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
74 /* Port Key definitions
75 * key is determined according to the link speed, duplex and
76 * user key (which is yet not supported)
77 * --------------------------------------------------------------
78 * Port key : | User key | Speed | Duplex |
79 * --------------------------------------------------------------
82 #define AD_DUPLEX_KEY_MASKS 0x1
83 #define AD_SPEED_KEY_MASKS 0x3E
84 #define AD_USER_KEY_MASKS 0xFFC0
86 enum ad_link_speed_type {
87 AD_LINK_SPEED_1MBPS = 1,
89 AD_LINK_SPEED_100MBPS,
90 AD_LINK_SPEED_1000MBPS,
91 AD_LINK_SPEED_2500MBPS,
92 AD_LINK_SPEED_10000MBPS,
93 AD_LINK_SPEED_20000MBPS,
94 AD_LINK_SPEED_40000MBPS,
95 AD_LINK_SPEED_56000MBPS
98 /* compare MAC addresses */
99 #define MAC_ADDRESS_EQUAL(A, B) \
100 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
102 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
103 static u16 ad_ticks_per_sec;
104 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
106 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
108 /* ================= main 802.3ad protocol functions ================== */
109 static int ad_lacpdu_send(struct port *port);
110 static int ad_marker_send(struct port *port, struct bond_marker *marker);
111 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
112 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
113 static void ad_tx_machine(struct port *port);
114 static void ad_periodic_machine(struct port *port);
115 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
116 static void ad_agg_selection_logic(struct aggregator *aggregator,
117 bool *update_slave_arr);
118 static void ad_clear_agg(struct aggregator *aggregator);
119 static void ad_initialize_agg(struct aggregator *aggregator);
120 static void ad_initialize_port(struct port *port, int lacp_fast);
121 static void ad_enable_collecting_distributing(struct port *port,
122 bool *update_slave_arr);
123 static void ad_disable_collecting_distributing(struct port *port,
124 bool *update_slave_arr);
125 static void ad_marker_info_received(struct bond_marker *marker_info,
127 static void ad_marker_response_received(struct bond_marker *marker,
131 /* ================= api to bonding and kernel code ================== */
134 * __get_bond_by_port - get the port's bonding struct
135 * @port: the port we're looking at
137 * Return @port's bonding struct, or %NULL if it can't be found.
139 static inline struct bonding *__get_bond_by_port(struct port *port)
141 if (port->slave == NULL)
144 return bond_get_bond_by_slave(port->slave);
148 * __get_first_agg - get the first aggregator in the bond
149 * @bond: the bond we're looking at
151 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
153 * The caller must hold RCU or RTNL lock.
155 static inline struct aggregator *__get_first_agg(struct port *port)
157 struct bonding *bond = __get_bond_by_port(port);
158 struct slave *first_slave;
159 struct aggregator *agg;
161 /* If there's no bond for this port, or bond has no slaves */
166 first_slave = bond_first_slave_rcu(bond);
167 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
174 * __agg_has_partner - see if we have a partner
175 * @agg: the agregator we're looking at
177 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
178 * address for the partner). Return 0 if not.
180 static inline int __agg_has_partner(struct aggregator *agg)
182 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
186 * __disable_port - disable the port's slave
187 * @port: the port we're looking at
189 static inline void __disable_port(struct port *port)
191 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
195 * __enable_port - enable the port's slave, if it's up
196 * @port: the port we're looking at
198 static inline void __enable_port(struct port *port)
200 struct slave *slave = port->slave;
202 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
203 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
207 * __port_is_enabled - check if the port's slave is in active state
208 * @port: the port we're looking at
210 static inline int __port_is_enabled(struct port *port)
212 return bond_is_active_slave(port->slave);
216 * __get_agg_selection_mode - get the aggregator selection mode
217 * @port: the port we're looking at
219 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
221 static inline u32 __get_agg_selection_mode(struct port *port)
223 struct bonding *bond = __get_bond_by_port(port);
226 return BOND_AD_STABLE;
228 return bond->params.ad_select;
232 * __check_agg_selection_timer - check if the selection timer has expired
233 * @port: the port we're looking at
235 static inline int __check_agg_selection_timer(struct port *port)
237 struct bonding *bond = __get_bond_by_port(port);
242 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
246 * __get_link_speed - get a port's speed
247 * @port: the port we're looking at
249 * Return @port's speed in 802.3ad enum format. i.e. one of:
251 * %AD_LINK_SPEED_10MBPS,
252 * %AD_LINK_SPEED_100MBPS,
253 * %AD_LINK_SPEED_1000MBPS,
254 * %AD_LINK_SPEED_2500MBPS,
255 * %AD_LINK_SPEED_10000MBPS
256 * %AD_LINK_SPEED_20000MBPS
257 * %AD_LINK_SPEED_40000MBPS
258 * %AD_LINK_SPEED_56000MBPS
260 static u16 __get_link_speed(struct port *port)
262 struct slave *slave = port->slave;
265 /* this if covers only a special case: when the configuration starts
266 * with link down, it sets the speed to 0.
267 * This is done in spite of the fact that the e100 driver reports 0
268 * to be compatible with MVT in the future.
270 if (slave->link != BOND_LINK_UP)
273 switch (slave->speed) {
275 speed = AD_LINK_SPEED_10MBPS;
279 speed = AD_LINK_SPEED_100MBPS;
283 speed = AD_LINK_SPEED_1000MBPS;
287 speed = AD_LINK_SPEED_2500MBPS;
291 speed = AD_LINK_SPEED_10000MBPS;
295 speed = AD_LINK_SPEED_20000MBPS;
299 speed = AD_LINK_SPEED_40000MBPS;
303 speed = AD_LINK_SPEED_56000MBPS;
307 /* unknown speed value from ethtool. shouldn't happen */
313 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
314 port->actor_port_number, speed);
319 * __get_duplex - get a port's duplex
320 * @port: the port we're looking at
322 * Return @port's duplex in 802.3ad bitmask format. i.e.:
323 * 0x01 if in full duplex
326 static u8 __get_duplex(struct port *port)
328 struct slave *slave = port->slave;
331 /* handling a special case: when the configuration starts with
332 * link down, it sets the duplex to 0.
