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>
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 802.3ad standard)
61 #define AD_PORT_BEGIN 0x1
62 #define AD_PORT_LACP_ENABLED 0x2
63 #define AD_PORT_ACTOR_CHURN 0x4
64 #define AD_PORT_PARTNER_CHURN 0x8
65 #define AD_PORT_READY 0x10
66 #define AD_PORT_READY_N 0x20
67 #define AD_PORT_MATCHED 0x40
68 #define AD_PORT_STANDBY 0x80
69 #define AD_PORT_SELECTED 0x100
70 #define AD_PORT_MOVED 0x200
72 // Port Key definitions
73 // key is determined according to the link speed, duplex and
74 // user key(which is yet not supported)
75 // ------------------------------------------------------------
76 // Port key : | User key | Speed |Duplex|
77 // ------------------------------------------------------------
79 #define AD_DUPLEX_KEY_BITS 0x1
80 #define AD_SPEED_KEY_BITS 0x3E
81 #define AD_USER_KEY_BITS 0xFFC0
84 #define AD_LINK_SPEED_BITMASK_1MBPS 0x1
85 #define AD_LINK_SPEED_BITMASK_10MBPS 0x2
86 #define AD_LINK_SPEED_BITMASK_100MBPS 0x4
87 #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
88 #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
91 // compare MAC addresses
92 #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
94 static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}};
95 static u16 ad_ticks_per_sec;
96 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
98 // ================= 3AD api to bonding and kernel code ==================
99 static u16 __get_link_speed(struct port *port);
100 static u8 __get_duplex(struct port *port);
101 static inline void __initialize_port_locks(struct port *port);
103 static u16 __ad_timer_to_ticks(u16 timer_type, u16 Par);
106 // ================= ad code helper functions ==================
107 //needed by ad_rx_machine(...)
108 static void __record_pdu(struct lacpdu *lacpdu, struct port *port);
109 static void __record_default(struct port *port);
110 static void __update_selected(struct lacpdu *lacpdu, struct port *port);
111 static void __update_default_selected(struct port *port);
112 static void __choose_matched(struct lacpdu *lacpdu, struct port *port);
113 static void __update_ntt(struct lacpdu *lacpdu, struct port *port);
115 //needed for ad_mux_machine(..)
116 static void __attach_bond_to_agg(struct port *port);
117 static void __detach_bond_from_agg(struct port *port);
118 static int __agg_ports_are_ready(struct aggregator *aggregator);
119 static void __set_agg_ports_ready(struct aggregator *aggregator, int val);
121 //needed for ad_agg_selection_logic(...)
122 static u32 __get_agg_bandwidth(struct aggregator *aggregator);
123 static struct aggregator *__get_active_agg(struct aggregator *aggregator);
126 // ================= main 802.3ad protocol functions ==================
127 static int ad_lacpdu_send(struct port *port);
128 static int ad_marker_send(struct port *port, struct bond_marker *marker);
129 static void ad_mux_machine(struct port *port);
130 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
131 static void ad_tx_machine(struct port *port);
132 static void ad_periodic_machine(struct port *port);
133 static void ad_port_selection_logic(struct port *port);
134 static void ad_agg_selection_logic(struct aggregator *aggregator);
135 static void ad_clear_agg(struct aggregator *aggregator);
136 static void ad_initialize_agg(struct aggregator *aggregator);
137 static void ad_initialize_port(struct port *port, int lacp_fast);
138 static void ad_initialize_lacpdu(struct lacpdu *Lacpdu);
139 static void ad_enable_collecting_distributing(struct port *port);
140 static void ad_disable_collecting_distributing(struct port *port);
141 static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
142 static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
145 /////////////////////////////////////////////////////////////////////////////////
146 // ================= api to bonding and kernel code ==================
147 /////////////////////////////////////////////////////////////////////////////////
150 * __get_bond_by_port - get the port's bonding struct
151 * @port: the port we're looking at
153 * Return @port's bonding struct, or %NULL if it can't be found.
155 static inline struct bonding *__get_bond_by_port(struct port *port)
157 if (port->slave == NULL) {
161 return bond_get_bond_by_slave(port->slave);
165 * __get_first_port - get the first port in the bond
166 * @bond: the bond we're looking at
168 * Return the port of the first slave in @bond, or %NULL if it can't be found.
170 static inline struct port *__get_first_port(struct bonding *bond)
172 if (bond->slave_cnt == 0) {
176 return &(SLAVE_AD_INFO(bond->first_slave).port);
180 * __get_next_port - get the next port in the bond
181 * @port: the port we're looking at
183 * Return the port of the slave that is next in line of @port's slave in the
184 * bond, or %NULL if it can't be found.
186 static inline struct port *__get_next_port(struct port *port)
188 struct bonding *bond = __get_bond_by_port(port);
189 struct slave *slave = port->slave;
191 // If there's no bond for this port, or this is the last slave
192 if ((bond == NULL) || (slave->next == bond->first_slave)) {
196 return &(SLAVE_AD_INFO(slave->next).port);
200 * __get_first_agg - get the first aggregator in the bond
201 * @bond: the bond we're looking at
203 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
206 static inline struct aggregator *__get_first_agg(struct port *port)
208 struct bonding *bond = __get_bond_by_port(port);
210 // If there's no bond for this port, or bond has no slaves
211 if ((bond == NULL) || (bond->slave_cnt == 0)) {
215 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
219 * __get_next_agg - get the next aggregator in the bond
220 * @aggregator: the aggregator we're looking at
222 * Return the aggregator of the slave that is next in line of @aggregator's
223 * slave in the bond, or %NULL if it can't be found.
225 static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
227 struct slave *slave = aggregator->slave;
228 struct bonding *bond = bond_get_bond_by_slave(slave);
230 // If there's no bond for this aggregator, or this is the last slave
231 if ((bond == NULL) || (slave->next == bond->first_slave)) {
235 return &(SLAVE_AD_INFO(slave->next).aggregator);
241 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
242 * address for the partner). Return 0 if not.
244 static inline int __agg_has_partner(struct aggregator *agg)
246 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
250 * __disable_port - disable the port's slave
251 * @port: the port we're looking at
254 static inline void __disable_port(struct port *port)
256 bond_set_slave_inactive_flags(port->slave);
260 * __enable_port - enable the port's slave, if it's up
261 * @port: the port we're looking at
264 static inline void __enable_port(struct port *port)
266 struct slave *slave = port->slave;
268 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) {
269 bond_set_slave_active_flags(slave);
274 * __port_is_enabled - check if the port's slave is in active state
275 * @port: the port we're looking at
278 static inline int __port_is_enabled(struct port *port)
280 return(port->slave->state == BOND_STATE_ACTIVE);
284 * __get_agg_selection_mode - get the aggregator selection mode
285 * @port: the port we're looking at
287 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
289 static inline u32 __get_agg_selection_mode(struct port *port)
291 struct bonding *bond = __get_bond_by_port(port);
294 return BOND_AD_STABLE;
297 return BOND_AD_INFO(bond).agg_select_mode;
301 * __check_agg_selection_timer - check if the selection timer has expired
302 * @port: the port we're looking at
305 static inline int __check_agg_selection_timer(struct port *port)
307 struct bonding *bond = __get_bond_by_port(port);
313 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
317 * __get_rx_machine_lock - lock the port's RX machine
318 * @port: the port we're looking at
321 static inline void __get_rx_machine_lock(struct port *port)
323 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
327 * __release_rx_machine_lock - unlock the port's RX machine
328 * @port: the port we're looking at
331 static inline void __release_rx_machine_lock(struct port *port)
333 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
337 * __get_link_speed - get a port's speed
338 * @port: the port we're looking at
340 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
342 * %AD_LINK_SPEED_BITMASK_10MBPS,
343 * %AD_LINK_SPEED_BITMASK_100MBPS,
344 * %AD_LINK_SPEED_BITMASK_1000MBPS,
345 * %AD_LINK_SPEED_BITMASK_10000MBPS
347 static u16 __get_link_speed(struct port *port)
349 struct slave *slave = port->slave;
352 /* this if covers only a special case: when the configuration starts with
353 * link down, it sets the speed to 0.
