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
65 #define AD_PORT_BEGIN 0x1
66 #define AD_PORT_LACP_ENABLED 0x2
67 #define AD_PORT_ACTOR_CHURN 0x4
68 #define AD_PORT_PARTNER_CHURN 0x8
69 #define AD_PORT_READY 0x10
70 #define AD_PORT_READY_N 0x20
71 #define AD_PORT_MATCHED 0x40
72 #define AD_PORT_STANDBY 0x80
73 #define AD_PORT_SELECTED 0x100
74 #define AD_PORT_MOVED 0x200
76 /* Port Key definitions
77 * key is determined according to the link speed, duplex and
78 * user key (which is yet not supported)
79 * --------------------------------------------------------------
80 * Port key : | User key | Speed | Duplex |
81 * --------------------------------------------------------------
84 #define AD_DUPLEX_KEY_BITS 0x1
85 #define AD_SPEED_KEY_BITS 0x3E
86 #define AD_USER_KEY_BITS 0xFFC0
88 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1
89 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2
90 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4
91 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
92 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
94 /* compare MAC addresses */
95 #define MAC_ADDRESS_EQUAL(A, B) \
96 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
98 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
99 static u16 ad_ticks_per_sec;
100 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
102 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
104 /* ================= main 802.3ad protocol functions ================== */
105 static int ad_lacpdu_send(struct port *port);
106 static int ad_marker_send(struct port *port, struct bond_marker *marker);
107 static void ad_mux_machine(struct port *port);
108 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
109 static void ad_tx_machine(struct port *port);
110 static void ad_periodic_machine(struct port *port);
111 static void ad_port_selection_logic(struct port *port);
112 static void ad_agg_selection_logic(struct aggregator *aggregator);
113 static void ad_clear_agg(struct aggregator *aggregator);
114 static void ad_initialize_agg(struct aggregator *aggregator);
115 static void ad_initialize_port(struct port *port, int lacp_fast);
116 static void ad_enable_collecting_distributing(struct port *port);
117 static void ad_disable_collecting_distributing(struct port *port);
118 static void ad_marker_info_received(struct bond_marker *marker_info,
120 static void ad_marker_response_received(struct bond_marker *marker,
124 /* ================= api to bonding and kernel code ================== */
127 * __get_bond_by_port - get the port's bonding struct
128 * @port: the port we're looking at
130 * Return @port's bonding struct, or %NULL if it can't be found.
132 static inline struct bonding *__get_bond_by_port(struct port *port)
134 if (port->slave == NULL)
137 return bond_get_bond_by_slave(port->slave);
141 * __get_first_agg - get the first aggregator in the bond
142 * @bond: the bond we're looking at
144 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
147 static inline struct aggregator *__get_first_agg(struct port *port)
149 struct bonding *bond = __get_bond_by_port(port);
150 struct slave *first_slave;
152 /* If there's no bond for this port, or bond has no slaves */
157 first_slave = bond_first_slave_rcu(bond);
160 return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL;
164 * __agg_has_partner - see if we have a partner
165 * @agg: the agregator we're looking at
167 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
168 * address for the partner). Return 0 if not.
170 static inline int __agg_has_partner(struct aggregator *agg)
172 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
176 * __disable_port - disable the port's slave
177 * @port: the port we're looking at
179 static inline void __disable_port(struct port *port)
181 bond_set_slave_inactive_flags(port->slave);
185 * __enable_port - enable the port's slave, if it's up
186 * @port: the port we're looking at
188 static inline void __enable_port(struct port *port)
190 struct slave *slave = port->slave;
192 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
193 bond_set_slave_active_flags(slave);
197 * __port_is_enabled - check if the port's slave is in active state
198 * @port: the port we're looking at
200 static inline int __port_is_enabled(struct port *port)
202 return bond_is_active_slave(port->slave);
206 * __get_agg_selection_mode - get the aggregator selection mode
207 * @port: the port we're looking at
209 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
211 static inline u32 __get_agg_selection_mode(struct port *port)
213 struct bonding *bond = __get_bond_by_port(port);
216 return BOND_AD_STABLE;
218 return bond->params.ad_select;
222 * __check_agg_selection_timer - check if the selection timer has expired
223 * @port: the port we're looking at
225 static inline int __check_agg_selection_timer(struct port *port)
227 struct bonding *bond = __get_bond_by_port(port);
232 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
236 * __get_state_machine_lock - lock the port's state machines
237 * @port: the port we're looking at
239 static inline void __get_state_machine_lock(struct port *port)
241 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
245 * __release_state_machine_lock - unlock the port's state machines
246 * @port: the port we're looking at
248 static inline void __release_state_machine_lock(struct port *port)
250 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
254 * __get_link_speed - get a port's speed
255 * @port: the port we're looking at
257 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
259 * %AD_LINK_SPEED_BITMASK_10MBPS,
260 * %AD_LINK_SPEED_BITMASK_100MBPS,
261 * %AD_LINK_SPEED_BITMASK_1000MBPS,
262 * %AD_LINK_SPEED_BITMASK_10000MBPS
264 static u16 __get_link_speed(struct port *port)
266 struct slave *slave = port->slave;
269 /* this if covers only a special case: when the configuration starts
270 * with link down, it sets the speed to 0.
271 * This is done in spite of the fact that the e100 driver reports 0
272 * to be compatible with MVT in the future.
274 if (slave->link != BOND_LINK_UP)
277 switch (slave->speed) {
279 speed = AD_LINK_SPEED_BITMASK_10MBPS;
283 speed = AD_LINK_SPEED_BITMASK_100MBPS;
287 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
291 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
295 /* unknown speed value from ethtool. shouldn't happen */
301 pr_debug("Port %d Received link speed %d update from adapter\n",
302 port->actor_port_number, speed);
307 * __get_duplex - get a port's duplex
308 * @port: the port we're looking at
310 * Return @port's duplex in 802.3ad bitmask format. i.e.:
311 * 0x01 if in full duplex
314 static u8 __get_duplex(struct port *port)
316 struct slave *slave = port->slave;
320 /* handling a special case: when the configuration starts with
321 * link down, it sets the duplex to 0.
323 if (slave->link != BOND_LINK_UP)
326 switch (slave->duplex) {
329 pr_debug("Port %d Received status full duplex update from adapter\n",
330 port->actor_port_number);
335 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
336 port->actor_port_number);
344 * __initialize_port_locks - initialize a port's STATE machine spinlock
345 * @port: the slave of the port we're looking at
347 static inline void __initialize_port_locks(struct slave *slave)
349 /* make sure it isn't called twice */
350 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock));
356 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
357 * @timer_type: which timer to operate
358 * @par: timer parameter. see below
360 * If @timer_type is %current_while_timer, @par indicates long/short timer.
361 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
362 * %SLOW_PERIODIC_TIME.
364 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
366 u16 retval = 0; /* to silence the compiler */
368 switch (timer_type) {
369 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
371 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
373 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
375 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
376 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
378 case AD_PERIODIC_TIMER: /* for periodic machine */
379 retval = (par*ad_ticks_per_sec); /* long timeout */
381 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
382 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
384 case AD_WAIT_WHILE_TIMER: /* for selection machine */
385 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
393 /* ================= ad_rx_machine helper functions ================== */
396 * __choose_matched - update a port's matched variable from a received lacpdu
397 * @lacpdu: the lacpdu we've received
398 * @port: the port we're looking at
400 * Update the value of the matched variable, using parameter values from a
401 * newly received lacpdu. Parameter values for the partner carried in the
402 * received PDU are compared with the corresponding operational parameter
403 * values for the actor. Matched is set to TRUE if all of these parameters
404 * match and the PDU parameter partner_state.aggregation has the same value as
405 * actor_oper_port_state.aggregation and lacp will actively maintain the link
406 * in the aggregation. Matched is also set to TRUE if the value of
407 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
408 * an individual link and lacp will actively maintain the link. Otherwise,
409 * matched is set to FALSE. LACP is considered to be actively maintaining the
410 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
411 * the actor's actor_oper_port_state.lacp_activity and the PDU's
412 * partner_state.lacp_activity variables are TRUE.
