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
99 /* compare MAC addresses */
100 #define MAC_ADDRESS_EQUAL(A, B) \
101 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
103 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
104 static u16 ad_ticks_per_sec;
105 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
107 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
109 /* ================= main 802.3ad protocol functions ================== */
110 static int ad_lacpdu_send(struct port *port);
111 static int ad_marker_send(struct port *port, struct bond_marker *marker);
112 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
113 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
114 static void ad_tx_machine(struct port *port);
115 static void ad_periodic_machine(struct port *port);
116 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
117 static void ad_agg_selection_logic(struct aggregator *aggregator,
118 bool *update_slave_arr);
119 static void ad_clear_agg(struct aggregator *aggregator);
120 static void ad_initialize_agg(struct aggregator *aggregator);
121 static void ad_initialize_port(struct port *port, int lacp_fast);
122 static void ad_enable_collecting_distributing(struct port *port,
123 bool *update_slave_arr);
124 static void ad_disable_collecting_distributing(struct port *port,
125 bool *update_slave_arr);
126 static void ad_marker_info_received(struct bond_marker *marker_info,
128 static void ad_marker_response_received(struct bond_marker *marker,
130 static void ad_update_actor_keys(struct port *port, bool reset);
133 /* ================= api to bonding and kernel code ================== */
136 * __get_bond_by_port - get the port's bonding struct
137 * @port: the port we're looking at
139 * Return @port's bonding struct, or %NULL if it can't be found.
141 static inline struct bonding *__get_bond_by_port(struct port *port)
143 if (port->slave == NULL)
146 return bond_get_bond_by_slave(port->slave);
150 * __get_first_agg - get the first aggregator in the bond
151 * @bond: the bond we're looking at
153 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
155 * The caller must hold RCU or RTNL lock.
157 static inline struct aggregator *__get_first_agg(struct port *port)
159 struct bonding *bond = __get_bond_by_port(port);
160 struct slave *first_slave;
161 struct aggregator *agg;
163 /* If there's no bond for this port, or bond has no slaves */
168 first_slave = bond_first_slave_rcu(bond);
169 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
176 * __agg_has_partner - see if we have a partner
177 * @agg: the agregator we're looking at
179 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
180 * address for the partner). Return 0 if not.
182 static inline int __agg_has_partner(struct aggregator *agg)
184 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
188 * __disable_port - disable the port's slave
189 * @port: the port we're looking at
191 static inline void __disable_port(struct port *port)
193 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
197 * __enable_port - enable the port's slave, if it's up
198 * @port: the port we're looking at
200 static inline void __enable_port(struct port *port)
202 struct slave *slave = port->slave;
204 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
205 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
209 * __port_is_enabled - check if the port's slave is in active state
210 * @port: the port we're looking at
212 static inline int __port_is_enabled(struct port *port)
214 return bond_is_active_slave(port->slave);
218 * __get_agg_selection_mode - get the aggregator selection mode
219 * @port: the port we're looking at
221 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
223 static inline u32 __get_agg_selection_mode(struct port *port)
225 struct bonding *bond = __get_bond_by_port(port);
228 return BOND_AD_STABLE;
230 return bond->params.ad_select;
234 * __check_agg_selection_timer - check if the selection timer has expired
235 * @port: the port we're looking at
237 static inline int __check_agg_selection_timer(struct port *port)
239 struct bonding *bond = __get_bond_by_port(port);
244 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
248 * __get_link_speed - get a port's speed
249 * @port: the port we're looking at
251 * Return @port's speed in 802.3ad enum format. i.e. one of:
253 * %AD_LINK_SPEED_10MBPS,
254 * %AD_LINK_SPEED_100MBPS,
255 * %AD_LINK_SPEED_1000MBPS,
256 * %AD_LINK_SPEED_2500MBPS,
257 * %AD_LINK_SPEED_10000MBPS
258 * %AD_LINK_SPEED_20000MBPS
259 * %AD_LINK_SPEED_40000MBPS
260 * %AD_LINK_SPEED_56000MBPS
262 static u16 __get_link_speed(struct port *port)
264 struct slave *slave = port->slave;
267 /* this if covers only a special case: when the configuration starts
268 * with link down, it sets the speed to 0.
269 * This is done in spite of the fact that the e100 driver reports 0
270 * to be compatible with MVT in the future.
272 if (slave->link != BOND_LINK_UP)
275 switch (slave->speed) {
277 speed = AD_LINK_SPEED_10MBPS;
281 speed = AD_LINK_SPEED_100MBPS;
285 speed = AD_LINK_SPEED_1000MBPS;
289 speed = AD_LINK_SPEED_2500MBPS;
293 speed = AD_LINK_SPEED_10000MBPS;
297 speed = AD_LINK_SPEED_20000MBPS;
301 speed = AD_LINK_SPEED_40000MBPS;
305 speed = AD_LINK_SPEED_56000MBPS;
309 /* unknown speed value from ethtool. shouldn't happen */
315 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
316 port->actor_port_number, speed);
321 * __get_duplex - get a port's duplex
322 * @port: the port we're looking at
324 * Return @port's duplex in 802.3ad bitmask format. i.e.:
325 * 0x01 if in full duplex
328 static u8 __get_duplex(struct port *port)
330 struct slave *slave = port->slave;
333 /* handling a special case: when the configuration starts with
334 * link down, it sets the duplex to 0.
336 if (slave->link == BOND_LINK_UP) {
337 switch (slave->duplex) {
340 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
341 port->actor_port_number);
346 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
347 port->actor_port_number);
357 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
358 * @timer_type: which timer to operate
359 * @par: timer parameter. see below
361 * If @timer_type is %current_while_timer, @par indicates long/short timer.
362 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
363 * %SLOW_PERIODIC_TIME.
365 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
367 u16 retval = 0; /* to silence the compiler */
369 switch (timer_type) {
370 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
372 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
374 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
376 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
377 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
379 case AD_PERIODIC_TIMER: /* for periodic machine */
380 retval = (par*ad_ticks_per_sec); /* long timeout */
382 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
383 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
385 case AD_WAIT_WHILE_TIMER: /* for selection machine */
386 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
394 /* ================= ad_rx_machine helper functions ================== */
397 * __choose_matched - update a port's matched variable from a received lacpdu
398 * @lacpdu: the lacpdu we've received
399 * @port: the port we're looking at
401 * Update the value of the matched variable, using parameter values from a
402 * newly received lacpdu. Parameter values for the partner carried in the
403 * received PDU are compared with the corresponding operational parameter
404 * values for the actor. Matched is set to TRUE if all of these parameters
405 * match and the PDU parameter partner_state.aggregation has the same value as
406 * actor_oper_port_state.aggregation and lacp will actively maintain the link
407 * in the aggregation. Matched is also set to TRUE if the value of
408 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
409 * an individual link and lacp will actively maintain the link. Otherwise,
410 * matched is set to FALSE. LACP is considered to be actively maintaining the
411 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
412 * the actor's actor_oper_port_state.lacp_activity and the PDU's
413 * partner_state.lacp_activity variables are TRUE.
415 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
416 * used here to implement the language from 802.3ad 43.4.9 that requires
417 * recordPDU to "match" the LACPDU parameters to the stored values.
419 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
421 /* check if all parameters are alike
422 * or this is individual link(aggregation == FALSE)
423 * then update the state machine Matched variable.
425 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
426 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
427 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
428 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
429 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
430 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
431 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
433 port->sm_vars |= AD_PORT_MATCHED;
435 port->sm_vars &= ~AD_PORT_MATCHED;
440 * __record_pdu - record parameters from a received lacpdu
441 * @lacpdu: the lacpdu we've received
442 * @port: the port we're looking at
444 * Record the parameter values for the Actor carried in a received lacpdu as
445 * the current partner operational parameter values and sets
446 * actor_oper_port_state.defaulted to FALSE.
