_mode - get the aggregator selection mode
285 * @port: the port we're looking at
287 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
289 static inline u32
__get_agg_selection_mode(struct port
*port
)
291 struct bonding
*bond
= __get_bond_by_port(port
);
294 return BOND_AD_STABLE
;
297 return BOND_AD_INFO(bond
).agg_select_mode
;
301 * __check_agg_selection_timer - check if the selection timer has expired
302 * @port: the port we're looking at
305 static inline int __check_agg_selection_timer(struct port
*port
)
307 struct bonding
*bond
= __get_bond_by_port(port
);
313 return BOND_AD_INFO(bond
).agg_select_timer
? 1 : 0;
317 * __get_rx_machine_lock - lock the port's RX machine
318 * @port: the port we're looking at
321 static inline void __get_rx_machine_lock(struct port
*port
)
323 spin_lock_bh(&(SLAVE_AD_INFO(port
->slave
).rx_machine_lock
));
327 * __release_rx_machine_lock - unlock the port's RX machine
328 * @port: the port we're looking at
331 static inline void __release_rx_machine_lock(struct port
*port
)
333 spin_unlock_bh(&(SLAVE_AD_INFO(port
->slave
).rx_machine_lock
));
337 * __get_link_speed - get a port's speed
338 * @port: the port we're looking at
340 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
342 * %AD_LINK_SPEED_BITMASK_10MBPS,
343 * %AD_LINK_SPEED_BITMASK_100MBPS,
344 * %AD_LINK_SPEED_BITMASK_1000MBPS,
345 * %AD_LINK_SPEED_BITMASK_10000MBPS
347 static u16
__get_link_speed(struct port
*port
)
349 struct slave
*slave
= port
->slave
;
352 /* this if covers only a special case: when the configuration starts with
353 * link down, it sets the speed to 0.
354 * This is done in spite of the fact that the e100 driver reports 0 to be
355 * compatible with MVT in the future.*/
356 if (slave
->link
!= BOND_LINK_UP
) {
359 switch (slave
->speed
) {
361 speed
= AD_LINK_SPEED_BITMASK_10MBPS
;
365 speed
= AD_LINK_SPEED_BITMASK_100MBPS
;
369 speed
= AD_LINK_SPEED_BITMASK_1000MBPS
;
373 speed
= AD_LINK_SPEED_BITMASK_10000MBPS
;
377 speed
= 0; // unknown speed value from ethtool. shouldn't happen
382 pr_debug("Port %d Received link speed %d update from adapter\n", port
->actor_port_number
, speed
);
387 * __get_duplex - get a port's duplex
388 * @port: the port we're looking at
390 * Return @port's duplex in 802.3ad bitmask format. i.e.:
391 * 0x01 if in full duplex
394 static u8
__get_duplex(struct port
*port
)
396 struct slave
*slave
= port
->slave
;
400 // handling a special case: when the configuration starts with
401 // link down, it sets the duplex to 0.
402 if (slave
->link
!= BOND_LINK_UP
) {
405 switch (slave
->duplex
) {
408 pr_debug("Port %d Received status full duplex update from adapter\n", port
->actor_port_number
);
413 pr_debug("Port %d Received status NOT full duplex update from adapter\n", port
->actor_port_number
);
421 * __initialize_port_locks - initialize a port's RX machine spinlock
422 * @port: the port we're looking at
425 static inline void __initialize_port_locks(struct port
*port
)
427 // make sure it isn't called twice
428 spin_lock_init(&(SLAVE_AD_INFO(port
->slave
).rx_machine_lock
));
434 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
435 * @timer_type: which timer to operate
436 * @par: timer parameter. see below
438 * If @timer_type is %current_while_timer, @par indicates long/short timer.
439 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
440 * %SLOW_PERIODIC_TIME.
442 static u16
__ad_timer_to_ticks(u16 timer_type
, u16 par
)
444 u16 retval
=0; //to silence the compiler
446 switch (timer_type
) {
447 case AD_CURRENT_WHILE_TIMER
: // for rx machine usage
448 if (par
) { // for short or long timeout
449 retval
= (AD_SHORT_TIMEOUT_TIME
*ad_ticks_per_sec
); // short timeout
451 retval
= (AD_LONG_TIMEOUT_TIME
*ad_ticks_per_sec
); // long timeout
454 case AD_ACTOR_CHURN_TIMER
: // for local churn machine
455 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
457 case AD_PERIODIC_TIMER
: // for periodic machine
458 retval
= (par
*ad_ticks_per_sec
); // long timeout
460 case AD_PARTNER_CHURN_TIMER
: // for remote churn machine
461 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
463 case AD_WAIT_WHILE_TIMER
: // for selection machine
464 retval
= (AD_AGGREGATE_WAIT_TIME
*ad_ticks_per_sec
);
471 /////////////////////////////////////////////////////////////////////////////////
472 // ================= ad_rx_machine helper functions ==================
473 /////////////////////////////////////////////////////////////////////////////////
476 * __record_pdu - record parameters from a received lacpdu
477 * @lacpdu: the lacpdu we've received
478 * @port: the port we're looking at
480 * Record the parameter values for the Actor carried in a received lacpdu as
481 * the current partner operational parameter values and sets
482 * actor_oper_port_state.defaulted to FALSE.
484 static void __record_pdu(struct lacpdu
*lacpdu
, struct port
*port
)
486 if (lacpdu
&& port
) {
487 struct port_params
*partner
= &port
->partner_oper
;
489 // record the new parameter values for the partner operational
490 partner
->port_number
= ntohs(lacpdu
->actor_port
);
491 partner
->port_priority
= ntohs(lacpdu
->actor_port_priority
);
492 partner
->system
= lacpdu
->actor_system
;
493 partner
->system_priority
= ntohs(lacpdu
->actor_system_priority
);
494 partner
->key
= ntohs(lacpdu
->actor_key
);
495 partner
->port_state
= lacpdu
->actor_state
;
497 // set actor_oper_port_state.defaulted to FALSE
498 port
->actor_oper_port_state
&= ~AD_STATE_DEFAULTED
;
500 // set the partner sync. to on if the partner is sync. and the port is matched
501 if ((port
->sm_vars
& AD_PORT_MATCHED
) && (lacpdu
->actor_state
& AD_STATE_SYNCHRONIZATION
)) {
502 partner
->port_state
|= AD_STATE_SYNCHRONIZATION
;
504 partner
->port_state
&= ~AD_STATE_SYNCHRONIZATION
;
510 * __record_default - record default parameters
511 * @port: the port we're looking at
513 * This function records the default parameter values for the partner carried
514 * in the Partner Admin parameters as the current partner operational parameter
515 * values and sets actor_oper_port_state.defaulted to TRUE.
517 static void __record_default(struct port
*port
)
520 // record the partner admin parameters
521 memcpy(&port
->partner_oper
, &port
->partner_admin
,
522 sizeof(struct port_params
));
524 // set actor_oper_port_state.defaulted to true
525 port
->actor_oper_port_state
|= AD_STATE_DEFAULTED
;
530 * __update_selected - update a port's Selected variable from a received lacpdu
531 * @lacpdu: the lacpdu we've received
532 * @port: the port we're looking at
534 * Update the value of the selected variable, using parameter values from a
535 * newly received lacpdu. The parameter values for the Actor carried in the
536 * received PDU are compared with the corresponding operational parameter
537 * values for the ports partner. If one or more of the comparisons shows that
538 * the value(s) received in the PDU differ from the current operational values,
539 * then selected is set to FALSE and actor_oper_port_state.synchronization is
540 * set to out_of_sync. Otherwise, selected remains unchanged.
542 static void __update_selected(struct lacpdu
*lacpdu
, struct port
*port
)
544 // validate lacpdu and port
545 if (lacpdu
&& port
) {
546 // check if any parameter is different
547 if ((ntohs(lacpdu
->actor_port
) != port
->partner_oper
.port_number
) ||
548 (ntohs(lacpdu
->actor_port_priority
) != port
->partner_oper
.port_priority
) ||
549 MAC_ADDRESS_COMPARE(&(lacpdu
->actor_system
), &(port
->partner_oper
.system
)) ||
550 (ntohs(lacpdu
->actor_system_priority
) != port
->partner_oper
.system_priority
) ||
551 (ntohs(lacpdu
->actor_key
) != port
->partner_oper
.key
) ||
552 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) != (port
->partner_oper
.port_state
& AD_STATE_AGGREGATION
))
554 // update the state machine Selected variable
555 port
->sm_vars
&= ~AD_PORT_SELECTED
;
561 * __update_default_selected - update a port's Selected variable from Partner
562 * @port: the port we're looking at
564 * This function updates the value of the selected variable, using the partner
565 * administrative parameter values. The administrative values are compared with
566 * the corresponding operational parameter values for the partner. If one or
567 * more of the comparisons shows that the administrative value(s) differ from
568 * the current operational values, then Selected is set to FALSE and
569 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
570 * Selected remains unchanged.