354 * This is done in spite of the fact that the e100 driver reports 0 to be
355 * compatible with MVT in the future.*/
356 if (slave->link != BOND_LINK_UP) {
359 switch (slave->speed) {
361 speed = AD_LINK_SPEED_BITMASK_10MBPS;
365 speed = AD_LINK_SPEED_BITMASK_100MBPS;
369 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
373 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
377 speed = 0; // unknown speed value from ethtool. shouldn't happen
382 pr_debug("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed);
387 * __get_duplex - get a port's duplex
388 * @port: the port we're looking at
390 * Return @port's duplex in 802.3ad bitmask format. i.e.:
391 * 0x01 if in full duplex
394 static u8 __get_duplex(struct port *port)
396 struct slave *slave = port->slave;
400 // handling a special case: when the configuration starts with
401 // link down, it sets the duplex to 0.
402 if (slave->link != BOND_LINK_UP) {
405 switch (slave->duplex) {
408 pr_debug("Port %d Received status full duplex update from adapter\n", port->actor_port_number);
413 pr_debug("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number);
421 * __initialize_port_locks - initialize a port's RX machine spinlock
422 * @port: the port we're looking at
425 static inline void __initialize_port_locks(struct port *port)
427 // make sure it isn't called twice
428 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
434 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
435 * @timer_type: which timer to operate
436 * @par: timer parameter. see below
438 * If @timer_type is %current_while_timer, @par indicates long/short timer.
439 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
440 * %SLOW_PERIODIC_TIME.
442 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
444 u16 retval=0; //to silence the compiler
446 switch (timer_type) {
447 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
448 if (par) { // for short or long timeout
449 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
451 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
454 case AD_ACTOR_CHURN_TIMER: // for local churn machine
455 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
457 case AD_PERIODIC_TIMER: // for periodic machine
458 retval = (par*ad_ticks_per_sec); // long timeout
460 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
461 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
463 case AD_WAIT_WHILE_TIMER: // for selection machine
464 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
471 /////////////////////////////////////////////////////////////////////////////////
472 // ================= ad_rx_machine helper functions ==================
473 /////////////////////////////////////////////////////////////////////////////////
476 * __record_pdu - record parameters from a received lacpdu
477 * @lacpdu: the lacpdu we've received
478 * @port: the port we're looking at
480 * Record the parameter values for the Actor carried in a received lacpdu as
481 * the current partner operational parameter values and sets
482 * actor_oper_port_state.defaulted to FALSE.
484 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
486 if (lacpdu && port) {
487 struct port_params *partner = &port->partner_oper;
489 // record the new parameter values for the partner operational
490 partner->port_number = ntohs(lacpdu->actor_port);
491 partner->port_priority = ntohs(lacpdu->actor_port_priority);
492 partner->system = lacpdu->actor_system;
493 partner->system_priority = ntohs(lacpdu->actor_system_priority);
494 partner->key = ntohs(lacpdu->actor_key);
495 partner->port_state = lacpdu->actor_state;
497 // set actor_oper_port_state.defaulted to FALSE
498 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
500 // set the partner sync. to on if the partner is sync. and the port is matched
501 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
502 partner->port_state |= AD_STATE_SYNCHRONIZATION;
504 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
510 * __record_default - record default parameters
511 * @port: the port we're looking at
513 * This function records the default parameter values for the partner carried
514 * in the Partner Admin parameters as the current partner operational parameter
515 * values and sets actor_oper_port_state.defaulted to TRUE.
517 static void __record_default(struct port *port)
520 // record the partner admin parameters
521 memcpy(&port->partner_oper, &port->partner_admin,
522 sizeof(struct port_params));
524 // set actor_oper_port_state.defaulted to true
525 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
530 * __update_selected - update a port's Selected variable from a received lacpdu
531 * @lacpdu: the lacpdu we've received
532 * @port: the port we're looking at
534 * Update the value of the selected variable, using parameter values from a
535 * newly received lacpdu. The parameter values for the Actor carried in the
536 * received PDU are compared with the corresponding operational parameter
537 * values for the ports partner. If one or more of the comparisons shows that
538 * the value(s) received in the PDU differ from the current operational values,
539 * then selected is set to FALSE and actor_oper_port_state.synchronization is
540 * set to out_of_sync. Otherwise, selected remains unchanged.
542 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
544 // validate lacpdu and port
545 if (lacpdu && port) {
546 // check if any parameter is different
547 if ((ntohs(lacpdu->actor_port) != port->partner_oper.port_number) ||
548 (ntohs(lacpdu->actor_port_priority) != port->partner_oper.port_priority) ||
549 MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper.system)) ||
550 (ntohs(lacpdu->actor_system_priority) != port->partner_oper.system_priority) ||
551 (ntohs(lacpdu->actor_key) != port->partner_oper.key) ||
552 ((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper.port_state & AD_STATE_AGGREGATION))
554 // update the state machine Selected variable
555 port->sm_vars &= ~AD_PORT_SELECTED;
561 * __update_default_selected - update a port's Selected variable from Partner
562 * @port: the port we're looking at
564 * This function updates the value of the selected variable, using the partner
565 * administrative parameter values. The administrative values are compared with
566 * the corresponding operational parameter values for the partner. If one or
567 * more of the comparisons shows that the administrative value(s) differ from
568 * the current operational values, then Selected is set to FALSE and
569 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
570 * Selected remains unchanged.
572 static void __update_default_selected(struct port *port)
576 // check if any parameter is different
577 if ((port->partner_admin.port_number != port->partner_oper.port_number) ||
578 (port->partner_admin.port_priority != port->partner_oper.port_priority) ||
579 MAC_ADDRESS_COMPARE(&(port->partner_admin.system), &(port->partner_oper.system)) ||
580 (port->partner_admin.system_priority != port->partner_oper.system_priority) ||
581 (port->partner_admin.key != port->partner_oper.key) ||
582 ((port->partner_admin.port_state & AD_STATE_AGGREGATION) != (port->partner_oper.port_state & AD_STATE_AGGREGATION))
584 // update the state machine Selected variable
585 port->sm_vars &= ~AD_PORT_SELECTED;
591 * __choose_matched - update a port's matched variable from a received lacpdu
592 * @lacpdu: the lacpdu we've received
593 * @port: the port we're looking at
595 * Update the value of the matched variable, using parameter values from a
596 * newly received lacpdu. Parameter values for the partner carried in the
597 * received PDU are compared with the corresponding operational parameter
598 * values for the actor. Matched is set to TRUE if all of these parameters
599 * match and the PDU parameter partner_state.aggregation has the same value as
600 * actor_oper_port_state.aggregation and lacp will actively maintain the link
601 * in the aggregation. Matched is also set to TRUE if the value of
602 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
603 * an individual link and lacp will actively maintain the link. Otherwise,
604 * matched is set to FALSE. LACP is considered to be actively maintaining the
605 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
606 * the actor's actor_oper_port_state.lacp_activity and the PDU's
607 * partner_state.lacp_activity variables are TRUE.
