2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
23 #include <linux/skbuff.h>
24 #include <linux/if_ether.h>
25 #include <linux/netdevice.h>
26 #include <linux/spinlock.h>
27 #include <linux/ethtool.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_bonding.h>
30 #include <linux/pkt_sched.h>
31 #include <net/net_namespace.h>
32 #include <net/bonding.h>
33 #include <net/bond_3ad.h>
35 /* General definitions */
36 #define AD_SHORT_TIMEOUT 1
37 #define AD_LONG_TIMEOUT 0
38 #define AD_STANDBY 0x2
39 #define AD_MAX_TX_IN_SECOND 3
40 #define AD_COLLECTOR_MAX_DELAY 0
42 /* Timer definitions (43.4.4 in the 802.3ad standard) */
43 #define AD_FAST_PERIODIC_TIME 1
44 #define AD_SLOW_PERIODIC_TIME 30
45 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
46 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
47 #define AD_CHURN_DETECTION_TIME 60
48 #define AD_AGGREGATE_WAIT_TIME 2
50 /* Port state definitions (43.4.2.2 in the 802.3ad standard) */
51 #define AD_STATE_LACP_ACTIVITY 0x1
52 #define AD_STATE_LACP_TIMEOUT 0x2
53 #define AD_STATE_AGGREGATION 0x4
54 #define AD_STATE_SYNCHRONIZATION 0x8
55 #define AD_STATE_COLLECTING 0x10
56 #define AD_STATE_DISTRIBUTING 0x20
57 #define AD_STATE_DEFAULTED 0x40
58 #define AD_STATE_EXPIRED 0x80
60 /* Port Variables definitions used by the State Machines (43.4.7 in the
63 #define AD_PORT_BEGIN 0x1
64 #define AD_PORT_LACP_ENABLED 0x2
65 #define AD_PORT_ACTOR_CHURN 0x4
66 #define AD_PORT_PARTNER_CHURN 0x8
67 #define AD_PORT_READY 0x10
68 #define AD_PORT_READY_N 0x20
69 #define AD_PORT_MATCHED 0x40
70 #define AD_PORT_STANDBY 0x80
71 #define AD_PORT_SELECTED 0x100
72 #define AD_PORT_MOVED 0x200
73 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
75 /* Port Key definitions
76 * key is determined according to the link speed, duplex and
77 * user key (which is yet not supported)
78 * --------------------------------------------------------------
79 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
80 * --------------------------------------------------------------
83 #define AD_DUPLEX_KEY_MASKS 0x1
84 #define AD_SPEED_KEY_MASKS 0x3E
85 #define AD_USER_KEY_MASKS 0xFFC0
87 enum ad_link_speed_type {
88 AD_LINK_SPEED_1MBPS = 1,
90 AD_LINK_SPEED_100MBPS,
91 AD_LINK_SPEED_1000MBPS,
92 AD_LINK_SPEED_2500MBPS,
93 AD_LINK_SPEED_10000MBPS,
94 AD_LINK_SPEED_20000MBPS,
95 AD_LINK_SPEED_40000MBPS,
96 AD_LINK_SPEED_56000MBPS,
97 AD_LINK_SPEED_100000MBPS,
100 /* compare MAC addresses */
101 #define MAC_ADDRESS_EQUAL(A, B) \
102 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
104 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
105 static u16 ad_ticks_per_sec;
106 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
108 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
110 /* ================= main 802.3ad protocol functions ================== */
111 static int ad_lacpdu_send(struct port *port);
112 static int ad_marker_send(struct port *port, struct bond_marker *marker);
113 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
114 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
115 static void ad_tx_machine(struct port *port);
116 static void ad_periodic_machine(struct port *port);
117 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
118 static void ad_agg_selection_logic(struct aggregator *aggregator,
119 bool *update_slave_arr);
120 static void ad_clear_agg(struct aggregator *aggregator);
121 static void ad_initialize_agg(struct aggregator *aggregator);
122 static void ad_initialize_port(struct port *port, int lacp_fast);
123 static void ad_enable_collecting_distributing(struct port *port,
124 bool *update_slave_arr);
125 static void ad_disable_collecting_distributing(struct port *port,
126 bool *update_slave_arr);
127 static void ad_marker_info_received(struct bond_marker *marker_info,
129 static void ad_marker_response_received(struct bond_marker *marker,
131 static void ad_update_actor_keys(struct port *port, bool reset);
134 /* ================= api to bonding and kernel code ================== */
137 * __get_bond_by_port - get the port's bonding struct
138 * @port: the port we're looking at
140 * Return @port's bonding struct, or %NULL if it can't be found.
142 static inline struct bonding *__get_bond_by_port(struct port *port)
144 if (port->slave == NULL)
147 return bond_get_bond_by_slave(port->slave);
151 * __get_first_agg - get the first aggregator in the bond
152 * @bond: the bond we're looking at
154 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
156 * The caller must hold RCU or RTNL lock.
158 static inline struct aggregator *__get_first_agg(struct port *port)
160 struct bonding *bond = __get_bond_by_port(port);
161 struct slave *first_slave;
162 struct aggregator *agg;
164 /* If there's no bond for this port, or bond has no slaves */
169 first_slave = bond_first_slave_rcu(bond);
170 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
177 * __agg_has_partner - see if we have a partner
178 * @agg: the agregator we're looking at
180 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
181 * address for the partner). Return 0 if not.
183 static inline int __agg_has_partner(struct aggregator *agg)
185 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
189 * __disable_port - disable the port's slave
190 * @port: the port we're looking at
192 static inline void __disable_port(struct port *port)
194 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
198 * __enable_port - enable the port's slave, if it's up
199 * @port: the port we're looking at
201 static inline void __enable_port(struct port *port)
203 struct slave *slave = port->slave;
205 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
206 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
210 * __port_is_enabled - check if the port's slave is in active state
211 * @port: the port we're looking at
213 static inline int __port_is_enabled(struct port *port)
215 return bond_is_active_slave(port->slave);
219 * __get_agg_selection_mode - get the aggregator selection mode
220 * @port: the port we're looking at
222 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
224 static inline u32 __get_agg_selection_mode(struct port *port)
226 struct bonding *bond = __get_bond_by_port(port);
229 return BOND_AD_STABLE;
231 return bond->params.ad_select;
235 * __check_agg_selection_timer - check if the selection timer has expired
236 * @port: the port we're looking at
238 static inline int __check_agg_selection_timer(struct port *port)
240 struct bonding *bond = __get_bond_by_port(port);
245 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
249 * __get_link_speed - get a port's speed
250 * @port: the port we're looking at
252 * Return @port's speed in 802.3ad enum format. i.e. one of:
254 * %AD_LINK_SPEED_10MBPS,
255 * %AD_LINK_SPEED_100MBPS,
256 * %AD_LINK_SPEED_1000MBPS,
257 * %AD_LINK_SPEED_2500MBPS,
258 * %AD_LINK_SPEED_10000MBPS
259 * %AD_LINK_SPEED_20000MBPS
260 * %AD_LINK_SPEED_40000MBPS
261 * %AD_LINK_SPEED_56000MBPS
262 * %AD_LINK_SPEED_100000MBPS
264 static u16 __get_link_speed(struct port *port)
266 struct slave *slave = port->slave;
269 /* this if covers only a special case: when the configuration starts
270 * with link down, it sets the speed to 0.
271 * This is done in spite of the fact that the e100 driver reports 0
272 * to be compatible with MVT in the future.
274 if (slave->link != BOND_LINK_UP)
277 switch (slave->speed) {
279 speed = AD_LINK_SPEED_10MBPS;
283 speed = AD_LINK_SPEED_100MBPS;
287 speed = AD_LINK_SPEED_1000MBPS;
291 speed = AD_LINK_SPEED_2500MBPS;
295 speed = AD_LINK_SPEED_10000MBPS;
299 speed = AD_LINK_SPEED_20000MBPS;
303 speed = AD_LINK_SPEED_40000MBPS;
307 speed = AD_LINK_SPEED_56000MBPS;
311 speed = AD_LINK_SPEED_100000MBPS;
315 /* unknown speed value from ethtool. shouldn't happen */
321 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
322 port->actor_port_number, speed);
327 * __get_duplex - get a port's duplex
328 * @port: the port we're looking at
330 * Return @port's duplex in 802.3ad bitmask format. i.e.:
331 * 0x01 if in full duplex
334 static u8 __get_duplex(struct port *port)
336 struct slave *slave = port->slave;
339 /* handling a special case: when the configuration starts with
340 * link down, it sets the duplex to 0.