572 static void __update_default_selected(struct port
*port
)
576 // check if any parameter is different
577 if ((port
->partner_admin
.port_number
!= port
->partner_oper
.port_number
) ||
578 (port
->partner_admin
.port_priority
!= port
->partner_oper
.port_priority
) ||
579 MAC_ADDRESS_COMPARE(&(port
->partner_admin
.system
), &(port
->partner_oper
.system
)) ||
580 (port
->partner_admin
.system_priority
!= port
->partner_oper
.system_priority
) ||
581 (port
->partner_admin
.key
!= port
->partner_oper
.key
) ||
582 ((port
->partner_admin
.port_state
& AD_STATE_AGGREGATION
) != (port
->partner_oper
.port_state
& AD_STATE_AGGREGATION
))
584 // update the state machine Selected variable
585 port
->sm_vars
&= ~AD_PORT_SELECTED
;
591 * __choose_matched - update a port's matched variable from a received lacpdu
592 * @lacpdu: the lacpdu we've received
593 * @port: the port we're looking at
595 * Update the value of the matched variable, using parameter values from a
596 * newly received lacpdu. Parameter values for the partner carried in the
597 * received PDU are compared with the corresponding operational parameter
598 * values for the actor. Matched is set to TRUE if all of these parameters
599 * match and the PDU parameter partner_state.aggregation has the same value as
600 * actor_oper_port_state.aggregation and lacp will actively maintain the link
601 * in the aggregation. Matched is also set to TRUE if the value of
602 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
603 * an individual link and lacp will actively maintain the link. Otherwise,
604 * matched is set to FALSE. LACP is considered to be actively maintaining the
605 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
606 * the actor's actor_oper_port_state.lacp_activity and the PDU's
607 * partner_state.lacp_activity variables are TRUE.
609 static void __choose_matched(struct lacpdu
*lacpdu
, struct port
*port
)
611 // validate lacpdu and port
612 if (lacpdu
&& port
) {
613 // check if all parameters are alike
614 if (((ntohs(lacpdu
->partner_port
) == port
->actor_port_number
) &&
615 (ntohs(lacpdu
->partner_port_priority
) == port
->actor_port_priority
) &&
616 !MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) &&
617 (ntohs(lacpdu
->partner_system_priority
) == port
->actor_system_priority
) &&
618 (ntohs(lacpdu
->partner_key
) == port
->actor_oper_port_key
) &&
619 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) == (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))) ||
620 // or this is individual link(aggregation == FALSE)
621 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) == 0)
623 // update the state machine Matched variable
624 port
->sm_vars
|= AD_PORT_MATCHED
;
626 port
->sm_vars
&= ~AD_PORT_MATCHED
;
632 * __update_ntt - update a port's ntt variable from a received lacpdu
633 * @lacpdu: the lacpdu we've received
634 * @port: the port we're looking at
636 * Updates the value of the ntt variable, using parameter values from a newly
637 * received lacpdu. The parameter values for the partner carried in the
638 * received PDU are compared with the corresponding operational parameter
639 * values for the Actor. If one or more of the comparisons shows that the
640 * value(s) received in the PDU differ from the current operational values,
641 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
643 static void __update_ntt(struct lacpdu
*lacpdu
, struct port
*port
)
645 // validate lacpdu and port
646 if (lacpdu
&& port
) {
647 // check if any parameter is different
648 if ((ntohs(lacpdu
->partner_port
) != port
->actor_port_number
) ||
649 (ntohs(lacpdu
->partner_port_priority
) != port
->actor_port_priority
) ||
650 MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) ||
651 (ntohs(lacpdu
->partner_system_priority
) != port
->actor_system_priority
) ||
652 (ntohs(lacpdu
->partner_key
) != port
->actor_oper_port_key
) ||
653 ((lacpdu
->partner_state
& AD_STATE_LACP_ACTIVITY
) != (port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
)) ||
654 ((lacpdu
->partner_state
& AD_STATE_LACP_TIMEOUT
) != (port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) ||
655 ((lacpdu
->partner_state
& AD_STATE_SYNCHRONIZATION
) != (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) ||
656 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) != (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))
658 // set ntt to be TRUE
665 * __attach_bond_to_agg
666 * @port: the port we're looking at
668 * Handle the attaching of the port's control parser/multiplexer and the
669 * aggregator. This function does nothing since the parser/multiplexer of the
670 * receive and the parser/multiplexer of the aggregator are already combined.
672 static void __attach_bond_to_agg(struct port
*port
)
674 port
=NULL
; // just to satisfy the compiler
675 // This function does nothing since the parser/multiplexer of the receive
676 // and the parser/multiplexer of the aggregator are already combined
680 * __detach_bond_from_agg
681 * @port: the port we're looking at
683 * Handle the detaching of the port's control parser/multiplexer from the
684 * aggregator. This function does nothing since the parser/multiplexer of the
685 * receive and the parser/multiplexer of the aggregator are already combined.
687 static void __detach_bond_from_agg(struct port
*port
)
689 port
=NULL
; // just to satisfy the compiler
690 // This function does nothing sience the parser/multiplexer of the receive
691 // and the parser/multiplexer of the aggregator are already combined
695 * __agg_ports_are_ready - check if all ports in an aggregator are ready
696 * @aggregator: the aggregator we're looking at
699 static int __agg_ports_are_ready(struct aggregator
*aggregator
)
705 // scan all ports in this aggregator to verfy if they are all ready
706 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
707 if (!(port
->sm_vars
& AD_PORT_READY_N
)) {
718 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
719 * @aggregator: the aggregator we're looking at
720 * @val: Should the ports' ready bit be set on or off
723 static void __set_agg_ports_ready(struct aggregator
*aggregator
, int val
)
727 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
729 port
->sm_vars
|= AD_PORT_READY
;
731 port
->sm_vars
&= ~AD_PORT_READY
;
737 * __get_agg_bandwidth - get the total bandwidth of an aggregator
738 * @aggregator: the aggregator we're looking at
741 static u32
__get_agg_bandwidth(struct aggregator
*aggregator
)
746 if (aggregator
->num_of_ports
) {
747 basic_speed
= __get_link_speed(aggregator
->lag_ports
);
748 switch (basic_speed
) {
749 case AD_LINK_SPEED_BITMASK_1MBPS
:
750 bandwidth
= aggregator
->num_of_ports
;
752 case AD_LINK_SPEED_BITMASK_10MBPS
:
753 bandwidth
= aggregator
->num_of_ports
* 10;
755 case AD_LINK_SPEED_BITMASK_100MBPS
:
756 bandwidth
= aggregator
->num_of_ports
* 100;
758 case AD_LINK_SPEED_BITMASK_1000MBPS
:
759 bandwidth
= aggregator
->num_of_ports
* 1000;
761 case AD_LINK_SPEED_BITMASK_10000MBPS
:
762 bandwidth
= aggregator
->num_of_ports
* 10000;
765 bandwidth
=0; // to silent the compilor ....
