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_10000MBPS,
94 AD_LINK_SPEED_20000MBPS,
95 AD_LINK_SPEED_40000MBPS,
96 AD_LINK_SPEED_56000MBPS,
97 AD_LINK_SPEED_100000MBPS,
100 /* compare MAC addresses */
101 #define MAC_ADDRESS_EQUAL(A, B) \
102 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
104 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
107 static u16 ad_ticks_per_sec;
108 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
110 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
111 MULTICAST_LACPDU_ADDR;
113 /* ================= main 802.3ad protocol functions ================== */
114 static int ad_lacpdu_send(struct port *port);
115 static int ad_marker_send(struct port *port, struct bond_marker *marker);
116 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
117 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
118 static void ad_tx_machine(struct port *port);
119 static void ad_periodic_machine(struct port *port);
120 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
121 static void ad_agg_selection_logic(struct aggregator *aggregator,
122 bool *update_slave_arr);
123 static void ad_clear_agg(struct aggregator *aggregator);
124 static void ad_initialize_agg(struct aggregator *aggregator);
125 static void ad_initialize_port(struct port *port, int lacp_fast);
126 static void ad_enable_collecting_distributing(struct port *port,
127 bool *update_slave_arr);
128 static void ad_disable_collecting_distributing(struct port *port,
129 bool *update_slave_arr);
130 static void ad_marker_info_received(struct bond_marker *marker_info,
132 static void ad_marker_response_received(struct bond_marker *marker,
134 static void ad_update_actor_keys(struct port *port, bool reset);
137 /* ================= api to bonding and kernel code ================== */
140 * __get_bond_by_port - get the port's bonding struct
141 * @port: the port we're looking at
143 * Return @port's bonding struct, or %NULL if it can't be found.
145 static inline struct bonding *__get_bond_by_port(struct port *port)
147 if (port->slave == NULL)
150 return bond_get_bond_by_slave(port->slave);
154 * __get_first_agg - get the first aggregator in the bond
155 * @bond: the bond we're looking at
157 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
159 * The caller must hold RCU or RTNL lock.
161 static inline struct aggregator *__get_first_agg(struct port *port)
163 struct bonding *bond = __get_bond_by_port(port);
164 struct slave *first_slave;
165 struct aggregator *agg;
167 /* If there's no bond for this port, or bond has no slaves */
172 first_slave = bond_first_slave_rcu(bond);
173 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
180 * __agg_has_partner - see if we have a partner
181 * @agg: the agregator we're looking at
183 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
184 * address for the partner). Return 0 if not.
186 static inline int __agg_has_partner(struct aggregator *agg)
188 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
192 * __disable_port - disable the port's slave
193 * @port: the port we're looking at
195 static inline void __disable_port(struct port *port)
197 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
201 * __enable_port - enable the port's slave, if it's up
202 * @port: the port we're looking at
204 static inline void __enable_port(struct port *port)
206 struct slave *slave = port->slave;
208 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
209 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
213 * __port_is_enabled - check if the port's slave is in active state
214 * @port: the port we're looking at
216 static inline int __port_is_enabled(struct port *port)
218 return bond_is_active_slave(port->slave);
222 * __get_agg_selection_mode - get the aggregator selection mode
223 * @port: the port we're looking at
225 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
227 static inline u32 __get_agg_selection_mode(struct port *port)
229 struct bonding *bond = __get_bond_by_port(port);
232 return BOND_AD_STABLE;
234 return bond->params.ad_select;
238 * __check_agg_selection_timer - check if the selection timer has expired
239 * @port: the port we're looking at
241 static inline int __check_agg_selection_timer(struct port *port)
243 struct bonding *bond = __get_bond_by_port(port);
248 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
252 * __get_link_speed - get a port's speed
253 * @port: the port we're looking at
255 * Return @port's speed in 802.3ad enum format. i.e. one of:
257 * %AD_LINK_SPEED_10MBPS,
258 * %AD_LINK_SPEED_100MBPS,
259 * %AD_LINK_SPEED_1000MBPS,
260 * %AD_LINK_SPEED_2500MBPS,
261 * %AD_LINK_SPEED_10000MBPS
262 * %AD_LINK_SPEED_20000MBPS
263 * %AD_LINK_SPEED_40000MBPS
264 * %AD_LINK_SPEED_56000MBPS
265 * %AD_LINK_SPEED_100000MBPS
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_10MBPS;
286 speed = AD_LINK_SPEED_100MBPS;
290 speed = AD_LINK_SPEED_1000MBPS;
294 speed = AD_LINK_SPEED_2500MBPS;
298 speed = AD_LINK_SPEED_10000MBPS;
302 speed = AD_LINK_SPEED_20000MBPS;
306 speed = AD_LINK_SPEED_40000MBPS;
310 speed = AD_LINK_SPEED_56000MBPS;
314 speed = AD_LINK_SPEED_100000MBPS;
318 /* unknown speed value from ethtool. shouldn't happen */
324 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
325 port->actor_port_number, speed);
330 * __get_duplex - get a port's duplex
331 * @port: the port we're looking at
333 * Return @port's duplex in 802.3ad bitmask format. i.e.:
334 * 0x01 if in full duplex
337 static u8 __get_duplex(struct port *port)
339 struct slave *slave = port->slave;
342 /* handling a special case: when the configuration starts with
343 * link down, it sets the duplex to 0.
345 if (slave->link == BOND_LINK_UP) {
346 switch (slave->duplex) {
349 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
350 port->actor_port_number);
355 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
356 port->actor_port_number);
363 static void __ad_actor_update_port(struct port *port)
365 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
367 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
368 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
374 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
375 * @timer_type: which timer to operate
376 * @par: timer parameter. see below
378 * If @timer_type is %current_while_timer, @par indicates long/short timer.
379 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
380 * %SLOW_PERIODIC_TIME.
382 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
384 u16 retval = 0; /* to silence the compiler */
386 switch (timer_type) {
387 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
389 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
391 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
393 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
394 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
396 case AD_PERIODIC_TIMER: /* for periodic machine */
397 retval = (par*ad_ticks_per_sec); /* long timeout */
399 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
400 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
402 case AD_WAIT_WHILE_TIMER: /* for selection machine */
403 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
411 /* ================= ad_rx_machine helper functions ================== */
414 * __choose_matched - update a port's matched variable from a received lacpdu
415 * @lacpdu: the lacpdu we've received
416 * @port: the port we're looking at
418 * Update the value of the matched variable, using parameter values from a
419 * newly received lacpdu. Parameter values for the partner carried in the
420 * received PDU are compared with the corresponding operational parameter
421 * values for the actor. Matched is set to TRUE if all of these parameters
422 * match and the PDU parameter partner_state.aggregation has the same value as
423 * actor_oper_port_state.aggregation and lacp will actively maintain the link
424 * in the aggregation. Matched is also set to TRUE if the value of
425 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
426 * an individual link and lacp will actively maintain the link. Otherwise,
427 * matched is set to FALSE. LACP is considered to be actively maintaining the
428 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
429 * the actor's actor_oper_port_state.lacp_activity and the PDU's
430 * partner_state.lacp_activity variables are TRUE.
432 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
433 * used here to implement the language from 802.3ad 43.4.9 that requires
434 * recordPDU to "match" the LACPDU parameters to the stored values.
436 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
438 /* check if all parameters are alike
439 * or this is individual link(aggregation == FALSE)
440 * then update the state machine Matched variable.
442 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
443 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
444 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
445 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
446 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
447 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
448 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
450 port->sm_vars |= AD_PORT_MATCHED;
452 port->sm_vars &= ~AD_PORT_MATCHED;
457 * __record_pdu - record parameters from a received lacpdu
458 * @lacpdu: the lacpdu we've received
459 * @port: the port we're looking at
461 * Record the parameter values for the Actor carried in a received lacpdu as
462 * the current partner operational parameter values and sets
463 * actor_oper_port_state.defaulted to FALSE.
