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 // validate lacpdu and port
487 if (lacpdu
&& port
) {
488 // record the new parameter values for the partner operational
489 port
->partner_oper_port_number
= ntohs(lacpdu
->actor_port
);
490 port
->partner_oper_port_priority
= ntohs(lacpdu
->actor_port_priority
);
491 port
->partner_oper_system
= lacpdu
->actor_system
;
492 port
->partner_oper_system_priority
= ntohs(lacpdu
->actor_system_priority
);
493 port
->partner_oper_key
= ntohs(lacpdu
->actor_key
);
494 // zero partener's lase states
495 port
->partner_oper_port_state
= 0;
496 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_LACP_ACTIVITY
);
497 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_LACP_TIMEOUT
);
498 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_AGGREGATION
);
499 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_SYNCHRONIZATION
);
500 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_COLLECTING
);
501 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_DISTRIBUTING
);
502 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_DEFAULTED
);
503 port
->partner_oper_port_state
|= (lacpdu
->actor_state
& AD_STATE_EXPIRED
);
505 // set actor_oper_port_state.defaulted to FALSE
506 port
->actor_oper_port_state
&= ~AD_STATE_DEFAULTED
;
508 // set the partner sync. to on if the partner is sync. and the port is matched
509 if ((port
->sm_vars
& AD_PORT_MATCHED
) && (lacpdu
->actor_state
& AD_STATE_SYNCHRONIZATION
)) {
510 port
->partner_oper_port_state
|= AD_STATE_SYNCHRONIZATION
;
512 port
->partner_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
518 * __record_default - record default parameters
519 * @port: the port we're looking at
521 * This function records the default parameter values for the partner carried
522 * in the Partner Admin parameters as the current partner operational parameter
523 * values and sets actor_oper_port_state.defaulted to TRUE.
525 static void __record_default(struct port
*port
)
529 // record the partner admin parameters
530 port
->partner_oper_port_number
= port
->partner_admin_port_number
;
531 port
->partner_oper_port_priority
= port
->partner_admin_port_priority
;
532 port
->partner_oper_system
= port
->partner_admin_system
;
533 port
->partner_oper_system_priority
= port
->partner_admin_system_priority
;
534 port
->partner_oper_key
= port
->partner_admin_key
;
535 port
->partner_oper_port_state
= port
->partner_admin_port_state
;
537 // set actor_oper_port_state.defaulted to true
538 port
->actor_oper_port_state
|= AD_STATE_DEFAULTED
;
543 * __update_selected - update a port's Selected variable from a received lacpdu
544 * @lacpdu: the lacpdu we've received
545 * @port: the port we're looking at
547 * Update the value of the selected variable, using parameter values from a
548 * newly received lacpdu. The parameter values for the Actor carried in the
549 * received PDU are compared with the corresponding operational parameter
550 * values for the ports partner. If one or more of the comparisons shows that
551 * the value(s) received in the PDU differ from the current operational values,
552 * then selected is set to FALSE and actor_oper_port_state.synchronization is
553 * set to out_of_sync. Otherwise, selected remains unchanged.
555 static void __update_selected(struct lacpdu
*lacpdu
, struct port
*port
)
557 // validate lacpdu and port
558 if (lacpdu
&& port
) {
559 // check if any parameter is different
560 if ((ntohs(lacpdu
->actor_port
) != port
->partner_oper_port_number
) ||
561 (ntohs(lacpdu
->actor_port_priority
) != port
->partner_oper_port_priority
) ||
562 MAC_ADDRESS_COMPARE(&(lacpdu
->actor_system
), &(port
->partner_oper_system
)) ||
563 (ntohs(lacpdu
->actor_system_priority
) != port
->partner_oper_system_priority
) ||
564 (ntohs(lacpdu
->actor_key
) != port
->partner_oper_key
) ||
565 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) != (port
->partner_oper_port_state
& AD_STATE_AGGREGATION
))
567 // update the state machine Selected variable
568 port
->sm_vars
&= ~AD_PORT_SELECTED
;
574 * __update_default_selected - update a port's Selected variable from Partner
575 * @port: the port we're looking at
577 * This function updates the value of the selected variable, using the partner
578 * administrative parameter values. The administrative values are compared with
579 * the corresponding operational parameter values for the partner. If one or
580 * more of the comparisons shows that the administrative value(s) differ from
581 * the current operational values, then Selected is set to FALSE and
582 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
583 * Selected remains unchanged.
585 static void __update_default_selected(struct port
*port
)
589 // check if any parameter is different
590 if ((port
->partner_admin_port_number
!= port
->partner_oper_port_number
) ||
591 (port
->partner_admin_port_priority
!= port
->partner_oper_port_priority
) ||
592 MAC_ADDRESS_COMPARE(&(port
->partner_admin_system
), &(port
->partner_oper_system
)) ||
593 (port
->partner_admin_system_priority
!= port
->partner_oper_system_priority
) ||
594 (port
->partner_admin_key
!= port
->partner_oper_key
) ||
595 ((port
->partner_admin_port_state
& AD_STATE_AGGREGATION
) != (port
->partner_oper_port_state
& AD_STATE_AGGREGATION
))
597 // update the state machine Selected variable
598 port
->sm_vars
&= ~AD_PORT_SELECTED
;
604 * __choose_matched - update a port's matched variable from a received lacpdu
605 * @lacpdu: the lacpdu we've received
606 * @port: the port we're looking at
608 * Update the value of the matched variable, using parameter values from a
609 * newly received lacpdu. Parameter values for the partner carried in the
610 * received PDU are compared with the corresponding operational parameter
611 * values for the actor. Matched is set to TRUE if all of these parameters
612 * match and the PDU parameter partner_state.aggregation has the same value as
613 * actor_oper_port_state.aggregation and lacp will actively maintain the link
614 * in the aggregation. Matched is also set to TRUE if the value of
615 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
616 * an individual link and lacp will actively maintain the link. Otherwise,
617 * matched is set to FALSE. LACP is considered to be actively maintaining the
618 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
619 * the actor's actor_oper_port_state.lacp_activity and the PDU's
620 * partner_state.lacp_activity variables are TRUE.
622 static void __choose_matched(struct lacpdu
*lacpdu
, struct port
*port
)
624 // validate lacpdu and port
625 if (lacpdu
&& port
) {
626 // check if all parameters are alike
627 if (((ntohs(lacpdu
->partner_port
) == port
->actor_port_number
) &&
628 (ntohs(lacpdu
->partner_port_priority
) == port
->actor_port_priority
) &&
629 !MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) &&
630 (ntohs(lacpdu
->partner_system_priority
) == port
->actor_system_priority
) &&
631 (ntohs(lacpdu
->partner_key
) == port
->actor_oper_port_key
) &&
632 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) == (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))) ||
633 // or this is individual link(aggregation == FALSE)
634 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) == 0)
636 // update the state machine Matched variable
637 port
->sm_vars
|= AD_PORT_MATCHED
;
639 port
->sm_vars
&= ~AD_PORT_MATCHED
;
645 * __update_ntt - update a port's ntt variable from a received lacpdu
646 * @lacpdu: the lacpdu we've received
647 * @port: the port we're looking at
649 * Updates the value of the ntt variable, using parameter values from a newly
650 * received lacpdu. The parameter values for the partner carried in the
651 * received PDU are compared with the corresponding operational parameter
652 * values for the Actor. If one or more of the comparisons shows that the
653 * value(s) received in the PDU differ from the current operational values,
654 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
656 static void __update_ntt(struct lacpdu
*lacpdu
, struct port
*port
)
658 // validate lacpdu and port
659 if (lacpdu
&& port
) {
660 // check if any parameter is different
661 if ((ntohs(lacpdu
->partner_port
) != port
->actor_port_number
) ||
662 (ntohs(lacpdu
->partner_port_priority
) != port
->actor_port_priority
) ||
663 MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) ||
664 (ntohs(lacpdu
->partner_system_priority
) != port
->actor_system_priority
) ||
665 (ntohs(lacpdu
->partner_key
) != port
->actor_oper_port_key
) ||
666 ((lacpdu
->partner_state
& AD_STATE_LACP_ACTIVITY
) != (port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
)) ||
667 ((lacpdu
->partner_state
& AD_STATE_LACP_TIMEOUT
) != (port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) ||
668 ((lacpdu
->partner_state
& AD_STATE_SYNCHRONIZATION
) != (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) ||
669 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) != (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))
671 // set ntt to be TRUE
678 * __attach_bond_to_agg
679 * @port: the port we're looking at
681 * Handle the attaching of the port's control parser/multiplexer and the
682 * aggregator. This function does nothing since the parser/multiplexer of the
683 * receive and the parser/multiplexer of the aggregator are already combined.
