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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include <linux/skbuff.h>
26 #include <linux/if_ether.h>
27 #include <linux/netdevice.h>
28 #include <linux/spinlock.h>
29 #include <linux/ethtool.h>
30 #include <linux/etherdevice.h>
31 #include <linux/if_bonding.h>
32 #include <linux/pkt_sched.h>
33 #include <net/net_namespace.h>
37 // General definitions
38 #define AD_SHORT_TIMEOUT 1
39 #define AD_LONG_TIMEOUT 0
40 #define AD_STANDBY 0x2
41 #define AD_MAX_TX_IN_SECOND 3
42 #define AD_COLLECTOR_MAX_DELAY 0
44 // Timer definitions(43.4.4 in the 802.3ad standard)
45 #define AD_FAST_PERIODIC_TIME 1
46 #define AD_SLOW_PERIODIC_TIME 30
47 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
48 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
49 #define AD_CHURN_DETECTION_TIME 60
50 #define AD_AGGREGATE_WAIT_TIME 2
52 // Port state definitions(43.4.2.2 in the 802.3ad standard)
53 #define AD_STATE_LACP_ACTIVITY 0x1
54 #define AD_STATE_LACP_TIMEOUT 0x2
55 #define AD_STATE_AGGREGATION 0x4
56 #define AD_STATE_SYNCHRONIZATION 0x8
57 #define AD_STATE_COLLECTING 0x10
58 #define AD_STATE_DISTRIBUTING 0x20
59 #define AD_STATE_DEFAULTED 0x40
60 #define AD_STATE_EXPIRED 0x80
62 // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
63 #define AD_PORT_BEGIN 0x1
64 #define AD_PORT_LACP_ENABLED 0x2
65 #define AD_PORT_ACTOR_CHURN 0x4
66 #define AD_PORT_PARTNER_CHURN 0x8
67 #define AD_PORT_READY 0x10
68 #define AD_PORT_READY_N 0x20
69 #define AD_PORT_MATCHED 0x40
70 #define AD_PORT_STANDBY 0x80
71 #define AD_PORT_SELECTED 0x100
72 #define AD_PORT_MOVED 0x200
74 // Port Key definitions
75 // key is determined according to the link speed, duplex and
76 // user key(which is yet not supported)
77 // ------------------------------------------------------------
78 // Port key : | User key | Speed |Duplex|
79 // ------------------------------------------------------------
81 #define AD_DUPLEX_KEY_BITS 0x1
82 #define AD_SPEED_KEY_BITS 0x3E
83 #define AD_USER_KEY_BITS 0xFFC0
86 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1
87 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2
88 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4
89 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
90 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
93 // compare MAC addresses
94 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
96 static struct mac_addr null_mac_addr
= {{0, 0, 0, 0, 0, 0}};
97 static u16 ad_ticks_per_sec
;
98 static const int ad_delta_in_ticks
= (AD_TIMER_INTERVAL
* HZ
) / 1000;
100 static const u8 lacpdu_mcast_addr
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
102 // ================= main 802.3ad protocol functions ==================
103 static int ad_lacpdu_send(struct port
*port
);
104 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
);
105 static void ad_mux_machine(struct port
*port
);
106 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
);
107 static void ad_tx_machine(struct port
*port
);
108 static void ad_periodic_machine(struct port
*port
);
109 static void ad_port_selection_logic(struct port
*port
);
110 static void ad_agg_selection_logic(struct aggregator
*aggregator
);
111 static void ad_clear_agg(struct aggregator
*aggregator
);
112 static void ad_initialize_agg(struct aggregator
*aggregator
);
113 static void ad_initialize_port(struct port
*port
, int lacp_fast
);
114 static void ad_enable_collecting_distributing(struct port
*port
);
115 static void ad_disable_collecting_distributing(struct port
*port
);
116 static void ad_marker_info_received(struct bond_marker
*marker_info
, struct port
*port
);
117 static void ad_marker_response_received(struct bond_marker
*marker
, struct port
*port
);
120 /////////////////////////////////////////////////////////////////////////////////
121 // ================= api to bonding and kernel code ==================
122 /////////////////////////////////////////////////////////////////////////////////
125 * __get_bond_by_port - get the port's bonding struct
126 * @port: the port we're looking at
128 * Return @port's bonding struct, or %NULL if it can't be found.
130 static inline struct bonding
*__get_bond_by_port(struct port
*port
)
132 if (port
->slave
== NULL
) {
136 return bond_get_bond_by_slave(port
->slave
);
140 * __get_first_port - get the first port in the bond
141 * @bond: the bond we're looking at
143 * Return the port of the first slave in @bond, or %NULL if it can't be found.
145 static inline struct port
*__get_first_port(struct bonding
*bond
)
147 if (bond
->slave_cnt
== 0) {
151 return &(SLAVE_AD_INFO(bond
->first_slave
).port
);
155 * __get_next_port - get the next port in the bond
156 * @port: the port we're looking at
158 * Return the port of the slave that is next in line of @port's slave in the
159 * bond, or %NULL if it can't be found.
161 static inline struct port
*__get_next_port(struct port
*port
)
163 struct bonding
*bond
= __get_bond_by_port(port
);
164 struct slave
*slave
= port
->slave
;
166 // If there's no bond for this port, or this is the last slave
167 if ((bond
== NULL
) || (slave
->next
== bond
->first_slave
)) {
171 return &(SLAVE_AD_INFO(slave
->next
).port
);
175 * __get_first_agg - get the first aggregator in the bond
176 * @bond: the bond we're looking at
178 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
181 static inline struct aggregator
*__get_first_agg(struct port
*port
)
183 struct bonding
*bond
= __get_bond_by_port(port
);
185 // If there's no bond for this port, or bond has no slaves
186 if ((bond
== NULL
) || (bond
->slave_cnt
== 0)) {
190 return &(SLAVE_AD_INFO(bond
->first_slave
).aggregator
);
194 * __get_next_agg - get the next aggregator in the bond
195 * @aggregator: the aggregator we're looking at
197 * Return the aggregator of the slave that is next in line of @aggregator's
198 * slave in the bond, or %NULL if it can't be found.
200 static inline struct aggregator
*__get_next_agg(struct aggregator
*aggregator
)
202 struct slave
*slave
= aggregator
->slave
;
203 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
205 // If there's no bond for this aggregator, or this is the last slave
206 if ((bond
== NULL
) || (slave
->next
== bond
->first_slave
)) {
210 return &(SLAVE_AD_INFO(slave
->next
).aggregator
);
216 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
217 * address for the partner). Return 0 if not.
219 static inline int __agg_has_partner(struct aggregator
*agg
)
221 return !is_zero_ether_addr(agg
->partner_system
.mac_addr_value
);
225 * __disable_port - disable the port's slave
226 * @port: the port we're looking at
229 static inline void __disable_port(struct port
*port
)
231 bond_set_slave_inactive_flags(port
->slave
);
235 * __enable_port - enable the port's slave, if it's up
236 * @port: the port we're looking at
239 static inline void __enable_port(struct port
*port
)
241 struct slave
*slave
= port
->slave
;
243 if ((slave
->link
== BOND_LINK_UP
) && IS_UP(slave
->dev
)) {
244 bond_set_slave_active_flags(slave
);
249 * __port_is_enabled - check if the port's slave is in active state
250 * @port: the port we're looking at
253 static inline int __port_is_enabled(struct port
*port
)
255 return(port
->slave
->state
== BOND_STATE_ACTIVE
);
259 * __get_agg_selection_mode - get the aggregator selection mode
260 * @port: the port we're looking at
262 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
264 static inline u32
__get_agg_selection_mode(struct port
*port
)
266 struct bonding
*bond
= __get_bond_by_port(port
);
269 return BOND_AD_STABLE
;
272 return BOND_AD_INFO(bond
).agg_select_mode
;
276 * __check_agg_selection_timer - check if the selection timer has expired
277 * @port: the port we're looking at
280 static inline int __check_agg_selection_timer(struct port
*port
)
282 struct bonding
*bond
= __get_bond_by_port(port
);
288 return BOND_AD_INFO(bond
).agg_select_timer
? 1 : 0;
292 * __get_rx_machine_lock - lock the port's RX machine
293 * @port: the port we're looking at
296 static inline void __get_rx_machine_lock(struct port
*port
)
298 spin_lock_bh(&(SLAVE_AD_INFO(port
->slave
).rx_machine_lock
));
302 * __release_rx_machine_lock - unlock the port's RX machine
303 * @port: the port we're looking at
306 static inline void __release_rx_machine_lock(struct port
*port
)
308 spin_unlock_bh(&(SLAVE_AD_INFO(port
->slave
).rx_machine_lock
));
312 * __get_link_speed - get a port's speed
313 * @port: the port we're looking at
315 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
317 * %AD_LINK_SPEED_BITMASK_10MBPS,
318 * %AD_LINK_SPEED_BITMASK_100MBPS,
319 * %AD_LINK_SPEED_BITMASK_1000MBPS,
320 * %AD_LINK_SPEED_BITMASK_10000MBPS
322 static u16
__get_link_speed(struct port
*port
)
324 struct slave
*slave
= port
->slave
;
327 /* this if covers only a special case: when the configuration starts with
328 * link down, it sets the speed to 0.
329 * This is done in spite of the fact that the e100 driver reports 0 to be
330 * compatible with MVT in the future.*/
331 if (slave
->link
!= BOND_LINK_UP
) {
334 switch (slave
->speed
) {
336 speed
= AD_LINK_SPEED_BITMASK_10MBPS
;
340 speed
= AD_LINK_SPEED_BITMASK_100MBPS
;
344 speed
= AD_LINK_SPEED_BITMASK_1000MBPS
;
348 speed
= AD_LINK_SPEED_BITMASK_10000MBPS
;
352 speed
= 0; // unknown speed value from ethtool. shouldn't happen
357 pr_debug("Port %d Received link speed %d update from adapter\n",
358 port
->actor_port_number
, speed
);
363 * __get_duplex - get a port's duplex
364 * @port: the port we're looking at
366 * Return @port's duplex in 802.3ad bitmask format. i.e.:
367 * 0x01 if in full duplex
370 static u8
__get_duplex(struct port
*port
)
372 struct slave
*slave
= port
->slave
;
376 // handling a special case: when the configuration starts with
377 // link down, it sets the duplex to 0.