465 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
467 if (lacpdu && port) {
468 struct port_params *partner = &port->partner_oper;
470 __choose_matched(lacpdu, port);
471 /* record the new parameter values for the partner
474 partner->port_number = ntohs(lacpdu->actor_port);
475 partner->port_priority = ntohs(lacpdu->actor_port_priority);
476 partner->system = lacpdu->actor_system;
477 partner->system_priority = ntohs(lacpdu->actor_system_priority);
478 partner->key = ntohs(lacpdu->actor_key);
479 partner->port_state = lacpdu->actor_state;
481 /* set actor_oper_port_state.defaulted to FALSE */
482 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
484 /* set the partner sync. to on if the partner is sync,
485 * and the port is matched
487 if ((port->sm_vars & AD_PORT_MATCHED) &&
488 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
489 partner->port_state |= AD_STATE_SYNCHRONIZATION;
490 pr_debug("%s partner sync=1\n", port->slave->dev->name);
492 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
493 pr_debug("%s partner sync=0\n", port->slave->dev->name);
499 * __record_default - record default parameters
500 * @port: the port we're looking at
502 * This function records the default parameter values for the partner carried
503 * in the Partner Admin parameters as the current partner operational parameter
504 * values and sets actor_oper_port_state.defaulted to TRUE.
506 static void __record_default(struct port *port)
509 /* record the partner admin parameters */
510 memcpy(&port->partner_oper, &port->partner_admin,
511 sizeof(struct port_params));
513 /* set actor_oper_port_state.defaulted to true */
514 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
519 * __update_selected - update a port's Selected variable from a received lacpdu
520 * @lacpdu: the lacpdu we've received
521 * @port: the port we're looking at
523 * Update the value of the selected variable, using parameter values from a
524 * newly received lacpdu. The parameter values for the Actor carried in the
525 * received PDU are compared with the corresponding operational parameter
526 * values for the ports partner. If one or more of the comparisons shows that
527 * the value(s) received in the PDU differ from the current operational values,
528 * then selected is set to FALSE and actor_oper_port_state.synchronization is
529 * set to out_of_sync. Otherwise, selected remains unchanged.
531 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
533 if (lacpdu && port) {
534 const struct port_params *partner = &port->partner_oper;
536 /* check if any parameter is different then
537 * update the state machine selected variable.
539 if (ntohs(lacpdu->actor_port) != partner->port_number ||
540 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
541 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
542 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
543 ntohs(lacpdu->actor_key) != partner->key ||
544 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
545 port->sm_vars &= ~AD_PORT_SELECTED;
551 * __update_default_selected - update a port's Selected variable from Partner
552 * @port: the port we're looking at
554 * This function updates the value of the selected variable, using the partner
555 * administrative parameter values. The administrative values are compared with
556 * the corresponding operational parameter values for the partner. If one or
557 * more of the comparisons shows that the administrative value(s) differ from
558 * the current operational values, then Selected is set to FALSE and
559 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
560 * Selected remains unchanged.
562 static void __update_default_selected(struct port *port)
565 const struct port_params *admin = &port->partner_admin;
566 const struct port_params *oper = &port->partner_oper;
568 /* check if any parameter is different then
569 * update the state machine selected variable.
571 if (admin->port_number != oper->port_number ||
572 admin->port_priority != oper->port_priority ||
573 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
574 admin->system_priority != oper->system_priority ||
575 admin->key != oper->key ||
576 (admin->port_state & AD_STATE_AGGREGATION)
577 != (oper->port_state & AD_STATE_AGGREGATION)) {
578 port->sm_vars &= ~AD_PORT_SELECTED;
584 * __update_ntt - update a port's ntt variable from a received lacpdu
585 * @lacpdu: the lacpdu we've received
586 * @port: the port we're looking at
588 * Updates the value of the ntt variable, using parameter values from a newly
589 * received lacpdu. The parameter values for the partner carried in the
590 * received PDU are compared with the corresponding operational parameter
591 * values for the Actor. If one or more of the comparisons shows that the
592 * value(s) received in the PDU differ from the current operational values,
593 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
595 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
597 /* validate lacpdu and port */
598 if (lacpdu && port) {
599 /* check if any parameter is different then
600 * update the port->ntt.
602 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
603 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
604 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
605 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
606 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
607 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
608 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
609 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
610 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
618 * __agg_ports_are_ready - check if all ports in an aggregator are ready
619 * @aggregator: the aggregator we're looking at
622 static int __agg_ports_are_ready(struct aggregator *aggregator)
628 /* scan all ports in this aggregator to verfy if they are
631 for (port = aggregator->lag_ports;
633 port = port->next_port_in_aggregator) {
634 if (!(port->sm_vars & AD_PORT_READY_N)) {
645 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
646 * @aggregator: the aggregator we're looking at
647 * @val: Should the ports' ready bit be set on or off
650 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
654 for (port = aggregator->lag_ports; port;
655 port = port->next_port_in_aggregator) {
657 port->sm_vars |= AD_PORT_READY;
659 port->sm_vars &= ~AD_PORT_READY;
663 static int __agg_active_ports(struct aggregator *agg)
668 for (port = agg->lag_ports; port;
669 port = port->next_port_in_aggregator) {
670 if (port->is_enabled)
678 * __get_agg_bandwidth - get the total bandwidth of an aggregator
679 * @aggregator: the aggregator we're looking at
682 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
684 int nports = __agg_active_ports(aggregator);
688 switch (__get_link_speed(aggregator->lag_ports)) {
689 case AD_LINK_SPEED_1MBPS:
692 case AD_LINK_SPEED_10MBPS:
693 bandwidth = nports * 10;
695 case AD_LINK_SPEED_100MBPS:
696 bandwidth = nports * 100;
698 case AD_LINK_SPEED_1000MBPS:
699 bandwidth = nports * 1000;
701 case AD_LINK_SPEED_2500MBPS:
702 bandwidth = nports * 2500;
704 case AD_LINK_SPEED_10000MBPS:
705 bandwidth = nports * 10000;
707 case AD_LINK_SPEED_20000MBPS:
708 bandwidth = nports * 20000;
710 case AD_LINK_SPEED_40000MBPS:
711 bandwidth = nports * 40000;
713 case AD_LINK_SPEED_56000MBPS:
714 bandwidth = nports * 56000;
716 case AD_LINK_SPEED_100000MBPS:
717 bandwidth = nports * 100000;
720 bandwidth = 0; /* to silence the compiler */
727 * __get_active_agg - get the current active aggregator
728 * @aggregator: the aggregator we're looking at
730 * Caller must hold RCU lock.
732 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
734 struct bonding *bond = aggregator->slave->bond;
735 struct list_head *iter;
738 bond_for_each_slave_rcu(bond, slave, iter)
739 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
740 return &(SLAVE_AD_INFO(slave)->aggregator);
746 * __update_lacpdu_from_port - update a port's lacpdu fields
747 * @port: the port we're looking at
749 static inline void __update_lacpdu_from_port(struct port *port)
751 struct lacpdu *lacpdu = &port->lacpdu;
752 const struct port_params *partner = &port->partner_oper;
754 /* update current actual Actor parameters
755 * lacpdu->subtype initialized
756 * lacpdu->version_number initialized
757 * lacpdu->tlv_type_actor_info initialized
758 * lacpdu->actor_information_length initialized
761 lacpdu->actor_system_priority = htons(port->actor_system_priority);
762 lacpdu->actor_system = port->actor_system;
763 lacpdu->actor_key = htons(port->actor_oper_port_key);
764 lacpdu->actor_port_priority = htons(port->actor_port_priority);
765 lacpdu->actor_port = htons(port->actor_port_number);
766 lacpdu->actor_state = port->actor_oper_port_state;
767 pr_debug("update lacpdu: %s, actor port state %x\n",
768 port->slave->dev->name, port->actor_oper_port_state);
770 /* lacpdu->reserved_3_1 initialized
771 * lacpdu->tlv_type_partner_info initialized
772 * lacpdu->partner_information_length initialized
775 lacpdu->partner_system_priority = htons(partner->system_priority);
776 lacpdu->partner_system = partner->system;
777 lacpdu->partner_key = htons(partner->key);
778 lacpdu->partner_port_priority = htons(partner->port_priority);
779 lacpdu->partner_port = htons(partner->port_number);
780 lacpdu->partner_state = partner->port_state;
782 /* lacpdu->reserved_3_2 initialized
783 * lacpdu->tlv_type_collector_info initialized
784 * lacpdu->collector_information_length initialized
785 * collector_max_delay initialized
786 * reserved_12[12] initialized
787 * tlv_type_terminator initialized
788 * terminator_length initialized
789 * reserved_50[50] initialized
793 /* ================= main 802.3ad protocol code ========================= */
796 * ad_lacpdu_send - send out a lacpdu packet on a given port
797 * @port: the port we're looking at
799 * Returns: 0 on success
802 static int ad_lacpdu_send(struct port *port)
804 struct slave *slave = port->slave;
806 struct lacpdu_header *lacpdu_header;
807 int length = sizeof(struct lacpdu_header);
809 skb = dev_alloc_skb(length);
813 skb->dev = slave->dev;
814 skb_reset_mac_header(skb);
815 skb->network_header = skb->mac_header + ETH_HLEN;
816 skb->protocol = PKT_TYPE_LACPDU;
817 skb->priority = TC_PRIO_CONTROL;
819 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
821 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
822 /* Note: source address is set to be the member's PERMANENT address,
823 * because we use it to identify loopback lacpdus in receive.
