2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
23 #include <linux/skbuff.h>
24 #include <linux/if_ether.h>
25 #include <linux/netdevice.h>
26 #include <linux/spinlock.h>
27 #include <linux/ethtool.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_bonding.h>
30 #include <linux/pkt_sched.h>
31 #include <net/net_namespace.h>
32 #include <net/bonding.h>
33 #include <net/bond_3ad.h>
35 /* General definitions */
36 #define AD_SHORT_TIMEOUT 1
37 #define AD_LONG_TIMEOUT 0
38 #define AD_STANDBY 0x2
39 #define AD_MAX_TX_IN_SECOND 3
40 #define AD_COLLECTOR_MAX_DELAY 0
42 /* Timer definitions (43.4.4 in the 802.3ad standard) */
43 #define AD_FAST_PERIODIC_TIME 1
44 #define AD_SLOW_PERIODIC_TIME 30
45 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
46 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
47 #define AD_CHURN_DETECTION_TIME 60
48 #define AD_AGGREGATE_WAIT_TIME 2
50 /* Port state definitions (43.4.2.2 in the 802.3ad standard) */
51 #define AD_STATE_LACP_ACTIVITY 0x1
52 #define AD_STATE_LACP_TIMEOUT 0x2
53 #define AD_STATE_AGGREGATION 0x4
54 #define AD_STATE_SYNCHRONIZATION 0x8
55 #define AD_STATE_COLLECTING 0x10
56 #define AD_STATE_DISTRIBUTING 0x20
57 #define AD_STATE_DEFAULTED 0x40
58 #define AD_STATE_EXPIRED 0x80
60 /* Port Variables definitions used by the State Machines (43.4.7 in the
63 #define AD_PORT_BEGIN 0x1
64 #define AD_PORT_LACP_ENABLED 0x2
65 #define AD_PORT_ACTOR_CHURN 0x4
66 #define AD_PORT_PARTNER_CHURN 0x8
67 #define AD_PORT_READY 0x10
68 #define AD_PORT_READY_N 0x20
69 #define AD_PORT_MATCHED 0x40
70 #define AD_PORT_STANDBY 0x80
71 #define AD_PORT_SELECTED 0x100
72 #define AD_PORT_MOVED 0x200
73 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
75 /* Port Key definitions
76 * key is determined according to the link speed, duplex and
77 * user key (which is yet not supported)
78 * --------------------------------------------------------------
79 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
80 * --------------------------------------------------------------
83 #define AD_DUPLEX_KEY_MASKS 0x1
84 #define AD_SPEED_KEY_MASKS 0x3E
85 #define AD_USER_KEY_MASKS 0xFFC0
87 enum ad_link_speed_type {
88 AD_LINK_SPEED_1MBPS = 1,
90 AD_LINK_SPEED_100MBPS,
91 AD_LINK_SPEED_1000MBPS,
92 AD_LINK_SPEED_2500MBPS,
93 AD_LINK_SPEED_5000MBPS,
94 AD_LINK_SPEED_10000MBPS,
95 AD_LINK_SPEED_14000MBPS,
96 AD_LINK_SPEED_20000MBPS,
97 AD_LINK_SPEED_25000MBPS,
98 AD_LINK_SPEED_40000MBPS,
99 AD_LINK_SPEED_50000MBPS,
100 AD_LINK_SPEED_56000MBPS,
101 AD_LINK_SPEED_100000MBPS,
104 /* compare MAC addresses */
105 #define MAC_ADDRESS_EQUAL(A, B) \
106 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
108 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
111 static u16 ad_ticks_per_sec;
112 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
114 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
115 MULTICAST_LACPDU_ADDR;
117 /* ================= main 802.3ad protocol functions ================== */
118 static int ad_lacpdu_send(struct port *port);
119 static int ad_marker_send(struct port *port, struct bond_marker *marker);
120 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
121 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
122 static void ad_tx_machine(struct port *port);
123 static void ad_periodic_machine(struct port *port);
124 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
125 static void ad_agg_selection_logic(struct aggregator *aggregator,
126 bool *update_slave_arr);
127 static void ad_clear_agg(struct aggregator *aggregator);
128 static void ad_initialize_agg(struct aggregator *aggregator);
129 static void ad_initialize_port(struct port *port, int lacp_fast);
130 static void ad_enable_collecting_distributing(struct port *port,
131 bool *update_slave_arr);
132 static void ad_disable_collecting_distributing(struct port *port,
133 bool *update_slave_arr);
134 static void ad_marker_info_received(struct bond_marker *marker_info,
136 static void ad_marker_response_received(struct bond_marker *marker,
138 static void ad_update_actor_keys(struct port *port, bool reset);
141 /* ================= api to bonding and kernel code ================== */
144 * __get_bond_by_port - get the port's bonding struct
145 * @port: the port we're looking at
147 * Return @port's bonding struct, or %NULL if it can't be found.
149 static inline struct bonding *__get_bond_by_port(struct port *port)
151 if (port->slave == NULL)
154 return bond_get_bond_by_slave(port->slave);
158 * __get_first_agg - get the first aggregator in the bond
159 * @bond: the bond we're looking at
161 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
163 * The caller must hold RCU or RTNL lock.
165 static inline struct aggregator *__get_first_agg(struct port *port)
167 struct bonding *bond = __get_bond_by_port(port);
168 struct slave *first_slave;
169 struct aggregator *agg;
171 /* If there's no bond for this port, or bond has no slaves */
176 first_slave = bond_first_slave_rcu(bond);
177 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
184 * __agg_has_partner - see if we have a partner
185 * @agg: the agregator we're looking at
187 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
188 * address for the partner). Return 0 if not.
190 static inline int __agg_has_partner(struct aggregator *agg)
192 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
196 * __disable_port - disable the port's slave
197 * @port: the port we're looking at
199 static inline void __disable_port(struct port *port)
201 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
205 * __enable_port - enable the port's slave, if it's up
206 * @port: the port we're looking at
208 static inline void __enable_port(struct port *port)
210 struct slave *slave = port->slave;
212 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
213 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
217 * __port_is_enabled - check if the port's slave is in active state
218 * @port: the port we're looking at
220 static inline int __port_is_enabled(struct port *port)
222 return bond_is_active_slave(port->slave);
226 * __get_agg_selection_mode - get the aggregator selection mode
227 * @port: the port we're looking at
229 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
231 static inline u32 __get_agg_selection_mode(struct port *port)
233 struct bonding *bond = __get_bond_by_port(port);
236 return BOND_AD_STABLE;
238 return bond->params.ad_select;
242 * __check_agg_selection_timer - check if the selection timer has expired
243 * @port: the port we're looking at
245 static inline int __check_agg_selection_timer(struct port *port)
247 struct bonding *bond = __get_bond_by_port(port);
252 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
256 * __get_link_speed - get a port's speed
257 * @port: the port we're looking at
259 * Return @port's speed in 802.3ad enum format. i.e. one of:
261 * %AD_LINK_SPEED_10MBPS,
262 * %AD_LINK_SPEED_100MBPS,
263 * %AD_LINK_SPEED_1000MBPS,
264 * %AD_LINK_SPEED_2500MBPS,
265 * %AD_LINK_SPEED_5000MBPS,
266 * %AD_LINK_SPEED_10000MBPS
267 * %AD_LINK_SPEED_14000MBPS,
268 * %AD_LINK_SPEED_20000MBPS
269 * %AD_LINK_SPEED_25000MBPS
270 * %AD_LINK_SPEED_40000MBPS
271 * %AD_LINK_SPEED_50000MBPS
272 * %AD_LINK_SPEED_56000MBPS
273 * %AD_LINK_SPEED_100000MBPS
275 static u16 __get_link_speed(struct port *port)
277 struct slave *slave = port->slave;
280 /* this if covers only a special case: when the configuration starts
281 * with link down, it sets the speed to 0.
282 * This is done in spite of the fact that the e100 driver reports 0
283 * to be compatible with MVT in the future.
285 if (slave->link != BOND_LINK_UP)
288 switch (slave->speed) {
290 speed = AD_LINK_SPEED_10MBPS;
294 speed = AD_LINK_SPEED_100MBPS;
298 speed = AD_LINK_SPEED_1000MBPS;
302 speed = AD_LINK_SPEED_2500MBPS;
306 speed = AD_LINK_SPEED_5000MBPS;
310 speed = AD_LINK_SPEED_10000MBPS;
314 speed = AD_LINK_SPEED_14000MBPS;
318 speed = AD_LINK_SPEED_20000MBPS;
322 speed = AD_LINK_SPEED_25000MBPS;
326 speed = AD_LINK_SPEED_40000MBPS;
330 speed = AD_LINK_SPEED_50000MBPS;
334 speed = AD_LINK_SPEED_56000MBPS;
338 speed = AD_LINK_SPEED_100000MBPS;
342 /* unknown speed value from ethtool. shouldn't happen */
348 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
349 port->actor_port_number, speed);
354 * __get_duplex - get a port's duplex
355 * @port: the port we're looking at
357 * Return @port's duplex in 802.3ad bitmask format. i.e.:
358 * 0x01 if in full duplex
361 static u8 __get_duplex(struct port *port)
363 struct slave *slave = port->slave;
366 /* handling a special case: when the configuration starts with
367 * link down, it sets the duplex to 0.
