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
146 * The caller must hold RCU or RTNL lock.
148 static inline struct aggregator *__get_first_agg(struct port *port)
150 struct bonding *bond = __get_bond_by_port(port);
151 struct slave *first_slave;
152 struct aggregator *agg;
154 /* If there's no bond for this port, or bond has no slaves */
159 first_slave = bond_first_slave_rcu(bond);
160 agg = first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL;
167 * __agg_has_partner - see if we have a partner
168 * @agg: the agregator we're looking at
170 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
171 * address for the partner). Return 0 if not.
173 static inline int __agg_has_partner(struct aggregator *agg)
175 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
179 * __disable_port - disable the port's slave
180 * @port: the port we're looking at
182 static inline void __disable_port(struct port *port)
184 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
188 * __enable_port - enable the port's slave, if it's up
189 * @port: the port we're looking at
191 static inline void __enable_port(struct port *port)
193 struct slave *slave = port->slave;
195 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
196 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
200 * __port_is_enabled - check if the port's slave is in active state
201 * @port: the port we're looking at
203 static inline int __port_is_enabled(struct port *port)
205 return bond_is_active_slave(port->slave);
209 * __get_agg_selection_mode - get the aggregator selection mode
210 * @port: the port we're looking at
212 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
214 static inline u32 __get_agg_selection_mode(struct port *port)
216 struct bonding *bond = __get_bond_by_port(port);
219 return BOND_AD_STABLE;
221 return bond->params.ad_select;
225 * __check_agg_selection_timer - check if the selection timer has expired
226 * @port: the port we're looking at
228 static inline int __check_agg_selection_timer(struct port *port)
230 struct bonding *bond = __get_bond_by_port(port);
235 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
239 * __get_state_machine_lock - lock the port's state machines
240 * @port: the port we're looking at
242 static inline void __get_state_machine_lock(struct port *port)
244 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
248 * __release_state_machine_lock - unlock the port's state machines
249 * @port: the port we're looking at
251 static inline void __release_state_machine_lock(struct port *port)
253 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
257 * __get_link_speed - get a port's speed
258 * @port: the port we're looking at
260 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
262 * %AD_LINK_SPEED_BITMASK_10MBPS,
263 * %AD_LINK_SPEED_BITMASK_100MBPS,
264 * %AD_LINK_SPEED_BITMASK_1000MBPS,
265 * %AD_LINK_SPEED_BITMASK_10000MBPS
267 static u16 __get_link_speed(struct port *port)
269 struct slave *slave = port->slave;
272 /* this if covers only a special case: when the configuration starts
273 * with link down, it sets the speed to 0.
274 * This is done in spite of the fact that the e100 driver reports 0
275 * to be compatible with MVT in the future.
277 if (slave->link != BOND_LINK_UP)
280 switch (slave->speed) {
282 speed = AD_LINK_SPEED_BITMASK_10MBPS;
286 speed = AD_LINK_SPEED_BITMASK_100MBPS;
290 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
294 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
298 /* unknown speed value from ethtool. shouldn't happen */
304 pr_debug("Port %d Received link speed %d update from adapter\n",
305 port->actor_port_number, speed);
310 * __get_duplex - get a port's duplex
311 * @port: the port we're looking at
313 * Return @port's duplex in 802.3ad bitmask format. i.e.:
314 * 0x01 if in full duplex
317 static u8 __get_duplex(struct port *port)
319 struct slave *slave = port->slave;
323 /* handling a special case: when the configuration starts with
324 * link down, it sets the duplex to 0.
326 if (slave->link != BOND_LINK_UP)
329 switch (slave->duplex) {
332 pr_debug("Port %d Received status full duplex update from adapter\n",
333 port->actor_port_number);
338 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
339 port->actor_port_number);
347 * __initialize_port_locks - initialize a port's STATE machine spinlock
348 * @port: the slave of the port we're looking at
350 static inline void __initialize_port_locks(struct slave *slave)
352 /* make sure it isn't called twice */
353 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock));
359 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
360 * @timer_type: which timer to operate
361 * @par: timer parameter. see below
363 * If @timer_type is %current_while_timer, @par indicates long/short timer.
364 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
365 * %SLOW_PERIODIC_TIME.
367 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
369 u16 retval = 0; /* to silence the compiler */
371 switch (timer_type) {
372 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
374 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
376 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
378 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
379 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
381 case AD_PERIODIC_TIMER: /* for periodic machine */
382 retval = (par*ad_ticks_per_sec); /* long timeout */
384 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
385 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
387 case AD_WAIT_WHILE_TIMER: /* for selection machine */
388 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
396 /* ================= ad_rx_machine helper functions ================== */
399 * __choose_matched - update a port's matched variable from a received lacpdu
400 * @lacpdu: the lacpdu we've received
401 * @port: the port we're looking at
403 * Update the value of the matched variable, using parameter values from a
404 * newly received lacpdu. Parameter values for the partner carried in the
405 * received PDU are compared with the corresponding operational parameter
406 * values for the actor. Matched is set to TRUE if all of these parameters
407 * match and the PDU parameter partner_state.aggregation has the same value as
408 * actor_oper_port_state.aggregation and lacp will actively maintain the link
409 * in the aggregation. Matched is also set to TRUE if the value of
410 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
411 * an individual link and lacp will actively maintain the link. Otherwise,
412 * matched is set to FALSE. LACP is considered to be actively maintaining the
413 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
414 * the actor's actor_oper_port_state.lacp_activity and the PDU's
415 * partner_state.lacp_activity variables are TRUE.
417 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
418 * used here to implement the language from 802.3ad 43.4.9 that requires
419 * recordPDU to "match" the LACPDU parameters to the stored values.
421 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
423 /* check if all parameters are alike
424 * or this is individual link(aggregation == FALSE)
425 * then update the state machine Matched variable.
427 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
428 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
429 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
430 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
431 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
432 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
433 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
435 port->sm_vars |= AD_PORT_MATCHED;
437 port->sm_vars &= ~AD_PORT_MATCHED;
442 * __record_pdu - record parameters from a received lacpdu
443 * @lacpdu: the lacpdu we've received
444 * @port: the port we're looking at
446 * Record the parameter values for the Actor carried in a received lacpdu as
447 * the current partner operational parameter values and sets
448 * actor_oper_port_state.defaulted to FALSE.
450 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
452 if (lacpdu && port) {
453 struct port_params *partner = &port->partner_oper;
455 __choose_matched(lacpdu, port);
456 /* record the new parameter values for the partner
459 partner->port_number = ntohs(lacpdu->actor_port);
460 partner->port_priority = ntohs(lacpdu->actor_port_priority);
461 partner->system = lacpdu->actor_system;
462 partner->system_priority = ntohs(lacpdu->actor_system_priority);
463 partner->key = ntohs(lacpdu->actor_key);
464 partner->port_state = lacpdu->actor_state;
466 /* set actor_oper_port_state.defaulted to FALSE */
467 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
469 /* set the partner sync. to on if the partner is sync,
470 * and the port is matched
472 if ((port->sm_vars & AD_PORT_MATCHED)
473 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
474 partner->port_state |= AD_STATE_SYNCHRONIZATION;
476 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
481 * __record_default - record default parameters
482 * @port: the port we're looking at
484 * This function records the default parameter values for the partner carried
485 * in the Partner Admin parameters as the current partner operational parameter
486 * values and sets actor_oper_port_state.defaulted to TRUE.