334 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 /* check if port is not enabled */
1019 else if (!(port->sm_vars & AD_PORT_BEGIN)
1020 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1021 port->sm_rx_state = AD_RX_PORT_DISABLED;
1022 /* check if new lacpdu arrived */
1023 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1024 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1025 (port->sm_rx_state == AD_RX_CURRENT))) {
1026 port->sm_rx_timer_counter = 0;
1027 port->sm_rx_state = AD_RX_CURRENT;
1029 /* if timer is on, and if it is expired */
1030 if (port->sm_rx_timer_counter &&
1031 !(--port->sm_rx_timer_counter)) {
1032 switch (port->sm_rx_state) {
1034 port->sm_rx_state = AD_RX_DEFAULTED;
1037 port->sm_rx_state = AD_RX_EXPIRED;
1043 /* if no lacpdu arrived and no timer is on */
1044 switch (port->sm_rx_state) {
1045 case AD_RX_PORT_DISABLED:
1046 if (port->sm_vars & AD_PORT_MOVED)
1047 port->sm_rx_state = AD_RX_INITIALIZE;
1048 else if (port->is_enabled
1050 & AD_PORT_LACP_ENABLED))
1051 port->sm_rx_state = AD_RX_EXPIRED;
1052 else if (port->is_enabled
1054 & AD_PORT_LACP_ENABLED) == 0))
1055 port->sm_rx_state = AD_RX_LACP_DISABLED;
1064 /* check if the State machine was changed or new lacpdu arrived */
1065 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1066 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1067 port->actor_port_number,
1068 port->slave->dev->name,
1071 switch (port->sm_rx_state) {
1072 case AD_RX_INITIALIZE:
1073 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1074 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1076 port->sm_vars |= AD_PORT_LACP_ENABLED;
1077 port->sm_vars &= ~AD_PORT_SELECTED;
1078 __record_default(port);
1079 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1080 port->sm_vars &= ~AD_PORT_MOVED;
1081 port->sm_rx_state = AD_RX_PORT_DISABLED;
1084 case AD_RX_PORT_DISABLED:
1085 port->sm_vars &= ~AD_PORT_MATCHED;
1087 case AD_RX_LACP_DISABLED:
1088 port->sm_vars &= ~AD_PORT_SELECTED;
1089 __record_default(port);
1090 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1091 port->sm_vars |= AD_PORT_MATCHED;
1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1095 /* Reset of the Synchronization flag (Standard 43.4.12)
1096 * This reset cause to disable this port in the
1097 * COLLECTING_DISTRIBUTING state of the mux machine in
1098 * case of EXPIRED even if LINK_DOWN didn't arrive for
1101 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1102 port->sm_vars &= ~AD_PORT_MATCHED;
1103 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1104 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1105 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1107 case AD_RX_DEFAULTED:
1108 __update_default_selected(port);
1109 __record_default(port);
1110 port->sm_vars |= AD_PORT_MATCHED;
1111 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1114 /* detect loopback situation */
1115 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1116 &(port->actor_system))) {
1117 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
1118 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1119 port->slave->dev->name);
1122 __update_selected(lacpdu, port);
1123 __update_ntt(lacpdu, port);
1124 __record_pdu(lacpdu, port);
1125 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1126 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1135 * ad_tx_machine - handle a port's tx state machine
1136 * @port: the port we're looking at
1138 static void ad_tx_machine(struct port *port)
1140 /* check if tx timer expired, to verify that we do not send more than
1141 * 3 packets per second
1143 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1144 /* check if there is something to send */
1145 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1146 __update_lacpdu_from_port(port);
1148 if (ad_lacpdu_send(port) >= 0) {
1149 pr_debug("Sent LACPDU on port %d\n",
1150 port->actor_port_number);
1152 /* mark ntt as false, so it will not be sent
1153 * again until demanded
1158 /* restart tx timer(to verify that we will not exceed
1159 * AD_MAX_TX_IN_SECOND
1161 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1166 * ad_periodic_machine - handle a port's periodic state machine
1167 * @port: the port we're looking at
1169 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1171 static void ad_periodic_machine(struct port *port)
1173 periodic_states_t last_state;
1175 /* keep current state machine state to compare later if it was changed */
1176 last_state = port->sm_periodic_state;
1178 /* check if port was reinitialized */
1179 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1180 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1182 port->sm_periodic_state = AD_NO_PERIODIC;
1184 /* check if state machine should change state */
1185 else if (port->sm_periodic_timer_counter) {
1186 /* check if periodic state machine expired */
1187 if (!(--port->sm_periodic_timer_counter)) {
1188 /* if expired then do tx */
1189 port->sm_periodic_state = AD_PERIODIC_TX;
1191 /* If not expired, check if there is some new timeout
1192 * parameter from the partner state
1194 switch (port->sm_periodic_state) {
1195 case AD_FAST_PERIODIC:
1196 if (!(port->partner_oper.port_state
1197 & AD_STATE_LACP_TIMEOUT))
1198 port->sm_periodic_state = AD_SLOW_PERIODIC;
1200 case AD_SLOW_PERIODIC:
1201 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1202 port->sm_periodic_timer_counter = 0;
1203 port->sm_periodic_state = AD_PERIODIC_TX;
1211 switch (port->sm_periodic_state) {
1212 case AD_NO_PERIODIC:
1213 port->sm_periodic_state = AD_FAST_PERIODIC;
1215 case AD_PERIODIC_TX:
1216 if (!(port->partner_oper.port_state &
1217 AD_STATE_LACP_TIMEOUT))
1218 port->sm_periodic_state = AD_SLOW_PERIODIC;
1220 port->sm_periodic_state = AD_FAST_PERIODIC;
1227 /* check if the state machine was changed */
1228 if (port->sm_periodic_state != last_state) {
1229 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1230 port->actor_port_number, last_state,
1231 port->sm_periodic_state);
1232 switch (port->sm_periodic_state) {
1233 case AD_NO_PERIODIC:
1234 port->sm_periodic_timer_counter = 0;
1236 case AD_FAST_PERIODIC:
1237 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1238 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1240 case AD_SLOW_PERIODIC:
1241 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1242 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1244 case AD_PERIODIC_TX:
1254 * ad_port_selection_logic - select aggregation groups
1255 * @port: the port we're looking at
1256 * @update_slave_arr: Does slave array need update?