414 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
415 * used here to implement the language from 802.3ad 43.4.9 that requires
416 * recordPDU to "match" the LACPDU parameters to the stored values.
418 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
420 /* check if all parameters are alike
421 * or this is individual link(aggregation == FALSE)
422 * then update the state machine Matched variable.
424 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
425 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
426 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
427 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
428 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
429 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
430 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
432 port->sm_vars |= AD_PORT_MATCHED;
434 port->sm_vars &= ~AD_PORT_MATCHED;
439 * __record_pdu - record parameters from a received lacpdu
440 * @lacpdu: the lacpdu we've received
441 * @port: the port we're looking at
443 * Record the parameter values for the Actor carried in a received lacpdu as
444 * the current partner operational parameter values and sets
445 * actor_oper_port_state.defaulted to FALSE.
447 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
449 if (lacpdu && port) {
450 struct port_params *partner = &port->partner_oper;
452 __choose_matched(lacpdu, port);
453 /* record the new parameter values for the partner
456 partner->port_number = ntohs(lacpdu->actor_port);
457 partner->port_priority = ntohs(lacpdu->actor_port_priority);
458 partner->system = lacpdu->actor_system;
459 partner->system_priority = ntohs(lacpdu->actor_system_priority);
460 partner->key = ntohs(lacpdu->actor_key);
461 partner->port_state = lacpdu->actor_state;
463 /* set actor_oper_port_state.defaulted to FALSE */
464 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
466 /* set the partner sync. to on if the partner is sync,
467 * and the port is matched
469 if ((port->sm_vars & AD_PORT_MATCHED)
470 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
471 partner->port_state |= AD_STATE_SYNCHRONIZATION;
473 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
478 * __record_default - record default parameters
479 * @port: the port we're looking at
481 * This function records the default parameter values for the partner carried
482 * in the Partner Admin parameters as the current partner operational parameter
483 * values and sets actor_oper_port_state.defaulted to TRUE.
485 static void __record_default(struct port *port)
488 /* record the partner admin parameters */
489 memcpy(&port->partner_oper, &port->partner_admin,
490 sizeof(struct port_params));
492 /* set actor_oper_port_state.defaulted to true */
493 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
498 * __update_selected - update a port's Selected variable from a received lacpdu
499 * @lacpdu: the lacpdu we've received
500 * @port: the port we're looking at
502 * Update the value of the selected variable, using parameter values from a
503 * newly received lacpdu. The parameter values for the Actor carried in the
504 * received PDU are compared with the corresponding operational parameter
505 * values for the ports partner. If one or more of the comparisons shows that
506 * the value(s) received in the PDU differ from the current operational values,
507 * then selected is set to FALSE and actor_oper_port_state.synchronization is
508 * set to out_of_sync. Otherwise, selected remains unchanged.
510 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
512 if (lacpdu && port) {
513 const struct port_params *partner = &port->partner_oper;
515 /* check if any parameter is different then
516 * update the state machine selected variable.
518 if (ntohs(lacpdu->actor_port) != partner->port_number ||
519 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
520 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
521 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
522 ntohs(lacpdu->actor_key) != partner->key ||
523 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
524 port->sm_vars &= ~AD_PORT_SELECTED;
530 * __update_default_selected - update a port's Selected variable from Partner
531 * @port: the port we're looking at
533 * This function updates the value of the selected variable, using the partner
534 * administrative parameter values. The administrative values are compared with
535 * the corresponding operational parameter values for the partner. If one or
536 * more of the comparisons shows that the administrative value(s) differ from
537 * the current operational values, then Selected is set to FALSE and
538 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
539 * Selected remains unchanged.
541 static void __update_default_selected(struct port *port)
544 const struct port_params *admin = &port->partner_admin;
545 const struct port_params *oper = &port->partner_oper;
547 /* check if any parameter is different then
548 * update the state machine selected variable.
550 if (admin->port_number != oper->port_number ||
551 admin->port_priority != oper->port_priority ||
552 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
553 admin->system_priority != oper->system_priority ||
554 admin->key != oper->key ||
555 (admin->port_state & AD_STATE_AGGREGATION)
556 != (oper->port_state & AD_STATE_AGGREGATION)) {
557 port->sm_vars &= ~AD_PORT_SELECTED;
563 * __update_ntt - update a port's ntt variable from a received lacpdu
564 * @lacpdu: the lacpdu we've received
565 * @port: the port we're looking at
567 * Updates the value of the ntt variable, using parameter values from a newly
568 * received lacpdu. The parameter values for the partner carried in the
569 * received PDU are compared with the corresponding operational parameter
570 * values for the Actor. If one or more of the comparisons shows that the
571 * value(s) received in the PDU differ from the current operational values,
572 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
574 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
576 /* validate lacpdu and port */
577 if (lacpdu && port) {
578 /* check if any parameter is different then
579 * update the port->ntt.
581 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
582 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
583 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
584 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
585 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
586 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
587 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
588 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
589 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
597 * __attach_bond_to_agg
598 * @port: the port we're looking at
600 * Handle the attaching of the port's control parser/multiplexer and the
601 * aggregator. This function does nothing since the parser/multiplexer of the
602 * receive and the parser/multiplexer of the aggregator are already combined.
604 static void __attach_bond_to_agg(struct port *port)
606 port = NULL; /* just to satisfy the compiler */
607 /* This function does nothing since the parser/multiplexer of the
608 * receive and the parser/multiplexer of the aggregator are already
614 * __detach_bond_from_agg
615 * @port: the port we're looking at
617 * Handle the detaching of the port's control parser/multiplexer from the
618 * aggregator. This function does nothing since the parser/multiplexer of the
619 * receive and the parser/multiplexer of the aggregator are already combined.
621 static void __detach_bond_from_agg(struct port *port)
623 port = NULL; /* just to satisfy the compiler */
624 /* This function does nothing since the parser/multiplexer of the
625 * receive and the parser/multiplexer of the aggregator are already
631 * __agg_ports_are_ready - check if all ports in an aggregator are ready
632 * @aggregator: the aggregator we're looking at
635 static int __agg_ports_are_ready(struct aggregator *aggregator)
641 /* scan all ports in this aggregator to verfy if they are
644 for (port = aggregator->lag_ports;
646 port = port->next_port_in_aggregator) {
647 if (!(port->sm_vars & AD_PORT_READY_N)) {
658 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
659 * @aggregator: the aggregator we're looking at
660 * @val: Should the ports' ready bit be set on or off
663 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
667 for (port = aggregator->lag_ports; port;
668 port = port->next_port_in_aggregator) {
670 port->sm_vars |= AD_PORT_READY;
672 port->sm_vars &= ~AD_PORT_READY;
677 * __get_agg_bandwidth - get the total bandwidth of an aggregator
678 * @aggregator: the aggregator we're looking at
681 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
685 if (aggregator->num_of_ports) {
686 switch (__get_link_speed(aggregator->lag_ports)) {
687 case AD_LINK_SPEED_BITMASK_1MBPS:
688 bandwidth = aggregator->num_of_ports;
690 case AD_LINK_SPEED_BITMASK_10MBPS:
691 bandwidth = aggregator->num_of_ports * 10;
693 case AD_LINK_SPEED_BITMASK_100MBPS:
694 bandwidth = aggregator->num_of_ports * 100;
696 case AD_LINK_SPEED_BITMASK_1000MBPS:
697 bandwidth = aggregator->num_of_ports * 1000;
699 case AD_LINK_SPEED_BITMASK_10000MBPS:
700 bandwidth = aggregator->num_of_ports * 10000;
703 bandwidth = 0; /* to silence the compiler */
710 * __get_active_agg - get the current active aggregator
711 * @aggregator: the aggregator we're looking at
713 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
715 struct bonding *bond = aggregator->slave->bond;
716 struct list_head *iter;
720 bond_for_each_slave_rcu(bond, slave, iter)
721 if (SLAVE_AD_INFO(slave).aggregator.is_active) {
723 return &(SLAVE_AD_INFO(slave).aggregator);
731 * __update_lacpdu_from_port - update a port's lacpdu fields
732 * @port: the port we're looking at
734 static inline void __update_lacpdu_from_port(struct port *port)
736 struct lacpdu *lacpdu = &port->lacpdu;
737 const struct port_params *partner = &port->partner_oper;
739 /* update current actual Actor parameters
740 * lacpdu->subtype initialized
741 * lacpdu->version_number initialized
742 * lacpdu->tlv_type_actor_info initialized
743 * lacpdu->actor_information_length initialized
746 lacpdu->actor_system_priority = htons(port->actor_system_priority);
747 lacpdu->actor_system = port->actor_system;
748 lacpdu->actor_key = htons(port->actor_oper_port_key);
749 lacpdu->actor_port_priority = htons(port->actor_port_priority);
750 lacpdu->actor_port = htons(port->actor_port_number);
751 lacpdu->actor_state = port->actor_oper_port_state;
753 /* lacpdu->reserved_3_1 initialized
754 * lacpdu->tlv_type_partner_info initialized
755 * lacpdu->partner_information_length initialized
758 lacpdu->partner_system_priority = htons(partner->system_priority);
759 lacpdu->partner_system = partner->system;
760 lacpdu->partner_key = htons(partner->key);
761 lacpdu->partner_port_priority = htons(partner->port_priority);
762 lacpdu->partner_port = htons(partner->port_number);
763 lacpdu->partner_state = partner->port_state;
765 /* lacpdu->reserved_3_2 initialized
766 * lacpdu->tlv_type_collector_info initialized
767 * lacpdu->collector_information_length initialized
768 * collector_max_delay initialized
769 * reserved_12[12] initialized
770 * tlv_type_terminator initialized
771 * terminator_length initialized
772 * reserved_50[50] initialized
776 /* ================= main 802.3ad protocol code ========================= */
779 * ad_lacpdu_send - send out a lacpdu packet on a given port
780 * @port: the port we're looking at
782 * Returns: 0 on success
785 static int ad_lacpdu_send(struct port *port)
787 struct slave *slave = port->slave;
789 struct lacpdu_header *lacpdu_header;
790 int length = sizeof(struct lacpdu_header);
792 skb = dev_alloc_skb(length);
796 skb->dev = slave->dev;
797 skb_reset_mac_header(skb);
798 skb->network_header = skb->mac_header + ETH_HLEN;
799 skb->protocol = PKT_TYPE_LACPDU;
800 skb->priority = TC_PRIO_CONTROL;
802 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
804 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
805 /* Note: source address is set to be the member's PERMANENT address,
806 * because we use it to identify loopback lacpdus in receive.