342 if (slave->link == BOND_LINK_UP) {
343 switch (slave->duplex) {
346 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
347 port->actor_port_number);
352 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
353 port->actor_port_number);
360 static void __ad_actor_update_port(struct port *port)
362 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
364 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
365 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
371 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
372 * @timer_type: which timer to operate
373 * @par: timer parameter. see below
375 * If @timer_type is %current_while_timer, @par indicates long/short timer.
376 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
377 * %SLOW_PERIODIC_TIME.
379 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
381 u16 retval = 0; /* to silence the compiler */
383 switch (timer_type) {
384 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
386 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
388 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
390 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
391 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
393 case AD_PERIODIC_TIMER: /* for periodic machine */
394 retval = (par*ad_ticks_per_sec); /* long timeout */
396 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
397 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
399 case AD_WAIT_WHILE_TIMER: /* for selection machine */
400 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
408 /* ================= ad_rx_machine helper functions ================== */
411 * __choose_matched - update a port's matched variable from a received lacpdu
412 * @lacpdu: the lacpdu we've received
413 * @port: the port we're looking at
415 * Update the value of the matched variable, using parameter values from a
416 * newly received lacpdu. Parameter values for the partner carried in the
417 * received PDU are compared with the corresponding operational parameter
418 * values for the actor. Matched is set to TRUE if all of these parameters
419 * match and the PDU parameter partner_state.aggregation has the same value as
420 * actor_oper_port_state.aggregation and lacp will actively maintain the link
421 * in the aggregation. Matched is also set to TRUE if the value of
422 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
423 * an individual link and lacp will actively maintain the link. Otherwise,
424 * matched is set to FALSE. LACP is considered to be actively maintaining the
425 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
426 * the actor's actor_oper_port_state.lacp_activity and the PDU's
427 * partner_state.lacp_activity variables are TRUE.
429 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
430 * used here to implement the language from 802.3ad 43.4.9 that requires
431 * recordPDU to "match" the LACPDU parameters to the stored values.
433 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
435 /* check if all parameters are alike
436 * or this is individual link(aggregation == FALSE)
437 * then update the state machine Matched variable.
439 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
440 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
441 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
442 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
443 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
444 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
445 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
447 port->sm_vars |= AD_PORT_MATCHED;
449 port->sm_vars &= ~AD_PORT_MATCHED;
454 * __record_pdu - record parameters from a received lacpdu
455 * @lacpdu: the lacpdu we've received
456 * @port: the port we're looking at
458 * Record the parameter values for the Actor carried in a received lacpdu as
459 * the current partner operational parameter values and sets
460 * actor_oper_port_state.defaulted to FALSE.
462 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
464 if (lacpdu && port) {
465 struct port_params *partner = &port->partner_oper;
467 __choose_matched(lacpdu, port);
468 /* record the new parameter values for the partner
471 partner->port_number = ntohs(lacpdu->actor_port);
472 partner->port_priority = ntohs(lacpdu->actor_port_priority);
473 partner->system = lacpdu->actor_system;
474 partner->system_priority = ntohs(lacpdu->actor_system_priority);
475 partner->key = ntohs(lacpdu->actor_key);
476 partner->port_state = lacpdu->actor_state;
478 /* set actor_oper_port_state.defaulted to FALSE */
479 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
481 /* set the partner sync. to on if the partner is sync,
482 * and the port is matched
484 if ((port->sm_vars & AD_PORT_MATCHED) &&
485 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
486 partner->port_state |= AD_STATE_SYNCHRONIZATION;
487 pr_debug("%s partner sync=1\n", port->slave->dev->name);
489 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
490 pr_debug("%s partner sync=0\n", port->slave->dev->name);
496 * __record_default - record default parameters
497 * @port: the port we're looking at
499 * This function records the default parameter values for the partner carried
500 * in the Partner Admin parameters as the current partner operational parameter
501 * values and sets actor_oper_port_state.defaulted to TRUE.
503 static void __record_default(struct port *port)
506 /* record the partner admin parameters */
507 memcpy(&port->partner_oper, &port->partner_admin,
508 sizeof(struct port_params));
510 /* set actor_oper_port_state.defaulted to true */
511 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
516 * __update_selected - update a port's Selected variable from a received lacpdu
517 * @lacpdu: the lacpdu we've received
518 * @port: the port we're looking at
520 * Update the value of the selected variable, using parameter values from a
521 * newly received lacpdu. The parameter values for the Actor carried in the
522 * received PDU are compared with the corresponding operational parameter
523 * values for the ports partner. If one or more of the comparisons shows that
524 * the value(s) received in the PDU differ from the current operational values,
525 * then selected is set to FALSE and actor_oper_port_state.synchronization is
526 * set to out_of_sync. Otherwise, selected remains unchanged.
528 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
530 if (lacpdu && port) {
531 const struct port_params *partner = &port->partner_oper;
533 /* check if any parameter is different then
534 * update the state machine selected variable.
536 if (ntohs(lacpdu->actor_port) != partner->port_number ||
537 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
538 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
539 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
540 ntohs(lacpdu->actor_key) != partner->key ||
541 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
542 port->sm_vars &= ~AD_PORT_SELECTED;
548 * __update_default_selected - update a port's Selected variable from Partner
549 * @port: the port we're looking at
551 * This function updates the value of the selected variable, using the partner
552 * administrative parameter values. The administrative values are compared with
553 * the corresponding operational parameter values for the partner. If one or
554 * more of the comparisons shows that the administrative value(s) differ from
555 * the current operational values, then Selected is set to FALSE and
556 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
557 * Selected remains unchanged.
559 static void __update_default_selected(struct port *port)
562 const struct port_params *admin = &port->partner_admin;
563 const struct port_params *oper = &port->partner_oper;
565 /* check if any parameter is different then
566 * update the state machine selected variable.
568 if (admin->port_number != oper->port_number ||
569 admin->port_priority != oper->port_priority ||
570 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
571 admin->system_priority != oper->system_priority ||
572 admin->key != oper->key ||
573 (admin->port_state & AD_STATE_AGGREGATION)
574 != (oper->port_state & AD_STATE_AGGREGATION)) {
575 port->sm_vars &= ~AD_PORT_SELECTED;
581 * __update_ntt - update a port's ntt variable from a received lacpdu
582 * @lacpdu: the lacpdu we've received
583 * @port: the port we're looking at
585 * Updates the value of the ntt variable, using parameter values from a newly
586 * received lacpdu. The parameter values for the partner carried in the
587 * received PDU are compared with the corresponding operational parameter
588 * values for the Actor. If one or more of the comparisons shows that the
589 * value(s) received in the PDU differ from the current operational values,
590 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
592 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
594 /* validate lacpdu and port */
595 if (lacpdu && port) {
596 /* check if any parameter is different then
597 * update the port->ntt.
599 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
600 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
601 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
602 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
603 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
604 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
605 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
606 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
607 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
615 * __agg_ports_are_ready - check if all ports in an aggregator are ready
616 * @aggregator: the aggregator we're looking at
619 static int __agg_ports_are_ready(struct aggregator *aggregator)
625 /* scan all ports in this aggregator to verfy if they are
628 for (port = aggregator->lag_ports;
630 port = port->next_port_in_aggregator) {
631 if (!(port->sm_vars & AD_PORT_READY_N)) {
642 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
643 * @aggregator: the aggregator we're looking at
644 * @val: Should the ports' ready bit be set on or off
647 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
651 for (port = aggregator->lag_ports; port;
652 port = port->next_port_in_aggregator) {
654 port->sm_vars |= AD_PORT_READY;
656 port->sm_vars &= ~AD_PORT_READY;
660 static int __agg_active_ports(struct aggregator *agg)
665 for (port = agg->lag_ports; port;
666 port = port->next_port_in_aggregator) {
667 if (port->is_enabled)
675 * __get_agg_bandwidth - get the total bandwidth of an aggregator
676 * @aggregator: the aggregator we're looking at
679 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
681 int nports = __agg_active_ports(aggregator);
685 switch (__get_link_speed(aggregator->lag_ports)) {
686 case AD_LINK_SPEED_1MBPS:
689 case AD_LINK_SPEED_10MBPS:
690 bandwidth = nports * 10;
692 case AD_LINK_SPEED_100MBPS:
693 bandwidth = nports * 100;
695 case AD_LINK_SPEED_1000MBPS:
696 bandwidth = nports * 1000;
698 case AD_LINK_SPEED_2500MBPS:
699 bandwidth = nports * 2500;
701 case AD_LINK_SPEED_10000MBPS:
702 bandwidth = nports * 10000;
704 case AD_LINK_SPEED_20000MBPS:
705 bandwidth = nports * 20000;
707 case AD_LINK_SPEED_40000MBPS:
708 bandwidth = nports * 40000;
710 case AD_LINK_SPEED_56000MBPS:
711 bandwidth = nports * 56000;
713 case AD_LINK_SPEED_100000MBPS:
714 bandwidth = nports * 100000;
717 bandwidth = 0; /* to silence the compiler */
724 * __get_active_agg - get the current active aggregator
725 * @aggregator: the aggregator we're looking at
727 * Caller must hold RCU lock.