825 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
826 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
828 lacpdu_header->lacpdu = port->lacpdu;
836 * ad_marker_send - send marker information/response on a given port
837 * @port: the port we're looking at
838 * @marker: marker data to send
840 * Returns: 0 on success
843 static int ad_marker_send(struct port *port, struct bond_marker *marker)
845 struct slave *slave = port->slave;
847 struct bond_marker_header *marker_header;
848 int length = sizeof(struct bond_marker_header);
850 skb = dev_alloc_skb(length + 16);
854 skb_reserve(skb, 16);
856 skb->dev = slave->dev;
857 skb_reset_mac_header(skb);
858 skb->network_header = skb->mac_header + ETH_HLEN;
859 skb->protocol = PKT_TYPE_LACPDU;
861 marker_header = (struct bond_marker_header *)skb_put(skb, length);
863 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
864 /* Note: source address is set to be the member's PERMANENT address,
865 * because we use it to identify loopback MARKERs in receive.
867 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
868 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
870 marker_header->marker = *marker;
878 * ad_mux_machine - handle a port's mux state machine
879 * @port: the port we're looking at
880 * @update_slave_arr: Does slave array need update?
882 static void ad_mux_machine(struct port *port, bool *update_slave_arr)
884 mux_states_t last_state;
886 /* keep current State Machine state to compare later if it was
889 last_state = port->sm_mux_state;
891 if (port->sm_vars & AD_PORT_BEGIN) {
892 port->sm_mux_state = AD_MUX_DETACHED;
894 switch (port->sm_mux_state) {
895 case AD_MUX_DETACHED:
896 if ((port->sm_vars & AD_PORT_SELECTED)
897 || (port->sm_vars & AD_PORT_STANDBY))
898 /* if SELECTED or STANDBY */
899 port->sm_mux_state = AD_MUX_WAITING;
902 /* if SELECTED == FALSE return to DETACH state */
903 if (!(port->sm_vars & AD_PORT_SELECTED)) {
904 port->sm_vars &= ~AD_PORT_READY_N;
905 /* in order to withhold the Selection Logic to
906 * check all ports READY_N value every callback
907 * cycle to update ready variable, we check
908 * READY_N and update READY here
910 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
911 port->sm_mux_state = AD_MUX_DETACHED;
915 /* check if the wait_while_timer expired */
916 if (port->sm_mux_timer_counter
917 && !(--port->sm_mux_timer_counter))
918 port->sm_vars |= AD_PORT_READY_N;
920 /* in order to withhold the selection logic to check
921 * all ports READY_N value every callback cycle to
922 * update ready variable, we check READY_N and update
925 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
927 /* if the wait_while_timer expired, and the port is
928 * in READY state, move to ATTACHED state
930 if ((port->sm_vars & AD_PORT_READY)
931 && !port->sm_mux_timer_counter)
932 port->sm_mux_state = AD_MUX_ATTACHED;
934 case AD_MUX_ATTACHED:
935 /* check also if agg_select_timer expired (so the
936 * edable port will take place only after this timer)
938 if ((port->sm_vars & AD_PORT_SELECTED) &&
939 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
940 !__check_agg_selection_timer(port)) {
941 if (port->aggregator->is_active)
943 AD_MUX_COLLECTING_DISTRIBUTING;
944 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
945 (port->sm_vars & AD_PORT_STANDBY)) {
946 /* if UNSELECTED or STANDBY */
947 port->sm_vars &= ~AD_PORT_READY_N;
948 /* in order to withhold the selection logic to
949 * check all ports READY_N value every callback
950 * cycle to update ready variable, we check
951 * READY_N and update READY here
953 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
954 port->sm_mux_state = AD_MUX_DETACHED;
955 } else if (port->aggregator->is_active) {
956 port->actor_oper_port_state |=
957 AD_STATE_SYNCHRONIZATION;
960 case AD_MUX_COLLECTING_DISTRIBUTING:
961 if (!(port->sm_vars & AD_PORT_SELECTED) ||
962 (port->sm_vars & AD_PORT_STANDBY) ||
963 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
964 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
965 port->sm_mux_state = AD_MUX_ATTACHED;
967 /* if port state hasn't changed make
968 * sure that a collecting distributing
969 * port in an active aggregator is enabled
971 if (port->aggregator &&
972 port->aggregator->is_active &&
973 !__port_is_enabled(port)) {
975 *update_slave_arr = true;
984 /* check if the state machine was changed */
985 if (port->sm_mux_state != last_state) {
986 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
987 port->actor_port_number,
988 port->slave->dev->name,
991 switch (port->sm_mux_state) {
992 case AD_MUX_DETACHED:
993 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
994 ad_disable_collecting_distributing(port,
996 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
997 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1000 case AD_MUX_WAITING:
1001 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1003 case AD_MUX_ATTACHED:
1004 if (port->aggregator->is_active)
1005 port->actor_oper_port_state |=
1006 AD_STATE_SYNCHRONIZATION;
1008 port->actor_oper_port_state &=
1009 ~AD_STATE_SYNCHRONIZATION;
1010 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1011 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1012 ad_disable_collecting_distributing(port,
1016 case AD_MUX_COLLECTING_DISTRIBUTING:
1017 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1018 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1019 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1020 ad_enable_collecting_distributing(port,
1031 * ad_rx_machine - handle a port's rx State Machine
1032 * @lacpdu: the lacpdu we've received
1033 * @port: the port we're looking at
1035 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1036 * CURRENT. If timer expired set the state machine in the proper state.
1037 * In other cases, this function checks if we need to switch to other state.