369 if (slave->link == BOND_LINK_UP) {
370 switch (slave->duplex) {
373 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
374 port->actor_port_number);
379 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
380 port->actor_port_number);
387 static void __ad_actor_update_port(struct port *port)
389 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
391 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
392 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
398 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
399 * @timer_type: which timer to operate
400 * @par: timer parameter. see below
402 * If @timer_type is %current_while_timer, @par indicates long/short timer.
403 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
404 * %SLOW_PERIODIC_TIME.
406 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
408 u16 retval = 0; /* to silence the compiler */
410 switch (timer_type) {
411 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
413 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
415 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
417 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
418 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
420 case AD_PERIODIC_TIMER: /* for periodic machine */
421 retval = (par*ad_ticks_per_sec); /* long timeout */
423 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
424 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
426 case AD_WAIT_WHILE_TIMER: /* for selection machine */
427 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
435 /* ================= ad_rx_machine helper functions ================== */
438 * __choose_matched - update a port's matched variable from a received lacpdu
439 * @lacpdu: the lacpdu we've received
440 * @port: the port we're looking at
442 * Update the value of the matched variable, using parameter values from a
443 * newly received lacpdu. Parameter values for the partner carried in the
444 * received PDU are compared with the corresponding operational parameter
445 * values for the actor. Matched is set to TRUE if all of these parameters
446 * match and the PDU parameter partner_state.aggregation has the same value as
447 * actor_oper_port_state.aggregation and lacp will actively maintain the link
448 * in the aggregation. Matched is also set to TRUE if the value of
449 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
450 * an individual link and lacp will actively maintain the link. Otherwise,
451 * matched is set to FALSE. LACP is considered to be actively maintaining the
452 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
453 * the actor's actor_oper_port_state.lacp_activity and the PDU's
454 * partner_state.lacp_activity variables are TRUE.
456 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
457 * used here to implement the language from 802.3ad 43.4.9 that requires
458 * recordPDU to "match" the LACPDU parameters to the stored values.
460 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
462 /* check if all parameters are alike
463 * or this is individual link(aggregation == FALSE)
464 * then update the state machine Matched variable.
466 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
467 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
468 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
469 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
470 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
471 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
472 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
474 port->sm_vars |= AD_PORT_MATCHED;
476 port->sm_vars &= ~AD_PORT_MATCHED;
481 * __record_pdu - record parameters from a received lacpdu
482 * @lacpdu: the lacpdu we've received
483 * @port: the port we're looking at
485 * Record the parameter values for the Actor carried in a received lacpdu as
486 * the current partner operational parameter values and sets
487 * actor_oper_port_state.defaulted to FALSE.
489 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
491 if (lacpdu && port) {
492 struct port_params *partner = &port->partner_oper;
494 __choose_matched(lacpdu, port);
495 /* record the new parameter values for the partner
498 partner->port_number = ntohs(lacpdu->actor_port);
499 partner->port_priority = ntohs(lacpdu->actor_port_priority);
500 partner->system = lacpdu->actor_system;
501 partner->system_priority = ntohs(lacpdu->actor_system_priority);
502 partner->key = ntohs(lacpdu->actor_key);
503 partner->port_state = lacpdu->actor_state;
505 /* set actor_oper_port_state.defaulted to FALSE */
506 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
508 /* set the partner sync. to on if the partner is sync,
509 * and the port is matched
511 if ((port->sm_vars & AD_PORT_MATCHED) &&
512 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
513 partner->port_state |= AD_STATE_SYNCHRONIZATION;
514 pr_debug("%s partner sync=1\n", port->slave->dev->name);
516 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
517 pr_debug("%s partner sync=0\n", port->slave->dev->name);
523 * __record_default - record default parameters
524 * @port: the port we're looking at
526 * This function records the default parameter values for the partner carried
527 * in the Partner Admin parameters as the current partner operational parameter
528 * values and sets actor_oper_port_state.defaulted to TRUE.
530 static void __record_default(struct port *port)
533 /* record the partner admin parameters */
534 memcpy(&port->partner_oper, &port->partner_admin,
535 sizeof(struct port_params));
537 /* set actor_oper_port_state.defaulted to true */
538 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
543 * __update_selected - update a port's Selected variable from a received lacpdu
544 * @lacpdu: the lacpdu we've received
545 * @port: the port we're looking at
547 * Update the value of the selected variable, using parameter values from a
548 * newly received lacpdu. The parameter values for the Actor carried in the
549 * received PDU are compared with the corresponding operational parameter
550 * values for the ports partner. If one or more of the comparisons shows that
551 * the value(s) received in the PDU differ from the current operational values,
552 * then selected is set to FALSE and actor_oper_port_state.synchronization is
553 * set to out_of_sync. Otherwise, selected remains unchanged.
555 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
557 if (lacpdu && port) {
558 const struct port_params *partner = &port->partner_oper;
560 /* check if any parameter is different then
561 * update the state machine selected variable.
563 if (ntohs(lacpdu->actor_port) != partner->port_number ||
564 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
565 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
566 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
567 ntohs(lacpdu->actor_key) != partner->key ||
568 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
569 port->sm_vars &= ~AD_PORT_SELECTED;
575 * __update_default_selected - update a port's Selected variable from Partner
576 * @port: the port we're looking at
578 * This function updates the value of the selected variable, using the partner
579 * administrative parameter values. The administrative values are compared with
580 * the corresponding operational parameter values for the partner. If one or
581 * more of the comparisons shows that the administrative value(s) differ from
582 * the current operational values, then Selected is set to FALSE and
583 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
584 * Selected remains unchanged.
586 static void __update_default_selected(struct port *port)
589 const struct port_params *admin = &port->partner_admin;
590 const struct port_params *oper = &port->partner_oper;
592 /* check if any parameter is different then
593 * update the state machine selected variable.
595 if (admin->port_number != oper->port_number ||
596 admin->port_priority != oper->port_priority ||
597 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
598 admin->system_priority != oper->system_priority ||
599 admin->key != oper->key ||
600 (admin->port_state & AD_STATE_AGGREGATION)
601 != (oper->port_state & AD_STATE_AGGREGATION)) {
602 port->sm_vars &= ~AD_PORT_SELECTED;
608 * __update_ntt - update a port's ntt variable from a received lacpdu
609 * @lacpdu: the lacpdu we've received
610 * @port: the port we're looking at
612 * Updates the value of the ntt variable, using parameter values from a newly
613 * received lacpdu. The parameter values for the partner carried in the
614 * received PDU are compared with the corresponding operational parameter
615 * values for the Actor. If one or more of the comparisons shows that the
616 * value(s) received in the PDU differ from the current operational values,
617 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
619 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
621 /* validate lacpdu and port */
622 if (lacpdu && port) {
623 /* check if any parameter is different then
624 * update the port->ntt.