685 static void __attach_bond_to_agg(struct port
*port
)
687 port
=NULL
; // just to satisfy the compiler
688 // This function does nothing since the parser/multiplexer of the receive
689 // and the parser/multiplexer of the aggregator are already combined
693 * __detach_bond_from_agg
694 * @port: the port we're looking at
696 * Handle the detaching of the port's control parser/multiplexer from the
697 * aggregator. This function does nothing since the parser/multiplexer of the
698 * receive and the parser/multiplexer of the aggregator are already combined.
700 static void __detach_bond_from_agg(struct port
*port
)
702 port
=NULL
; // just to satisfy the compiler
703 // This function does nothing sience the parser/multiplexer of the receive
704 // and the parser/multiplexer of the aggregator are already combined
708 * __agg_ports_are_ready - check if all ports in an aggregator are ready
709 * @aggregator: the aggregator we're looking at
712 static int __agg_ports_are_ready(struct aggregator
*aggregator
)
718 // scan all ports in this aggregator to verfy if they are all ready
719 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
720 if (!(port
->sm_vars
& AD_PORT_READY_N
)) {
731 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
732 * @aggregator: the aggregator we're looking at
733 * @val: Should the ports' ready bit be set on or off
736 static void __set_agg_ports_ready(struct aggregator
*aggregator
, int val
)
740 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
742 port
->sm_vars
|= AD_PORT_READY
;
744 port
->sm_vars
&= ~AD_PORT_READY
;
750 * __get_agg_bandwidth - get the total bandwidth of an aggregator
751 * @aggregator: the aggregator we're looking at
754 static u32
__get_agg_bandwidth(struct aggregator
*aggregator
)
759 if (aggregator
->num_of_ports
) {
760 basic_speed
= __get_link_speed(aggregator
->lag_ports
);
761 switch (basic_speed
) {
762 case AD_LINK_SPEED_BITMASK_1MBPS
:
763 bandwidth
= aggregator
->num_of_ports
;
765 case AD_LINK_SPEED_BITMASK_10MBPS
:
766 bandwidth
= aggregator
->num_of_ports
* 10;
768 case AD_LINK_SPEED_BITMASK_100MBPS
:
769 bandwidth
= aggregator
->num_of_ports
* 100;
771 case AD_LINK_SPEED_BITMASK_1000MBPS
:
772 bandwidth
= aggregator
->num_of_ports
* 1000;
774 case AD_LINK_SPEED_BITMASK_10000MBPS
:
775 bandwidth
= aggregator
->num_of_ports
* 10000;
778 bandwidth
=0; // to silent the compilor ....
785 * __get_active_agg - get the current active aggregator
786 * @aggregator: the aggregator we're looking at
789 static struct aggregator
*__get_active_agg(struct aggregator
*aggregator
)
791 struct aggregator
*retval
= NULL
;
793 for (; aggregator
; aggregator
= __get_next_agg(aggregator
)) {
794 if (aggregator
->is_active
) {
804 * __update_lacpdu_from_port - update a port's lacpdu fields
805 * @port: the port we're looking at
808 static inline void __update_lacpdu_from_port(struct port
*port
)
810 struct lacpdu
*lacpdu
= &port
->lacpdu
;
812 /* update current actual Actor parameters */
813 /* lacpdu->subtype initialized
814 * lacpdu->version_number initialized
815 * lacpdu->tlv_type_actor_info initialized
816 * lacpdu->actor_information_length initialized
819 lacpdu
->actor_system_priority
= htons(port
->actor_system_priority
);
820 lacpdu
->actor_system
= port
->actor_system
;
821 lacpdu
->actor_key
= htons(port
->actor_oper_port_key
);
822 lacpdu
->actor_port_priority
= htons(port
->actor_port_priority
);
823 lacpdu
->actor_port
= htons(port
->actor_port_number
);
824 lacpdu
->actor_state
= port
->actor_oper_port_state
;
826 /* lacpdu->reserved_3_1 initialized
827 * lacpdu->tlv_type_partner_info initialized
828 * lacpdu->partner_information_length initialized
831 lacpdu
->partner_system_priority
= htons(port
->partner_oper_system_priority
);
832 lacpdu
->partner_system
= port
->partner_oper_system
;
833 lacpdu
->partner_key
= htons(port
->partner_oper_key
);
834 lacpdu
->partner_port_priority
= htons(port
->partner_oper_port_priority
);
835 lacpdu
->partner_port
= htons(port
->partner_oper_port_number
);
836 lacpdu
->partner_state
= port
->partner_oper_port_state
;
838 /* lacpdu->reserved_3_2 initialized
839 * lacpdu->tlv_type_collector_info initialized
840 * lacpdu->collector_information_length initialized
841 * collector_max_delay initialized
842 * reserved_12[12] initialized
843 * tlv_type_terminator initialized
844 * terminator_length initialized
845 * reserved_50[50] initialized
849 //////////////////////////////////////////////////////////////////////////////////////
850 // ================= main 802.3ad protocol code ======================================
851 //////////////////////////////////////////////////////////////////////////////////////
854 * ad_lacpdu_send - send out a lacpdu packet on a given port
855 * @port: the port we're looking at
857 * Returns: 0 on success
860 static int ad_lacpdu_send(struct port
*port
)
862 struct slave
*slave
= port
->slave
;
864 struct lacpdu_header
*lacpdu_header
;
865 int length
= sizeof(struct lacpdu_header
);
866 struct mac_addr lacpdu_multicast_address
= AD_MULTICAST_LACPDU_ADDR
;
868 skb
= dev_alloc_skb(length
);
873 skb
->dev
= slave
->dev
;
874 skb_reset_mac_header(skb
);
875 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
876 skb
->protocol
= PKT_TYPE_LACPDU
;
877 skb
->priority
= TC_PRIO_CONTROL
;
879 lacpdu_header
= (struct lacpdu_header
*)skb_put(skb
, length
);
881 lacpdu_header
->ad_header
.destination_address
= lacpdu_multicast_address
;
882 /* Note: source addres is set to be the member's PERMANENT address, because we use it
883 to identify loopback lacpdus in receive. */
884 lacpdu_header
->ad_header
.source_address
= *((struct mac_addr
*)(slave
->perm_hwaddr
));
885 lacpdu_header
->ad_header
.length_type
= PKT_TYPE_LACPDU
;
887 lacpdu_header
->lacpdu
= port
->lacpdu
; // struct copy
895 * ad_marker_send - send marker information/response on a given port
896 * @port: the port we're looking at
897 * @marker: marker data to send
899 * Returns: 0 on success
902 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
)
904 struct slave
*slave
= port
->slave
;
906 struct bond_marker_header
*marker_header
;
907 int length
= sizeof(struct bond_marker_header
);
908 struct mac_addr lacpdu_multicast_address
= AD_MULTICAST_LACPDU_ADDR
;
910 skb
= dev_alloc_skb(length
+ 16);
915 skb_reserve(skb
, 16);
917 skb
->dev
= slave
->dev
;
918 skb_reset_mac_header(skb
);
919 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
920 skb
->protocol
= PKT_TYPE_LACPDU
;
922 marker_header
= (struct bond_marker_header
*)skb_put(skb
, length
);
924 marker_header
->ad_header
.destination_address
= lacpdu_multicast_address
;
925 /* Note: source addres is set to be the member's PERMANENT address, because we use it
926 to identify loopback MARKERs in receive. */
927 marker_header
->ad_header
.source_address
= *((struct mac_addr
*)(slave
->perm_hwaddr
));
928 marker_header
->ad_header
.length_type
= PKT_TYPE_LACPDU
;
930 marker_header
->marker
= *marker
; // struct copy
938 * ad_mux_machine - handle a port's mux state machine
939 * @port: the port we're looking at
942 static void ad_mux_machine(struct port
*port
)
944 mux_states_t last_state
;
946 // keep current State Machine state to compare later if it was changed
947 last_state
= port
->sm_mux_state
;
949 if (port
->sm_vars
& AD_PORT_BEGIN
) {
950 port
->sm_mux_state
= AD_MUX_DETACHED
; // next state
952 switch (port
->sm_mux_state
) {
953 case AD_MUX_DETACHED
:
954 if ((port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
)) { // if SELECTED or STANDBY
955 port
->sm_mux_state
= AD_MUX_WAITING
; // next state
959 // if SELECTED == FALSE return to DETACH state
960 if (!(port
->sm_vars
& AD_PORT_SELECTED
)) { // if UNSELECTED
961 port
->sm_vars
&= ~AD_PORT_READY_N
;
962 // in order to withhold the Selection Logic to check all ports READY_N value
963 // every callback cycle to update ready variable, we check READY_N and update READY here
964 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
965 port