729 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
731 struct bonding *bond = aggregator->slave->bond;
732 struct list_head *iter;
735 bond_for_each_slave_rcu(bond, slave, iter)
736 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
737 return &(SLAVE_AD_INFO(slave)->aggregator);
743 * __update_lacpdu_from_port - update a port's lacpdu fields
744 * @port: the port we're looking at
746 static inline void __update_lacpdu_from_port(struct port *port)
748 struct lacpdu *lacpdu = &port->lacpdu;
749 const struct port_params *partner = &port->partner_oper;
751 /* update current actual Actor parameters
752 * lacpdu->subtype initialized
753 * lacpdu->version_number initialized
754 * lacpdu->tlv_type_actor_info initialized
755 * lacpdu->actor_information_length initialized
758 lacpdu->actor_system_priority = htons(port->actor_system_priority);
759 lacpdu->actor_system = port->actor_system;
760 lacpdu->actor_key = htons(port->actor_oper_port_key);
761 lacpdu->actor_port_priority = htons(port->actor_port_priority);
762 lacpdu->actor_port = htons(port->actor_port_number);
763 lacpdu->actor_state = port->actor_oper_port_state;
764 pr_debug("update lacpdu: %s, actor port state %x\n",
765 port->slave->dev->name, port->actor_oper_port_state);
767 /* lacpdu->reserved_3_1 initialized
768 * lacpdu->tlv_type_partner_info initialized
769 * lacpdu->partner_information_length initialized
772 lacpdu->partner_system_priority = htons(partner->system_priority);
773 lacpdu->partner_system = partner->system;
774 lacpdu->partner_key = htons(partner->key);
775 lacpdu->partner_port_priority = htons(partner->port_priority);
776 lacpdu->partner_port = htons(partner->port_number);
777 lacpdu->partner_state = partner->port_state;
779 /* lacpdu->reserved_3_2 initialized
780 * lacpdu->tlv_type_collector_info initialized
781 * lacpdu->collector_information_length initialized
782 * collector_max_delay initialized
783 * reserved_12[12] initialized
784 * tlv_type_terminator initialized
785 * terminator_length initialized
786 * reserved_50[50] initialized
790 /* ================= main 802.3ad protocol code ========================= */
793 * ad_lacpdu_send - send out a lacpdu packet on a given port
794 * @port: the port we're looking at
796 * Returns: 0 on success
799 static int ad_lacpdu_send(struct port *port)
801 struct slave *slave = port->slave;
803 struct lacpdu_header *lacpdu_header;
804 int length = sizeof(struct lacpdu_header);
806 skb = dev_alloc_skb(length);
810 skb->dev = slave->dev;
811 skb_reset_mac_header(skb);
812 skb->network_header = skb->mac_header + ETH_HLEN;
813 skb->protocol = PKT_TYPE_LACPDU;
814 skb->priority = TC_PRIO_CONTROL;
816 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
818 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
819 /* Note: source address is set to be the member's PERMANENT address,
820 * because we use it to identify loopback lacpdus in receive.
822 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
823 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
825 lacpdu_header->lacpdu = port->lacpdu;
833 * ad_marker_send - send marker information/response on a given port
834 * @port: the port we're looking at
835 * @marker: marker data to send
837 * Returns: 0 on success
840 static int ad_marker_send(struct port *port, struct bond_marker *marker)
842 struct slave *slave = port->slave;
844 struct bond_marker_header *marker_header;
845 int length = sizeof(struct bond_marker_header);
847 skb = dev_alloc_skb(length + 16);
851 skb_reserve(skb, 16);
853 skb->dev = slave->dev;
854 skb_reset_mac_header(skb);
855 skb->network_header = skb->mac_header + ETH_HLEN;
856 skb->protocol = PKT_TYPE_LACPDU;
858 marker_header = (struct bond_marker_header *)skb_put(skb, length);
860 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
861 /* Note: source address is set to be the member's PERMANENT address,
862 * because we use it to identify loopback MARKERs in receive.
864 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
865 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
867 marker_header->marker = *marker;
875 * ad_mux_machine - handle a port's mux state machine
876 * @port: the port we're looking at
877 * @update_slave_arr: Does slave array need update?
879 static void ad_mux_machine(struct port *port, bool *update_slave_arr)
881 mux_states_t last_state;
883 /* keep current State Machine state to compare later if it was
886 last_state = port->sm_mux_state;
888 if (port->sm_vars & AD_PORT_BEGIN) {
889 port->sm_mux_state = AD_MUX_DETACHED;
891 switch (port->sm_mux_state) {
892 case AD_MUX_DETACHED:
893 if ((port->sm_vars & AD_PORT_SELECTED)
894 || (port->sm_vars & AD_PORT_STANDBY))
895 /* if SELECTED or STANDBY */
896 port->sm_mux_state = AD_MUX_WAITING;
899 /* if SELECTED == FALSE return to DETACH state */
900 if (!(port->sm_vars & AD_PORT_SELECTED)) {
901 port->sm_vars &= ~AD_PORT_READY_N;
902 /* in order to withhold the Selection Logic to
903 * check all ports READY_N value every callback
904 * cycle to update ready variable, we check
905 * READY_N and update READY here
907 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
908 port->sm_mux_state = AD_MUX_DETACHED;
912 /* check if the wait_while_timer expired */
913 if (port->sm_mux_timer_counter
914 && !(--port->sm_mux_timer_counter))
915 port->sm_vars |= AD_PORT_READY_N;
917 /* in order to withhold the selection logic to check
918 * all ports READY_N value every callback cycle to
919 * update ready variable, we check READY_N and update
922 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
924 /* if the wait_while_timer expired, and the port is
925 * in READY state, move to ATTACHED state
927 if ((port->sm_vars & AD_PORT_READY)
928 && !port->sm_mux_timer_counter)
929 port->sm_mux_state = AD_MUX_ATTACHED;
931 case AD_MUX_ATTACHED:
932 /* check also if agg_select_timer expired (so the
933 * edable port will take place only after this timer)
935 if ((port->sm_vars & AD_PORT_SELECTED) &&
936 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
937 !__check_agg_selection_timer(port)) {
938 if (port->aggregator->is_active)
940 AD_MUX_COLLECTING_DISTRIBUTING;
941 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
942 (port->sm_vars & AD_PORT_STANDBY)) {
943 /* if UNSELECTED or STANDBY */
944 port->sm_vars &= ~AD_PORT_READY_N;
945 /* in order to withhold the selection logic to
946 * check all ports READY_N value every callback
947 * cycle to update ready variable, we check
948 * READY_N and update READY here
950 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
951 port->sm_mux_state = AD_MUX_DETACHED;
952 } else if (port->aggregator->is_active) {
953 port->actor_oper_port_state |=
954 AD_STATE_SYNCHRONIZATION;
957 case AD_MUX_COLLECTING_DISTRIBUTING:
958 if (!(port->sm_vars & AD_PORT_SELECTED) ||
959 (port->sm_vars & AD_PORT_STANDBY) ||
960 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
961 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
962 port->sm_mux_state = AD_MUX_ATTACHED;
964 /* if port state hasn't changed make
965 * sure that a collecting distributing
966 * port in an active aggregator is enabled
968 if (port->aggregator &&
969 port->aggregator->is_active &&
970 !__port_is_enabled(port)) {
981 /* check if the state machine was changed */
982 if (port->sm_mux_state != last_state) {
983 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
984 port->actor_port_number,
985 port->slave->dev->name,
988 switch (port->sm_mux_state) {
989 case AD_MUX_DETACHED:
990 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
991 ad_disable_collecting_distributing(port,
993 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
994 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
998 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1000 case AD_MUX_ATTACHED:
1001 if (port->aggregator->is_active)
1002 port->actor_oper_port_state |=
1003 AD_STATE_SYNCHRONIZATION;
1005 port->actor_oper_port_state &=
1006 ~AD_STATE_SYNCHRONIZATION;
1007 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1008 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1009 ad_disable_collecting_distributing(port,
1013 case AD_MUX_COLLECTING_DISTRIBUTING:
1014 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1015 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1016 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1017 ad_enable_collecting_distributing(port,
1028 * ad_rx_machine - handle a port's rx State Machine
1029 * @lacpdu: the lacpdu we've received
1030 * @port: the port we're looking at
1032 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1033 * CURRENT. If timer expired set the state machine in the proper state.