448 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
450 if (lacpdu && port) {
451 struct port_params *partner = &port->partner_oper;
453 __choose_matched(lacpdu, port);
454 /* record the new parameter values for the partner
457 partner->port_number = ntohs(lacpdu->actor_port);
458 partner->port_priority = ntohs(lacpdu->actor_port_priority);
459 partner->system = lacpdu->actor_system;
460 partner->system_priority = ntohs(lacpdu->actor_system_priority);
461 partner->key = ntohs(lacpdu->actor_key);
462 partner->port_state = lacpdu->actor_state;
464 /* set actor_oper_port_state.defaulted to FALSE */
465 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
467 /* set the partner sync. to on if the partner is sync,
468 * and the port is matched
470 if ((port->sm_vars & AD_PORT_MATCHED) &&
471 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
472 partner->port_state |= AD_STATE_SYNCHRONIZATION;
473 pr_debug("%s partner sync=1\n", port->slave->dev->name);
475 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
476 pr_debug("%s partner sync=0\n", port->slave->dev->name);
482 * __record_default - record default parameters
483 * @port: the port we're looking at
485 * This function records the default parameter values for the partner carried
486 * in the Partner Admin parameters as the current partner operational parameter
487 * values and sets actor_oper_port_state.defaulted to TRUE.
489 static void __record_default(struct port *port)
492 /* record the partner admin parameters */
493 memcpy(&port->partner_oper, &port->partner_admin,
494 sizeof(struct port_params));
496 /* set actor_oper_port_state.defaulted to true */
497 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
502 * __update_selected - update a port's Selected variable from a received lacpdu
503 * @lacpdu: the lacpdu we've received
504 * @port: the port we're looking at
506 * Update the value of the selected variable, using parameter values from a
507 * newly received lacpdu. The parameter values for the Actor carried in the
508 * received PDU are compared with the corresponding operational parameter
509 * values for the ports partner. If one or more of the comparisons shows that
510 * the value(s) received in the PDU differ from the current operational values,
511 * then selected is set to FALSE and actor_oper_port_state.synchronization is
512 * set to out_of_sync. Otherwise, selected remains unchanged.
514 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
516 if (lacpdu && port) {
517 const struct port_params *partner = &port->partner_oper;
519 /* check if any parameter is different then
520 * update the state machine selected variable.
522 if (ntohs(lacpdu->actor_port) != partner->port_number ||
523 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
524 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
525 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
526 ntohs(lacpdu->actor_key) != partner->key ||
527 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
528 port->sm_vars &= ~AD_PORT_SELECTED;
534 * __update_default_selected - update a port's Selected variable from Partner
535 * @port: the port we're looking at
537 * This function updates the value of the selected variable, using the partner
538 * administrative parameter values. The administrative values are compared with
539 * the corresponding operational parameter values for the partner. If one or
540 * more of the comparisons shows that the administrative value(s) differ from
541 * the current operational values, then Selected is set to FALSE and
542 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
543 * Selected remains unchanged.
545 static void __update_default_selected(struct port *port)
548 const struct port_params *admin = &port->partner_admin;
549 const struct port_params *oper = &port->partner_oper;
551 /* check if any parameter is different then
552 * update the state machine selected variable.
554 if (admin->port_number != oper->port_number ||
555 admin->port_priority != oper->port_priority ||
556 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
557 admin->system_priority != oper->system_priority ||
558 admin->key != oper->key ||
559 (admin->port_state & AD_STATE_AGGREGATION)
560 != (oper->port_state & AD_STATE_AGGREGATION)) {
561 port->sm_vars &= ~AD_PORT_SELECTED;
567 * __update_ntt - update a port's ntt variable from a received lacpdu
568 * @lacpdu: the lacpdu we've received
569 * @port: the port we're looking at
571 * Updates the value of the ntt variable, using parameter values from a newly
572 * received lacpdu. The parameter values for the partner carried in the
573 * received PDU are compared with the corresponding operational parameter
574 * values for the Actor. If one or more of the comparisons shows that the
575 * value(s) received in the PDU differ from the current operational values,
576 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
578 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
580 /* validate lacpdu and port */
581 if (lacpdu && port) {
582 /* check if any parameter is different then
583 * update the port->ntt.
585 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
586 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
587 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
588 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
589 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
590 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
591 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
592 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
593 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
601 * __agg_ports_are_ready - check if all ports in an aggregator are ready
602 * @aggregator: the aggregator we're looking at
605 static int __agg_ports_are_ready(struct aggregator *aggregator)
611 /* scan all ports in this aggregator to verfy if they are
614 for (port = aggregator->lag_ports;
616 port = port->next_port_in_aggregator) {
617 if (!(port->sm_vars & AD_PORT_READY_N)) {
628 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
629 * @aggregator: the aggregator we're looking at
630 * @val: Should the ports' ready bit be set on or off
633 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
637 for (port = aggregator->lag_ports; port;
638 port = port->next_port_in_aggregator) {
640 port->sm_vars |= AD_PORT_READY;
642 port->sm_vars &= ~AD_PORT_READY;
647 * __get_agg_bandwidth - get the total bandwidth of an aggregator
648 * @aggregator: the aggregator we're looking at
651 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
655 if (aggregator->num_of_ports) {
656 switch (__get_link_speed(aggregator->lag_ports)) {
657 case AD_LINK_SPEED_1MBPS:
658 bandwidth = aggregator->num_of_ports;
660 case AD_LINK_SPEED_10MBPS:
661 bandwidth = aggregator->num_of_ports * 10;
663 case AD_LINK_SPEED_100MBPS:
664 bandwidth = aggregator->num_of_ports * 100;
666 case AD_LINK_SPEED_1000MBPS:
667 bandwidth = aggregator->num_of_ports * 1000;
669 case AD_LINK_SPEED_2500MBPS:
670 bandwidth = aggregator->num_of_ports * 2500;
672 case AD_LINK_SPEED_10000MBPS:
673 bandwidth = aggregator->num_of_ports * 10000;
675 case AD_LINK_SPEED_20000MBPS:
676 bandwidth = aggregator->num_of_ports * 20000;
678 case AD_LINK_SPEED_40000MBPS:
679 bandwidth = aggregator->num_of_ports * 40000;
681 case AD_LINK_SPEED_56000MBPS:
682 bandwidth = aggregator->num_of_ports * 56000;
685 bandwidth = 0; /* to silence the compiler */
692 * __get_active_agg - get the current active aggregator
693 * @aggregator: the aggregator we're looking at
695 * Caller must hold RCU lock.
697 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
699 struct bonding *bond = aggregator->slave->bond;
700 struct list_head *iter;
703 bond_for_each_slave_rcu(bond, slave, iter)
704 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
705 return &(SLAVE_AD_INFO(slave)->aggregator);
711 * __update_lacpdu_from_port - update a port's lacpdu fields
712 * @port: the port we're looking at
714 static inline void __update_lacpdu_from_port(struct port *port)
716 struct lacpdu *lacpdu = &port->lacpdu;
717 const struct port_params *partner = &port->partner_oper;
719 /* update current actual Actor parameters
720 * lacpdu->subtype initialized
721 * lacpdu->version_number initialized
722 * lacpdu->tlv_type_actor_info initialized
723 * lacpdu->actor_information_length initialized
726 lacpdu->actor_system_priority = htons(port->actor_system_priority);
727 lacpdu->actor_system = port->actor_system;
728 lacpdu->actor_key = htons(port->actor_oper_port_key);
729 lacpdu->actor_port_priority = htons(port->actor_port_priority);
730 lacpdu->actor_port = htons(port->actor_port_number);
731 lacpdu->actor_state = port->actor_oper_port_state;
732 pr_debug("update lacpdu: %s, actor port state %x\n",
733 port->slave->dev->name, port->actor_oper_port_state);
735 /* lacpdu->reserved_3_1 initialized
736 * lacpdu->tlv_type_partner_info initialized
737 * lacpdu->partner_information_length initialized
740 lacpdu->partner_system_priority = htons(partner->system_priority);
741 lacpdu->partner_system = partner->system;
742 lacpdu->partner_key = htons(partner->key);
743 lacpdu->partner_port_priority = htons(partner->port_priority);
744 lacpdu->partner_port = htons(partner->port_number);
745 lacpdu->partner_state = partner->port_state;
747 /* lacpdu->reserved_3_2 initialized
748 * lacpdu->tlv_type_collector_info initialized
749 * lacpdu->collector_information_length initialized
750 * collector_max_delay initialized
751 * reserved_12[12] initialized
752 * tlv_type_terminator initialized
753 * terminator_length initialized
754 * reserved_50[50] initialized
758 /* ================= main 802.3ad protocol code ========================= */
761 * ad_lacpdu_send - send out a lacpdu packet on a given port
762 * @port: the port we're looking at
764 * Returns: 0 on success
767 static int ad_lacpdu_send(struct port *port)
769 struct slave *slave = port->slave;
771 struct lacpdu_header *lacpdu_header;
772 int length = sizeof(struct lacpdu_header);
774 skb = dev_alloc_skb(length);
778 skb->dev = slave->dev;
779 skb_reset_mac_header(skb);
780 skb->network_header = skb->mac_header + ETH_HLEN;
781 skb->protocol = PKT_TYPE_LACPDU;
782 skb->priority = TC_PRIO_CONTROL;
784 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
786 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
787 /* Note: source address is set to be the member's PERMANENT address,
788 * because we use it to identify loopback lacpdus in receive.