->sm_mux_state
= AD_MUX_DETACHED
; // next state
969 // check if the wait_while_timer expired
970 if (port
->sm_mux_timer_counter
&& !(--port
->sm_mux_timer_counter
)) {
971 port
->sm_vars
|= AD_PORT_READY_N
;
974 // in order to withhold the selection logic to check all ports READY_N value
975 // every callback cycle to update ready variable, we check READY_N and update READY here
976 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
978 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
979 if ((port
->sm_vars
& AD_PORT_READY
) && !port
->sm_mux_timer_counter
) {
980 port
->sm_mux_state
= AD_MUX_ATTACHED
; // next state
983 case AD_MUX_ATTACHED
:
984 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
985 if ((port
->sm_vars
& AD_PORT_SELECTED
) && (port
->partner_oper_port_state
& AD_STATE_SYNCHRONIZATION
) && !__check_agg_selection_timer(port
)) {
986 port
->sm_mux_state
= AD_MUX_COLLECTING_DISTRIBUTING
;// next state
987 } else if (!(port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
)) { // if UNSELECTED or STANDBY
988 port
->sm_vars
&= ~AD_PORT_READY_N
;
989 // in order to withhold the selection logic to check all ports READY_N value
990 // every callback cycle to update ready variable, we check READY_N and update READY here
991 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
992 port
->sm_mux_state
= AD_MUX_DETACHED
;// next state
995 case AD_MUX_COLLECTING_DISTRIBUTING
:
996 if (!(port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
) ||
997 !(port
->partner_oper_port_state
& AD_STATE_SYNCHRONIZATION
)
999 port
->sm_mux_state
= AD_MUX_ATTACHED
;// next state
1002 // if port state hasn't changed make
1003 // sure that a collecting distributing
1004 // port in an active aggregator is enabled
1005 if (port
->aggregator
&&
1006 port
->aggregator
->is_active
&&
1007 !__port_is_enabled(port
)) {
1009 __enable_port(port
);
1013 default: //to silence the compiler
1018 // check if the state machine was changed
1019 if (port
->sm_mux_state
!= last_state
) {
1020 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port
->actor_port_number
, last_state
, port
->sm_mux_state
);
1021 switch (port
->sm_mux_state
) {
1022 case AD_MUX_DETACHED
:
1023 __detach_bond_from_agg(port
);
1024 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1025 ad_disable_collecting_distributing(port
);
1026 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
1027 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
1030 case AD_MUX_WAITING
:
1031 port
->sm_mux_timer_counter
= __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER
, 0);
1033 case AD_MUX_ATTACHED
:
1034 __attach_bond_to_agg(port
);
1035 port
->actor_oper_port_state
|= AD_STATE_SYNCHRONIZATION
;
1036 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
1037 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
1038 ad_disable_collecting_distributing(port
);
1041 case AD_MUX_COLLECTING_DISTRIBUTING
:
1042 port
->actor_oper_port_state
|= AD_STATE_COLLECTING
;
1043 port
->actor_oper_port_state
|= AD_STATE_DISTRIBUTING
;
1044 ad_enable_collecting_distributing(port
);
1047 default: //to silence the compiler
1054 * ad_rx_machine - handle a port's rx State Machine
1055 * @lacpdu: the lacpdu we've received
1056 * @port: the port we're looking at
1058 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1059 * CURRENT. If timer expired set the state machine in the proper state.
1060 * In other cases, this function checks if we need to switch to other state.
1062 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
)
1064 rx_states_t last_state
;
1066 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1067 __get_rx_machine_lock(port
);
1069 // keep current State Machine state to compare later if it was changed
1070 last_state
= port
->sm_rx_state
;
1072 // check if state machine should change state
1073 // first, check if port was reinitialized
1074 if (port
->sm_vars
& AD_PORT_BEGIN
) {
1075 port
->sm_rx_state
= AD_RX_INITIALIZE
; // next state
1077 // check if port is not enabled
1078 else if (!(port
->sm_vars
& AD_PORT_BEGIN
) && !port
->is_enabled
&& !(port
->sm_vars
& AD_PORT_MOVED
)) {
1079 port
->sm_rx_state
= AD_RX_PORT_DISABLED
; // next state
1081 // check if new lacpdu arrived
1082 else if (lacpdu
&& ((port
->sm_rx_state
== AD_RX_EXPIRED
) || (port
->sm_rx_state
== AD_RX_DEFAULTED
) || (port
->sm_rx_state
== AD_RX_CURRENT
))) {
1083 port
->sm_rx_timer_counter
= 0; // zero timer
1084 port
->sm_rx_state
= AD_RX_CURRENT
;
1086 // if timer is on, and if it is expired
1087 if (port
->sm_rx_timer_counter
&& !(--port
->sm_rx_timer_counter
)) {
1088 switch (port
->sm_rx_state
) {
1090 port
->sm_rx_state
= AD_RX_DEFAULTED
; // next state
1093 port
->sm_rx_state
= AD_RX_EXPIRED
; // next state
1095 default: //to silence the compiler
1099 // if no lacpdu arrived and no timer is on
1100 switch (port
->sm_rx_state
) {
1101 case AD_RX_PORT_DISABLED
:
1102 if (port
->sm_vars
& AD_PORT_MOVED
) {
1103 port
->sm_rx_state
= AD_RX_INITIALIZE
; // next state
1104 } else if (port
->is_enabled
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1105 port
->sm_rx_state
= AD_RX_EXPIRED
; // next state
1106 } else if (port
->is_enabled
&& ((port
->sm_vars
& AD_PORT_LACP_ENABLED
) == 0)) {
1107 port
->sm_rx_state
= AD_RX_LACP_DISABLED
; // next state
1110 default: //to silence the compiler
1117 // check if the State machine was changed or new lacpdu arrived
1118 if ((port
->sm_rx_state
!= last_state
) || (lacpdu
)) {
1119 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port
->actor_port_number
, last_state
, port
->sm_rx_state
);
1120 switch (port
->sm_rx_state
) {
1121 case AD_RX_INITIALIZE
:
1122 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
)) {
1123 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1125 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
1127 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1128 __record_default(port
);
1129 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1130 port
->sm_vars
&= ~AD_PORT_MOVED
;
1131 port
->sm_rx_state
= AD_RX_PORT_DISABLED
; // next state
1133 /*- Fall Through -*/
1135 case AD_RX_PORT_DISABLED
:
1136 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1138 case AD_RX_LACP_DISABLED
:
1139 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1140 __record_default(port
);
1141 port
->partner_oper_port_state
&= ~AD_STATE_AGGREGATION
;
1142 port
->sm_vars
|= AD_PORT_MATCHED
;
1143 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1146 //Reset of the Synchronization flag. (Standard 43.4.12)
1147 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1148 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1149 port
->partner_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1150 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1151 port
->partner_oper_port_state
|= AD_SHORT_TIMEOUT
;
1152 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(AD_SHORT_TIMEOUT
));
1153 port
->actor_oper_port_state
|= AD_STATE_EXPIRED
;
1155 case AD_RX_DEFAULTED
:
1156 __update_default_selected(port
);
1157 __record_default(port
);
1158 port
->sm_vars
|= AD_PORT_MATCHED
;
1159 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1162 // detect loopback situation
1163 if (!MAC_ADDRESS_COMPARE(&(lacpdu
->actor_system
), &(port
->actor_system
))) {
1164 // INFO_RECEIVED_LOOPBACK_FRAMES
1165 printk(KERN_ERR DRV_NAME
": %s: An illegal loopback occurred on "
1166 "adapter (%s). Check the configuration to verify that all "
1167 "Adapters are connected to 802.3ad compliant switch ports\n",
1168 port
->slave
->dev
->master
->name
, port
->slave
->dev
->name
);
1169 __release_rx_machine_lock(port
);
1172 __update_selected(lacpdu
, port
);
1173 __update_ntt(lacpdu
, port
);
1174 __record_pdu(lacpdu
, port
);
1175 __choose_matched(lacpdu
, port
);
1176 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
));
1177 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1178 // verify that if the aggregator is enabled, the port is enabled too.