1034 * In other cases, this function checks if we need to switch to other state.
1036 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1038 rx_states_t last_state;
1040 /* keep current State Machine state to compare later if it was
1043 last_state = port->sm_rx_state;
1045 /* check if state machine should change state */
1047 /* first, check if port was reinitialized */
1048 if (port->sm_vars & AD_PORT_BEGIN) {
1049 port->sm_rx_state = AD_RX_INITIALIZE;
1050 port->sm_vars |= AD_PORT_CHURNED;
1051 /* check if port is not enabled */
1052 } else if (!(port->sm_vars & AD_PORT_BEGIN)
1053 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1054 port->sm_rx_state = AD_RX_PORT_DISABLED;
1055 /* check if new lacpdu arrived */
1056 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1057 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1058 (port->sm_rx_state == AD_RX_CURRENT))) {
1059 if (port->sm_rx_state != AD_RX_CURRENT)
1060 port->sm_vars |= AD_PORT_CHURNED;
1061 port->sm_rx_timer_counter = 0;
1062 port->sm_rx_state = AD_RX_CURRENT;
1064 /* if timer is on, and if it is expired */
1065 if (port->sm_rx_timer_counter &&
1066 !(--port->sm_rx_timer_counter)) {
1067 switch (port->sm_rx_state) {
1069 port->sm_rx_state = AD_RX_DEFAULTED;
1072 port->sm_rx_state = AD_RX_EXPIRED;
1078 /* if no lacpdu arrived and no timer is on */
1079 switch (port->sm_rx_state) {
1080 case AD_RX_PORT_DISABLED:
1081 if (port->sm_vars & AD_PORT_MOVED)
1082 port->sm_rx_state = AD_RX_INITIALIZE;
1083 else if (port->is_enabled
1085 & AD_PORT_LACP_ENABLED))
1086 port->sm_rx_state = AD_RX_EXPIRED;
1087 else if (port->is_enabled
1089 & AD_PORT_LACP_ENABLED) == 0))
1090 port->sm_rx_state = AD_RX_LACP_DISABLED;
1099 /* check if the State machine was changed or new lacpdu arrived */
1100 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1101 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1102 port->actor_port_number,
1103 port->slave->dev->name,
1106 switch (port->sm_rx_state) {
1107 case AD_RX_INITIALIZE:
1108 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1109 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1111 port->sm_vars |= AD_PORT_LACP_ENABLED;
1112 port->sm_vars &= ~AD_PORT_SELECTED;
1113 __record_default(port);
1114 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1115 port->sm_vars &= ~AD_PORT_MOVED;
1116 port->sm_rx_state = AD_RX_PORT_DISABLED;
1119 case AD_RX_PORT_DISABLED:
1120 port->sm_vars &= ~AD_PORT_MATCHED;
1122 case AD_RX_LACP_DISABLED:
1123 port->sm_vars &= ~AD_PORT_SELECTED;
1124 __record_default(port);
1125 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1126 port->sm_vars |= AD_PORT_MATCHED;
1127 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1130 /* Reset of the Synchronization flag (Standard 43.4.12)
1131 * This reset cause to disable this port in the
1132 * COLLECTING_DISTRIBUTING state of the mux machine in
1133 * case of EXPIRED even if LINK_DOWN didn't arrive for
1136 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1137 port->sm_vars &= ~AD_PORT_MATCHED;
1138 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
1139 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1140 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1141 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1142 port->sm_vars |= AD_PORT_CHURNED;
1144 case AD_RX_DEFAULTED:
1145 __update_default_selected(port);
1146 __record_default(port);
1147 port->sm_vars |= AD_PORT_MATCHED;
1148 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1151 /* detect loopback situation */
1152 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1153 &(port->actor_system))) {
1154 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
1155 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1156 port->slave->dev->name);
1159 __update_selected(lacpdu, port);
1160 __update_ntt(lacpdu, port);
1161 __record_pdu(lacpdu, port);
1162 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1163 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1172 * ad_churn_machine - handle port churn's state machine
1173 * @port: the port we're looking at
1176 static void ad_churn_machine(struct port *port)
1178 if (port->sm_vars & AD_PORT_CHURNED) {
1179 port->sm_vars &= ~AD_PORT_CHURNED;
1180 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1181 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1182 port->sm_churn_actor_timer_counter =
1183 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1184 port->sm_churn_partner_timer_counter =
1185 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1188 if (port->sm_churn_actor_timer_counter &&
1189 !(--port->sm_churn_actor_timer_counter) &&
1190 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1191 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1192 port->sm_churn_actor_state = AD_NO_CHURN;
1194 port->churn_actor_count++;
1195 port->sm_churn_actor_state = AD_CHURN;
1198 if (port->sm_churn_partner_timer_counter &&
1199 !(--port->sm_churn_partner_timer_counter) &&
1200 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1201 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1202 port->sm_churn_partner_state = AD_NO_CHURN;
1204 port->churn_partner_count++;
1205 port->sm_churn_partner_state = AD_CHURN;
1211 * ad_tx_machine - handle a port's tx state machine
1212 * @port: the port we're looking at
1214 static void ad_tx_machine(struct port *port)
1216 /* check if tx timer expired, to verify that we do not send more than
1217 * 3 packets per second
1219 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1220 /* check if there is something to send */
1221 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1222 __update_lacpdu_from_port(port);
1224 if (ad_lacpdu_send(port) >= 0) {
1225 pr_debug("Sent LACPDU on port %d\n",
1226 port->actor_port_number);
1228 /* mark ntt as false, so it will not be sent
1229 * again until demanded
1234 /* restart tx timer(to verify that we will not exceed
1235 * AD_MAX_TX_IN_SECOND
1237 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1242 * ad_periodic_machine - handle a port's periodic state machine
1243 * @port: the port we're looking at
1245 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1247 static void ad_periodic_machine(struct port *port)
1249 periodic_states_t last_state;
1251 /* keep current state machine state to compare later if it was changed */
1252 last_state = port->sm_periodic_state;
1254 /* check if port was reinitialized */
1255 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1256 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1258 port->sm_periodic_state = AD_NO_PERIODIC;
1260 /* check if state machine should change state */
1261 else if (port->sm_periodic_timer_counter) {
1262 /* check if periodic state machine expired */
1263 if (!(--port->sm_periodic_timer_counter)) {
1264 /* if expired then do tx */
1265 port->sm_periodic_state = AD_PERIODIC_TX;
1267 /* If not expired, check if there is some new timeout
1268 * parameter from the partner state
1270 switch (port->sm_periodic_state) {
1271 case AD_FAST_PERIODIC:
1272 if (!(port->partner_oper.port_state
1273 & AD_STATE_LACP_TIMEOUT))
1274 port->sm_periodic_state = AD_SLOW_PERIODIC;
1276 case AD_SLOW_PERIODIC:
1277 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1278 port->sm_periodic_timer_counter = 0;
1279 port->sm_periodic_state = AD_PERIODIC_TX;
1287 switch (port->sm_periodic_state) {
1288 case AD_NO_PERIODIC:
1289 port->sm_periodic_state = AD_FAST_PERIODIC;
1291 case AD_PERIODIC_TX:
1292 if (!(port->partner_oper.port_state &
1293 AD_STATE_LACP_TIMEOUT))
1294 port->sm_periodic_state = AD_SLOW_PERIODIC;
1296 port->sm_periodic_state = AD_FAST_PERIODIC;
1303 /* check if the state machine was changed */
1304 if (port->sm_periodic_state != last_state) {
1305 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1306 port->actor_port_number, last_state,
1307 port->sm_periodic_state);
1308 switch (port->sm_periodic_state) {
1309 case AD_NO_PERIODIC:
1310 port->sm_periodic_timer_counter = 0;
1312 case AD_FAST_PERIODIC:
1313 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1314 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1316 case AD_SLOW_PERIODIC:
1317 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1318 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1320 case AD_PERIODIC_TX:
1330 * ad_port_selection_logic - select aggregation groups
1331 * @port: the port we're looking at
1332 * @update_slave_arr: Does slave array need update?