1258 * Select aggregation groups, and assign each port for it's aggregetor. The
1259 * selection logic is called in the inititalization (after all the handshkes),
1260 * and after every lacpdu receive (if selected is off).
1262 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1264 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1265 struct port *last_port = NULL, *curr_port;
1266 struct list_head *iter;
1267 struct bonding *bond;
1268 struct slave *slave;
1271 /* if the port is already Selected, do nothing */
1272 if (port->sm_vars & AD_PORT_SELECTED)
1275 bond = __get_bond_by_port(port);
1277 /* if the port is connected to other aggregator, detach it */
1278 if (port->aggregator) {
1279 /* detach the port from its former aggregator */
1280 temp_aggregator = port->aggregator;
1281 for (curr_port = temp_aggregator->lag_ports; curr_port;
1282 last_port = curr_port,
1283 curr_port = curr_port->next_port_in_aggregator) {
1284 if (curr_port == port) {
1285 temp_aggregator->num_of_ports--;
1286 /* if it is the first port attached to the
1290 temp_aggregator->lag_ports =
1291 port->next_port_in_aggregator;
1293 /* not the first port attached to the
1296 last_port->next_port_in_aggregator =
1297 port->next_port_in_aggregator;
1300 /* clear the port's relations to this
1303 port->aggregator = NULL;
1304 port->next_port_in_aggregator = NULL;
1305 port->actor_port_aggregator_identifier = 0;
1307 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1308 port->actor_port_number,
1309 temp_aggregator->aggregator_identifier);
1310 /* if the aggregator is empty, clear its
1311 * parameters, and set it ready to be attached
1313 if (!temp_aggregator->lag_ports)
1314 ad_clear_agg(temp_aggregator);
1319 /* meaning: the port was related to an aggregator
1320 * but was not on the aggregator port list
1322 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1323 port->slave->bond->dev->name,
1324 port->actor_port_number,
1325 port->slave->dev->name,
1326 port->aggregator->aggregator_identifier);
1329 /* search on all aggregators for a suitable aggregator for this port */
1330 bond_for_each_slave(bond, slave, iter) {
1331 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1333 /* keep a free aggregator for later use(if needed) */
1334 if (!aggregator->lag_ports) {
1335 if (!free_aggregator)
1336 free_aggregator = aggregator;
1339 /* check if current aggregator suits us */
1340 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1341 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1342 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1343 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1345 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1346 !aggregator->is_individual) /* but is not individual OR */
1349 /* attach to the founded aggregator */
1350 port->aggregator = aggregator;
1351 port->actor_port_aggregator_identifier =
1352 port->aggregator->aggregator_identifier;
1353 port->next_port_in_aggregator = aggregator->lag_ports;
1354 port->aggregator->num_of_ports++;
1355 aggregator->lag_ports = port;
1356 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1357 port->actor_port_number,
1358 port->aggregator->aggregator_identifier);
1360 /* mark this port as selected */
1361 port->sm_vars |= AD_PORT_SELECTED;
1367 /* the port couldn't find an aggregator - attach it to a new
1371 if (free_aggregator) {
1372 /* assign port a new aggregator */
1373 port->aggregator = free_aggregator;
1374 port->actor_port_aggregator_identifier =
1375 port->aggregator->aggregator_identifier;
1377 /* update the new aggregator's parameters
1378 * if port was responsed from the end-user
1380 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1381 /* if port is full duplex */
1382 port->aggregator->is_individual = false;
1384 port->aggregator->is_individual = true;
1386 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1387 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1388 port->aggregator->partner_system =
1389 port->partner_oper.system;
1390 port->aggregator->partner_system_priority =
1391 port->partner_oper.system_priority;
1392 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1393 port->aggregator->receive_state = 1;
1394 port->aggregator->transmit_state = 1;
1395 port->aggregator->lag_ports = port;
1396 port->aggregator->num_of_ports++;
1398 /* mark this port as selected */
1399 port->sm_vars |= AD_PORT_SELECTED;
1401 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1402 port->actor_port_number,
1403 port->aggregator->aggregator_identifier);
1405 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1406 port->actor_port_number, port->slave->dev->name);
1409 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1410 * in all aggregator's ports, else set ready=FALSE in all
1411 * aggregator's ports
1413 __set_agg_ports_ready(port->aggregator,
1414 __agg_ports_are_ready(port->aggregator));
1416 aggregator = __get_first_agg(port);
1417 ad_agg_selection_logic(aggregator, update_slave_arr);
1419 if (!port->aggregator->is_active)
1420 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1423 /* Decide if "agg" is a better choice for the new active aggregator that
1424 * the current best, according to the ad_select policy.