488 static void __record_default(struct port *port)
491 /* record the partner admin parameters */
492 memcpy(&port->partner_oper, &port->partner_admin,
493 sizeof(struct port_params));
495 /* set actor_oper_port_state.defaulted to true */
496 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
501 * __update_selected - update a port's Selected variable from a received lacpdu
502 * @lacpdu: the lacpdu we've received
503 * @port: the port we're looking at
505 * Update the value of the selected variable, using parameter values from a
506 * newly received lacpdu. The parameter values for the Actor carried in the
507 * received PDU are compared with the corresponding operational parameter
508 * values for the ports partner. If one or more of the comparisons shows that
509 * the value(s) received in the PDU differ from the current operational values,
510 * then selected is set to FALSE and actor_oper_port_state.synchronization is
511 * set to out_of_sync. Otherwise, selected remains unchanged.
513 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
515 if (lacpdu && port) {
516 const struct port_params *partner = &port->partner_oper;
518 /* check if any parameter is different then
519 * update the state machine selected variable.
521 if (ntohs(lacpdu->actor_port) != partner->port_number ||
522 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
523 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
524 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
525 ntohs(lacpdu->actor_key) != partner->key ||
526 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
527 port->sm_vars &= ~AD_PORT_SELECTED;
533 * __update_default_selected - update a port's Selected variable from Partner
534 * @port: the port we're looking at
536 * This function updates the value of the selected variable, using the partner
537 * administrative parameter values. The administrative values are compared with
538 * the corresponding operational parameter values for the partner. If one or
539 * more of the comparisons shows that the administrative value(s) differ from
540 * the current operational values, then Selected is set to FALSE and
541 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
542 * Selected remains unchanged.
544 static void __update_default_selected(struct port *port)
547 const struct port_params *admin = &port->partner_admin;
548 const struct port_params *oper = &port->partner_oper;
550 /* check if any parameter is different then
551 * update the state machine selected variable.
553 if (admin->port_number != oper->port_number ||
554 admin->port_priority != oper->port_priority ||
555 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
556 admin->system_priority != oper->system_priority ||
557 admin->key != oper->key ||
558 (admin->port_state & AD_STATE_AGGREGATION)
559 != (oper->port_state & AD_STATE_AGGREGATION)) {
560 port->sm_vars &= ~AD_PORT_SELECTED;
566 * __update_ntt - update a port's ntt variable from a received lacpdu
567 * @lacpdu: the lacpdu we've received
568 * @port: the port we're looking at
570 * Updates the value of the ntt variable, using parameter values from a newly
571 * received lacpdu. The parameter values for the partner carried in the
572 * received PDU are compared with the corresponding operational parameter
573 * values for the Actor. If one or more of the comparisons shows that the
574 * value(s) received in the PDU differ from the current operational values,
575 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
577 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
579 /* validate lacpdu and port */
580 if (lacpdu && port) {
581 /* check if any parameter is different then
582 * update the port->ntt.
584 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
585 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
586 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
587 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
588 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
589 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
590 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
591 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
592 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
600 * __agg_ports_are_ready - check if all ports in an aggregator are ready
601 * @aggregator: the aggregator we're looking at
604 static int __agg_ports_are_ready(struct aggregator *aggregator)
610 /* scan all ports in this aggregator to verfy if they are
613 for (port = aggregator->lag_ports;
615 port = port->next_port_in_aggregator) {
616 if (!(port->sm_vars & AD_PORT_READY_N)) {
627 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
628 * @aggregator: the aggregator we're looking at
629 * @val: Should the ports' ready bit be set on or off
632 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
636 for (port = aggregator->lag_ports; port;
637 port = port->next_port_in_aggregator) {
639 port->sm_vars |= AD_PORT_READY;
641 port->sm_vars &= ~AD_PORT_READY;
646 * __get_agg_bandwidth - get the total bandwidth of an aggregator
647 * @aggregator: the aggregator we're looking at
650 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
654 if (aggregator->num_of_ports) {
655 switch (__get_link_speed(aggregator->lag_ports)) {
656 case AD_LINK_SPEED_BITMASK_1MBPS:
657 bandwidth = aggregator->num_of_ports;
659 case AD_LINK_SPEED_BITMASK_10MBPS:
660 bandwidth = aggregator->num_of_ports * 10;
662 case AD_LINK_SPEED_BITMASK_100MBPS:
663 bandwidth = aggregator->num_of_ports * 100;
665 case AD_LINK_SPEED_BITMASK_1000MBPS:
666 bandwidth = aggregator->num_of_ports * 1000;
668 case AD_LINK_SPEED_BITMASK_10000MBPS:
669 bandwidth = aggregator->num_of_ports * 10000;
672 bandwidth = 0; /* to silence the compiler */
679 * __get_active_agg - get the current active aggregator
680 * @aggregator: the aggregator we're looking at
682 * Caller must hold RCU lock.
684 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
686 struct bonding *bond = aggregator->slave->bond;
687 struct list_head *iter;
690 bond_for_each_slave_rcu(bond, slave, iter)
691 if (SLAVE_AD_INFO(slave).aggregator.is_active)
692 return &(SLAVE_AD_INFO(slave).aggregator);
698 * __update_lacpdu_from_port - update a port's lacpdu fields
699 * @port: the port we're looking at
701 static inline void __update_lacpdu_from_port(struct port *port)
703 struct lacpdu *lacpdu = &port->lacpdu;
704 const struct port_params *partner = &port->partner_oper;
706 /* update current actual Actor parameters
707 * lacpdu->subtype initialized
708 * lacpdu->version_number initialized
709 * lacpdu->tlv_type_actor_info initialized
710 * lacpdu->actor_information_length initialized
713 lacpdu->actor_system_priority = htons(port->actor_system_priority);
714 lacpdu->actor_system = port->actor_system;
715 lacpdu->actor_key = htons(port->actor_oper_port_key);
716 lacpdu->actor_port_priority = htons(port->actor_port_priority);
717 lacpdu->actor_port = htons(port->actor_port_number);
718 lacpdu->actor_state = port->actor_oper_port_state;
720 /* lacpdu->reserved_3_1 initialized
721 * lacpdu->tlv_type_partner_info initialized
722 * lacpdu->partner_information_length initialized
725 lacpdu->partner_system_priority = htons(partner->system_priority);
726 lacpdu->partner_system = partner->system;
727 lacpdu->partner_key = htons(partner->key);
728 lacpdu->partner_port_priority = htons(partner->port_priority);
729 lacpdu->partner_port = htons(partner->port_number);
730 lacpdu->partner_state = partner->port_state;
732 /* lacpdu->reserved_3_2 initialized
733 * lacpdu->tlv_type_collector_info initialized
734 * lacpdu->collector_information_length initialized
735 * collector_max_delay initialized
736 * reserved_12[12] initialized
737 * tlv_type_terminator initialized
738 * terminator_length initialized
739 * reserved_50[50] initialized
743 /* ================= main 802.3ad protocol code ========================= */
746 * ad_lacpdu_send - send out a lacpdu packet on a given port
747 * @port: the port we're looking at
749 * Returns: 0 on success
752 static int ad_lacpdu_send(struct port *port)
754 struct slave *slave = port->slave;
756 struct lacpdu_header *lacpdu_header;
757 int length = sizeof(struct lacpdu_header);
759 skb = dev_alloc_skb(length);
763 skb->dev = slave->dev;
764 skb_reset_mac_header(skb);
765 skb->network_header = skb->mac_header + ETH_HLEN;
766 skb->protocol = PKT_TYPE_LACPDU;
767 skb->priority = TC_PRIO_CONTROL;
769 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
771 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
772 /* Note: source address is set to be the member's PERMANENT address,
773 * because we use it to identify loopback lacpdus in receive.