609 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
611 // validate lacpdu and port
612 if (lacpdu && port) {
613 // check if all parameters are alike
614 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
615 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
616 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
617 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
618 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
619 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
620 // or this is individual link(aggregation == FALSE)
621 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
623 // update the state machine Matched variable
624 port->sm_vars |= AD_PORT_MATCHED;
626 port->sm_vars &= ~AD_PORT_MATCHED;
632 * __update_ntt - update a port's ntt variable from a received lacpdu
633 * @lacpdu: the lacpdu we've received
634 * @port: the port we're looking at
636 * Updates the value of the ntt variable, using parameter values from a newly
637 * received lacpdu. The parameter values for the partner carried in the
638 * received PDU are compared with the corresponding operational parameter
639 * values for the Actor. If one or more of the comparisons shows that the
640 * value(s) received in the PDU differ from the current operational values,
641 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
643 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
645 // validate lacpdu and port
646 if (lacpdu && port) {
647 // check if any parameter is different
648 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
649 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
650 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
651 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
652 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
653 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
654 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
655 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
656 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
658 // set ntt to be TRUE
665 * __attach_bond_to_agg
666 * @port: the port we're looking at
668 * Handle the attaching of the port's control parser/multiplexer and the
669 * aggregator. This function does nothing since the parser/multiplexer of the
670 * receive and the parser/multiplexer of the aggregator are already combined.
672 static void __attach_bond_to_agg(struct port *port)
674 port=NULL; // just to satisfy the compiler
675 // This function does nothing since the parser/multiplexer of the receive
676 // and the parser/multiplexer of the aggregator are already combined
680 * __detach_bond_from_agg
681 * @port: the port we're looking at
683 * Handle the detaching of the port's control parser/multiplexer from the
684 * aggregator. This function does nothing since the parser/multiplexer of the
685 * receive and the parser/multiplexer of the aggregator are already combined.
687 static void __detach_bond_from_agg(struct port *port)
689 port=NULL; // just to satisfy the compiler
690 // This function does nothing sience the parser/multiplexer of the receive
691 // and the parser/multiplexer of the aggregator are already combined
695 * __agg_ports_are_ready - check if all ports in an aggregator are ready
696 * @aggregator: the aggregator we're looking at
699 static int __agg_ports_are_ready(struct aggregator *aggregator)
705 // scan all ports in this aggregator to verfy if they are all ready
706 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
707 if (!(port->sm_vars & AD_PORT_READY_N)) {
718 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
719 * @aggregator: the aggregator we're looking at
720 * @val: Should the ports' ready bit be set on or off
723 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
727 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
729 port->sm_vars |= AD_PORT_READY;
731 port->sm_vars &= ~AD_PORT_READY;
737 * __get_agg_bandwidth - get the total bandwidth of an aggregator
738 * @aggregator: the aggregator we're looking at
741 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
746 if (aggregator->num_of_ports) {
747 basic_speed = __get_link_speed(aggregator->lag_ports);
748 switch (basic_speed) {
749 case AD_LINK_SPEED_BITMASK_1MBPS:
750 bandwidth = aggregator->num_of_ports;
752 case AD_LINK_SPEED_BITMASK_10MBPS:
753 bandwidth = aggregator->num_of_ports * 10;
755 case AD_LINK_SPEED_BITMASK_100MBPS:
756 bandwidth = aggregator->num_of_ports * 100;
758 case AD_LINK_SPEED_BITMASK_1000MBPS:
759 bandwidth = aggregator->num_of_ports * 1000;
761 case AD_LINK_SPEED_BITMASK_10000MBPS:
762 bandwidth = aggregator->num_of_ports * 10000;
765 bandwidth=0; // to silent the compilor ....
772 * __get_active_agg - get the current active aggregator
773 * @aggregator: the aggregator we're looking at
776 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
778 struct aggregator *retval = NULL;
780 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
781 if (aggregator->is_active) {
791 * __update_lacpdu_from_port - update a port's lacpdu fields
792 * @port: the port we're looking at
795 static inline void __update_lacpdu_from_port(struct port *port)
797 struct lacpdu *lacpdu = &port->lacpdu;
799 /* update current actual Actor parameters */
800 /* lacpdu->subtype initialized
801 * lacpdu->version_number initialized
802 * lacpdu->tlv_type_actor_info initialized
803 * lacpdu->actor_information_length initialized
806 lacpdu->actor_system_priority = htons(port->actor_system_priority);
807 lacpdu->actor_system = port->actor_system;
808 lacpdu->actor_key = htons(port->actor_oper_port_key);
809 lacpdu->actor_port_priority = htons(port->actor_port_priority);
810 lacpdu->actor_port = htons(port->actor_port_number);
811 lacpdu->actor_state = port->actor_oper_port_state;
813 /* lacpdu->reserved_3_1 initialized
814 * lacpdu->tlv_type_partner_info initialized
815 * lacpdu->partner_information_length initialized
818 lacpdu->partner_system_priority = htons(port->partner_oper.system_priority);
819 lacpdu->partner_system = port->partner_oper.system;
820 lacpdu->partner_key = htons(port->partner_oper.key);
821 lacpdu->partner_port_priority = htons(port->partner_oper.port_priority);
822 lacpdu->partner_port = htons(port->partner_oper.port_number);
823 lacpdu->partner_state = port->partner_oper.port_state;
825 /* lacpdu->reserved_3_2 initialized
826 * lacpdu->tlv_type_collector_info initialized
827 * lacpdu->collector_information_length initialized
828 * collector_max_delay initialized
829 * reserved_12[12] initialized
830 * tlv_type_terminator initialized
831 * terminator_length initialized
832 * reserved_50[50] initialized
836 //////////////////////////////////////////////////////////////////////////////////////
837 // ================= main 802.3ad protocol code ======================================
838 //////////////////////////////////////////////////////////////////////////////////////
841 * ad_lacpdu_send - send out a lacpdu packet on a given port
842 * @port: the port we're looking at
844 * Returns: 0 on success
847 static int ad_lacpdu_send(struct port *port)
849 struct slave *slave = port->slave;
851 struct lacpdu_header *lacpdu_header;
852 int length = sizeof(struct lacpdu_header);
853 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
855 skb = dev_alloc_skb(length);
860 skb->dev = slave->dev;
861 skb_reset_mac_header(skb);
862 skb->network_header = skb->mac_header + ETH_HLEN;
863 skb->protocol = PKT_TYPE_LACPDU;
864 skb->priority = TC_PRIO_CONTROL;
866 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
868 lacpdu_header->ad_header.destination_address = lacpdu_multicast_address;
869 /* Note: source addres is set to be the member's PERMANENT address, because we use it
870 to identify loopback lacpdus in receive. */
871 lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
872 lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU;
874 lacpdu_header->lacpdu = port->lacpdu; // struct copy
882 * ad_marker_send - send marker information/response on a given port
883 * @port: the port we're looking at
884 * @marker: marker data to send
886 * Returns: 0 on success
889 static int ad_marker_send(struct port *port, struct bond_marker *marker)
891 struct slave *slave = port->slave;
893 struct bond_marker_header *marker_header;
894 int length = sizeof(struct bond_marker_header);
895 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
897 skb = dev_alloc_skb(length + 16);
902 skb_reserve(skb, 16);
904 skb->dev = slave->dev;
905 skb_reset_mac_header(skb);
906 skb->network_header = skb->mac_header + ETH_HLEN;
907 skb->protocol = PKT_TYPE_LACPDU;
909 marker_header = (struct bond_marker_header *)skb_put(skb, length);
911 marker_header->ad_header.destination_address = lacpdu_multicast_address;
912 /* Note: source addres is set to be the member's PERMANENT address, because we use it
913 to identify loopback MARKERs in receive. */
914 marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
915 marker_header->ad_header.length_type = PKT_TYPE_LACPDU;
917 marker_header->marker = *marker; // struct copy
925 * ad_mux_machine - handle a port's mux state machine
926 * @port: the port we're looking at
929 static void ad_mux_machine(struct port *port)
931 mux_states_t last_state;
933 // keep current State Machine state to compare later if it was changed
934 last_state = port->sm_mux_state;
936 if (port->sm_vars & AD_PORT_BEGIN) {
937 port->sm_mux_state = AD_MUX_DETACHED; // next state
939 switch (port->sm_mux_state) {
940 case AD_MUX_DETACHED:
941 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY
942 port->sm_mux_state = AD_MUX_WAITING; // next state
946 // if SELECTED == FALSE return to DETACH state
947 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
948 port->sm_vars &= ~AD_PORT_READY_N;
949 // in order to withhold the Selection Logic to check all ports READY_N value
950 // every callback cycle to update ready variable, we check READY_N and update READY here
951 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
952 port->sm_mux_state = AD_MUX_DETACHED; // next state
956 // check if the wait_while_timer expired
957 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) {
958 port->sm_vars |= AD_PORT_READY_N;
961 // in order to withhold the selection logic to check all ports READY_N value
962 // every callback cycle to update ready variable, we check READY_N and update READY here