772 * __get_active_agg - get the current active aggregator
773 * @aggregator: the aggregator we're looking at
776 static struct aggregator
*__get_active_agg(struct aggregator
*aggregator
)
778 struct aggregator
*retval
= NULL
;
780 for (; aggregator
; aggregator
= __get_next_agg(aggregator
)) {
781 if (aggregator
->is_active
) {
791 * __update_lacpdu_from_port - update a port's lacpdu fields
792 * @port: the port we're looking at
795 static inline void __update_lacpdu_from_port(struct port
*port
)
797 struct lacpdu
*lacpdu
= &port
->lacpdu
;
799 /* update current actual Actor parameters */
800 /* lacpdu->subtype initialized
801 * lacpdu->version_number initialized
802 * lacpdu->tlv_type_actor_info initialized
803 * lacpdu->actor_information_length initialized
806 lacpdu
->actor_system_priority
= htons(port
->actor_system_priority
);
807 lacpdu
->actor_system
= port
->actor_system
;
808 lacpdu
->actor_key
= htons(port
->actor_oper_port_key
);
809 lacpdu
->actor_port_priority
= htons(port
->actor_port_priority
);
810 lacpdu
->actor_port
= htons(port
->actor_port_number
);
811 lacpdu
->actor_state
= port
->actor_oper_port_state
;
813 /* lacpdu->reserved_3_1 initialized
814 * lacpdu->tlv_type_partner_info initialized
815 * lacpdu->partner_information_length initialized
818 lacpdu
->partner_system_priority
= htons(port
->partner_oper
.system_priority
);
819 lacpdu
->partner_system
= port
->partner_oper
.system
;
820 lacpdu
->partner_key
= htons(port
->partner_oper
.key
);
821 lacpdu
->partner_port_priority
= htons(port
->partner_oper
.port_priority
);
822 lacpdu
->partner_port
= htons(port
->partner_oper
.port_number
);
823 lacpdu
->partner_state
= port
->partner_oper
.port_state
;
825 /* lacpdu->reserved_3_2 initialized
826 * lacpdu->tlv_type_collector_info initialized
827 * lacpdu->collector_information_length initialized
828 * collector_max_delay initialized
829 * reserved_12[12] initialized
830 * tlv_type_terminator initialized
831 * terminator_length initialized
832 * reserved_50[50] initialized
836 //////////////////////////////////////////////////////////////////////////////////////
837 // ================= main 802.3ad protocol code ======================================
838 //////////////////////////////////////////////////////////////////////////////////////
841 * ad_lacpdu_send - send out a lacpdu packet on a given port
842 * @port: the port we're looking at
844 * Returns: 0 on success
847 static int ad_lacpdu_send(struct port
*port
)
849 struct slave
*slave
= port
->slave
;
851 struct lacpdu_header
*lacpdu_header
;
852 int length
= sizeof(struct lacpdu_header
);
853 struct mac_addr lacpdu_multicast_address
= AD_MULTICAST_LACPDU_ADDR
;
855 skb
= dev_alloc_skb(length
);
860 skb
->dev
= slave
->dev
;
861 skb_reset_mac_header(skb
);
862 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
863 skb
->protocol
= PKT_TYPE_LACPDU
;
864 skb
->priority
= TC_PRIO_CONTROL
;
866 lacpdu_header
= (struct lacpdu_header
*)skb_put(skb
, length
);
868 lacpdu_header
->ad_header
.destination_address
= lacpdu_multicast_address
;
869 /* Note: source addres is set to be the member's PERMANENT address, because we use it
870 to identify loopback lacpdus in receive. */
871 lacpdu_header
->ad_header
.source_address
= *((struct mac_addr
*)(slave
->perm_hwaddr
));
872 lacpdu_header
->ad_header
.length_type
= PKT_TYPE_LACPDU
;
874 lacpdu_header
->lacpdu
= port
->lacpdu
; // struct copy
882 * ad_marker_send - send marker information/response on a given port
883 * @port: the port we're looking at
884 * @marker: marker data to send
886 * Returns: 0 on success
889 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
)
891 struct slave
*slave
= port
->slave
;
893 struct bond_marker_header
*marker_header
;
894 int length
= sizeof(struct bond_marker_header
);
895 struct mac_addr lacpdu_multicast_address
= AD_MULTICAST_LACPDU_ADDR
;
897 skb
= dev_alloc_skb(length
+ 16);
902 skb_reserve(skb
, 16);
904 skb
->dev
= slave
->dev
;
905 skb_reset_mac_header(skb
);
906 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
907 skb
->protocol
= PKT_TYPE_LACPDU
;
909 marker_header
= (struct bond_marker_header
*)skb_put(skb
, length
);
911 marker_header
->ad_header
.destination_address
= lacpdu_multicast_address
;
912 /* Note: source addres is set to be the member's PERMANENT address, because we use it
913 to identify loopback MARKERs in receive. */
914 marker_header
->ad_header
.source_address
= *((struct mac_addr
*)(slave
->perm_hwaddr
));
915 marker_header
->ad_header
.length_type
= PKT_TYPE_LACPDU
;
917 marker_header
->marker
= *marker
; // struct copy
925 * ad_mux_machine - handle a port's mux state machine
926 * @port: the port we're looking at
929 static void ad_mux_machine(struct port
*port
)
931 mux_states_t last_state
;
933 // keep current State Machine state to compare later if it was changed
934 last_state
= port
->sm_mux_state
;
936 if (port
->sm_vars
& AD_PORT_BEGIN
) {
937 port
->sm_mux_state
= AD_MUX_DETACHED
; // next state
939 switch (port
->sm_mux_state
) {
940 case AD_MUX_DETACHED
:
941 if ((port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
)) { // if SELECTED or STANDBY
942 port
->sm_mux_state
= AD_MUX_WAITING
; // next state
946 // if SELECTED == FALSE return to DETACH state
947 if (!(port
->sm_vars
& AD_PORT_SELECTED
)) { // if UNSELECTED
948 port
->sm_vars
&= ~AD_PORT_READY_N
;
949 // in order to withhold the Selection Logic to check all ports READY_N value
950 // every callback cycle to update ready variable, we check READY_N and update READY here
951 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
952 port
->sm_mux_state
= AD_MUX_DETACHED
; // next state
956 // check if the wait_while_timer expired
957 if (port
->sm_mux_timer_counter
&& !(--port
->sm_mux_timer_counter
)) {
958 port
->sm_vars
|= AD_PORT_READY_N
;
961 // in order to withhold the selection logic to check all ports READY_N value
962 // every callback cycle to update ready variable, we check READY_N and update READY here
963 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
965 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
966 if ((port
->sm_vars
& AD_PORT_READY
) && !port
->sm_mux_timer_counter
) {
967 port
->sm_mux_state
= AD_MUX_ATTACHED
; // next state
970 case AD_MUX_ATTACHED
:
971 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
972 if ((port
->sm_vars
& AD_PORT_SELECTED
) && (port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) && !__check_agg_selection_timer(port
)) {
973 port
->sm_mux_state
= AD_MUX_COLLECTING_DISTRIBUTING
;// next state
974 } else if (!(port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
)) { // if UNSELECTED or STANDBY
975 port
->sm_vars
&= ~AD_PORT_READY_N
;
976 // in order to withhold the selection logic to check all ports READY_N value
977 // every callback cycle to update ready variable, we check READY_N and update READY here
978 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
979 port
->sm_mux_state
= AD_MUX_DETACHED
;// next state
982 case AD_MUX_COLLECTING_DISTRIBUTING
:
983 if (!(port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
) ||
984 !(port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
)
986 port
->sm_mux_state
= AD_MUX_ATTACHED
;// next state
989 // if port state hasn't changed make
990 // sure that a collecting distributing
991 // port in an active aggregator is enabled
992 if (port
->aggregator
&&
993 port
->aggregator
->is_active
&&
994 !__port_is_enabled(port
)) {
1000 default: //to silence the compiler
1005 // check if the state machine was changed
1006 if (port
->sm_mux_state
!= last_state
) {
1007 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port
->actor_port_number
, last_state
, port
->sm_mux_state
);
1008 switch (port
->sm_mux_state
) {
1009 case AD_MUX_DETACHED
:
1010 __detach_bond_from_agg(port
);
1011 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1012 ad_disable_collecting_distributing(port
);
1013 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
1014 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
1017 case AD_MUX_WAITING
:
1018 port
->sm_mux_timer_counter
= __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER
, 0);
1020 case AD_MUX_ATTACHED
:
1021 __attach_bond_to_agg(port
);
1022 port
->actor_oper_port_state
|= AD_STATE_SYNCHRONIZATION
;
1023 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
1024 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
1025 ad_disable_collecting_distributing(port
);
1028 case AD_MUX_COLLECTING_DISTRIBUTING
:
1029 port
->actor_oper_port_state
|= AD_STATE_COLLECTING
;
1030 port
->actor_oper_port_state
|= AD_STATE_DISTRIBUTING
;
1031 ad_enable_collecting_distributing(port
);
1034 default: //to silence the compiler
1041 * ad_rx_machine - handle a port's rx State Machine
1042 * @lacpdu: the lacpdu we've received
1043 * @port: the port we're looking at
1045 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1046 * CURRENT. If timer expired set the state machine in the proper state.
1047 * In other cases, this function checks if we need to switch to other state.
1049 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
)
1051 rx_states_t last_state
;
1053 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1054 __get_rx_machine_lock(port
);
1056 // keep current State Machine state to compare later if it was changed
1057 last_state
= port
->sm_rx_state
;
1059 // check if state machine should change state
1060 // first, check if port was reinitialized
1061 if (port
->sm_vars
& AD_PORT_BEGIN
) {
1062 port
->sm_rx_state
= AD_RX_INITIALIZE
; // next state
1064 // check if port is not enabled
1065 else if (!(port
->sm_vars
& AD_PORT_BEGIN
) && !port
->is_enabled
&& !(port
->sm_vars
& AD_PORT_MOVED
)) {
1066 port
->sm_rx_state
= AD_RX_PORT_DISABLED
; // next state
1068 // check if new lacpdu arrived
1069 else if (lacpdu
&& ((port
->sm_rx_state
== AD_RX_EXPIRED
) || (port
->sm_rx_state
== AD_RX_DEFAULTED
) || (port
->sm_rx_state
== AD_RX_CURRENT
))) {
1070 port
->sm_rx_timer_counter
= 0; // zero timer
1071 port
->sm_rx_state
= AD_RX_CURRENT
;
1073 // if timer is on, and if it is expired
1074 if (port
->sm_rx_timer_counter
&& !(--port
->sm_rx_timer_counter
)) {
1075 switch (port
->sm_rx_state
) {
1077 port
->sm_rx_state
= AD_RX_DEFAULTED
; // next state
1080 port
->sm_rx_state
= AD_RX_EXPIRED
; // next state
1082 default: //to silence the compiler
1086 // if no lacpdu arrived and no timer is on
1087 switch (port
->sm_rx_state
) {
1088 case AD_RX_PORT_DISABLED
:
1089 if (port
->sm_vars
& AD_PORT_MOVED
) {
1090 port
->sm_rx_state
= AD_RX_INITIALIZE
; // next state
1091 } else if (port
->is_enabled
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1092 port
->sm_rx_state
= AD_RX_EXPIRED
; // next state
1093 } else if (port
->is_enabled
&& ((port
->sm_vars
& AD_PORT_LACP_ENABLED
) == 0)) {
1094 port
->sm_rx_state
= AD_RX_LACP_DISABLED
; // next state
1097 default: //to silence the compiler
1104 // check if the State machine was changed or new lacpdu arrived
1105 if ((port
->sm_rx_state
!= last_state
) || (lacpdu
)) {
1106 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port
->actor_port_number
, last_state
, port
->sm_rx_state
);
1107 switch (port
->sm_rx_state
) {
1108 case AD_RX_INITIALIZE
:
1109 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
)) {
1110 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1112 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
1114 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1115 __record_default(port
);
1116 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1117 port
->sm_vars
&= ~AD_PORT_MOVED
;
1118 port
->sm_rx_state
= AD_RX_PORT_DISABLED
; // next state
1120 /*- Fall Through -*/
1122 case AD_RX_PORT_DISABLED
:
1123 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1125 case AD_RX_LACP_DISABLED
:
1126 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1127 __record_default(port
);
1128 port
->partner_oper
.port_state
&= ~AD_STATE_AGGREGATION
;
1129 port
->sm_vars
|= AD_PORT_MATCHED
;
1130 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1133 //Reset of the Synchronization flag. (Standard 43.4.12)
1134 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1135 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1136 port
->partner_oper
.port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1137 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1138 port
->partner_oper
.port_state
|= AD_SHORT_TIMEOUT
;
1139 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(AD_SHORT_TIMEOUT
));
1140 port
->actor_oper_port_state
|= AD_STATE_EXPIRED
;
1142 case AD_RX_DEFAULTED
:
1143 __update_default_selected(port
);
1144 __record_default(port
);
1145 port
->sm_vars
|= AD_PORT_MATCHED
;
1146 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1149 // detect loopback situation
1150 if (!MAC_ADDRESS_COMPARE(&(lacpdu
->actor_system
), &(port
->actor_system
))) {
1151 // INFO_RECEIVED_LOOPBACK_FRAMES
1152 printk(KERN_ERR DRV_NAME
": %s: An illegal loopback occurred on "
1153 "adapter (%s). Check the configuration to verify that all "
1154 "Adapters are connected to 802.3ad compliant switch ports\n",
1155 port
->slave
->dev
->master
->name
, port
->slave
->dev
->name
);
1156 __release_rx_machine_lock(port
);
1159 __update_selected(lacpdu
, port
);
1160 __update_ntt(lacpdu
, port
);
1161 __record_pdu(lacpdu
, port
);
1162 __choose_matched(lacpdu
, port
);
1163 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
));
1164 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1165 // verify that if the aggregator is enabled, the port is enabled too.