1426 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1427 struct aggregator *curr)
1429 /* 0. If no best, select current.
1431 * 1. If the current agg is not individual, and the best is
1432 * individual, select current.
1434 * 2. If current agg is individual and the best is not, keep best.
1436 * 3. Therefore, current and best are both individual or both not
1439 * 3a. If current agg partner replied, and best agg partner did not,
1442 * 3b. If current agg partner did not reply and best agg partner
1443 * did reply, keep best.
1445 * 4. Therefore, current and best both have partner replies or
1446 * both do not, so perform selection policy:
1448 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1449 * select by bandwidth.
1451 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1456 if (!curr->is_individual && best->is_individual)
1459 if (curr->is_individual && !best->is_individual)
1462 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1465 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1468 switch (__get_agg_selection_mode(curr->lag_ports)) {
1470 if (curr->num_of_ports > best->num_of_ports)
1473 if (curr->num_of_ports < best->num_of_ports)
1477 case BOND_AD_STABLE:
1478 case BOND_AD_BANDWIDTH:
1479 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1485 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1486 curr->slave->bond->dev->name,
1487 __get_agg_selection_mode(curr->lag_ports));
1494 static int agg_device_up(const struct aggregator *agg)
1496 struct port *port = agg->lag_ports;
1501 return netif_running(port->slave->dev) &&
1502 netif_carrier_ok(port->slave->dev);
1506 * ad_agg_selection_logic - select an aggregation group for a team
1507 * @aggregator: the aggregator we're looking at
1508 * @update_slave_arr: Does slave array need update?
1510 * It is assumed that only one aggregator may be selected for a team.
1512 * The logic of this function is to select the aggregator according to
1513 * the ad_select policy:
1515 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1516 * it, and to reselect the active aggregator only if the previous
1517 * aggregator has no more ports related to it.
1519 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1520 * bandwidth, and reselect whenever a link state change takes place or the
1521 * set of slaves in the bond changes.
1523 * BOND_AD_COUNT: select the aggregator with largest number of ports
1524 * (slaves), and reselect whenever a link state change takes place or the
1525 * set of slaves in the bond changes.
1527 * FIXME: this function MUST be called with the first agg in the bond, or
1528 * __get_active_agg() won't work correctly. This function should be better
1529 * called with the bond itself, and retrieve the first agg from it.
1531 static void ad_agg_selection_logic(struct aggregator *agg,
1532 bool *update_slave_arr)
1534 struct aggregator *best, *active, *origin;
1535 struct bonding *bond = agg->slave->bond;
1536 struct list_head *iter;
1537 struct slave *slave;
1542 active = __get_active_agg(agg);
1543 best = (active && agg_device_up(active)) ? active : NULL;
1545 bond_for_each_slave_rcu(bond, slave, iter) {
1546 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1550 if (agg->num_of_ports && agg_device_up(agg))
1551 best = ad_agg_selection_test(best, agg);
1555 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1556 /* For the STABLE policy, don't replace the old active
1557 * aggregator if it's still active (it has an answering
1558 * partner) or if both the best and active don't have an
1559 * answering partner.
1561 if (active && active->lag_ports &&
1562 active->lag_ports->is_enabled &&
1563 (__agg_has_partner(active) ||
1564 (!__agg_has_partner(active) &&
1565 !__agg_has_partner(best)))) {
1566 if (!(!active->actor_oper_aggregator_key &&
1567 best->actor_oper_aggregator_key)) {
1569 active->is_active = 1;
1574 if (best && (best == active)) {
1576 active->is_active = 1;
1579 /* if there is new best aggregator, activate it */
1581 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1582 best->aggregator_identifier, best->num_of_ports,
1583 best->actor_oper_aggregator_key,
1584 best->partner_oper_aggregator_key,
1585 best->is_individual, best->is_active);
1586 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1587 best->lag_ports, best->slave,
1588 best->slave ? best->slave->dev->name : "NULL");
1590 bond_for_each_slave_rcu(bond, slave, iter) {
1591 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1593 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1594 agg->aggregator_identifier, agg->num_of_ports,
1595 agg->actor_oper_aggregator_key,
1596 agg->partner_oper_aggregator_key,
1597 agg->is_individual, agg->is_active);
1600 /* check if any partner replys */
1601 if (best->is_individual) {
1602 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1604 best->slave->bond->dev->name : "NULL");
1607 best->is_active = 1;
1608 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1609 best->aggregator_identifier);
1610 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1611 best->aggregator_identifier, best->num_of_ports,
1612 best->actor_oper_aggregator_key,
1613 best->partner_oper_aggregator_key,
1614 best->is_individual, best->is_active);
1616 /* disable the ports that were related to the former
1620 for (port = active->lag_ports; port;
1621 port = port->next_port_in_aggregator) {
1622 __disable_port(port);
1625 /* Slave array needs update. */
1626 *update_slave_arr = true;
1629 /* if the selected aggregator is of join individuals
1630 * (partner_system is NULL), enable their ports
1632 active = __get_active_agg(origin);
1635 if (!__agg_has_partner(active)) {
1636 for (port = active->lag_ports; port;
1637 port = port->next_port_in_aggregator) {
1638 __enable_port(port);
1645 bond_3ad_set_carrier(bond);
1649 * ad_clear_agg - clear a given aggregator's parameters
1650 * @aggregator: the aggregator we're looking at