775 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
776 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
778 lacpdu_header->lacpdu = port->lacpdu;
786 * ad_marker_send - send marker information/response on a given port
787 * @port: the port we're looking at
788 * @marker: marker data to send
790 * Returns: 0 on success
793 static int ad_marker_send(struct port *port, struct bond_marker *marker)
795 struct slave *slave = port->slave;
797 struct bond_marker_header *marker_header;
798 int length = sizeof(struct bond_marker_header);
800 skb = dev_alloc_skb(length + 16);
804 skb_reserve(skb, 16);
806 skb->dev = slave->dev;
807 skb_reset_mac_header(skb);
808 skb->network_header = skb->mac_header + ETH_HLEN;
809 skb->protocol = PKT_TYPE_LACPDU;
811 marker_header = (struct bond_marker_header *)skb_put(skb, length);
813 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
814 /* Note: source address is set to be the member's PERMANENT address,
815 * because we use it to identify loopback MARKERs in receive.
817 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
818 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
820 marker_header->marker = *marker;
828 * ad_mux_machine - handle a port's mux state machine
829 * @port: the port we're looking at
831 static void ad_mux_machine(struct port *port)
833 mux_states_t last_state;
835 /* keep current State Machine state to compare later if it was
838 last_state = port->sm_mux_state;
840 if (port->sm_vars & AD_PORT_BEGIN) {
841 port->sm_mux_state = AD_MUX_DETACHED;
843 switch (port->sm_mux_state) {
844 case AD_MUX_DETACHED:
845 if ((port->sm_vars & AD_PORT_SELECTED)
846 || (port->sm_vars & AD_PORT_STANDBY))
847 /* if SELECTED or STANDBY */
848 port->sm_mux_state = AD_MUX_WAITING;
851 /* if SELECTED == FALSE return to DETACH state */
852 if (!(port->sm_vars & AD_PORT_SELECTED)) {
853 port->sm_vars &= ~AD_PORT_READY_N;
854 /* in order to withhold the Selection Logic to
855 * check all ports READY_N value every callback
856 * cycle to update ready variable, we check
857 * READY_N and update READY here
859 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
860 port->sm_mux_state = AD_MUX_DETACHED;
864 /* check if the wait_while_timer expired */
865 if (port->sm_mux_timer_counter
866 && !(--port->sm_mux_timer_counter))
867 port->sm_vars |= AD_PORT_READY_N;
869 /* in order to withhold the selection logic to check
870 * all ports READY_N value every callback cycle to
871 * update ready variable, we check READY_N and update
874 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
876 /* if the wait_while_timer expired, and the port is
877 * in READY state, move to ATTACHED state
879 if ((port->sm_vars & AD_PORT_READY)
880 && !port->sm_mux_timer_counter)
881 port->sm_mux_state = AD_MUX_ATTACHED;
883 case AD_MUX_ATTACHED:
884 /* check also if agg_select_timer expired (so the
885 * edable port will take place only after this timer)
887 if ((port->sm_vars & AD_PORT_SELECTED) &&
888 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
889 !__check_agg_selection_timer(port)) {
890 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;
891 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
892 (port->sm_vars & AD_PORT_STANDBY)) {
893 /* if UNSELECTED or STANDBY */
894 port->sm_vars &= ~AD_PORT_READY_N;
895 /* in order to withhold the selection logic to
896 * check all ports READY_N value every callback
897 * cycle to update ready variable, we check
898 * READY_N and update READY here
900 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
901 port->sm_mux_state = AD_MUX_DETACHED;
904 case AD_MUX_COLLECTING_DISTRIBUTING:
905 if (!(port->sm_vars & AD_PORT_SELECTED) ||
906 (port->sm_vars & AD_PORT_STANDBY) ||
907 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) {
908 port->sm_mux_state = AD_MUX_ATTACHED;
910 /* if port state hasn't changed make
911 * sure that a collecting distributing
912 * port in an active aggregator is enabled
914 if (port->aggregator &&
915 port->aggregator->is_active &&
916 !__port_is_enabled(port)) {
927 /* check if the state machine was changed */
928 if (port->sm_mux_state != last_state) {
929 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
930 port->actor_port_number, last_state,
932 switch (port->sm_mux_state) {
933 case AD_MUX_DETACHED:
934 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
935 ad_disable_collecting_distributing(port);
936 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
937 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
941 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
943 case AD_MUX_ATTACHED:
944 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
945 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
946 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
947 ad_disable_collecting_distributing(port);
950 case AD_MUX_COLLECTING_DISTRIBUTING:
951 port->actor_oper_port_state |= AD_STATE_COLLECTING;
952 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
953 ad_enable_collecting_distributing(port);
963 * ad_rx_machine - handle a port's rx State Machine
964 * @lacpdu: the lacpdu we've received
965 * @port: the port we're looking at
967 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
968 * CURRENT. If timer expired set the state machine in the proper state.
969 * In other cases, this function checks if we need to switch to other state.
971 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
973 rx_states_t last_state;
975 /* keep current State Machine state to compare later if it was
978 last_state = port->sm_rx_state;
980 /* check if state machine should change state */
982 /* first, check if port was reinitialized */
983 if (port->sm_vars & AD_PORT_BEGIN)
984 port->sm_rx_state = AD_RX_INITIALIZE;
985 /* check if port is not enabled */
986 else if (!(port->sm_vars & AD_PORT_BEGIN)
987 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
988 port->sm_rx_state = AD_RX_PORT_DISABLED;
989 /* check if new lacpdu arrived */
990 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
991 (port->sm_rx_state == AD_RX_DEFAULTED) ||
992 (port->sm_rx_state == AD_RX_CURRENT))) {
993 port->sm_rx_timer_counter = 0;
994 port->sm_rx_state = AD_RX_CURRENT;
996 /* if timer is on, and if it is expired */
997 if (port->sm_rx_timer_counter &&
998 !(--port->sm_rx_timer_counter)) {
999 switch (port->sm_rx_state) {
1001 port->sm_rx_state = AD_RX_DEFAULTED;
1004 port->sm_rx_state = AD_RX_EXPIRED;
1010 /* if no lacpdu arrived and no timer is on */
1011 switch (port->sm_rx_state) {
1012 case AD_RX_PORT_DISABLED:
1013 if (port->sm_vars & AD_PORT_MOVED)
1014 port->sm_rx_state = AD_RX_INITIALIZE;
1015 else if (port->is_enabled
1017 & AD_PORT_LACP_ENABLED))
1018 port->sm_rx_state = AD_RX_EXPIRED;
1019 else if (port->is_enabled
1021 & AD_PORT_LACP_ENABLED) == 0))
1022 port->sm_rx_state = AD_RX_LACP_DISABLED;
1031 /* check if the State machine was changed or new lacpdu arrived */
1032 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1033 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1034 port->actor_port_number, last_state,
1036 switch (port->sm_rx_state) {
1037 case AD_RX_INITIALIZE:
1038 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1039 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1041 port->sm_vars |= AD_PORT_LACP_ENABLED;
1042 port->sm_vars &= ~AD_PORT_SELECTED;
1043 __record_default(port);
1044 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1045 port->sm_vars &= ~AD_PORT_MOVED;
1046 port->sm_rx_state = AD_RX_PORT_DISABLED;
1049 case AD_RX_PORT_DISABLED:
1050 port->sm_vars &= ~AD_PORT_MATCHED;
1052 case AD_RX_LACP_DISABLED:
1053 port->sm_vars &= ~AD_PORT_SELECTED;
1054 __record_default(port);
1055 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1056 port->sm_vars |= AD_PORT_MATCHED;
1057 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1060 /* Reset of the Synchronization flag (Standard 43.4.12)
1061 * This reset cause to disable this port in the
1062 * COLLECTING_DISTRIBUTING state of the mux machine in
1063 * case of EXPIRED even if LINK_DOWN didn't arrive for
1066 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1067 port->sm_vars &= ~AD_PORT_MATCHED;
1068 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1069 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1070 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1072 case AD_RX_DEFAULTED:
1073 __update_default_selected(port);
1074 __record_default(port);
1075 port->sm_vars |= AD_PORT_MATCHED;
1076 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1079 /* detect loopback situation */
1080 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1081 &(port->actor_system))) {