808 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
809 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
811 lacpdu_header->lacpdu = port->lacpdu;
819 * ad_marker_send - send marker information/response on a given port
820 * @port: the port we're looking at
821 * @marker: marker data to send
823 * Returns: 0 on success
826 static int ad_marker_send(struct port *port, struct bond_marker *marker)
828 struct slave *slave = port->slave;
830 struct bond_marker_header *marker_header;
831 int length = sizeof(struct bond_marker_header);
833 skb = dev_alloc_skb(length + 16);
837 skb_reserve(skb, 16);
839 skb->dev = slave->dev;
840 skb_reset_mac_header(skb);
841 skb->network_header = skb->mac_header + ETH_HLEN;
842 skb->protocol = PKT_TYPE_LACPDU;
844 marker_header = (struct bond_marker_header *)skb_put(skb, length);
846 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
847 /* Note: source address is set to be the member's PERMANENT address,
848 * because we use it to identify loopback MARKERs in receive.
850 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
851 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
853 marker_header->marker = *marker;
861 * ad_mux_machine - handle a port's mux state machine
862 * @port: the port we're looking at
864 static void ad_mux_machine(struct port *port)
866 mux_states_t last_state;
868 /* keep current State Machine state to compare later if it was
871 last_state = port->sm_mux_state;
873 if (port->sm_vars & AD_PORT_BEGIN) {
874 port->sm_mux_state = AD_MUX_DETACHED;
876 switch (port->sm_mux_state) {
877 case AD_MUX_DETACHED:
878 if ((port->sm_vars & AD_PORT_SELECTED)
879 || (port->sm_vars & AD_PORT_STANDBY))
880 /* if SELECTED or STANDBY */
881 port->sm_mux_state = AD_MUX_WAITING;
884 /* if SELECTED == FALSE return to DETACH state */
885 if (!(port->sm_vars & AD_PORT_SELECTED)) {
886 port->sm_vars &= ~AD_PORT_READY_N;
887 /* in order to withhold the Selection Logic to
888 * check all ports READY_N value every callback
889 * cycle to update ready variable, we check
890 * READY_N and update READY here
892 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
893 port->sm_mux_state = AD_MUX_DETACHED;
897 /* check if the wait_while_timer expired */
898 if (port->sm_mux_timer_counter
899 && !(--port->sm_mux_timer_counter))
900 port->sm_vars |= AD_PORT_READY_N;
902 /* in order to withhold the selection logic to check
903 * all ports READY_N value every callback cycle to
904 * update ready variable, we check READY_N and update
907 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
909 /* if the wait_while_timer expired, and the port is
910 * in READY state, move to ATTACHED state
912 if ((port->sm_vars & AD_PORT_READY)
913 && !port->sm_mux_timer_counter)
914 port->sm_mux_state = AD_MUX_ATTACHED;
916 case AD_MUX_ATTACHED:
917 /* check also if agg_select_timer expired (so the
918 * edable port will take place only after this timer)
920 if ((port->sm_vars & AD_PORT_SELECTED) &&
921 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
922 !__check_agg_selection_timer(port)) {
923 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;
924 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
925 (port->sm_vars & AD_PORT_STANDBY)) {
926 /* if UNSELECTED or STANDBY */
927 port->sm_vars &= ~AD_PORT_READY_N;
928 /* in order to withhold the selection logic to
929 * check all ports READY_N value every callback
930 * cycle to update ready variable, we check
931 * READY_N and update READY here
933 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
934 port->sm_mux_state = AD_MUX_DETACHED;
937 case AD_MUX_COLLECTING_DISTRIBUTING:
938 if (!(port->sm_vars & AD_PORT_SELECTED) ||
939 (port->sm_vars & AD_PORT_STANDBY) ||
940 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) {
941 port->sm_mux_state = AD_MUX_ATTACHED;
943 /* if port state hasn't changed make
944 * sure that a collecting distributing
945 * port in an active aggregator is enabled
947 if (port->aggregator &&
948 port->aggregator->is_active &&
949 !__port_is_enabled(port)) {
960 /* check if the state machine was changed */
961 if (port->sm_mux_state != last_state) {
962 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
963 port->actor_port_number, last_state,
965 switch (port->sm_mux_state) {
966 case AD_MUX_DETACHED:
967 __detach_bond_from_agg(port);
968 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
969 ad_disable_collecting_distributing(port);
970 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
971 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
975 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
977 case AD_MUX_ATTACHED:
978 __attach_bond_to_agg(port);
979 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
980 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
981 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
982 ad_disable_collecting_distributing(port);
985 case AD_MUX_COLLECTING_DISTRIBUTING:
986 port->actor_oper_port_state |= AD_STATE_COLLECTING;
987 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
988 ad_enable_collecting_distributing(port);
998 * ad_rx_machine - handle a port's rx State Machine
999 * @lacpdu: the lacpdu we've received
1000 * @port: the port we're looking at
1002 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1003 * CURRENT. If timer expired set the state machine in the proper state.
1004 * In other cases, this function checks if we need to switch to other state.