1039 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1041 rx_states_t last_state;
1043 /* keep current State Machine state to compare later if it was
1046 last_state = port->sm_rx_state;
1048 /* check if state machine should change state */
1050 /* first, check if port was reinitialized */
1051 if (port->sm_vars & AD_PORT_BEGIN) {
1052 port->sm_rx_state = AD_RX_INITIALIZE;
1053 port->sm_vars |= AD_PORT_CHURNED;
1054 /* check if port is not enabled */
1055 } else if (!(port->sm_vars & AD_PORT_BEGIN)
1056 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1057 port->sm_rx_state = AD_RX_PORT_DISABLED;
1058 /* check if new lacpdu arrived */
1059 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1060 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1061 (port->sm_rx_state == AD_RX_CURRENT))) {
1062 if (port->sm_rx_state != AD_RX_CURRENT)
1063 port->sm_vars |= AD_PORT_CHURNED;
1064 port->sm_rx_timer_counter = 0;
1065 port->sm_rx_state = AD_RX_CURRENT;
1067 /* if timer is on, and if it is expired */
1068 if (port->sm_rx_timer_counter &&
1069 !(--port->sm_rx_timer_counter)) {
1070 switch (port->sm_rx_state) {
1072 port->sm_rx_state = AD_RX_DEFAULTED;
1075 port->sm_rx_state = AD_RX_EXPIRED;
1081 /* if no lacpdu arrived and no timer is on */
1082 switch (port->sm_rx_state) {
1083 case AD_RX_PORT_DISABLED:
1084 if (port->sm_vars & AD_PORT_MOVED)
1085 port->sm_rx_state = AD_RX_INITIALIZE;
1086 else if (port->is_enabled
1088 & AD_PORT_LACP_ENABLED))
1089 port->sm_rx_state = AD_RX_EXPIRED;
1090 else if (port->is_enabled
1092 & AD_PORT_LACP_ENABLED) == 0))
1093 port->sm_rx_state = AD_RX_LACP_DISABLED;
1102 /* check if the State machine was changed or new lacpdu arrived */
1103 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1104 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1105 port->actor_port_number,
1106 port->slave->dev->name,
1109 switch (port->sm_rx_state) {
1110 case AD_RX_INITIALIZE:
1111 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1112 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1114 port->sm_vars |= AD_PORT_LACP_ENABLED;
1115 port->sm_vars &= ~AD_PORT_SELECTED;
1116 __record_default(port);
1117 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1118 port->sm_vars &= ~AD_PORT_MOVED;
1119 port->sm_rx_state = AD_RX_PORT_DISABLED;
1122 case AD_RX_PORT_DISABLED:
1123 port->sm_vars &= ~AD_PORT_MATCHED;
1125 case AD_RX_LACP_DISABLED:
1126 port->sm_vars &= ~AD_PORT_SELECTED;
1127 __record_default(port);
1128 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1129 port->sm_vars |= AD_PORT_MATCHED;
1130 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1133 /* Reset of the Synchronization flag (Standard 43.4.12)
1134 * This reset cause to disable this port in the
1135 * COLLECTING_DISTRIBUTING state of the mux machine in
1136 * case of EXPIRED even if LINK_DOWN didn't arrive for
1139 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1140 port->sm_vars &= ~AD_PORT_MATCHED;
1141 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
1142 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1143 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1144 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1145 port->sm_vars |= AD_PORT_CHURNED;
1147 case AD_RX_DEFAULTED:
1148 __update_default_selected(port);
1149 __record_default(port);
1150 port->sm_vars |= AD_PORT_MATCHED;
1151 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1154 /* detect loopback situation */
1155 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1156 &(port->actor_system))) {
1157 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
1158 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1159 port->slave->dev->name);
1162 __update_selected(lacpdu, port);
1163 __update_ntt(lacpdu, port);
1164 __record_pdu(lacpdu, port);
1165 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1166 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1175 * ad_churn_machine - handle port churn's state machine
1176 * @port: the port we're looking at
1179 static void ad_churn_machine(struct port *port)
1181 if (port->sm_vars & AD_PORT_CHURNED) {
1182 port->sm_vars &= ~AD_PORT_CHURNED;
1183 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1184 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1185 port->sm_churn_actor_timer_counter =
1186 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1187 port->sm_churn_partner_timer_counter =
1188 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1191 if (port->sm_churn_actor_timer_counter &&
1192 !(--port->sm_churn_actor_timer_counter) &&
1193 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1194 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1195 port->sm_churn_actor_state = AD_NO_CHURN;
1197 port->churn_actor_count++;
1198 port->sm_churn_actor_state = AD_CHURN;
1201 if (port->sm_churn_partner_timer_counter &&
1202 !(--port->sm_churn_partner_timer_counter) &&
1203 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1204 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1205 port->sm_churn_partner_state = AD_NO_CHURN;
1207 port->churn_partner_count++;
1208 port->sm_churn_partner_state = AD_CHURN;
1214 * ad_tx_machine - handle a port's tx state machine
1215 * @port: the port we're looking at
1217 static void ad_tx_machine(struct port *port)
1219 /* check if tx timer expired, to verify that we do not send more than
1220 * 3 packets per second
1222 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1223 /* check if there is something to send */
1224 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1225 __update_lacpdu_from_port(port);
1227 if (ad_lacpdu_send(port) >= 0) {
1228 pr_debug("Sent LACPDU on port %d\n",
1229 port->actor_port_number);
1231 /* mark ntt as false, so it will not be sent
1232 * again until demanded
1237 /* restart tx timer(to verify that we will not exceed
1238 * AD_MAX_TX_IN_SECOND
1240 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1245 * ad_periodic_machine - handle a port's periodic state machine
1246 * @port: the port we're looking at
1248 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1250 static void ad_periodic_machine(struct port *port)
1252 periodic_states_t last_state;
1254 /* keep current state machine state to compare later if it was changed */
1255 last_state = port->sm_periodic_state;
1257 /* check if port was reinitialized */
1258 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1259 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1261 port->sm_periodic_state = AD_NO_PERIODIC;
1263 /* check if state machine should change state */
1264 else if (port->sm_periodic_timer_counter) {
1265 /* check if periodic state machine expired */
1266 if (!(--port->sm_periodic_timer_counter)) {
1267 /* if expired then do tx */
1268 port->sm_periodic_state = AD_PERIODIC_TX;
1270 /* If not expired, check if there is some new timeout
1271 * parameter from the partner state
1273 switch (port->sm_periodic_state) {
1274 case AD_FAST_PERIODIC:
1275 if (!(port->partner_oper.port_state
1276 & AD_STATE_LACP_TIMEOUT))
1277 port->sm_periodic_state = AD_SLOW_PERIODIC;
1279 case AD_SLOW_PERIODIC:
1280 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1281 port->sm_periodic_timer_counter = 0;
1282 port->sm_periodic_state = AD_PERIODIC_TX;
1290 switch (port->sm_periodic_state) {
1291 case AD_NO_PERIODIC:
1292 port->sm_periodic_state = AD_FAST_PERIODIC;
1294 case AD_PERIODIC_TX:
1295 if (!(port->partner_oper.port_state &
1296 AD_STATE_LACP_TIMEOUT))
1297 port->sm_periodic_state = AD_SLOW_PERIODIC;
1299 port->sm_periodic_state = AD_FAST_PERIODIC;
1306 /* check if the state machine was changed */
1307 if (port->sm_periodic_state != last_state) {
1308 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1309 port->actor_port_number, last_state,
1310 port->sm_periodic_state);
1311 switch (port->sm_periodic_state) {
1312 case AD_NO_PERIODIC:
1313 port->sm_periodic_timer_counter = 0;
1315 case AD_FAST_PERIODIC:
1316 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1317 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1319 case AD_SLOW_PERIODIC:
1320 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1321 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1323 case AD_PERIODIC_TX:
1333 * ad_port_selection_logic - select aggregation groups
1334 * @port: the port we're looking at
1335 * @update_slave_arr: Does slave array need update?
1337 * Select aggregation groups, and assign each port for it's aggregetor. The
1338 * selection logic is called in the inititalization (after all the handshkes),
1339 * and after every lacpdu receive (if selected is off).