1334 * Select aggregation groups, and assign each port for it's aggregetor. The
1335 * selection logic is called in the inititalization (after all the handshkes),
1336 * and after every lacpdu receive (if selected is off).
1338 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1340 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1341 struct port *last_port = NULL, *curr_port;
1342 struct list_head *iter;
1343 struct bonding *bond;
1344 struct slave *slave;
1347 /* if the port is already Selected, do nothing */
1348 if (port->sm_vars & AD_PORT_SELECTED)
1351 bond = __get_bond_by_port(port);
1353 /* if the port is connected to other aggregator, detach it */
1354 if (port->aggregator) {
1355 /* detach the port from its former aggregator */
1356 temp_aggregator = port->aggregator;
1357 for (curr_port = temp_aggregator->lag_ports; curr_port;
1358 last_port = curr_port,
1359 curr_port = curr_port->next_port_in_aggregator) {
1360 if (curr_port == port) {
1361 temp_aggregator->num_of_ports--;
1362 /* if it is the first port attached to the
1366 temp_aggregator->lag_ports =
1367 port->next_port_in_aggregator;
1369 /* not the first port attached to the
1372 last_port->next_port_in_aggregator =
1373 port->next_port_in_aggregator;
1376 /* clear the port's relations to this
1379 port->aggregator = NULL;
1380 port->next_port_in_aggregator = NULL;
1381 port->actor_port_aggregator_identifier = 0;
1383 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1384 port->actor_port_number,
1385 temp_aggregator->aggregator_identifier);
1386 /* if the aggregator is empty, clear its
1387 * parameters, and set it ready to be attached
1389 if (!temp_aggregator->lag_ports)
1390 ad_clear_agg(temp_aggregator);
1395 /* meaning: the port was related to an aggregator
1396 * but was not on the aggregator port list
1398 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1399 port->slave->bond->dev->name,
1400 port->actor_port_number,
1401 port->slave->dev->name,
1402 port->aggregator->aggregator_identifier);
1405 /* search on all aggregators for a suitable aggregator for this port */
1406 bond_for_each_slave(bond, slave, iter) {
1407 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1409 /* keep a free aggregator for later use(if needed) */
1410 if (!aggregator->lag_ports) {
1411 if (!free_aggregator)
1412 free_aggregator = aggregator;
1415 /* check if current aggregator suits us */
1416 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1417 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1418 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1419 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1421 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1422 !aggregator->is_individual) /* but is not individual OR */
1425 /* attach to the founded aggregator */
1426 port->aggregator = aggregator;
1427 port->actor_port_aggregator_identifier =
1428 port->aggregator->aggregator_identifier;
1429 port->next_port_in_aggregator = aggregator->lag_ports;
1430 port->aggregator->num_of_ports++;
1431 aggregator->lag_ports = port;
1432 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1433 port->actor_port_number,
1434 port->aggregator->aggregator_identifier);
1436 /* mark this port as selected */
1437 port->sm_vars |= AD_PORT_SELECTED;
1443 /* the port couldn't find an aggregator - attach it to a new
1447 if (free_aggregator) {
1448 /* assign port a new aggregator */
1449 port->aggregator = free_aggregator;
1450 port->actor_port_aggregator_identifier =
1451 port->aggregator->aggregator_identifier;
1453 /* update the new aggregator's parameters
1454 * if port was responsed from the end-user
1456 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1457 /* if port is full duplex */
1458 port->aggregator->is_individual = false;
1460 port->aggregator->is_individual = true;
1462 port->aggregator->actor_admin_aggregator_key =
1463 port->actor_admin_port_key;
1464 port->aggregator->actor_oper_aggregator_key =
1465 port->actor_oper_port_key;
1466 port->aggregator->partner_system =
1467 port->partner_oper.system;
1468 port->aggregator->partner_system_priority =
1469 port->partner_oper.system_priority;
1470 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1471 port->aggregator->receive_state = 1;
1472 port->aggregator->transmit_state = 1;
1473 port->aggregator->lag_ports = port;
1474 port->aggregator->num_of_ports++;
1476 /* mark this port as selected */
1477 port->sm_vars |= AD_PORT_SELECTED;
1479 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1480 port->actor_port_number,
1481 port->aggregator->aggregator_identifier);
1483 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1484 port->actor_port_number, port->slave->dev->name);
1487 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1488 * in all aggregator's ports, else set ready=FALSE in all
1489 * aggregator's ports
1491 __set_agg_ports_ready(port->aggregator,
1492 __agg_ports_are_ready(port->aggregator));
1494 aggregator = __get_first_agg(port);
1495 ad_agg_selection_logic(aggregator, update_slave_arr);
1497 if (!port->aggregator->is_active)
1498 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1501 /* Decide if "agg" is a better choice for the new active aggregator that
1502 * the current best, according to the ad_select policy.
1504 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1505 struct aggregator *curr)
1507 /* 0. If no best, select current.
1509 * 1. If the current agg is not individual, and the best is
1510 * individual, select current.
1512 * 2. If current agg is individual and the best is not, keep best.
1514 * 3. Therefore, current and best are both individual or both not
1517 * 3a. If current agg partner replied, and best agg partner did not,
1520 * 3b. If current agg partner did not reply and best agg partner
1521 * did reply, keep best.
1523 * 4. Therefore, current and best both have partner replies or
1524 * both do not, so perform selection policy:
1526 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1527 * select by bandwidth.
1529 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1534 if (!curr->is_individual && best->is_individual)
1537 if (curr->is_individual && !best->is_individual)
1540 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1543 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1546 switch (__get_agg_selection_mode(curr->lag_ports)) {
1548 if (__agg_active_ports(curr) > __agg_active_ports(best))
1551 if (__agg_active_ports(curr) < __agg_active_ports(best))
1555 case BOND_AD_STABLE:
1556 case BOND_AD_BANDWIDTH:
1557 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1563 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1564 curr->slave->bond->dev->name,
1565 __get_agg_selection_mode(curr->lag_ports));
1572 static int agg_device_up(const struct aggregator *agg)
1574 struct port *port = agg->lag_ports;
1579 for (port = agg->lag_ports; port;
1580 port = port->next_port_in_aggregator) {
1581 if (netif_running(port->slave->dev) &&
1582 netif_carrier_ok(port->slave->dev))
1590 * ad_agg_selection_logic - select an aggregation group for a team
1591 * @aggregator: the aggregator we're looking at
1592 * @update_slave_arr: Does slave array need update?
1594 * It is assumed that only one aggregator may be selected for a team.
1596 * The logic of this function is to select the aggregator according to
1597 * the ad_select policy:
1599 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1600 * it, and to reselect the active aggregator only if the previous
1601 * aggregator has no more ports related to it.
1603 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1604 * bandwidth, and reselect whenever a link state change takes place or the
1605 * set of slaves in the bond changes.
1607 * BOND_AD_COUNT: select the aggregator with largest number of ports
1608 * (slaves), and reselect whenever a link state change takes place or the
1609 * set of slaves in the bond changes.
1611 * FIXME: this function MUST be called with the first agg in the bond, or
1612 * __get_active_agg() won't work correctly. This function should be better
1613 * called with the bond itself, and retrieve the first agg from it.
1615 static void ad_agg_selection_logic(struct aggregator *agg,
1616 bool *update_slave_arr)
1618 struct aggregator *best, *active, *origin;
1619 struct bonding *bond = agg->slave->bond;
1620 struct list_head *iter;
1621 struct slave *slave;
1626 active = __get_active_agg(agg);
1627 best = (active && agg_device_up(active)) ? active : NULL;
1629 bond_for_each_slave_rcu(bond, slave, iter) {
1630 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1634 if (__agg_active_ports(agg) && agg_device_up(agg))
1635 best = ad_agg_selection_test(best, agg);
1639 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1640 /* For the STABLE policy, don't replace the old active
1641 * aggregator if it's still active (it has an answering
1642 * partner) or if both the best and active don't have an
1643 * answering partner.