790 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
791 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
793 lacpdu_header->lacpdu = port->lacpdu;
801 * ad_marker_send - send marker information/response on a given port
802 * @port: the port we're looking at
803 * @marker: marker data to send
805 * Returns: 0 on success
808 static int ad_marker_send(struct port *port, struct bond_marker *marker)
810 struct slave *slave = port->slave;
812 struct bond_marker_header *marker_header;
813 int length = sizeof(struct bond_marker_header);
815 skb = dev_alloc_skb(length + 16);
819 skb_reserve(skb, 16);
821 skb->dev = slave->dev;
822 skb_reset_mac_header(skb);
823 skb->network_header = skb->mac_header + ETH_HLEN;
824 skb->protocol = PKT_TYPE_LACPDU;
826 marker_header = (struct bond_marker_header *)skb_put(skb, length);
828 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
829 /* Note: source address is set to be the member's PERMANENT address,
830 * because we use it to identify loopback MARKERs in receive.
832 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
833 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
835 marker_header->marker = *marker;
843 * ad_mux_machine - handle a port's mux state machine
844 * @port: the port we're looking at
845 * @update_slave_arr: Does slave array need update?
847 static void ad_mux_machine(struct port *port, bool *update_slave_arr)
849 mux_states_t last_state;
851 /* keep current State Machine state to compare later if it was
854 last_state = port->sm_mux_state;
856 if (port->sm_vars & AD_PORT_BEGIN) {
857 port->sm_mux_state = AD_MUX_DETACHED;
859 switch (port->sm_mux_state) {
860 case AD_MUX_DETACHED:
861 if ((port->sm_vars & AD_PORT_SELECTED)
862 || (port->sm_vars & AD_PORT_STANDBY))
863 /* if SELECTED or STANDBY */
864 port->sm_mux_state = AD_MUX_WAITING;
867 /* if SELECTED == FALSE return to DETACH state */
868 if (!(port->sm_vars & AD_PORT_SELECTED)) {
869 port->sm_vars &= ~AD_PORT_READY_N;
870 /* in order to withhold the Selection Logic to
871 * check all ports READY_N value every callback
872 * cycle to update ready variable, we check
873 * READY_N and update READY here
875 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
876 port->sm_mux_state = AD_MUX_DETACHED;
880 /* check if the wait_while_timer expired */
881 if (port->sm_mux_timer_counter
882 && !(--port->sm_mux_timer_counter))
883 port->sm_vars |= AD_PORT_READY_N;
885 /* in order to withhold the selection logic to check
886 * all ports READY_N value every callback cycle to
887 * update ready variable, we check READY_N and update
890 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
892 /* if the wait_while_timer expired, and the port is
893 * in READY state, move to ATTACHED state
895 if ((port->sm_vars & AD_PORT_READY)
896 && !port->sm_mux_timer_counter)
897 port->sm_mux_state = AD_MUX_ATTACHED;
899 case AD_MUX_ATTACHED:
900 /* check also if agg_select_timer expired (so the
901 * edable port will take place only after this timer)
903 if ((port->sm_vars & AD_PORT_SELECTED) &&
904 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
905 !__check_agg_selection_timer(port)) {
906 if (port->aggregator->is_active)
908 AD_MUX_COLLECTING_DISTRIBUTING;
909 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
910 (port->sm_vars & AD_PORT_STANDBY)) {
911 /* if UNSELECTED or STANDBY */
912 port->sm_vars &= ~AD_PORT_READY_N;
913 /* in order to withhold the selection logic to
914 * check all ports READY_N value every callback
915 * cycle to update ready variable, we check
916 * READY_N and update READY here
918 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
919 port->sm_mux_state = AD_MUX_DETACHED;
920 } else if (port->aggregator->is_active) {
921 port->actor_oper_port_state |=
922 AD_STATE_SYNCHRONIZATION;
925 case AD_MUX_COLLECTING_DISTRIBUTING:
926 if (!(port->sm_vars & AD_PORT_SELECTED) ||
927 (port->sm_vars & AD_PORT_STANDBY) ||
928 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
929 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
930 port->sm_mux_state = AD_MUX_ATTACHED;
932 /* if port state hasn't changed make
933 * sure that a collecting distributing
934 * port in an active aggregator is enabled
936 if (port->aggregator &&
937 port->aggregator->is_active &&
938 !__port_is_enabled(port)) {
949 /* check if the state machine was changed */
950 if (port->sm_mux_state != last_state) {
951 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
952 port->actor_port_number,
953 port->slave->dev->name,
956 switch (port->sm_mux_state) {
957 case AD_MUX_DETACHED:
958 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
959 ad_disable_collecting_distributing(port,
961 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
962 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
966 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
968 case AD_MUX_ATTACHED:
969 if (port->aggregator->is_active)
970 port->actor_oper_port_state |=
971 AD_STATE_SYNCHRONIZATION;
973 port->actor_oper_port_state &=
974 ~AD_STATE_SYNCHRONIZATION;
975 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
976 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
977 ad_disable_collecting_distributing(port,
981 case AD_MUX_COLLECTING_DISTRIBUTING:
982 port->actor_oper_port_state |= AD_STATE_COLLECTING;
983 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
984 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
985 ad_enable_collecting_distributing(port,
996 * ad_rx_machine - handle a port's rx State Machine
997 * @lacpdu: the lacpdu we've received
998 * @port: the port we're looking at
1000 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1001 * CURRENT. If timer expired set the state machine in the proper state.
1002 * In other cases, this function checks if we need to switch to other state.