1006 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1008 rx_states_t last_state;
1010 /* keep current State Machine state to compare later if it was
1013 last_state = port->sm_rx_state;
1015 /* check if state machine should change state */
1017 /* first, check if port was reinitialized */
1018 if (port->sm_vars & AD_PORT_BEGIN)
1019 port->sm_rx_state = AD_RX_INITIALIZE;
1020 /* check if port is not enabled */
1021 else if (!(port->sm_vars & AD_PORT_BEGIN)
1022 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1023 port->sm_rx_state = AD_RX_PORT_DISABLED;
1024 /* check if new lacpdu arrived */
1025 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1026 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1027 (port->sm_rx_state == AD_RX_CURRENT))) {
1028 port->sm_rx_timer_counter = 0;
1029 port->sm_rx_state = AD_RX_CURRENT;
1031 /* if timer is on, and if it is expired */
1032 if (port->sm_rx_timer_counter &&
1033 !(--port->sm_rx_timer_counter)) {
1034 switch (port->sm_rx_state) {
1036 port->sm_rx_state = AD_RX_DEFAULTED;
1039 port->sm_rx_state = AD_RX_EXPIRED;
1045 /* if no lacpdu arrived and no timer is on */
1046 switch (port->sm_rx_state) {
1047 case AD_RX_PORT_DISABLED:
1048 if (port->sm_vars & AD_PORT_MOVED)
1049 port->sm_rx_state = AD_RX_INITIALIZE;
1050 else if (port->is_enabled
1052 & AD_PORT_LACP_ENABLED))
1053 port->sm_rx_state = AD_RX_EXPIRED;
1054 else if (port->is_enabled
1056 & AD_PORT_LACP_ENABLED) == 0))
1057 port->sm_rx_state = AD_RX_LACP_DISABLED;
1066 /* check if the State machine was changed or new lacpdu arrived */
1067 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1068 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1069 port->actor_port_number, last_state,
1071 switch (port->sm_rx_state) {
1072 case AD_RX_INITIALIZE:
1073 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1074 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1076 port->sm_vars |= AD_PORT_LACP_ENABLED;
1077 port->sm_vars &= ~AD_PORT_SELECTED;
1078 __record_default(port);
1079 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1080 port->sm_vars &= ~AD_PORT_MOVED;
1081 port->sm_rx_state = AD_RX_PORT_DISABLED;
1084 case AD_RX_PORT_DISABLED:
1085 port->sm_vars &= ~AD_PORT_MATCHED;
1087 case AD_RX_LACP_DISABLED:
1088 port->sm_vars &= ~AD_PORT_SELECTED;
1089 __record_default(port);
1090 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1091 port->sm_vars |= AD_PORT_MATCHED;
1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1095 /* Reset of the Synchronization flag (Standard 43.4.12)
1096 * This reset cause to disable this port in the
1097 * COLLECTING_DISTRIBUTING state of the mux machine in
1098 * case of EXPIRED even if LINK_DOWN didn't arrive for
1101 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1102 port->sm_vars &= ~AD_PORT_MATCHED;
1103 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1104 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1105 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1107 case AD_RX_DEFAULTED:
1108 __update_default_selected(port);
1109 __record_default(port);
1110 port->sm_vars |= AD_PORT_MATCHED;
1111 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1114 /* detect loopback situation */
1115 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1116 &(port->actor_system))) {
1117 pr_err("%s: An illegal loopback occurred on adapter (%s).\nCheck the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1118 port->slave->bond->dev->name,
1119 port->slave->dev->name);
1122 __update_selected(lacpdu, port);
1123 __update_ntt(lacpdu, port);
1124 __record_pdu(lacpdu, port);
1125 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1126 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1135 * ad_tx_machine - handle a port's tx state machine
1136 * @port: the port we're looking at
1138 static void ad_tx_machine(struct port *port)
1140 /* check if tx timer expired, to verify that we do not send more than
1141 * 3 packets per second
1143 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1144 /* check if there is something to send */
1145 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1146 __update_lacpdu_from_port(port);
1148 if (ad_lacpdu_send(port) >= 0) {
1149 pr_debug("Sent LACPDU on port %d\n",
1150 port->actor_port_number);
1152 /* mark ntt as false, so it will not be sent
1153 * again until demanded
1158 /* restart tx timer(to verify that we will not exceed
1159 * AD_MAX_TX_IN_SECOND
1161 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1166 * ad_periodic_machine - handle a port's periodic state machine
1167 * @port: the port we're looking at
1169 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1171 static void ad_periodic_machine(struct port *port)
1173 periodic_states_t last_state;
1175 /* keep current state machine state to compare later if it was changed */
1176 last_state = port->sm_periodic_state;
1178 /* check if port was reinitialized */
1179 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1180 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1182 port->sm_periodic_state = AD_NO_PERIODIC;
1184 /* check if state machine should change state */
1185 else if (port->sm_periodic_timer_counter) {
1186 /* check if periodic state machine expired */
1187 if (!(--port->sm_periodic_timer_counter)) {
1188 /* if expired then do tx */
1189 port->sm_periodic_state = AD_PERIODIC_TX;
1191 /* If not expired, check if there is some new timeout
1192 * parameter from the partner state
1194 switch (port->sm_periodic_state) {
1195 case AD_FAST_PERIODIC:
1196 if (!(port->partner_oper.port_state
1197 & AD_STATE_LACP_TIMEOUT))
1198 port->sm_periodic_state = AD_SLOW_PERIODIC;
1200 case AD_SLOW_PERIODIC:
1201 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1202 port->sm_periodic_timer_counter = 0;
1203 port->sm_periodic_state = AD_PERIODIC_TX;
1211 switch (port->sm_periodic_state) {
1212 case AD_NO_PERIODIC:
1213 port->sm_periodic_state = AD_FAST_PERIODIC;
1215 case AD_PERIODIC_TX:
1216 if (!(port->partner_oper.port_state &
1217 AD_STATE_LACP_TIMEOUT))
1218 port->sm_periodic_state = AD_SLOW_PERIODIC;
1220 port->sm_periodic_state = AD_FAST_PERIODIC;
1227 /* check if the state machine was changed */
1228 if (port->sm_periodic_state != last_state) {
1229 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1230 port->actor_port_number, last_state,
1231 port->sm_periodic_state);
1232 switch (port->sm_periodic_state) {
1233 case AD_NO_PERIODIC:
1234 port->sm_periodic_timer_counter = 0;
1236 case AD_FAST_PERIODIC:
1237 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1238 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1240 case AD_SLOW_PERIODIC:
1241 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1242 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1244 case AD_PERIODIC_TX:
1254 * ad_port_selection_logic - select aggregation groups
1255 * @port: the port we're looking at
1257 * Select aggregation groups, and assign each port for it's aggregetor. The
1258 * selection logic is called in the inititalization (after all the handshkes),
1259 * and after every lacpdu receive (if selected is off).