1645 if (active && active->lag_ports &&
1646 __agg_active_ports(active) &&
1647 (__agg_has_partner(active) ||
1648 (!__agg_has_partner(active) &&
1649 !__agg_has_partner(best)))) {
1650 if (!(!active->actor_oper_aggregator_key &&
1651 best->actor_oper_aggregator_key)) {
1653 active->is_active = 1;
1658 if (best && (best == active)) {
1660 active->is_active = 1;
1663 /* if there is new best aggregator, activate it */
1665 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1666 best->aggregator_identifier, best->num_of_ports,
1667 best->actor_oper_aggregator_key,
1668 best->partner_oper_aggregator_key,
1669 best->is_individual, best->is_active);
1670 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1671 best->lag_ports, best->slave,
1672 best->slave ? best->slave->dev->name : "NULL");
1674 bond_for_each_slave_rcu(bond, slave, iter) {
1675 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1677 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1678 agg->aggregator_identifier, agg->num_of_ports,
1679 agg->actor_oper_aggregator_key,
1680 agg->partner_oper_aggregator_key,
1681 agg->is_individual, agg->is_active);
1684 /* check if any partner replys */
1685 if (best->is_individual) {
1686 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1688 best->slave->bond->dev->name : "NULL");
1691 best->is_active = 1;
1692 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1693 best->aggregator_identifier);
1694 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1695 best->aggregator_identifier, best->num_of_ports,
1696 best->actor_oper_aggregator_key,
1697 best->partner_oper_aggregator_key,
1698 best->is_individual, best->is_active);
1700 /* disable the ports that were related to the former
1704 for (port = active->lag_ports; port;
1705 port = port->next_port_in_aggregator) {
1706 __disable_port(port);
1709 /* Slave array needs update. */
1710 *update_slave_arr = true;
1713 /* if the selected aggregator is of join individuals
1714 * (partner_system is NULL), enable their ports
1716 active = __get_active_agg(origin);
1719 if (!__agg_has_partner(active)) {
1720 for (port = active->lag_ports; port;
1721 port = port->next_port_in_aggregator) {
1722 __enable_port(port);
1729 bond_3ad_set_carrier(bond);
1733 * ad_clear_agg - clear a given aggregator's parameters
1734 * @aggregator: the aggregator we're looking at
1736 static void ad_clear_agg(struct aggregator *aggregator)
1739 aggregator->is_individual = false;
1740 aggregator->actor_admin_aggregator_key = 0;
1741 aggregator->actor_oper_aggregator_key = 0;
1742 aggregator->partner_system = null_mac_addr;
1743 aggregator->partner_system_priority = 0;
1744 aggregator->partner_oper_aggregator_key = 0;
1745 aggregator->receive_state = 0;
1746 aggregator->transmit_state = 0;
1747 aggregator->lag_ports = NULL;
1748 aggregator->is_active = 0;
1749 aggregator->num_of_ports = 0;
1750 pr_debug("LAG %d was cleared\n",
1751 aggregator->aggregator_identifier);
1756 * ad_initialize_agg - initialize a given aggregator's parameters
1757 * @aggregator: the aggregator we're looking at
1759 static void ad_initialize_agg(struct aggregator *aggregator)
1762 ad_clear_agg(aggregator);
1764 aggregator->aggregator_mac_address = null_mac_addr;
1765 aggregator->aggregator_identifier = 0;
1766 aggregator->slave = NULL;
1771 * ad_initialize_port - initialize a given port's parameters
1772 * @aggregator: the aggregator we're looking at
1773 * @lacp_fast: boolean. whether fast periodic should be used
1775 static void ad_initialize_port(struct port *port, int lacp_fast)
1777 static const struct port_params tmpl = {
1778 .system_priority = 0xffff,
1781 .port_priority = 0xff,
1784 static const struct lacpdu lacpdu = {
1786 .version_number = 0x01,
1787 .tlv_type_actor_info = 0x01,
1788 .actor_information_length = 0x14,
1789 .tlv_type_partner_info = 0x02,
1790 .partner_information_length = 0x14,
1791 .tlv_type_collector_info = 0x03,
1792 .collector_information_length = 0x10,
1793 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1797 port->actor_port_priority = 0xff;
1798 port->actor_port_aggregator_identifier = 0;
1800 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1801 AD_STATE_LACP_ACTIVITY;
1802 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1803 AD_STATE_LACP_ACTIVITY;
1806 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1808 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1809 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1811 port->is_enabled = true;
1812 /* private parameters */
1813 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1814 port->sm_rx_state = 0;
1815 port->sm_rx_timer_counter = 0;
1816 port->sm_periodic_state = 0;
1817 port->sm_periodic_timer_counter = 0;
1818 port->sm_mux_state = 0;
1819 port->sm_mux_timer_counter = 0;
1820 port->sm_tx_state = 0;
1821 port->aggregator = NULL;
1822 port->next_port_in_aggregator = NULL;
1823 port->transaction_id = 0;
1825 port->sm_churn_actor_timer_counter = 0;
1826 port->sm_churn_actor_state = 0;
1827 port->churn_actor_count = 0;
1828 port->sm_churn_partner_timer_counter = 0;
1829 port->sm_churn_partner_state = 0;
1830 port->churn_partner_count = 0;
1832 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1837 * ad_enable_collecting_distributing - enable a port's transmit/receive
1838 * @port: the port we're looking at
1839 * @update_slave_arr: Does slave array need update?
1841 * Enable @port if it's in an active aggregator
1843 static void ad_enable_collecting_distributing(struct port *port,
1844 bool *update_slave_arr)
1846 if (port->aggregator->is_active) {
1847 pr_debug("Enabling port %d(LAG %d)\n",
1848 port->actor_port_number,
1849 port->aggregator->aggregator_identifier);
1850 __enable_port(port);
1851 /* Slave array needs update */
1852 *update_slave_arr = true;
1857 * ad_disable_collecting_distributing - disable a port's transmit/receive
1858 * @port: the port we're looking at
1859 * @update_slave_arr: Does slave array need update?
1861 static void ad_disable_collecting_distributing(struct port *port,
1862 bool *update_slave_arr)
1864 if (port->aggregator &&
1865 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1866 &(null_mac_addr))) {
1867 pr_debug("Disabling port %d(LAG %d)\n",
1868 port->actor_port_number,
1869 port->aggregator->aggregator_identifier);
1870 __disable_port(port);
1871 /* Slave array needs an update */
1872 *update_slave_arr = true;
1877 * ad_marker_info_received - handle receive of a Marker information frame
1878 * @marker_info: Marker info received
1879 * @port: the port we're looking at
1881 static void ad_marker_info_received(struct bond_marker *marker_info,
1884 struct bond_marker marker;
1886 /* copy the received marker data to the response marker */
1887 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1888 /* change the marker subtype to marker response */
1889 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1891 /* send the marker response */
1892 if (ad_marker_send(port, &marker) >= 0) {
1893 pr_debug("Sent Marker Response on port %d\n",
1894 port->actor_port_number);
1899 * ad_marker_response_received - handle receive of a marker response frame
1900 * @marker: marker PDU received
1901 * @port: the port we're looking at
1903 * This function does nothing since we decided not to implement send and handle
1904 * response for marker PDU's, in this stage, but only to respond to marker
1907 static void ad_marker_response_received(struct bond_marker *marker,
1910 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1913 /* ========= AD exported functions to the main bonding code ========= */
1915 /* Check aggregators status in team every T seconds */
1916 #define AD_AGGREGATOR_SELECTION_TIMER 8
1919 * bond_3ad_initiate_agg_selection - initate aggregator selection
1920 * @bond: bonding struct
1922 * Set the aggregation selection timer, to initiate an agg selection in
1923 * the very near future. Called during first initialization, and during
1924 * any down to up transitions of the bond.
1926 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1928 BOND_AD_INFO(bond).agg_select_timer = timeout;
1932 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1933 * @bond: bonding struct to work on
1934 * @tick_resolution: tick duration (millisecond resolution)
1936 * Can be called only after the mac address of the bond is set.
1938 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1940 /* check that the bond is not initialized yet */
1941 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1942 bond->dev->dev_addr)) {
1944 BOND_AD_INFO(bond).aggregator_identifier = 0;
1946 BOND_AD_INFO(bond).system.sys_priority =
1947 bond->params.ad_actor_sys_prio;
1948 if (is_zero_ether_addr(bond->params.ad_actor_system))
1949 BOND_AD_INFO(bond).system.sys_mac_addr =
1950 *((struct mac_addr *)bond->dev->dev_addr);
1952 BOND_AD_INFO(bond).system.sys_mac_addr =
1953 *((struct mac_addr *)bond->params.ad_actor_system);
1955 /* initialize how many times this module is called in one
1956 * second (should be about every 100ms)
1958 ad_ticks_per_sec = tick_resolution;
1960 bond_3ad_initiate_agg_selection(bond,
1961 AD_AGGREGATOR_SELECTION_TIMER *
1967 * bond_3ad_bind_slave - initialize a slave's port
1968 * @slave: slave struct to work on
1970 * Returns: 0 on success
1973 void bond_3ad_bind_slave(struct slave *slave)
1975 struct bonding *bond = bond_get_bond_by_slave(slave);
1977 struct aggregator *aggregator;
1979 /* check that the slave has not been initialized yet. */
1980 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1982 /* port initialization */
1983 port = &(SLAVE_AD_INFO(slave)->port);
1985 ad_initialize_port(port, bond->params.lacp_fast);
1987 port->slave = slave;
1988 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
1989 /* key is determined according to the link speed, duplex and
1992 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
1993 ad_update_actor_keys(port, false);
1994 /* actor system is the bond's system */
1995 __ad_actor_update_port(port);
1996 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1997 * lacpdu's are sent in one second)
1999 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
2001 __disable_port(port);
2003 /* aggregator initialization */
2004 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2006 ad_initialize_agg(aggregator);
2008 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2009 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2010 aggregator->slave = slave;
2011 aggregator->is_active = 0;
2012 aggregator->num_of_ports = 0;
2017 * bond_3ad_unbind_slave - deinitialize a slave's port
2018 * @slave: slave struct to work on
2020 * Search for the aggregator that is related to this port, remove the
2021 * aggregator and assign another aggregator for other port related to it
2022 * (if any), and remove the port.