626 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
627 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
628 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
629 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
630 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
631 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
632 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
633 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
634 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
642 * __agg_ports_are_ready - check if all ports in an aggregator are ready
643 * @aggregator: the aggregator we're looking at
646 static int __agg_ports_are_ready(struct aggregator *aggregator)
652 /* scan all ports in this aggregator to verfy if they are
655 for (port = aggregator->lag_ports;
657 port = port->next_port_in_aggregator) {
658 if (!(port->sm_vars & AD_PORT_READY_N)) {
669 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
670 * @aggregator: the aggregator we're looking at
671 * @val: Should the ports' ready bit be set on or off
674 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
678 for (port = aggregator->lag_ports; port;
679 port = port->next_port_in_aggregator) {
681 port->sm_vars |= AD_PORT_READY;
683 port->sm_vars &= ~AD_PORT_READY;
687 static int __agg_active_ports(struct aggregator *agg)
692 for (port = agg->lag_ports; port;
693 port = port->next_port_in_aggregator) {
694 if (port->is_enabled)
702 * __get_agg_bandwidth - get the total bandwidth of an aggregator
703 * @aggregator: the aggregator we're looking at
706 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
708 int nports = __agg_active_ports(aggregator);
712 switch (__get_link_speed(aggregator->lag_ports)) {
713 case AD_LINK_SPEED_1MBPS:
716 case AD_LINK_SPEED_10MBPS:
717 bandwidth = nports * 10;
719 case AD_LINK_SPEED_100MBPS:
720 bandwidth = nports * 100;
722 case AD_LINK_SPEED_1000MBPS:
723 bandwidth = nports * 1000;
725 case AD_LINK_SPEED_2500MBPS:
726 bandwidth = nports * 2500;
728 case AD_LINK_SPEED_5000MBPS:
729 bandwidth = nports * 5000;
731 case AD_LINK_SPEED_10000MBPS:
732 bandwidth = nports * 10000;
734 case AD_LINK_SPEED_14000MBPS:
735 bandwidth = nports * 14000;
737 case AD_LINK_SPEED_20000MBPS:
738 bandwidth = nports * 20000;
740 case AD_LINK_SPEED_25000MBPS:
741 bandwidth = nports * 25000;
743 case AD_LINK_SPEED_40000MBPS:
744 bandwidth = nports * 40000;
746 case AD_LINK_SPEED_50000MBPS:
747 bandwidth = nports * 50000;
749 case AD_LINK_SPEED_56000MBPS:
750 bandwidth = nports * 56000;
752 case AD_LINK_SPEED_100000MBPS:
753 bandwidth = nports * 100000;
756 bandwidth = 0; /* to silence the compiler */
763 * __get_active_agg - get the current active aggregator
764 * @aggregator: the aggregator we're looking at
766 * Caller must hold RCU lock.
768 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
770 struct bonding *bond = aggregator->slave->bond;
771 struct list_head *iter;
774 bond_for_each_slave_rcu(bond, slave, iter)
775 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
776 return &(SLAVE_AD_INFO(slave)->aggregator);
782 * __update_lacpdu_from_port - update a port's lacpdu fields
783 * @port: the port we're looking at
785 static inline void __update_lacpdu_from_port(struct port *port)
787 struct lacpdu *lacpdu = &port->lacpdu;
788 const struct port_params *partner = &port->partner_oper;
790 /* update current actual Actor parameters
791 * lacpdu->subtype initialized
792 * lacpdu->version_number initialized
793 * lacpdu->tlv_type_actor_info initialized
794 * lacpdu->actor_information_length initialized
797 lacpdu->actor_system_priority = htons(port->actor_system_priority);
798 lacpdu->actor_system = port->actor_system;
799 lacpdu->actor_key = htons(port->actor_oper_port_key);
800 lacpdu->actor_port_priority = htons(port->actor_port_priority);
801 lacpdu->actor_port = htons(port->actor_port_number);
802 lacpdu->actor_state = port->actor_oper_port_state;
803 pr_debug("update lacpdu: %s, actor port state %x\n",
804 port->slave->dev->name, port->actor_oper_port_state);
806 /* lacpdu->reserved_3_1 initialized
807 * lacpdu->tlv_type_partner_info initialized
808 * lacpdu->partner_information_length initialized
811 lacpdu->partner_system_priority = htons(partner->system_priority);
812 lacpdu->partner_system = partner->system;
813 lacpdu->partner_key = htons(partner->key);
814 lacpdu->partner_port_priority = htons(partner->port_priority);
815 lacpdu->partner_port = htons(partner->port_number);
816 lacpdu->partner_state = partner->port_state;
818 /* lacpdu->reserved_3_2 initialized
819 * lacpdu->tlv_type_collector_info initialized
820 * lacpdu->collector_information_length initialized
821 * collector_max_delay initialized
822 * reserved_12[12] initialized
823 * tlv_type_terminator initialized
824 * terminator_length initialized
825 * reserved_50[50] initialized
829 /* ================= main 802.3ad protocol code ========================= */
832 * ad_lacpdu_send - send out a lacpdu packet on a given port
833 * @port: the port we're looking at
835 * Returns: 0 on success
838 static int ad_lacpdu_send(struct port *port)
840 struct slave *slave = port->slave;
842 struct lacpdu_header *lacpdu_header;
843 int length = sizeof(struct lacpdu_header);
845 skb = dev_alloc_skb(length);
849 skb->dev = slave->dev;
850 skb_reset_mac_header(skb);
851 skb->network_header = skb->mac_header + ETH_HLEN;
852 skb->protocol = PKT_TYPE_LACPDU;
853 skb->priority = TC_PRIO_CONTROL;
855 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
857 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
858 /* Note: source address is set to be the member's PERMANENT address,
859 * because we use it to identify loopback lacpdus in receive.
861 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
862 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
864 lacpdu_header->lacpdu = port->lacpdu;
872 * ad_marker_send - send marker information/response on a given port
873 * @port: the port we're looking at
874 * @marker: marker data to send
876 * Returns: 0 on success
879 static int ad_marker_send(struct port *port, struct bond_marker *marker)
881 struct slave *slave = port->slave;
883 struct bond_marker_header *marker_header;
884 int length = sizeof(struct bond_marker_header);
886 skb = dev_alloc_skb(length + 16);
890 skb_reserve(skb, 16);
892 skb->dev = slave->dev;
893 skb_reset_mac_header(skb);
894 skb->network_header = skb->mac_header + ETH_HLEN;
895 skb->protocol = PKT_TYPE_LACPDU;
897 marker_header = (struct bond_marker_header *)skb_put(skb, length);
899 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
900 /* Note: source address is set to be the member's PERMANENT address,
901 * because we use it to identify loopback MARKERs in receive.
903 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
904 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
906 marker_header->marker = *marker;
914 * ad_mux_machine - handle a port's mux state machine
915 * @port: the port we're looking at
916 * @update_slave_arr: Does slave array need update?
918 static void ad_mux_machine(struct port *port, bool *update_slave_arr)
920 mux_states_t last_state;
922 /* keep current State Machine state to compare later if it was
925 last_state = port->sm_mux_state;
927 if (port->sm_vars & AD_PORT_BEGIN) {
928 port->sm_mux_state = AD_MUX_DETACHED;
930 switch (port->sm_mux_state) {
931 case AD_MUX_DETACHED:
932 if ((port->sm_vars & AD_PORT_SELECTED)
933 || (port->sm_vars & AD_PORT_STANDBY))
934 /* if SELECTED or STANDBY */
935 port->sm_mux_state = AD_MUX_WAITING;
938 /* if SELECTED == FALSE return to DETACH state */
939 if (!(port->sm_vars & AD_PORT_SELECTED)) {
940 port->sm_vars &= ~AD_PORT_READY_N;
941 /* in order to withhold the Selection Logic to
942 * check all ports READY_N value every callback
943 * cycle to update ready variable, we check
944 * READY_N and update READY here
946 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
947 port->sm_mux_state = AD_MUX_DETACHED;
951 /* check if the wait_while_timer expired */
952 if (port->sm_mux_timer_counter
953 && !(--port->sm_mux_timer_counter))
954 port->sm_vars |= AD_PORT_READY_N;
956 /* in order to withhold the selection logic to check
957 * all ports READY_N value every callback cycle to
958 * update ready variable, we check READY_N and update
961 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
963 /* if the wait_while_timer expired, and the port is
964 * in READY state, move to ATTACHED state
966 if ((port->sm_vars & AD_PORT_READY)
967 && !port->sm_mux_timer_counter)
968 port->sm_mux_state = AD_MUX_ATTACHED;
970 case AD_MUX_ATTACHED:
971 /* check also if agg_select_timer expired (so the
972 * edable port will take place only after this timer)
974 if ((port->sm_vars & AD_PORT_SELECTED) &&
975 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
976 !__check_agg_selection_timer(port)) {
977 if (port->aggregator->is_active)
979 AD_MUX_COLLECTING_DISTRIBUTING;
980 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
981 (port->sm_vars & AD_PORT_STANDBY)) {
982 /* if UNSELECTED or STANDBY */
983 port->sm_vars &= ~AD_PORT_READY_N;
984 /* in order to withhold the selection logic to
985 * check all ports READY_N value every callback
986 * cycle to update ready variable, we check
987 * READY_N and update READY here
989 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
990 port->sm_mux_state = AD_MUX_DETACHED;
991 } else if (port->aggregator->is_active) {
992 port->actor_oper_port_state |=
993 AD_STATE_SYNCHRONIZATION;
996 case AD_MUX_COLLECTING_DISTRIBUTING:
997 if (!(port->sm_vars & AD_PORT_SELECTED) ||
998 (port->sm_vars & AD_PORT_STANDBY) ||
999 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
1000 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
1001 port->sm_mux_state = AD_MUX_ATTACHED;
1003 /* if port state hasn't changed make
1004 * sure that a collecting distributing
1005 * port in an active aggregator is enabled
1007 if (port->aggregator &&
1008 port->aggregator->is_active &&
1009 !__port_is_enabled(port)) {
1011 __enable_port(port);
1020 /* check if the state machine was changed */
1021 if (port->sm_mux_state != last_state) {
1022 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1023 port->actor_port_number,
1024 port->slave->dev->name,
1026 port->sm_mux_state);
1027 switch (port->sm_mux_state) {
1028 case AD_MUX_DETACHED:
1029 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1030 ad_disable_collecting_distributing(port,
1032 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1033 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1036 case AD_MUX_WAITING:
1037 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1039 case AD_MUX_ATTACHED:
1040 if (port->aggregator->is_active)
1041 port->actor_oper_port_state |=
1042 AD_STATE_SYNCHRONIZATION;
1044 port->actor_oper_port_state &=
1045 ~AD_STATE_SYNCHRONIZATION;
1046 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1047 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1048 ad_disable_collecting_distributing(port,
1052 case AD_MUX_COLLECTING_DISTRIBUTING:
1053 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1054 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1055 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1056 ad_enable_collecting_distributing(port,
1067 * ad_rx_machine - handle a port's rx State Machine
1068 * @lacpdu: the lacpdu we've received
1069 * @port: the port we're looking at
1071 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1072 * CURRENT. If timer expired set the state machine in the proper state.