1004 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1006 rx_states_t last_state;
1008 /* keep current State Machine state to compare later if it was
1011 last_state = port->sm_rx_state;
1013 /* check if state machine should change state */
1015 /* first, check if port was reinitialized */
1016 if (port->sm_vars & AD_PORT_BEGIN) {
1017 port->sm_rx_state = AD_RX_INITIALIZE;
1018 port->sm_vars |= AD_PORT_CHURNED;
1019 /* check if port is not enabled */
1020 } else if (!(port->sm_vars & AD_PORT_BEGIN)
1021 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1022 port->sm_rx_state = AD_RX_PORT_DISABLED;
1023 /* check if new lacpdu arrived */
1024 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1025 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1026 (port->sm_rx_state == AD_RX_CURRENT))) {
1027 if (port->sm_rx_state != AD_RX_CURRENT)
1028 port->sm_vars |= AD_PORT_CHURNED;
1029 port->sm_rx_timer_counter = 0;
1030 port->sm_rx_state = AD_RX_CURRENT;
1032 /* if timer is on, and if it is expired */
1033 if (port->sm_rx_timer_counter &&
1034 !(--port->sm_rx_timer_counter)) {
1035 switch (port->sm_rx_state) {
1037 port->sm_rx_state = AD_RX_DEFAULTED;
1040 port->sm_rx_state = AD_RX_EXPIRED;
1046 /* if no lacpdu arrived and no timer is on */
1047 switch (port->sm_rx_state) {
1048 case AD_RX_PORT_DISABLED:
1049 if (port->sm_vars & AD_PORT_MOVED)
1050 port->sm_rx_state = AD_RX_INITIALIZE;
1051 else if (port->is_enabled
1053 & AD_PORT_LACP_ENABLED))
1054 port->sm_rx_state = AD_RX_EXPIRED;
1055 else if (port->is_enabled
1057 & AD_PORT_LACP_ENABLED) == 0))
1058 port->sm_rx_state = AD_RX_LACP_DISABLED;
1067 /* check if the State machine was changed or new lacpdu arrived */
1068 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1069 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1070 port->actor_port_number,
1071 port->slave->dev->name,
1074 switch (port->sm_rx_state) {
1075 case AD_RX_INITIALIZE:
1076 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1077 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1079 port->sm_vars |= AD_PORT_LACP_ENABLED;
1080 port->sm_vars &= ~AD_PORT_SELECTED;
1081 __record_default(port);
1082 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1083 port->sm_vars &= ~AD_PORT_MOVED;
1084 port->sm_rx_state = AD_RX_PORT_DISABLED;
1087 case AD_RX_PORT_DISABLED:
1088 port->sm_vars &= ~AD_PORT_MATCHED;
1090 case AD_RX_LACP_DISABLED:
1091 port->sm_vars &= ~AD_PORT_SELECTED;
1092 __record_default(port);
1093 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1094 port->sm_vars |= AD_PORT_MATCHED;
1095 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1098 /* Reset of the Synchronization flag (Standard 43.4.12)
1099 * This reset cause to disable this port in the
1100 * COLLECTING_DISTRIBUTING state of the mux machine in
1101 * case of EXPIRED even if LINK_DOWN didn't arrive for
1104 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1105 port->sm_vars &= ~AD_PORT_MATCHED;
1106 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
1107 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1108 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1109 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1110 port->sm_vars |= AD_PORT_CHURNED;
1112 case AD_RX_DEFAULTED:
1113 __update_default_selected(port);
1114 __record_default(port);
1115 port->sm_vars |= AD_PORT_MATCHED;
1116 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1119 /* detect loopback situation */
1120 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1121 &(port->actor_system))) {
1122 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
1123 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1124 port->slave->dev->name);
1127 __update_selected(lacpdu, port);
1128 __update_ntt(lacpdu, port);
1129 __record_pdu(lacpdu, port);
1130 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1131 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1140 * ad_churn_machine - handle port churn's state machine
1141 * @port: the port we're looking at
1144 static void ad_churn_machine(struct port *port)
1146 if (port->sm_vars & AD_PORT_CHURNED) {
1147 port->sm_vars &= ~AD_PORT_CHURNED;
1148 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1149 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1150 port->sm_churn_actor_timer_counter =
1151 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1152 port->sm_churn_partner_timer_counter =
1153 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1156 if (port->sm_churn_actor_timer_counter &&
1157 !(--port->sm_churn_actor_timer_counter) &&
1158 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1159 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1160 port->sm_churn_actor_state = AD_NO_CHURN;
1162 port->churn_actor_count++;
1163 port->sm_churn_actor_state = AD_CHURN;
1166 if (port->sm_churn_partner_timer_counter &&
1167 !(--port->sm_churn_partner_timer_counter) &&
1168 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1169 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1170 port->sm_churn_partner_state = AD_NO_CHURN;
1172 port->churn_partner_count++;
1173 port->sm_churn_partner_state = AD_CHURN;
1179 * ad_tx_machine - handle a port's tx state machine
1180 * @port: the port we're looking at
1182 static void ad_tx_machine(struct port *port)
1184 /* check if tx timer expired, to verify that we do not send more than
1185 * 3 packets per second
1187 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1188 /* check if there is something to send */
1189 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1190 __update_lacpdu_from_port(port);
1192 if (ad_lacpdu_send(port) >= 0) {
1193 pr_debug("Sent LACPDU on port %d\n",
1194 port->actor_port_number);
1196 /* mark ntt as false, so it will not be sent
1197 * again until demanded
1202 /* restart tx timer(to verify that we will not exceed
1203 * AD_MAX_TX_IN_SECOND
1205 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1210 * ad_periodic_machine - handle a port's periodic state machine
1211 * @port: the port we're looking at
1213 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1215 static void ad_periodic_machine(struct port *port)
1217 periodic_states_t last_state;
1219 /* keep current state machine state to compare later if it was changed */
1220 last_state = port->sm_periodic_state;
1222 /* check if port was reinitialized */
1223 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1224 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1226 port->sm_periodic_state = AD_NO_PERIODIC;
1228 /* check if state machine should change state */
1229 else if (port->sm_periodic_timer_counter) {
1230 /* check if periodic state machine expired */
1231 if (!(--port->sm_periodic_timer_counter)) {
1232 /* if expired then do tx */
1233 port->sm_periodic_state = AD_PERIODIC_TX;
1235 /* If not expired, check if there is some new timeout
1236 * parameter from the partner state
1238 switch (port->sm_periodic_state) {
1239 case AD_FAST_PERIODIC:
1240 if (!(port->partner_oper.port_state
1241 & AD_STATE_LACP_TIMEOUT))
1242 port->sm_periodic_state = AD_SLOW_PERIODIC;
1244 case AD_SLOW_PERIODIC:
1245 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1246 port->sm_periodic_timer_counter = 0;
1247 port->sm_periodic_state = AD_PERIODIC_TX;
1255 switch (port->sm_periodic_state) {
1256 case AD_NO_PERIODIC:
1257 port->sm_periodic_state = AD_FAST_PERIODIC;
1259 case AD_PERIODIC_TX:
1260 if (!(port->partner_oper.port_state &
1261 AD_STATE_LACP_TIMEOUT))
1262 port->sm_periodic_state = AD_SLOW_PERIODIC;
1264 port->sm_periodic_state = AD_FAST_PERIODIC;
1271 /* check if the state machine was changed */
1272 if (port->sm_periodic_state != last_state) {
1273 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1274 port->actor_port_number, last_state,
1275 port->sm_periodic_state);
1276 switch (port->sm_periodic_state) {
1277 case AD_NO_PERIODIC:
1278 port->sm_periodic_timer_counter = 0;
1280 case AD_FAST_PERIODIC:
1281 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1282 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1284 case AD_SLOW_PERIODIC:
1285 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1286 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1288 case AD_PERIODIC_TX:
1298 * ad_port_selection_logic - select aggregation groups
1299 * @port: the port we're looking at
1300 * @update_slave_arr: Does slave array need update?
1302 * Select aggregation groups, and assign each port for it's aggregetor. The
1303 * selection logic is called in the inititalization (after all the handshkes),
1304 * and after every lacpdu receive (if selected is off).