378 if (slave
->link
!= BOND_LINK_UP
) {
381 switch (slave
->duplex
) {
384 pr_debug("Port %d Received status full duplex update from adapter\n",
385 port
->actor_port_number
);
390 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
391 port
->actor_port_number
);
399 * __initialize_port_locks - initialize a port's RX machine spinlock
400 * @port: the port we're looking at
403 static inline void __initialize_port_locks(struct port
*port
)
405 // make sure it isn't called twice
406 spin_lock_init(&(SLAVE_AD_INFO(port
->slave
).rx_machine_lock
));
412 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
413 * @timer_type: which timer to operate
414 * @par: timer parameter. see below
416 * If @timer_type is %current_while_timer, @par indicates long/short timer.
417 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
418 * %SLOW_PERIODIC_TIME.
420 static u16
__ad_timer_to_ticks(u16 timer_type
, u16 par
)
422 u16 retval
=0; //to silence the compiler
424 switch (timer_type
) {
425 case AD_CURRENT_WHILE_TIMER
: // for rx machine usage
426 if (par
) { // for short or long timeout
427 retval
= (AD_SHORT_TIMEOUT_TIME
*ad_ticks_per_sec
); // short timeout
429 retval
= (AD_LONG_TIMEOUT_TIME
*ad_ticks_per_sec
); // long timeout
432 case AD_ACTOR_CHURN_TIMER
: // for local churn machine
433 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
435 case AD_PERIODIC_TIMER
: // for periodic machine
436 retval
= (par
*ad_ticks_per_sec
); // long timeout
438 case AD_PARTNER_CHURN_TIMER
: // for remote churn machine
439 retval
= (AD_CHURN_DETECTION_TIME
*ad_ticks_per_sec
);
441 case AD_WAIT_WHILE_TIMER
: // for selection machine
442 retval
= (AD_AGGREGATE_WAIT_TIME
*ad_ticks_per_sec
);
449 /////////////////////////////////////////////////////////////////////////////////
450 // ================= ad_rx_machine helper functions ==================
451 /////////////////////////////////////////////////////////////////////////////////
454 * __choose_matched - update a port's matched variable from a received lacpdu
455 * @lacpdu: the lacpdu we've received
456 * @port: the port we're looking at
458 * Update the value of the matched variable, using parameter values from a
459 * newly received lacpdu. Parameter values for the partner carried in the
460 * received PDU are compared with the corresponding operational parameter
461 * values for the actor. Matched is set to TRUE if all of these parameters
462 * match and the PDU parameter partner_state.aggregation has the same value as
463 * actor_oper_port_state.aggregation and lacp will actively maintain the link
464 * in the aggregation. Matched is also set to TRUE if the value of
465 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
466 * an individual link and lacp will actively maintain the link. Otherwise,
467 * matched is set to FALSE. LACP is considered to be actively maintaining the
468 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
469 * the actor's actor_oper_port_state.lacp_activity and the PDU's
470 * partner_state.lacp_activity variables are TRUE.
472 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
473 * used here to implement the language from 802.3ad 43.4.9 that requires
474 * recordPDU to "match" the LACPDU parameters to the stored values.
476 static void __choose_matched(struct lacpdu
*lacpdu
, struct port
*port
)
478 // check if all parameters are alike
479 if (((ntohs(lacpdu
->partner_port
) == port
->actor_port_number
) &&
480 (ntohs(lacpdu
->partner_port_priority
) == port
->actor_port_priority
) &&
481 !MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) &&
482 (ntohs(lacpdu
->partner_system_priority
) == port
->actor_system_priority
) &&
483 (ntohs(lacpdu
->partner_key
) == port
->actor_oper_port_key
) &&
484 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) == (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))) ||
485 // or this is individual link(aggregation == FALSE)
486 ((lacpdu
->actor_state
& AD_STATE_AGGREGATION
) == 0)
488 // update the state machine Matched variable
489 port
->sm_vars
|= AD_PORT_MATCHED
;
491 port
->sm_vars
&= ~AD_PORT_MATCHED
;
496 * __record_pdu - record parameters from a received lacpdu
497 * @lacpdu: the lacpdu we've received
498 * @port: the port we're looking at
500 * Record the parameter values for the Actor carried in a received lacpdu as
501 * the current partner operational parameter values and sets
502 * actor_oper_port_state.defaulted to FALSE.
504 static void __record_pdu(struct lacpdu
*lacpdu
, struct port
*port
)
506 if (lacpdu
&& port
) {
507 struct port_params
*partner
= &port
->partner_oper
;
509 __choose_matched(lacpdu
, port
);
510 // record the new parameter values for the partner operational
511 partner
->port_number
= ntohs(lacpdu
->actor_port
);
512 partner
->port_priority
= ntohs(lacpdu
->actor_port_priority
);
513 partner
->system
= lacpdu
->actor_system
;
514 partner
->system_priority
= ntohs(lacpdu
->actor_system_priority
);
515 partner
->key
= ntohs(lacpdu
->actor_key
);
516 partner
->port_state
= lacpdu
->actor_state
;
518 // set actor_oper_port_state.defaulted to FALSE
519 port
->actor_oper_port_state
&= ~AD_STATE_DEFAULTED
;
521 // set the partner sync. to on if the partner is sync. and the port is matched
522 if ((port
->sm_vars
& AD_PORT_MATCHED
) && (lacpdu
->actor_state
& AD_STATE_SYNCHRONIZATION
)) {
523 partner
->port_state
|= AD_STATE_SYNCHRONIZATION
;
525 partner
->port_state
&= ~AD_STATE_SYNCHRONIZATION
;
531 * __record_default - record default parameters
532 * @port: the port we're looking at
534 * This function records the default parameter values for the partner carried
535 * in the Partner Admin parameters as the current partner operational parameter
536 * values and sets actor_oper_port_state.defaulted to TRUE.
538 static void __record_default(struct port
*port
)
541 // record the partner admin parameters
542 memcpy(&port
->partner_oper
, &port
->partner_admin
,
543 sizeof(struct port_params
));
545 // set actor_oper_port_state.defaulted to true
546 port
->actor_oper_port_state
|= AD_STATE_DEFAULTED
;
551 * __update_selected - update a port's Selected variable from a received lacpdu
552 * @lacpdu: the lacpdu we've received
553 * @port: the port we're looking at
555 * Update the value of the selected variable, using parameter values from a
556 * newly received lacpdu. The parameter values for the Actor carried in the
557 * received PDU are compared with the corresponding operational parameter
558 * values for the ports partner. If one or more of the comparisons shows that
559 * the value(s) received in the PDU differ from the current operational values,
560 * then selected is set to FALSE and actor_oper_port_state.synchronization is
561 * set to out_of_sync. Otherwise, selected remains unchanged.
563 static void __update_selected(struct lacpdu
*lacpdu
, struct port
*port
)
565 if (lacpdu
&& port
) {
566 const struct port_params
*partner
= &port
->partner_oper
;
568 // check if any parameter is different
569 if (ntohs(lacpdu
->actor_port
) != partner
->port_number
||
570 ntohs(lacpdu
->actor_port_priority
) != partner
->port_priority
||
571 MAC_ADDRESS_COMPARE(&lacpdu
->actor_system
, &partner
->system
) ||
572 ntohs(lacpdu
->actor_system_priority
) != partner
->system_priority
||
573 ntohs(lacpdu
->actor_key
) != partner
->key
||
574 (lacpdu
->actor_state
& AD_STATE_AGGREGATION
) != (partner
->port_state
& AD_STATE_AGGREGATION
)) {
575 // update the state machine Selected variable
576 port
->sm_vars
&= ~AD_PORT_SELECTED
;
582 * __update_default_selected - update a port's Selected variable from Partner
583 * @port: the port we're looking at
585 * This function updates the value of the selected variable, using the partner
586 * administrative parameter values. The administrative values are compared with
587 * the corresponding operational parameter values for the partner. If one or
588 * more of the comparisons shows that the administrative value(s) differ from
589 * the current operational values, then Selected is set to FALSE and
590 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
591 * Selected remains unchanged.
593 static void __update_default_selected(struct port
*port
)
596 const struct port_params
*admin
= &port
->partner_admin
;
597 const struct port_params
*oper
= &port
->partner_oper
;
599 // check if any parameter is different
600 if (admin
->port_number
!= oper
->port_number
||
601 admin
->port_priority
!= oper
->port_priority
||
602 MAC_ADDRESS_COMPARE(&admin
->system
, &oper
->system
) ||
603 admin
->system_priority
!= oper
->system_priority
||
604 admin
->key
!= oper
->key
||
605 (admin
->port_state
& AD_STATE_AGGREGATION
)
606 != (oper
->port_state
& AD_STATE_AGGREGATION
)) {
607 // update the state machine Selected variable
608 port
->sm_vars
&= ~AD_PORT_SELECTED
;
614 * __update_ntt - update a port's ntt variable from a received lacpdu
615 * @lacpdu: the lacpdu we've received
616 * @port: the port we're looking at
618 * Updates the value of the ntt variable, using parameter values from a newly
619 * received lacpdu. The parameter values for the partner carried in the
620 * received PDU are compared with the corresponding operational parameter
621 * values for the Actor. If one or more of the comparisons shows that the
622 * value(s) received in the PDU differ from the current operational values,
623 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
625 static void __update_ntt(struct lacpdu
*lacpdu
, struct port
*port
)
627 // validate lacpdu and port
628 if (lacpdu
&& port
) {
629 // check if any parameter is different
630 if ((ntohs(lacpdu
->partner_port
) != port
->actor_port_number
) ||
631 (ntohs(lacpdu
->partner_port_priority
) != port
->actor_port_priority
) ||
632 MAC_ADDRESS_COMPARE(&(lacpdu
->partner_system
), &(port
->actor_system
)) ||
633 (ntohs(lacpdu
->partner_system_priority
) != port
->actor_system_priority
) ||
634 (ntohs(lacpdu
->partner_key
) != port
->actor_oper_port_key
) ||
635 ((lacpdu
->partner_state
& AD_STATE_LACP_ACTIVITY
) != (port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
)) ||
636 ((lacpdu
->partner_state
& AD_STATE_LACP_TIMEOUT
) != (port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
)) ||
637 ((lacpdu
->partner_state
& AD_STATE_SYNCHRONIZATION
) != (port
->actor_oper_port_state
& AD_STATE_SYNCHRONIZATION
)) ||
638 ((lacpdu
->partner_state
& AD_STATE_AGGREGATION
) != (port
->actor_oper_port_state
& AD_STATE_AGGREGATION
))
647 * __attach_bond_to_agg
648 * @port: the port we're looking at
650 * Handle the attaching of the port's control parser/multiplexer and the
651 * aggregator. This function does nothing since the parser/multiplexer of the
652 * receive and the parser/multiplexer of the aggregator are already combined.