1073 * In other cases, this function checks if we need to switch to other state.
1075 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1077 rx_states_t last_state;
1079 /* keep current State Machine state to compare later if it was
1082 last_state = port->sm_rx_state;
1084 /* check if state machine should change state */
1086 /* first, check if port was reinitialized */
1087 if (port->sm_vars & AD_PORT_BEGIN) {
1088 port->sm_rx_state = AD_RX_INITIALIZE;
1089 port->sm_vars |= AD_PORT_CHURNED;
1090 /* check if port is not enabled */
1091 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
1092 port->sm_rx_state = AD_RX_PORT_DISABLED;
1093 /* check if new lacpdu arrived */
1094 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1095 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1096 (port->sm_rx_state == AD_RX_CURRENT))) {
1097 if (port->sm_rx_state != AD_RX_CURRENT)
1098 port->sm_vars |= AD_PORT_CHURNED;
1099 port->sm_rx_timer_counter = 0;
1100 port->sm_rx_state = AD_RX_CURRENT;
1102 /* if timer is on, and if it is expired */
1103 if (port->sm_rx_timer_counter &&
1104 !(--port->sm_rx_timer_counter)) {
1105 switch (port->sm_rx_state) {
1107 port->sm_rx_state = AD_RX_DEFAULTED;
1110 port->sm_rx_state = AD_RX_EXPIRED;
1116 /* if no lacpdu arrived and no timer is on */
1117 switch (port->sm_rx_state) {
1118 case AD_RX_PORT_DISABLED:
1119 if (port->is_enabled &&
1120 (port->sm_vars & AD_PORT_LACP_ENABLED))
1121 port->sm_rx_state = AD_RX_EXPIRED;
1122 else if (port->is_enabled
1124 & AD_PORT_LACP_ENABLED) == 0))
1125 port->sm_rx_state = AD_RX_LACP_DISABLED;
1134 /* check if the State machine was changed or new lacpdu arrived */
1135 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1136 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1137 port->actor_port_number,
1138 port->slave->dev->name,
1141 switch (port->sm_rx_state) {
1142 case AD_RX_INITIALIZE:
1143 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1144 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1146 port->sm_vars |= AD_PORT_LACP_ENABLED;
1147 port->sm_vars &= ~AD_PORT_SELECTED;
1148 __record_default(port);
1149 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1150 port->sm_rx_state = AD_RX_PORT_DISABLED;
1153 case AD_RX_PORT_DISABLED:
1154 port->sm_vars &= ~AD_PORT_MATCHED;
1156 case AD_RX_LACP_DISABLED:
1157 port->sm_vars &= ~AD_PORT_SELECTED;
1158 __record_default(port);
1159 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1160 port->sm_vars |= AD_PORT_MATCHED;
1161 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1164 /* Reset of the Synchronization flag (Standard 43.4.12)
1165 * This reset cause to disable this port in the
1166 * COLLECTING_DISTRIBUTING state of the mux machine in
1167 * case of EXPIRED even if LINK_DOWN didn't arrive for
1170 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1171 port->sm_vars &= ~AD_PORT_MATCHED;
1172 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
1173 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1174 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1175 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1176 port->sm_vars |= AD_PORT_CHURNED;
1178 case AD_RX_DEFAULTED:
1179 __update_default_selected(port);
1180 __record_default(port);
1181 port->sm_vars |= AD_PORT_MATCHED;
1182 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1185 /* detect loopback situation */
1186 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1187 &(port->actor_system))) {
1188 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
1189 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1190 port->slave->dev->name);
1193 __update_selected(lacpdu, port);
1194 __update_ntt(lacpdu, port);
1195 __record_pdu(lacpdu, port);
1196 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1197 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1206 * ad_churn_machine - handle port churn's state machine
1207 * @port: the port we're looking at
1210 static void ad_churn_machine(struct port *port)
1212 if (port->sm_vars & AD_PORT_CHURNED) {
1213 port->sm_vars &= ~AD_PORT_CHURNED;
1214 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1215 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1216 port->sm_churn_actor_timer_counter =
1217 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1218 port->sm_churn_partner_timer_counter =
1219 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1222 if (port->sm_churn_actor_timer_counter &&
1223 !(--port->sm_churn_actor_timer_counter) &&
1224 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1225 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1226 port->sm_churn_actor_state = AD_NO_CHURN;
1228 port->churn_actor_count++;
1229 port->sm_churn_actor_state = AD_CHURN;
1232 if (port->sm_churn_partner_timer_counter &&
1233 !(--port->sm_churn_partner_timer_counter) &&
1234 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1235 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1236 port->sm_churn_partner_state = AD_NO_CHURN;
1238 port->churn_partner_count++;
1239 port->sm_churn_partner_state = AD_CHURN;
1245 * ad_tx_machine - handle a port's tx state machine
1246 * @port: the port we're looking at
1248 static void ad_tx_machine(struct port *port)
1250 /* check if tx timer expired, to verify that we do not send more than
1251 * 3 packets per second
1253 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1254 /* check if there is something to send */
1255 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1256 __update_lacpdu_from_port(port);
1258 if (ad_lacpdu_send(port) >= 0) {
1259 pr_debug("Sent LACPDU on port %d\n",
1260 port->actor_port_number);
1262 /* mark ntt as false, so it will not be sent
1263 * again until demanded
1268 /* restart tx timer(to verify that we will not exceed
1269 * AD_MAX_TX_IN_SECOND
1271 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1276 * ad_periodic_machine - handle a port's periodic state machine
1277 * @port: the port we're looking at
1279 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1281 static void ad_periodic_machine(struct port *port)
1283 periodic_states_t last_state;
1285 /* keep current state machine state to compare later if it was changed */
1286 last_state = port->sm_periodic_state;
1288 /* check if port was reinitialized */
1289 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1290 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1292 port->sm_periodic_state = AD_NO_PERIODIC;
1294 /* check if state machine should change state */
1295 else if (port->sm_periodic_timer_counter) {
1296 /* check if periodic state machine expired */
1297 if (!(--port->sm_periodic_timer_counter)) {
1298 /* if expired then do tx */
1299 port->sm_periodic_state = AD_PERIODIC_TX;
1301 /* If not expired, check if there is some new timeout
1302 * parameter from the partner state
1304 switch (port->sm_periodic_state) {
1305 case AD_FAST_PERIODIC:
1306 if (!(port->partner_oper.port_state
1307 & AD_STATE_LACP_TIMEOUT))
1308 port->sm_periodic_state = AD_SLOW_PERIODIC;
1310 case AD_SLOW_PERIODIC:
1311 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1312 port->sm_periodic_timer_counter = 0;
1313 port->sm_periodic_state = AD_PERIODIC_TX;
1321 switch (port->sm_periodic_state) {
1322 case AD_NO_PERIODIC:
1323 port->sm_periodic_state = AD_FAST_PERIODIC;
1325 case AD_PERIODIC_TX:
1326 if (!(port->partner_oper.port_state &
1327 AD_STATE_LACP_TIMEOUT))
1328 port->sm_periodic_state = AD_SLOW_PERIODIC;
1330 port->sm_periodic_state = AD_FAST_PERIODIC;
1337 /* check if the state machine was changed */
1338 if (port->sm_periodic_state != last_state) {
1339 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1340 port->actor_port_number, last_state,
1341 port->sm_periodic_state);
1342 switch (port->sm_periodic_state) {
1343 case AD_NO_PERIODIC:
1344 port->sm_periodic_timer_counter = 0;
1346 case AD_FAST_PERIODIC:
1347 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1348 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1350 case AD_SLOW_PERIODIC:
1351 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1352 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1354 case AD_PERIODIC_TX:
1364 * ad_port_selection_logic - select aggregation groups
1365 * @port: the port we're looking at
1366 * @update_slave_arr: Does slave array need update?