1166 //(because if the link goes down for a short time, the 802.3ad will not
1167 // catch it, and the port will continue to be disabled)
1168 if (port
->aggregator
&& port
->aggregator
->is_active
&& !__port_is_enabled(port
)) {
1169 __enable_port(port
);
1172 default: //to silence the compiler
1176 __release_rx_machine_lock(port
);
1180 * ad_tx_machine - handle a port's tx state machine
1181 * @port: the port we're looking at
1184 static void ad_tx_machine(struct port
*port
)
1186 // check if tx timer expired, to verify that we do not send more than 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", port
->actor_port_number
);
1194 // mark ntt as false, so it will not be sent again until demanded
1198 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1199 port
->sm_tx_timer_counter
=ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1204 * ad_periodic_machine - handle a port's periodic state machine
1205 * @port: the port we're looking at
1207 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1209 static void ad_periodic_machine(struct port
*port
)
1211 periodic_states_t last_state
;
1213 // keep current state machine state to compare later if it was changed
1214 last_state
= port
->sm_periodic_state
;
1216 // check if port was reinitialized
1217 if (((port
->sm_vars
& AD_PORT_BEGIN
) || !(port
->sm_vars
& AD_PORT_LACP_ENABLED
) || !port
->is_enabled
) ||
1218 (!(port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
) && !(port
->partner_oper
.port_state
& AD_STATE_LACP_ACTIVITY
))
1220 port
->sm_periodic_state
= AD_NO_PERIODIC
; // next state
1222 // check if state machine should change state
1223 else if (port
->sm_periodic_timer_counter
) {
1224 // check if periodic state machine expired
1225 if (!(--port
->sm_periodic_timer_counter
)) {
1226 // if expired then do tx
1227 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1229 // If not expired, check if there is some new timeout parameter from the partner state
1230 switch (port
->sm_periodic_state
) {
1231 case AD_FAST_PERIODIC
:
1232 if (!(port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1233 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1236 case AD_SLOW_PERIODIC
:
1237 if ((port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1238 // stop current timer
1239 port
->sm_periodic_timer_counter
= 0;
1240 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1243 default: //to silence the compiler
1248 switch (port
->sm_periodic_state
) {
1249 case AD_NO_PERIODIC
:
1250 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1252 case AD_PERIODIC_TX
:
1253 if (!(port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1254 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1256 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1259 default: //to silence the compiler
1264 // check if the state machine was changed
1265 if (port
->sm_periodic_state
!= last_state
) {
1266 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port
->actor_port_number
, last_state
, port
->sm_periodic_state
);
1267 switch (port
->sm_periodic_state
) {
1268 case AD_NO_PERIODIC
:
1269 port
->sm_periodic_timer_counter
= 0; // zero timer
1271 case AD_FAST_PERIODIC
:
1272 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_FAST_PERIODIC_TIME
))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1274 case AD_SLOW_PERIODIC
:
1275 port
->sm_periodic_timer_counter
= __ad_timer_to_ticks(AD_PERIODIC_TIMER
, (u16
)(AD_SLOW_PERIODIC_TIME
))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1277 case AD_PERIODIC_TX
:
1280 default: //to silence the compiler
1287 * ad_port_selection_logic - select aggregation groups
1288 * @port: the port we're looking at
1290 * Select aggregation groups, and assign each port for it's aggregetor. The
1291 * selection logic is called in the inititalization (after all the handshkes),
1292 * and after every lacpdu receive (if selected is off).
1294 static void ad_port_selection_logic(struct port
*port
)
1296 struct aggregator
*aggregator
, *free_aggregator
= NULL
, *temp_aggregator
;
1297 struct port
*last_port
= NULL
, *curr_port
;
1300 // if the port is already Selected, do nothing
1301 if (port
->sm_vars
& AD_PORT_SELECTED
) {
1305 // if the port is connected to other aggregator, detach it
1306 if (port
->aggregator
) {
1307 // detach the port from its former aggregator
1308 temp_aggregator
=port
->aggregator
;
1309 for (curr_port
=temp_aggregator
->lag_ports
; curr_port
; last_port
=curr_port
, curr_port
=curr_port
->next_port_in_aggregator
) {
1310 if (curr_port
== port
) {
1311 temp_aggregator
->num_of_ports
--;
1312 if (!last_port
) {// if it is the first port attached to the aggregator
1313 temp_aggregator
->lag_ports
=port
->next_port_in_aggregator
;
1314 } else {// not the first port attached to the aggregator
1315 last_port
->next_port_in_aggregator
=port
->next_port_in_aggregator
;
1318 // clear the port's relations to this aggregator
1319 port
->aggregator
= NULL
;
1320 port
->next_port_in_aggregator
=NULL
;
1321 port
->actor_port_aggregator_identifier
=0;
1323 pr_debug("Port %d left LAG %d\n", port
->actor_port_number
, temp_aggregator
->aggregator_identifier
);
1324 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1325 if (!temp_aggregator
->lag_ports
) {
1326 ad_clear_agg(temp_aggregator
);
1331 if (!curr_port
) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1332 printk(KERN_WARNING DRV_NAME
": %s: Warning: Port %d (on %s) was "
1333 "related to aggregator %d but was not on its port list\n",
1334 port
->slave
->dev
->master
->name
,
1335 port
->actor_port_number
, port
->slave
->dev
->name
,
1336 port
->aggregator
->aggregator_identifier
);
1339 // search on all aggregators for a suitable aggregator for this port
1340 for (aggregator
= __get_first_agg(port
); aggregator
;
1341 aggregator
= __get_next_agg(aggregator
)) {
1343 // keep a free aggregator for later use(if needed)
1344 if (!aggregator
->lag_ports
) {
1345 if (!free_aggregator
) {
1346 free_aggregator
=aggregator
;
1350 // check if current aggregator suits us
1351 if (((aggregator
->actor_oper_aggregator_key
== port
->actor_oper_port_key
) && // if all parameters match AND
1352 !MAC_ADDRESS_COMPARE(&(aggregator
->partner_system
), &(port
->partner_oper
.system
)) &&
1353 (aggregator
->partner_system_priority
== port
->partner_oper
.system_priority
) &&
1354 (aggregator
->partner_oper_aggregator_key
== port
->partner_oper
.key
)
1356 ((MAC_ADDRESS_COMPARE(&(port
->partner_oper
.system
), &(null_mac_addr
)) && // partner answers
1357 !aggregator
->is_individual
) // but is not individual OR
1360 // attach to the founded aggregator
1361 port
->aggregator
= aggregator
;
1362 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1363 port
->next_port_in_aggregator
=aggregator
->lag_ports
;
1364 port
->aggregator
->num_of_ports
++;
1365 aggregator
->lag_ports
=port
;
1366 pr_debug("Port %d joined LAG %d(existing LAG)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1368 // mark this port as selected
1369 port
->sm_vars
|= AD_PORT_SELECTED
;
1375 // the port couldn't find an aggregator - attach it to a new aggregator
1377 if (free_aggregator
) {
1378 // assign port a new aggregator
1379 port
->aggregator
= free_aggregator
;
1380 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1382 // update the new aggregator's parameters
1383 // if port was responsed from the end-user
1384 if (port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
) {// if port is full duplex
1385 port
->aggregator
->is_individual
= 0;
1387 port
->aggregator
->is_individual
= 1;
1390 port
->aggregator
->actor_admin_aggregator_key
= port
->actor_admin_port_key
;
1391 port
->aggregator
->actor_oper_aggregator_key
= port
->actor_oper_port_key
;
1392 port
->aggregator
->partner_system
=port
->partner_oper
.system
;
1393 port
->aggregator
->partner_system_priority
= port
->partner_oper
.system_priority
;
1394 port
->aggregator
->partner_oper_aggregator_key
= port
->partner_oper
.key
;
1395 port
->aggregator
->receive_state
= 1;
1396 port
->aggregator
->transmit_state
= 1;
1397 port
->aggregator
->lag_ports
= port
;
1398 port
->aggregator
->num_of_ports
++;
1400 // mark this port as selected
1401 port
->sm_vars
|= AD_PORT_SELECTED
;
1403 pr_debug("Port %d joined LAG %d(new LAG)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1405 printk(KERN_ERR DRV_NAME
": %s: Port %d (on %s) did not find a suitable aggregator\n",
1406 port
->slave
->dev
->master
->name
,
1407 port
->actor_port_number
, port
->slave
->dev
->name
);
1410 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1411 // else set ready=FALSE in all aggregator's ports
1412 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
1414 aggregator
= __get_first_agg(port
);
1415 ad_agg_selection_logic(aggregator
);
1419 * Decide if "agg" is a better choice for the new active aggregator that
1420 * the current best, according to the ad_select policy.