1652 static void ad_clear_agg(struct aggregator *aggregator)
1655 aggregator->is_individual = false;
1656 aggregator->actor_admin_aggregator_key = 0;
1657 aggregator->actor_oper_aggregator_key = 0;
1658 aggregator->partner_system = null_mac_addr;
1659 aggregator->partner_system_priority = 0;
1660 aggregator->partner_oper_aggregator_key = 0;
1661 aggregator->receive_state = 0;
1662 aggregator->transmit_state = 0;
1663 aggregator->lag_ports = NULL;
1664 aggregator->is_active = 0;
1665 aggregator->num_of_ports = 0;
1666 pr_debug("LAG %d was cleared\n",
1667 aggregator->aggregator_identifier);
1672 * ad_initialize_agg - initialize a given aggregator's parameters
1673 * @aggregator: the aggregator we're looking at
1675 static void ad_initialize_agg(struct aggregator *aggregator)
1678 ad_clear_agg(aggregator);
1680 aggregator->aggregator_mac_address = null_mac_addr;
1681 aggregator->aggregator_identifier = 0;
1682 aggregator->slave = NULL;
1687 * ad_initialize_port - initialize a given port's parameters
1688 * @aggregator: the aggregator we're looking at
1689 * @lacp_fast: boolean. whether fast periodic should be used
1691 static void ad_initialize_port(struct port *port, int lacp_fast)
1693 static const struct port_params tmpl = {
1694 .system_priority = 0xffff,
1697 .port_priority = 0xff,
1700 static const struct lacpdu lacpdu = {
1702 .version_number = 0x01,
1703 .tlv_type_actor_info = 0x01,
1704 .actor_information_length = 0x14,
1705 .tlv_type_partner_info = 0x02,
1706 .partner_information_length = 0x14,
1707 .tlv_type_collector_info = 0x03,
1708 .collector_information_length = 0x10,
1709 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1713 port->actor_port_number = 1;
1714 port->actor_port_priority = 0xff;
1715 port->actor_system = null_mac_addr;
1716 port->actor_system_priority = 0xffff;
1717 port->actor_port_aggregator_identifier = 0;
1719 port->actor_admin_port_key = 1;
1720 port->actor_oper_port_key = 1;
1721 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1722 AD_STATE_LACP_ACTIVITY;
1723 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1724 AD_STATE_LACP_ACTIVITY;
1727 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1729 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1730 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1732 port->is_enabled = true;
1733 /* private parameters */
1734 port->sm_vars = 0x3;
1735 port->sm_rx_state = 0;
1736 port->sm_rx_timer_counter = 0;
1737 port->sm_periodic_state = 0;
1738 port->sm_periodic_timer_counter = 0;
1739 port->sm_mux_state = 0;
1740 port->sm_mux_timer_counter = 0;
1741 port->sm_tx_state = 0;
1742 port->sm_tx_timer_counter = 0;
1744 port->aggregator = NULL;
1745 port->next_port_in_aggregator = NULL;
1746 port->transaction_id = 0;
1748 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1753 * ad_enable_collecting_distributing - enable a port's transmit/receive
1754 * @port: the port we're looking at
1755 * @update_slave_arr: Does slave array need update?
1757 * Enable @port if it's in an active aggregator
1759 static void ad_enable_collecting_distributing(struct port *port,
1760 bool *update_slave_arr)
1762 if (port->aggregator->is_active) {
1763 pr_debug("Enabling port %d(LAG %d)\n",
1764 port->actor_port_number,
1765 port->aggregator->aggregator_identifier);
1766 __enable_port(port);
1767 /* Slave array needs update */
1768 *update_slave_arr = true;
1773 * ad_disable_collecting_distributing - disable a port's transmit/receive
1774 * @port: the port we're looking at
1775 * @update_slave_arr: Does slave array need update?
1777 static void ad_disable_collecting_distributing(struct port *port,
1778 bool *update_slave_arr)
1780 if (port->aggregator &&
1781 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1782 &(null_mac_addr))) {
1783 pr_debug("Disabling port %d(LAG %d)\n",
1784 port->actor_port_number,
1785 port->aggregator->aggregator_identifier);
1786 __disable_port(port);
1787 /* Slave array needs an update */
1788 *update_slave_arr = true;
1793 * ad_marker_info_received - handle receive of a Marker information frame
1794 * @marker_info: Marker info received
1795 * @port: the port we're looking at
1797 static void ad_marker_info_received(struct bond_marker *marker_info,
1800 struct bond_marker marker;
1802 /* copy the received marker data to the response marker */
1803 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1804 /* change the marker subtype to marker response */
1805 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1807 /* send the marker response */
1808 if (ad_marker_send(port, &marker) >= 0) {
1809 pr_debug("Sent Marker Response on port %d\n",
1810 port->actor_port_number);
1815 * ad_marker_response_received - handle receive of a marker response frame
1816 * @marker: marker PDU received
1817 * @port: the port we're looking at
1819 * This function does nothing since we decided not to implement send and handle
1820 * response for marker PDU's, in this stage, but only to respond to marker
1823 static void ad_marker_response_received(struct bond_marker *marker,
1828 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1831 /* ========= AD exported functions to the main bonding code ========= */
1833 /* Check aggregators status in team every T seconds */
1834 #define AD_AGGREGATOR_SELECTION_TIMER 8
1837 * bond_3ad_initiate_agg_selection - initate aggregator selection
1838 * @bond: bonding struct
1840 * Set the aggregation selection timer, to initiate an agg selection in
1841 * the very near future. Called during first initialization, and during
1842 * any down to up transitions of the bond.
1844 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1846 BOND_AD_INFO(bond).agg_select_timer = timeout;
1850 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1851 * @bond: bonding struct to work on
1852 * @tick_resolution: tick duration (millisecond resolution)
1854 * Can be called only after the mac address of the bond is set.