1306 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1308 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1309 struct port *last_port = NULL, *curr_port;
1310 struct list_head *iter;
1311 struct bonding *bond;
1312 struct slave *slave;
1315 /* if the port is already Selected, do nothing */
1316 if (port->sm_vars & AD_PORT_SELECTED)
1319 bond = __get_bond_by_port(port);
1321 /* if the port is connected to other aggregator, detach it */
1322 if (port->aggregator) {
1323 /* detach the port from its former aggregator */
1324 temp_aggregator = port->aggregator;
1325 for (curr_port = temp_aggregator->lag_ports; curr_port;
1326 last_port = curr_port,
1327 curr_port = curr_port->next_port_in_aggregator) {
1328 if (curr_port == port) {
1329 temp_aggregator->num_of_ports--;
1330 /* if it is the first port attached to the
1334 temp_aggregator->lag_ports =
1335 port->next_port_in_aggregator;
1337 /* not the first port attached to the
1340 last_port->next_port_in_aggregator =
1341 port->next_port_in_aggregator;
1344 /* clear the port's relations to this
1347 port->aggregator = NULL;
1348 port->next_port_in_aggregator = NULL;
1349 port->actor_port_aggregator_identifier = 0;
1351 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1352 port->actor_port_number,
1353 temp_aggregator->aggregator_identifier);
1354 /* if the aggregator is empty, clear its
1355 * parameters, and set it ready to be attached
1357 if (!temp_aggregator->lag_ports)
1358 ad_clear_agg(temp_aggregator);
1363 /* meaning: the port was related to an aggregator
1364 * but was not on the aggregator port list
1366 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1367 port->slave->bond->dev->name,
1368 port->actor_port_number,
1369 port->slave->dev->name,
1370 port->aggregator->aggregator_identifier);
1373 /* search on all aggregators for a suitable aggregator for this port */
1374 bond_for_each_slave(bond, slave, iter) {
1375 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1377 /* keep a free aggregator for later use(if needed) */
1378 if (!aggregator->lag_ports) {
1379 if (!free_aggregator)
1380 free_aggregator = aggregator;
1383 /* check if current aggregator suits us */
1384 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1385 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1386 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1387 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1389 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1390 !aggregator->is_individual) /* but is not individual OR */
1393 /* attach to the founded aggregator */
1394 port->aggregator = aggregator;
1395 port->actor_port_aggregator_identifier =
1396 port->aggregator->aggregator_identifier;
1397 port->next_port_in_aggregator = aggregator->lag_ports;
1398 port->aggregator->num_of_ports++;
1399 aggregator->lag_ports = port;
1400 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1401 port->actor_port_number,
1402 port->aggregator->aggregator_identifier);
1404 /* mark this port as selected */
1405 port->sm_vars |= AD_PORT_SELECTED;
1411 /* the port couldn't find an aggregator - attach it to a new
1415 if (free_aggregator) {
1416 /* assign port a new aggregator */
1417 port->aggregator = free_aggregator;
1418 port->actor_port_aggregator_identifier =
1419 port->aggregator->aggregator_identifier;
1421 /* update the new aggregator's parameters
1422 * if port was responsed from the end-user
1424 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1425 /* if port is full duplex */
1426 port->aggregator->is_individual = false;
1428 port->aggregator->is_individual = true;
1430 port->aggregator->actor_admin_aggregator_key =
1431 port->actor_admin_port_key;
1432 port->aggregator->actor_oper_aggregator_key =
1433 port->actor_oper_port_key;
1434 port->aggregator->partner_system =
1435 port->partner_oper.system;
1436 port->aggregator->partner_system_priority =
1437 port->partner_oper.system_priority;
1438 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1439 port->aggregator->receive_state = 1;
1440 port->aggregator->transmit_state = 1;
1441 port->aggregator->lag_ports = port;
1442 port->aggregator->num_of_ports++;
1444 /* mark this port as selected */
1445 port->sm_vars |= AD_PORT_SELECTED;
1447 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1448 port->actor_port_number,
1449 port->aggregator->aggregator_identifier);
1451 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1452 port->actor_port_number, port->slave->dev->name);
1455 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1456 * in all aggregator's ports, else set ready=FALSE in all
1457 * aggregator's ports
1459 __set_agg_ports_ready(port->aggregator,
1460 __agg_ports_are_ready(port->aggregator));
1462 aggregator = __get_first_agg(port);
1463 ad_agg_selection_logic(aggregator, update_slave_arr);
1465 if (!port->aggregator->is_active)
1466 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1469 /* Decide if "agg" is a better choice for the new active aggregator that
1470 * the current best, according to the ad_select policy.
1472 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1473 struct aggregator *curr)
1475 /* 0. If no best, select current.
1477 * 1. If the current agg is not individual, and the best is
1478 * individual, select current.
1480 * 2. If current agg is individual and the best is not, keep best.
1482 * 3. Therefore, current and best are both individual or both not
1485 * 3a. If current agg partner replied, and best agg partner did not,
1488 * 3b. If current agg partner did not reply and best agg partner
1489 * did reply, keep best.
1491 * 4. Therefore, current and best both have partner replies or
1492 * both do not, so perform selection policy:
1494 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1495 * select by bandwidth.
1497 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1502 if (!curr->is_individual && best->is_individual)
1505 if (curr->is_individual && !best->is_individual)
1508 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1511 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1514 switch (__get_agg_selection_mode(curr->lag_ports)) {
1516 if (curr->num_of_ports > best->num_of_ports)
1519 if (curr->num_of_ports < best->num_of_ports)
1523 case BOND_AD_STABLE:
1524 case BOND_AD_BANDWIDTH:
1525 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1531 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1532 curr->slave->bond->dev->name,
1533 __get_agg_selection_mode(curr->lag_ports));
1540 static int agg_device_up(const struct aggregator *agg)
1542 struct port *port = agg->lag_ports;
1547 return netif_running(port->slave->dev) &&
1548 netif_carrier_ok(port->slave->dev);
1552 * ad_agg_selection_logic - select an aggregation group for a team
1553 * @aggregator: the aggregator we're looking at
1554 * @update_slave_arr: Does slave array need update?
1556 * It is assumed that only one aggregator may be selected for a team.
1558 * The logic of this function is to select the aggregator according to
1559 * the ad_select policy:
1561 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1562 * it, and to reselect the active aggregator only if the previous
1563 * aggregator has no more ports related to it.
1565 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1566 * bandwidth, and reselect whenever a link state change takes place or the
1567 * set of slaves in the bond changes.
1569 * BOND_AD_COUNT: select the aggregator with largest number of ports
1570 * (slaves), and reselect whenever a link state change takes place or the
1571 * set of slaves in the bond changes.
1573 * FIXME: this function MUST be called with the first agg in the bond, or
1574 * __get_active_agg() won't work correctly. This function should be better
1575 * called with the bond itself, and retrieve the first agg from it.
1577 static void ad_agg_selection_logic(struct aggregator *agg,
1578 bool *update_slave_arr)
1580 struct aggregator *best, *active, *origin;
1581 struct bonding *bond = agg->slave->bond;
1582 struct list_head *iter;
1583 struct slave *slave;
1588 active = __get_active_agg(agg);
1589 best = (active && agg_device_up(active)) ? active : NULL;
1591 bond_for_each_slave_rcu(bond, slave, iter) {
1592 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1596 if (agg->num_of_ports && agg_device_up(agg))
1597 best = ad_agg_selection_test(best, agg);
1601 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1602 /* For the STABLE policy, don't replace the old active
1603 * aggregator if it's still active (it has an answering
1604 * partner) or if both the best and active don't have an
1605 * answering partner.