2024 void bond_3ad_unbind_slave(struct slave *slave)
2026 struct port *port, *prev_port, *temp_port;
2027 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2028 int select_new_active_agg = 0;
2029 struct bonding *bond = slave->bond;
2030 struct slave *slave_iter;
2031 struct list_head *iter;
2032 bool dummy_slave_update; /* Ignore this value as caller updates array */
2034 /* Sync against bond_3ad_state_machine_handler() */
2035 spin_lock_bh(&bond->mode_lock);
2036 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2037 port = &(SLAVE_AD_INFO(slave)->port);
2039 /* if slave is null, the whole port is not initialized */
2041 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2046 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2047 aggregator->aggregator_identifier);
2049 /* Tell the partner that this port is not suitable for aggregation */
2050 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2051 __update_lacpdu_from_port(port);
2052 ad_lacpdu_send(port);
2054 /* check if this aggregator is occupied */
2055 if (aggregator->lag_ports) {
2056 /* check if there are other ports related to this aggregator
2057 * except the port related to this slave(thats ensure us that
2058 * there is a reason to search for new aggregator, and that we
2061 if ((aggregator->lag_ports != port) ||
2062 (aggregator->lag_ports->next_port_in_aggregator)) {
2063 /* find new aggregator for the related port(s) */
2064 bond_for_each_slave(bond, slave_iter, iter) {
2065 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2066 /* if the new aggregator is empty, or it is
2067 * connected to our port only
2069 if (!new_aggregator->lag_ports ||
2070 ((new_aggregator->lag_ports == port) &&
2071 !new_aggregator->lag_ports->next_port_in_aggregator))
2075 new_aggregator = NULL;
2077 /* if new aggregator found, copy the aggregator's
2078 * parameters and connect the related lag_ports to the
2081 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2082 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2083 aggregator->aggregator_identifier,
2084 new_aggregator->aggregator_identifier);
2086 if ((new_aggregator->lag_ports == port) &&
2087 new_aggregator->is_active) {
2088 netdev_info(bond->dev, "Removing an active aggregator\n");
2089 select_new_active_agg = 1;
2092 new_aggregator->is_individual = aggregator->is_individual;
2093 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2094 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2095 new_aggregator->partner_system = aggregator->partner_system;
2096 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2097 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2098 new_aggregator->receive_state = aggregator->receive_state;
2099 new_aggregator->transmit_state = aggregator->transmit_state;
2100 new_aggregator->lag_ports = aggregator->lag_ports;
2101 new_aggregator->is_active = aggregator->is_active;
2102 new_aggregator->num_of_ports = aggregator->num_of_ports;
2104 /* update the information that is written on
2105 * the ports about the aggregator
2107 for (temp_port = aggregator->lag_ports; temp_port;
2108 temp_port = temp_port->next_port_in_aggregator) {
2109 temp_port->aggregator = new_aggregator;
2110 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2113 ad_clear_agg(aggregator);
2115 if (select_new_active_agg)
2116 ad_agg_selection_logic(__get_first_agg(port),
2117 &dummy_slave_update);
2119 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2122 /* in case that the only port related to this
2123 * aggregator is the one we want to remove
2125 select_new_active_agg = aggregator->is_active;
2126 ad_clear_agg(aggregator);
2127 if (select_new_active_agg) {
2128 netdev_info(bond->dev, "Removing an active aggregator\n");
2129 /* select new active aggregator */
2130 temp_aggregator = __get_first_agg(port);
2131 if (temp_aggregator)
2132 ad_agg_selection_logic(temp_aggregator,
2133 &dummy_slave_update);
2138 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
2140 /* find the aggregator that this port is connected to */
2141 bond_for_each_slave(bond, slave_iter, iter) {
2142 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2144 /* search the port in the aggregator's related ports */
2145 for (temp_port = temp_aggregator->lag_ports; temp_port;
2146 prev_port = temp_port,
2147 temp_port = temp_port->next_port_in_aggregator) {
2148 if (temp_port == port) {
2149 /* the aggregator found - detach the port from
2153 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2155 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2156 temp_aggregator->num_of_ports--;
2157 if (__agg_active_ports(temp_aggregator) == 0) {
2158 select_new_active_agg = temp_aggregator->is_active;
2159 ad_clear_agg(temp_aggregator);
2160 if (select_new_active_agg) {
2161 netdev_info(bond->dev, "Removing an active aggregator\n");
2162 /* select new active aggregator */
2163 ad_agg_selection_logic(__get_first_agg(port),
2164 &dummy_slave_update);
2174 spin_unlock_bh(&bond->mode_lock);
2178 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2179 * @bond: bonding struct to work on
2181 * If an ad_actor setting gets changed we need to update the individual port
2182 * settings so the bond device will use the new values when it gets upped.
2184 void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2186 struct list_head *iter;
2187 struct slave *slave;
2191 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2192 if (is_zero_ether_addr(bond->params.ad_actor_system))
2193 BOND_AD_INFO(bond).system.sys_mac_addr =
2194 *((struct mac_addr *)bond->dev->dev_addr);
2196 BOND_AD_INFO(bond).system.sys_mac_addr =
2197 *((struct mac_addr *)bond->params.ad_actor_system);
2199 spin_lock_bh(&bond->mode_lock);
2200 bond_for_each_slave(bond, slave, iter) {
2201 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2203 __ad_actor_update_port(port);
2206 spin_unlock_bh(&bond->mode_lock);
2210 * bond_3ad_state_machine_handler - handle state machines timeout
2211 * @bond: bonding struct to work on
2213 * The state machine handling concept in this module is to check every tick
2214 * which state machine should operate any function. The execution order is
2215 * round robin, so when we have an interaction between state machines, the
2216 * reply of one to each other might be delayed until next tick.
2218 * This function also complete the initialization when the agg_select_timer
2219 * times out, and it selects an aggregator for the ports that are yet not
2220 * related to any aggregator, and selects the active aggregator for a bond.
2222 void bond_3ad_state_machine_handler(struct work_struct *work)
2224 struct bonding *bond = container_of(work, struct bonding,
2226 struct aggregator *aggregator;
2227 struct list_head *iter;
2228 struct slave *slave;
2230 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2231 bool update_slave_arr = false;
2233 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2234 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2235 * concurrently due to incoming LACPDU as well.
2237 spin_lock_bh(&bond->mode_lock);
2240 /* check if there are any slaves */
2241 if (!bond_has_slaves(bond))
2244 /* check if agg_select_timer timer after initialize is timed out */
2245 if (BOND_AD_INFO(bond).agg_select_timer &&
2246 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2247 slave = bond_first_slave_rcu(bond);
2248 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2250 /* select the active aggregator for the bond */
2253 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2258 aggregator = __get_first_agg(port);
2259 ad_agg_selection_logic(aggregator, &update_slave_arr);
2261 bond_3ad_set_carrier(bond);
2264 /* for each port run the state machines */
2265 bond_for_each_slave_rcu(bond, slave, iter) {
2266 port = &(SLAVE_AD_INFO(slave)->port);
2268 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2273 ad_rx_machine(NULL, port);
2274 ad_periodic_machine(port);
2275 ad_port_selection_logic(port, &update_slave_arr);
2276 ad_mux_machine(port, &update_slave_arr);
2277 ad_tx_machine(port);
2278 ad_churn_machine(port);
2280 /* turn off the BEGIN bit, since we already handled it */
2281 if (port->sm_vars & AD_PORT_BEGIN)
2282 port->sm_vars &= ~AD_PORT_BEGIN;
2286 bond_for_each_slave_rcu(bond, slave, iter) {
2287 if (slave->should_notify) {
2288 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2293 spin_unlock_bh(&bond->mode_lock);
2295 if (update_slave_arr)
2296 bond_slave_arr_work_rearm(bond, 0);
2298 if (should_notify_rtnl && rtnl_trylock()) {
2299 bond_slave_state_notify(bond);
2302 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2306 * bond_3ad_rx_indication - handle a received frame
2307 * @lacpdu: received lacpdu
2308 * @slave: slave struct to work on
2309 * @length: length of the data received
2311 * It is assumed that frames that were sent on this NIC don't returned as new
2312 * received frames (loopback). Since only the payload is given to this
2313 * function, it check for loopback.