654 static void __attach_bond_to_agg(struct port
*port
)
656 port
=NULL
; // just to satisfy the compiler
657 // This function does nothing since the parser/multiplexer of the receive
658 // and the parser/multiplexer of the aggregator are already combined
662 * __detach_bond_from_agg
663 * @port: the port we're looking at
665 * Handle the detaching of the port's control parser/multiplexer from the
666 * aggregator. This function does nothing since the parser/multiplexer of the
667 * receive and the parser/multiplexer of the aggregator are already combined.
669 static void __detach_bond_from_agg(struct port
*port
)
671 port
=NULL
; // just to satisfy the compiler
672 // This function does nothing sience the parser/multiplexer of the receive
673 // and the parser/multiplexer of the aggregator are already combined
677 * __agg_ports_are_ready - check if all ports in an aggregator are ready
678 * @aggregator: the aggregator we're looking at
681 static int __agg_ports_are_ready(struct aggregator
*aggregator
)
687 // scan all ports in this aggregator to verfy if they are all ready
688 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
689 if (!(port
->sm_vars
& AD_PORT_READY_N
)) {
700 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
701 * @aggregator: the aggregator we're looking at
702 * @val: Should the ports' ready bit be set on or off
705 static void __set_agg_ports_ready(struct aggregator
*aggregator
, int val
)
709 for (port
=aggregator
->lag_ports
; port
; port
=port
->next_port_in_aggregator
) {
711 port
->sm_vars
|= AD_PORT_READY
;
713 port
->sm_vars
&= ~AD_PORT_READY
;
719 * __get_agg_bandwidth - get the total bandwidth of an aggregator
720 * @aggregator: the aggregator we're looking at
723 static u32
__get_agg_bandwidth(struct aggregator
*aggregator
)
728 if (aggregator
->num_of_ports
) {
729 basic_speed
= __get_link_speed(aggregator
->lag_ports
);
730 switch (basic_speed
) {
731 case AD_LINK_SPEED_BITMASK_1MBPS
:
732 bandwidth
= aggregator
->num_of_ports
;
734 case AD_LINK_SPEED_BITMASK_10MBPS
:
735 bandwidth
= aggregator
->num_of_ports
* 10;
737 case AD_LINK_SPEED_BITMASK_100MBPS
:
738 bandwidth
= aggregator
->num_of_ports
* 100;
740 case AD_LINK_SPEED_BITMASK_1000MBPS
:
741 bandwidth
= aggregator
->num_of_ports
* 1000;
743 case AD_LINK_SPEED_BITMASK_10000MBPS
:
744 bandwidth
= aggregator
->num_of_ports
* 10000;
747 bandwidth
=0; // to silent the compilor ....
754 * __get_active_agg - get the current active aggregator
755 * @aggregator: the aggregator we're looking at
758 static struct aggregator
*__get_active_agg(struct aggregator
*aggregator
)
760 struct aggregator
*retval
= NULL
;
762 for (; aggregator
; aggregator
= __get_next_agg(aggregator
)) {
763 if (aggregator
->is_active
) {
773 * __update_lacpdu_from_port - update a port's lacpdu fields
774 * @port: the port we're looking at
777 static inline void __update_lacpdu_from_port(struct port
*port
)
779 struct lacpdu
*lacpdu
= &port
->lacpdu
;
780 const struct port_params
*partner
= &port
->partner_oper
;
782 /* update current actual Actor parameters */
783 /* lacpdu->subtype initialized
784 * lacpdu->version_number initialized
785 * lacpdu->tlv_type_actor_info initialized
786 * lacpdu->actor_information_length initialized
789 lacpdu
->actor_system_priority
= htons(port
->actor_system_priority
);
790 lacpdu
->actor_system
= port
->actor_system
;
791 lacpdu
->actor_key
= htons(port
->actor_oper_port_key
);
792 lacpdu
->actor_port_priority
= htons(port
->actor_port_priority
);
793 lacpdu
->actor_port
= htons(port
->actor_port_number
);
794 lacpdu
->actor_state
= port
->actor_oper_port_state
;
796 /* lacpdu->reserved_3_1 initialized
797 * lacpdu->tlv_type_partner_info initialized
798 * lacpdu->partner_information_length initialized
801 lacpdu
->partner_system_priority
= htons(partner
->system_priority
);
802 lacpdu
->partner_system
= partner
->system
;
803 lacpdu
->partner_key
= htons(partner
->key
);
804 lacpdu
->partner_port_priority
= htons(partner
->port_priority
);
805 lacpdu
->partner_port
= htons(partner
->port_number
);
806 lacpdu
->partner_state
= partner
->port_state
;
808 /* lacpdu->reserved_3_2 initialized
809 * lacpdu->tlv_type_collector_info initialized
810 * lacpdu->collector_information_length initialized
811 * collector_max_delay initialized
812 * reserved_12[12] initialized
813 * tlv_type_terminator initialized
814 * terminator_length initialized
815 * reserved_50[50] initialized
819 //////////////////////////////////////////////////////////////////////////////////////
820 // ================= main 802.3ad protocol code ======================================
821 //////////////////////////////////////////////////////////////////////////////////////
824 * ad_lacpdu_send - send out a lacpdu packet on a given port
825 * @port: the port we're looking at
827 * Returns: 0 on success
830 static int ad_lacpdu_send(struct port
*port
)
832 struct slave
*slave
= port
->slave
;
834 struct lacpdu_header
*lacpdu_header
;
835 int length
= sizeof(struct lacpdu_header
);
837 skb
= dev_alloc_skb(length
);
842 skb
->dev
= slave
->dev
;
843 skb_reset_mac_header(skb
);
844 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
845 skb
->protocol
= PKT_TYPE_LACPDU
;
846 skb
->priority
= TC_PRIO_CONTROL
;
848 lacpdu_header
= (struct lacpdu_header
*)skb_put(skb
, length
);
850 memcpy(lacpdu_header
->hdr
.h_dest
, lacpdu_mcast_addr
, ETH_ALEN
);
851 /* Note: source addres is set to be the member's PERMANENT address,
852 because we use it to identify loopback lacpdus in receive. */
853 memcpy(lacpdu_header
->hdr
.h_source
, slave
->perm_hwaddr
, ETH_ALEN
);
854 lacpdu_header
->hdr
.h_proto
= PKT_TYPE_LACPDU
;
856 lacpdu_header
->lacpdu
= port
->lacpdu
; // struct copy
864 * ad_marker_send - send marker information/response on a given port
865 * @port: the port we're looking at
866 * @marker: marker data to send
868 * Returns: 0 on success
871 static int ad_marker_send(struct port
*port
, struct bond_marker
*marker
)
873 struct slave
*slave
= port
->slave
;
875 struct bond_marker_header
*marker_header
;
876 int length
= sizeof(struct bond_marker_header
);
878 skb
= dev_alloc_skb(length
+ 16);
883 skb_reserve(skb
, 16);
885 skb
->dev
= slave
->dev
;
886 skb_reset_mac_header(skb
);
887 skb
->network_header
= skb
->mac_header
+ ETH_HLEN
;
888 skb
->protocol
= PKT_TYPE_LACPDU
;
890 marker_header
= (struct bond_marker_header
*)skb_put(skb
, length
);
892 memcpy(marker_header
->hdr
.h_dest
, lacpdu_mcast_addr
, ETH_ALEN
);
893 /* Note: source addres is set to be the member's PERMANENT address,
894 because we use it to identify loopback MARKERs in receive. */
895 memcpy(marker_header
->hdr
.h_source
, slave
->perm_hwaddr
, ETH_ALEN
);
896 marker_header
->hdr
.h_proto
= PKT_TYPE_LACPDU
;
898 marker_header
->marker
= *marker
; // struct copy
906 * ad_mux_machine - handle a port's mux state machine
907 * @port: the port we're looking at
910 static void ad_mux_machine(struct port
*port
)
912 mux_states_t last_state
;
914 // keep current State Machine state to compare later if it was changed
915 last_state
= port
->sm_mux_state
;
917 if (port
->sm_vars
& AD_PORT_BEGIN
) {
918 port
->sm_mux_state
= AD_MUX_DETACHED
; // next state
920 switch (port
->sm_mux_state
) {
921 case AD_MUX_DETACHED
:
922 if ((port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
)) { // if SELECTED or STANDBY
923 port
->sm_mux_state
= AD_MUX_WAITING
; // next state
927 // if SELECTED == FALSE return to DETACH state
928 if (!(port
->sm_vars
& AD_PORT_SELECTED
)) { // if UNSELECTED
929 port
->sm_vars
&= ~AD_PORT_READY_N
;
930 // in order to withhold the Selection Logic to check all ports READY_N value
931 // every callback cycle to update ready variable, we check READY_N and update READY here
932 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
933 port
->sm_mux_state
= AD_MUX_DETACHED