1422 static struct aggregator
*ad_agg_selection_test(struct aggregator
*best
,
1423 struct aggregator
*curr
)
1426 * 0. If no best, select current.
1428 * 1. If the current agg is not individual, and the best is
1429 * individual, select current.
1431 * 2. If current agg is individual and the best is not, keep best.
1433 * 3. Therefore, current and best are both individual or both not
1436 * 3a. If current agg partner replied, and best agg partner did not,
1439 * 3b. If current agg partner did not reply and best agg partner
1440 * did reply, keep best.
1442 * 4. Therefore, current and best both have partner replies or
1443 * both do not, so perform selection policy:
1445 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1446 * select by bandwidth.
1448 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1453 if (!curr
->is_individual
&& best
->is_individual
)
1456 if (curr
->is_individual
&& !best
->is_individual
)
1459 if (__agg_has_partner(curr
) && !__agg_has_partner(best
))
1462 if (!__agg_has_partner(curr
) && __agg_has_partner(best
))
1465 switch (__get_agg_selection_mode(curr
->lag_ports
)) {
1467 if (curr
->num_of_ports
> best
->num_of_ports
)
1470 if (curr
->num_of_ports
< best
->num_of_ports
)
1474 case BOND_AD_STABLE
:
1475 case BOND_AD_BANDWIDTH
:
1476 if (__get_agg_bandwidth(curr
) > __get_agg_bandwidth(best
))
1482 printk(KERN_WARNING DRV_NAME
1483 ": %s: Impossible agg select mode %d\n",
1484 curr
->slave
->dev
->master
->name
,
1485 __get_agg_selection_mode(curr
->lag_ports
));
1493 * ad_agg_selection_logic - select an aggregation group for a team
1494 * @aggregator: the aggregator we're looking at
1496 * It is assumed that only one aggregator may be selected for a team.
1498 * The logic of this function is to select the aggregator according to
1499 * the ad_select policy:
1501 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1502 * it, and to reselect the active aggregator only if the previous
1503 * aggregator has no more ports related to it.
1505 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1506 * bandwidth, and reselect whenever a link state change takes place or the
1507 * set of slaves in the bond changes.
1509 * BOND_AD_COUNT: select the aggregator with largest number of ports
1510 * (slaves), and reselect whenever a link state change takes place or the
1511 * set of slaves in the bond changes.
1513 * FIXME: this function MUST be called with the first agg in the bond, or
1514 * __get_active_agg() won't work correctly. This function should be better
1515 * called with the bond itself, and retrieve the first agg from it.
1517 static void ad_agg_selection_logic(struct aggregator
*agg
)
1519 struct aggregator
*best
, *active
, *origin
;
1524 active
= __get_active_agg(agg
);
1530 if (agg
->num_of_ports
)
1531 best
= ad_agg_selection_test(best
, agg
);
1533 } while ((agg
= __get_next_agg(agg
)));
1536 __get_agg_selection_mode(best
->lag_ports
) == BOND_AD_STABLE
) {
1538 * For the STABLE policy, don't replace the old active
1539 * aggregator if it's still active (it has an answering
1540 * partner) or if both the best and active don't have an
1541 * answering partner.
1543 if (active
&& active
->lag_ports
&&
1544 active
->lag_ports
->is_enabled
&&
1545 (__agg_has_partner(active
) ||
1546 (!__agg_has_partner(active
) && !__agg_has_partner(best
)))) {
1547 if (!(!active
->actor_oper_aggregator_key
&&
1548 best
->actor_oper_aggregator_key
)) {
1550 active
->is_active
= 1;
1555 if (best
&& (best
== active
)) {
1557 active
->is_active
= 1;
1560 // if there is new best aggregator, activate it
1562 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1563 best
->aggregator_identifier
, best
->num_of_ports
,
1564 best
->actor_oper_aggregator_key
,
1565 best
->partner_oper_aggregator_key
,
1566 best
->is_individual
, best
->is_active
);
1567 pr_debug("best ports %p slave %p %s\n",
1568 best
->lag_ports
, best
->slave
,
1569 best
->slave
? best
->slave
->dev
->name
: "NULL");
1571 for (agg
= __get_first_agg(best
->lag_ports
); agg
;
1572 agg
= __get_next_agg(agg
)) {
1574 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1575 agg
->aggregator_identifier
, agg
->num_of_ports
,
1576 agg
->actor_oper_aggregator_key
,
1577 agg
->partner_oper_aggregator_key
,
1578 agg
->is_individual
, agg
->is_active
);
1581 // check if any partner replys
1582 if (best
->is_individual
) {
1583 printk(KERN_WARNING DRV_NAME
": %s: Warning: No 802.3ad"
1584 " response from the link partner for any"
1585 " adapters in the bond\n",
1586 best
->slave
->dev
->master
->name
);
1589 best
->is_active
= 1;
1590 pr_debug("LAG %d chosen as the active LAG\n",
1591 best
->aggregator_identifier
);
1592 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1593 best
->aggregator_identifier
, best
->num_of_ports
,
1594 best
->actor_oper_aggregator_key
,
1595 best
->partner_oper_aggregator_key
,
1596 best
->is_individual
, best
->is_active
);
1598 // disable the ports that were related to the former active_aggregator
1600 for (port
= active
->lag_ports
; port
;
1601 port
= port
->next_port_in_aggregator
) {
1602 __disable_port(port
);
1608 * if the selected aggregator is of join individuals
1609 * (partner_system is NULL), enable their ports
1611 active
= __get_active_agg(origin
);
1614 if (!__agg_has_partner(active
)) {
1615 for (port
= active
->lag_ports
; port
;
1616 port
= port
->next_port_in_aggregator
) {
1617 __enable_port(port
);
1622 if (origin
->slave
) {
1623 struct bonding
*bond
;
1625 bond
= bond_get_bond_by_slave(origin
->slave
);
1627 bond_3ad_set_carrier(bond
);
1632 * ad_clear_agg - clear a given aggregator's parameters
1633 * @aggregator: the aggregator we're looking at
1636 static void ad_clear_agg(struct aggregator
*aggregator
)
1639 aggregator
->is_individual
= 0;
1640 aggregator
->actor_admin_aggregator_key
= 0;
1641 aggregator
->actor_oper_aggregator_key
= 0;
1642 aggregator
->partner_system
= null_mac_addr
;
1643 aggregator
->partner_system_priority
= 0;
1644 aggregator
->partner_oper_aggregator_key
= 0;
1645 aggregator
->receive_state
= 0;
1646 aggregator
->transmit_state
= 0;
1647 aggregator
->lag_ports
= NULL
;
1648 aggregator
->is_active
= 0;
1649 aggregator
->num_of_ports
= 0;
1650 pr_debug("LAG %d was cleared\n", aggregator
->aggregator_identifier
);
1655 * ad_initialize_agg - initialize a given aggregator's parameters
1656 * @aggregator: the aggregator we're looking at
1659 static void ad_initialize_agg(struct aggregator
*aggregator
)
1662 ad_clear_agg(aggregator
);
1664 aggregator
->aggregator_mac_address
= null_mac_addr
;
1665 aggregator
->aggregator_identifier
= 0;
1666 aggregator
->slave
= NULL
;
1671 * ad_initialize_port - initialize a given port's parameters
1672 * @aggregator: the aggregator we're looking at
1673 * @lacp_fast: boolean. whether fast periodic should be used
1676 static void ad_initialize_port(struct port
*port
, int lacp_fast
)
1679 port
->actor_port_number
= 1;
1680 port
->actor_port_priority
= 0xff;
1681 port
->actor_system
= null_mac_addr
;
1682 port
->actor_system_priority
= 0xffff;
1683 port
->actor_port_aggregator_identifier
= 0;
1685 port
->actor_admin_port_key
= 1;
1686 port
->actor_oper_port_key
= 1;
1687 port
->actor_admin_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1688 port
->actor_oper_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1691 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
1694 port
->partner_admin
.system
= null_mac_addr
;
1695 port
->partner_oper
.system
= null_mac_addr
;
1696 port
->partner_admin
.system_priority
= 0xffff;
1697 port