1082 pr_err("%s: An illegal loopback occurred on adapter (%s)\n"
1083 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1084 port->slave->bond->dev->name,
1085 port->slave->dev->name);
1088 __update_selected(lacpdu, port);
1089 __update_ntt(lacpdu, port);
1090 __record_pdu(lacpdu, port);
1091 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1101 * ad_tx_machine - handle a port's tx state machine
1102 * @port: the port we're looking at
1104 static void ad_tx_machine(struct port *port)
1106 /* check if tx timer expired, to verify that we do not send more than
1107 * 3 packets per second
1109 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1110 /* check if there is something to send */
1111 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1112 __update_lacpdu_from_port(port);
1114 if (ad_lacpdu_send(port) >= 0) {
1115 pr_debug("Sent LACPDU on port %d\n",
1116 port->actor_port_number);
1118 /* mark ntt as false, so it will not be sent
1119 * again until demanded
1124 /* restart tx timer(to verify that we will not exceed
1125 * AD_MAX_TX_IN_SECOND
1127 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1132 * ad_periodic_machine - handle a port's periodic state machine
1133 * @port: the port we're looking at
1135 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1137 static void ad_periodic_machine(struct port *port)
1139 periodic_states_t last_state;
1141 /* keep current state machine state to compare later if it was changed */
1142 last_state = port->sm_periodic_state;
1144 /* check if port was reinitialized */
1145 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1146 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1148 port->sm_periodic_state = AD_NO_PERIODIC;
1150 /* check if state machine should change state */
1151 else if (port->sm_periodic_timer_counter) {
1152 /* check if periodic state machine expired */
1153 if (!(--port->sm_periodic_timer_counter)) {
1154 /* if expired then do tx */
1155 port->sm_periodic_state = AD_PERIODIC_TX;
1157 /* If not expired, check if there is some new timeout
1158 * parameter from the partner state
1160 switch (port->sm_periodic_state) {
1161 case AD_FAST_PERIODIC:
1162 if (!(port->partner_oper.port_state
1163 & AD_STATE_LACP_TIMEOUT))
1164 port->sm_periodic_state = AD_SLOW_PERIODIC;
1166 case AD_SLOW_PERIODIC:
1167 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1168 port->sm_periodic_timer_counter = 0;
1169 port->sm_periodic_state = AD_PERIODIC_TX;
1177 switch (port->sm_periodic_state) {
1178 case AD_NO_PERIODIC:
1179 port->sm_periodic_state = AD_FAST_PERIODIC;
1181 case AD_PERIODIC_TX:
1182 if (!(port->partner_oper.port_state &
1183 AD_STATE_LACP_TIMEOUT))
1184 port->sm_periodic_state = AD_SLOW_PERIODIC;
1186 port->sm_periodic_state = AD_FAST_PERIODIC;
1193 /* check if the state machine was changed */
1194 if (port->sm_periodic_state != last_state) {
1195 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1196 port->actor_port_number, last_state,
1197 port->sm_periodic_state);
1198 switch (port->sm_periodic_state) {
1199 case AD_NO_PERIODIC:
1200 port->sm_periodic_timer_counter = 0;
1202 case AD_FAST_PERIODIC:
1203 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1204 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1206 case AD_SLOW_PERIODIC:
1207 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1208 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1210 case AD_PERIODIC_TX:
1220 * ad_port_selection_logic - select aggregation groups
1221 * @port: the port we're looking at
1223 * Select aggregation groups, and assign each port for it's aggregetor. The
1224 * selection logic is called in the inititalization (after all the handshkes),
1225 * and after every lacpdu receive (if selected is off).
1227 static void ad_port_selection_logic(struct port *port)
1229 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1230 struct port *last_port = NULL, *curr_port;
1231 struct list_head *iter;
1232 struct bonding *bond;
1233 struct slave *slave;
1236 /* if the port is already Selected, do nothing */
1237 if (port->sm_vars & AD_PORT_SELECTED)
1240 bond = __get_bond_by_port(port);
1242 /* if the port is connected to other aggregator, detach it */
1243 if (port->aggregator) {
1244 /* detach the port from its former aggregator */
1245 temp_aggregator = port->aggregator;
1246 for (curr_port = temp_aggregator->lag_ports; curr_port;
1247 last_port = curr_port,
1248 curr_port = curr_port->next_port_in_aggregator) {
1249 if (curr_port == port) {
1250 temp_aggregator->num_of_ports--;
1251 /* if it is the first port attached to the
1255 temp_aggregator->lag_ports =
1256 port->next_port_in_aggregator;
1258 /* not the first port attached to the
1261 last_port->next_port_in_aggregator =
1262 port->next_port_in_aggregator;
1265 /* clear the port's relations to this
1268 port->aggregator = NULL;
1269 port->next_port_in_aggregator = NULL;
1270 port->actor_port_aggregator_identifier = 0;
1272 pr_debug("Port %d left LAG %d\n",
1273 port->actor_port_number,
1274 temp_aggregator->aggregator_identifier);
1275 /* if the aggregator is empty, clear its
1276 * parameters, and set it ready to be attached
1278 if (!temp_aggregator->lag_ports)
1279 ad_clear_agg(temp_aggregator);
1284 /* meaning: the port was related to an aggregator
1285 * but was not on the aggregator port list
1287 pr_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1288 port->slave->bond->dev->name,
1289 port->actor_port_number,
1290 port->slave->dev->name,
1291 port->aggregator->aggregator_identifier);
1294 /* search on all aggregators for a suitable aggregator for this port */
1295 bond_for_each_slave(bond, slave, iter) {
1296 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1298 /* keep a free aggregator for later use(if needed) */
1299 if (!aggregator->lag_ports) {
1300 if (!free_aggregator)
1301 free_aggregator = aggregator;
1304 /* check if current aggregator suits us */
1305 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1306 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1307 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1308 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1310 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1311 !aggregator->is_individual) /* but is not individual OR */
1314 /* attach to the founded aggregator */
1315 port->aggregator = aggregator;
1316 port->actor_port_aggregator_identifier =
1317 port->aggregator->aggregator_identifier;
1318 port->next_port_in_aggregator = aggregator->lag_ports;
1319 port->aggregator->num_of_ports++;
1320 aggregator->lag_ports = port;
1321 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1322 port->actor_port_number,
1323 port->aggregator->aggregator_identifier);
1325 /* mark this port as selected */
1326 port->sm_vars |= AD_PORT_SELECTED;
1332 /* the port couldn't find an aggregator - attach it to a new
1336 if (free_aggregator) {
1337 /* assign port a new aggregator */
1338 port->aggregator = free_aggregator;
1339 port->actor_port_aggregator_identifier =
1340 port->aggregator->aggregator_identifier;
1342 /* update the new aggregator's parameters
1343 * if port was responsed from the end-user
1345 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1346 /* if port is full duplex */
1347 port->aggregator->is_individual = false;
1349 port->aggregator->is_individual = true;
1351 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1352 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1353 port->aggregator->partner_system =
1354 port->partner_oper.system;
1355 port->aggregator->partner_system_priority =
1356 port->partner_oper.system_priority;
1357 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1358 port->aggregator->receive_state = 1;
1359 port->aggregator->transmit_state = 1;
1360 port->aggregator->lag_ports = port;
1361 port->aggregator->num_of_ports++;
1363 /* mark this port as selected */
1364 port->sm_vars |= AD_PORT_SELECTED;
1366 pr_debug("Port %d joined LAG %d(new LAG)\n",
1367 port->actor_port_number,
1368 port->aggregator->aggregator_identifier);
1370 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
1371 port->slave->bond->dev->name,
1372 port->actor_port_number, port->slave->dev->name);
1375 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1376 * in all aggregator's ports, else set ready=FALSE in all
1377 * aggregator's ports
1379 __set_agg_ports_ready(port->aggregator,
1380 __agg_ports_are_ready(port->aggregator));
1382 aggregator = __get_first_agg(port);
1383 ad_agg_selection_logic(aggregator);
1386 /* Decide if "agg" is a better choice for the new active aggregator that
1387 * the current best, according to the ad_select policy.