1179 //(because if the link goes down for a short time, the 802.3ad will not
1180 // catch it, and the port will continue to be disabled)
1181 if (port
->aggregator
&& port
->aggregator
->is_active
&& !__port_is_enabled(port
)) {
1182 __enable_port(port
);
1185 default: //to silence the compiler
1189 __release_rx_machine_lock(port
);
1193 * ad_tx_machine - handle a port's tx state machine
1194 * @port: the port we're looking at
1197 static void ad_tx_machine(struct port
*port
)
1199 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1200 if (port
->sm_tx_timer_counter
&& !(--port
->sm_tx_timer_counter
)) {
1201 // check if there is something to send
1202 if (port
->ntt
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1203 __update_lacpdu_from_port(port
);
1205 if (ad_lacpdu_send(port
) >= 0) {
1206 pr_debug("Sent LACPDU on port %d\n", port
->actor_port_number
);
1207 // mark ntt as false, so it will not be sent again until demanded
1211 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1212 port
->sm_tx_timer_counter
=ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1217 * ad_periodic_machine - handle a port's periodic state machine
1218 * @port: the port we're looking at
1220 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1222 static void ad_periodic_machine(struct port
*port
)
1224 periodic_states_t last_state
;
1226 // keep current state machine state to compare later if it was changed
1227 last_state
= port
->sm_periodic_state
;
1229 // check if port was reinitialized
1230 if (((port
->sm_vars
& AD_PORT_BEGIN
) || !(port
->sm_vars
& AD_PORT_LACP_ENABLED
) || !port
->is_enabled
) ||
1231 (!(port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
) && !(port
->partner_oper_port_state
& AD_STATE_LACP_ACTIVITY
))
1233 port
->sm_periodic_state
= AD_NO_PERIODIC
; // next state
1235 // check if state machine should change state
1236 else if (port
->sm_periodic_timer_counter
) {
1237 // check if periodic state machine expired
1238 if (!(--port
->sm_periodic_timer_counter
)) {
1239 // if expired then do tx
1240 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1242 // If not expired, check if there is some new timeout parameter from the partner state
1243 switch (port
->sm_periodic_state
) {
1244 case AD_FAST_PERIODIC
:
1245 if (!(port
->partner_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) {
1246 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1249 case AD_SLOW_PERIODIC
:
1250 if ((port
->partner_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) {
1251 // stop current timer
1252 port
->sm_periodic_timer_counter
= 0;
1253 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1256 default: //to silence the compiler
1261 switch (port
->sm_periodic_state
) {
1262 case AD_NO_PERIODIC
:
1263 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1265 case AD_PERIODIC_TX
:
1266 if (!(port
->partner_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) {
1267 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1269 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1272 default: //to silence the compiler
1277 // check if the state machine was changed
1278 if (port
->sm_periodic_state
!= last_state
) {
1279 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port
->actor_port_number
, last_state
, port
->sm_periodic_state
);
1280 switch (port
->sm_periodic_state
) {
1281 case AD_NO_PERIODIC
:
1282 port
->sm_periodic_timer_counter
= 0; // zero timer
1284 case AD_FAST_PERIODIC
:
1285 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
1287 case AD_SLOW_PERIODIC
:
1288 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
1290 case AD_PERIODIC_TX
:
1293 default: //to silence the compiler
1300 * ad_port_selection_logic - select aggregation groups
1301 * @port: the port we're looking at
1303 * Select aggregation groups, and assign each port for it's aggregetor. The
1304 * selection logic is called in the inititalization (after all the handshkes),
1305 * and after every lacpdu receive (if selected is off).
1307 static void ad_port_selection_logic(struct port
*port
)
1309 struct aggregator
*aggregator
, *free_aggregator
= NULL
, *temp_aggregator
;
1310 struct port
*last_port
= NULL
, *curr_port
;
1313 // if the port is already Selected, do nothing
1314 if (port
->sm_vars
& AD_PORT_SELECTED
) {
1318 // if the port is connected to other aggregator, detach it
1319 if (port
->aggregator
) {
1320 // detach the port from its former aggregator
1321 temp_aggregator
=port
->aggregator
;
1322 for (curr_port
=temp_aggregator
->lag_ports
; curr_port
; last_port
=curr_port
, curr_port
=curr_port
->next_port_in_aggregator
) {
1323 if (curr_port
== port
) {
1324 temp_aggregator
->num_of_ports
--;
1325 if (!last_port
) {// if it is the first port attached to the aggregator
1326 temp_aggregator
->lag_ports
=port
->next_port_in_aggregator
;
1327 } else {// not the first port attached to the aggregator
1328 last_port
->next_port_in_aggregator
=port
->next_port_in_aggregator
;
1331 // clear the port's relations to this aggregator
1332 port
->aggregator
= NULL
;
1333 port
->next_port_in_aggregator
=NULL
;
1334 port
->actor_port_aggregator_identifier
=0;
1336 pr_debug("Port %d left LAG %d\n", port
->actor_port_number
, temp_aggregator
->aggregator_identifier
);
1337 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1338 if (!temp_aggregator
->lag_ports
) {
1339 ad_clear_agg(temp_aggregator
);
1344 if (!curr_port
) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1345 printk(KERN_WARNING DRV_NAME
": %s: Warning: Port %d (on %s) was "
1346 "related to aggregator %d but was not on its port list\n",
1347 port
->slave
->dev
->master
->name
,
1348 port
->actor_port_number
, port
->slave
->dev
->name
,
1349 port
->aggregator
->aggregator_identifier
);
1352 // search on all aggregators for a suitable aggregator for this port
1353 for (aggregator
= __get_first_agg(port
); aggregator
;
1354 aggregator
= __get_next_agg(aggregator
)) {
1356 // keep a free aggregator for later use(if needed)
1357 if (!aggregator
->lag_ports
) {
1358 if (!free_aggregator
) {
1359 free_aggregator
=aggregator
;
1363 // check if current aggregator suits us
1364 if (((aggregator
->actor_oper_aggregator_key
== port
->actor_oper_port_key
) && // if all parameters match AND
1365 !MAC_ADDRESS_COMPARE(&(aggregator
->partner_system
), &(port
->partner_oper_system
)) &&
1366 (aggregator
->partner_system_priority
== port
->partner_oper_system_priority
) &&
1367 (aggregator
->partner_oper_aggregator_key
== port
->partner_oper_key
)
1369 ((MAC_ADDRESS_COMPARE(&(port
->partner_oper_system
), &(null_mac_addr
)) && // partner answers
1370 !aggregator
->is_individual
) // but is not individual OR
1373 // attach to the founded aggregator
1374 port
->aggregator
= aggregator
;
1375 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1376 port
->next_port_in_aggregator
=aggregator
->lag_ports
;
1377 port
->aggregator
->num_of_ports
++;
1378 aggregator
->lag_ports
=port
;
1379 pr_debug("Port %d joined LAG %d(existing LAG)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1381 // mark this port as selected
1382 port
->sm_vars
|= AD_PORT_SELECTED
;
1388 // the port couldn't find an aggregator - attach it to a new aggregator
1390 if (free_aggregator
) {
1391 // assign port a new aggregator
1392 port
->aggregator
= free_aggregator
;
1393 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1395 // update the new aggregator's parameters
1396 // if port was responsed from the end-user
1397 if (port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
) {// if port is full duplex
1398 port
->aggregator
->is_individual
= 0;
1400 port
->aggregator
->is_individual
= 1;
1403 port
->aggregator
->actor_admin_aggregator_key
= port
->actor_admin_port_key
;
1404 port
->aggregator
->actor_oper_aggregator_key
= port
->actor_oper_port_key
;
1405 port
->aggregator
->partner_system
=port
->partner_oper_system
;
1406 port
->aggregator
->partner_system_priority
= port
->partner_oper_system_priority
;
1407 port
->aggregator
->partner_oper_aggregator_key
= port
->partner_oper_key
;
1408 port
->aggregator
->receive_state
= 1;
1409 port
->aggregator
->transmit_state
= 1;
1410 port
->aggregator
->lag_ports
= port
;
1411 port
->aggregator
->num_of_ports
++;
1413 // mark this port as selected
1414 port
->sm_vars
|= AD_PORT_SELECTED
;
1416 pr_debug("Port %d joined LAG %d(new LAG)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1418 printk(KERN_ERR DRV_NAME
": %s: Port %d (on %s) did not find a suitable aggregator\n",
1419 port
->slave
->dev
->master
->name
,
1420 port
->actor_port_number
, port
->slave
->dev
->name
);
1423 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1424 // else set ready=FALSE in all aggregator's ports
1425 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
1427 aggregator
= __get_first_agg(port
);
1428 ad_agg_selection_logic(aggregator
);
1432 * Decide if "agg" is a better choice for the new active aggregator that
1433 * the current best, according to the ad_select policy.
1435 static struct aggregator
*ad_agg_selection_test(struct aggregator
*best
,
1436 struct aggregator
*curr
)
1439 * 0. If no best, select current.
1441 * 1. If the current agg is not individual, and the best is
1442 * individual, select current.
1444 * 2. If current agg is individual and the best is not, keep best.
1446 * 3. Therefore, current and best are both individual or both not
1449 * 3a. If current agg partner replied, and best agg partner did not,
1452 * 3b. If current agg partner did not reply and best agg partner
1453 * did reply, keep best.
1455 * 4. Therefore, current and best both have partner replies or
1456 * both do not, so perform selection policy:
1458 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1459 * select by bandwidth.