1341 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1343 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1344 struct port *last_port = NULL, *curr_port;
1345 struct list_head *iter;
1346 struct bonding *bond;
1347 struct slave *slave;
1350 /* if the port is already Selected, do nothing */
1351 if (port->sm_vars & AD_PORT_SELECTED)
1354 bond = __get_bond_by_port(port);
1356 /* if the port is connected to other aggregator, detach it */
1357 if (port->aggregator) {
1358 /* detach the port from its former aggregator */
1359 temp_aggregator = port->aggregator;
1360 for (curr_port = temp_aggregator->lag_ports; curr_port;
1361 last_port = curr_port,
1362 curr_port = curr_port->next_port_in_aggregator) {
1363 if (curr_port == port) {
1364 temp_aggregator->num_of_ports--;
1365 /* if it is the first port attached to the
1369 temp_aggregator->lag_ports =
1370 port->next_port_in_aggregator;
1372 /* not the first port attached to the
1375 last_port->next_port_in_aggregator =
1376 port->next_port_in_aggregator;
1379 /* clear the port's relations to this
1382 port->aggregator = NULL;
1383 port->next_port_in_aggregator = NULL;
1384 port->actor_port_aggregator_identifier = 0;
1386 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1387 port->actor_port_number,
1388 temp_aggregator->aggregator_identifier);
1389 /* if the aggregator is empty, clear its
1390 * parameters, and set it ready to be attached
1392 if (!temp_aggregator->lag_ports)
1393 ad_clear_agg(temp_aggregator);
1398 /* meaning: the port was related to an aggregator
1399 * but was not on the aggregator port list
1401 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1402 port->slave->bond->dev->name,
1403 port->actor_port_number,
1404 port->slave->dev->name,
1405 port->aggregator->aggregator_identifier);
1408 /* search on all aggregators for a suitable aggregator for this port */
1409 bond_for_each_slave(bond, slave, iter) {
1410 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1412 /* keep a free aggregator for later use(if needed) */
1413 if (!aggregator->lag_ports) {
1414 if (!free_aggregator)
1415 free_aggregator = aggregator;
1418 /* check if current aggregator suits us */
1419 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1420 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1421 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1422 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1424 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1425 !aggregator->is_individual) /* but is not individual OR */
1428 /* attach to the founded aggregator */
1429 port->aggregator = aggregator;
1430 port->actor_port_aggregator_identifier =
1431 port->aggregator->aggregator_identifier;
1432 port->next_port_in_aggregator = aggregator->lag_ports;
1433 port->aggregator->num_of_ports++;
1434 aggregator->lag_ports = port;
1435 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1436 port->actor_port_number,
1437 port->aggregator->aggregator_identifier);
1439 /* mark this port as selected */
1440 port->sm_vars |= AD_PORT_SELECTED;
1446 /* the port couldn't find an aggregator - attach it to a new
1450 if (free_aggregator) {
1451 /* assign port a new aggregator */
1452 port->aggregator = free_aggregator;
1453 port->actor_port_aggregator_identifier =
1454 port->aggregator->aggregator_identifier;
1456 /* update the new aggregator's parameters
1457 * if port was responsed from the end-user
1459 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1460 /* if port is full duplex */
1461 port->aggregator->is_individual = false;
1463 port->aggregator->is_individual = true;
1465 port->aggregator->actor_admin_aggregator_key =
1466 port->actor_admin_port_key;
1467 port->aggregator->actor_oper_aggregator_key =
1468 port->actor_oper_port_key;
1469 port->aggregator->partner_system =
1470 port->partner_oper.system;
1471 port->aggregator->partner_system_priority =
1472 port->partner_oper.system_priority;
1473 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1474 port->aggregator->receive_state = 1;
1475 port->aggregator->transmit_state = 1;
1476 port->aggregator->lag_ports = port;
1477 port->aggregator->num_of_ports++;
1479 /* mark this port as selected */
1480 port->sm_vars |= AD_PORT_SELECTED;
1482 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1483 port->actor_port_number,
1484 port->aggregator->aggregator_identifier);
1486 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1487 port->actor_port_number, port->slave->dev->name);
1490 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1491 * in all aggregator's ports, else set ready=FALSE in all
1492 * aggregator's ports
1494 __set_agg_ports_ready(port->aggregator,
1495 __agg_ports_are_ready(port->aggregator));
1497 aggregator = __get_first_agg(port);
1498 ad_agg_selection_logic(aggregator, update_slave_arr);
1500 if (!port->aggregator->is_active)
1501 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1504 /* Decide if "agg" is a better choice for the new active aggregator that
1505 * the current best, according to the ad_select policy.
1507 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1508 struct aggregator *curr)
1510 /* 0. If no best, select current.
1512 * 1. If the current agg is not individual, and the best is
1513 * individual, select current.
1515 * 2. If current agg is individual and the best is not, keep best.
1517 * 3. Therefore, current and best are both individual or both not
1520 * 3a. If current agg partner replied, and best agg partner did not,
1523 * 3b. If current agg partner did not reply and best agg partner
1524 * did reply, keep best.
1526 * 4. Therefore, current and best both have partner replies or
1527 * both do not, so perform selection policy:
1529 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1530 * select by bandwidth.
1532 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1537 if (!curr->is_individual && best->is_individual)
1540 if (curr->is_individual && !best->is_individual)
1543 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1546 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1549 switch (__get_agg_selection_mode(curr->lag_ports)) {
1551 if (__agg_active_ports(curr) > __agg_active_ports(best))
1554 if (__agg_active_ports(curr) < __agg_active_ports(best))
1558 case BOND_AD_STABLE:
1559 case BOND_AD_BANDWIDTH:
1560 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1566 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1567 curr->slave->bond->dev->name,
1568 __get_agg_selection_mode(curr->lag_ports));
1575 static int agg_device_up(const struct aggregator *agg)
1577 struct port *port = agg->lag_ports;
1582 for (port = agg->lag_ports; port;
1583 port = port->next_port_in_aggregator) {
1584 if (netif_running(port->slave->dev) &&
1585 netif_carrier_ok(port->slave->dev))
1593 * ad_agg_selection_logic - select an aggregation group for a team
1594 * @aggregator: the aggregator we're looking at
1595 * @update_slave_arr: Does slave array need update?
1597 * It is assumed that only one aggregator may be selected for a team.
1599 * The logic of this function is to select the aggregator according to
1600 * the ad_select policy:
1602 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1603 * it, and to reselect the active aggregator only if the previous
1604 * aggregator has no more ports related to it.
1606 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1607 * bandwidth, and reselect whenever a link state change takes place or the
1608 * set of slaves in the bond changes.
1610 * BOND_AD_COUNT: select the aggregator with largest number of ports
1611 * (slaves), and reselect whenever a link state change takes place or the
1612 * set of slaves in the bond changes.
1614 * FIXME: this function MUST be called with the first agg in the bond, or
1615 * __get_active_agg() won't work correctly. This function should be better
1616 * called with the bond itself, and retrieve the first agg from it.
1618 static void ad_agg_selection_logic(struct aggregator *agg,
1619 bool *update_slave_arr)
1621 struct aggregator *best, *active, *origin;
1622 struct bonding *bond = agg->slave->bond;
1623 struct list_head *iter;
1624 struct slave *slave;
1629 active = __get_active_agg(agg);
1630 best = (active && agg_device_up(active)) ? active : NULL;
1632 bond_for_each_slave_rcu(bond, slave, iter) {
1633 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1637 if (__agg_active_ports(agg) && agg_device_up(agg))
1638 best = ad_agg_selection_test(best, agg);
1642 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1643 /* For the STABLE policy, don't replace the old active
1644 * aggregator if it's still active (it has an answering
1645 * partner) or if both the best and active don't have an
1646 * answering partner.