; // next state
937 // check if the wait_while_timer expired
938 if (port
->sm_mux_timer_counter
&& !(--port
->sm_mux_timer_counter
)) {
939 port
->sm_vars
|= AD_PORT_READY_N
;
942 // in order to withhold the selection logic to check all ports READY_N value
943 // every callback cycle to update ready variable, we check READY_N and update READY here
944 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
946 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
947 if ((port
->sm_vars
& AD_PORT_READY
) && !port
->sm_mux_timer_counter
) {
948 port
->sm_mux_state
= AD_MUX_ATTACHED
; // next state
951 case AD_MUX_ATTACHED
:
952 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
953 if ((port
->sm_vars
& AD_PORT_SELECTED
) && (port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
) && !__check_agg_selection_timer(port
)) {
954 port
->sm_mux_state
= AD_MUX_COLLECTING_DISTRIBUTING
;// next state
955 } else if (!(port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
)) { // if UNSELECTED or STANDBY
956 port
->sm_vars
&= ~AD_PORT_READY_N
;
957 // in order to withhold the selection logic to check all ports READY_N value
958 // every callback cycle to update ready variable, we check READY_N and update READY here
959 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
960 port
->sm_mux_state
= AD_MUX_DETACHED
;// next state
963 case AD_MUX_COLLECTING_DISTRIBUTING
:
964 if (!(port
->sm_vars
& AD_PORT_SELECTED
) || (port
->sm_vars
& AD_PORT_STANDBY
) ||
965 !(port
->partner_oper
.port_state
& AD_STATE_SYNCHRONIZATION
)
967 port
->sm_mux_state
= AD_MUX_ATTACHED
;// next state
970 // if port state hasn't changed make
971 // sure that a collecting distributing
972 // port in an active aggregator is enabled
973 if (port
->aggregator
&&
974 port
->aggregator
->is_active
&&
975 !__port_is_enabled(port
)) {
981 default: //to silence the compiler
986 // check if the state machine was changed
987 if (port
->sm_mux_state
!= last_state
) {
988 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
989 port
->actor_port_number
, last_state
,
991 switch (port
->sm_mux_state
) {
992 case AD_MUX_DETACHED
:
993 __detach_bond_from_agg(port
);
994 port
->actor_oper_port_state
&= ~AD_STATE_SYNCHRONIZATION
;
995 ad_disable_collecting_distributing(port
);
996 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
997 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
1000 case AD_MUX_WAITING
:
1001 port
->sm_mux_timer_counter
= __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER
, 0);
1003 case AD_MUX_ATTACHED
:
1004 __attach_bond_to_agg(port
);
1005 port
->actor_oper_port_state
|= AD_STATE_SYNCHRONIZATION
;
1006 port
->actor_oper_port_state
&= ~AD_STATE_COLLECTING
;
1007 port
->actor_oper_port_state
&= ~AD_STATE_DISTRIBUTING
;
1008 ad_disable_collecting_distributing(port
);
1011 case AD_MUX_COLLECTING_DISTRIBUTING
:
1012 port
->actor_oper_port_state
|= AD_STATE_COLLECTING
;
1013 port
->actor_oper_port_state
|= AD_STATE_DISTRIBUTING
;
1014 ad_enable_collecting_distributing(port
);
1017 default: //to silence the compiler
1024 * ad_rx_machine - handle a port's rx State Machine
1025 * @lacpdu: the lacpdu we've received
1026 * @port: the port we're looking at
1028 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1029 * CURRENT. If timer expired set the state machine in the proper state.
1030 * In other cases, this function checks if we need to switch to other state.
1032 static void ad_rx_machine(struct lacpdu
*lacpdu
, struct port
*port
)
1034 rx_states_t last_state
;
1036 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1037 __get_rx_machine_lock(port
);
1039 // keep current State Machine state to compare later if it was changed
1040 last_state
= port
->sm_rx_state
;
1042 // check if state machine should change state
1043 // first, check if port was reinitialized
1044 if (port
->sm_vars
& AD_PORT_BEGIN
) {
1045 port
->sm_rx_state
= AD_RX_INITIALIZE
; // next state
1047 // check if port is not enabled
1048 else if (!(port
->sm_vars
& AD_PORT_BEGIN
) && !port
->is_enabled
&& !(port
->sm_vars
& AD_PORT_MOVED
)) {
1049 port
->sm_rx_state
= AD_RX_PORT_DISABLED
; // next state
1051 // check if new lacpdu arrived
1052 else if (lacpdu
&& ((port
->sm_rx_state
== AD_RX_EXPIRED
) || (port
->sm_rx_state
== AD_RX_DEFAULTED
) || (port
->sm_rx_state
== AD_RX_CURRENT
))) {
1053 port
->sm_rx_timer_counter
= 0; // zero timer
1054 port
->sm_rx_state
= AD_RX_CURRENT
;
1056 // if timer is on, and if it is expired
1057 if (port
->sm_rx_timer_counter
&& !(--port
->sm_rx_timer_counter
)) {
1058 switch (port
->sm_rx_state
) {
1060 port
->sm_rx_state
= AD_RX_DEFAULTED
; // next state
1063 port
->sm_rx_state
= AD_RX_EXPIRED
; // next state
1065 default: //to silence the compiler
1069 // if no lacpdu arrived and no timer is on
1070 switch (port
->sm_rx_state
) {
1071 case AD_RX_PORT_DISABLED
:
1072 if (port
->sm_vars
& AD_PORT_MOVED
) {
1073 port
->sm_rx_state
= AD_RX_INITIALIZE
; // next state
1074 } else if (port
->is_enabled
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1075 port
->sm_rx_state
= AD_RX_EXPIRED
; // next state
1076 } else if (port
->is_enabled
&& ((port
->sm_vars
& AD_PORT_LACP_ENABLED
) == 0)) {
1077 port
->sm_rx_state
= AD_RX_LACP_DISABLED
; // next state
1080 default: //to silence the compiler
1087 // check if the State machine was changed or new lacpdu arrived
1088 if ((port
->sm_rx_state
!= last_state
) || (lacpdu
)) {
1089 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1090 port
->actor_port_number
, last_state
,
1092 switch (port
->sm_rx_state
) {
1093 case AD_RX_INITIALIZE
:
1094 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
)) {
1095 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1097 port
->sm_vars
|= AD_PORT_LACP_ENABLED
;
1099 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1100 __record_default(port
);
1101 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1102 port
->sm_vars
&= ~AD_PORT_MOVED
;
1103 port
->sm_rx_state
= AD_RX_PORT_DISABLED
; // next state
1105 /*- Fall Through -*/
1107 case AD_RX_PORT_DISABLED
:
1108 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1110 case AD_RX_LACP_DISABLED
:
1111 port
->sm_vars
&= ~AD_PORT_SELECTED
;
1112 __record_default(port
);
1113 port
->partner_oper
.port_state
&= ~AD_STATE_AGGREGATION
;
1114 port
->sm_vars
|= AD_PORT_MATCHED
;
1115 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1118 //Reset of the Synchronization flag. (Standard 43.4.12)
1119 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1120 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1121 port
->partner_oper
.port_state
&= ~AD_STATE_SYNCHRONIZATION
;
1122 port
->sm_vars
&= ~AD_PORT_MATCHED
;
1123 port
->partner_oper
.port_state
|=
1124 AD_STATE_LACP_ACTIVITY
;
1125 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(AD_SHORT_TIMEOUT
));
1126 port
->actor_oper_port_state
|= AD_STATE_EXPIRED
;
1128 case AD_RX_DEFAULTED
:
1129 __update_default_selected(port
);
1130 __record_default(port
);
1131 port
->sm_vars
|= AD_PORT_MATCHED
;
1132 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1135 // detect loopback situation
1136 if (!MAC_ADDRESS_COMPARE(&(lacpdu
->actor_system
), &(port
->actor_system
))) {
1137 // INFO_RECEIVED_LOOPBACK_FRAMES
1138 pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
1139 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1140 port
->slave
->dev
->master
->name
, port
->slave
->dev
->name
);
1141 __release_rx_machine_lock(port
);
1144 __update_selected(lacpdu
, port
);
1145 __update_ntt(lacpdu
, port
);
1146 __record_pdu(lacpdu
, port
);
1147 port
->sm_rx_timer_counter
= __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER
, (u16
)(port
->actor_oper_port_state
& AD_STATE_LACP_TIMEOUT
));
1148 port
->actor_oper_port_state
&= ~AD_STATE_EXPIRED
;
1149 // verify that if the aggregator is enabled, the port is enabled too.