1461 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1466 if (!curr
->is_individual
&& best
->is_individual
)
1469 if (curr
->is_individual
&& !best
->is_individual
)
1472 if (__agg_has_partner(curr
) && !__agg_has_partner(best
))
1475 if (!__agg_has_partner(curr
) && __agg_has_partner(best
))
1478 switch (__get_agg_selection_mode(curr
->lag_ports
)) {
1480 if (curr
->num_of_ports
> best
->num_of_ports
)
1483 if (curr
->num_of_ports
< best
->num_of_ports
)
1487 case BOND_AD_STABLE
:
1488 case BOND_AD_BANDWIDTH
:
1489 if (__get_agg_bandwidth(curr
) > __get_agg_bandwidth(best
))
1495 printk(KERN_WARNING DRV_NAME
1496 ": %s: Impossible agg select mode %d\n",
1497 curr
->slave
->dev
->master
->name
,
1498 __get_agg_selection_mode(curr
->lag_ports
));
1506 * ad_agg_selection_logic - select an aggregation group for a team
1507 * @aggregator: the aggregator we're looking at
1509 * It is assumed that only one aggregator may be selected for a team.
1511 * The logic of this function is to select the aggregator according to
1512 * the ad_select policy:
1514 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1515 * it, and to reselect the active aggregator only if the previous
1516 * aggregator has no more ports related to it.
1518 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1519 * bandwidth, and reselect whenever a link state change takes place or the
1520 * set of slaves in the bond changes.
1522 * BOND_AD_COUNT: select the aggregator with largest number of ports
1523 * (slaves), and reselect whenever a link state change takes place or the
1524 * set of slaves in the bond changes.
1526 * FIXME: this function MUST be called with the first agg in the bond, or
1527 * __get_active_agg() won't work correctly. This function should be better
1528 * called with the bond itself, and retrieve the first agg from it.
1530 static void ad_agg_selection_logic(struct aggregator
*agg
)
1532 struct aggregator
*best
, *active
, *origin
;
1537 active
= __get_active_agg(agg
);
1543 if (agg
->num_of_ports
)
1544 best
= ad_agg_selection_test(best
, agg
);
1546 } while ((agg
= __get_next_agg(agg
)));
1549 __get_agg_selection_mode(best
->lag_ports
) == BOND_AD_STABLE
) {
1551 * For the STABLE policy, don't replace the old active
1552 * aggregator if it's still active (it has an answering
1553 * partner) or if both the best and active don't have an
1554 * answering partner.
1556 if (active
&& active
->lag_ports
&&
1557 active
->lag_ports
->is_enabled
&&
1558 (__agg_has_partner(active
) ||
1559 (!__agg_has_partner(active
) && !__agg_has_partner(best
)))) {
1560 if (!(!active
->actor_oper_aggregator_key
&&
1561 best
->actor_oper_aggregator_key
)) {
1563 active
->is_active
= 1;
1568 if (best
&& (best
== active
)) {
1570 active
->is_active
= 1;
1573 // if there is new best aggregator, activate it
1575 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1576 best
->aggregator_identifier
, best
->num_of_ports
,
1577 best
->actor_oper_aggregator_key
,
1578 best
->partner_oper_aggregator_key
,
1579 best
->is_individual
, best
->is_active
);
1580 pr_debug("best ports %p slave %p %s\n",
1581 best
->lag_ports
, best
->slave
,
1582 best
->slave
? best
->slave
->dev
->name
: "NULL");
1584 for (agg
= __get_first_agg(best
->lag_ports
); agg
;
1585 agg
= __get_next_agg(agg
)) {
1587 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1588 agg
->aggregator_identifier
, agg
->num_of_ports
,
1589 agg
->actor_oper_aggregator_key
,
1590 agg
->partner_oper_aggregator_key
,
1591 agg
->is_individual
, agg
->is_active
);
1594 // check if any partner replys
1595 if (best
->is_individual
) {
1596 printk(KERN_WARNING DRV_NAME
": %s: Warning: No 802.3ad"
1597 " response from the link partner for any"
1598 " adapters in the bond\n",
1599 best
->slave
->dev
->master
->name
);
1602 best
->is_active
= 1;
1603 pr_debug("LAG %d chosen as the active LAG\n",
1604 best
->aggregator_identifier
);
1605 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1606 best
->aggregator_identifier
, best
->num_of_ports
,
1607 best
->actor_oper_aggregator_key
,
1608 best
->partner_oper_aggregator_key
,
1609 best
->is_individual
, best
->is_active
);
1611 // disable the ports that were related to the former active_aggregator
1613 for (port
= active
->lag_ports
; port
;
1614 port
= port
->next_port_in_aggregator
) {
1615 __disable_port(port
);
1621 * if the selected aggregator is of join individuals
1622 * (partner_system is NULL), enable their ports
1624 active
= __get_active_agg(origin
);
1627 if (!__agg_has_partner(active
)) {
1628 for (port
= active
->lag_ports
; port
;
1629 port
= port
->next_port_in_aggregator
) {
1630 __enable_port(port
);
1635 if (origin
->slave
) {
1636 struct bonding
*bond
;
1638 bond
= bond_get_bond_by_slave(origin
->slave
);
1640 bond_3ad_set_carrier(bond
);
1645 * ad_clear_agg - clear a given aggregator's parameters
1646 * @aggregator: the aggregator we're looking at
1649 static void ad_clear_agg(struct aggregator
*aggregator
)
1652 aggregator
->is_individual
= 0;
1653 aggregator
->actor_admin_aggregator_key
= 0;
1654 aggregator
->actor_oper_aggregator_key
= 0;
1655 aggregator
->partner_system
= null_mac_addr
;
1656 aggregator
->partner_system_priority
= 0;
1657 aggregator
->partner_oper_aggregator_key
= 0;
1658 aggregator
->receive_state
= 0;
1659 aggregator
->transmit_state
= 0;
1660 aggregator
->lag_ports
= NULL
;
1661 aggregator
->is_active
= 0;
1662 aggregator
->num_of_ports
= 0;
1663 pr_debug("LAG %d was cleared\n", aggregator
->aggregator_identifier
);
1668 * ad_initialize_agg - initialize a given aggregator's parameters
1669 * @aggregator: the aggregator we're looking at
1672 static void ad_initialize_agg(struct aggregator
*aggregator
)
1675 ad_clear_agg(aggregator
);
1677 aggregator
->aggregator_mac_address
= null_mac_addr
;
1678 aggregator
->aggregator_identifier
= 0;
1679 aggregator
->slave
= NULL
;
1684 * ad_initialize_port - initialize a given port's parameters
1685 * @aggregator: the aggregator we're looking at
1686 * @lacp_fast: boolean. whether fast periodic should be used
1689 static void ad_initialize_port(struct port
*port
, int lacp_fast
)
1692 port
->actor_port_number
= 1;
1693 port
->actor_port_priority
= 0xff;
1694 port
->actor_system
= null_mac_addr
;
1695 port
->actor_system_priority
= 0xffff;
1696 port
->actor_port_aggregator_identifier
= 0;
1698 port
->actor_admin_port_key
= 1;
1699 port
->actor_oper_port_key
= 1;
1700 port
->actor_admin_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1701 port
->actor_oper_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1704 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
1707 port
->partner_admin_system
= null_mac_addr
;
1708 port
->partner_oper_system
= null_mac_addr
;
1709 port
->partner_admin_system_priority
= 0xffff;
1710 port
->partner_oper_system_priority
= 0xffff;
1711 port
->partner_admin_key
= 1;
1712 port
->partner_oper_key
= 1;
1713 port
->partner_admin_port_number
= 1;
1714 port
->partner_oper_port_number
= 1;
1715 port
->partner_admin_port_priority
= 0xff;
1716 port
->partner_oper_port_priority
= 0xff;
1717 port
->partner_admin_port_state
= 1;
1718 port
->partner_oper_port_state
= 1;
1719 port
->is_enabled
= 1;
1720 // ****** private parameters ******
1721 port
->sm_vars
= 0x3;
1722 port
->sm_rx_state
= 0;
1723 port
->sm_rx_timer_counter
= 0;
1724 port
->sm_periodic_state
= 0;
1725 port
->sm_periodic_timer_counter
= 0;
1726 port
->sm_mux_state
= 0;
1727 port
->sm_mux_timer_counter
= 0;
1728 port
->sm_tx_state
= 0;
1729 port
->sm_tx_timer_counter
= 0;
1731 port
->aggregator