1648 if (active && active->lag_ports &&
1649 __agg_active_ports(active) &&
1650 (__agg_has_partner(active) ||
1651 (!__agg_has_partner(active) &&
1652 !__agg_has_partner(best)))) {
1653 if (!(!active->actor_oper_aggregator_key &&
1654 best->actor_oper_aggregator_key)) {
1656 active->is_active = 1;
1661 if (best && (best == active)) {
1663 active->is_active = 1;
1666 /* if there is new best aggregator, activate it */
1668 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1669 best->aggregator_identifier, best->num_of_ports,
1670 best->actor_oper_aggregator_key,
1671 best->partner_oper_aggregator_key,
1672 best->is_individual, best->is_active);
1673 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1674 best->lag_ports, best->slave,
1675 best->slave ? best->slave->dev->name : "NULL");
1677 bond_for_each_slave_rcu(bond, slave, iter) {
1678 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1680 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1681 agg->aggregator_identifier, agg->num_of_ports,
1682 agg->actor_oper_aggregator_key,
1683 agg->partner_oper_aggregator_key,
1684 agg->is_individual, agg->is_active);
1687 /* check if any partner replys */
1688 if (best->is_individual) {
1689 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1691 best->slave->bond->dev->name : "NULL");
1694 best->is_active = 1;
1695 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1696 best->aggregator_identifier);
1697 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1698 best->aggregator_identifier, best->num_of_ports,
1699 best->actor_oper_aggregator_key,
1700 best->partner_oper_aggregator_key,
1701 best->is_individual, best->is_active);
1703 /* disable the ports that were related to the former
1707 for (port = active->lag_ports; port;
1708 port = port->next_port_in_aggregator) {
1709 __disable_port(port);
1712 /* Slave array needs update. */
1713 *update_slave_arr = true;
1716 /* if the selected aggregator is of join individuals
1717 * (partner_system is NULL), enable their ports
1719 active = __get_active_agg(origin);
1722 if (!__agg_has_partner(active)) {
1723 for (port = active->lag_ports; port;
1724 port = port->next_port_in_aggregator) {
1725 __enable_port(port);
1727 *update_slave_arr = true;
1733 bond_3ad_set_carrier(bond);
1737 * ad_clear_agg - clear a given aggregator's parameters
1738 * @aggregator: the aggregator we're looking at
1740 static void ad_clear_agg(struct aggregator *aggregator)
1743 aggregator->is_individual = false;
1744 aggregator->actor_admin_aggregator_key = 0;
1745 aggregator->actor_oper_aggregator_key = 0;
1746 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1747 aggregator->partner_system_priority = 0;
1748 aggregator->partner_oper_aggregator_key = 0;
1749 aggregator->receive_state = 0;
1750 aggregator->transmit_state = 0;
1751 aggregator->lag_ports = NULL;
1752 aggregator->is_active = 0;
1753 aggregator->num_of_ports = 0;
1754 pr_debug("LAG %d was cleared\n",
1755 aggregator->aggregator_identifier);
1760 * ad_initialize_agg - initialize a given aggregator's parameters
1761 * @aggregator: the aggregator we're looking at
1763 static void ad_initialize_agg(struct aggregator *aggregator)
1766 ad_clear_agg(aggregator);
1768 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1769 aggregator->aggregator_identifier = 0;
1770 aggregator->slave = NULL;
1775 * ad_initialize_port - initialize a given port's parameters
1776 * @aggregator: the aggregator we're looking at
1777 * @lacp_fast: boolean. whether fast periodic should be used
1779 static void ad_initialize_port(struct port *port, int lacp_fast)
1781 static const struct port_params tmpl = {
1782 .system_priority = 0xffff,
1785 .port_priority = 0xff,
1788 static const struct lacpdu lacpdu = {
1790 .version_number = 0x01,
1791 .tlv_type_actor_info = 0x01,
1792 .actor_information_length = 0x14,
1793 .tlv_type_partner_info = 0x02,
1794 .partner_information_length = 0x14,
1795 .tlv_type_collector_info = 0x03,
1796 .collector_information_length = 0x10,
1797 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1801 port->actor_port_priority = 0xff;
1802 port->actor_port_aggregator_identifier = 0;
1804 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1805 AD_STATE_LACP_ACTIVITY;
1806 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1807 AD_STATE_LACP_ACTIVITY;
1810 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1812 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1813 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1815 port->is_enabled = true;
1816 /* private parameters */
1817 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1818 port->sm_rx_state = 0;
1819 port->sm_rx_timer_counter = 0;
1820 port->sm_periodic_state = 0;
1821 port->sm_periodic_timer_counter = 0;
1822 port->sm_mux_state = 0;
1823 port->sm_mux_timer_counter = 0;
1824 port->sm_tx_state = 0;
1825 port->aggregator = NULL;
1826 port->next_port_in_aggregator = NULL;
1827 port->transaction_id = 0;
1829 port->sm_churn_actor_timer_counter = 0;
1830 port->sm_churn_actor_state = 0;
1831 port->churn_actor_count = 0;
1832 port->sm_churn_partner_timer_counter = 0;
1833 port->sm_churn_partner_state = 0;
1834 port->churn_partner_count = 0;
1836 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1841 * ad_enable_collecting_distributing - enable a port's transmit/receive
1842 * @port: the port we're looking at
1843 * @update_slave_arr: Does slave array need update?
1845 * Enable @port if it's in an active aggregator
1847 static void ad_enable_collecting_distributing(struct port *port,
1848 bool *update_slave_arr)
1850 if (port->aggregator->is_active) {
1851 pr_debug("Enabling port %d(LAG %d)\n",
1852 port->actor_port_number,
1853 port->aggregator->aggregator_identifier);
1854 __enable_port(port);
1855 /* Slave array needs update */
1856 *update_slave_arr = true;
1861 * ad_disable_collecting_distributing - disable a port's transmit/receive
1862 * @port: the port we're looking at
1863 * @update_slave_arr: Does slave array need update?
1865 static void ad_disable_collecting_distributing(struct port *port,
1866 bool *update_slave_arr)
1868 if (port->aggregator &&
1869 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1870 &(null_mac_addr))) {
1871 pr_debug("Disabling port %d(LAG %d)\n",
1872 port->actor_port_number,
1873 port->aggregator->aggregator_identifier);
1874 __disable_port(port);
1875 /* Slave array needs an update */
1876 *update_slave_arr = true;
1881 * ad_marker_info_received - handle receive of a Marker information frame
1882 * @marker_info: Marker info received
1883 * @port: the port we're looking at
1885 static void ad_marker_info_received(struct bond_marker *marker_info,
1888 struct bond_marker marker;
1890 /* copy the received marker data to the response marker */
1891 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1892 /* change the marker subtype to marker response */
1893 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1895 /* send the marker response */
1896 if (ad_marker_send(port, &marker) >= 0) {
1897 pr_debug("Sent Marker Response on port %d\n",
1898 port->actor_port_number);
1903 * ad_marker_response_received - handle receive of a marker response frame
1904 * @marker: marker PDU received
1905 * @port: the port we're looking at
1907 * This function does nothing since we decided not to implement send and handle
1908 * response for marker PDU's, in this stage, but only to respond to marker
1911 static void ad_marker_response_received(struct bond_marker *marker,
1914 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1917 /* ========= AD exported functions to the main bonding code ========= */
1919 /* Check aggregators status in team every T seconds */
1920 #define AD_AGGREGATOR_SELECTION_TIMER 8
1923 * bond_3ad_initiate_agg_selection - initate aggregator selection
1924 * @bond: bonding struct
1926 * Set the aggregation selection timer, to initiate an agg selection in
1927 * the very near future. Called during first initialization, and during
1928 * any down to up transitions of the bond.
1930 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1932 BOND_AD_INFO(bond).agg_select_timer = timeout;
1936 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1937 * @bond: bonding struct to work on
1938 * @tick_resolution: tick duration (millisecond resolution)
1940 * Can be called only after the mac address of the bond is set.
1942 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1944 BOND_AD_INFO(bond).aggregator_identifier = 0;
1945 BOND_AD_INFO(bond).system.sys_priority =
1946 bond->params.ad_actor_sys_prio;
1947 if (is_zero_ether_addr(bond->params.ad_actor_system))
1948 BOND_AD_INFO(bond).system.sys_mac_addr =
1949 *((struct mac_addr *)bond->dev->dev_addr);
1951 BOND_AD_INFO(bond).system.sys_mac_addr =
1952 *((struct mac_addr *)bond->params.ad_actor_system);
1954 /* initialize how many times this module is called in one
1955 * second (should be about every 100ms)
1957 ad_ticks_per_sec = tick_resolution;
1959 bond_3ad_initiate_agg_selection(bond,
1960 AD_AGGREGATOR_SELECTION_TIMER *
1965 * bond_3ad_bind_slave - initialize a slave's port
1966 * @slave: slave struct to work on
1968 * Returns: 0 on success
1971 void bond_3ad_bind_slave(struct slave *slave)
1973 struct bonding *bond = bond_get_bond_by_slave(slave);
1975 struct aggregator *aggregator;
1977 /* check that the slave has not been initialized yet. */
1978 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1980 /* port initialization */
1981 port = &(SLAVE_AD_INFO(slave)->port);
1983 ad_initialize_port(port, bond->params.lacp_fast);
1985 port->slave = slave;
1986 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
1987 /* key is determined according to the link speed, duplex and
1990 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
1991 ad_update_actor_keys(port, false);
1992 /* actor system is the bond's system */
1993 __ad_actor_update_port(port);
1994 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1995 * lacpdu's are sent in one second)
1997 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1999 __disable_port(port);
2001 /* aggregator initialization */
2002 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2004 ad_initialize_agg(aggregator);
2006 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2007 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2008 aggregator->slave = slave;
2009 aggregator->is_active = 0;
2010 aggregator->num_of_ports = 0;
2015 * bond_3ad_unbind_slave - deinitialize a slave's port
2016 * @slave: slave struct to work on
2018 * Search for the aggregator that is related to this port, remove the
2019 * aggregator and assign another aggregator for other port related to it
2020 * (if any), and remove the port.