1856 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1858 /* check that the bond is not initialized yet */
1859 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1860 bond->dev->dev_addr)) {
1862 BOND_AD_INFO(bond).aggregator_identifier = 0;
1864 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1865 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1867 /* initialize how many times this module is called in one
1868 * second (should be about every 100ms)
1870 ad_ticks_per_sec = tick_resolution;
1872 bond_3ad_initiate_agg_selection(bond,
1873 AD_AGGREGATOR_SELECTION_TIMER *
1879 * bond_3ad_bind_slave - initialize a slave's port
1880 * @slave: slave struct to work on
1882 * Returns: 0 on success
1885 void bond_3ad_bind_slave(struct slave *slave)
1887 struct bonding *bond = bond_get_bond_by_slave(slave);
1889 struct aggregator *aggregator;
1891 /* check that the slave has not been initialized yet. */
1892 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1894 /* port initialization */
1895 port = &(SLAVE_AD_INFO(slave)->port);
1897 ad_initialize_port(port, bond->params.lacp_fast);
1899 port->slave = slave;
1900 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
1901 /* key is determined according to the link speed, duplex and user key(which
1902 * is yet not supported)
1904 port->actor_admin_port_key = 0;
1905 port->actor_admin_port_key |= __get_duplex(port);
1906 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1907 port->actor_oper_port_key = port->actor_admin_port_key;
1908 /* if the port is not full duplex, then the port should be not
1911 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1912 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1913 /* actor system is the bond's system */
1914 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1915 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1916 * lacpdu's are sent in one second)
1918 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1919 port->aggregator = NULL;
1920 port->next_port_in_aggregator = NULL;
1922 __disable_port(port);
1924 /* aggregator initialization */
1925 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1927 ad_initialize_agg(aggregator);
1929 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1930 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1931 aggregator->slave = slave;
1932 aggregator->is_active = 0;
1933 aggregator->num_of_ports = 0;
1938 * bond_3ad_unbind_slave - deinitialize a slave's port
1939 * @slave: slave struct to work on
1941 * Search for the aggregator that is related to this port, remove the
1942 * aggregator and assign another aggregator for other port related to it
1943 * (if any), and remove the port.
1945 void bond_3ad_unbind_slave(struct slave *slave)
1947 struct port *port, *prev_port, *temp_port;
1948 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1949 int select_new_active_agg = 0;
1950 struct bonding *bond = slave->bond;
1951 struct slave *slave_iter;
1952 struct list_head *iter;
1953 bool dummy_slave_update; /* Ignore this value as caller updates array */
1955 /* Sync against bond_3ad_state_machine_handler() */
1956 spin_lock_bh(&bond->mode_lock);
1957 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1958 port = &(SLAVE_AD_INFO(slave)->port);
1960 /* if slave is null, the whole port is not initialized */
1962 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
1967 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
1968 aggregator->aggregator_identifier);
1970 /* Tell the partner that this port is not suitable for aggregation */
1971 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1972 __update_lacpdu_from_port(port);
1973 ad_lacpdu_send(port);
1975 /* check if this aggregator is occupied */
1976 if (aggregator->lag_ports) {
1977 /* check if there are other ports related to this aggregator
1978 * except the port related to this slave(thats ensure us that
1979 * there is a reason to search for new aggregator, and that we
1982 if ((aggregator->lag_ports != port) ||
1983 (aggregator->lag_ports->next_port_in_aggregator)) {
1984 /* find new aggregator for the related port(s) */
1985 bond_for_each_slave(bond, slave_iter, iter) {
1986 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
1987 /* if the new aggregator is empty, or it is
1988 * connected to our port only
1990 if (!new_aggregator->lag_ports ||
1991 ((new_aggregator->lag_ports == port) &&
1992 !new_aggregator->lag_ports->next_port_in_aggregator))
1996 new_aggregator = NULL;
1998 /* if new aggregator found, copy the aggregator's
1999 * parameters and connect the related lag_ports to the
2002 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2003 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2004 aggregator->aggregator_identifier,
2005 new_aggregator->aggregator_identifier);
2007 if ((new_aggregator->lag_ports == port) &&
2008 new_aggregator->is_active) {
2009 netdev_info(bond->dev, "Removing an active aggregator\n");
2010 select_new_active_agg = 1;
2013 new_aggregator->is_individual = aggregator->is_individual;
2014 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2015 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2016 new_aggregator->partner_system = aggregator->partner_system;
2017 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2018 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2019 new_aggregator->receive_state = aggregator->receive_state;
2020 new_aggregator->transmit_state = aggregator->transmit_state;
2021 new_aggregator->lag_ports = aggregator->lag_ports;
2022 new_aggregator->is_active = aggregator->is_active;
2023 new_aggregator->num_of_ports = aggregator->num_of_ports;
2025 /* update the information that is written on
2026 * the ports about the aggregator
2028 for (temp_port = aggregator->lag_ports; temp_port;
2029 temp_port = temp_port->next_port_in_aggregator) {
2030 temp_port->aggregator = new_aggregator;
2031 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2034 ad_clear_agg(aggregator);
2036 if (select_new_active_agg)
2037 ad_agg_selection_logic(__get_first_agg(port),
2038 &dummy_slave_update);
2040 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2043 /* in case that the only port related to this
2044 * aggregator is the one we want to remove
2046 select_new_active_agg = aggregator->is_active;
2047 ad_clear_agg(aggregator);
2048 if (select_new_active_agg) {
2049 netdev_info(bond->dev, "Removing an active aggregator\n");
2050 /* select new active aggregator */
2051 temp_aggregator = __get_first_agg(port);
2052 if (temp_aggregator)
2053 ad_agg_selection_logic(temp_aggregator,
2054 &dummy_slave_update);
2059 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
2061 /* find the aggregator that this port is connected to */
2062 bond_for_each_slave(bond, slave_iter, iter) {
2063 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2065 /* search the port in the aggregator's related ports */
2066 for (temp_port = temp_aggregator->lag_ports; temp_port;
2067 prev_port = temp_port,
2068 temp_port = temp_port->next_port_in_aggregator) {
2069 if (temp_port == port) {
2070 /* the aggregator found - detach the port from
2074 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2076 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2077 temp_aggregator->num_of_ports--;
2078 if (temp_aggregator->num_of_ports == 0) {
2079 select_new_active_agg = temp_aggregator->is_active;
2080 ad_clear_agg(temp_aggregator);
2081 if (select_new_active_agg) {
2082 netdev_info(bond->dev, "Removing an active aggregator\n");
2083 /* select new active aggregator */
2084 ad_agg_selection_logic(__get_first_agg(port),
2085 &dummy_slave_update);
2095 spin_unlock_bh(&bond->mode_lock);
2099 * bond_3ad_state_machine_handler - handle state machines timeout
2100 * @bond: bonding struct to work on
2102 * The state machine handling concept in this module is to check every tick
2103 * which state machine should operate any function. The execution order is
2104 * round robin, so when we have an interaction between state machines, the
2105 * reply of one to each other might be delayed until next tick.