963 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
965 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
966 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) {
967 port->sm_mux_state = AD_MUX_ATTACHED; // next state
970 case AD_MUX_ATTACHED:
971 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
972 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
973 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
974 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
975 port->sm_vars &= ~AD_PORT_READY_N;
976 // in order to withhold the selection logic to check all ports READY_N value
977 // every callback cycle to update ready variable, we check READY_N and update READY here
978 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
979 port->sm_mux_state = AD_MUX_DETACHED;// next state
982 case AD_MUX_COLLECTING_DISTRIBUTING:
983 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
984 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
986 port->sm_mux_state = AD_MUX_ATTACHED;// next state
989 // if port state hasn't changed make
990 // sure that a collecting distributing
991 // port in an active aggregator is enabled
992 if (port->aggregator &&
993 port->aggregator->is_active &&
994 !__port_is_enabled(port)) {
1000 default: //to silence the compiler
1005 // check if the state machine was changed
1006 if (port->sm_mux_state != last_state) {
1007 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state);
1008 switch (port->sm_mux_state) {
1009 case AD_MUX_DETACHED:
1010 __detach_bond_from_agg(port);
1011 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1012 ad_disable_collecting_distributing(port);
1013 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1014 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1017 case AD_MUX_WAITING:
1018 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1020 case AD_MUX_ATTACHED:
1021 __attach_bond_to_agg(port);
1022 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1023 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1024 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1025 ad_disable_collecting_distributing(port);
1028 case AD_MUX_COLLECTING_DISTRIBUTING:
1029 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1030 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1031 ad_enable_collecting_distributing(port);
1034 default: //to silence the compiler
1041 * ad_rx_machine - handle a port's rx State Machine
1042 * @lacpdu: the lacpdu we've received
1043 * @port: the port we're looking at
1045 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1046 * CURRENT. If timer expired set the state machine in the proper state.
1047 * In other cases, this function checks if we need to switch to other state.
1049 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1051 rx_states_t last_state;
1053 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1054 __get_rx_machine_lock(port);
1056 // keep current State Machine state to compare later if it was changed
1057 last_state = port->sm_rx_state;
1059 // check if state machine should change state
1060 // first, check if port was reinitialized
1061 if (port->sm_vars & AD_PORT_BEGIN) {
1062 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1064 // check if port is not enabled
1065 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) {
1066 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1068 // check if new lacpdu arrived
1069 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1070 port->sm_rx_timer_counter = 0; // zero timer
1071 port->sm_rx_state = AD_RX_CURRENT;
1073 // if timer is on, and if it is expired
1074 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1075 switch (port->sm_rx_state) {
1077 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1080 port->sm_rx_state = AD_RX_EXPIRED; // next state
1082 default: //to silence the compiler
1086 // if no lacpdu arrived and no timer is on
1087 switch (port->sm_rx_state) {
1088 case AD_RX_PORT_DISABLED:
1089 if (port->sm_vars & AD_PORT_MOVED) {
1090 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1091 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1092 port->sm_rx_state = AD_RX_EXPIRED; // next state
1093 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) {
1094 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1097 default: //to silence the compiler
1104 // check if the State machine was changed or new lacpdu arrived
1105 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1106 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state);
1107 switch (port->sm_rx_state) {
1108 case AD_RX_INITIALIZE:
1109 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1110 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1112 port->sm_vars |= AD_PORT_LACP_ENABLED;
1114 port->sm_vars &= ~AD_PORT_SELECTED;
1115 __record_default(port);
1116 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1117 port->sm_vars &= ~AD_PORT_MOVED;
1118 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1120 /*- Fall Through -*/
1122 case AD_RX_PORT_DISABLED:
1123 port->sm_vars &= ~AD_PORT_MATCHED;
1125 case AD_RX_LACP_DISABLED:
1126 port->sm_vars &= ~AD_PORT_SELECTED;
1127 __record_default(port);
1128 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1129 port->sm_vars |= AD_PORT_MATCHED;
1130 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1133 //Reset of the Synchronization flag. (Standard 43.4.12)
1134 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1135 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1136 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1137 port->sm_vars &= ~AD_PORT_MATCHED;
1138 port->partner_oper.port_state |= AD_SHORT_TIMEOUT;
1139 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1140 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1142 case AD_RX_DEFAULTED:
1143 __update_default_selected(port);
1144 __record_default(port);
1145 port->sm_vars |= AD_PORT_MATCHED;
1146 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1149 // detect loopback situation
1150 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1151 // INFO_RECEIVED_LOOPBACK_FRAMES
1152 printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on "
1153 "adapter (%s). Check the configuration to verify that all "
1154 "Adapters are connected to 802.3ad compliant switch ports\n",
1155 port->slave->dev->master->name, port->slave->dev->name);
1156 __release_rx_machine_lock(port);
1159 __update_selected(lacpdu, port);
1160 __update_ntt(lacpdu, port);
1161 __record_pdu(lacpdu, port);
1162 __choose_matched(lacpdu, port);
1163 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1164 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1165 // verify that if the aggregator is enabled, the port is enabled too.
1166 //(because if the link goes down for a short time, the 802.3ad will not
1167 // catch it, and the port will continue to be disabled)
1168 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) {
1169 __enable_port(port);
1172 default: //to silence the compiler
1176 __release_rx_machine_lock(port);
1180 * ad_tx_machine - handle a port's tx state machine
1181 * @port: the port we're looking at
1184 static void ad_tx_machine(struct port *port)
1186 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1187 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1188 // check if there is something to send
1189 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1190 __update_lacpdu_from_port(port);
1192 if (ad_lacpdu_send(port) >= 0) {
1193 pr_debug("Sent LACPDU on port %d\n", port->actor_port_number);
1194 // mark ntt as false, so it will not be sent again until demanded
1198 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1199 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1204 * ad_periodic_machine - handle a port's periodic state machine
1205 * @port: the port we're looking at
1207 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1209 static void ad_periodic_machine(struct port *port)
1211 periodic_states_t last_state;
1213 // keep current state machine state to compare later if it was changed
1214 last_state = port->sm_periodic_state;
1216 // check if port was reinitialized
1217 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1218 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1220 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1222 // check if state machine should change state
1223 else if (port->sm_periodic_timer_counter) {
1224 // check if periodic state machine expired
1225 if (!(--port->sm_periodic_timer_counter)) {
1226 // if expired then do tx
1227 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1229 // If not expired, check if there is some new timeout parameter from the partner state
1230 switch (port->sm_periodic_state) {
1231 case AD_FAST_PERIODIC:
1232 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1233 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1236 case AD_SLOW_PERIODIC:
1237 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1238 // stop current timer
1239 port->sm_periodic_timer_counter = 0;
1240 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1243 default: //to silence the compiler
1248 switch (port->sm_periodic_state) {
1249 case AD_NO_PERIODIC:
1250 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1252 case AD_PERIODIC_TX:
1253 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1254 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1256 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1259 default: //to silence the compiler
1264 // check if the state machine was changed
1265 if (port->sm_periodic_state != last_state) {
1266 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state);
1267 switch (port->sm_periodic_state) {
1268 case AD_NO_PERIODIC:
1269 port->sm_periodic_timer_counter = 0; // zero timer
1271 case AD_FAST_PERIODIC:
1272 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1274 case AD_SLOW_PERIODIC:
1275 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1277 case AD_PERIODIC_TX:
1280 default: //to silence the compiler
1287 * ad_port_selection_logic - select aggregation groups
1288 * @port: the port we're looking at
1290 * Select aggregation groups, and assign each port for it's aggregetor. The
1291 * selection logic is called in the inititalization (after all the handshkes),
1292 * and after every lacpdu receive (if selected is off).