1368 * Select aggregation groups, and assign each port for it's aggregetor. The
1369 * selection logic is called in the inititalization (after all the handshkes),
1370 * and after every lacpdu receive (if selected is off).
1372 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1374 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1375 struct port *last_port = NULL, *curr_port;
1376 struct list_head *iter;
1377 struct bonding *bond;
1378 struct slave *slave;
1381 /* if the port is already Selected, do nothing */
1382 if (port->sm_vars & AD_PORT_SELECTED)
1385 bond = __get_bond_by_port(port);
1387 /* if the port is connected to other aggregator, detach it */
1388 if (port->aggregator) {
1389 /* detach the port from its former aggregator */
1390 temp_aggregator = port->aggregator;
1391 for (curr_port = temp_aggregator->lag_ports; curr_port;
1392 last_port = curr_port,
1393 curr_port = curr_port->next_port_in_aggregator) {
1394 if (curr_port == port) {
1395 temp_aggregator->num_of_ports--;
1396 /* if it is the first port attached to the
1400 temp_aggregator->lag_ports =
1401 port->next_port_in_aggregator;
1403 /* not the first port attached to the
1406 last_port->next_port_in_aggregator =
1407 port->next_port_in_aggregator;
1410 /* clear the port's relations to this
1413 port->aggregator = NULL;
1414 port->next_port_in_aggregator = NULL;
1415 port->actor_port_aggregator_identifier = 0;
1417 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1418 port->actor_port_number,
1419 temp_aggregator->aggregator_identifier);
1420 /* if the aggregator is empty, clear its
1421 * parameters, and set it ready to be attached
1423 if (!temp_aggregator->lag_ports)
1424 ad_clear_agg(temp_aggregator);
1429 /* meaning: the port was related to an aggregator
1430 * but was not on the aggregator port list
1432 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1433 port->slave->bond->dev->name,
1434 port->actor_port_number,
1435 port->slave->dev->name,
1436 port->aggregator->aggregator_identifier);
1439 /* search on all aggregators for a suitable aggregator for this port */
1440 bond_for_each_slave(bond, slave, iter) {
1441 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1443 /* keep a free aggregator for later use(if needed) */
1444 if (!aggregator->lag_ports) {
1445 if (!free_aggregator)
1446 free_aggregator = aggregator;
1449 /* check if current aggregator suits us */
1450 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1451 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1452 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1453 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1455 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1456 !aggregator->is_individual) /* but is not individual OR */
1459 /* attach to the founded aggregator */
1460 port->aggregator = aggregator;
1461 port->actor_port_aggregator_identifier =
1462 port->aggregator->aggregator_identifier;
1463 port->next_port_in_aggregator = aggregator->lag_ports;
1464 port->aggregator->num_of_ports++;
1465 aggregator->lag_ports = port;
1466 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1467 port->actor_port_number,
1468 port->aggregator->aggregator_identifier);
1470 /* mark this port as selected */
1471 port->sm_vars |= AD_PORT_SELECTED;
1477 /* the port couldn't find an aggregator - attach it to a new
1481 if (free_aggregator) {
1482 /* assign port a new aggregator */
1483 port->aggregator = free_aggregator;
1484 port->actor_port_aggregator_identifier =
1485 port->aggregator->aggregator_identifier;
1487 /* update the new aggregator's parameters
1488 * if port was responsed from the end-user
1490 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1491 /* if port is full duplex */
1492 port->aggregator->is_individual = false;
1494 port->aggregator->is_individual = true;
1496 port->aggregator->actor_admin_aggregator_key =
1497 port->actor_admin_port_key;
1498 port->aggregator->actor_oper_aggregator_key =
1499 port->actor_oper_port_key;
1500 port->aggregator->partner_system =
1501 port->partner_oper.system;
1502 port->aggregator->partner_system_priority =
1503 port->partner_oper.system_priority;
1504 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1505 port->aggregator->receive_state = 1;
1506 port->aggregator->transmit_state = 1;
1507 port->aggregator->lag_ports = port;
1508 port->aggregator->num_of_ports++;
1510 /* mark this port as selected */
1511 port->sm_vars |= AD_PORT_SELECTED;
1513 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1514 port->actor_port_number,
1515 port->aggregator->aggregator_identifier);
1517 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1518 port->actor_port_number, port->slave->dev->name);
1521 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1522 * in all aggregator's ports, else set ready=FALSE in all
1523 * aggregator's ports
1525 __set_agg_ports_ready(port->aggregator,
1526 __agg_ports_are_ready(port->aggregator));
1528 aggregator = __get_first_agg(port);
1529 ad_agg_selection_logic(aggregator, update_slave_arr);
1531 if (!port->aggregator->is_active)
1532 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1535 /* Decide if "agg" is a better choice for the new active aggregator that
1536 * the current best, according to the ad_select policy.
1538 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1539 struct aggregator *curr)
1541 /* 0. If no best, select current.
1543 * 1. If the current agg is not individual, and the best is
1544 * individual, select current.
1546 * 2. If current agg is individual and the best is not, keep best.
1548 * 3. Therefore, current and best are both individual or both not
1551 * 3a. If current agg partner replied, and best agg partner did not,
1554 * 3b. If current agg partner did not reply and best agg partner
1555 * did reply, keep best.
1557 * 4. Therefore, current and best both have partner replies or
1558 * both do not, so perform selection policy:
1560 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1561 * select by bandwidth.
1563 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1568 if (!curr->is_individual && best->is_individual)
1571 if (curr->is_individual && !best->is_individual)
1574 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1577 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1580 switch (__get_agg_selection_mode(curr->lag_ports)) {
1582 if (__agg_active_ports(curr) > __agg_active_ports(best))
1585 if (__agg_active_ports(curr) < __agg_active_ports(best))
1589 case BOND_AD_STABLE:
1590 case BOND_AD_BANDWIDTH:
1591 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1597 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1598 curr->slave->bond->dev->name,
1599 __get_agg_selection_mode(curr->lag_ports));
1606 static int agg_device_up(const struct aggregator *agg)
1608 struct port *port = agg->lag_ports;
1613 for (port = agg->lag_ports; port;
1614 port = port->next_port_in_aggregator) {
1615 if (netif_running(port->slave->dev) &&
1616 netif_carrier_ok(port->slave->dev))
1624 * ad_agg_selection_logic - select an aggregation group for a team
1625 * @aggregator: the aggregator we're looking at
1626 * @update_slave_arr: Does slave array need update?
1628 * It is assumed that only one aggregator may be selected for a team.
1630 * The logic of this function is to select the aggregator according to
1631 * the ad_select policy:
1633 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1634 * it, and to reselect the active aggregator only if the previous
1635 * aggregator has no more ports related to it.
1637 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1638 * bandwidth, and reselect whenever a link state change takes place or the
1639 * set of slaves in the bond changes.
1641 * BOND_AD_COUNT: select the aggregator with largest number of ports
1642 * (slaves), and reselect whenever a link state change takes place or the
1643 * set of slaves in the bond changes.
1645 * FIXME: this function MUST be called with the first agg in the bond, or
1646 * __get_active_agg() won't work correctly. This function should be better
1647 * called with the bond itself, and retrieve the first agg from it.
1649 static void ad_agg_selection_logic(struct aggregator *agg,
1650 bool *update_slave_arr)
1652 struct aggregator *best, *active, *origin;
1653 struct bonding *bond = agg->slave->bond;
1654 struct list_head *iter;
1655 struct slave *slave;
1660 active = __get_active_agg(agg);
1661 best = (active && agg_device_up(active)) ? active : NULL;
1663 bond_for_each_slave_rcu(bond, slave, iter) {
1664 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1668 if (__agg_active_ports(agg) && agg_device_up(agg))
1669 best = ad_agg_selection_test(best, agg);
1673 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1674 /* For the STABLE policy, don't replace the old active
1675 * aggregator if it's still active (it has an answering
1676 * partner) or if both the best and active don't have an
1677 * answering partner.