->partner_oper
.system_priority
= 0xffff;
1698 port
->partner_admin
.key
= 1;
1699 port
->partner_oper
.key
= 1;
1700 port
->partner_admin
.port_number
= 1;
1701 port
->partner_oper
.port_number
= 1;
1702 port
->partner_admin
.port_priority
= 0xff;
1703 port
->partner_oper
.port_priority
= 0xff;
1704 port
->partner_admin
.port_state
= 1;
1705 port
->partner_oper
.port_state
= 1;
1706 port
->is_enabled
= 1;
1707 // ****** private parameters ******
1708 port
->sm_vars
= 0x3;
1709 port
->sm_rx_state
= 0;
1710 port
->sm_rx_timer_counter
= 0;
1711 port
->sm_periodic_state
= 0;
1712 port
->sm_periodic_timer_counter
= 0;
1713 port
->sm_mux_state
= 0;
1714 port
->sm_mux_timer_counter
= 0;
1715 port
->sm_tx_state
= 0;
1716 port
->sm_tx_timer_counter
= 0;
1718 port
->aggregator
= NULL
;
1719 port
->next_port_in_aggregator
= NULL
;
1720 port
->transaction_id
= 0;
1722 ad_initialize_lacpdu(&(port
->lacpdu
));
1727 * ad_enable_collecting_distributing - enable a port's transmit/receive
1728 * @port: the port we're looking at
1730 * Enable @port if it's in an active aggregator
1732 static void ad_enable_collecting_distributing(struct port
*port
)
1734 if (port
->aggregator
->is_active
) {
1735 pr_debug("Enabling port %d(LAG %d)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1736 __enable_port(port
);
1741 * ad_disable_collecting_distributing - disable a port's transmit/receive
1742 * @port: the port we're looking at
1745 static void ad_disable_collecting_distributing(struct port
*port
)
1747 if (port
->aggregator
&& MAC_ADDRESS_COMPARE(&(port
->aggregator
->partner_system
), &(null_mac_addr
))) {
1748 pr_debug("Disabling port %d(LAG %d)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1749 __disable_port(port
);
1755 * ad_marker_info_send - send a marker information frame
1756 * @port: the port we're looking at
1758 * This function does nothing since we decided not to implement send and handle
1759 * response for marker PDU's, in this stage, but only to respond to marker
1762 static void ad_marker_info_send(struct port
*port
)
1764 struct bond_marker marker
;
1767 // fill the marker PDU with the appropriate values
1768 marker
.subtype
= 0x02;
1769 marker
.version_number
= 0x01;
1770 marker
.tlv_type
= AD_MARKER_INFORMATION_SUBTYPE
;
1771 marker
.marker_length
= 0x16;
1772 // convert requester_port to Big Endian
1773 marker
.requester_port
= (((port
->actor_port_number
& 0xFF) << 8) |((u16
)(port
->actor_port_number
& 0xFF00) >> 8));
1774 marker
.requester_system
= port
->actor_system
;
1775 // convert requester_port(u32) to Big Endian
1776 marker
.requester_transaction_id
= (((++port
->transaction_id
& 0xFF) << 24) |((port
->transaction_id
& 0xFF00) << 8) |((port
->transaction_id
& 0xFF0000) >> 8) |((port
->transaction_id
& 0xFF000000) >> 24));
1778 marker
.tlv_type_terminator
= 0x00;
1779 marker
.terminator_length
= 0x00;
1780 for (index
=0; index
<90; index
++) {
1781 marker
.reserved_90
[index
]=0;
1784 // send the marker information
1785 if (ad_marker_send(port
, &marker
) >= 0) {
1786 pr_debug("Sent Marker Information on port %d\n", port
->actor_port_number
);
1792 * ad_marker_info_received - handle receive of a Marker information frame
1793 * @marker_info: Marker info received
1794 * @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 //marker = *marker_info;
1804 memcpy(&marker
, marker_info
, sizeof(struct bond_marker
));
1805 // change the marker subtype to marker response
1806 marker
.tlv_type
=AD_MARKER_RESPONSE_SUBTYPE
;
1807 // send the marker response
1809 if (ad_marker_send(port
, &marker
) >= 0) {
1810 pr_debug("Sent Marker Response on port %d\n", 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
,
1826 marker
=NULL
; // just to satisfy the compiler
1827 port
=NULL
; // just to satisfy the compiler
1828 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1832 * ad_initialize_lacpdu - initialize a given lacpdu structure
1833 * @lacpdu: lacpdu structure to initialize
1836 static void ad_initialize_lacpdu(struct lacpdu
*lacpdu
)
1840 // initialize lacpdu data
1841 lacpdu
->subtype
= 0x01;
1842 lacpdu
->version_number
= 0x01;
1843 lacpdu
->tlv_type_actor_info
= 0x01;
1844 lacpdu
->actor_information_length
= 0x14;
1845 // lacpdu->actor_system_priority updated on send
1846 // lacpdu->actor_system updated on send
1847 // lacpdu->actor_key updated on send
1848 // lacpdu->actor_port_priority updated on send
1849 // lacpdu->actor_port updated on send
1850 // lacpdu->actor_state updated on send
1851 lacpdu
->tlv_type_partner_info
= 0x02;
1852 lacpdu
->partner_information_length
= 0x14;
1853 for (index
=0; index
<=2; index
++) {
1854 lacpdu
->reserved_3_1
[index
]=0;
1856 // lacpdu->partner_system_priority updated on send
1857 // lacpdu->partner_system updated on send
1858 // lacpdu->partner_key updated on send
1859 // lacpdu->partner_port_priority updated on send
1860 // lacpdu->partner_port updated on send
1861 // lacpdu->partner_state updated on send
1862 for (index
=0; index
<=2; index
++) {
1863 lacpdu
->reserved_3_2
[index
]=0;
1865 lacpdu
->tlv_type_collector_info
= 0x03;
1866 lacpdu
->collector_information_length
= 0x10;
1867 lacpdu
->collector_max_delay
= htons(AD_COLLECTOR_MAX_DELAY
);
1868 for (index
=0; index
<=11; index
++) {
1869 lacpdu
->reserved_12
[index
]=0;
1871 lacpdu
->tlv_type_terminator
= 0x00;
1872 lacpdu
->terminator_length
= 0;
1873 for (index
=0; index
<=49; index
++) {
1874 lacpdu
->reserved_50
[index
]=0;
1878 //////////////////////////////////////////////////////////////////////////////////////
1879 // ================= AD exported functions to the main bonding code ==================
1880 //////////////////////////////////////////////////////////////////////////////////////
1882 // Check aggregators status in team every T seconds
1883 #define AD_AGGREGATOR_SELECTION_TIMER 8
1886 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1888 * Set the aggregation selection timer, to initiate an agg selection in
1889 * the very near future. Called during first initialization, and during
1890 * any down to up transitions of the bond.
1892 void bond_3ad_initiate_agg_selection(struct bonding
*bond
, int timeout
)
1894 BOND_AD_INFO(bond
).agg_select_timer
= timeout
;
1895 BOND_AD_INFO(bond
).agg_select_mode
= bond
->params
.ad_select
;
1898 static u16 aggregator_identifier
;
1901 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1902 * @bond: bonding struct to work on
1903 * @tick_resolution: tick duration (millisecond resolution)
1904 * @lacp_fast: boolean. whether fast periodic should be used
1906 * Can be called only after the mac address of the bond is set.
1908 void bond_3ad_initialize(struct bonding
*bond
, u16 tick_resolution
, int lacp_fast
)
1910 // check that the bond is not initialized yet
1911 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond
).system
.sys_mac_addr
), &(bond
->dev
->dev_addr
))) {
1913 aggregator_identifier
= 0;
1915 BOND_AD_INFO(bond
).lacp_fast
= lacp_fast
;
1916 BOND_AD_INFO(bond
).system
.sys_priority
= 0xFFFF;
1917 BOND_AD_INFO(bond
).system
.sys_mac_addr
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1919 // initialize how many times this module is called in one 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 int bond_3ad_bind_slave(struct slave
*slave
)
1937 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1939 struct aggregator
*aggregator
;
1942 printk(KERN_ERR DRV_NAME
": %s: The slave %s is not attached to its bond\n",
1943 slave
->dev
->master
->name
, slave
->dev
->name
);
1947 //check that the slave has not been intialized yet.