1294 static void ad_port_selection_logic(struct port *port)
1296 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1297 struct port *last_port = NULL, *curr_port;
1300 // if the port is already Selected, do nothing
1301 if (port->sm_vars & AD_PORT_SELECTED) {
1305 // if the port is connected to other aggregator, detach it
1306 if (port->aggregator) {
1307 // detach the port from its former aggregator
1308 temp_aggregator=port->aggregator;
1309 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) {
1310 if (curr_port == port) {
1311 temp_aggregator->num_of_ports--;
1312 if (!last_port) {// if it is the first port attached to the aggregator
1313 temp_aggregator->lag_ports=port->next_port_in_aggregator;
1314 } else {// not the first port attached to the aggregator
1315 last_port->next_port_in_aggregator=port->next_port_in_aggregator;
1318 // clear the port's relations to this aggregator
1319 port->aggregator = NULL;
1320 port->next_port_in_aggregator=NULL;
1321 port->actor_port_aggregator_identifier=0;
1323 pr_debug("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier);
1324 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1325 if (!temp_aggregator->lag_ports) {
1326 ad_clear_agg(temp_aggregator);
1331 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1332 printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was "
1333 "related to aggregator %d but was not on its port list\n",
1334 port->slave->dev->master->name,
1335 port->actor_port_number, port->slave->dev->name,
1336 port->aggregator->aggregator_identifier);
1339 // search on all aggregators for a suitable aggregator for this port
1340 for (aggregator = __get_first_agg(port); aggregator;
1341 aggregator = __get_next_agg(aggregator)) {
1343 // keep a free aggregator for later use(if needed)
1344 if (!aggregator->lag_ports) {
1345 if (!free_aggregator) {
1346 free_aggregator=aggregator;
1350 // check if current aggregator suits us
1351 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1352 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1353 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1354 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1356 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1357 !aggregator->is_individual) // but is not individual OR
1360 // attach to the founded aggregator
1361 port->aggregator = aggregator;
1362 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1363 port->next_port_in_aggregator=aggregator->lag_ports;
1364 port->aggregator->num_of_ports++;
1365 aggregator->lag_ports=port;
1366 pr_debug("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1368 // mark this port as selected
1369 port->sm_vars |= AD_PORT_SELECTED;
1375 // the port couldn't find an aggregator - attach it to a new aggregator
1377 if (free_aggregator) {
1378 // assign port a new aggregator
1379 port->aggregator = free_aggregator;
1380 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1382 // update the new aggregator's parameters
1383 // if port was responsed from the end-user
1384 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex
1385 port->aggregator->is_individual = 0;
1387 port->aggregator->is_individual = 1;
1390 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1391 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1392 port->aggregator->partner_system=port->partner_oper.system;
1393 port->aggregator->partner_system_priority = port->partner_oper.system_priority;
1394 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1395 port->aggregator->receive_state = 1;
1396 port->aggregator->transmit_state = 1;
1397 port->aggregator->lag_ports = port;
1398 port->aggregator->num_of_ports++;
1400 // mark this port as selected
1401 port->sm_vars |= AD_PORT_SELECTED;
1403 pr_debug("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1405 printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n",
1406 port->slave->dev->master->name,
1407 port->actor_port_number, port->slave->dev->name);
1410 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1411 // else set ready=FALSE in all aggregator's ports
1412 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1414 aggregator = __get_first_agg(port);
1415 ad_agg_selection_logic(aggregator);
1419 * Decide if "agg" is a better choice for the new active aggregator that
1420 * the current best, according to the ad_select policy.
1422 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1423 struct aggregator *curr)
1426 * 0. If no best, select current.
1428 * 1. If the current agg is not individual, and the best is
1429 * individual, select current.
1431 * 2. If current agg is individual and the best is not, keep best.
1433 * 3. Therefore, current and best are both individual or both not
1436 * 3a. If current agg partner replied, and best agg partner did not,
1439 * 3b. If current agg partner did not reply and best agg partner
1440 * did reply, keep best.
1442 * 4. Therefore, current and best both have partner replies or
1443 * both do not, so perform selection policy:
1445 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1446 * select by bandwidth.
1448 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1453 if (!curr->is_individual && best->is_individual)
1456 if (curr->is_individual && !best->is_individual)
1459 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1462 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1465 switch (__get_agg_selection_mode(curr->lag_ports)) {
1467 if (curr->num_of_ports > best->num_of_ports)
1470 if (curr->num_of_ports < best->num_of_ports)
1474 case BOND_AD_STABLE:
1475 case BOND_AD_BANDWIDTH:
1476 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1482 printk(KERN_WARNING DRV_NAME
1483 ": %s: Impossible agg select mode %d\n",
1484 curr->slave->dev->master->name,
1485 __get_agg_selection_mode(curr->lag_ports));
1493 * ad_agg_selection_logic - select an aggregation group for a team
1494 * @aggregator: the aggregator we're looking at
1496 * It is assumed that only one aggregator may be selected for a team.
1498 * The logic of this function is to select the aggregator according to
1499 * the ad_select policy:
1501 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1502 * it, and to reselect the active aggregator only if the previous
1503 * aggregator has no more ports related to it.
1505 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1506 * bandwidth, and reselect whenever a link state change takes place or the
1507 * set of slaves in the bond changes.
1509 * BOND_AD_COUNT: select the aggregator with largest number of ports
1510 * (slaves), and reselect whenever a link state change takes place or the
1511 * set of slaves in the bond changes.
1513 * FIXME: this function MUST be called with the first agg in the bond, or
1514 * __get_active_agg() won't work correctly. This function should be better
1515 * called with the bond itself, and retrieve the first agg from it.
1517 static void ad_agg_selection_logic(struct aggregator *agg)
1519 struct aggregator *best, *active, *origin;
1524 active = __get_active_agg(agg);
1530 if (agg->num_of_ports)
1531 best = ad_agg_selection_test(best, agg);
1533 } while ((agg = __get_next_agg(agg)));
1536 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1538 * For the STABLE policy, don't replace the old active
1539 * aggregator if it's still active (it has an answering
1540 * partner) or if both the best and active don't have an
1541 * answering partner.