1150 //(because if the link goes down for a short time, the 802.3ad will not
1151 // catch it, and the port will continue to be disabled)
1152 if (port
->aggregator
&& port
->aggregator
->is_active
&& !__port_is_enabled(port
)) {
1153 __enable_port(port
);
1156 default: //to silence the compiler
1160 __release_rx_machine_lock(port
);
1164 * ad_tx_machine - handle a port's tx state machine
1165 * @port: the port we're looking at
1168 static void ad_tx_machine(struct port
*port
)
1170 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1171 if (port
->sm_tx_timer_counter
&& !(--port
->sm_tx_timer_counter
)) {
1172 // check if there is something to send
1173 if (port
->ntt
&& (port
->sm_vars
& AD_PORT_LACP_ENABLED
)) {
1174 __update_lacpdu_from_port(port
);
1176 if (ad_lacpdu_send(port
) >= 0) {
1177 pr_debug("Sent LACPDU on port %d\n",
1178 port
->actor_port_number
);
1180 /* mark ntt as false, so it will not be sent again until
1185 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1186 port
->sm_tx_timer_counter
=ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1191 * ad_periodic_machine - handle a port's periodic state machine
1192 * @port: the port we're looking at
1194 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1196 static void ad_periodic_machine(struct port
*port
)
1198 periodic_states_t last_state
;
1200 // keep current state machine state to compare later if it was changed
1201 last_state
= port
->sm_periodic_state
;
1203 // check if port was reinitialized
1204 if (((port
->sm_vars
& AD_PORT_BEGIN
) || !(port
->sm_vars
& AD_PORT_LACP_ENABLED
) || !port
->is_enabled
) ||
1205 (!(port
->actor_oper_port_state
& AD_STATE_LACP_ACTIVITY
) && !(port
->partner_oper
.port_state
& AD_STATE_LACP_ACTIVITY
))
1207 port
->sm_periodic_state
= AD_NO_PERIODIC
; // next state
1209 // check if state machine should change state
1210 else if (port
->sm_periodic_timer_counter
) {
1211 // check if periodic state machine expired
1212 if (!(--port
->sm_periodic_timer_counter
)) {
1213 // if expired then do tx
1214 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1216 // If not expired, check if there is some new timeout parameter from the partner state
1217 switch (port
->sm_periodic_state
) {
1218 case AD_FAST_PERIODIC
:
1219 if (!(port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1220 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1223 case AD_SLOW_PERIODIC
:
1224 if ((port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1225 // stop current timer
1226 port
->sm_periodic_timer_counter
= 0;
1227 port
->sm_periodic_state
= AD_PERIODIC_TX
; // next state
1230 default: //to silence the compiler
1235 switch (port
->sm_periodic_state
) {
1236 case AD_NO_PERIODIC
:
1237 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1239 case AD_PERIODIC_TX
:
1240 if (!(port
->partner_oper
.port_state
& AD_STATE_LACP_TIMEOUT
)) {
1241 port
->sm_periodic_state
= AD_SLOW_PERIODIC
; // next state
1243 port
->sm_periodic_state
= AD_FAST_PERIODIC
; // next state
1246 default: //to silence the compiler
1251 // check if the state machine was changed
1252 if (port
->sm_periodic_state
!= last_state
) {
1253 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1254 port
->actor_port_number
, last_state
,
1255 port
->sm_periodic_state
);
1256 switch (port
->sm_periodic_state
) {
1257 case AD_NO_PERIODIC
:
1258 port
->sm_periodic_timer_counter
= 0; // zero timer
1260 case AD_FAST_PERIODIC
:
1261 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
1263 case AD_SLOW_PERIODIC
:
1264 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
1266 case AD_PERIODIC_TX
:
1269 default: //to silence the compiler
1276 * ad_port_selection_logic - select aggregation groups
1277 * @port: the port we're looking at
1279 * Select aggregation groups, and assign each port for it's aggregetor. The
1280 * selection logic is called in the inititalization (after all the handshkes),
1281 * and after every lacpdu receive (if selected is off).
1283 static void ad_port_selection_logic(struct port
*port
)
1285 struct aggregator
*aggregator
, *free_aggregator
= NULL
, *temp_aggregator
;
1286 struct port
*last_port
= NULL
, *curr_port
;
1289 // if the port is already Selected, do nothing
1290 if (port
->sm_vars
& AD_PORT_SELECTED
) {
1294 // if the port is connected to other aggregator, detach it
1295 if (port
->aggregator
) {
1296 // detach the port from its former aggregator
1297 temp_aggregator
=port
->aggregator
;
1298 for (curr_port
=temp_aggregator
->lag_ports
; curr_port
; last_port
=curr_port
, curr_port
=curr_port
->next_port_in_aggregator
) {
1299 if (curr_port
== port
) {
1300 temp_aggregator
->num_of_ports
--;
1301 if (!last_port
) {// if it is the first port attached to the aggregator
1302 temp_aggregator
->lag_ports
=port
->next_port_in_aggregator
;
1303 } else {// not the first port attached to the aggregator
1304 last_port
->next_port_in_aggregator
=port
->next_port_in_aggregator
;
1307 // clear the port's relations to this aggregator
1308 port
->aggregator
= NULL
;
1309 port
->next_port_in_aggregator
=NULL
;
1310 port
->actor_port_aggregator_identifier
=0;
1312 pr_debug("Port %d left LAG %d\n",
1313 port
->actor_port_number
,
1314 temp_aggregator
->aggregator_identifier
);
1315 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1316 if (!temp_aggregator
->lag_ports
) {
1317 ad_clear_agg(temp_aggregator
);
1322 if (!curr_port
) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1323 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1324 port
->slave
->dev
->master
->name
,
1325 port
->actor_port_number
,
1326 port
->slave
->dev
->name
,
1327 port
->aggregator
->aggregator_identifier
);
1330 // search on all aggregators for a suitable aggregator for this port
1331 for (aggregator
= __get_first_agg(port
); aggregator
;
1332 aggregator
= __get_next_agg(aggregator
)) {
1334 // keep a free aggregator for later use(if needed)
1335 if (!aggregator
->lag_ports
) {
1336 if (!free_aggregator
) {
1337 free_aggregator
=aggregator
;
1341 // check if current aggregator suits us
1342 if (((aggregator
->actor_oper_aggregator_key
== port
->actor_oper_port_key
) && // if all parameters match AND
1343 !MAC_ADDRESS_COMPARE(&(aggregator
->partner_system
), &(port
->partner_oper
.system
)) &&
1344 (aggregator
->partner_system_priority
== port
->partner_oper
.system_priority
) &&
1345 (aggregator
->partner_oper_aggregator_key
== port
->partner_oper
.key
)
1347 ((MAC_ADDRESS_COMPARE(&(port
->partner_oper
.system
), &(null_mac_addr
)) && // partner answers
1348 !aggregator
->is_individual
) // but is not individual OR
1351 // attach to the founded aggregator
1352 port
->aggregator
= aggregator
;
1353 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1354 port
->next_port_in_aggregator
=aggregator
->lag_ports
;
1355 port
->aggregator
->num_of_ports
++;
1356 aggregator
->lag_ports
=port
;
1357 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1358 port
->actor_port_number
,
1359 port
->aggregator
->aggregator_identifier
);
1361 // mark this port as selected
1362 port
->sm_vars
|= AD_PORT_SELECTED
;
1368 // the port couldn't find an aggregator - attach it to a new aggregator
1370 if (free_aggregator
) {
1371 // assign port a new aggregator
1372 port
->aggregator
= free_aggregator
;
1373 port
->actor_port_aggregator_identifier
=port
->aggregator
->aggregator_identifier
;
1375 // update the new aggregator's parameters
1376 // if port was responsed from the end-user
1377 if (port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
) {// if port is full duplex
1378 port
->aggregator
->is_individual
= false;
1380 port
->aggregator
->is_individual
= true;
1383 port
->aggregator
->actor_admin_aggregator_key
= port
->actor_admin_port_key
;
1384 port
->aggregator
->actor_oper_aggregator_key
= port
->actor_oper_port_key
;
1385 port
->aggregator
->partner_system
=port
->partner_oper
.system
;
1386 port
->aggregator
->partner_system_priority
= port
->partner_oper
.system_priority
;
1387 port
->aggregator
->partner_oper_aggregator_key
= port
->partner_oper
.key
;
1388 port
->aggregator
->receive_state
= 1;
1389 port
->aggregator
->transmit_state
= 1;
1390 port
->aggregator
->lag_ports
= port
;
1391 port
->aggregator
->num_of_ports
++;
1393 // mark this port as selected
1394 port
->sm_vars
|= AD_PORT_SELECTED
;
1396 pr_debug("Port %d joined LAG %d(new LAG)\n",
1397 port
->actor_port_number
,
1398 port
->aggregator
->aggregator_identifier
);
1400 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
1401 port
->slave
->dev
->master
->name
,
1402 port
->actor_port_number
, port
->slave
->dev
->name
);
1405 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1406 // else set ready=FALSE in all aggregator's ports
1407 __set_agg_ports_ready(port
->aggregator
, __agg_ports_are_ready(port
->aggregator
));
1409 aggregator
= __get_first_agg(port
);
1410 ad_agg_selection_logic(aggregator
);
1414 * Decide if "agg" is a better choice for the new active aggregator that
1415 * the current best, according to the ad_select policy.
1417 static struct aggregator
*ad_agg_selection_test(struct aggregator
*best
,
1418 struct aggregator
*curr
)
1421 * 0. If no best, select current.
1423 * 1. If the current agg is not individual, and the best is
1424 * individual, select current.
1426 * 2. If current agg is individual and the best is not, keep best.
1428 * 3. Therefore, current and best are both individual or both not
1431 * 3a. If current agg partner replied, and best agg partner did not,
1434 * 3b. If current agg partner did not reply and best agg partner
1435 * did reply, keep best.
1437 * 4. Therefore, current and best both have partner replies or
1438 * both do not, so perform selection policy:
1440 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1441 * select by bandwidth.
1443 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1448 if (!curr
->is_individual
&& best
->is_individual
)
1451 if (curr
->is_individual
&& !best
->is_individual
)
1454 if (__agg_has_partner(curr
) && !__agg_has_partner(best
))
1457 if (!__agg_has_partner(curr
) && __agg_has_partner(best
))
1460 switch (__get_agg_selection_mode(curr
->lag_ports
)) {
1462 if (curr
->num_of_ports
> best
->num_of_ports
)
1465 if (curr
->num_of_ports
< best
->num_of_ports
)
1469 case BOND_AD_STABLE
:
1470 case BOND_AD_BANDWIDTH
:
1471 if (__get_agg_bandwidth(curr
) > __get_agg_bandwidth(best
))
1477 pr_warning("%s: Impossible agg select mode %d\n",
1478 curr
->slave
->dev
->master
->name
,
1479 __get_agg_selection_mode(curr
->lag_ports
));
1486 static int agg_device_up(const struct aggregator
*agg
)
1488 return (netif_running(agg
->slave
->dev
) &&
1489 netif_carrier_ok(agg
->slave
->dev
));
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
;
1523 active
= __get_active_agg(agg
);
1524 best
= (active
&& agg_device_up(active
)) ? active
: NULL
;
1529 if (agg
->num_of_ports
&& agg_device_up(agg
))
1530 best
= ad_agg_selection_test(best
, agg
);
1532 } while ((agg
= __get_next_agg(agg
)));
1535 __get_agg_selection_mode(best
->lag_ports
) == BOND_AD_STABLE
) {
1537 * For the STABLE policy, don't replace the old active
1538 * aggregator if it's still active (it has an answering
1539 * partner) or if both the best and active don't have an
1540 * answering partner.