1389 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1390 struct aggregator *curr)
1392 /* 0. If no best, select current.
1394 * 1. If the current agg is not individual, and the best is
1395 * individual, select current.
1397 * 2. If current agg is individual and the best is not, keep best.
1399 * 3. Therefore, current and best are both individual or both not
1402 * 3a. If current agg partner replied, and best agg partner did not,
1405 * 3b. If current agg partner did not reply and best agg partner
1406 * did reply, keep best.
1408 * 4. Therefore, current and best both have partner replies or
1409 * both do not, so perform selection policy:
1411 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1412 * select by bandwidth.
1414 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1419 if (!curr->is_individual && best->is_individual)
1422 if (curr->is_individual && !best->is_individual)
1425 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1428 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1431 switch (__get_agg_selection_mode(curr->lag_ports)) {
1433 if (curr->num_of_ports > best->num_of_ports)
1436 if (curr->num_of_ports < best->num_of_ports)
1440 case BOND_AD_STABLE:
1441 case BOND_AD_BANDWIDTH:
1442 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1448 pr_warn_ratelimited("%s: Impossible agg select mode %d\n",
1449 curr->slave->bond->dev->name,
1450 __get_agg_selection_mode(curr->lag_ports));
1457 static int agg_device_up(const struct aggregator *agg)
1459 struct port *port = agg->lag_ports;
1464 return netif_running(port->slave->dev) &&
1465 netif_carrier_ok(port->slave->dev);
1469 * ad_agg_selection_logic - select an aggregation group for a team
1470 * @aggregator: the aggregator we're looking at
1472 * It is assumed that only one aggregator may be selected for a team.
1474 * The logic of this function is to select the aggregator according to
1475 * the ad_select policy:
1477 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1478 * it, and to reselect the active aggregator only if the previous
1479 * aggregator has no more ports related to it.
1481 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1482 * bandwidth, and reselect whenever a link state change takes place or the
1483 * set of slaves in the bond changes.
1485 * BOND_AD_COUNT: select the aggregator with largest number of ports
1486 * (slaves), and reselect whenever a link state change takes place or the
1487 * set of slaves in the bond changes.
1489 * FIXME: this function MUST be called with the first agg in the bond, or
1490 * __get_active_agg() won't work correctly. This function should be better
1491 * called with the bond itself, and retrieve the first agg from it.
1493 static void ad_agg_selection_logic(struct aggregator *agg)
1495 struct aggregator *best, *active, *origin;
1496 struct bonding *bond = agg->slave->bond;
1497 struct list_head *iter;
1498 struct slave *slave;
1503 active = __get_active_agg(agg);
1504 best = (active && agg_device_up(active)) ? active : NULL;
1506 bond_for_each_slave_rcu(bond, slave, iter) {
1507 agg = &(SLAVE_AD_INFO(slave).aggregator);
1511 if (agg->num_of_ports && agg_device_up(agg))
1512 best = ad_agg_selection_test(best, agg);
1516 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1517 /* For the STABLE policy, don't replace the old active
1518 * aggregator if it's still active (it has an answering
1519 * partner) or if both the best and active don't have an
1520 * answering partner.
1522 if (active && active->lag_ports &&
1523 active->lag_ports->is_enabled &&
1524 (__agg_has_partner(active) ||
1525 (!__agg_has_partner(active) &&
1526 !__agg_has_partner(best)))) {
1527 if (!(!active->actor_oper_aggregator_key &&
1528 best->actor_oper_aggregator_key)) {
1530 active->is_active = 1;
1535 if (best && (best == active)) {
1537 active->is_active = 1;
1540 /* if there is new best aggregator, activate it */
1542 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1543 best->aggregator_identifier, best->num_of_ports,
1544 best->actor_oper_aggregator_key,
1545 best->partner_oper_aggregator_key,
1546 best->is_individual, best->is_active);
1547 pr_debug("best ports %p slave %p %s\n",
1548 best->lag_ports, best->slave,
1549 best->slave ? best->slave->dev->name : "NULL");
1551 bond_for_each_slave_rcu(bond, slave, iter) {
1552 agg = &(SLAVE_AD_INFO(slave).aggregator);
1554 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1555 agg->aggregator_identifier, agg->num_of_ports,
1556 agg->actor_oper_aggregator_key,
1557 agg->partner_oper_aggregator_key,
1558 agg->is_individual, agg->is_active);
1561 /* check if any partner replys */
1562 if (best->is_individual) {
1563 pr_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1565 best->slave->bond->dev->name : "NULL");
1568 best->is_active = 1;
1569 pr_debug("LAG %d chosen as the active LAG\n",
1570 best->aggregator_identifier);
1571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1572 best->aggregator_identifier, best->num_of_ports,
1573 best->actor_oper_aggregator_key,
1574 best->partner_oper_aggregator_key,
1575 best->is_individual, best->is_active);
1577 /* disable the ports that were related to the former
1581 for (port = active->lag_ports; port;
1582 port = port->next_port_in_aggregator) {
1583 __disable_port(port);
1588 /* if the selected aggregator is of join individuals
1589 * (partner_system is NULL), enable their ports
1591 active = __get_active_agg(origin);
1594 if (!__agg_has_partner(active)) {
1595 for (port = active->lag_ports; port;
1596 port = port->next_port_in_aggregator) {
1597 __enable_port(port);
1604 bond_3ad_set_carrier(bond);
1608 * ad_clear_agg - clear a given aggregator's parameters
1609 * @aggregator: the aggregator we're looking at
1611 static void ad_clear_agg(struct aggregator *aggregator)
1614 aggregator->is_individual = false;
1615 aggregator->actor_admin_aggregator_key = 0;
1616 aggregator->actor_oper_aggregator_key = 0;
1617 aggregator->partner_system = null_mac_addr;
1618 aggregator->partner_system_priority = 0;
1619 aggregator->partner_oper_aggregator_key = 0;
1620 aggregator->receive_state = 0;
1621 aggregator->transmit_state = 0;
1622 aggregator->lag_ports = NULL;
1623 aggregator->is_active = 0;
1624 aggregator->num_of_ports = 0;
1625 pr_debug("LAG %d was cleared\n",
1626 aggregator->aggregator_identifier);
1631 * ad_initialize_agg - initialize a given aggregator's parameters
1632 * @aggregator: the aggregator we're looking at
1634 static void ad_initialize_agg(struct aggregator *aggregator)
1637 ad_clear_agg(aggregator);
1639 aggregator->aggregator_mac_address = null_mac_addr;
1640 aggregator->aggregator_identifier = 0;
1641 aggregator->slave = NULL;
1646 * ad_initialize_port - initialize a given port's parameters
1647 * @aggregator: the aggregator we're looking at
1648 * @lacp_fast: boolean. whether fast periodic should be used
1650 static void ad_initialize_port(struct port *port, int lacp_fast)