1543 if (active && active->lag_ports &&
1544 active->lag_ports->is_enabled &&
1545 (__agg_has_partner(active) ||
1546 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1547 if (!(!active->actor_oper_aggregator_key &&
1548 best->actor_oper_aggregator_key)) {
1550 active->is_active = 1;
1555 if (best && (best == active)) {
1557 active->is_active = 1;
1560 // if there is new best aggregator, activate it
1562 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1563 best->aggregator_identifier, best->num_of_ports,
1564 best->actor_oper_aggregator_key,
1565 best->partner_oper_aggregator_key,
1566 best->is_individual, best->is_active);
1567 pr_debug("best ports %p slave %p %s\n",
1568 best->lag_ports, best->slave,
1569 best->slave ? best->slave->dev->name : "NULL");
1571 for (agg = __get_first_agg(best->lag_ports); agg;
1572 agg = __get_next_agg(agg)) {
1574 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1575 agg->aggregator_identifier, agg->num_of_ports,
1576 agg->actor_oper_aggregator_key,
1577 agg->partner_oper_aggregator_key,
1578 agg->is_individual, agg->is_active);
1581 // check if any partner replys
1582 if (best->is_individual) {
1583 printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad"
1584 " response from the link partner for any"
1585 " adapters in the bond\n",
1586 best->slave->dev->master->name);
1589 best->is_active = 1;
1590 pr_debug("LAG %d chosen as the active LAG\n",
1591 best->aggregator_identifier);
1592 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1593 best->aggregator_identifier, best->num_of_ports,
1594 best->actor_oper_aggregator_key,
1595 best->partner_oper_aggregator_key,
1596 best->is_individual, best->is_active);
1598 // disable the ports that were related to the former active_aggregator
1600 for (port = active->lag_ports; port;
1601 port = port->next_port_in_aggregator) {
1602 __disable_port(port);
1608 * if the selected aggregator is of join individuals
1609 * (partner_system is NULL), enable their ports
1611 active = __get_active_agg(origin);
1614 if (!__agg_has_partner(active)) {
1615 for (port = active->lag_ports; port;
1616 port = port->next_port_in_aggregator) {
1617 __enable_port(port);
1622 if (origin->slave) {
1623 struct bonding *bond;
1625 bond = bond_get_bond_by_slave(origin->slave);
1627 bond_3ad_set_carrier(bond);
1632 * ad_clear_agg - clear a given aggregator's parameters
1633 * @aggregator: the aggregator we're looking at
1636 static void ad_clear_agg(struct aggregator *aggregator)
1639 aggregator->is_individual = 0;
1640 aggregator->actor_admin_aggregator_key = 0;
1641 aggregator->actor_oper_aggregator_key = 0;
1642 aggregator->partner_system = null_mac_addr;
1643 aggregator->partner_system_priority = 0;
1644 aggregator->partner_oper_aggregator_key = 0;
1645 aggregator->receive_state = 0;
1646 aggregator->transmit_state = 0;
1647 aggregator->lag_ports = NULL;
1648 aggregator->is_active = 0;
1649 aggregator->num_of_ports = 0;
1650 pr_debug("LAG %d was cleared\n", aggregator->aggregator_identifier);
1655 * ad_initialize_agg - initialize a given aggregator's parameters
1656 * @aggregator: the aggregator we're looking at
1659 static void ad_initialize_agg(struct aggregator *aggregator)
1662 ad_clear_agg(aggregator);
1664 aggregator->aggregator_mac_address = null_mac_addr;
1665 aggregator->aggregator_identifier = 0;
1666 aggregator->slave = NULL;
1671 * ad_initialize_port - initialize a given port's parameters
1672 * @aggregator: the aggregator we're looking at
1673 * @lacp_fast: boolean. whether fast periodic should be used
1676 static void ad_initialize_port(struct port *port, int lacp_fast)
1678 static const struct port_params tmpl = {
1679 .system_priority = 0xffff,
1682 .port_priority = 0xff,
1687 port->actor_port_number = 1;
1688 port->actor_port_priority = 0xff;
1689 port->actor_system = null_mac_addr;
1690 port->actor_system_priority = 0xffff;
1691 port->actor_port_aggregator_identifier = 0;
1693 port->actor_admin_port_key = 1;
1694 port->actor_oper_port_key = 1;
1695 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1696 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1699 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1702 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1703 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1705 port->is_enabled = 1;
1706 // ****** private parameters ******
1707 port->sm_vars = 0x3;
1708 port->sm_rx_state = 0;
1709 port->sm_rx_timer_counter = 0;
1710 port->sm_periodic_state = 0;
1711 port->sm_periodic_timer_counter = 0;
1712 port->sm_mux_state = 0;
1713 port->sm_mux_timer_counter = 0;
1714 port->sm_tx_state = 0;
1715 port->sm_tx_timer_counter = 0;
1717 port->aggregator = NULL;
1718 port->next_port_in_aggregator = NULL;
1719 port->transaction_id = 0;
1721 ad_initialize_lacpdu(&(port->lacpdu));
1726 * ad_enable_collecting_distributing - enable a port's transmit/receive
1727 * @port: the port we're looking at
1729 * Enable @port if it's in an active aggregator
1731 static void ad_enable_collecting_distributing(struct port *port)
1733 if (port->aggregator->is_active) {
1734 pr_debug("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1735 __enable_port(port);
1740 * ad_disable_collecting_distributing - disable a port's transmit/receive
1741 * @port: the port we're looking at
1744 static void ad_disable_collecting_distributing(struct port *port)
1746 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
1747 pr_debug("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1748 __disable_port(port);
1754 * ad_marker_info_send - send a marker information frame
1755 * @port: the port we're looking at
1757 * This function does nothing since we decided not to implement send and handle
1758 * response for marker PDU's, in this stage, but only to respond to marker
1761 static void ad_marker_info_send(struct port *port)
1763 struct bond_marker marker;
1766 // fill the marker PDU with the appropriate values
1767 marker.subtype = 0x02;
1768 marker.version_number = 0x01;
1769 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1770 marker.marker_length = 0x16;
1771 // convert requester_port to Big Endian
1772 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1773 marker.requester_system = port->actor_system;
1774 // convert requester_port(u32) to Big Endian
1775 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24));
1777 marker.tlv_type_terminator = 0x00;
1778 marker.terminator_length = 0x00;
1779 for (index=0; index<90; index++) {
1780 marker.reserved_90[index]=0;
1783 // send the marker information
1784 if (ad_marker_send(port, &marker) >= 0) {
1785 pr_debug("Sent Marker Information on port %d\n", port->actor_port_number);
1791 * ad_marker_info_received - handle receive of a Marker information frame
1792 * @marker_info: Marker info received
1793 * @port: the port we're looking at
1796 static void ad_marker_info_received(struct bond_marker *marker_info,
1799 struct bond_marker marker;
1801 // copy the received marker data to the response marker
1802 //marker = *marker_info;
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;
1806 // send the marker response
1808 if (ad_marker_send(port, &marker) >= 0) {
1809 pr_debug("Sent Marker Response on port %d\n", port->actor_port_number);
1814 * ad_marker_response_received - handle receive of a marker response frame
1815 * @marker: marker PDU received
1816 * @port: the port we're looking at
1818 * This function does nothing since we decided not to implement send and handle
1819 * response for marker PDU's, in this stage, but only to respond to marker
1822 static void ad_marker_response_received(struct bond_marker *marker,
1825 marker=NULL; // just to satisfy the compiler
1826 port=NULL; // just to satisfy the compiler
1827 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1831 * ad_initialize_lacpdu - initialize a given lacpdu structure
1832 * @lacpdu: lacpdu structure to initialize
1835 static void ad_initialize_lacpdu(struct lacpdu *lacpdu)
1839 // initialize lacpdu data
1840 lacpdu->subtype = 0x01;
1841 lacpdu->version_number = 0x01;
1842 lacpdu->tlv_type_actor_info = 0x01;
1843 lacpdu->actor_information_length = 0x14;
1844 // lacpdu->actor_system_priority updated on send
1845 // lacpdu->actor_system updated on send
1846 // lacpdu->actor_key updated on send
1847 // lacpdu->actor_port_priority updated on send
1848 // lacpdu->actor_port updated on send
1849 // lacpdu->actor_state updated on send
1850 lacpdu->tlv_type_partner_info = 0x02;
1851 lacpdu->partner_information_length = 0x14;
1852 for (index=0; index<=2; index++) {
1853 lacpdu->reserved_3_1[index]=0;
1855 // lacpdu->partner_system_priority updated on send
1856 // lacpdu->partner_system updated on send
1857 // lacpdu->partner_key updated on send
1858 // lacpdu->partner_port_priority updated on send
1859 // lacpdu->partner_port updated on send
1860 // lacpdu->partner_state updated on send
1861 for (index=0; index<=2; index++) {
1862 lacpdu->reserved_3_2[index]=0;
1864 lacpdu->tlv_type_collector_info = 0x03;
1865 lacpdu->collector_information_length= 0x10;
1866 lacpdu->collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY);
1867 for (index=0; index<=11; index++) {
1868 lacpdu->reserved_12[index]=0;
1870 lacpdu->tlv_type_terminator = 0x00;
1871 lacpdu->terminator_length = 0;
1872 for (index=0; index<=49; index++) {
1873 lacpdu->reserved_50[index]=0;
1877 //////////////////////////////////////////////////////////////////////////////////////
1878 // ================= AD exported functions to the main bonding code ==================
1879 //////////////////////////////////////////////////////////////////////////////////////
1881 // Check aggregators status in team every T seconds
1882 #define AD_AGGREGATOR_SELECTION_TIMER 8
1885 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1887 * Set the aggregation selection timer, to initiate an agg selection in
1888 * the very near future. Called during first initialization, and during
1889 * any down to up transitions of the bond.