1542 if (active
&& active
->lag_ports
&&
1543 active
->lag_ports
->is_enabled
&&
1544 (__agg_has_partner(active
) ||
1545 (!__agg_has_partner(active
) && !__agg_has_partner(best
)))) {
1546 if (!(!active
->actor_oper_aggregator_key
&&
1547 best
->actor_oper_aggregator_key
)) {
1549 active
->is_active
= 1;
1554 if (best
&& (best
== active
)) {
1556 active
->is_active
= 1;
1559 // if there is new best aggregator, activate it
1561 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1562 best
->aggregator_identifier
, best
->num_of_ports
,
1563 best
->actor_oper_aggregator_key
,
1564 best
->partner_oper_aggregator_key
,
1565 best
->is_individual
, best
->is_active
);
1566 pr_debug("best ports %p slave %p %s\n",
1567 best
->lag_ports
, best
->slave
,
1568 best
->slave
? best
->slave
->dev
->name
: "NULL");
1570 for (agg
= __get_first_agg(best
->lag_ports
); agg
;
1571 agg
= __get_next_agg(agg
)) {
1573 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1574 agg
->aggregator_identifier
, agg
->num_of_ports
,
1575 agg
->actor_oper_aggregator_key
,
1576 agg
->partner_oper_aggregator_key
,
1577 agg
->is_individual
, agg
->is_active
);
1580 // check if any partner replys
1581 if (best
->is_individual
) {
1582 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1583 best
->slave
? best
->slave
->dev
->master
->name
: "NULL");
1586 best
->is_active
= 1;
1587 pr_debug("LAG %d chosen as the active LAG\n",
1588 best
->aggregator_identifier
);
1589 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1590 best
->aggregator_identifier
, best
->num_of_ports
,
1591 best
->actor_oper_aggregator_key
,
1592 best
->partner_oper_aggregator_key
,
1593 best
->is_individual
, best
->is_active
);
1595 // disable the ports that were related to the former active_aggregator
1597 for (port
= active
->lag_ports
; port
;
1598 port
= port
->next_port_in_aggregator
) {
1599 __disable_port(port
);
1605 * if the selected aggregator is of join individuals
1606 * (partner_system is NULL), enable their ports
1608 active
= __get_active_agg(origin
);
1611 if (!__agg_has_partner(active
)) {
1612 for (port
= active
->lag_ports
; port
;
1613 port
= port
->next_port_in_aggregator
) {
1614 __enable_port(port
);
1619 if (origin
->slave
) {
1620 struct bonding
*bond
;
1622 bond
= bond_get_bond_by_slave(origin
->slave
);
1624 bond_3ad_set_carrier(bond
);
1629 * ad_clear_agg - clear a given aggregator's parameters
1630 * @aggregator: the aggregator we're looking at
1633 static void ad_clear_agg(struct aggregator
*aggregator
)
1636 aggregator
->is_individual
= false;
1637 aggregator
->actor_admin_aggregator_key
= 0;
1638 aggregator
->actor_oper_aggregator_key
= 0;
1639 aggregator
->partner_system
= null_mac_addr
;
1640 aggregator
->partner_system_priority
= 0;
1641 aggregator
->partner_oper_aggregator_key
= 0;
1642 aggregator
->receive_state
= 0;
1643 aggregator
->transmit_state
= 0;
1644 aggregator
->lag_ports
= NULL
;
1645 aggregator
->is_active
= 0;
1646 aggregator
->num_of_ports
= 0;
1647 pr_debug("LAG %d was cleared\n",
1648 aggregator
->aggregator_identifier
);
1653 * ad_initialize_agg - initialize a given aggregator's parameters
1654 * @aggregator: the aggregator we're looking at
1657 static void ad_initialize_agg(struct aggregator
*aggregator
)
1660 ad_clear_agg(aggregator
);
1662 aggregator
->aggregator_mac_address
= null_mac_addr
;
1663 aggregator
->aggregator_identifier
= 0;
1664 aggregator
->slave
= NULL
;
1669 * ad_initialize_port - initialize a given port's parameters
1670 * @aggregator: the aggregator we're looking at
1671 * @lacp_fast: boolean. whether fast periodic should be used
1674 static void ad_initialize_port(struct port
*port
, int lacp_fast
)
1676 static const struct port_params tmpl
= {
1677 .system_priority
= 0xffff,
1680 .port_priority
= 0xff,
1683 static const struct lacpdu lacpdu
= {
1685 .version_number
= 0x01,
1686 .tlv_type_actor_info
= 0x01,
1687 .actor_information_length
= 0x14,
1688 .tlv_type_partner_info
= 0x02,
1689 .partner_information_length
= 0x14,
1690 .tlv_type_collector_info
= 0x03,
1691 .collector_information_length
= 0x10,
1692 .collector_max_delay
= htons(AD_COLLECTOR_MAX_DELAY
),
1696 port
->actor_port_number
= 1;
1697 port
->actor_port_priority
= 0xff;
1698 port
->actor_system
= null_mac_addr
;
1699 port
->actor_system_priority
= 0xffff;
1700 port
->actor_port_aggregator_identifier
= 0;
1702 port
->actor_admin_port_key
= 1;
1703 port
->actor_oper_port_key
= 1;
1704 port
->actor_admin_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1705 port
->actor_oper_port_state
= AD_STATE_AGGREGATION
| AD_STATE_LACP_ACTIVITY
;
1708 port
->actor_oper_port_state
|= AD_STATE_LACP_TIMEOUT
;
1711 memcpy(&port
->partner_admin
, &tmpl
, sizeof(tmpl
));
1712 memcpy(&port
->partner_oper
, &tmpl
, sizeof(tmpl
));
1714 port
->is_enabled
= true;
1715 // ****** private parameters ******
1716 port
->sm_vars
= 0x3;
1717 port
->sm_rx_state
= 0;
1718 port
->sm_rx_timer_counter
= 0;
1719 port
->sm_periodic_state
= 0;
1720 port
->sm_periodic_timer_counter
= 0;
1721 port
->sm_mux_state
= 0;
1722 port
->sm_mux_timer_counter
= 0;
1723 port
->sm_tx_state
= 0;
1724 port
->sm_tx_timer_counter
= 0;
1726 port
->aggregator
= NULL
;
1727 port
->next_port_in_aggregator
= NULL
;
1728 port
->transaction_id
= 0;
1730 memcpy(&port
->lacpdu
, &lacpdu
, sizeof(lacpdu
));
1735 * ad_enable_collecting_distributing - enable a port's transmit/receive
1736 * @port: the port we're looking at
1738 * Enable @port if it's in an active aggregator
1740 static void ad_enable_collecting_distributing(struct port
*port
)
1742 if (port
->aggregator
->is_active
) {
1743 pr_debug("Enabling port %d(LAG %d)\n",
1744 port
->actor_port_number
,
1745 port
->aggregator
->aggregator_identifier
);
1746 __enable_port(port
);
1751 * ad_disable_collecting_distributing - disable a port's transmit/receive
1752 * @port: the port we're looking at
1755 static void ad_disable_collecting_distributing(struct port
*port
)
1757 if (port
->aggregator
&& MAC_ADDRESS_COMPARE(&(port
->aggregator
->partner_system
), &(null_mac_addr
))) {
1758 pr_debug("Disabling port %d(LAG %d)\n",
1759 port
->actor_port_number
,
1760 port
->aggregator
->aggregator_identifier
);
1761 __disable_port(port
);
1767 * ad_marker_info_send - send a marker information frame
1768 * @port: the port we're looking at
1770 * This function does nothing since we decided not to implement send and handle
1771 * response for marker PDU's, in this stage, but only to respond to marker
1774 static void ad_marker_info_send(struct port
*port
)
1776 struct bond_marker marker
;
1779 // fill the marker PDU with the appropriate values
1780 marker
.subtype
= 0x02;
1781 marker
.version_number
= 0x01;
1782 marker
.tlv_type
= AD_MARKER_INFORMATION_SUBTYPE
;
1783 marker
.marker_length
= 0x16;
1784 // convert requester_port to Big Endian
1785 marker
.requester_port
= (((port
->actor_port_number
& 0xFF) << 8) |((u16
)(port
->actor_port_number
& 0xFF00) >> 8));
1786 marker
.requester_system
= port
->actor_system
;
1787 // convert requester_port(u32) to Big Endian
1788 marker
.requester_transaction_id
= (((++port
->transaction_id
& 0xFF) << 24) |((port
->transaction_id
& 0xFF00) << 8) |((port
->transaction_id
& 0xFF0000) >> 8) |((port
->transaction_id
& 0xFF000000) >> 24));
1790 marker
.tlv_type_terminator
= 0x00;
1791 marker
.terminator_length
= 0x00;
1792 for (index
=0; index
<90; index
++) {
1793 marker
.reserved_90
[index
]=0;
1796 // send the marker information
1797 if (ad_marker_send(port
, &marker
) >= 0) {
1798 pr_debug("Sent Marker Information on port %d\n",
1799 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",
1824 port
->actor_port_number
);
1829 * ad_marker_response_received - handle receive of a marker response frame
1830 * @marker: marker PDU received
1831 * @port: the port we're looking at
1833 * This function does nothing since we decided not to implement send and handle
1834 * response for marker PDU's, in this stage, but only to respond to marker
1837 static void ad_marker_response_received(struct bond_marker
*marker
,
1840 marker
=NULL
; // just to satisfy the compiler
1841 port
=NULL
; // just to satisfy the compiler
1842 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1845 //////////////////////////////////////////////////////////////////////////////////////
1846 // ================= AD exported functions to the main bonding code ==================
1847 //////////////////////////////////////////////////////////////////////////////////////
1849 // Check aggregators status in team every T seconds
1850 #define AD_AGGREGATOR_SELECTION_TIMER 8
1853 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1855 * Set the aggregation selection timer, to initiate an agg selection in
1856 * the very near future. Called during first initialization, and during
1857 * any down to up transitions of the bond.
1859 void bond_3ad_initiate_agg_selection(struct bonding
*bond
, int timeout
)
1861 BOND_AD_INFO(bond
).agg_select_timer
= timeout
;
1862 BOND_AD_INFO(bond
).agg_select_mode
= bond
->params
.ad_select
;
1865 static u16 aggregator_identifier
;
1868 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1869 * @bond: bonding struct to work on
1870 * @tick_resolution: tick duration (millisecond resolution)
1871 * @lacp_fast: boolean. whether fast periodic should be used
1873 * Can be called only after the mac address of the bond is set.