1607 if (active && active->lag_ports &&
1608 active->lag_ports->is_enabled &&
1609 (__agg_has_partner(active) ||
1610 (!__agg_has_partner(active) &&
1611 !__agg_has_partner(best)))) {
1612 if (!(!active->actor_oper_aggregator_key &&
1613 best->actor_oper_aggregator_key)) {
1615 active->is_active = 1;
1620 if (best && (best == active)) {
1622 active->is_active = 1;
1625 /* if there is new best aggregator, activate it */
1627 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1628 best->aggregator_identifier, best->num_of_ports,
1629 best->actor_oper_aggregator_key,
1630 best->partner_oper_aggregator_key,
1631 best->is_individual, best->is_active);
1632 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1633 best->lag_ports, best->slave,
1634 best->slave ? best->slave->dev->name : "NULL");
1636 bond_for_each_slave_rcu(bond, slave, iter) {
1637 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1639 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1640 agg->aggregator_identifier, agg->num_of_ports,
1641 agg->actor_oper_aggregator_key,
1642 agg->partner_oper_aggregator_key,
1643 agg->is_individual, agg->is_active);
1646 /* check if any partner replys */
1647 if (best->is_individual) {
1648 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1650 best->slave->bond->dev->name : "NULL");
1653 best->is_active = 1;
1654 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1655 best->aggregator_identifier);
1656 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1657 best->aggregator_identifier, best->num_of_ports,
1658 best->actor_oper_aggregator_key,
1659 best->partner_oper_aggregator_key,
1660 best->is_individual, best->is_active);
1662 /* disable the ports that were related to the former
1666 for (port = active->lag_ports; port;
1667 port = port->next_port_in_aggregator) {
1668 __disable_port(port);
1671 /* Slave array needs update. */
1672 *update_slave_arr = true;
1675 /* if the selected aggregator is of join individuals
1676 * (partner_system is NULL), enable their ports
1678 active = __get_active_agg(origin);
1681 if (!__agg_has_partner(active)) {
1682 for (port = active->lag_ports; port;
1683 port = port->next_port_in_aggregator) {
1684 __enable_port(port);
1691 bond_3ad_set_carrier(bond);
1695 * ad_clear_agg - clear a given aggregator's parameters
1696 * @aggregator: the aggregator we're looking at
1698 static void ad_clear_agg(struct aggregator *aggregator)
1701 aggregator->is_individual = false;
1702 aggregator->actor_admin_aggregator_key = 0;
1703 aggregator->actor_oper_aggregator_key = 0;
1704 aggregator->partner_system = null_mac_addr;
1705 aggregator->partner_system_priority = 0;
1706 aggregator->partner_oper_aggregator_key = 0;
1707 aggregator->receive_state = 0;
1708 aggregator->transmit_state = 0;
1709 aggregator->lag_ports = NULL;
1710 aggregator->is_active = 0;
1711 aggregator->num_of_ports = 0;
1712 pr_debug("LAG %d was cleared\n",
1713 aggregator->aggregator_identifier);
1718 * ad_initialize_agg - initialize a given aggregator's parameters
1719 * @aggregator: the aggregator we're looking at
1721 static void ad_initialize_agg(struct aggregator *aggregator)
1724 ad_clear_agg(aggregator);
1726 aggregator->aggregator_mac_address = null_mac_addr;
1727 aggregator->aggregator_identifier = 0;
1728 aggregator->slave = NULL;
1733 * ad_initialize_port - initialize a given port's parameters
1734 * @aggregator: the aggregator we're looking at
1735 * @lacp_fast: boolean. whether fast periodic should be used
1737 static void ad_initialize_port(struct port *port, int lacp_fast)
1739 static const struct port_params tmpl = {
1740 .system_priority = 0xffff,
1743 .port_priority = 0xff,
1746 static const struct lacpdu lacpdu = {
1748 .version_number = 0x01,
1749 .tlv_type_actor_info = 0x01,
1750 .actor_information_length = 0x14,
1751 .tlv_type_partner_info = 0x02,
1752 .partner_information_length = 0x14,
1753 .tlv_type_collector_info = 0x03,
1754 .collector_information_length = 0x10,
1755 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1759 port->actor_port_priority = 0xff;
1760 port->actor_port_aggregator_identifier = 0;
1762 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1763 AD_STATE_LACP_ACTIVITY;
1764 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1765 AD_STATE_LACP_ACTIVITY;
1768 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1770 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1771 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1773 port->is_enabled = true;
1774 /* private parameters */
1775 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1776 port->sm_rx_state = 0;
1777 port->sm_rx_timer_counter = 0;
1778 port->sm_periodic_state = 0;
1779 port->sm_periodic_timer_counter = 0;
1780 port->sm_mux_state = 0;
1781 port->sm_mux_timer_counter = 0;
1782 port->sm_tx_state = 0;
1783 port->aggregator = NULL;
1784 port->next_port_in_aggregator = NULL;
1785 port->transaction_id = 0;
1787 port->sm_churn_actor_timer_counter = 0;
1788 port->sm_churn_actor_state = 0;
1789 port->churn_actor_count = 0;
1790 port->sm_churn_partner_timer_counter = 0;
1791 port->sm_churn_partner_state = 0;
1792 port->churn_partner_count = 0;
1794 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1799 * ad_enable_collecting_distributing - enable a port's transmit/receive
1800 * @port: the port we're looking at
1801 * @update_slave_arr: Does slave array need update?
1803 * Enable @port if it's in an active aggregator
1805 static void ad_enable_collecting_distributing(struct port *port,
1806 bool *update_slave_arr)
1808 if (port->aggregator->is_active) {
1809 pr_debug("Enabling port %d(LAG %d)\n",
1810 port->actor_port_number,
1811 port->aggregator->aggregator_identifier);
1812 __enable_port(port);
1813 /* Slave array needs update */
1814 *update_slave_arr = true;
1819 * ad_disable_collecting_distributing - disable a port's transmit/receive
1820 * @port: the port we're looking at
1821 * @update_slave_arr: Does slave array need update?
1823 static void ad_disable_collecting_distributing(struct port *port,
1824 bool *update_slave_arr)
1826 if (port->aggregator &&
1827 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1828 &(null_mac_addr))) {
1829 pr_debug("Disabling port %d(LAG %d)\n",
1830 port->actor_port_number,
1831 port->aggregator->aggregator_identifier);
1832 __disable_port(port);
1833 /* Slave array needs an update */
1834 *update_slave_arr = true;
1839 * ad_marker_info_received - handle receive of a Marker information frame
1840 * @marker_info: Marker info received
1841 * @port: the port we're looking at
1843 static void ad_marker_info_received(struct bond_marker *marker_info,
1846 struct bond_marker marker;
1848 /* copy the received marker data to the response marker */
1849 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1850 /* change the marker subtype to marker response */
1851 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1853 /* send the marker response */
1854 if (ad_marker_send(port, &marker) >= 0) {
1855 pr_debug("Sent Marker Response on port %d\n",
1856 port->actor_port_number);
1861 * ad_marker_response_received - handle receive of a marker response frame
1862 * @marker: marker PDU received
1863 * @port: the port we're looking at
1865 * This function does nothing since we decided not to implement send and handle
1866 * response for marker PDU's, in this stage, but only to respond to marker
1869 static void ad_marker_response_received(struct bond_marker *marker,
1872 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1875 /* ========= AD exported functions to the main bonding code ========= */
1877 /* Check aggregators status in team every T seconds */
1878 #define AD_AGGREGATOR_SELECTION_TIMER 8
1881 * bond_3ad_initiate_agg_selection - initate aggregator selection
1882 * @bond: bonding struct
1884 * Set the aggregation selection timer, to initiate an agg selection in
1885 * the very near future. Called during first initialization, and during
1886 * any down to up transitions of the bond.
1888 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1890 BOND_AD_INFO(bond).agg_select_timer = timeout;
1894 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1895 * @bond: bonding struct to work on
1896 * @tick_resolution: tick duration (millisecond resolution)
1898 * Can be called only after the mac address of the bond is set.
1900 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1902 /* check that the bond is not initialized yet */
1903 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1904 bond->dev->dev_addr)) {
1906 BOND_AD_INFO(bond).aggregator_identifier = 0;
1908 BOND_AD_INFO(bond).system.sys_priority =
1909 bond->params.ad_actor_sys_prio;
1910 if (is_zero_ether_addr(bond->params.ad_actor_system))
1911 BOND_AD_INFO(bond).system.sys_mac_addr =
1912 *((struct mac_addr *)bond->dev->dev_addr);
1914 BOND_AD_INFO(bond).system.sys_mac_addr =
1915 *((struct mac_addr *)bond->params.ad_actor_system);
1917 /* initialize how many times this module is called in one
1918 * second (should be about every 100ms)
1920 ad_ticks_per_sec = tick_resolution;
1922 bond_3ad_initiate_agg_selection(bond,
1923 AD_AGGREGATOR_SELECTION_TIMER *
1929 * bond_3ad_bind_slave - initialize a slave's port
1930 * @slave: slave struct to work on
1932 * Returns: 0 on success
1935 void bond_3ad_bind_slave(struct slave *slave)
1937 struct bonding *bond = bond_get_bond_by_slave(slave);
1939 struct aggregator *aggregator;
1941 /* check that the slave has not been initialized yet. */
1942 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1944 /* port initialization */
1945 port = &(SLAVE_AD_INFO(slave)->port);
1947 ad_initialize_port(port, bond->params.lacp_fast);
1949 port->slave = slave;
1950 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
1951 /* key is determined according to the link speed, duplex and
1954 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
1955 ad_update_actor_keys(port, false);
1956 /* actor system is the bond's system */
1957 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1958 port->actor_system_priority =
1959 BOND_AD_INFO(bond).system.sys_priority;
1960 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1961 * lacpdu's are sent in one second)
1963 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1965 __disable_port(port);
1967 /* aggregator initialization */
1968 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1970 ad_initialize_agg(aggregator);
1972 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1973 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1974 aggregator->slave = slave;
1975 aggregator->is_active = 0;
1976 aggregator->num_of_ports = 0;
1981 * bond_3ad_unbind_slave - deinitialize a slave's port
1982 * @slave: slave struct to work on
1984 * Search for the aggregator that is related to this port, remove the
1985 * aggregator and assign another aggregator for other port related to it
1986 * (if any), and remove the port.