1891 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1893 BOND_AD_INFO(bond).agg_select_timer = timeout;
1894 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select;
1897 static u16 aggregator_identifier;
1900 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1901 * @bond: bonding struct to work on
1902 * @tick_resolution: tick duration (millisecond resolution)
1903 * @lacp_fast: boolean. whether fast periodic should be used
1905 * Can be called only after the mac address of the bond is set.
1907 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
1909 // check that the bond is not initialized yet
1910 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) {
1912 aggregator_identifier = 0;
1914 BOND_AD_INFO(bond).lacp_fast = lacp_fast;
1915 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1916 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1918 // initialize how many times this module is called in one second(should be about every 100ms)
1919 ad_ticks_per_sec = tick_resolution;
1921 bond_3ad_initiate_agg_selection(bond,
1922 AD_AGGREGATOR_SELECTION_TIMER *
1928 * bond_3ad_bind_slave - initialize a slave's port
1929 * @slave: slave struct to work on
1931 * Returns: 0 on success
1934 int bond_3ad_bind_slave(struct slave *slave)
1936 struct bonding *bond = bond_get_bond_by_slave(slave);
1938 struct aggregator *aggregator;
1941 printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n",
1942 slave->dev->master->name, slave->dev->name);
1946 //check that the slave has not been intialized yet.
1947 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1949 // port initialization
1950 port = &(SLAVE_AD_INFO(slave).port);
1952 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
1954 port->slave = slave;
1955 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1956 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1957 // ------------------------------------------------------------
1958 // Port key : | User key | Speed |Duplex|
1959 // ------------------------------------------------------------
1961 port->actor_admin_port_key = 0; // initialize this parameter
1962 port->actor_admin_port_key |= __get_duplex(port);
1963 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1964 port->actor_oper_port_key = port->actor_admin_port_key;
1965 // if the port is not full duplex, then the port should be not lacp Enabled
1966 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1967 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1969 // actor system is the bond's system
1970 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1971 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1972 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1973 port->aggregator = NULL;
1974 port->next_port_in_aggregator = NULL;
1976 __disable_port(port);
1977 __initialize_port_locks(port);
1980 // aggregator initialization
1981 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1983 ad_initialize_agg(aggregator);
1985 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1986 aggregator->aggregator_identifier = (++aggregator_identifier);
1987 aggregator->slave = slave;
1988 aggregator->is_active = 0;
1989 aggregator->num_of_ports = 0;
1996 * bond_3ad_unbind_slave - deinitialize a slave's port
1997 * @slave: slave struct to work on
1999 * Search for the aggregator that is related to this port, remove the
2000 * aggregator and assign another aggregator for other port related to it
2001 * (if any), and remove the port.
2003 void bond_3ad_unbind_slave(struct slave *slave)
2005 struct port *port, *prev_port, *temp_port;
2006 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2007 int select_new_active_agg = 0;
2009 // find the aggregator related to this slave
2010 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
2012 // find the port related to this slave
2013 port = &(SLAVE_AD_INFO(slave).port);
2015 // if slave is null, the whole port is not initialized
2017 printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to "
2018 "unbind an uninitialized port on %s\n",
2019 slave->dev->master->name, slave->dev->name);
2023 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier);
2025 /* Tell the partner that this port is not suitable for aggregation */
2026 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2027 __update_lacpdu_from_port(port);
2028 ad_lacpdu_send(port);
2030 // check if this aggregator is occupied
2031 if (aggregator->lag_ports) {
2032 // check if there are other ports related to this aggregator except
2033 // the port related to this slave(thats ensure us that there is a
2034 // reason to search for new aggregator, and that we will find one
2035 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2036 // find new aggregator for the related port(s)
2037 new_aggregator = __get_first_agg(port);
2038 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
2039 // if the new aggregator is empty, or it connected to to our port only
2040 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) {
2044 // if new aggregator found, copy the aggregator's parameters
2045 // and connect the related lag_ports to the new aggregator
2046 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2047 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier);
2049 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
2050 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2051 aggregator->slave->dev->master->name);
2052 // select new active aggregator
2053 select_new_active_agg = 1;
2056 new_aggregator->is_individual = aggregator->is_individual;
2057 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2058 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2059 new_aggregator->partner_system = aggregator->partner_system;
2060 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2061 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2062 new_aggregator->receive_state = aggregator->receive_state;
2063 new_aggregator->transmit_state = aggregator->transmit_state;
2064 new_aggregator->lag_ports = aggregator->lag_ports;
2065 new_aggregator->is_active = aggregator->is_active;
2066 new_aggregator->num_of_ports = aggregator->num_of_ports;
2068 // update the information that is written on the ports about the aggregator
2069 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) {
2070 temp_port->aggregator=new_aggregator;
2071 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2074 // clear the aggregator
2075 ad_clear_agg(aggregator);
2077 if (select_new_active_agg) {
2078 ad_agg_selection_logic(__get_first_agg(port));
2081 printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, "
2082 "and could not find a new aggregator for its ports\n",
2083 slave->dev->master->name);
2085 } else { // in case that the only port related to this aggregator is the one we want to remove
2086 select_new_active_agg = aggregator->is_active;
2087 // clear the aggregator
2088 ad_clear_agg(aggregator);
2089 if (select_new_active_agg) {
2090 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2091 slave->dev->master->name);
2092 // select new active aggregator
2093 ad_agg_selection_logic(__get_first_agg(port));
2098 pr_debug("Unbinding port %d\n", port->actor_port_number);
2099 // find the aggregator that this port is connected to
2100 temp_aggregator = __get_first_agg(port);
2101 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2103 // search the port in the aggregator's related ports
2104 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) {
2105 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
2107 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2109 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2111 temp_aggregator->num_of_ports--;
2112 if (temp_aggregator->num_of_ports==0) {
2113 select_new_active_agg = temp_aggregator->is_active;
2114 // clear the aggregator
2115 ad_clear_agg(temp_aggregator);
2116 if (select_new_active_agg) {
2117 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2118 slave->dev->master->name);
2119 // select new active aggregator
2120 ad_agg_selection_logic(__get_first_agg(port));
2131 * bond_3ad_state_machine_handler - handle state machines timeout
2132 * @bond: bonding struct to work on
2134 * The state machine handling concept in this module is to check every tick
2135 * which state machine should operate any function. The execution order is
2136 * round robin, so when we have an interaction between state machines, the
2137 * reply of one to each other might be delayed until next tick.
2139 * This function also complete the initialization when the agg_select_timer
2140 * times out, and it selects an aggregator for the ports that are yet not
2141 * related to any aggregator, and selects the active aggregator for a bond.