1875 void bond_3ad_initialize(struct bonding
*bond
, u16 tick_resolution
, int lacp_fast
)
1877 // check that the bond is not initialized yet
1878 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond
).system
.sys_mac_addr
),
1879 bond
->dev
->dev_addr
)) {
1881 aggregator_identifier
= 0;
1883 BOND_AD_INFO(bond
).lacp_fast
= lacp_fast
;
1884 BOND_AD_INFO(bond
).system
.sys_priority
= 0xFFFF;
1885 BOND_AD_INFO(bond
).system
.sys_mac_addr
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1887 // initialize how many times this module is called in one second(should be about every 100ms)
1888 ad_ticks_per_sec
= tick_resolution
;
1890 bond_3ad_initiate_agg_selection(bond
,
1891 AD_AGGREGATOR_SELECTION_TIMER
*
1897 * bond_3ad_bind_slave - initialize a slave's port
1898 * @slave: slave struct to work on
1900 * Returns: 0 on success
1903 int bond_3ad_bind_slave(struct slave
*slave
)
1905 struct bonding
*bond
= bond_get_bond_by_slave(slave
);
1907 struct aggregator
*aggregator
;
1910 pr_err("%s: The slave %s is not attached to its bond\n",
1911 slave
->dev
->master
->name
, slave
->dev
->name
);
1915 //check that the slave has not been intialized yet.
1916 if (SLAVE_AD_INFO(slave
).port
.slave
!= slave
) {
1918 // port initialization
1919 port
= &(SLAVE_AD_INFO(slave
).port
);
1921 ad_initialize_port(port
, BOND_AD_INFO(bond
).lacp_fast
);
1923 port
->slave
= slave
;
1924 port
->actor_port_number
= SLAVE_AD_INFO(slave
).id
;
1925 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1926 // ------------------------------------------------------------
1927 // Port key : | User key | Speed |Duplex|
1928 // ------------------------------------------------------------
1930 port
->actor_admin_port_key
= 0; // initialize this parameter
1931 port
->actor_admin_port_key
|= __get_duplex(port
);
1932 port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
1933 port
->actor_oper_port_key
= port
->actor_admin_port_key
;
1934 // if the port is not full duplex, then the port should be not lacp Enabled
1935 if (!(port
->actor_oper_port_key
& AD_DUPLEX_KEY_BITS
)) {
1936 port
->sm_vars
&= ~AD_PORT_LACP_ENABLED
;
1938 // actor system is the bond's system
1939 port
->actor_system
= BOND_AD_INFO(bond
).system
.sys_mac_addr
;
1940 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1941 port
->sm_tx_timer_counter
= ad_ticks_per_sec
/AD_MAX_TX_IN_SECOND
;
1942 port
->aggregator
= NULL
;
1943 port
->next_port_in_aggregator
= NULL
;
1945 __disable_port(port
);
1946 __initialize_port_locks(port
);
1949 // aggregator initialization
1950 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
1952 ad_initialize_agg(aggregator
);
1954 aggregator
->aggregator_mac_address
= *((struct mac_addr
*)bond
->dev
->dev_addr
);
1955 aggregator
->aggregator_identifier
= (++aggregator_identifier
);
1956 aggregator
->slave
= slave
;
1957 aggregator
->is_active
= 0;
1958 aggregator
->num_of_ports
= 0;
1965 * bond_3ad_unbind_slave - deinitialize a slave's port
1966 * @slave: slave struct to work on
1968 * Search for the aggregator that is related to this port, remove the
1969 * aggregator and assign another aggregator for other port related to it
1970 * (if any), and remove the port.
1972 void bond_3ad_unbind_slave(struct slave
*slave
)
1974 struct port
*port
, *prev_port
, *temp_port
;
1975 struct aggregator
*aggregator
, *new_aggregator
, *temp_aggregator
;
1976 int select_new_active_agg
= 0;
1978 // find the aggregator related to this slave
1979 aggregator
= &(SLAVE_AD_INFO(slave
).aggregator
);
1981 // find the port related to this slave
1982 port
= &(SLAVE_AD_INFO(slave
).port
);
1984 // if slave is null, the whole port is not initialized
1986 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
1987 slave
->dev
->master
->name
, slave
->dev
->name
);
1991 pr_debug("Unbinding Link Aggregation Group %d\n",
1992 aggregator
->aggregator_identifier
);
1994 /* Tell the partner that this port is not suitable for aggregation */
1995 port
->actor_oper_port_state
&= ~AD_STATE_AGGREGATION
;
1996 __update_lacpdu_from_port(port
);
1997 ad_lacpdu_send(port
);
1999 // check if this aggregator is occupied
2000 if (aggregator
->lag_ports
) {
2001 // check if there are other ports related to this aggregator except
2002 // the port related to this slave(thats ensure us that there is a
2003 // reason to search for new aggregator, and that we will find one
2004 if ((aggregator
->lag_ports
!= port
) || (aggregator
->lag_ports
->next_port_in_aggregator
)) {
2005 // find new aggregator for the related port(s)
2006 new_aggregator
= __get_first_agg(port
);
2007 for (; new_aggregator
; new_aggregator
= __get_next_agg(new_aggregator
)) {
2008 // if the new aggregator is empty, or it is connected to our port only
2009 if (!new_aggregator
->lag_ports
|| ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
)) {
2013 // if new aggregator found, copy the aggregator's parameters
2014 // and connect the related lag_ports to the new aggregator
2015 if ((new_aggregator
) && ((!new_aggregator
->lag_ports
) || ((new_aggregator
->lag_ports
== port
) && !new_aggregator
->lag_ports
->next_port_in_aggregator
))) {
2016 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
2017 aggregator
->aggregator_identifier
,
2018 new_aggregator
->aggregator_identifier
);
2020 if ((new_aggregator
->lag_ports
== port
) && new_aggregator
->is_active
) {
2021 pr_info("%s: Removing an active aggregator\n",
2022 aggregator
->slave
->dev
->master
->name
);
2023 // select new active aggregator
2024 select_new_active_agg
= 1;
2027 new_aggregator
->is_individual
= aggregator
->is_individual
;
2028 new_aggregator
->actor_admin_aggregator_key
= aggregator
->actor_admin_aggregator_key
;
2029 new_aggregator
->actor_oper_aggregator_key
= aggregator
->actor_oper_aggregator_key
;
2030 new_aggregator
->partner_system
= aggregator
->partner_system
;
2031 new_aggregator
->partner_system_priority
= aggregator
->partner_system_priority
;
2032 new_aggregator
->partner_oper_aggregator_key
= aggregator
->partner_oper_aggregator_key
;
2033 new_aggregator
->receive_state
= aggregator
->receive_state
;
2034 new_aggregator
->transmit_state
= aggregator
->transmit_state
;
2035 new_aggregator
->lag_ports
= aggregator
->lag_ports
;
2036 new_aggregator
->is_active
= aggregator
->is_active
;
2037 new_aggregator
->num_of_ports
= aggregator
->num_of_ports
;
2039 // update the information that is written on the ports about the aggregator
2040 for (temp_port
=aggregator
->lag_ports
; temp_port
; temp_port
=temp_port
->next_port_in_aggregator
) {
2041 temp_port
->aggregator
=new_aggregator
;
2042 temp_port
->actor_port_aggregator_identifier
= new_aggregator
->aggregator_identifier
;
2045 // clear the aggregator
2046 ad_clear_agg(aggregator
);
2048 if (select_new_active_agg
) {
2049 ad_agg_selection_logic(__get_first_agg(port
));
2052 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
2053 slave
->dev
->master
->name
);
2055 } else { // in case that the only port related to this aggregator is the one we want to remove
2056 select_new_active_agg
= aggregator
->is_active
;
2057 // clear the aggregator
2058 ad_clear_agg(aggregator
);
2059 if (select_new_active_agg
) {
2060 pr_info("%s: Removing an active aggregator\n",
2061 slave
->dev
->master
->name
);
2062 // select new active aggregator
2063 ad_agg_selection_logic(__get_first_agg(port
));
2068 pr_debug("Unbinding port %d\n", port
->actor_port_number
);
2069 // find the aggregator that this port is connected to
2070 temp_aggregator
= __get_first_agg(port
);
2071 for (; temp_aggregator
; temp_aggregator
= __get_next_agg(temp_aggregator
)) {
2073 // search the port in the aggregator's related ports
2074 for (temp_port
=temp_aggregator
->lag_ports
; temp_port
; prev_port
=temp_port
, temp_port
=temp_port
->next_port_in_aggregator
) {
2075 if (temp_port
== port
) { // the aggregator found - detach the port from this aggregator
2077 prev_port
->next_port_in_aggregator
= temp_port
->next_port_in_aggregator
;
2079 temp_aggregator
->lag_ports
= temp_port
->next_port_in_aggregator
;
2081 temp_aggregator
->num_of_ports
--;
2082 if (temp_aggregator
->num_of_ports
==0) {
2083 select_new_active_agg
= temp_aggregator
->is_active
;
2084 // clear the aggregator
2085 ad_clear_agg(temp_aggregator
);
2086 if (select_new_active_agg
) {
2087 pr_info("%s: Removing an active aggregator\n",
2088 slave
->dev
->master
->name
);
2089 // select new active aggregator
2090 ad_agg_selection_logic(__get_first_agg(port
));
2101 * bond_3ad_state_machine_handler - handle state machines timeout
2102 * @bond: bonding struct to work on
2104 * The state machine handling concept in this module is to check every tick
2105 * which state machine should operate any function. The execution order is
2106 * round robin, so when we have an interaction between state machines, the
2107 * reply of one to each other might be delayed until next tick.
2109 * This function also complete the initialization when the agg_select_timer
2110 * times out, and it selects an aggregator for the ports that are yet not
2111 * related to any aggregator, and selects the active aggregator for a bond.