1652 static const struct port_params tmpl = {
1653 .system_priority = 0xffff,
1656 .port_priority = 0xff,
1659 static const struct lacpdu lacpdu = {
1661 .version_number = 0x01,
1662 .tlv_type_actor_info = 0x01,
1663 .actor_information_length = 0x14,
1664 .tlv_type_partner_info = 0x02,
1665 .partner_information_length = 0x14,
1666 .tlv_type_collector_info = 0x03,
1667 .collector_information_length = 0x10,
1668 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1672 port->actor_port_number = 1;
1673 port->actor_port_priority = 0xff;
1674 port->actor_system = null_mac_addr;
1675 port->actor_system_priority = 0xffff;
1676 port->actor_port_aggregator_identifier = 0;
1678 port->actor_admin_port_key = 1;
1679 port->actor_oper_port_key = 1;
1680 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1681 AD_STATE_LACP_ACTIVITY;
1682 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1683 AD_STATE_LACP_ACTIVITY;
1686 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1688 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1689 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1691 port->is_enabled = true;
1692 /* private parameters */
1693 port->sm_vars = 0x3;
1694 port->sm_rx_state = 0;
1695 port->sm_rx_timer_counter = 0;
1696 port->sm_periodic_state = 0;
1697 port->sm_periodic_timer_counter = 0;
1698 port->sm_mux_state = 0;
1699 port->sm_mux_timer_counter = 0;
1700 port->sm_tx_state = 0;
1701 port->sm_tx_timer_counter = 0;
1703 port->aggregator = NULL;
1704 port->next_port_in_aggregator = NULL;
1705 port->transaction_id = 0;
1707 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1712 * ad_enable_collecting_distributing - enable a port's transmit/receive
1713 * @port: the port we're looking at
1715 * Enable @port if it's in an active aggregator
1717 static void ad_enable_collecting_distributing(struct port *port)
1719 if (port->aggregator->is_active) {
1720 pr_debug("Enabling port %d(LAG %d)\n",
1721 port->actor_port_number,
1722 port->aggregator->aggregator_identifier);
1723 __enable_port(port);
1728 * ad_disable_collecting_distributing - disable a port's transmit/receive
1729 * @port: the port we're looking at
1731 static void ad_disable_collecting_distributing(struct port *port)
1733 if (port->aggregator &&
1734 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1735 &(null_mac_addr))) {
1736 pr_debug("Disabling port %d(LAG %d)\n",
1737 port->actor_port_number,
1738 port->aggregator->aggregator_identifier);
1739 __disable_port(port);
1744 * ad_marker_info_received - handle receive of a Marker information frame
1745 * @marker_info: Marker info received
1746 * @port: the port we're looking at
1748 static void ad_marker_info_received(struct bond_marker *marker_info,
1751 struct bond_marker marker;
1753 /* copy the received marker data to the response marker */
1754 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1755 /* change the marker subtype to marker response */
1756 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1758 /* send the marker response */
1759 if (ad_marker_send(port, &marker) >= 0) {
1760 pr_debug("Sent Marker Response on port %d\n",
1761 port->actor_port_number);
1766 * ad_marker_response_received - handle receive of a marker response frame
1767 * @marker: marker PDU received
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_response_received(struct bond_marker *marker,
1779 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1782 /* ========= AD exported functions to the main bonding code ========= */
1784 /* Check aggregators status in team every T seconds */
1785 #define AD_AGGREGATOR_SELECTION_TIMER 8
1788 * bond_3ad_initiate_agg_selection - initate aggregator selection
1789 * @bond: bonding struct
1791 * Set the aggregation selection timer, to initiate an agg selection in
1792 * the very near future. Called during first initialization, and during
1793 * any down to up transitions of the bond.
1795 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1797 BOND_AD_INFO(bond).agg_select_timer = timeout;
1801 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1802 * @bond: bonding struct to work on
1803 * @tick_resolution: tick duration (millisecond resolution)
1805 * Can be called only after the mac address of the bond is set.
1807 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1809 /* check that the bond is not initialized yet */
1810 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1811 bond->dev->dev_addr)) {
1813 BOND_AD_INFO(bond).aggregator_identifier = 0;
1815 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1816 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1818 /* initialize how many times this module is called in one
1819 * second (should be about every 100ms)
1821 ad_ticks_per_sec = tick_resolution;
1823 bond_3ad_initiate_agg_selection(bond,
1824 AD_AGGREGATOR_SELECTION_TIMER *
1830 * bond_3ad_bind_slave - initialize a slave's port
1831 * @slave: slave struct to work on
1833 * Returns: 0 on success
1836 void bond_3ad_bind_slave(struct slave *slave)
1838 struct bonding *bond = bond_get_bond_by_slave(slave);
1840 struct aggregator *aggregator;
1842 /* check that the slave has not been initialized yet. */
1843 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1845 /* port initialization */
1846 port = &(SLAVE_AD_INFO(slave).port);
1848 ad_initialize_port(port, bond->params.lacp_fast);
1850 __initialize_port_locks(slave);
1851 port->slave = slave;
1852 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1853 /* key is determined according to the link speed, duplex and user key(which
1854 * is yet not supported)
1856 port->actor_admin_port_key = 0;
1857 port->actor_admin_port_key |= __get_duplex(port);
1858 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1859 port->actor_oper_port_key = port->actor_admin_port_key;
1860 /* if the port is not full duplex, then the port should be not
1863 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1864 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1865 /* actor system is the bond's system */
1866 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1867 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1868 * lacpdu's are sent in one second)
1870 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1871 port->aggregator = NULL;
1872 port->next_port_in_aggregator = NULL;
1874 __disable_port(port);
1876 /* aggregator initialization */
1877 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1879 ad_initialize_agg(aggregator);
1881 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1882 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1883 aggregator->slave = slave;
1884 aggregator->is_active = 0;
1885 aggregator->num_of_ports = 0;
1890 * bond_3ad_unbind_slave - deinitialize a slave's port
1891 * @slave: slave struct to work on
1893 * Search for the aggregator that is related to this port, remove the
1894 * aggregator and assign another aggregator for other port related to it
1895 * (if any), and remove the port.