1679 if (active && active->lag_ports &&
1680 __agg_active_ports(active) &&
1681 (__agg_has_partner(active) ||
1682 (!__agg_has_partner(active) &&
1683 !__agg_has_partner(best)))) {
1684 if (!(!active->actor_oper_aggregator_key &&
1685 best->actor_oper_aggregator_key)) {
1687 active->is_active = 1;
1692 if (best && (best == active)) {
1694 active->is_active = 1;
1697 /* if there is new best aggregator, activate it */
1699 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1700 best->aggregator_identifier, best->num_of_ports,
1701 best->actor_oper_aggregator_key,
1702 best->partner_oper_aggregator_key,
1703 best->is_individual, best->is_active);
1704 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1705 best->lag_ports, best->slave,
1706 best->slave ? best->slave->dev->name : "NULL");
1708 bond_for_each_slave_rcu(bond, slave, iter) {
1709 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1711 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1712 agg->aggregator_identifier, agg->num_of_ports,
1713 agg->actor_oper_aggregator_key,
1714 agg->partner_oper_aggregator_key,
1715 agg->is_individual, agg->is_active);
1718 /* check if any partner replys */
1719 if (best->is_individual) {
1720 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1722 best->slave->bond->dev->name : "NULL");
1725 best->is_active = 1;
1726 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1727 best->aggregator_identifier);
1728 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1729 best->aggregator_identifier, best->num_of_ports,
1730 best->actor_oper_aggregator_key,
1731 best->partner_oper_aggregator_key,
1732 best->is_individual, best->is_active);
1734 /* disable the ports that were related to the former
1738 for (port = active->lag_ports; port;
1739 port = port->next_port_in_aggregator) {
1740 __disable_port(port);
1743 /* Slave array needs update. */
1744 *update_slave_arr = true;
1747 /* if the selected aggregator is of join individuals
1748 * (partner_system is NULL), enable their ports
1750 active = __get_active_agg(origin);
1753 if (!__agg_has_partner(active)) {
1754 for (port = active->lag_ports; port;
1755 port = port->next_port_in_aggregator) {
1756 __enable_port(port);
1763 bond_3ad_set_carrier(bond);
1767 * ad_clear_agg - clear a given aggregator's parameters
1768 * @aggregator: the aggregator we're looking at
1770 static void ad_clear_agg(struct aggregator *aggregator)
1773 aggregator->is_individual = false;
1774 aggregator->actor_admin_aggregator_key = 0;
1775 aggregator->actor_oper_aggregator_key = 0;
1776 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1777 aggregator->partner_system_priority = 0;
1778 aggregator->partner_oper_aggregator_key = 0;
1779 aggregator->receive_state = 0;
1780 aggregator->transmit_state = 0;
1781 aggregator->lag_ports = NULL;
1782 aggregator->is_active = 0;
1783 aggregator->num_of_ports = 0;
1784 pr_debug("LAG %d was cleared\n",
1785 aggregator->aggregator_identifier);
1790 * ad_initialize_agg - initialize a given aggregator's parameters
1791 * @aggregator: the aggregator we're looking at
1793 static void ad_initialize_agg(struct aggregator *aggregator)
1796 ad_clear_agg(aggregator);
1798 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1799 aggregator->aggregator_identifier = 0;
1800 aggregator->slave = NULL;
1805 * ad_initialize_port - initialize a given port's parameters
1806 * @aggregator: the aggregator we're looking at
1807 * @lacp_fast: boolean. whether fast periodic should be used
1809 static void ad_initialize_port(struct port *port, int lacp_fast)
1811 static const struct port_params tmpl = {
1812 .system_priority = 0xffff,
1815 .port_priority = 0xff,
1818 static const struct lacpdu lacpdu = {
1820 .version_number = 0x01,
1821 .tlv_type_actor_info = 0x01,
1822 .actor_information_length = 0x14,
1823 .tlv_type_partner_info = 0x02,
1824 .partner_information_length = 0x14,
1825 .tlv_type_collector_info = 0x03,
1826 .collector_information_length = 0x10,
1827 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1831 port->actor_port_priority = 0xff;
1832 port->actor_port_aggregator_identifier = 0;
1834 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1835 AD_STATE_LACP_ACTIVITY;
1836 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1837 AD_STATE_LACP_ACTIVITY;
1840 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1842 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1843 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1845 port->is_enabled = true;
1846 /* private parameters */
1847 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1848 port->sm_rx_state = 0;
1849 port->sm_rx_timer_counter = 0;
1850 port->sm_periodic_state = 0;
1851 port->sm_periodic_timer_counter = 0;
1852 port->sm_mux_state = 0;
1853 port->sm_mux_timer_counter = 0;
1854 port->sm_tx_state = 0;
1855 port->aggregator = NULL;
1856 port->next_port_in_aggregator = NULL;
1857 port->transaction_id = 0;
1859 port->sm_churn_actor_timer_counter = 0;
1860 port->sm_churn_actor_state = 0;
1861 port->churn_actor_count = 0;
1862 port->sm_churn_partner_timer_counter = 0;
1863 port->sm_churn_partner_state = 0;
1864 port->churn_partner_count = 0;
1866 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1871 * ad_enable_collecting_distributing - enable a port's transmit/receive
1872 * @port: the port we're looking at
1873 * @update_slave_arr: Does slave array need update?
1875 * Enable @port if it's in an active aggregator
1877 static void ad_enable_collecting_distributing(struct port *port,
1878 bool *update_slave_arr)
1880 if (port->aggregator->is_active) {
1881 pr_debug("Enabling port %d(LAG %d)\n",
1882 port->actor_port_number,
1883 port->aggregator->aggregator_identifier);
1884 __enable_port(port);
1885 /* Slave array needs update */
1886 *update_slave_arr = true;
1891 * ad_disable_collecting_distributing - disable a port's transmit/receive
1892 * @port: the port we're looking at
1893 * @update_slave_arr: Does slave array need update?
1895 static void ad_disable_collecting_distributing(struct port *port,
1896 bool *update_slave_arr)
1898 if (port->aggregator &&
1899 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1900 &(null_mac_addr))) {
1901 pr_debug("Disabling port %d(LAG %d)\n",
1902 port->actor_port_number,
1903 port->aggregator->aggregator_identifier);
1904 __disable_port(port);
1905 /* Slave array needs an update */
1906 *update_slave_arr = true;
1911 * ad_marker_info_received - handle receive of a Marker information frame
1912 * @marker_info: Marker info received
1913 * @port: the port we're looking at
1915 static void ad_marker_info_received(struct bond_marker *marker_info,
1918 struct bond_marker marker;
1920 /* copy the received marker data to the response marker */
1921 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1922 /* change the marker subtype to marker response */
1923 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1925 /* send the marker response */
1926 if (ad_marker_send(port, &marker) >= 0) {
1927 pr_debug("Sent Marker Response on port %d\n",
1928 port->actor_port_number);
1933 * ad_marker_response_received - handle receive of a marker response frame
1934 * @marker: marker PDU received
1935 * @port: the port we're looking at
1937 * This function does nothing since we decided not to implement send and handle
1938 * response for marker PDU's, in this stage, but only to respond to marker
1941 static void ad_marker_response_received(struct bond_marker *marker,
1944 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1947 /* ========= AD exported functions to the main bonding code ========= */
1949 /* Check aggregators status in team every T seconds */
1950 #define AD_AGGREGATOR_SELECTION_TIMER 8
1953 * bond_3ad_initiate_agg_selection - initate aggregator selection
1954 * @bond: bonding struct
1956 * Set the aggregation selection timer, to initiate an agg selection in
1957 * the very near future. Called during first initialization, and during
1958 * any down to up transitions of the bond.
1960 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1962 BOND_AD_INFO(bond).agg_select_timer = timeout;
1966 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1967 * @bond: bonding struct to work on
1968 * @tick_resolution: tick duration (millisecond resolution)
1970 * Can be called only after the mac address of the bond is set.