2113 void bond_3ad_state_machine_handler(struct work_struct
*work
)
2115 struct bonding
*bond
= container_of(work
, struct bonding
,
2118 struct aggregator
*aggregator
;
2120 read_lock(&bond
->lock
);
2122 if (bond
->kill_timers
) {
2126 //check if there are any slaves
2127 if (bond
->slave_cnt
== 0) {
2131 // check if agg_select_timer timer after initialize is timed out
2132 if (BOND_AD_INFO(bond
).agg_select_timer
&& !(--BOND_AD_INFO(bond
).agg_select_timer
)) {
2133 // select the active aggregator for the bond
2134 if ((port
= __get_first_port(bond
))) {
2136 pr_warning("%s: Warning: bond's first port is uninitialized\n",
2141 aggregator
= __get_first_agg(port
);
2142 ad_agg_selection_logic(aggregator
);
2144 bond_3ad_set_carrier(bond
);
2147 // for each port run the state machines
2148 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2150 pr_warning("%s: Warning: Found an uninitialized port\n",
2155 ad_rx_machine(NULL
, port
);
2156 ad_periodic_machine(port
);
2157 ad_port_selection_logic(port
);
2158 ad_mux_machine(port
);
2159 ad_tx_machine(port
);
2161 // turn off the BEGIN bit, since we already handled it
2162 if (port
->sm_vars
& AD_PORT_BEGIN
) {
2163 port
->sm_vars
&= ~AD_PORT_BEGIN
;
2168 queue_delayed_work(bond
->wq
, &bond
->ad_work
, ad_delta_in_ticks
);
2170 read_unlock(&bond
->lock
);
2174 * bond_3ad_rx_indication - handle a received frame
2175 * @lacpdu: received lacpdu
2176 * @slave: slave struct to work on
2177 * @length: length of the data received
2179 * It is assumed that frames that were sent on this NIC don't returned as new
2180 * received frames (loopback). Since only the payload is given to this
2181 * function, it check for loopback.
2183 static void bond_3ad_rx_indication(struct lacpdu
*lacpdu
, struct slave
*slave
, u16 length
)
2187 if (length
>= sizeof(struct lacpdu
)) {
2189 port
= &(SLAVE_AD_INFO(slave
).port
);
2192 pr_warning("%s: Warning: port of slave %s is uninitialized\n",
2193 slave
->dev
->name
, slave
->dev
->master
->name
);
2197 switch (lacpdu
->subtype
) {
2198 case AD_TYPE_LACPDU
:
2199 pr_debug("Received LACPDU on port %d\n",
2200 port
->actor_port_number
);
2201 ad_rx_machine(lacpdu
, port
);
2204 case AD_TYPE_MARKER
:
2205 // No need to convert fields to Little Endian since we don't use the marker's fields.
2207 switch (((struct bond_marker
*)lacpdu
)->tlv_type
) {
2208 case AD_MARKER_INFORMATION_SUBTYPE
:
2209 pr_debug("Received Marker Information on port %d\n",
2210 port
->actor_port_number
);
2211 ad_marker_info_received((struct bond_marker
*)lacpdu
, port
);
2214 case AD_MARKER_RESPONSE_SUBTYPE
:
2215 pr_debug("Received Marker Response on port %d\n",
2216 port
->actor_port_number
);
2217 ad_marker_response_received((struct bond_marker
*)lacpdu
, port
);
2221 pr_debug("Received an unknown Marker subtype on slot %d\n",
2222 port
->actor_port_number
);
2229 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2230 * @slave: slave struct to work on
2232 * Handle reselection of aggregator (if needed) for this port.
2234 void bond_3ad_adapter_speed_changed(struct slave
*slave
)
2238 port
= &(SLAVE_AD_INFO(slave
).port
);
2240 // if slave is null, the whole port is not initialized
2242 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
2243 slave
->dev
->master
->name
, slave
->dev
->name
);
2247 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2248 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2249 pr_debug("Port %d changed speed\n", port
->actor_port_number
);
2250 // there is no need to reselect a new aggregator, just signal the
2251 // state machines to reinitialize
2252 port
->sm_vars
|= AD_PORT_BEGIN
;
2256 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2257 * @slave: slave struct to work on
2259 * Handle reselection of aggregator (if needed) for this port.
2261 void bond_3ad_adapter_duplex_changed(struct slave
*slave
)
2265 port
=&(SLAVE_AD_INFO(slave
).port
);
2267 // if slave is null, the whole port is not initialized
2269 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
2270 slave
->dev
->master
->name
, slave
->dev
->name
);
2274 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2275 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2276 pr_debug("Port %d changed duplex\n", port
->actor_port_number
);
2277 // there is no need to reselect a new aggregator, just signal the
2278 // state machines to reinitialize
2279 port
->sm_vars
|= AD_PORT_BEGIN
;
2283 * bond_3ad_handle_link_change - handle a slave's link status change indication
2284 * @slave: slave struct to work on
2285 * @status: whether the link is now up or down
2287 * Handle reselection of aggregator (if needed) for this port.
2289 void bond_3ad_handle_link_change(struct slave
*slave
, char link
)
2293 port
= &(SLAVE_AD_INFO(slave
).port
);
2295 // if slave is null, the whole port is not initialized
2297 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
2298 slave
->dev
->master
->name
, slave
->dev
->name
);
2302 // 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)
2303 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2304 if (link
== BOND_LINK_UP
) {
2305 port
->is_enabled
= true;
2306 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2307 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= __get_duplex(port
);
2308 port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
;
2309 port
->actor_oper_port_key
=port
->actor_admin_port_key
|= (__get_link_speed(port
) << 1);
2311 /* link has failed */
2312 port
->is_enabled
= false;
2313 port
->actor_admin_port_key
&= ~AD_DUPLEX_KEY_BITS
;
2314 port
->actor_oper_port_key
= (port
->actor_admin_port_key
&= ~AD_SPEED_KEY_BITS
);
2316 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2317 // there is no need to reselect a new aggregator, just signal the
2318 // state machines to reinitialize
2319 port
->sm_vars
|= AD_PORT_BEGIN
;
2323 * set link state for bonding master: if we have an active
2324 * aggregator, we're up, if not, we're down. Presumes that we cannot
2325 * have an active aggregator if there are no slaves with link up.
2327 * This behavior complies with IEEE 802.3 section 43.3.9.
2329 * Called by bond_set_carrier(). Return zero if carrier state does not
2330 * change, nonzero if it does.
2332 int bond_3ad_set_carrier(struct bonding
*bond
)
2334 if (__get_active_agg(&(SLAVE_AD_INFO(bond
->first_slave
).aggregator
))) {
2335 if (!netif_carrier_ok(bond
->dev
)) {
2336 netif_carrier_on(bond
->dev
);
2342 if (netif_carrier_ok(bond
->dev
)) {
2343 netif_carrier_off(bond
->dev
);
2350 * bond_3ad_get_active_agg_info - get information of the active aggregator
2351 * @bond: bonding struct to work on
2352 * @ad_info: ad_info struct to fill with the bond's info
2354 * Returns: 0 on success
2357 int bond_3ad_get_active_agg_info(struct bonding
*bond
, struct ad_info
*ad_info
)
2359 struct aggregator
*aggregator
= NULL
;
2362 for (port
= __get_first_port(bond
); port
; port
= __get_next_port(port
)) {
2363 if (port
->aggregator
&& port
->aggregator
->is_active
) {
2364 aggregator
= port
->aggregator
;
2370 ad_info
->aggregator_id
= aggregator
->aggregator_identifier
;
2371 ad_info
->ports
= aggregator
->num_of_ports
;
2372 ad_info
->actor_key
= aggregator
->actor_oper_aggregator_key
;
2373 ad_info
->partner_key
= aggregator
->partner_oper_aggregator_key
;
2374 memcpy(ad_info
->partner_system
, aggregator
->partner_system
.mac_addr_value
, ETH_ALEN
);
2381 int bond_3ad_xmit_xor(struct sk_buff
*skb
, struct net_device
*dev
)
2383 struct slave
*slave
, *start_at
;
2384 struct bonding
*bond
= netdev_priv(dev
);
2389 struct ad_info ad_info
;
2392 /* make sure that the slaves list will
2393 * not change during tx
2395 read_lock(&bond
->lock
);
2397 if (!BOND_IS_OK(bond
)) {
2401 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
2402 pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n",
2407 slaves_in_agg
= ad_info
.ports
;
2408 agg_id
= ad_info
.aggregator_id
;
2410 if (slaves_in_agg
== 0) {
2411 /*the aggregator is empty*/
2412 pr_debug("%s: Error: active aggregator is empty\n", dev
->name
);
2416 slave_agg_no
= bond
->xmit_hash_policy(skb
, slaves_in_agg
);
2418 bond_for_each_slave(bond
, slave
, i
) {
2419 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2421 if (agg
&& (agg
->aggregator_identifier
== agg_id
)) {
2423 if (slave_agg_no
< 0) {
2429 if (slave_agg_no
>= 0) {
2430 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2437 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
2438 int slave_agg_id
= 0;
2439 struct aggregator
*agg
= SLAVE_AD_INFO(slave
).port
.aggregator
;
2442 slave_agg_id
= agg
->aggregator_identifier
;
2445 if (SLAVE_IS_OK(slave
) && agg
&& (slave_agg_id
== agg_id
)) {
2446 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
2453 /* no suitable interface, frame not sent */
2456 read_unlock(&bond
->lock
);
2457 return NETDEV_TX_OK
;
2460 int bond_3ad_lacpdu_recv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
* ptype
, struct net_device
*orig_dev
)
2462 struct bonding
*bond
= netdev_priv(dev
);
2463 struct slave
*slave
= NULL
;
2464 int ret
= NET_RX_DROP
;
2466 if (!(dev
->flags
& IFF_MASTER
))
2469 read_lock(&bond
->lock
);
2470 slave
= bond_get_slave_by_dev((struct bonding
*)netdev_priv(dev
),
2475 bond_3ad_rx_indication((struct lacpdu
*) skb
->data
, slave
, skb
->len
);
2477 ret
= NET_RX_SUCCESS
;
2480 read_unlock(&bond
->lock
);