2107 * This function also complete the initialization when the agg_select_timer
2108 * times out, and it selects an aggregator for the ports that are yet not
2109 * related to any aggregator, and selects the active aggregator for a bond.
2111 void bond_3ad_state_machine_handler(struct work_struct *work)
2113 struct bonding *bond = container_of(work, struct bonding,
2115 struct aggregator *aggregator;
2116 struct list_head *iter;
2117 struct slave *slave;
2119 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2120 bool update_slave_arr = false;
2122 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2123 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2124 * concurrently due to incoming LACPDU as well.
2126 spin_lock_bh(&bond->mode_lock);
2129 /* check if there are any slaves */
2130 if (!bond_has_slaves(bond))
2133 /* check if agg_select_timer timer after initialize is timed out */
2134 if (BOND_AD_INFO(bond).agg_select_timer &&
2135 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2136 slave = bond_first_slave_rcu(bond);
2137 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2139 /* select the active aggregator for the bond */
2142 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2147 aggregator = __get_first_agg(port);
2148 ad_agg_selection_logic(aggregator, &update_slave_arr);
2150 bond_3ad_set_carrier(bond);
2153 /* for each port run the state machines */
2154 bond_for_each_slave_rcu(bond, slave, iter) {
2155 port = &(SLAVE_AD_INFO(slave)->port);
2157 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2162 ad_rx_machine(NULL, port);
2163 ad_periodic_machine(port);
2164 ad_port_selection_logic(port, &update_slave_arr);
2165 ad_mux_machine(port, &update_slave_arr);
2166 ad_tx_machine(port);
2168 /* turn off the BEGIN bit, since we already handled it */
2169 if (port->sm_vars & AD_PORT_BEGIN)
2170 port->sm_vars &= ~AD_PORT_BEGIN;
2174 bond_for_each_slave_rcu(bond, slave, iter) {
2175 if (slave->should_notify) {
2176 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2181 spin_unlock_bh(&bond->mode_lock);
2183 if (update_slave_arr)
2184 bond_slave_arr_work_rearm(bond, 0);
2186 if (should_notify_rtnl && rtnl_trylock()) {
2187 bond_slave_state_notify(bond);
2190 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2194 * bond_3ad_rx_indication - handle a received frame
2195 * @lacpdu: received lacpdu
2196 * @slave: slave struct to work on
2197 * @length: length of the data received
2199 * It is assumed that frames that were sent on this NIC don't returned as new
2200 * received frames (loopback). Since only the payload is given to this
2201 * function, it check for loopback.
2203 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2207 int ret = RX_HANDLER_ANOTHER;
2209 if (length >= sizeof(struct lacpdu)) {
2211 port = &(SLAVE_AD_INFO(slave)->port);
2214 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2215 slave->dev->name, slave->bond->dev->name);
2219 switch (lacpdu->subtype) {
2220 case AD_TYPE_LACPDU:
2221 ret = RX_HANDLER_CONSUMED;
2222 netdev_dbg(slave->bond->dev,
2223 "Received LACPDU on port %d slave %s\n",
2224 port->actor_port_number,
2226 /* Protect against concurrent state machines */
2227 spin_lock(&slave->bond->mode_lock);
2228 ad_rx_machine(lacpdu, port);
2229 spin_unlock(&slave->bond->mode_lock);
2232 case AD_TYPE_MARKER:
2233 ret = RX_HANDLER_CONSUMED;
2234 /* No need to convert fields to Little Endian since we
2235 * don't use the marker's fields.
2238 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2239 case AD_MARKER_INFORMATION_SUBTYPE:
2240 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2241 port->actor_port_number);
2242 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2245 case AD_MARKER_RESPONSE_SUBTYPE:
2246 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2247 port->actor_port_number);
2248 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2252 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2253 port->actor_port_number);
2261 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2262 * @slave: slave struct to work on
2264 * Handle reselection of aggregator (if needed) for this port.
2266 void bond_3ad_adapter_speed_changed(struct slave *slave)
2270 port = &(SLAVE_AD_INFO(slave)->port);
2272 /* if slave is null, the whole port is not initialized */
2274 netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n",
2279 spin_lock_bh(&slave->bond->mode_lock);
2281 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
2282 port->actor_oper_port_key = port->actor_admin_port_key |=
2283 (__get_link_speed(port) << 1);
2284 netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number);
2285 /* there is no need to reselect a new aggregator, just signal the
2286 * state machines to reinitialize
2288 port->sm_vars |= AD_PORT_BEGIN;
2290 spin_unlock_bh(&slave->bond->mode_lock);
2294 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2295 * @slave: slave struct to work on
2297 * Handle reselection of aggregator (if needed) for this port.