1988 void bond_3ad_unbind_slave(struct slave *slave)
1990 struct port *port, *prev_port, *temp_port;
1991 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1992 int select_new_active_agg = 0;
1993 struct bonding *bond = slave->bond;
1994 struct slave *slave_iter;
1995 struct list_head *iter;
1996 bool dummy_slave_update; /* Ignore this value as caller updates array */
1998 /* Sync against bond_3ad_state_machine_handler() */
1999 spin_lock_bh(&bond->mode_lock);
2000 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2001 port = &(SLAVE_AD_INFO(slave)->port);
2003 /* if slave is null, the whole port is not initialized */
2005 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2010 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2011 aggregator->aggregator_identifier);
2013 /* Tell the partner that this port is not suitable for aggregation */
2014 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2015 __update_lacpdu_from_port(port);
2016 ad_lacpdu_send(port);
2018 /* check if this aggregator is occupied */
2019 if (aggregator->lag_ports) {
2020 /* check if there are other ports related to this aggregator
2021 * except the port related to this slave(thats ensure us that
2022 * there is a reason to search for new aggregator, and that we
2025 if ((aggregator->lag_ports != port) ||
2026 (aggregator->lag_ports->next_port_in_aggregator)) {
2027 /* find new aggregator for the related port(s) */
2028 bond_for_each_slave(bond, slave_iter, iter) {
2029 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2030 /* if the new aggregator is empty, or it is
2031 * connected to our port only
2033 if (!new_aggregator->lag_ports ||
2034 ((new_aggregator->lag_ports == port) &&
2035 !new_aggregator->lag_ports->next_port_in_aggregator))
2039 new_aggregator = NULL;
2041 /* if new aggregator found, copy the aggregator's
2042 * parameters and connect the related lag_ports to the
2045 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2046 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2047 aggregator->aggregator_identifier,
2048 new_aggregator->aggregator_identifier);
2050 if ((new_aggregator->lag_ports == port) &&
2051 new_aggregator->is_active) {
2052 netdev_info(bond->dev, "Removing an active aggregator\n");
2053 select_new_active_agg = 1;
2056 new_aggregator->is_individual = aggregator->is_individual;
2057 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2058 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2059 new_aggregator->partner_system = aggregator->partner_system;
2060 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2061 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2062 new_aggregator->receive_state = aggregator->receive_state;
2063 new_aggregator->transmit_state = aggregator->transmit_state;
2064 new_aggregator->lag_ports = aggregator->lag_ports;
2065 new_aggregator->is_active = aggregator->is_active;
2066 new_aggregator->num_of_ports = aggregator->num_of_ports;
2068 /* update the information that is written on
2069 * the ports about the aggregator
2071 for (temp_port = aggregator->lag_ports; temp_port;
2072 temp_port = temp_port->next_port_in_aggregator) {
2073 temp_port->aggregator = new_aggregator;
2074 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2077 ad_clear_agg(aggregator);
2079 if (select_new_active_agg)
2080 ad_agg_selection_logic(__get_first_agg(port),
2081 &dummy_slave_update);
2083 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2086 /* in case that the only port related to this
2087 * aggregator is the one we want to remove
2089 select_new_active_agg = aggregator->is_active;
2090 ad_clear_agg(aggregator);
2091 if (select_new_active_agg) {
2092 netdev_info(bond->dev, "Removing an active aggregator\n");
2093 /* select new active aggregator */
2094 temp_aggregator = __get_first_agg(port);
2095 if (temp_aggregator)
2096 ad_agg_selection_logic(temp_aggregator,
2097 &dummy_slave_update);
2102 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
2104 /* find the aggregator that this port is connected to */
2105 bond_for_each_slave(bond, slave_iter, iter) {
2106 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2108 /* search the port in the aggregator's related ports */
2109 for (temp_port = temp_aggregator->lag_ports; temp_port;
2110 prev_port = temp_port,
2111 temp_port = temp_port->next_port_in_aggregator) {
2112 if (temp_port == port) {
2113 /* the aggregator found - detach the port from
2117 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2119 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2120 temp_aggregator->num_of_ports--;
2121 if (temp_aggregator->num_of_ports == 0) {
2122 select_new_active_agg = temp_aggregator->is_active;
2123 ad_clear_agg(temp_aggregator);
2124 if (select_new_active_agg) {
2125 netdev_info(bond->dev, "Removing an active aggregator\n");
2126 /* select new active aggregator */
2127 ad_agg_selection_logic(__get_first_agg(port),
2128 &dummy_slave_update);
2138 spin_unlock_bh(&bond->mode_lock);
2142 * bond_3ad_state_machine_handler - handle state machines timeout
2143 * @bond: bonding struct to work on
2145 * The state machine handling concept in this module is to check every tick
2146 * which state machine should operate any function. The execution order is
2147 * round robin, so when we have an interaction between state machines, the
2148 * reply of one to each other might be delayed until next tick.
2150 * This function also complete the initialization when the agg_select_timer
2151 * times out, and it selects an aggregator for the ports that are yet not
2152 * related to any aggregator, and selects the active aggregator for a bond.
2154 void bond_3ad_state_machine_handler(struct work_struct *work)
2156 struct bonding *bond = container_of(work, struct bonding,
2158 struct aggregator *aggregator;
2159 struct list_head *iter;
2160 struct slave *slave;
2162 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2163 bool update_slave_arr = false;
2165 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2166 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2167 * concurrently due to incoming LACPDU as well.
2169 spin_lock_bh(&bond->mode_lock);
2172 /* check if there are any slaves */
2173 if (!bond_has_slaves(bond))
2176 /* check if agg_select_timer timer after initialize is timed out */
2177 if (BOND_AD_INFO(bond).agg_select_timer &&
2178 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2179 slave = bond_first_slave_rcu(bond);
2180 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2182 /* select the active aggregator for the bond */
2185 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2190 aggregator = __get_first_agg(port);
2191 ad_agg_selection_logic(aggregator, &update_slave_arr);
2193 bond_3ad_set_carrier(bond);
2196 /* for each port run the state machines */
2197 bond_for_each_slave_rcu(bond, slave, iter) {
2198 port = &(SLAVE_AD_INFO(slave)->port);
2200 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2205 ad_rx_machine(NULL, port);
2206 ad_periodic_machine(port);
2207 ad_port_selection_logic(port, &update_slave_arr);
2208 ad_mux_machine(port, &update_slave_arr);
2209 ad_tx_machine(port);
2210 ad_churn_machine(port);
2212 /* turn off the BEGIN bit, since we already handled it */
2213 if (port->sm_vars & AD_PORT_BEGIN)
2214 port->sm_vars &= ~AD_PORT_BEGIN;
2218 bond_for_each_slave_rcu(bond, slave, iter) {
2219 if (slave->should_notify) {
2220 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2225 spin_unlock_bh(&bond->mode_lock);
2227 if (update_slave_arr)
2228 bond_slave_arr_work_rearm(bond, 0);
2230 if (should_notify_rtnl && rtnl_trylock()) {
2231 bond_slave_state_notify(bond);
2234 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2238 * bond_3ad_rx_indication - handle a received frame
2239 * @lacpdu: received lacpdu
2240 * @slave: slave struct to work on
2241 * @length: length of the data received
2243 * It is assumed that frames that were sent on this NIC don't returned as new
2244 * received frames (loopback). Since only the payload is given to this
2245 * function, it check for loopback.