1261 static void ad_port_selection_logic(struct port *port)
1263 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1264 struct port *last_port = NULL, *curr_port;
1265 struct list_head *iter;
1266 struct bonding *bond;
1267 struct slave *slave;
1270 /* if the port is already Selected, do nothing */
1271 if (port->sm_vars & AD_PORT_SELECTED)
1274 bond = __get_bond_by_port(port);
1276 /* if the port is connected to other aggregator, detach it */
1277 if (port->aggregator) {
1278 /* detach the port from its former aggregator */
1279 temp_aggregator = port->aggregator;
1280 for (curr_port = temp_aggregator->lag_ports; curr_port;
1281 last_port = curr_port,
1282 curr_port = curr_port->next_port_in_aggregator) {
1283 if (curr_port == port) {
1284 temp_aggregator->num_of_ports--;
1285 /* if it is the first port attached to the
1289 temp_aggregator->lag_ports =
1290 port->next_port_in_aggregator;
1292 /* not the first port attached to the
1295 last_port->next_port_in_aggregator =
1296 port->next_port_in_aggregator;
1299 /* clear the port's relations to this
1302 port->aggregator = NULL;
1303 port->next_port_in_aggregator = NULL;
1304 port->actor_port_aggregator_identifier = 0;
1306 pr_debug("Port %d left LAG %d\n",
1307 port->actor_port_number,
1308 temp_aggregator->aggregator_identifier);
1309 /* if the aggregator is empty, clear its
1310 * parameters, and set it ready to be attached
1312 if (!temp_aggregator->lag_ports)
1313 ad_clear_agg(temp_aggregator);
1318 /* meaning: the port was related to an aggregator
1319 * but was not on the aggregator port list
1321 pr_warn("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1322 port->slave->bond->dev->name,
1323 port->actor_port_number,
1324 port->slave->dev->name,
1325 port->aggregator->aggregator_identifier);
1328 /* search on all aggregators for a suitable aggregator for this port */
1329 bond_for_each_slave(bond, slave, iter) {
1330 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1332 /* keep a free aggregator for later use(if needed) */
1333 if (!aggregator->lag_ports) {
1334 if (!free_aggregator)
1335 free_aggregator = aggregator;
1338 /* check if current aggregator suits us */
1339 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1340 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1341 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1342 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1344 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1345 !aggregator->is_individual) /* but is not individual OR */
1348 /* attach to the founded aggregator */
1349 port->aggregator = aggregator;
1350 port->actor_port_aggregator_identifier =
1351 port->aggregator->aggregator_identifier;
1352 port->next_port_in_aggregator = aggregator->lag_ports;
1353 port->aggregator->num_of_ports++;
1354 aggregator->lag_ports = port;
1355 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1356 port->actor_port_number,
1357 port->aggregator->aggregator_identifier);
1359 /* mark this port as selected */
1360 port->sm_vars |= AD_PORT_SELECTED;
1366 /* the port couldn't find an aggregator - attach it to a new
1370 if (free_aggregator) {
1371 /* assign port a new aggregator */
1372 port->aggregator = free_aggregator;
1373 port->actor_port_aggregator_identifier =
1374 port->aggregator->aggregator_identifier;
1376 /* update the new aggregator's parameters
1377 * if port was responsed from the end-user
1379 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1380 /* if port is full duplex */
1381 port->aggregator->is_individual = false;
1383 port->aggregator->is_individual = true;
1385 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1386 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1387 port->aggregator->partner_system =
1388 port->partner_oper.system;
1389 port->aggregator->partner_system_priority =
1390 port->partner_oper.system_priority;
1391 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1392 port->aggregator->receive_state = 1;
1393 port->aggregator->transmit_state = 1;
1394 port->aggregator->lag_ports = port;
1395 port->aggregator->num_of_ports++;
1397 /* mark this port as selected */
1398 port->sm_vars |= AD_PORT_SELECTED;
1400 pr_debug("Port %d joined LAG %d(new LAG)\n",
1401 port->actor_port_number,
1402 port->aggregator->aggregator_identifier);
1404 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
1405 port->slave->bond->dev->name,
1406 port->actor_port_number, port->slave->dev->name);
1409 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1410 * in all aggregator's ports, else set ready=FALSE in all
1411 * aggregator's ports
1413 __set_agg_ports_ready(port->aggregator,
1414 __agg_ports_are_ready(port->aggregator));
1416 aggregator = __get_first_agg(port);
1417 ad_agg_selection_logic(aggregator);
1420 /* Decide if "agg" is a better choice for the new active aggregator that
1421 * the current best, according to the ad_select policy.
1423 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1424 struct aggregator *curr)
1426 /* 0. If no best, select current.
1428 * 1. If the current agg is not individual, and the best is
1429 * individual, select current.
1431 * 2. If current agg is individual and the best is not, keep best.
1433 * 3. Therefore, current and best are both individual or both not
1436 * 3a. If current agg partner replied, and best agg partner did not,
1439 * 3b. If current agg partner did not reply and best agg partner
1440 * did reply, keep best.
1442 * 4. Therefore, current and best both have partner replies or
1443 * both do not, so perform selection policy:
1445 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1446 * select by bandwidth.
1448 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1453 if (!curr->is_individual && best->is_individual)
1456 if (curr->is_individual && !best->is_individual)
1459 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1462 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1465 switch (__get_agg_selection_mode(curr->lag_ports)) {
1467 if (curr->num_of_ports > best->num_of_ports)
1470 if (curr->num_of_ports < best->num_of_ports)
1474 case BOND_AD_STABLE:
1475 case BOND_AD_BANDWIDTH:
1476 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1482 pr_warn("%s: Impossible agg select mode %d\n",
1483 curr->slave->bond->dev->name,
1484 __get_agg_selection_mode(curr->lag_ports));
1491 static int agg_device_up(const struct aggregator *agg)
1493 struct port *port = agg->lag_ports;
1498 return netif_running(port->slave->dev) &&
1499 netif_carrier_ok(port->slave->dev);
1503 * ad_agg_selection_logic - select an aggregation group for a team
1504 * @aggregator: the aggregator we're looking at
1506 * It is assumed that only one aggregator may be selected for a team.
1508 * The logic of this function is to select the aggregator according to
1509 * the ad_select policy:
1511 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1512 * it, and to reselect the active aggregator only if the previous
1513 * aggregator has no more ports related to it.
1515 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1516 * bandwidth, and reselect whenever a link state change takes place or the
1517 * set of slaves in the bond changes.
1519 * BOND_AD_COUNT: select the aggregator with largest number of ports
1520 * (slaves), and reselect whenever a link state change takes place or the
1521 * set of slaves in the bond changes.
1523 * FIXME: this function MUST be called with the first agg in the bond, or
1524 * __get_active_agg() won't work correctly. This function should be better
1525 * called with the bond itself, and retrieve the first agg from it.
1527 static void ad_agg_selection_logic(struct aggregator *agg)
1529 struct aggregator *best, *active, *origin;
1530 struct bonding *bond = agg->slave->bond;
1531 struct list_head *iter;
1532 struct slave *slave;
1536 active = __get_active_agg(agg);
1537 best = (active && agg_device_up(active)) ? active : NULL;
1540 bond_for_each_slave_rcu(bond, slave, iter) {
1541 agg = &(SLAVE_AD_INFO(slave).aggregator);
1545 if (agg->num_of_ports && agg_device_up(agg))
1546 best = ad_agg_selection_test(best, agg);
1550 __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) &&
1560 !__agg_has_partner(best)))) {
1561 if (!(!active->actor_oper_aggregator_key &&
1562 best->actor_oper_aggregator_key)) {
1564 active->is_active = 1;
1569 if (best && (best == active)) {
1571 active->is_active = 1;
1574 /* if there is new best aggregator, activate it */
1576 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1577 best->aggregator_identifier, best->num_of_ports,
1578 best->actor_oper_aggregator_key,
1579 best->partner_oper_aggregator_key,
1580 best->is_individual, best->is_active);
1581 pr_debug("best ports %p slave %p %s\n",
1582 best->lag_ports, best->slave,
1583 best->slave ? best->slave->dev->name : "NULL");
1585 bond_for_each_slave_rcu(bond, slave, iter) {
1586 agg = &(SLAVE_AD_INFO(slave).aggregator);
1588 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1589 agg->aggregator_identifier, agg->num_of_ports,
1590 agg->actor_oper_aggregator_key,
1591 agg->partner_oper_aggregator_key,
1592 agg->is_individual, agg->is_active);
1595 /* check if any partner replys */
1596 if (best->is_individual) {
1597 pr_warn("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1599 best->slave->bond->dev->name : "NULL");
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
1615 for (port = active->lag_ports; port;
1616 port = port->next_port_in_aggregator) {
1617 __disable_port(port);
1622 /* if the selected aggregator is of join individuals
1623 * (partner_system is NULL), enable their ports
1625 active = __get_active_agg(origin);
1628 if (!__agg_has_partner(active)) {
1629 for (port = active->lag_ports; port;
1630 port = port->next_port_in_aggregator) {
1631 __enable_port(port);
1638 bond_3ad_set_carrier(bond);