1972 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1974 /* check that the bond is not initialized yet */
1975 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1976 bond->dev->dev_addr)) {
1978 BOND_AD_INFO(bond).aggregator_identifier = 0;
1980 BOND_AD_INFO(bond).system.sys_priority =
1981 bond->params.ad_actor_sys_prio;
1982 if (is_zero_ether_addr(bond->params.ad_actor_system))
1983 BOND_AD_INFO(bond).system.sys_mac_addr =
1984 *((struct mac_addr *)bond->dev->dev_addr);
1986 BOND_AD_INFO(bond).system.sys_mac_addr =
1987 *((struct mac_addr *)bond->params.ad_actor_system);
1989 /* initialize how many times this module is called in one
1990 * second (should be about every 100ms)
1992 ad_ticks_per_sec = tick_resolution;
1994 bond_3ad_initiate_agg_selection(bond,
1995 AD_AGGREGATOR_SELECTION_TIMER *
2001 * bond_3ad_bind_slave - initialize a slave's port
2002 * @slave: slave struct to work on
2004 * Returns: 0 on success
2007 void bond_3ad_bind_slave(struct slave *slave)
2009 struct bonding *bond = bond_get_bond_by_slave(slave);
2011 struct aggregator *aggregator;
2013 /* check that the slave has not been initialized yet. */
2014 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
2016 /* port initialization */
2017 port = &(SLAVE_AD_INFO(slave)->port);
2019 ad_initialize_port(port, bond->params.lacp_fast);
2021 port->slave = slave;
2022 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
2023 /* key is determined according to the link speed, duplex and
2026 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
2027 ad_update_actor_keys(port, false);
2028 /* actor system is the bond's system */
2029 __ad_actor_update_port(port);
2030 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
2031 * lacpdu's are sent in one second)
2033 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
2035 __disable_port(port);
2037 /* aggregator initialization */
2038 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2040 ad_initialize_agg(aggregator);
2042 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2043 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2044 aggregator->slave = slave;
2045 aggregator->is_active = 0;
2046 aggregator->num_of_ports = 0;
2051 * bond_3ad_unbind_slave - deinitialize a slave's port
2052 * @slave: slave struct to work on
2054 * Search for the aggregator that is related to this port, remove the
2055 * aggregator and assign another aggregator for other port related to it
2056 * (if any), and remove the port.
2058 void bond_3ad_unbind_slave(struct slave *slave)
2060 struct port *port, *prev_port, *temp_port;
2061 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2062 int select_new_active_agg = 0;
2063 struct bonding *bond = slave->bond;
2064 struct slave *slave_iter;
2065 struct list_head *iter;
2066 bool dummy_slave_update; /* Ignore this value as caller updates array */
2068 /* Sync against bond_3ad_state_machine_handler() */
2069 spin_lock_bh(&bond->mode_lock);
2070 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2071 port = &(SLAVE_AD_INFO(slave)->port);
2073 /* if slave is null, the whole port is not initialized */
2075 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2080 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2081 aggregator->aggregator_identifier);
2083 /* Tell the partner that this port is not suitable for aggregation */
2084 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2085 __update_lacpdu_from_port(port);
2086 ad_lacpdu_send(port);
2088 /* check if this aggregator is occupied */
2089 if (aggregator->lag_ports) {
2090 /* check if there are other ports related to this aggregator
2091 * except the port related to this slave(thats ensure us that
2092 * there is a reason to search for new aggregator, and that we
2095 if ((aggregator->lag_ports != port) ||
2096 (aggregator->lag_ports->next_port_in_aggregator)) {
2097 /* find new aggregator for the related port(s) */
2098 bond_for_each_slave(bond, slave_iter, iter) {
2099 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2100 /* if the new aggregator is empty, or it is
2101 * connected to our port only
2103 if (!new_aggregator->lag_ports ||
2104 ((new_aggregator->lag_ports == port) &&
2105 !new_aggregator->lag_ports->next_port_in_aggregator))
2109 new_aggregator = NULL;
2111 /* if new aggregator found, copy the aggregator's
2112 * parameters and connect the related lag_ports to the
2115 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2116 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2117 aggregator->aggregator_identifier,
2118 new_aggregator->aggregator_identifier);
2120 if ((new_aggregator->lag_ports == port) &&
2121 new_aggregator->is_active) {
2122 netdev_info(bond->dev, "Removing an active aggregator\n");
2123 select_new_active_agg = 1;
2126 new_aggregator->is_individual = aggregator->is_individual;
2127 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2128 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2129 new_aggregator->partner_system = aggregator->partner_system;
2130 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2131 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2132 new_aggregator->receive_state = aggregator->receive_state;
2133 new_aggregator->transmit_state = aggregator->transmit_state;
2134 new_aggregator->lag_ports = aggregator->lag_ports;
2135 new_aggregator->is_active = aggregator->is_active;
2136 new_aggregator->num_of_ports = aggregator->num_of_ports;
2138 /* update the information that is written on
2139 * the ports about the aggregator
2141 for (temp_port = aggregator->lag_ports; temp_port;
2142 temp_port = temp_port->next_port_in_aggregator) {
2143 temp_port->aggregator = new_aggregator;
2144 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2147 ad_clear_agg(aggregator);
2149 if (select_new_active_agg)
2150 ad_agg_selection_logic(__get_first_agg(port),
2151 &dummy_slave_update);
2153 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2156 /* in case that the only port related to this
2157 * aggregator is the one we want to remove
2159 select_new_active_agg = aggregator->is_active;
2160 ad_clear_agg(aggregator);
2161 if (select_new_active_agg) {
2162 netdev_info(bond->dev, "Removing an active aggregator\n");
2163 /* select new active aggregator */
2164 temp_aggregator = __get_first_agg(port);
2165 if (temp_aggregator)
2166 ad_agg_selection_logic(temp_aggregator,
2167 &dummy_slave_update);
2172 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
2174 /* find the aggregator that this port is connected to */
2175 bond_for_each_slave(bond, slave_iter, iter) {
2176 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2178 /* search the port in the aggregator's related ports */
2179 for (temp_port = temp_aggregator->lag_ports; temp_port;
2180 prev_port = temp_port,
2181 temp_port = temp_port->next_port_in_aggregator) {
2182 if (temp_port == port) {
2183 /* the aggregator found - detach the port from
2187 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2189 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2190 temp_aggregator->num_of_ports--;
2191 if (__agg_active_ports(temp_aggregator) == 0) {
2192 select_new_active_agg = temp_aggregator->is_active;
2193 ad_clear_agg(temp_aggregator);
2194 if (select_new_active_agg) {
2195 netdev_info(bond->dev, "Removing an active aggregator\n");
2196 /* select new active aggregator */
2197 ad_agg_selection_logic(__get_first_agg(port),
2198 &dummy_slave_update);
2208 spin_unlock_bh(&bond->mode_lock);
2212 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2213 * @bond: bonding struct to work on
2215 * If an ad_actor setting gets changed we need to update the individual port
2216 * settings so the bond device will use the new values when it gets upped.
2218 void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2220 struct list_head *iter;
2221 struct slave *slave;
2225 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2226 if (is_zero_ether_addr(bond->params.ad_actor_system))
2227 BOND_AD_INFO(bond).system.sys_mac_addr =
2228 *((struct mac_addr *)bond->dev->dev_addr);
2230 BOND_AD_INFO(bond).system.sys_mac_addr =
2231 *((struct mac_addr *)bond->params.ad_actor_system);
2233 spin_lock_bh(&bond->mode_lock);
2234 bond_for_each_slave(bond, slave, iter) {
2235 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2237 __ad_actor_update_port(port);
2240 spin_unlock_bh(&bond->mode_lock);
2244 * bond_3ad_state_machine_handler - handle state machines timeout
2245 * @bond: bonding struct to work on
2247 * The state machine handling concept in this module is to check every tick
2248 * which state machine should operate any function. The execution order is
2249 * round robin, so when we have an interaction between state machines, the
2250 * reply of one to each other might be delayed until next tick.
2252 * This function also complete the initialization when the agg_select_timer
2253 * times out, and it selects an aggregator for the ports that are yet not
2254 * related to any aggregator, and selects the active aggregator for a bond.
2256 void bond_3ad_state_machine_handler(struct work_struct *work)
2258 struct bonding *bond = container_of(work, struct bonding,
2260 struct aggregator *aggregator;
2261 struct list_head *iter;
2262 struct slave *slave;
2264 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2265 bool update_slave_arr = false;
2267 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2268 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2269 * concurrently due to incoming LACPDU as well.
2271 spin_lock_bh(&bond->mode_lock);
2274 /* check if there are any slaves */
2275 if (!bond_has_slaves(bond))
2278 /* check if agg_select_timer timer after initialize is timed out */
2279 if (BOND_AD_INFO(bond).agg_select_timer &&
2280 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2281 slave = bond_first_slave_rcu(bond);
2282 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2284 /* select the active aggregator for the bond */
2287 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2292 aggregator = __get_first_agg(port);
2293 ad_agg_selection_logic(aggregator, &update_slave_arr);
2295 bond_3ad_set_carrier(bond);
2298 /* for each port run the state machines */
2299 bond_for_each_slave_rcu(bond, slave, iter) {
2300 port = &(SLAVE_AD_INFO(slave)->port);
2302 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2307 ad_rx_machine(NULL, port);
2308 ad_periodic_machine(port);
2309 ad_port_selection_logic(port, &update_slave_arr);
2310 ad_mux_machine(port, &update_slave_arr);
2311 ad_tx_machine(port);
2312 ad_churn_machine(port);
2314 /* turn off the BEGIN bit, since we already handled it */
2315 if (port->sm_vars & AD_PORT_BEGIN)
2316 port->sm_vars &= ~AD_PORT_BEGIN;
2320 bond_for_each_slave_rcu(bond, slave, iter) {
2321 if (slave->should_notify) {
2322 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2327 spin_unlock_bh(&bond->mode_lock);
2329 if (update_slave_arr)
2330 bond_slave_arr_work_rearm(bond, 0);
2332 if (should_notify_rtnl && rtnl_trylock()) {
2333 bond_slave_state_notify(bond);
2336 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2340 * bond_3ad_rx_indication - handle a received frame
2341 * @lacpdu: received lacpdu
2342 * @slave: slave struct to work on
2343 * @length: length of the data received
2345 * It is assumed that frames that were sent on this NIC don't returned as new
2346 * received frames (loopback). Since only the payload is given to this
2347 * function, it check for loopback.