2022 void bond_3ad_unbind_slave(struct slave *slave)
2024 struct port *port, *prev_port, *temp_port;
2025 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2026 int select_new_active_agg = 0;
2027 struct bonding *bond = slave->bond;
2028 struct slave *slave_iter;
2029 struct list_head *iter;
2030 bool dummy_slave_update; /* Ignore this value as caller updates array */
2032 /* Sync against bond_3ad_state_machine_handler() */
2033 spin_lock_bh(&bond->mode_lock);
2034 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2035 port = &(SLAVE_AD_INFO(slave)->port);
2037 /* if slave is null, the whole port is not initialized */
2039 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2044 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2045 aggregator->aggregator_identifier);
2047 /* Tell the partner that this port is not suitable for aggregation */
2048 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
2049 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
2050 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
2051 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2052 __update_lacpdu_from_port(port);
2053 ad_lacpdu_send(port);
2055 /* check if this aggregator is occupied */
2056 if (aggregator->lag_ports) {
2057 /* check if there are other ports related to this aggregator
2058 * except the port related to this slave(thats ensure us that
2059 * there is a reason to search for new aggregator, and that we
2062 if ((aggregator->lag_ports != port) ||
2063 (aggregator->lag_ports->next_port_in_aggregator)) {
2064 /* find new aggregator for the related port(s) */
2065 bond_for_each_slave(bond, slave_iter, iter) {
2066 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2067 /* if the new aggregator is empty, or it is
2068 * connected to our port only
2070 if (!new_aggregator->lag_ports ||
2071 ((new_aggregator->lag_ports == port) &&
2072 !new_aggregator->lag_ports->next_port_in_aggregator))
2076 new_aggregator = NULL;
2078 /* if new aggregator found, copy the aggregator's
2079 * parameters and connect the related lag_ports to the
2082 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2083 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2084 aggregator->aggregator_identifier,
2085 new_aggregator->aggregator_identifier);
2087 if ((new_aggregator->lag_ports == port) &&
2088 new_aggregator->is_active) {
2089 netdev_info(bond->dev, "Removing an active aggregator\n");
2090 select_new_active_agg = 1;
2093 new_aggregator->is_individual = aggregator->is_individual;
2094 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2095 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2096 new_aggregator->partner_system = aggregator->partner_system;
2097 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2098 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2099 new_aggregator->receive_state = aggregator->receive_state;
2100 new_aggregator->transmit_state = aggregator->transmit_state;
2101 new_aggregator->lag_ports = aggregator->lag_ports;
2102 new_aggregator->is_active = aggregator->is_active;
2103 new_aggregator->num_of_ports = aggregator->num_of_ports;
2105 /* update the information that is written on
2106 * the ports about the aggregator
2108 for (temp_port = aggregator->lag_ports; temp_port;
2109 temp_port = temp_port->next_port_in_aggregator) {
2110 temp_port->aggregator = new_aggregator;
2111 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2114 ad_clear_agg(aggregator);
2116 if (select_new_active_agg)
2117 ad_agg_selection_logic(__get_first_agg(port),
2118 &dummy_slave_update);
2120 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2123 /* in case that the only port related to this
2124 * aggregator is the one we want to remove
2126 select_new_active_agg = aggregator->is_active;
2127 ad_clear_agg(aggregator);
2128 if (select_new_active_agg) {
2129 netdev_info(bond->dev, "Removing an active aggregator\n");
2130 /* select new active aggregator */
2131 temp_aggregator = __get_first_agg(port);
2132 if (temp_aggregator)
2133 ad_agg_selection_logic(temp_aggregator,
2134 &dummy_slave_update);
2139 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
2141 /* find the aggregator that this port is connected to */
2142 bond_for_each_slave(bond, slave_iter, iter) {
2143 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2145 /* search the port in the aggregator's related ports */
2146 for (temp_port = temp_aggregator->lag_ports; temp_port;
2147 prev_port = temp_port,
2148 temp_port = temp_port->next_port_in_aggregator) {
2149 if (temp_port == port) {
2150 /* the aggregator found - detach the port from
2154 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2156 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2157 temp_aggregator->num_of_ports--;
2158 if (__agg_active_ports(temp_aggregator) == 0) {
2159 select_new_active_agg = temp_aggregator->is_active;
2160 if (temp_aggregator->num_of_ports == 0)
2161 ad_clear_agg(temp_aggregator);
2162 if (select_new_active_agg) {
2163 netdev_info(bond->dev, "Removing an active aggregator\n");
2164 /* select new active aggregator */
2165 ad_agg_selection_logic(__get_first_agg(port),
2166 &dummy_slave_update);
2176 spin_unlock_bh(&bond->mode_lock);
2180 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2181 * @bond: bonding struct to work on
2183 * If an ad_actor setting gets changed we need to update the individual port
2184 * settings so the bond device will use the new values when it gets upped.
2186 void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2188 struct list_head *iter;
2189 struct slave *slave;
2193 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2194 if (is_zero_ether_addr(bond->params.ad_actor_system))
2195 BOND_AD_INFO(bond).system.sys_mac_addr =
2196 *((struct mac_addr *)bond->dev->dev_addr);
2198 BOND_AD_INFO(bond).system.sys_mac_addr =
2199 *((struct mac_addr *)bond->params.ad_actor_system);
2201 spin_lock_bh(&bond->mode_lock);
2202 bond_for_each_slave(bond, slave, iter) {
2203 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2205 __ad_actor_update_port(port);
2208 spin_unlock_bh(&bond->mode_lock);
2212 * bond_3ad_state_machine_handler - handle state machines timeout
2213 * @bond: bonding struct to work on
2215 * The state machine handling concept in this module is to check every tick
2216 * which state machine should operate any function. The execution order is
2217 * round robin, so when we have an interaction between state machines, the
2218 * reply of one to each other might be delayed until next tick.
2220 * This function also complete the initialization when the agg_select_timer
2221 * times out, and it selects an aggregator for the ports that are yet not
2222 * related to any aggregator, and selects the active aggregator for a bond.
2224 void bond_3ad_state_machine_handler(struct work_struct *work)
2226 struct bonding *bond = container_of(work, struct bonding,
2228 struct aggregator *aggregator;
2229 struct list_head *iter;
2230 struct slave *slave;
2232 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2233 bool update_slave_arr = false;
2235 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2236 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2237 * concurrently due to incoming LACPDU as well.
2239 spin_lock_bh(&bond->mode_lock);
2242 /* check if there are any slaves */
2243 if (!bond_has_slaves(bond))
2246 /* check if agg_select_timer timer after initialize is timed out */
2247 if (BOND_AD_INFO(bond).agg_select_timer &&
2248 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2249 slave = bond_first_slave_rcu(bond);
2250 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2252 /* select the active aggregator for the bond */
2255 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2260 aggregator = __get_first_agg(port);
2261 ad_agg_selection_logic(aggregator, &update_slave_arr);
2263 bond_3ad_set_carrier(bond);
2266 /* for each port run the state machines */
2267 bond_for_each_slave_rcu(bond, slave, iter) {
2268 port = &(SLAVE_AD_INFO(slave)->port);
2270 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2275 ad_rx_machine(NULL, port);
2276 ad_periodic_machine(port);
2277 ad_port_selection_logic(port, &update_slave_arr);
2278 ad_mux_machine(port, &update_slave_arr);
2279 ad_tx_machine(port);
2280 ad_churn_machine(port);
2282 /* turn off the BEGIN bit, since we already handled it */
2283 if (port->sm_vars & AD_PORT_BEGIN)
2284 port->sm_vars &= ~AD_PORT_BEGIN;
2288 bond_for_each_slave_rcu(bond, slave, iter) {
2289 if (slave->should_notify) {
2290 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2295 spin_unlock_bh(&bond->mode_lock);
2297 if (update_slave_arr)
2298 bond_slave_arr_work_rearm(bond, 0);
2300 if (should_notify_rtnl && rtnl_trylock()) {
2301 bond_slave_state_notify(bond);
2304 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2308 * bond_3ad_rx_indication - handle a received frame
2309 * @lacpdu: received lacpdu
2310 * @slave: slave struct to work on
2311 * @length: length of the data received
2313 * It is assumed that frames that were sent on this NIC don't returned as new
2314 * received frames (loopback). Since only the payload is given to this
2315 * function, it check for loopback.