2315 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2319 int ret = RX_HANDLER_ANOTHER;
2321 if (length >= sizeof(struct lacpdu)) {
2323 port = &(SLAVE_AD_INFO(slave)->port);
2326 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2327 slave->dev->name, slave->bond->dev->name);
2331 switch (lacpdu->subtype) {
2332 case AD_TYPE_LACPDU:
2333 ret = RX_HANDLER_CONSUMED;
2334 netdev_dbg(slave->bond->dev,
2335 "Received LACPDU on port %d slave %s\n",
2336 port->actor_port_number,
2338 /* Protect against concurrent state machines */
2339 spin_lock(&slave->bond->mode_lock);
2340 ad_rx_machine(lacpdu, port);
2341 spin_unlock(&slave->bond->mode_lock);
2344 case AD_TYPE_MARKER:
2345 ret = RX_HANDLER_CONSUMED;
2346 /* No need to convert fields to Little Endian since we
2347 * don't use the marker's fields.
2350 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2351 case AD_MARKER_INFORMATION_SUBTYPE:
2352 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2353 port->actor_port_number);
2354 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2357 case AD_MARKER_RESPONSE_SUBTYPE:
2358 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2359 port->actor_port_number);
2360 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2364 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2365 port->actor_port_number);
2373 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2374 * its current speed and duplex settings.
2376 * @port: the port we'are looking at
2377 * @reset: Boolean to just reset the speed and the duplex part of the key
2379 * The logic to change the oper / admin keys is:
2380 * (a) A full duplex port can participate in LACP with partner.
2381 * (b) When the speed is changed, LACP need to be reinitiated.
2383 static void ad_update_actor_keys(struct port *port, bool reset)
2386 u16 ospeed = 0, speed = 0;
2387 u16 old_oper_key = port->actor_oper_port_key;
2389 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2391 speed = __get_link_speed(port);
2392 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2393 duplex = __get_duplex(port);
2394 port->actor_admin_port_key |= (speed << 1) | duplex;
2396 port->actor_oper_port_key = port->actor_admin_port_key;
2398 if (old_oper_key != port->actor_oper_port_key) {
2399 /* Only 'duplex' port participates in LACP */
2401 port->sm_vars |= AD_PORT_LACP_ENABLED;
2403 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2407 netdev_err(port->slave->dev,
2408 "speed changed to 0 for port %s",
2409 port->slave->dev->name);
2410 } else if (duplex && ospeed != speed) {
2411 /* Speed change restarts LACP state-machine */
2412 port->sm_vars |= AD_PORT_BEGIN;
2419 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2422 * @slave: slave struct to work on
2424 * Handle reselection of aggregator (if needed) for this port.
2426 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2430 port = &(SLAVE_AD_INFO(slave)->port);
2432 /* if slave is null, the whole port is not initialized */
2434 netdev_warn(slave->bond->dev,
2435 "speed/duplex changed for uninitialized port %s\n",
2440 spin_lock_bh(&slave->bond->mode_lock);
2441 ad_update_actor_keys(port, false);
2442 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
2443 port->actor_port_number, slave->dev->name);
2444 spin_unlock_bh(&slave->bond->mode_lock);
2448 * bond_3ad_handle_link_change - handle a slave's link status change indication
2449 * @slave: slave struct to work on
2450 * @status: whether the link is now up or down
2452 * Handle reselection of aggregator (if needed) for this port.
2454 void bond_3ad_handle_link_change(struct slave *slave, char link)
2456 struct aggregator *agg;
2460 port = &(SLAVE_AD_INFO(slave)->port);
2462 /* if slave is null, the whole port is not initialized */
2464 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2469 spin_lock_bh(&slave->bond->mode_lock);
2470 /* on link down we are zeroing duplex and speed since
2471 * some of the adaptors(ce1000.lan) report full duplex/speed
2472 * instead of N/A(duplex) / 0(speed).
2474 * on link up we are forcing recheck on the duplex and speed since
2475 * some of he adaptors(ce1000.lan) report.
2477 if (link == BOND_LINK_UP) {
2478 port->is_enabled = true;
2479 ad_update_actor_keys(port, false);
2481 /* link has failed */
2482 port->is_enabled = false;
2483 ad_update_actor_keys(port, true);
2485 agg = __get_first_agg(port);
2486 ad_agg_selection_logic(agg, &dummy);
2488 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2489 port->actor_port_number,
2490 link == BOND_LINK_UP ? "UP" : "DOWN");
2492 spin_unlock_bh(&slave->bond->mode_lock);
2494 /* RTNL is held and mode_lock is released so it's safe
2495 * to update slave_array here.
2497 bond_update_slave_arr(slave->bond, NULL);
2501 * bond_3ad_set_carrier - set link state for bonding master
2502 * @bond - bonding structure
2504 * if we have an active aggregator, we're up, if not, we're down.
2505 * Presumes that we cannot have an active aggregator if there are
2506 * no slaves with link up.
2508 * This behavior complies with IEEE 802.3 section 43.3.9.
2510 * Called by bond_set_carrier(). Return zero if carrier state does not
2511 * change, nonzero if it does.
2513 int bond_3ad_set_carrier(struct bonding *bond)
2515 struct aggregator *active;
2516 struct slave *first_slave;
2520 first_slave = bond_first_slave_rcu(bond);
2525 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2527 /* are enough slaves available to consider link up? */
2528 if (__agg_active_ports(active) < bond->params.min_links) {
2529 if (netif_carrier_ok(bond->dev)) {
2530 netif_carrier_off(bond->dev);
2533 } else if (!netif_carrier_ok(bond->dev)) {
2534 netif_carrier_on(bond->dev);
2537 } else if (netif_carrier_ok(bond->dev)) {
2538 netif_carrier_off(bond->dev);
2546 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2547 * @bond: bonding struct to work on
2548 * @ad_info: ad_info struct to fill with the bond's info
2550 * Returns: 0 on success
2553 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2554 struct ad_info *ad_info)
2556 struct aggregator *aggregator = NULL;
2557 struct list_head *iter;
2558 struct slave *slave;
2561 bond_for_each_slave_rcu(bond, slave, iter) {
2562 port = &(SLAVE_AD_INFO(slave)->port);
2563 if (port->aggregator && port->aggregator->is_active) {
2564 aggregator = port->aggregator;
2572 ad_info->aggregator_id = aggregator->aggregator_identifier;
2573 ad_info->ports = aggregator->num_of_ports;
2574 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2575 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2576 ether_addr_copy(ad_info->partner_system,
2577 aggregator->partner_system.mac_addr_value);
2581 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2586 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2592 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2593 struct slave *slave)
2595 struct lacpdu *lacpdu, _lacpdu;
2597 if (skb->protocol != PKT_TYPE_LACPDU)
2598 return RX_HANDLER_ANOTHER;
2600 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2601 return RX_HANDLER_ANOTHER;
2603 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2605 return RX_HANDLER_ANOTHER;
2607 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
2611 * bond_3ad_update_lacp_rate - change the lacp rate
2612 * @bond - bonding struct
2614 * When modify lacp_rate parameter via sysfs,
2615 * update actor_oper_port_state of each port.
2617 * Hold bond->mode_lock,
2618 * so we can modify port->actor_oper_port_state,
2619 * no matter bond is up or down.
2621 void bond_3ad_update_lacp_rate(struct bonding *bond)
2623 struct port *port = NULL;
2624 struct list_head *iter;
2625 struct slave *slave;
2628 lacp_fast = bond->params.lacp_fast;
2629 spin_lock_bh(&bond->mode_lock);
2630 bond_for_each_slave(bond, slave, iter) {
2631 port = &(SLAVE_AD_INFO(slave)->port);
2633 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2635 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2637 spin_unlock_bh(&bond->mode_lock);