1642 * ad_clear_agg - clear a given aggregator's parameters
1643 * @aggregator: the aggregator we're looking at
1645 static void ad_clear_agg(struct aggregator *aggregator)
1648 aggregator->is_individual = false;
1649 aggregator->actor_admin_aggregator_key = 0;
1650 aggregator->actor_oper_aggregator_key = 0;
1651 aggregator->partner_system = null_mac_addr;
1652 aggregator->partner_system_priority = 0;
1653 aggregator->partner_oper_aggregator_key = 0;
1654 aggregator->receive_state = 0;
1655 aggregator->transmit_state = 0;
1656 aggregator->lag_ports = NULL;
1657 aggregator->is_active = 0;
1658 aggregator->num_of_ports = 0;
1659 pr_debug("LAG %d was cleared\n",
1660 aggregator->aggregator_identifier);
1665 * ad_initialize_agg - initialize a given aggregator's parameters
1666 * @aggregator: the aggregator we're looking at
1668 static void ad_initialize_agg(struct aggregator *aggregator)
1671 ad_clear_agg(aggregator);
1673 aggregator->aggregator_mac_address = null_mac_addr;
1674 aggregator->aggregator_identifier = 0;
1675 aggregator->slave = NULL;
1680 * ad_initialize_port - initialize a given port's parameters
1681 * @aggregator: the aggregator we're looking at
1682 * @lacp_fast: boolean. whether fast periodic should be used
1684 static void ad_initialize_port(struct port *port, int lacp_fast)
1686 static const struct port_params tmpl = {
1687 .system_priority = 0xffff,
1690 .port_priority = 0xff,
1693 static const struct lacpdu lacpdu = {
1695 .version_number = 0x01,
1696 .tlv_type_actor_info = 0x01,
1697 .actor_information_length = 0x14,
1698 .tlv_type_partner_info = 0x02,
1699 .partner_information_length = 0x14,
1700 .tlv_type_collector_info = 0x03,
1701 .collector_information_length = 0x10,
1702 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1706 port->actor_port_number = 1;
1707 port->actor_port_priority = 0xff;
1708 port->actor_system = null_mac_addr;
1709 port->actor_system_priority = 0xffff;
1710 port->actor_port_aggregator_identifier = 0;
1712 port->actor_admin_port_key = 1;
1713 port->actor_oper_port_key = 1;
1714 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1715 AD_STATE_LACP_ACTIVITY;
1716 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1717 AD_STATE_LACP_ACTIVITY;
1720 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1722 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1723 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1725 port->is_enabled = true;
1726 /* private parameters */
1727 port->sm_vars = 0x3;
1728 port->sm_rx_state = 0;
1729 port->sm_rx_timer_counter = 0;
1730 port->sm_periodic_state = 0;
1731 port->sm_periodic_timer_counter = 0;
1732 port->sm_mux_state = 0;
1733 port->sm_mux_timer_counter = 0;
1734 port->sm_tx_state = 0;
1735 port->sm_tx_timer_counter = 0;
1737 port->aggregator = NULL;
1738 port->next_port_in_aggregator = NULL;
1739 port->transaction_id = 0;
1741 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1746 * ad_enable_collecting_distributing - enable a port's transmit/receive
1747 * @port: the port we're looking at
1749 * Enable @port if it's in an active aggregator
1751 static void ad_enable_collecting_distributing(struct port *port)
1753 if (port->aggregator->is_active) {
1754 pr_debug("Enabling port %d(LAG %d)\n",
1755 port->actor_port_number,
1756 port->aggregator->aggregator_identifier);
1757 __enable_port(port);
1762 * ad_disable_collecting_distributing - disable a port's transmit/receive
1763 * @port: the port we're looking at
1765 static void ad_disable_collecting_distributing(struct port *port)
1767 if (port->aggregator &&
1768 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1769 &(null_mac_addr))) {
1770 pr_debug("Disabling port %d(LAG %d)\n",
1771 port->actor_port_number,
1772 port->aggregator->aggregator_identifier);
1773 __disable_port(port);
1779 * ad_marker_info_send - send a marker information frame
1780 * @port: the port we're looking at
1782 * This function does nothing since we decided not to implement send and handle
1783 * response for marker PDU's, in this stage, but only to respond to marker
1786 static void ad_marker_info_send(struct port *port)
1788 struct bond_marker marker;
1791 // fill the marker PDU with the appropriate values
1792 marker.subtype = 0x02;
1793 marker.version_number = 0x01;
1794 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1795 marker.marker_length = 0x16;
1796 // convert requester_port to Big Endian
1797 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1798 marker.requester_system = port->actor_system;
1799 // convert requester_port(u32) to Big Endian
1800 marker.requester_transaction_id =
1801 (((++port->transaction_id & 0xFF) << 24)
1802 | ((port->transaction_id & 0xFF00) << 8)
1803 | ((port->transaction_id & 0xFF0000) >> 8)
1804 | ((port->transaction_id & 0xFF000000) >> 24));
1806 marker.tlv_type_terminator = 0x00;
1807 marker.terminator_length = 0x00;
1808 for (index = 0; index < 90; index++)
1809 marker.reserved_90[index] = 0;
1811 // send the marker information
1812 if (ad_marker_send(port, &marker) >= 0) {
1813 pr_debug("Sent Marker Information on port %d\n",
1814 port->actor_port_number);
1820 * ad_marker_info_received - handle receive of a Marker information frame
1821 * @marker_info: Marker info received
1822 * @port: the port we're looking at
1824 static void ad_marker_info_received(struct bond_marker *marker_info,
1827 struct bond_marker marker;
1829 /* copy the received marker data to the response marker */
1830 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1831 /* change the marker subtype to marker response */
1832 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1834 /* send the marker response */
1835 if (ad_marker_send(port, &marker) >= 0) {
1836 pr_debug("Sent Marker Response on port %d\n",
1837 port->actor_port_number);
1842 * ad_marker_response_received - handle receive of a marker response frame
1843 * @marker: marker PDU received
1844 * @port: the port we're looking at
1846 * This function does nothing since we decided not to implement send and handle
1847 * response for marker PDU's, in this stage, but only to respond to marker
1850 static void ad_marker_response_received(struct bond_marker *marker,
1855 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1858 /* ========= AD exported functions to the main bonding code ========= */
1860 /* Check aggregators status in team every T seconds */
1861 #define AD_AGGREGATOR_SELECTION_TIMER 8
1864 * bond_3ad_initiate_agg_selection - initate aggregator selection
1865 * @bond: bonding struct
1867 * Set the aggregation selection timer, to initiate an agg selection in
1868 * the very near future. Called during first initialization, and during
1869 * any down to up transitions of the bond.
1871 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1873 BOND_AD_INFO(bond).agg_select_timer = timeout;
1876 static u16 aggregator_identifier;
1879 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1880 * @bond: bonding struct to work on
1881 * @tick_resolution: tick duration (millisecond resolution)
1883 * Can be called only after the mac address of the bond is set.
1885 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1887 /* check that the bond is not initialized yet */
1888 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1889 bond->dev->dev_addr)) {
1891 aggregator_identifier = 0;
1893 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1894 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1896 /* initialize how many times this module is called in one
1897 * second (should be about every 100ms)
1899 ad_ticks_per_sec = tick_resolution;
1901 bond_3ad_initiate_agg_selection(bond,
1902 AD_AGGREGATOR_SELECTION_TIMER *
1908 * bond_3ad_bind_slave - initialize a slave's port
1909 * @slave: slave struct to work on
1911 * Returns: 0 on success
1914 void bond_3ad_bind_slave(struct slave *slave)
1916 struct bonding *bond = bond_get_bond_by_slave(slave);
1918 struct aggregator *aggregator;
1920 /* check that the slave has not been initialized yet. */
1921 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1923 /* port initialization */
1924 port = &(SLAVE_AD_INFO(slave).port);
1926 ad_initialize_port(port, bond->params.lacp_fast);
1928 __initialize_port_locks(slave);
1929 port->slave = slave;
1930 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1931 /* key is determined according to the link speed, duplex and user key(which
1932 * is yet not supported)
1934 port->actor_admin_port_key = 0;
1935 port->actor_admin_port_key |= __get_duplex(port);
1936 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1937 port->actor_oper_port_key = port->actor_admin_port_key;
1938 /* if the port is not full duplex, then the port should be not
1941 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1942 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1943 /* actor system is the bond's system */
1944 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1945 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1946 * lacpdu's are sent in one second)
1948 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1949 port->aggregator = NULL;
1950 port->next_port_in_aggregator = NULL;
1952 __disable_port(port);
1954 /* aggregator initialization */
1955 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1957 ad_initialize_agg(aggregator);
1959 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1960 aggregator->aggregator_identifier = (++aggregator_identifier);
1961 aggregator->slave = slave;
1962 aggregator->is_active = 0;
1963 aggregator->num_of_ports = 0;
1968 * bond_3ad_unbind_slave - deinitialize a slave's port
1969 * @slave: slave struct to work on
1971 * Search for the aggregator that is related to this port, remove the
1972 * aggregator and assign another aggregator for other port related to it
1973 * (if any), and remove the port.