1948 if (SLAVE_AD_INFO(slave
).port
.slave
!= slave
) {
1950 // port initialization
1951 port
= &(SLAVE_AD_INFO(slave
).port
);
1953 ad_initialize_port(port
, BOND_AD_INFO(bond
).lacp_fast
);
1955 port
->slave
= slave
;
1956 port
->actor_port_number
= SLAVE_AD_INFO(slave
).id
;
1957 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1958 // ------------------------------------------------------------
1959 // Port key : | User key | Speed |Duplex|
1960 // ------------------------------------------------------------
1962 port
->actor_admin_port_key
= 0; // initialize this parameter
1963 port
->actor_admin_port_key
|= __get_duplex(port
);
1964 port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
1965 port
->actor_oper_port_key
= port
->actor_admin_port_key
;
1966 // if the port is not full duplex, then the port should be not lacp Enabled
1967 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
)) {
1968 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1970 // actor system is the bond's system
1971 port
->actor_system
= BOND_AD_INFO(bond
).system
.sys_mac_addr
;
1972 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1973 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1974 port
->aggregator
= NULL
;
1975 port
->next_port_in_aggregator
= NULL
;
1977 __disable_port(port
);
1978 __initialize_port_locks(port
);
1981 // aggregator initialization
1982 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
1984 ad_initialize_agg(aggregator
);
1986 aggregator
->aggregator_mac_address
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1987 aggregator
->aggregator_identifier
= (++aggregator_identifier
);
1988 aggregator
->slave
= slave
;
1989 aggregator
->is_active
= 0;
1990 aggregator
->num_of_ports
= 0;
1997 * bond_3ad_unbind_slave - deinitialize a slave's port
1998 * @slave: slave struct to work on
2000 * Search for the aggregator that is related to this port, remove the
2001 * aggregator and assign another aggregator for other port related to it
2002 * (if any), and remove the port.
2004 void bond_3ad_unbind_slave(struct slave
*slave
)
2006 struct port
*port
, *prev_port
, *temp_port
;
2007 struct aggregator
*aggregator
, *new_aggregator
, *temp_aggregator
;
2008 int select_new_active_agg
= 0;
2010 // find the aggregator related to this slave
2011 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
2013 // find the port related to this slave
2014 port
= &(SLAVE_AD_INFO(slave
).port
);
2016 // if slave is null, the whole port is not initialized
2018 printk(KERN_WARNING DRV_NAME
": Warning: %s: Trying to "
2019 "unbind an uninitialized port on %s\n",
2020 slave
->dev
->master
->name
, slave
->dev
->name
);
2024 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator
->aggregator_identifier
);
2026 /* Tell the partner that this port is not suitable for aggregation */
2027 port
->actor_oper_port_state
&= ~AD_STATE_AGGREGATION
;
2028 __update_lacpdu_from_port(port
);
2029 ad_lacpdu_send(port
);
2031 // check if this aggregator is occupied
2032 if (aggregator
->lag_ports
) {
2033 // check if there are other ports related to this aggregator except
2034 // the port related to this slave(thats ensure us that there is a
2035 // reason to search for new aggregator, and that we will find one
2036 if ((aggregator
->lag_ports
!= port
) || (aggregator
->lag_ports
->next_port_in_aggregator
)) {
2037 // find new aggregator for the related port(s)
2038 new_aggregator
= __get_first_agg(port
);
2039 for (; new_aggregator
; new_aggregator
= __get_next_agg(new_aggregator
)) {
2040 // if the new aggregator is empty, or it connected to to our port only
2041 if (!new_aggregator
->lag_ports
|| ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
)) {
2045 // if new aggregator found, copy the aggregator's parameters
2046 // and connect the related lag_ports to the new aggregator
2047 if ((new_aggregator
) && ((!new_aggregator
->lag_ports
) || ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
))) {
2048 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator
->aggregator_identifier
, new_aggregator
->aggregator_identifier
);
2050 if ((new_aggregator
->lag_ports
== port
) && new_aggregator
->is_active
) {
2051 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2052 aggregator
->slave
->dev
->master
->name
);
2053 // select new active aggregator
2054 select_new_active_agg
= 1;
2057 new_aggregator
->is_individual
= aggregator
->is_individual
;
2058 new_aggregator
->actor_admin_aggregator_key
= aggregator
->actor_admin_aggregator_key
;
2059 new_aggregator
->actor_oper_aggregator_key
= aggregator
->actor_oper_aggregator_key
;
2060 new_aggregator
->partner_system
= aggregator
->partner_system
;
2061 new_aggregator
->partner_system_priority
= aggregator
->partner_system_priority
;
2062 new_aggregator
->partner_oper_aggregator_key
= aggregator
->partner_oper_aggregator_key
;
2063 new_aggregator
->receive_state
= aggregator
->receive_state
;
2064 new_aggregator
->transmit_state
= aggregator
->transmit_state
;
2065 new_aggregator
->lag_ports
= aggregator
->lag_ports
;
2066 new_aggregator
->is_active
= aggregator
->is_active
;
2067 new_aggregator
->num_of_ports
= aggregator
->num_of_ports
;
2069 // update the information that is written on the ports about the aggregator
2070 for (temp_port
=aggregator
->lag_ports
; temp_port
; temp_port
=temp_port
->next_port_in_aggregator
) {
2071 temp_port
->aggregator
=new_aggregator
;
2072 temp_port
->actor_port_aggregator_identifier
= new_aggregator
->aggregator_identifier
;
2075 // clear the aggregator
2076 ad_clear_agg(aggregator
);
2078 if (select_new_active_agg
) {
2079 ad_agg_selection_logic(__get_first_agg(port
));
2082 printk(KERN_WARNING DRV_NAME
": %s: Warning: unbinding aggregator, "
2083 "and could not find a new aggregator for its ports\n",
2084 slave
->dev
->master
->name
);
2086 } else { // in case that the only port related to this aggregator is the one we want to remove
2087 select_new_active_agg
= aggregator
->is_active
;
2088 // clear the aggregator
2089 ad_clear_agg(aggregator
);
2090 if (select_new_active_agg
) {
2091 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2092 slave
->dev
->master
->name
);
2093 // select new active aggregator
2094 ad_agg_selection_logic(__get_first_agg(port
));
2099 pr_debug("Unbinding port %d\n", port
->actor_port_number
);
2100 // find the aggregator that this port is connected to
2101 temp_aggregator
= __get_first_agg(port
);
2102 for (; temp_aggregator
; temp_aggregator
= __get_next_agg(temp_aggregator
)) {
2104 // search the port in the aggregator's related ports
2105 for (temp_port
=temp_aggregator
->lag_ports
; temp_port
; prev_port
=temp_port
, temp_port
=temp_port
->next_port_in_aggregator
) {
2106 if (temp_port
== port
) { // the aggregator found - detach the port from this aggregator
2108 prev_port
->next_port_in_aggregator
= temp_port
->next_port_in_aggregator
;
2110 temp_aggregator
->lag_ports
= temp_port
->next_port_in_aggregator
;
2112 temp_aggregator
->num_of_ports
--;
2113 if (temp_aggregator
->num_of_ports
==0) {
2114 select_new_active_agg
= temp_aggregator
->is_active
;
2115 // clear the aggregator
2116 ad_clear_agg(temp_aggregator
);
2117 if (select_new_active_agg
) {
2118 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2119 slave
->dev
->master
->name
);
2120 // select new active aggregator
2121 ad_agg_selection_logic(__get_first_agg(port
));
2132 * bond_3ad_state_machine_handler - handle state machines timeout
2133 * @bond: bonding struct to work on
2135 * The state machine handling concept in this module is to check every tick
2136 * which state machine should operate any function. The execution order is
2137 * round robin, so when we have an interaction between state machines, the
2138 * reply of one to each other might be delayed until next tick.
2140 * This function also complete the initialization when the agg_select_timer
2141 * times out, and it selects an aggregator for the ports that are yet not
2142 * related to any aggregator, and selects the active aggregator for a bond.
2144 void bond_3ad_state_machine_handler(struct work_struct
*work
)
2146 struct bonding
*bond
= container_of(work
, struct bonding
,
2149 struct aggregator
*aggregator
;
2151 read_lock(&bond
->lock
);
2153 if (bond
->kill_timers
) {
2157 //check if there are any slaves
2158 if (bond
->slave_cnt
== 0) {
2162 // check if agg_select_timer timer after initialize is timed out
2163 if (BOND_AD_INFO(bond
).agg_select_timer
&& !(--BOND_AD_INFO(bond
).agg_select_timer
)) {
2164 // select the active aggregator for the bond
2165 if ((port
= __get_first_port(bond
))) {
2167 printk(KERN_WARNING DRV_NAME
": %s: Warning: bond's first port is "
2168 "uninitialized\n", bond
->dev
->name
);
2172 aggregator
= __get_first_agg(port
);
2173 ad_agg_selection_logic(aggregator
);
2175 bond_3ad_set_carrier(bond
);
2178 // for each port run the state machines
2179 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2181 printk(KERN_WARNING DRV_NAME
": %s: Warning: Found an uninitialized "
2182 "port\n", bond
->dev
->name
);
2186 ad_rx_machine(NULL
, port
);
2187 ad_periodic_machine(port
);
2188 ad_port_selection_logic(port
);
2189 ad_mux_machine(port
);
2190 ad_tx_machine(port
);
2192 // turn off the BEGIN bit, since we already handled it
2193 if (port
->sm_vars
& AD_PORT_BEGIN
) {
2194 port
->sm_vars
&= ~AD_PORT_BEGIN
;
2199 queue_delayed_work(bond
->wq
, &bond
->ad_work
, ad_delta_in_ticks
);
2201 read_unlock(&bond
->lock
);
2205 * bond_3ad_rx_indication - handle a received frame
2206 * @lacpdu: received lacpdu
2207 * @slave: slave struct to work on
2208 * @length: length of the data received
2210 * It is assumed that frames that were sent on this NIC don't returned as new
2211 * received frames (loopback). Since only the payload is given to this
2212 * function, it check for loopback.