2247 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2251 int ret = RX_HANDLER_ANOTHER;
2253 if (length >= sizeof(struct lacpdu)) {
2255 port = &(SLAVE_AD_INFO(slave)->port);
2258 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2259 slave->dev->name, slave->bond->dev->name);
2263 switch (lacpdu->subtype) {
2264 case AD_TYPE_LACPDU:
2265 ret = RX_HANDLER_CONSUMED;
2266 netdev_dbg(slave->bond->dev,
2267 "Received LACPDU on port %d slave %s\n",
2268 port->actor_port_number,
2270 /* Protect against concurrent state machines */
2271 spin_lock(&slave->bond->mode_lock);
2272 ad_rx_machine(lacpdu, port);
2273 spin_unlock(&slave->bond->mode_lock);
2276 case AD_TYPE_MARKER:
2277 ret = RX_HANDLER_CONSUMED;
2278 /* No need to convert fields to Little Endian since we
2279 * don't use the marker's fields.
2282 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2283 case AD_MARKER_INFORMATION_SUBTYPE:
2284 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2285 port->actor_port_number);
2286 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2289 case AD_MARKER_RESPONSE_SUBTYPE:
2290 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2291 port->actor_port_number);
2292 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2296 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2297 port->actor_port_number);
2305 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2306 * its current speed and duplex settings.
2308 * @port: the port we'are looking at
2309 * @reset: Boolean to just reset the speed and the duplex part of the key
2311 * The logic to change the oper / admin keys is:
2312 * (a) A full duplex port can participate in LACP with partner.
2313 * (b) When the speed is changed, LACP need to be reinitiated.
2315 static void ad_update_actor_keys(struct port *port, bool reset)
2318 u16 ospeed = 0, speed = 0;
2319 u16 old_oper_key = port->actor_oper_port_key;
2321 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2323 speed = __get_link_speed(port);
2324 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2325 duplex = __get_duplex(port);
2326 port->actor_admin_port_key |= (speed << 1) | duplex;
2328 port->actor_oper_port_key = port->actor_admin_port_key;
2330 if (old_oper_key != port->actor_oper_port_key) {
2331 /* Only 'duplex' port participates in LACP */
2333 port->sm_vars |= AD_PORT_LACP_ENABLED;
2335 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2339 netdev_err(port->slave->dev,
2340 "speed changed to 0 for port %s",
2341 port->slave->dev->name);
2342 } else if (duplex && ospeed != speed) {
2343 /* Speed change restarts LACP state-machine */
2344 port->sm_vars |= AD_PORT_BEGIN;
2351 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2354 * @slave: slave struct to work on
2356 * Handle reselection of aggregator (if needed) for this port.
2358 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2362 port = &(SLAVE_AD_INFO(slave)->port);
2364 /* if slave is null, the whole port is not initialized */
2366 netdev_warn(slave->bond->dev,
2367 "speed/duplex changed for uninitialized port %s\n",
2372 spin_lock_bh(&slave->bond->mode_lock);
2373 ad_update_actor_keys(port, false);
2374 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
2375 port->actor_port_number, slave->dev->name);
2376 spin_unlock_bh(&slave->bond->mode_lock);
2380 * bond_3ad_handle_link_change - handle a slave's link status change indication
2381 * @slave: slave struct to work on
2382 * @status: whether the link is now up or down
2384 * Handle reselection of aggregator (if needed) for this port.
2386 void bond_3ad_handle_link_change(struct slave *slave, char link)
2390 port = &(SLAVE_AD_INFO(slave)->port);
2392 /* if slave is null, the whole port is not initialized */
2394 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2399 spin_lock_bh(&slave->bond->mode_lock);
2400 /* on link down we are zeroing duplex and speed since
2401 * some of the adaptors(ce1000.lan) report full duplex/speed
2402 * instead of N/A(duplex) / 0(speed).
2404 * on link up we are forcing recheck on the duplex and speed since
2405 * some of he adaptors(ce1000.lan) report.
2407 if (link == BOND_LINK_UP) {
2408 port->is_enabled = true;
2409 ad_update_actor_keys(port, false);
2411 /* link has failed */
2412 port->is_enabled = false;
2413 ad_update_actor_keys(port, true);
2415 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2416 port->actor_port_number,
2417 link == BOND_LINK_UP ? "UP" : "DOWN");
2419 spin_unlock_bh(&slave->bond->mode_lock);
2421 /* RTNL is held and mode_lock is released so it's safe
2422 * to update slave_array here.
2424 bond_update_slave_arr(slave->bond, NULL);
2428 * bond_3ad_set_carrier - set link state for bonding master
2429 * @bond - bonding structure
2431 * if we have an active aggregator, we're up, if not, we're down.
2432 * Presumes that we cannot have an active aggregator if there are
2433 * no slaves with link up.
2435 * This behavior complies with IEEE 802.3 section 43.3.9.
2437 * Called by bond_set_carrier(). Return zero if carrier state does not
2438 * change, nonzero if it does.
2440 int bond_3ad_set_carrier(struct bonding *bond)
2442 struct aggregator *active;
2443 struct slave *first_slave;
2447 first_slave = bond_first_slave_rcu(bond);
2452 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2454 /* are enough slaves available to consider link up? */
2455 if (active->num_of_ports < bond->params.min_links) {
2456 if (netif_carrier_ok(bond->dev)) {
2457 netif_carrier_off(bond->dev);
2460 } else if (!netif_carrier_ok(bond->dev)) {
2461 netif_carrier_on(bond->dev);
2464 } else if (netif_carrier_ok(bond->dev)) {
2465 netif_carrier_off(bond->dev);
2473 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2474 * @bond: bonding struct to work on
2475 * @ad_info: ad_info struct to fill with the bond's info
2477 * Returns: 0 on success
2480 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2481 struct ad_info *ad_info)
2483 struct aggregator *aggregator = NULL;
2484 struct list_head *iter;
2485 struct slave *slave;
2488 bond_for_each_slave_rcu(bond, slave, iter) {
2489 port = &(SLAVE_AD_INFO(slave)->port);
2490 if (port->aggregator && port->aggregator->is_active) {
2491 aggregator = port->aggregator;
2499 ad_info->aggregator_id = aggregator->aggregator_identifier;
2500 ad_info->ports = aggregator->num_of_ports;
2501 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2502 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2503 ether_addr_copy(ad_info->partner_system,
2504 aggregator->partner_system.mac_addr_value);
2508 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2513 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2519 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2520 struct slave *slave)
2522 struct lacpdu *lacpdu, _lacpdu;
2524 if (skb->protocol != PKT_TYPE_LACPDU)
2525 return RX_HANDLER_ANOTHER;
2527 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2528 return RX_HANDLER_ANOTHER;
2530 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2532 return RX_HANDLER_ANOTHER;
2534 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
2538 * bond_3ad_update_lacp_rate - change the lacp rate
2539 * @bond - bonding struct
2541 * When modify lacp_rate parameter via sysfs,
2542 * update actor_oper_port_state of each port.
2544 * Hold bond->mode_lock,
2545 * so we can modify port->actor_oper_port_state,
2546 * no matter bond is up or down.
2548 void bond_3ad_update_lacp_rate(struct bonding *bond)
2550 struct port *port = NULL;
2551 struct list_head *iter;
2552 struct slave *slave;
2555 lacp_fast = bond->params.lacp_fast;
2556 spin_lock_bh(&bond->mode_lock);
2557 bond_for_each_slave(bond, slave, iter) {
2558 port = &(SLAVE_AD_INFO(slave)->port);
2560 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2562 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2564 spin_unlock_bh(&bond->mode_lock);