1975 void bond_3ad_unbind_slave(struct slave *slave)
1977 struct port *port, *prev_port, *temp_port;
1978 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1979 int select_new_active_agg = 0;
1980 struct bonding *bond = slave->bond;
1981 struct slave *slave_iter;
1982 struct list_head *iter;
1984 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1985 port = &(SLAVE_AD_INFO(slave).port);
1987 /* if slave is null, the whole port is not initialized */
1989 pr_warn("Warning: %s: Trying to unbind an uninitialized port on %s\n",
1990 slave->bond->dev->name, slave->dev->name);
1994 pr_debug("Unbinding Link Aggregation Group %d\n",
1995 aggregator->aggregator_identifier);
1997 /* Tell the partner that this port is not suitable for aggregation */
1998 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1999 __update_lacpdu_from_port(port);
2000 ad_lacpdu_send(port);
2002 /* check if this aggregator is occupied */
2003 if (aggregator->lag_ports) {
2004 /* check if there are other ports related to this aggregator
2005 * except the port related to this slave(thats ensure us that
2006 * there is a reason to search for new aggregator, and that we
2009 if ((aggregator->lag_ports != port) ||
2010 (aggregator->lag_ports->next_port_in_aggregator)) {
2011 /* find new aggregator for the related port(s) */
2012 bond_for_each_slave(bond, slave_iter, iter) {
2013 new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
2014 /* if the new aggregator is empty, or it is
2015 * connected to our port only
2017 if (!new_aggregator->lag_ports ||
2018 ((new_aggregator->lag_ports == port) &&
2019 !new_aggregator->lag_ports->next_port_in_aggregator))
2023 new_aggregator = NULL;
2025 /* if new aggregator found, copy the aggregator's
2026 * parameters and connect the related lag_ports to the
2029 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2030 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
2031 aggregator->aggregator_identifier,
2032 new_aggregator->aggregator_identifier);
2034 if ((new_aggregator->lag_ports == port) &&
2035 new_aggregator->is_active) {
2036 pr_info("%s: Removing an active aggregator\n",
2037 aggregator->slave->bond->dev->name);
2038 select_new_active_agg = 1;
2041 new_aggregator->is_individual = aggregator->is_individual;
2042 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2043 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2044 new_aggregator->partner_system = aggregator->partner_system;
2045 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2046 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2047 new_aggregator->receive_state = aggregator->receive_state;
2048 new_aggregator->transmit_state = aggregator->transmit_state;
2049 new_aggregator->lag_ports = aggregator->lag_ports;
2050 new_aggregator->is_active = aggregator->is_active;
2051 new_aggregator->num_of_ports = aggregator->num_of_ports;
2053 /* update the information that is written on
2054 * the ports about the aggregator
2056 for (temp_port = aggregator->lag_ports; temp_port;
2057 temp_port = temp_port->next_port_in_aggregator) {
2058 temp_port->aggregator = new_aggregator;
2059 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2062 ad_clear_agg(aggregator);
2064 if (select_new_active_agg)
2065 ad_agg_selection_logic(__get_first_agg(port));
2067 pr_warn("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
2068 slave->bond->dev->name);
2071 /* in case that the only port related to this
2072 * aggregator is the one we want to remove
2074 select_new_active_agg = aggregator->is_active;
2075 ad_clear_agg(aggregator);
2076 if (select_new_active_agg) {
2077 pr_info("%s: Removing an active aggregator\n",
2078 slave->bond->dev->name);
2079 /* select new active aggregator */
2080 temp_aggregator = __get_first_agg(port);
2081 if (temp_aggregator)
2082 ad_agg_selection_logic(temp_aggregator);
2087 pr_debug("Unbinding port %d\n", port->actor_port_number);
2089 /* find the aggregator that this port is connected to */
2090 bond_for_each_slave(bond, slave_iter, iter) {
2091 temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
2093 /* search the port in the aggregator's related ports */
2094 for (temp_port = temp_aggregator->lag_ports; temp_port;
2095 prev_port = temp_port,
2096 temp_port = temp_port->next_port_in_aggregator) {
2097 if (temp_port == port) {
2098 /* the aggregator found - detach the port from
2102 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2104 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2105 temp_aggregator->num_of_ports--;
2106 if (temp_aggregator->num_of_ports == 0) {
2107 select_new_active_agg = temp_aggregator->is_active;
2108 ad_clear_agg(temp_aggregator);
2109 if (select_new_active_agg) {
2110 pr_info("%s: Removing an active aggregator\n",
2111 slave->bond->dev->name);
2112 /* select new active aggregator */
2113 ad_agg_selection_logic(__get_first_agg(port));
2124 * bond_3ad_state_machine_handler - handle state machines timeout
2125 * @bond: bonding struct to work on
2127 * The state machine handling concept in this module is to check every tick
2128 * which state machine should operate any function. The execution order is
2129 * round robin, so when we have an interaction between state machines, the
2130 * reply of one to each other might be delayed until next tick.
2132 * This function also complete the initialization when the agg_select_timer
2133 * times out, and it selects an aggregator for the ports that are yet not
2134 * related to any aggregator, and selects the active aggregator for a bond.
2136 void bond_3ad_state_machine_handler(struct work_struct *work)
2138 struct bonding *bond = container_of(work, struct bonding,
2140 struct aggregator *aggregator;
2141 struct list_head *iter;
2142 struct slave *slave;
2145 read_lock(&bond->lock);
2148 /* check if there are any slaves */
2149 if (!bond_has_slaves(bond))
2152 /* check if agg_select_timer timer after initialize is timed out */
2153 if (BOND_AD_INFO(bond).agg_select_timer &&
2154 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2155 slave = bond_first_slave_rcu(bond);
2156 port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL;
2158 /* select the active aggregator for the bond */
2161 pr_warn("%s: Warning: bond's first port is uninitialized\n",
2166 aggregator = __get_first_agg(port);
2167 ad_agg_selection_logic(aggregator);
2169 bond_3ad_set_carrier(bond);
2172 /* for each port run the state machines */
2173 bond_for_each_slave_rcu(bond, slave, iter) {
2174 port = &(SLAVE_AD_INFO(slave).port);
2176 pr_warn("%s: Warning: Found an uninitialized port\n",
2181 /* Lock around state machines to protect data accessed
2182 * by all (e.g., port->sm_vars). ad_rx_machine may run
2183 * concurrently due to incoming LACPDU.
2185 __get_state_machine_lock(port);
2187 ad_rx_machine(NULL, port);
2188 ad_periodic_machine(port);
2189 ad_port_selection_logic(port);
2190 ad_mux_machine(port);
2191 ad_tx_machine(port);
2193 /* turn off the BEGIN bit, since we already handled it */
2194 if (port->sm_vars & AD_PORT_BEGIN)
2195 port->sm_vars &= ~AD_PORT_BEGIN;
2197 __release_state_machine_lock(port);
2202 read_unlock(&bond->lock);
2203 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2207 * bond_3ad_rx_indication - handle a received frame
2208 * @lacpdu: received lacpdu
2209 * @slave: slave struct to work on
2210 * @length: length of the data received
2212 * It is assumed that frames that were sent on this NIC don't returned as new
2213 * received frames (loopback). Since only the payload is given to this
2214 * function, it check for loopback.
2216 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2220 int ret = RX_HANDLER_ANOTHER;
2222 if (length >= sizeof(struct lacpdu)) {
2224 port = &(SLAVE_AD_INFO(slave).port);
2227 pr_warn("%s: Warning: port of slave %s is uninitialized\n",
2228 slave->dev->name, slave->bond->dev->name);
2232 switch (lacpdu->subtype) {
2233 case AD_TYPE_LACPDU:
2234 ret = RX_HANDLER_CONSUMED;
2235 pr_debug("Received LACPDU on port %d\n",
2236 port->actor_port_number);
2237 /* Protect against concurrent state machines */
2238 __get_state_machine_lock(port);
2239 ad_rx_machine(lacpdu, port);
2240 __release_state_machine_lock(port);
2243 case AD_TYPE_MARKER:
2244 ret = RX_HANDLER_CONSUMED;
2245 /* No need to convert fields to Little Endian since we
2246 * don't use the marker's fields.