2299 void bond_3ad_adapter_duplex_changed(struct slave *slave)
2303 port = &(SLAVE_AD_INFO(slave)->port);
2305 /* if slave is null, the whole port is not initialized */
2307 netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n",
2312 spin_lock_bh(&slave->bond->mode_lock);
2314 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
2315 port->actor_oper_port_key = port->actor_admin_port_key |=
2317 netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n",
2318 port->actor_port_number, slave->dev->name);
2319 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
2320 port->sm_vars |= AD_PORT_LACP_ENABLED;
2321 /* there is no need to reselect a new aggregator, just signal the
2322 * state machines to reinitialize
2324 port->sm_vars |= AD_PORT_BEGIN;
2326 spin_unlock_bh(&slave->bond->mode_lock);
2330 * bond_3ad_handle_link_change - handle a slave's link status change indication
2331 * @slave: slave struct to work on
2332 * @status: whether the link is now up or down
2334 * Handle reselection of aggregator (if needed) for this port.
2336 void bond_3ad_handle_link_change(struct slave *slave, char link)
2340 port = &(SLAVE_AD_INFO(slave)->port);
2342 /* if slave is null, the whole port is not initialized */
2344 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2349 spin_lock_bh(&slave->bond->mode_lock);
2350 /* on link down we are zeroing duplex and speed since
2351 * some of the adaptors(ce1000.lan) report full duplex/speed
2352 * instead of N/A(duplex) / 0(speed).
2354 * on link up we are forcing recheck on the duplex and speed since
2355 * some of he adaptors(ce1000.lan) report.
2357 if (link == BOND_LINK_UP) {
2358 port->is_enabled = true;
2359 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
2360 port->actor_oper_port_key = port->actor_admin_port_key |=
2362 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
2363 port->actor_oper_port_key = port->actor_admin_port_key |=
2364 (__get_link_speed(port) << 1);
2366 /* link has failed */
2367 port->is_enabled = false;
2368 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
2369 port->actor_oper_port_key = (port->actor_admin_port_key &=
2370 ~AD_SPEED_KEY_MASKS);
2372 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2373 port->actor_port_number,
2374 link == BOND_LINK_UP ? "UP" : "DOWN");
2375 /* there is no need to reselect a new aggregator, just signal the
2376 * state machines to reinitialize
2378 port->sm_vars |= AD_PORT_BEGIN;
2380 spin_unlock_bh(&slave->bond->mode_lock);
2382 /* RTNL is held and mode_lock is released so it's safe
2383 * to update slave_array here.
2385 bond_update_slave_arr(slave->bond, NULL);
2389 * bond_3ad_set_carrier - set link state for bonding master
2390 * @bond - bonding structure
2392 * if we have an active aggregator, we're up, if not, we're down.
2393 * Presumes that we cannot have an active aggregator if there are
2394 * no slaves with link up.
2396 * This behavior complies with IEEE 802.3 section 43.3.9.
2398 * Called by bond_set_carrier(). Return zero if carrier state does not
2399 * change, nonzero if it does.
2401 int bond_3ad_set_carrier(struct bonding *bond)
2403 struct aggregator *active;
2404 struct slave *first_slave;
2408 first_slave = bond_first_slave_rcu(bond);
2413 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2415 /* are enough slaves available to consider link up? */
2416 if (active->num_of_ports < bond->params.min_links) {
2417 if (netif_carrier_ok(bond->dev)) {
2418 netif_carrier_off(bond->dev);
2421 } else if (!netif_carrier_ok(bond->dev)) {
2422 netif_carrier_on(bond->dev);
2425 } else if (netif_carrier_ok(bond->dev)) {
2426 netif_carrier_off(bond->dev);
2434 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2435 * @bond: bonding struct to work on
2436 * @ad_info: ad_info struct to fill with the bond's info
2438 * Returns: 0 on success
2441 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2442 struct ad_info *ad_info)
2444 struct aggregator *aggregator = NULL;
2445 struct list_head *iter;
2446 struct slave *slave;
2449 bond_for_each_slave_rcu(bond, slave, iter) {
2450 port = &(SLAVE_AD_INFO(slave)->port);
2451 if (port->aggregator && port->aggregator->is_active) {
2452 aggregator = port->aggregator;
2460 ad_info->aggregator_id = aggregator->aggregator_identifier;
2461 ad_info->ports = aggregator->num_of_ports;
2462 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2463 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2464 ether_addr_copy(ad_info->partner_system,
2465 aggregator->partner_system.mac_addr_value);
2469 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2474 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2480 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2481 struct slave *slave)
2483 struct lacpdu *lacpdu, _lacpdu;
2485 if (skb->protocol != PKT_TYPE_LACPDU)
2486 return RX_HANDLER_ANOTHER;
2488 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2490 return RX_HANDLER_ANOTHER;
2492 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
2496 * bond_3ad_update_lacp_rate - change the lacp rate
2497 * @bond - bonding struct
2499 * When modify lacp_rate parameter via sysfs,
2500 * update actor_oper_port_state of each port.
2502 * Hold bond->mode_lock,
2503 * so we can modify port->actor_oper_port_state,
2504 * no matter bond is up or down.
2506 void bond_3ad_update_lacp_rate(struct bonding *bond)
2508 struct port *port = NULL;
2509 struct list_head *iter;
2510 struct slave *slave;
2513 lacp_fast = bond->params.lacp_fast;
2514 spin_lock_bh(&bond->mode_lock);
2515 bond_for_each_slave(bond, slave, iter) {
2516 port = &(SLAVE_AD_INFO(slave)->port);
2518 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2520 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2522 spin_unlock_bh(&bond->mode_lock);