2349 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2353 int ret = RX_HANDLER_ANOTHER;
2355 if (length >= sizeof(struct lacpdu)) {
2357 port = &(SLAVE_AD_INFO(slave)->port);
2360 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2361 slave->dev->name, slave->bond->dev->name);
2365 switch (lacpdu->subtype) {
2366 case AD_TYPE_LACPDU:
2367 ret = RX_HANDLER_CONSUMED;
2368 netdev_dbg(slave->bond->dev,
2369 "Received LACPDU on port %d slave %s\n",
2370 port->actor_port_number,
2372 /* Protect against concurrent state machines */
2373 spin_lock(&slave->bond->mode_lock);
2374 ad_rx_machine(lacpdu, port);
2375 spin_unlock(&slave->bond->mode_lock);
2378 case AD_TYPE_MARKER:
2379 ret = RX_HANDLER_CONSUMED;
2380 /* No need to convert fields to Little Endian since we
2381 * don't use the marker's fields.
2384 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2385 case AD_MARKER_INFORMATION_SUBTYPE:
2386 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2387 port->actor_port_number);
2388 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2391 case AD_MARKER_RESPONSE_SUBTYPE:
2392 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2393 port->actor_port_number);
2394 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2398 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2399 port->actor_port_number);
2407 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2408 * its current speed and duplex settings.
2410 * @port: the port we'are looking at
2411 * @reset: Boolean to just reset the speed and the duplex part of the key
2413 * The logic to change the oper / admin keys is:
2414 * (a) A full duplex port can participate in LACP with partner.
2415 * (b) When the speed is changed, LACP need to be reinitiated.
2417 static void ad_update_actor_keys(struct port *port, bool reset)
2420 u16 ospeed = 0, speed = 0;
2421 u16 old_oper_key = port->actor_oper_port_key;
2423 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2425 speed = __get_link_speed(port);
2426 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2427 duplex = __get_duplex(port);
2428 port->actor_admin_port_key |= (speed << 1) | duplex;
2430 port->actor_oper_port_key = port->actor_admin_port_key;
2432 if (old_oper_key != port->actor_oper_port_key) {
2433 /* Only 'duplex' port participates in LACP */
2435 port->sm_vars |= AD_PORT_LACP_ENABLED;
2437 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2441 netdev_err(port->slave->dev,
2442 "speed changed to 0 for port %s",
2443 port->slave->dev->name);
2444 } else if (duplex && ospeed != speed) {
2445 /* Speed change restarts LACP state-machine */
2446 port->sm_vars |= AD_PORT_BEGIN;
2453 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2456 * @slave: slave struct to work on
2458 * Handle reselection of aggregator (if needed) for this port.
2460 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2464 port = &(SLAVE_AD_INFO(slave)->port);
2466 /* if slave is null, the whole port is not initialized */
2468 netdev_warn(slave->bond->dev,
2469 "speed/duplex changed for uninitialized port %s\n",
2474 spin_lock_bh(&slave->bond->mode_lock);
2475 ad_update_actor_keys(port, false);
2476 spin_unlock_bh(&slave->bond->mode_lock);
2477 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
2478 port->actor_port_number, slave->dev->name);
2482 * bond_3ad_handle_link_change - handle a slave's link status change indication
2483 * @slave: slave struct to work on
2484 * @status: whether the link is now up or down
2486 * Handle reselection of aggregator (if needed) for this port.
2488 void bond_3ad_handle_link_change(struct slave *slave, char link)
2490 struct aggregator *agg;
2494 port = &(SLAVE_AD_INFO(slave)->port);
2496 /* if slave is null, the whole port is not initialized */
2498 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2503 spin_lock_bh(&slave->bond->mode_lock);
2504 /* on link down we are zeroing duplex and speed since
2505 * some of the adaptors(ce1000.lan) report full duplex/speed
2506 * instead of N/A(duplex) / 0(speed).
2508 * on link up we are forcing recheck on the duplex and speed since
2509 * some of he adaptors(ce1000.lan) report.
2511 if (link == BOND_LINK_UP) {
2512 port->is_enabled = true;
2513 ad_update_actor_keys(port, false);
2515 /* link has failed */
2516 port->is_enabled = false;
2517 ad_update_actor_keys(port, true);
2519 agg = __get_first_agg(port);
2520 ad_agg_selection_logic(agg, &dummy);
2522 spin_unlock_bh(&slave->bond->mode_lock);
2524 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2525 port->actor_port_number,
2526 link == BOND_LINK_UP ? "UP" : "DOWN");
2528 /* RTNL is held and mode_lock is released so it's safe
2529 * to update slave_array here.
2531 bond_update_slave_arr(slave->bond, NULL);
2535 * bond_3ad_set_carrier - set link state for bonding master
2536 * @bond - bonding structure
2538 * if we have an active aggregator, we're up, if not, we're down.
2539 * Presumes that we cannot have an active aggregator if there are
2540 * no slaves with link up.
2542 * This behavior complies with IEEE 802.3 section 43.3.9.
2544 * Called by bond_set_carrier(). Return zero if carrier state does not
2545 * change, nonzero if it does.
2547 int bond_3ad_set_carrier(struct bonding *bond)
2549 struct aggregator *active;
2550 struct slave *first_slave;
2554 first_slave = bond_first_slave_rcu(bond);
2559 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2561 /* are enough slaves available to consider link up? */
2562 if (__agg_active_ports(active) < bond->params.min_links) {
2563 if (netif_carrier_ok(bond->dev)) {
2564 netif_carrier_off(bond->dev);
2567 } else if (!netif_carrier_ok(bond->dev)) {
2568 netif_carrier_on(bond->dev);
2571 } else if (netif_carrier_ok(bond->dev)) {
2572 netif_carrier_off(bond->dev);
2580 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2581 * @bond: bonding struct to work on
2582 * @ad_info: ad_info struct to fill with the bond's info
2584 * Returns: 0 on success
2587 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2588 struct ad_info *ad_info)
2590 struct aggregator *aggregator = NULL;
2591 struct list_head *iter;
2592 struct slave *slave;
2595 bond_for_each_slave_rcu(bond, slave, iter) {
2596 port = &(SLAVE_AD_INFO(slave)->port);
2597 if (port->aggregator && port->aggregator->is_active) {
2598 aggregator = port->aggregator;
2606 ad_info->aggregator_id = aggregator->aggregator_identifier;
2607 ad_info->ports = __agg_active_ports(aggregator);
2608 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2609 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2610 ether_addr_copy(ad_info->partner_system,
2611 aggregator->partner_system.mac_addr_value);
2615 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2620 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2626 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2627 struct slave *slave)
2629 struct lacpdu *lacpdu, _lacpdu;
2631 if (skb->protocol != PKT_TYPE_LACPDU)
2632 return RX_HANDLER_ANOTHER;
2634 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2635 return RX_HANDLER_ANOTHER;
2637 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2639 return RX_HANDLER_ANOTHER;
2641 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
2645 * bond_3ad_update_lacp_rate - change the lacp rate
2646 * @bond - bonding struct
2648 * When modify lacp_rate parameter via sysfs,
2649 * update actor_oper_port_state of each port.
2651 * Hold bond->mode_lock,
2652 * so we can modify port->actor_oper_port_state,
2653 * no matter bond is up or down.
2655 void bond_3ad_update_lacp_rate(struct bonding *bond)
2657 struct port *port = NULL;
2658 struct list_head *iter;
2659 struct slave *slave;
2662 lacp_fast = bond->params.lacp_fast;
2663 spin_lock_bh(&bond->mode_lock);
2664 bond_for_each_slave(bond, slave, iter) {
2665 port = &(SLAVE_AD_INFO(slave)->port);
2667 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2669 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2671 spin_unlock_bh(&bond->mode_lock);