2249 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2250 case AD_MARKER_INFORMATION_SUBTYPE:
2251 pr_debug("Received Marker Information on port %d\n",
2252 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",
2258 port->actor_port_number);
2259 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2263 pr_debug("Received an unknown Marker subtype on slot %d\n",
2264 port->actor_port_number);
2272 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2273 * @slave: slave struct to work on
2275 * Handle reselection of aggregator (if needed) for this port.
2277 void bond_3ad_adapter_speed_changed(struct slave *slave)
2281 port = &(SLAVE_AD_INFO(slave).port);
2283 /* if slave is null, the whole port is not initialized */
2285 pr_warn("Warning: %s: speed changed for uninitialized port on %s\n",
2286 slave->bond->dev->name, slave->dev->name);
2290 __get_state_machine_lock(port);
2292 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2293 port->actor_oper_port_key = port->actor_admin_port_key |=
2294 (__get_link_speed(port) << 1);
2295 pr_debug("Port %d changed speed\n", port->actor_port_number);
2296 /* there is no need to reselect a new aggregator, just signal the
2297 * state machines to reinitialize
2299 port->sm_vars |= AD_PORT_BEGIN;
2301 __release_state_machine_lock(port);
2305 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2306 * @slave: slave struct to work on
2308 * Handle reselection of aggregator (if needed) for this port.
2310 void bond_3ad_adapter_duplex_changed(struct slave *slave)
2314 port = &(SLAVE_AD_INFO(slave).port);
2316 /* if slave is null, the whole port is not initialized */
2318 pr_warn("%s: Warning: duplex changed for uninitialized port on %s\n",
2319 slave->bond->dev->name, slave->dev->name);
2323 __get_state_machine_lock(port);
2325 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2326 port->actor_oper_port_key = port->actor_admin_port_key |=
2328 pr_debug("Port %d changed duplex\n", port->actor_port_number);
2329 /* there is no need to reselect a new aggregator, just signal the
2330 * state machines to reinitialize
2332 port->sm_vars |= AD_PORT_BEGIN;
2334 __release_state_machine_lock(port);
2338 * bond_3ad_handle_link_change - handle a slave's link status change indication
2339 * @slave: slave struct to work on
2340 * @status: whether the link is now up or down
2342 * Handle reselection of aggregator (if needed) for this port.
2344 void bond_3ad_handle_link_change(struct slave *slave, char link)
2348 port = &(SLAVE_AD_INFO(slave).port);
2350 /* if slave is null, the whole port is not initialized */
2352 pr_warn("Warning: %s: link status changed for uninitialized port on %s\n",
2353 slave->bond->dev->name, slave->dev->name);
2357 __get_state_machine_lock(port);
2358 /* on link down we are zeroing duplex and speed since
2359 * some of the adaptors(ce1000.lan) report full duplex/speed
2360 * instead of N/A(duplex) / 0(speed).
2362 * on link up we are forcing recheck on the duplex and speed since
2363 * some of he adaptors(ce1000.lan) report.
2365 if (link == BOND_LINK_UP) {
2366 port->is_enabled = true;
2367 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2368 port->actor_oper_port_key = port->actor_admin_port_key |=
2370 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2371 port->actor_oper_port_key = port->actor_admin_port_key |=
2372 (__get_link_speed(port) << 1);
2374 /* link has failed */
2375 port->is_enabled = false;
2376 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2377 port->actor_oper_port_key = (port->actor_admin_port_key &=
2378 ~AD_SPEED_KEY_BITS);
2380 pr_debug("Port %d changed link status to %s",
2381 port->actor_port_number,
2382 (link == BOND_LINK_UP) ? "UP" : "DOWN");
2383 /* there is no need to reselect a new aggregator, just signal the
2384 * state machines to reinitialize
2386 port->sm_vars |= AD_PORT_BEGIN;
2388 __release_state_machine_lock(port);
2392 * bond_3ad_set_carrier - set link state for bonding master
2393 * @bond - bonding structure
2395 * if we have an active aggregator, we're up, if not, we're down.
2396 * Presumes that we cannot have an active aggregator if there are
2397 * no slaves with link up.
2399 * This behavior complies with IEEE 802.3 section 43.3.9.
2401 * Called by bond_set_carrier(). Return zero if carrier state does not
2402 * change, nonzero if it does.
2404 int bond_3ad_set_carrier(struct bonding *bond)
2406 struct aggregator *active;
2407 struct slave *first_slave;
2410 first_slave = bond_first_slave_rcu(bond);
2414 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator));
2416 /* are enough slaves available to consider link up? */
2417 if (active->num_of_ports < bond->params.min_links) {
2418 if (netif_carrier_ok(bond->dev)) {
2419 netif_carrier_off(bond->dev);
2422 } else if (!netif_carrier_ok(bond->dev)) {
2423 netif_carrier_on(bond->dev);
2429 if (netif_carrier_ok(bond->dev)) {
2430 netif_carrier_off(bond->dev);
2437 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2438 * @bond: bonding struct to work on
2439 * @ad_info: ad_info struct to fill with the bond's info
2441 * Returns: 0 on success
2444 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2445 struct ad_info *ad_info)
2447 struct aggregator *aggregator = NULL;
2448 struct list_head *iter;
2449 struct slave *slave;
2452 bond_for_each_slave_rcu(bond, slave, iter) {
2453 port = &(SLAVE_AD_INFO(slave).port);
2454 if (port->aggregator && port->aggregator->is_active) {
2455 aggregator = port->aggregator;
2461 ad_info->aggregator_id = aggregator->aggregator_identifier;
2462 ad_info->ports = aggregator->num_of_ports;
2463 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2464 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2465 memcpy(ad_info->partner_system,
2466 aggregator->partner_system.mac_addr_value, ETH_ALEN);
2473 /* Wrapper used to hold bond->lock so no slave manipulation can occur */
2474 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2479 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2485 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2487 struct bonding *bond = netdev_priv(dev);
2488 struct slave *slave, *first_ok_slave;
2489 struct aggregator *agg;
2490 struct ad_info ad_info;
2491 struct list_head *iter;
2496 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
2497 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
2502 slaves_in_agg = ad_info.ports;
2503 agg_id = ad_info.aggregator_id;
2505 if (slaves_in_agg == 0) {
2506 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
2510 slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg);
2511 first_ok_slave = NULL;
2513 bond_for_each_slave_rcu(bond, slave, iter) {
2514 agg = SLAVE_AD_INFO(slave).port.aggregator;
2515 if (!agg || agg->aggregator_identifier != agg_id)
2518 if (slave_agg_no >= 0) {
2519 if (!first_ok_slave && SLAVE_IS_OK(slave))
2520 first_ok_slave = slave;
2525 if (SLAVE_IS_OK(slave)) {
2526 bond_dev_queue_xmit(bond, skb, slave->dev);
2531 if (slave_agg_no >= 0) {
2532 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2537 /* we couldn't find any suitable slave after the agg_no, so use the
2538 * first suitable found, if found.
2541 bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
2546 return NETDEV_TX_OK;
2548 /* no suitable interface, frame not sent */
2553 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2554 struct slave *slave)
2556 int ret = RX_HANDLER_ANOTHER;
2557 struct lacpdu *lacpdu, _lacpdu;
2559 if (skb->protocol != PKT_TYPE_LACPDU)
2562 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2566 read_lock(&bond->lock);
2567 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len);
2568 read_unlock(&bond->lock);
2573 * bond_3ad_update_lacp_rate - change the lacp rate
2574 * @bond - bonding struct
2576 * When modify lacp_rate parameter via sysfs,
2577 * update actor_oper_port_state of each port.
2579 * Hold slave->state_machine_lock,
2580 * so we can modify port->actor_oper_port_state,
2581 * no matter bond is up or down.
2583 void bond_3ad_update_lacp_rate(struct bonding *bond)
2585 struct port *port = NULL;
2586 struct list_head *iter;
2587 struct slave *slave;
2590 lacp_fast = bond->params.lacp_fast;
2591 bond_for_each_slave(bond, slave, iter) {
2592 port = &(SLAVE_AD_INFO(slave).port);
2593 __get_state_machine_lock(port);
2595 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2597 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2598 __release_state_machine_lock(port);