2143 void bond_3ad_state_machine_handler(struct work_struct *work)
2145 struct bonding *bond = container_of(work, struct bonding,
2148 struct aggregator *aggregator;
2150 read_lock(&bond->lock);
2152 if (bond->kill_timers) {
2156 //check if there are any slaves
2157 if (bond->slave_cnt == 0) {
2161 // check if agg_select_timer timer after initialize is timed out
2162 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2163 // select the active aggregator for the bond
2164 if ((port = __get_first_port(bond))) {
2166 printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is "
2167 "uninitialized\n", bond->dev->name);
2171 aggregator = __get_first_agg(port);
2172 ad_agg_selection_logic(aggregator);
2174 bond_3ad_set_carrier(bond);
2177 // for each port run the state machines
2178 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2180 printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized "
2181 "port\n", bond->dev->name);
2185 ad_rx_machine(NULL, port);
2186 ad_periodic_machine(port);
2187 ad_port_selection_logic(port);
2188 ad_mux_machine(port);
2189 ad_tx_machine(port);
2191 // turn off the BEGIN bit, since we already handled it
2192 if (port->sm_vars & AD_PORT_BEGIN) {
2193 port->sm_vars &= ~AD_PORT_BEGIN;
2198 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2200 read_unlock(&bond->lock);
2204 * bond_3ad_rx_indication - handle a received frame
2205 * @lacpdu: received lacpdu
2206 * @slave: slave struct to work on
2207 * @length: length of the data received
2209 * It is assumed that frames that were sent on this NIC don't returned as new
2210 * received frames (loopback). Since only the payload is given to this
2211 * function, it check for loopback.
2213 static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2217 if (length >= sizeof(struct lacpdu)) {
2219 port = &(SLAVE_AD_INFO(slave).port);
2222 printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is "
2223 "uninitialized\n", slave->dev->name, slave->dev->master->name);
2227 switch (lacpdu->subtype) {
2228 case AD_TYPE_LACPDU:
2229 pr_debug("Received LACPDU on port %d\n", port->actor_port_number);
2230 ad_rx_machine(lacpdu, port);
2233 case AD_TYPE_MARKER:
2234 // No need to convert fields to Little Endian since we don't use the marker's fields.
2236 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2237 case AD_MARKER_INFORMATION_SUBTYPE:
2238 pr_debug("Received Marker Information on port %d\n", port->actor_port_number);
2239 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2242 case AD_MARKER_RESPONSE_SUBTYPE:
2243 pr_debug("Received Marker Response on port %d\n", port->actor_port_number);
2244 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2248 pr_debug("Received an unknown Marker subtype on slot %d\n", port->actor_port_number);
2255 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2256 * @slave: slave struct to work on
2258 * Handle reselection of aggregator (if needed) for this port.
2260 void bond_3ad_adapter_speed_changed(struct slave *slave)
2264 port = &(SLAVE_AD_INFO(slave).port);
2266 // if slave is null, the whole port is not initialized
2268 printk(KERN_WARNING DRV_NAME ": Warning: %s: speed "
2269 "changed for uninitialized port on %s\n",
2270 slave->dev->master->name, slave->dev->name);
2274 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2275 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2276 pr_debug("Port %d changed speed\n", port->actor_port_number);
2277 // there is no need to reselect a new aggregator, just signal the
2278 // state machines to reinitialize
2279 port->sm_vars |= AD_PORT_BEGIN;
2283 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2284 * @slave: slave struct to work on
2286 * Handle reselection of aggregator (if needed) for this port.
2288 void bond_3ad_adapter_duplex_changed(struct slave *slave)
2292 port=&(SLAVE_AD_INFO(slave).port);
2294 // if slave is null, the whole port is not initialized
2296 printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed "
2297 "for uninitialized port on %s\n",
2298 slave->dev->master->name, slave->dev->name);
2302 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2303 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2304 pr_debug("Port %d changed duplex\n", port->actor_port_number);
2305 // there is no need to reselect a new aggregator, just signal the
2306 // state machines to reinitialize
2307 port->sm_vars |= AD_PORT_BEGIN;
2311 * bond_3ad_handle_link_change - handle a slave's link status change indication
2312 * @slave: slave struct to work on
2313 * @status: whether the link is now up or down
2315 * Handle reselection of aggregator (if needed) for this port.
2317 void bond_3ad_handle_link_change(struct slave *slave, char link)
2321 port = &(SLAVE_AD_INFO(slave).port);
2323 // if slave is null, the whole port is not initialized
2325 printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for "
2326 "uninitialized port on %s\n",
2327 slave->dev->master->name, slave->dev->name);
2331 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
2332 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2333 if (link == BOND_LINK_UP) {
2334 port->is_enabled = 1;
2335 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2336 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2337 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2338 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2340 /* link has failed */
2341 port->is_enabled = 0;
2342 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2343 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS);
2345 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2346 // there is no need to reselect a new aggregator, just signal the
2347 // state machines to reinitialize
2348 port->sm_vars |= AD_PORT_BEGIN;
2352 * set link state for bonding master: if we have an active
2353 * aggregator, we're up, if not, we're down. Presumes that we cannot
2354 * have an active aggregator if there are no slaves with link up.
2356 * This behavior complies with IEEE 802.3 section 43.3.9.
2358 * Called by bond_set_carrier(). Return zero if carrier state does not
2359 * change, nonzero if it does.
2361 int bond_3ad_set_carrier(struct bonding *bond)
2363 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
2364 if (!netif_carrier_ok(bond->dev)) {
2365 netif_carrier_on(bond->dev);
2371 if (netif_carrier_ok(bond->dev)) {
2372 netif_carrier_off(bond->dev);
2379 * bond_3ad_get_active_agg_info - get information of the active aggregator
2380 * @bond: bonding struct to work on
2381 * @ad_info: ad_info struct to fill with the bond's info
2383 * Returns: 0 on success
2386 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2388 struct aggregator *aggregator = NULL;
2391 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2392 if (port->aggregator && port->aggregator->is_active) {
2393 aggregator = port->aggregator;
2399 ad_info->aggregator_id = aggregator->aggregator_identifier;
2400 ad_info->ports = aggregator->num_of_ports;
2401 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2402 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2403 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2410 int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2412 struct slave *slave, *start_at;
2413 struct bonding *bond = netdev_priv(dev);
2418 struct ad_info ad_info;
2421 /* make sure that the slaves list will
2422 * not change during tx
2424 read_lock(&bond->lock);
2426 if (!BOND_IS_OK(bond)) {
2430 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
2431 printk(KERN_DEBUG DRV_NAME ": %s: Error: "
2432 "bond_3ad_get_active_agg_info failed\n", dev->name);
2436 slaves_in_agg = ad_info.ports;
2437 agg_id = ad_info.aggregator_id;
2439 if (slaves_in_agg == 0) {
2440 /*the aggregator is empty*/
2441 printk(KERN_DEBUG DRV_NAME ": %s: Error: active "
2442 "aggregator is empty\n",
2447 slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg);
2449 bond_for_each_slave(bond, slave, i) {
2450 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2452 if (agg && (agg->aggregator_identifier == agg_id)) {
2454 if (slave_agg_no < 0) {
2460 if (slave_agg_no >= 0) {
2461 printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on "
2462 "for aggregator ID %d\n", dev->name, agg_id);
2468 bond_for_each_slave_from(bond, slave, i, start_at) {
2469 int slave_agg_id = 0;
2470 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2473 slave_agg_id = agg->aggregator_identifier;
2476 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2477 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2484 /* no suitable interface, frame not sent */
2487 read_unlock(&bond->lock);
2491 int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev)
2493 struct bonding *bond = netdev_priv(dev);
2494 struct slave *slave = NULL;
2495 int ret = NET_RX_DROP;
2497 if (dev_net(dev) != &init_net)
2500 if (!(dev->flags & IFF_MASTER))
2503 read_lock(&bond->lock);
2504 slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev),
2509 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
2511 ret = NET_RX_SUCCESS;
2514 read_unlock(&bond->lock);