= NULL
;
1732 port
->next_port_in_aggregator
= NULL
;
1733 port
->transaction_id
= 0;
1735 ad_initialize_lacpdu(&(port
->lacpdu
));
1740 * ad_enable_collecting_distributing - enable a port's transmit/receive
1741 * @port: the port we're looking at
1743 * Enable @port if it's in an active aggregator
1745 static void ad_enable_collecting_distributing(struct port
*port
)
1747 if (port
->aggregator
->is_active
) {
1748 pr_debug("Enabling port %d(LAG %d)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1749 __enable_port(port
);
1754 * ad_disable_collecting_distributing - disable a port's transmit/receive
1755 * @port: the port we're looking at
1758 static void ad_disable_collecting_distributing(struct port
*port
)
1760 if (port
->aggregator
&& MAC_ADDRESS_COMPARE(&(port
->aggregator
->partner_system
), &(null_mac_addr
))) {
1761 pr_debug("Disabling port %d(LAG %d)\n", port
->actor_port_number
, port
->aggregator
->aggregator_identifier
);
1762 __disable_port(port
);
1768 * ad_marker_info_send - send a marker information frame
1769 * @port: the port we're looking at
1771 * This function does nothing since we decided not to implement send and handle
1772 * response for marker PDU's, in this stage, but only to respond to marker
1775 static void ad_marker_info_send(struct port
*port
)
1777 struct bond_marker marker
;
1780 // fill the marker PDU with the appropriate values
1781 marker
.subtype
= 0x02;
1782 marker
.version_number
= 0x01;
1783 marker
.tlv_type
= AD_MARKER_INFORMATION_SUBTYPE
;
1784 marker
.marker_length
= 0x16;
1785 // convert requester_port to Big Endian
1786 marker
.requester_port
= (((port
->actor_port_number
& 0xFF) << 8) |((u16
)(port
->actor_port_number
& 0xFF00) >> 8));
1787 marker
.requester_system
= port
->actor_system
;
1788 // convert requester_port(u32) to Big Endian
1789 marker
.requester_transaction_id
= (((++port
->transaction_id
& 0xFF) << 24) |((port
->transaction_id
& 0xFF00) << 8) |((port
->transaction_id
& 0xFF0000) >> 8) |((port
->transaction_id
& 0xFF000000) >> 24));
1791 marker
.tlv_type_terminator
= 0x00;
1792 marker
.terminator_length
= 0x00;
1793 for (index
=0; index
<90; index
++) {
1794 marker
.reserved_90
[index
]=0;
1797 // send the marker information
1798 if (ad_marker_send(port
, &marker
) >= 0) {
1799 pr_debug("Sent Marker Information on port %d\n", port
->actor_port_number
);
1805 * ad_marker_info_received - handle receive of a Marker information frame
1806 * @marker_info: Marker info received
1807 * @port: the port we're looking at
1810 static void ad_marker_info_received(struct bond_marker
*marker_info
,
1813 struct bond_marker marker
;
1815 // copy the received marker data to the response marker
1816 //marker = *marker_info;
1817 memcpy(&marker
, marker_info
, sizeof(struct bond_marker
));
1818 // change the marker subtype to marker response
1819 marker
.tlv_type
=AD_MARKER_RESPONSE_SUBTYPE
;
1820 // send the marker response
1822 if (ad_marker_send(port
, &marker
) >= 0) {
1823 pr_debug("Sent Marker Response on port %d\n", port
->actor_port_number
);
1828 * ad_marker_response_received - handle receive of a marker response frame
1829 * @marker: marker PDU received
1830 * @port: the port we're looking at
1832 * This function does nothing since we decided not to implement send and handle
1833 * response for marker PDU's, in this stage, but only to respond to marker
1836 static void ad_marker_response_received(struct bond_marker
*marker
,
1839 marker
=NULL
; // just to satisfy the compiler
1840 port
=NULL
; // just to satisfy the compiler
1841 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1845 * ad_initialize_lacpdu - initialize a given lacpdu structure
1846 * @lacpdu: lacpdu structure to initialize
1849 static void ad_initialize_lacpdu(struct lacpdu
*lacpdu
)
1853 // initialize lacpdu data
1854 lacpdu
->subtype
= 0x01;
1855 lacpdu
->version_number
= 0x01;
1856 lacpdu
->tlv_type_actor_info
= 0x01;
1857 lacpdu
->actor_information_length
= 0x14;
1858 // lacpdu->actor_system_priority updated on send
1859 // lacpdu->actor_system updated on send
1860 // lacpdu->actor_key updated on send
1861 // lacpdu->actor_port_priority updated on send
1862 // lacpdu->actor_port updated on send
1863 // lacpdu->actor_state updated on send
1864 lacpdu
->tlv_type_partner_info
= 0x02;
1865 lacpdu
->partner_information_length
= 0x14;
1866 for (index
=0; index
<=2; index
++) {
1867 lacpdu
->reserved_3_1
[index
]=0;
1869 // lacpdu->partner_system_priority updated on send
1870 // lacpdu->partner_system updated on send
1871 // lacpdu->partner_key updated on send
1872 // lacpdu->partner_port_priority updated on send
1873 // lacpdu->partner_port updated on send
1874 // lacpdu->partner_state updated on send
1875 for (index
=0; index
<=2; index
++) {
1876 lacpdu
->reserved_3_2
[index
]=0;
1878 lacpdu
->tlv_type_collector_info
= 0x03;
1879 lacpdu
->collector_information_length
= 0x10;
1880 lacpdu
->collector_max_delay
= htons(AD_COLLECTOR_MAX_DELAY
);
1881 for (index
=0; index
<=11; index
++) {
1882 lacpdu
->reserved_12
[index
]=0;
1884 lacpdu
->tlv_type_terminator
= 0x00;
1885 lacpdu
->terminator_length
= 0;
1886 for (index
=0; index
<=49; index
++) {
1887 lacpdu
->reserved_50
[index
]=0;
1891 //////////////////////////////////////////////////////////////////////////////////////
1892 // ================= AD exported functions to the main bonding code ==================
1893 //////////////////////////////////////////////////////////////////////////////////////
1895 // Check aggregators status in team every T seconds
1896 #define AD_AGGREGATOR_SELECTION_TIMER 8
1899 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1901 * Set the aggregation selection timer, to initiate an agg selection in
1902 * the very near future. Called during first initialization, and during
1903 * any down to up transitions of the bond.
1905 void bond_3ad_initiate_agg_selection(struct bonding
*bond
, int timeout
)
1907 BOND_AD_INFO(bond
).agg_select_timer
= timeout
;
1908 BOND_AD_INFO(bond
).agg_select_mode
= bond
->params
.ad_select
;
1911 static u16 aggregator_identifier
;
1914 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1915 * @bond: bonding struct to work on
1916 * @tick_resolution: tick duration (millisecond resolution)
1917 * @lacp_fast: boolean. whether fast periodic should be used
1919 * Can be called only after the mac address of the bond is set.
1921 void bond_3ad_initialize(struct bonding
*bond
, u16 tick_resolution
, int lacp_fast
)
1923 // check that the bond is not initialized yet
1924 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond
).system
.sys_mac_addr
), &(bond
->dev
->dev_addr
))) {
1926 aggregator_identifier
= 0;
1928 BOND_AD_INFO(bond
).lacp_fast
= lacp_fast
;
1929 BOND_AD_INFO(bond
).system
.sys_priority
= 0xFFFF;
1930 BOND_AD_INFO(bond
).system
.sys_mac_addr
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1932 // initialize how many times this module is called in one second(should be about every 100ms)
1933 ad_ticks_per_sec
= tick_resolution
;
1935 bond_3ad_initiate_agg_selection(bond
,
1936 AD_AGGREGATOR_SELECTION_TIMER
*
1942 * bond_3ad_bind_slave - initialize a slave's port
1943 * @slave: slave struct to work on
1945 * Returns: 0 on success
1948 int bond_3ad_bind_slave(struct slave
*slave
)
1950 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1952 struct aggregator
*aggregator
;
1955 printk(KERN_ERR DRV_NAME
": %s: The slave %s is not attached to its bond\n",
1956 slave
->dev
->master
->name
, slave
->dev
->name
);
1960 //check that the slave has not been intialized yet.