2214 static void bond_3ad_rx_indication(struct lacpdu
*lacpdu
, struct slave
*slave
, u16 length
)
2218 if (length
>= sizeof(struct lacpdu
)) {
2220 port
= &(SLAVE_AD_INFO(slave
).port
);
2223 printk(KERN_WARNING DRV_NAME
": %s: Warning: port of slave %s is "
2224 "uninitialized\n", slave
->dev
->name
, slave
->dev
->master
->name
);
2228 switch (lacpdu
->subtype
) {
2229 case AD_TYPE_LACPDU
:
2230 pr_debug("Received LACPDU on port %d\n", port
->actor_port_number
);
2231 ad_rx_machine(lacpdu
, port
);
2234 case AD_TYPE_MARKER
:
2235 // No need to convert fields to Little Endian since we don't use the marker's fields.
2237 switch (((struct bond_marker
*)lacpdu
)->tlv_type
) {
2238 case AD_MARKER_INFORMATION_SUBTYPE
:
2239 pr_debug("Received Marker Information on port %d\n", port
->actor_port_number
);
2240 ad_marker_info_received((struct bond_marker
*)lacpdu
, port
);
2243 case AD_MARKER_RESPONSE_SUBTYPE
:
2244 pr_debug("Received Marker Response on port %d\n", port
->actor_port_number
);
2245 ad_marker_response_received((struct bond_marker
*)lacpdu
, port
);
2249 pr_debug("Received an unknown Marker subtype on slot %d\n", port
->actor_port_number
);
2256 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2257 * @slave: slave struct to work on
2259 * Handle reselection of aggregator (if needed) for this port.
2261 void bond_3ad_adapter_speed_changed(struct slave
*slave
)
2265 port
= &(SLAVE_AD_INFO(slave
).port
);
2267 // if slave is null, the whole port is not initialized
2269 printk(KERN_WARNING DRV_NAME
": Warning: %s: speed "
2270 "changed for uninitialized port on %s\n",
2271 slave
->dev
->master
->name
, slave
->dev
->name
);
2275 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2276 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2277 pr_debug("Port %d changed speed\n", port
->actor_port_number
);
2278 // there is no need to reselect a new aggregator, just signal the
2279 // state machines to reinitialize
2280 port
->sm_vars
|= AD_PORT_BEGIN
;
2284 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2285 * @slave: slave struct to work on
2287 * Handle reselection of aggregator (if needed) for this port.
2289 void bond_3ad_adapter_duplex_changed(struct slave
*slave
)
2293 port
=&(SLAVE_AD_INFO(slave
).port
);
2295 // if slave is null, the whole port is not initialized
2297 printk(KERN_WARNING DRV_NAME
": %s: Warning: duplex changed "
2298 "for uninitialized port on %s\n",
2299 slave
->dev
->master
->name
, slave
->dev
->name
);
2303 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2304 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2305 pr_debug("Port %d changed duplex\n", port
->actor_port_number
);
2306 // there is no need to reselect a new aggregator, just signal the
2307 // state machines to reinitialize
2308 port
->sm_vars
|= AD_PORT_BEGIN
;
2312 * bond_3ad_handle_link_change - handle a slave's link status change indication
2313 * @slave: slave struct to work on
2314 * @status: whether the link is now up or down
2316 * Handle reselection of aggregator (if needed) for this port.
2318 void bond_3ad_handle_link_change(struct slave
*slave
, char link
)
2322 port
= &(SLAVE_AD_INFO(slave
).port
);
2324 // if slave is null, the whole port is not initialized
2326 printk(KERN_WARNING DRV_NAME
": Warning: %s: link status changed for "
2327 "uninitialized port on %s\n",
2328 slave
->dev
->master
->name
, slave
->dev
->name
);
2332 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
2333 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2334 if (link
== BOND_LINK_UP
) {
2335 port
->is_enabled
= 1;
2336 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2337 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2338 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2339 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2341 /* link has failed */
2342 port
->is_enabled
= 0;
2343 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2344 port
->actor_oper_port_key
= (port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
);
2346 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2347 // there is no need to reselect a new aggregator, just signal the
2348 // state machines to reinitialize
2349 port
->sm_vars
|= AD_PORT_BEGIN
;
2353 * set link state for bonding master: if we have an active
2354 * aggregator, we're up, if not, we're down. Presumes that we cannot
2355 * have an active aggregator if there are no slaves with link up.
2357 * This behavior complies with IEEE 802.3 section 43.3.9.
2359 * Called by bond_set_carrier(). Return zero if carrier state does not
2360 * change, nonzero if it does.
2362 int bond_3ad_set_carrier(struct bonding
*bond
)
2364 if (__get_active_agg(&(SLAVE_AD_INFO(bond
->first_slave
).aggregator
))) {
2365 if (!netif_carrier_ok(bond
->dev
)) {
2366 netif_carrier_on(bond
->dev
);
2372 if (netif_carrier_ok(bond
->dev
)) {
2373 netif_carrier_off(bond
->dev
);
2380 * bond_3ad_get_active_agg_info - get information of the active aggregator
2381 * @bond: bonding struct to work on
2382 * @ad_info: ad_info struct to fill with the bond's info
2384 * Returns: 0 on success
2387 int bond_3ad_get_active_agg_info(struct bonding
*bond
, struct ad_info
*ad_info
)
2389 struct aggregator
*aggregator
= NULL
;
2392 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2393 if (port
->aggregator
&& port
->aggregator
->is_active
) {
2394 aggregator
= port
->aggregator
;
2400 ad_info
->aggregator_id
= aggregator
->aggregator_identifier
;
2401 ad_info
->ports
= aggregator
->num_of_ports
;
2402 ad_info
->actor_key
= aggregator
->actor_oper_aggregator_key
;
2403 ad_info
->partner_key
= aggregator
->partner_oper_aggregator_key
;
2404 memcpy(ad_info
->partner_system
, aggregator
->partner_system
.mac_addr_value
, ETH_ALEN
);
2411 int bond_3ad_xmit_xor(struct sk_buff
*skb
, struct net_device
*dev
)
2413 struct slave
*slave
, *start_at
;
2414 struct bonding
*bond
= netdev_priv(dev
);
2419 struct ad_info ad_info
;
2422 /* make sure that the slaves list will
2423 * not change during tx
2425 read_lock(&bond
->lock
);
2427 if (!BOND_IS_OK(bond
)) {
2431 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
2432 printk(KERN_DEBUG DRV_NAME
": %s: Error: "
2433 "bond_3ad_get_active_agg_info failed\n", dev
->name
);
2437 slaves_in_agg
= ad_info
.ports
;
2438 agg_id
= ad_info
.aggregator_id
;
2440 if (slaves_in_agg
== 0) {
2441 /*the aggregator is empty*/
2442 printk(KERN_DEBUG DRV_NAME
": %s: Error: active "
2443 "aggregator is empty\n",
2448 slave_agg_no
= bond
->xmit_hash_policy(skb
, dev
, slaves_in_agg
);
2450 bond_for_each_slave(bond
, slave
, i
) {
2451 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2453 if (agg
&& (agg
->aggregator_identifier
== agg_id
)) {
2455 if (slave_agg_no
< 0) {
2461 if (slave_agg_no
>= 0) {
2462 printk(KERN_ERR DRV_NAME
": %s: Error: Couldn't find a slave to tx on "
2463 "for aggregator ID %d\n", dev
->name
, agg_id
);
2469 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
2470 int slave_agg_id
= 0;
2471 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2474 slave_agg_id
= agg
->aggregator_identifier
;
2477 if (SLAVE_IS_OK(slave
) && agg
&& (slave_agg_id
== agg_id
)) {
2478 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
2485 /* no suitable interface, frame not sent */
2488 read_unlock(&bond
->lock
);
2492 int bond_3ad_lacpdu_recv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
* ptype
, struct net_device
*orig_dev
)
2494 struct bonding
*bond
= netdev_priv(dev
);
2495 struct slave
*slave
= NULL
;
2496 int ret
= NET_RX_DROP
;
2498 if (dev_net(dev
) != &init_net
)
2501 if (!(dev
->flags
& IFF_MASTER
))
2504 read_lock(&bond
->lock
);
2505 slave
= bond_get_slave_by_dev((struct bonding
*)netdev_priv(dev
),
2510 bond_3ad_rx_indication((struct lacpdu
*) skb
->data
, slave
, skb
->len
);
2512 ret
= NET_RX_SUCCESS
;
2515 read_unlock(&bond
->lock
);