1897 void bond_3ad_unbind_slave(struct slave *slave)
1899 struct port *port, *prev_port, *temp_port;
1900 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1901 int select_new_active_agg = 0;
1902 struct bonding *bond = slave->bond;
1903 struct slave *slave_iter;
1904 struct list_head *iter;
1906 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1907 port = &(SLAVE_AD_INFO(slave).port);
1909 /* if slave is null, the whole port is not initialized */
1911 pr_warn("Warning: %s: Trying to unbind an uninitialized port on %s\n",
1912 slave->bond->dev->name, slave->dev->name);
1916 pr_debug("Unbinding Link Aggregation Group %d\n",
1917 aggregator->aggregator_identifier);
1919 /* Tell the partner that this port is not suitable for aggregation */
1920 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1921 __update_lacpdu_from_port(port);
1922 ad_lacpdu_send(port);
1924 /* check if this aggregator is occupied */
1925 if (aggregator->lag_ports) {
1926 /* check if there are other ports related to this aggregator
1927 * except the port related to this slave(thats ensure us that
1928 * there is a reason to search for new aggregator, and that we
1931 if ((aggregator->lag_ports != port) ||
1932 (aggregator->lag_ports->next_port_in_aggregator)) {
1933 /* find new aggregator for the related port(s) */
1934 bond_for_each_slave(bond, slave_iter, iter) {
1935 new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
1936 /* if the new aggregator is empty, or it is
1937 * connected to our port only
1939 if (!new_aggregator->lag_ports ||
1940 ((new_aggregator->lag_ports == port) &&
1941 !new_aggregator->lag_ports->next_port_in_aggregator))
1945 new_aggregator = NULL;
1947 /* if new aggregator found, copy the aggregator's
1948 * parameters and connect the related lag_ports to the
1951 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
1952 pr_debug("Some port(s) related to LAG %d - replacing with LAG %d\n",
1953 aggregator->aggregator_identifier,
1954 new_aggregator->aggregator_identifier);
1956 if ((new_aggregator->lag_ports == port) &&
1957 new_aggregator->is_active) {
1958 pr_info("%s: Removing an active aggregator\n",
1959 aggregator->slave->bond->dev->name);
1960 select_new_active_agg = 1;
1963 new_aggregator->is_individual = aggregator->is_individual;
1964 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
1965 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
1966 new_aggregator->partner_system = aggregator->partner_system;
1967 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
1968 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
1969 new_aggregator->receive_state = aggregator->receive_state;
1970 new_aggregator->transmit_state = aggregator->transmit_state;
1971 new_aggregator->lag_ports = aggregator->lag_ports;
1972 new_aggregator->is_active = aggregator->is_active;
1973 new_aggregator->num_of_ports = aggregator->num_of_ports;
1975 /* update the information that is written on
1976 * the ports about the aggregator
1978 for (temp_port = aggregator->lag_ports; temp_port;
1979 temp_port = temp_port->next_port_in_aggregator) {
1980 temp_port->aggregator = new_aggregator;
1981 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
1984 ad_clear_agg(aggregator);
1986 if (select_new_active_agg)
1987 ad_agg_selection_logic(__get_first_agg(port));
1989 pr_warn("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
1990 slave->bond->dev->name);
1993 /* in case that the only port related to this
1994 * aggregator is the one we want to remove
1996 select_new_active_agg = aggregator->is_active;
1997 ad_clear_agg(aggregator);
1998 if (select_new_active_agg) {
1999 pr_info("%s: Removing an active aggregator\n",
2000 slave->bond->dev->name);
2001 /* select new active aggregator */
2002 temp_aggregator = __get_first_agg(port);
2003 if (temp_aggregator)
2004 ad_agg_selection_logic(temp_aggregator);
2009 pr_debug("Unbinding port %d\n", port->actor_port_number);
2011 /* find the aggregator that this port is connected to */
2012 bond_for_each_slave(bond, slave_iter, iter) {
2013 temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
2015 /* search the port in the aggregator's related ports */
2016 for (temp_port = temp_aggregator->lag_ports; temp_port;
2017 prev_port = temp_port,
2018 temp_port = temp_port->next_port_in_aggregator) {
2019 if (temp_port == port) {
2020 /* the aggregator found - detach the port from
2024 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2026 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2027 temp_aggregator->num_of_ports--;
2028 if (temp_aggregator->num_of_ports == 0) {
2029 select_new_active_agg = temp_aggregator->is_active;
2030 ad_clear_agg(temp_aggregator);
2031 if (select_new_active_agg) {
2032 pr_info("%s: Removing an active aggregator\n",
2033 slave->bond->dev->name);
2034 /* select new active aggregator */
2035 ad_agg_selection_logic(__get_first_agg(port));
2046 * bond_3ad_state_machine_handler - handle state machines timeout
2047 * @bond: bonding struct to work on
2049 * The state machine handling concept in this module is to check every tick
2050 * which state machine should operate any function. The execution order is
2051 * round robin, so when we have an interaction between state machines, the
2052 * reply of one to each other might be delayed until next tick.
2054 * This function also complete the initialization when the agg_select_timer
2055 * times out, and it selects an aggregator for the ports that are yet not
2056 * related to any aggregator, and selects the active aggregator for a bond.
2058 void bond_3ad_state_machine_handler(struct work_struct *work)
2060 struct bonding *bond = container_of(work, struct bonding,
2062 struct aggregator *aggregator;
2063 struct list_head *iter;
2064 struct slave *slave;
2066 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2068 read_lock(&bond->lock);
2071 /* check if there are any slaves */
2072 if (!bond_has_slaves(bond))
2075 /* check if agg_select_timer timer after initialize is timed out */
2076 if (BOND_AD_INFO(bond).agg_select_timer &&
2077 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2078 slave = bond_first_slave_rcu(bond);
2079 port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL;
2081 /* select the active aggregator for the bond */
2084 pr_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2089 aggregator = __get_first_agg(port);
2090 ad_agg_selection_logic(aggregator);
2092 bond_3ad_set_carrier(bond);
2095 /* for each port run the state machines */
2096 bond_for_each_slave_rcu(bond, slave, iter) {
2097 port = &(SLAVE_AD_INFO(slave).port);
2099 pr_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2104 /* Lock around state machines to protect data accessed
2105 * by all (e.g., port->sm_vars). ad_rx_machine may run
2106 * concurrently due to incoming LACPDU.
2108 __get_state_machine_lock(port);
2110 ad_rx_machine(NULL, port);
2111 ad_periodic_machine(port);
2112 ad_port_selection_logic(port);
2113 ad_mux_machine(port);
2114 ad_tx_machine(port);
2116 /* turn off the BEGIN bit, since we already handled it */
2117 if (port->sm_vars & AD_PORT_BEGIN)
2118 port->sm_vars &= ~AD_PORT_BEGIN;
2120 __release_state_machine_lock(port);
2124 bond_for_each_slave_rcu(bond, slave, iter) {
2125 if (slave->should_notify) {
2126 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2131 read_unlock(&bond->lock);
2133 if (should_notify_rtnl && rtnl_trylock()) {
2134 bond_slave_state_notify(bond);
2137 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2141 * bond_3ad_rx_indication - handle a received frame
2142 * @lacpdu: received lacpdu
2143 * @slave: slave struct to work on
2144 * @length: length of the data received
2146 * It is assumed that frames that were sent on this NIC don't returned as new
2147 * received frames (loopback). Since only the payload is given to this
2148 * function, it check for loopback.
2150 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2154 int ret = RX_HANDLER_ANOTHER;
2156 if (length >= sizeof(struct lacpdu)) {
2158 port = &(SLAVE_AD_INFO(slave).port);
2161 pr_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2162 slave->dev->name, slave->bond->dev->name);
2166 switch (lacpdu->subtype) {
2167 case AD_TYPE_LACPDU:
2168 ret = RX_HANDLER_CONSUMED;
2169 pr_debug("Received LACPDU on port %d\n",
2170 port->actor_port_number);
2171 /* Protect against concurrent state machines */
2172 __get_state_machine_lock(port);
2173 ad_rx_machine(lacpdu, port);
2174 __release_state_machine_lock(port);
2177 case AD_TYPE_MARKER:
2178 ret = RX_HANDLER_CONSUMED;
2179 /* No need to convert fields to Little Endian since we
2180 * don't use the marker's fields.
2183 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2184 case AD_MARKER_INFORMATION_SUBTYPE:
2185 pr_debug("Received Marker Information on port %d\n",
2186 port->actor_port_number);
2187 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2190 case AD_MARKER_RESPONSE_SUBTYPE:
2191 pr_debug("Received Marker Response on port %d\n",
2192 port->actor_port_number);
2193 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2197 pr_debug("Received an unknown Marker subtype on slot %d\n",
2198 port->actor_port_number);
2206 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2207 * @slave: slave struct to work on
2209 * Handle reselection of aggregator (if needed) for this port.