1961 if (SLAVE_AD_INFO(slave
).port
.slave
!= slave
) {
1963 // port initialization
1964 port
= &(SLAVE_AD_INFO(slave
).port
);
1966 ad_initialize_port(port
, BOND_AD_INFO(bond
).lacp_fast
);
1968 port
->slave
= slave
;
1969 port
->actor_port_number
= SLAVE_AD_INFO(slave
).id
;
1970 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1971 // ------------------------------------------------------------
1972 // Port key : | User key | Speed |Duplex|
1973 // ------------------------------------------------------------
1975 port
->actor_admin_port_key
= 0; // initialize this parameter
1976 port
->actor_admin_port_key
|= __get_duplex(port
);
1977 port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
1978 port
->actor_oper_port_key
= port
->actor_admin_port_key
;
1979 // if the port is not full duplex, then the port should be not lacp Enabled
1980 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
)) {
1981 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1983 // actor system is the bond's system
1984 port
->actor_system
= BOND_AD_INFO(bond
).system
.sys_mac_addr
;
1985 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1986 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1987 port
->aggregator
= NULL
;
1988 port
->next_port_in_aggregator
= NULL
;
1990 __disable_port(port
);
1991 __initialize_port_locks(port
);
1994 // aggregator initialization
1995 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
1997 ad_initialize_agg(aggregator
);
1999 aggregator
->aggregator_mac_address
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
2000 aggregator
->aggregator_identifier
= (++aggregator_identifier
);
2001 aggregator
->slave
= slave
;
2002 aggregator
->is_active
= 0;
2003 aggregator
->num_of_ports
= 0;
2010 * bond_3ad_unbind_slave - deinitialize a slave's port
2011 * @slave: slave struct to work on
2013 * Search for the aggregator that is related to this port, remove the
2014 * aggregator and assign another aggregator for other port related to it
2015 * (if any), and remove the port.
2017 void bond_3ad_unbind_slave(struct slave
*slave
)
2019 struct port
*port
, *prev_port
, *temp_port
;
2020 struct aggregator
*aggregator
, *new_aggregator
, *temp_aggregator
;
2021 int select_new_active_agg
= 0;
2023 // find the aggregator related to this slave
2024 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
2026 // find the port related to this slave
2027 port
= &(SLAVE_AD_INFO(slave
).port
);
2029 // if slave is null, the whole port is not initialized
2031 printk(KERN_WARNING DRV_NAME
": Warning: %s: Trying to "
2032 "unbind an uninitialized port on %s\n",
2033 slave
->dev
->master
->name
, slave
->dev
->name
);
2037 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator
->aggregator_identifier
);
2039 /* Tell the partner that this port is not suitable for aggregation */
2040 port
->actor_oper_port_state
&= ~AD_STATE_AGGREGATION
;
2041 __update_lacpdu_from_port(port
);
2042 ad_lacpdu_send(port
);
2044 // check if this aggregator is occupied
2045 if (aggregator
->lag_ports
) {
2046 // check if there are other ports related to this aggregator except
2047 // the port related to this slave(thats ensure us that there is a
2048 // reason to search for new aggregator, and that we will find one
2049 if ((aggregator
->lag_ports
!= port
) || (aggregator
->lag_ports
->next_port_in_aggregator
)) {
2050 // find new aggregator for the related port(s)
2051 new_aggregator
= __get_first_agg(port
);
2052 for (; new_aggregator
; new_aggregator
= __get_next_agg(new_aggregator
)) {
2053 // if the new aggregator is empty, or it connected to to our port only
2054 if (!new_aggregator
->lag_ports
|| ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
)) {
2058 // if new aggregator found, copy the aggregator's parameters
2059 // and connect the related lag_ports to the new aggregator
2060 if ((new_aggregator
) && ((!new_aggregator
->lag_ports
) || ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
))) {
2061 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator
->aggregator_identifier
, new_aggregator
->aggregator_identifier
);
2063 if ((new_aggregator
->lag_ports
== port
) && new_aggregator
->is_active
) {
2064 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2065 aggregator
->slave
->dev
->master
->name
);
2066 // select new active aggregator
2067 select_new_active_agg
= 1;
2070 new_aggregator
->is_individual
= aggregator
->is_individual
;
2071 new_aggregator
->actor_admin_aggregator_key
= aggregator
->actor_admin_aggregator_key
;
2072 new_aggregator
->actor_oper_aggregator_key
= aggregator
->actor_oper_aggregator_key
;
2073 new_aggregator
->partner_system
= aggregator
->partner_system
;
2074 new_aggregator
->partner_system_priority
= aggregator
->partner_system_priority
;
2075 new_aggregator
->partner_oper_aggregator_key
= aggregator
->partner_oper_aggregator_key
;
2076 new_aggregator
->receive_state
= aggregator
->receive_state
;
2077 new_aggregator
->transmit_state
= aggregator
->transmit_state
;
2078 new_aggregator
->lag_ports
= aggregator
->lag_ports
;
2079 new_aggregator
->is_active
= aggregator
->is_active
;
2080 new_aggregator
->num_of_ports
= aggregator
->num_of_ports
;
2082 // update the information that is written on the ports about the aggregator
2083 for (temp_port
=aggregator
->lag_ports
; temp_port
; temp_port
=temp_port
->next_port_in_aggregator
) {
2084 temp_port
->aggregator
=new_aggregator
;
2085 temp_port
->actor_port_aggregator_identifier
= new_aggregator
->aggregator_identifier
;
2088 // clear the aggregator
2089 ad_clear_agg(aggregator
);
2091 if (select_new_active_agg
) {
2092 ad_agg_selection_logic(__get_first_agg(port
));
2095 printk(KERN_WARNING DRV_NAME
": %s: Warning: unbinding aggregator, "
2096 "and could not find a new aggregator for its ports\n",
2097 slave
->dev
->master
->name
);
2099 } else { // in case that the only port related to this aggregator is the one we want to remove
2100 select_new_active_agg
= aggregator
->is_active
;
2101 // clear the aggregator
2102 ad_clear_agg(aggregator
);
2103 if (select_new_active_agg
) {
2104 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2105 slave
->dev
->master
->name
);
2106 // select new active aggregator
2107 ad_agg_selection_logic(__get_first_agg(port
));
2112 pr_debug("Unbinding port %d\n", port
->actor_port_number
);
2113 // find the aggregator that this port is connected to
2114 temp_aggregator
= __get_first_agg(port
);
2115 for (; temp_aggregator
; temp_aggregator
= __get_next_agg(temp_aggregator
)) {
2117 // search the port in the aggregator's related ports
2118 for (temp_port
=temp_aggregator
->lag_ports
; temp_port
; prev_port
=temp_port
, temp_port
=temp_port
->next_port_in_aggregator
) {
2119 if (temp_port
== port
) { // the aggregator found - detach the port from this aggregator
2121 prev_port
->next_port_in_aggregator
= temp_port
->next_port_in_aggregator
;
2123 temp_aggregator
->lag_ports
= temp_port
->next_port_in_aggregator
;
2125 temp_aggregator
->num_of_ports
--;
2126 if (temp_aggregator
->num_of_ports
==0) {
2127 select_new_active_agg
= temp_aggregator
->is_active
;
2128 // clear the aggregator
2129 ad_clear_agg(temp_aggregator
);
2130 if (select_new_active_agg
) {
2131 printk(KERN_INFO DRV_NAME
": %s: Removing an active aggregator\n",
2132 slave
->dev
->master
->name
);
2133 // select new active aggregator
2134 ad_agg_selection_logic(__get_first_agg(port
));
2145 * bond_3ad_state_machine_handler - handle state machines timeout
2146 * @bond: bonding struct to work on
2148 * The state machine handling concept in this module is to check every tick
2149 * which state machine should operate any function. The execution order is
2150 * round robin, so when we have an interaction between state machines, the
2151 * reply of one to each other might be delayed until next tick.
2153 * This function also complete the initialization when the agg_select_timer
2154 * times out, and it selects an aggregator for the ports that are yet not
2155 * related to any aggregator, and selects the active aggregator for a bond.
2157 void bond_3ad_state_machine_handler(struct work_struct
*work
)
2159 struct bonding
*bond
= container_of(work
, struct bonding
,
2162 struct aggregator
*aggregator
;
2164 read_lock(&bond
->lock
);
2166 if (bond
->kill_timers
) {
2170 //check if there are any slaves
2171 if (bond
->slave_cnt
== 0) {
2175 // check if agg_select_timer timer after initialize is timed out
2176 if (BOND_AD_INFO(bond
).agg_select_timer
&& !(--BOND_AD_INFO(bond
).agg_select_timer
)) {
2177 // select the active aggregator for the bond
2178 if ((port
= __get_first_port(bond
))) {
2180 printk(KERN_WARNING DRV_NAME
": %s: Warning: bond's first port is "
2181 "uninitialized\n", bond
->dev
->name
);
2185 aggregator
= __get_first_agg(port
);
2186 ad_agg_selection_logic(aggregator
);
2188 bond_3ad_set_carrier(bond
);
2191 // for each port run the state machines
2192 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2194 printk(KERN_WARNING DRV_NAME
": %s: Warning: Found an uninitialized "
2195 "port\n", bond
->dev
->name
);
2199 ad_rx_machine(NULL
, port
);
2200 ad_periodic_machine(port
);
2201 ad_port_selection_logic(port
);
2202 ad_mux_machine(port
);
2203 ad_tx_machine(port
);
2205 // turn off the BEGIN bit, since we already handled it
2206 if (port
->sm_vars
& AD_PORT_BEGIN
) {
2207 port
->sm_vars
&= ~AD_PORT_BEGIN
;
2212 queue_delayed_work(bond
->wq
, &bond
->ad_work
, ad_delta_in_ticks
);
2214 read_unlock(&bond
->lock
);
2218 * bond_3ad_rx_indication - handle a received frame
2219 * @lacpdu: received lacpdu
2220 * @slave: slave struct to work on
2221 * @length: length of the data received
2223 * It is assumed that frames that were sent on this NIC don't returned as new
2224 * received frames (loopback). Since only the payload is given to this
2225 * function, it check for loopback.