2317 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2321 int ret = RX_HANDLER_ANOTHER;
2323 if (length >= sizeof(struct lacpdu)) {
2325 port = &(SLAVE_AD_INFO(slave)->port);
2328 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2329 slave->dev->name, slave->bond->dev->name);
2333 switch (lacpdu->subtype) {
2334 case AD_TYPE_LACPDU:
2335 ret = RX_HANDLER_CONSUMED;
2336 netdev_dbg(slave->bond->dev,
2337 "Received LACPDU on port %d slave %s\n",
2338 port->actor_port_number,
2340 /* Protect against concurrent state machines */
2341 spin_lock(&slave->bond->mode_lock);
2342 ad_rx_machine(lacpdu, port);
2343 spin_unlock(&slave->bond->mode_lock);
2346 case AD_TYPE_MARKER:
2347 ret = RX_HANDLER_CONSUMED;
2348 /* No need to convert fields to Little Endian since we
2349 * don't use the marker's fields.
2352 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2353 case AD_MARKER_INFORMATION_SUBTYPE:
2354 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2355 port->actor_port_number);
2356 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2359 case AD_MARKER_RESPONSE_SUBTYPE:
2360 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2361 port->actor_port_number);
2362 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2366 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2367 port->actor_port_number);
2375 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2376 * its current speed and duplex settings.
2378 * @port: the port we'are looking at
2379 * @reset: Boolean to just reset the speed and the duplex part of the key
2381 * The logic to change the oper / admin keys is:
2382 * (a) A full duplex port can participate in LACP with partner.
2383 * (b) When the speed is changed, LACP need to be reinitiated.
2385 static void ad_update_actor_keys(struct port *port, bool reset)
2388 u16 ospeed = 0, speed = 0;
2389 u16 old_oper_key = port->actor_oper_port_key;
2391 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2393 speed = __get_link_speed(port);
2394 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2395 duplex = __get_duplex(port);
2396 port->actor_admin_port_key |= (speed << 1) | duplex;
2398 port->actor_oper_port_key = port->actor_admin_port_key;
2400 if (old_oper_key != port->actor_oper_port_key) {
2401 /* Only 'duplex' port participates in LACP */
2403 port->sm_vars |= AD_PORT_LACP_ENABLED;
2405 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2409 netdev_err(port->slave->dev,
2410 "speed changed to 0 for port %s",
2411 port->slave->dev->name);
2412 } else if (duplex && ospeed != speed) {
2413 /* Speed change restarts LACP state-machine */
2414 port->sm_vars |= AD_PORT_BEGIN;
2421 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2424 * @slave: slave struct to work on
2426 * Handle reselection of aggregator (if needed) for this port.
2428 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2432 port = &(SLAVE_AD_INFO(slave)->port);
2434 /* if slave is null, the whole port is not initialized */
2436 netdev_warn(slave->bond->dev,
2437 "speed/duplex changed for uninitialized port %s\n",
2442 spin_lock_bh(&slave->bond->mode_lock);
2443 ad_update_actor_keys(port, false);
2444 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
2445 port->actor_port_number, slave->dev->name);
2446 spin_unlock_bh(&slave->bond->mode_lock);
2450 * bond_3ad_handle_link_change - handle a slave's link status change indication
2451 * @slave: slave struct to work on
2452 * @status: whether the link is now up or down
2454 * Handle reselection of aggregator (if needed) for this port.
2456 void bond_3ad_handle_link_change(struct slave *slave, char link)
2458 struct aggregator *agg;
2462 port = &(SLAVE_AD_INFO(slave)->port);
2464 /* if slave is null, the whole port is not initialized */
2466 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2471 spin_lock_bh(&slave->bond->mode_lock);
2472 /* on link down we are zeroing duplex and speed since
2473 * some of the adaptors(ce1000.lan) report full duplex/speed
2474 * instead of N/A(duplex) / 0(speed).
2476 * on link up we are forcing recheck on the duplex and speed since
2477 * some of he adaptors(ce1000.lan) report.
2479 if (link == BOND_LINK_UP) {
2480 port->is_enabled = true;
2481 ad_update_actor_keys(port, false);
2483 /* link has failed */
2484 port->is_enabled = false;
2485 ad_update_actor_keys(port, true);
2487 agg = __get_first_agg(port);
2488 ad_agg_selection_logic(agg, &dummy);
2490 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2491 port->actor_port_number,
2492 link == BOND_LINK_UP ? "UP" : "DOWN");
2494 spin_unlock_bh(&slave->bond->mode_lock);
2496 /* RTNL is held and mode_lock is released so it's safe
2497 * to update slave_array here.
2499 bond_update_slave_arr(slave->bond, NULL);
2503 * bond_3ad_set_carrier - set link state for bonding master
2504 * @bond - bonding structure
2506 * if we have an active aggregator, we're up, if not, we're down.
2507 * Presumes that we cannot have an active aggregator if there are
2508 * no slaves with link up.
2510 * This behavior complies with IEEE 802.3 section 43.3.9.
2512 * Called by bond_set_carrier(). Return zero if carrier state does not
2513 * change, nonzero if it does.
2515 int bond_3ad_set_carrier(struct bonding *bond)
2517 struct aggregator *active;
2518 struct slave *first_slave;
2522 first_slave = bond_first_slave_rcu(bond);
2527 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2529 /* are enough slaves available to consider link up? */
2530 if (__agg_active_ports(active) < bond->params.min_links) {
2531 if (netif_carrier_ok(bond->dev)) {
2532 netif_carrier_off(bond->dev);
2535 } else if (!netif_carrier_ok(bond->dev)) {
2536 netif_carrier_on(bond->dev);
2539 } else if (netif_carrier_ok(bond->dev)) {
2540 netif_carrier_off(bond->dev);
2548 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2549 * @bond: bonding struct to work on
2550 * @ad_info: ad_info struct to fill with the bond's info
2552 * Returns: 0 on success
2555 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2556 struct ad_info *ad_info)
2558 struct aggregator *aggregator = NULL;
2559 struct list_head *iter;
2560 struct slave *slave;
2563 bond_for_each_slave_rcu(bond, slave, iter) {
2564 port = &(SLAVE_AD_INFO(slave)->port);
2565 if (port->aggregator && port->aggregator->is_active) {
2566 aggregator = port->aggregator;
2574 ad_info->aggregator_id = aggregator->aggregator_identifier;
2575 ad_info->ports = __agg_active_ports(aggregator);
2576 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2577 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2578 ether_addr_copy(ad_info->partner_system,
2579 aggregator->partner_system.mac_addr_value);
2583 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2588 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2594 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2595 struct slave *slave)
2597 struct lacpdu *lacpdu, _lacpdu;
2599 if (skb->protocol != PKT_TYPE_LACPDU)
2600 return RX_HANDLER_ANOTHER;
2602 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2603 return RX_HANDLER_ANOTHER;
2605 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2607 return RX_HANDLER_ANOTHER;
2609 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
2613 * bond_3ad_update_lacp_rate - change the lacp rate
2614 * @bond - bonding struct
2616 * When modify lacp_rate parameter via sysfs,
2617 * update actor_oper_port_state of each port.
2619 * Hold bond->mode_lock,
2620 * so we can modify port->actor_oper_port_state,
2621 * no matter bond is up or down.
2623 void bond_3ad_update_lacp_rate(struct bonding *bond)
2625 struct port *port = NULL;
2626 struct list_head *iter;
2627 struct slave *slave;
2630 lacp_fast = bond->params.lacp_fast;
2631 spin_lock_bh(&bond->mode_lock);
2632 bond_for_each_slave(bond, slave, iter) {
2633 port = &(SLAVE_AD_INFO(slave)->port);
2635 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2637 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2639 spin_unlock_bh(&bond->mode_lock);