2211 void bond_3ad_adapter_speed_changed(struct slave *slave)
2215 port = &(SLAVE_AD_INFO(slave).port);
2217 /* if slave is null, the whole port is not initialized */
2219 pr_warn("Warning: %s: speed changed for uninitialized port on %s\n",
2220 slave->bond->dev->name, slave->dev->name);
2224 __get_state_machine_lock(port);
2226 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2227 port->actor_oper_port_key = port->actor_admin_port_key |=
2228 (__get_link_speed(port) << 1);
2229 pr_debug("Port %d changed speed\n", port->actor_port_number);
2230 /* there is no need to reselect a new aggregator, just signal the
2231 * state machines to reinitialize
2233 port->sm_vars |= AD_PORT_BEGIN;
2235 __release_state_machine_lock(port);
2239 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2240 * @slave: slave struct to work on
2242 * Handle reselection of aggregator (if needed) for this port.
2244 void bond_3ad_adapter_duplex_changed(struct slave *slave)
2248 port = &(SLAVE_AD_INFO(slave).port);
2250 /* if slave is null, the whole port is not initialized */
2252 pr_warn("%s: Warning: duplex changed for uninitialized port on %s\n",
2253 slave->bond->dev->name, slave->dev->name);
2257 __get_state_machine_lock(port);
2259 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2260 port->actor_oper_port_key = port->actor_admin_port_key |=
2262 pr_debug("Port %d changed duplex\n", port->actor_port_number);
2263 /* there is no need to reselect a new aggregator, just signal the
2264 * state machines to reinitialize
2266 port->sm_vars |= AD_PORT_BEGIN;
2268 __release_state_machine_lock(port);
2272 * bond_3ad_handle_link_change - handle a slave's link status change indication
2273 * @slave: slave struct to work on
2274 * @status: whether the link is now up or down
2276 * Handle reselection of aggregator (if needed) for this port.
2278 void bond_3ad_handle_link_change(struct slave *slave, char link)
2282 port = &(SLAVE_AD_INFO(slave).port);
2284 /* if slave is null, the whole port is not initialized */
2286 pr_warn("Warning: %s: link status changed for uninitialized port on %s\n",
2287 slave->bond->dev->name, slave->dev->name);
2291 __get_state_machine_lock(port);
2292 /* on link down we are zeroing duplex and speed since
2293 * some of the adaptors(ce1000.lan) report full duplex/speed
2294 * instead of N/A(duplex) / 0(speed).
2296 * on link up we are forcing recheck on the duplex and speed since
2297 * some of he adaptors(ce1000.lan) report.
2299 if (link == BOND_LINK_UP) {
2300 port->is_enabled = true;
2301 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2302 port->actor_oper_port_key = port->actor_admin_port_key |=
2304 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2305 port->actor_oper_port_key = port->actor_admin_port_key |=
2306 (__get_link_speed(port) << 1);
2308 /* link has failed */
2309 port->is_enabled = false;
2310 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2311 port->actor_oper_port_key = (port->actor_admin_port_key &=
2312 ~AD_SPEED_KEY_BITS);
2314 pr_debug("Port %d changed link status to %s\n",
2315 port->actor_port_number,
2316 link == BOND_LINK_UP ? "UP" : "DOWN");
2317 /* there is no need to reselect a new aggregator, just signal the
2318 * state machines to reinitialize
2320 port->sm_vars |= AD_PORT_BEGIN;
2322 __release_state_machine_lock(port);
2326 * bond_3ad_set_carrier - set link state for bonding master
2327 * @bond - bonding structure
2329 * if we have an active aggregator, we're up, if not, we're down.
2330 * Presumes that we cannot have an active aggregator if there are
2331 * no slaves with link up.
2333 * This behavior complies with IEEE 802.3 section 43.3.9.
2335 * Called by bond_set_carrier(). Return zero if carrier state does not
2336 * change, nonzero if it does.
2338 int bond_3ad_set_carrier(struct bonding *bond)
2340 struct aggregator *active;
2341 struct slave *first_slave;
2345 first_slave = bond_first_slave_rcu(bond);
2350 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator));
2352 /* are enough slaves available to consider link up? */
2353 if (active->num_of_ports < bond->params.min_links) {
2354 if (netif_carrier_ok(bond->dev)) {
2355 netif_carrier_off(bond->dev);
2358 } else if (!netif_carrier_ok(bond->dev)) {
2359 netif_carrier_on(bond->dev);
2362 } else if (netif_carrier_ok(bond->dev)) {
2363 netif_carrier_off(bond->dev);
2371 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2372 * @bond: bonding struct to work on
2373 * @ad_info: ad_info struct to fill with the bond's info
2375 * Returns: 0 on success
2378 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2379 struct ad_info *ad_info)
2381 struct aggregator *aggregator = NULL;
2382 struct list_head *iter;
2383 struct slave *slave;
2386 bond_for_each_slave_rcu(bond, slave, iter) {
2387 port = &(SLAVE_AD_INFO(slave).port);
2388 if (port->aggregator && port->aggregator->is_active) {
2389 aggregator = port->aggregator;
2397 ad_info->aggregator_id = aggregator->aggregator_identifier;
2398 ad_info->ports = aggregator->num_of_ports;
2399 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2400 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2401 ether_addr_copy(ad_info->partner_system,
2402 aggregator->partner_system.mac_addr_value);
2406 /* Wrapper used to hold bond->lock so no slave manipulation can occur */
2407 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2412 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2418 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2420 struct bonding *bond = netdev_priv(dev);
2421 struct slave *slave, *first_ok_slave;
2422 struct aggregator *agg;
2423 struct ad_info ad_info;
2424 struct list_head *iter;
2429 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
2430 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
2435 slaves_in_agg = ad_info.ports;
2436 agg_id = ad_info.aggregator_id;
2438 if (slaves_in_agg == 0) {
2439 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
2443 slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg);
2444 first_ok_slave = NULL;
2446 bond_for_each_slave_rcu(bond, slave, iter) {
2447 agg = SLAVE_AD_INFO(slave).port.aggregator;
2448 if (!agg || agg->aggregator_identifier != agg_id)
2451 if (slave_agg_no >= 0) {
2452 if (!first_ok_slave && SLAVE_IS_OK(slave))
2453 first_ok_slave = slave;
2458 if (SLAVE_IS_OK(slave)) {
2459 bond_dev_queue_xmit(bond, skb, slave->dev);
2464 if (slave_agg_no >= 0) {
2465 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2470 /* we couldn't find any suitable slave after the agg_no, so use the
2471 * first suitable found, if found.
2474 bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
2479 return NETDEV_TX_OK;
2481 /* no suitable interface, frame not sent */
2482 dev_kfree_skb_any(skb);
2486 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2487 struct slave *slave)
2489 int ret = RX_HANDLER_ANOTHER;
2490 struct lacpdu *lacpdu, _lacpdu;
2492 if (skb->protocol != PKT_TYPE_LACPDU)
2495 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2499 read_lock(&bond->lock);
2500 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len);
2501 read_unlock(&bond->lock);
2506 * bond_3ad_update_lacp_rate - change the lacp rate
2507 * @bond - bonding struct
2509 * When modify lacp_rate parameter via sysfs,
2510 * update actor_oper_port_state of each port.
2512 * Hold slave->state_machine_lock,
2513 * so we can modify port->actor_oper_port_state,
2514 * no matter bond is up or down.
2516 void bond_3ad_update_lacp_rate(struct bonding *bond)
2518 struct port *port = NULL;
2519 struct list_head *iter;
2520 struct slave *slave;
2523 lacp_fast = bond->params.lacp_fast;
2524 bond_for_each_slave(bond, slave, iter) {
2525 port = &(SLAVE_AD_INFO(slave).port);
2526 __get_state_machine_lock(port);
2528 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2530 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2531 __release_state_machine_lock(port);