2227 static void bond_3ad_rx_indication(struct lacpdu
*lacpdu
, struct slave
*slave
, u16 length
)
2231 if (length
>= sizeof(struct lacpdu
)) {
2233 port
= &(SLAVE_AD_INFO(slave
).port
);
2236 printk(KERN_WARNING DRV_NAME
": %s: Warning: port of slave %s is "
2237 "uninitialized\n", slave
->dev
->name
, slave
->dev
->master
->name
);
2241 switch (lacpdu
->subtype
) {
2242 case AD_TYPE_LACPDU
:
2243 pr_debug("Received LACPDU on port %d\n", port
->actor_port_number
);
2244 ad_rx_machine(lacpdu
, port
);
2247 case AD_TYPE_MARKER
:
2248 // No need to convert fields to Little Endian since we don't use the marker's fields.
2250 switch (((struct bond_marker
*)lacpdu
)->tlv_type
) {
2251 case AD_MARKER_INFORMATION_SUBTYPE
:
2252 pr_debug("Received Marker Information on port %d\n", port
->actor_port_number
);
2253 ad_marker_info_received((struct bond_marker
*)lacpdu
, port
);
2256 case AD_MARKER_RESPONSE_SUBTYPE
:
2257 pr_debug("Received Marker Response on port %d\n", port
->actor_port_number
);
2258 ad_marker_response_received((struct bond_marker
*)lacpdu
, port
);
2262 pr_debug("Received an unknown Marker subtype on slot %d\n", port
->actor_port_number
);
2269 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2270 * @slave: slave struct to work on
2272 * Handle reselection of aggregator (if needed) for this port.
2274 void bond_3ad_adapter_speed_changed(struct slave
*slave
)
2278 port
= &(SLAVE_AD_INFO(slave
).port
);
2280 // if slave is null, the whole port is not initialized
2282 printk(KERN_WARNING DRV_NAME
": Warning: %s: speed "
2283 "changed for uninitialized port on %s\n",
2284 slave
->dev
->master
->name
, slave
->dev
->name
);
2288 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2289 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2290 pr_debug("Port %d changed speed\n", port
->actor_port_number
);
2291 // there is no need to reselect a new aggregator, just signal the
2292 // state machines to reinitialize
2293 port
->sm_vars
|= AD_PORT_BEGIN
;
2297 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2298 * @slave: slave struct to work on
2300 * Handle reselection of aggregator (if needed) for this port.
2302 void bond_3ad_adapter_duplex_changed(struct slave
*slave
)
2306 port
=&(SLAVE_AD_INFO(slave
).port
);
2308 // if slave is null, the whole port is not initialized
2310 printk(KERN_WARNING DRV_NAME
": %s: Warning: duplex changed "
2311 "for uninitialized port on %s\n",
2312 slave
->dev
->master
->name
, slave
->dev
->name
);
2316 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2317 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2318 pr_debug("Port %d changed duplex\n", port
->actor_port_number
);
2319 // there is no need to reselect a new aggregator, just signal the
2320 // state machines to reinitialize
2321 port
->sm_vars
|= AD_PORT_BEGIN
;
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 printk(KERN_WARNING DRV_NAME
": Warning: %s: link status changed for "
2340 "uninitialized port on %s\n",
2341 slave
->dev
->master
->name
, slave
->dev
->name
);
2345 // 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)
2346 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2347 if (link
== BOND_LINK_UP
) {
2348 port
->is_enabled
= 1;
2349 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2350 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2351 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2352 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2354 /* link has failed */
2355 port
->is_enabled
= 0;
2356 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2357 port
->actor_oper_port_key
= (port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
);
2359 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2360 // there is no need to reselect a new aggregator, just signal the
2361 // state machines to reinitialize
2362 port
->sm_vars
|= AD_PORT_BEGIN
;
2366 * set link state for bonding master: if we have an active
2367 * aggregator, we're up, if not, we're down. Presumes that we cannot
2368 * have an active aggregator if there are no slaves with link up.
2370 * This behavior complies with IEEE 802.3 section 43.3.9.
2372 * Called by bond_set_carrier(). Return zero if carrier state does not
2373 * change, nonzero if it does.
2375 int bond_3ad_set_carrier(struct bonding
*bond
)
2377 if (__get_active_agg(&(SLAVE_AD_INFO(bond
->first_slave
).aggregator
))) {
2378 if (!netif_carrier_ok(bond
->dev
)) {
2379 netif_carrier_on(bond
->dev
);
2385 if (netif_carrier_ok(bond
->dev
)) {
2386 netif_carrier_off(bond
->dev
);
2393 * bond_3ad_get_active_agg_info - get information of the active aggregator
2394 * @bond: bonding struct to work on
2395 * @ad_info: ad_info struct to fill with the bond's info
2397 * Returns: 0 on success
2400 int bond_3ad_get_active_agg_info(struct bonding
*bond
, struct ad_info
*ad_info
)
2402 struct aggregator
*aggregator
= NULL
;
2405 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2406 if (port
->aggregator
&& port
->aggregator
->is_active
) {
2407 aggregator
= port
->aggregator
;
2413 ad_info
->aggregator_id
= aggregator
->aggregator_identifier
;
2414 ad_info
->ports
= aggregator
->num_of_ports
;
2415 ad_info
->actor_key
= aggregator
->actor_oper_aggregator_key
;
2416 ad_info
->partner_key
= aggregator
->partner_oper_aggregator_key
;
2417 memcpy(ad_info
->partner_system
, aggregator
->partner_system
.mac_addr_value
, ETH_ALEN
);
2424 int bond_3ad_xmit_xor(struct sk_buff
*skb
, struct net_device
*dev
)
2426 struct slave
*slave
, *start_at
;
2427 struct bonding
*bond
= netdev_priv(dev
);
2432 struct ad_info ad_info
;
2435 /* make sure that the slaves list will
2436 * not change during tx
2438 read_lock(&bond
->lock
);
2440 if (!BOND_IS_OK(bond
)) {
2444 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
2445 printk(KERN_DEBUG DRV_NAME
": %s: Error: "
2446 "bond_3ad_get_active_agg_info failed\n", dev
->name
);
2450 slaves_in_agg
= ad_info
.ports
;
2451 agg_id
= ad_info
.aggregator_id
;
2453 if (slaves_in_agg
== 0) {
2454 /*the aggregator is empty*/
2455 printk(KERN_DEBUG DRV_NAME
": %s: Error: active "
2456 "aggregator is empty\n",
2461 slave_agg_no
= bond
->xmit_hash_policy(skb
, dev
, slaves_in_agg
);
2463 bond_for_each_slave(bond
, slave
, i
) {
2464 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2466 if (agg
&& (agg
->aggregator_identifier
== agg_id
)) {
2468 if (slave_agg_no
< 0) {
2474 if (slave_agg_no
>= 0) {
2475 printk(KERN_ERR DRV_NAME
": %s: Error: Couldn't find a slave to tx on "
2476 "for aggregator ID %d\n", dev
->name
, agg_id
);
2482 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
2483 int slave_agg_id
= 0;
2484 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2487 slave_agg_id
= agg
->aggregator_identifier
;
2490 if (SLAVE_IS_OK(slave
) && agg
&& (slave_agg_id
== agg_id
)) {
2491 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
2498 /* no suitable interface, frame not sent */
2501 read_unlock(&bond
->lock
);
2505 int bond_3ad_lacpdu_recv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
* ptype
, struct net_device
*orig_dev
)
2507 struct bonding
*bond
= netdev_priv(dev
);
2508 struct slave
*slave
= NULL
;
2509 int ret
= NET_RX_DROP
;
2511 if (dev_net(dev
) != &init_net
)
2514 if (!(dev
->flags
& IFF_MASTER
))
2517 read_lock(&bond
->lock
);
2518 slave
= bond_get_slave_by_dev((struct bonding
*)netdev_priv(dev
),
2523 bond_3ad_rx_indication((struct lacpdu
*) skb
->data
, slave
, skb
->len
);
2525 ret
= NET_RX_SUCCESS
;
2528 read_unlock(&bond
->lock
);