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1/*
2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3 *
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)
7 * any later version.
8 *
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
12 * more details.
13 *
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.
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 */
22
23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/skbuff.h>
26#include <linux/if_ether.h>
27#include <linux/netdevice.h>
28#include <linux/spinlock.h>
29#include <linux/ethtool.h>
30#include <linux/etherdevice.h>
31#include <linux/if_bonding.h>
32#include <linux/pkt_sched.h>
33#include <net/net_namespace.h>
34#include "bonding.h"
35#include "bond_3ad.h"
36
37/* General definitions */
38#define AD_SHORT_TIMEOUT 1
39#define AD_LONG_TIMEOUT 0
40#define AD_STANDBY 0x2
41#define AD_MAX_TX_IN_SECOND 3
42#define AD_COLLECTOR_MAX_DELAY 0
43
44/* Timer definitions (43.4.4 in the 802.3ad standard) */
45#define AD_FAST_PERIODIC_TIME 1
46#define AD_SLOW_PERIODIC_TIME 30
47#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
48#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
49#define AD_CHURN_DETECTION_TIME 60
50#define AD_AGGREGATE_WAIT_TIME 2
51
52/* Port state definitions (43.4.2.2 in the 802.3ad standard) */
53#define AD_STATE_LACP_ACTIVITY 0x1
54#define AD_STATE_LACP_TIMEOUT 0x2
55#define AD_STATE_AGGREGATION 0x4
56#define AD_STATE_SYNCHRONIZATION 0x8
57#define AD_STATE_COLLECTING 0x10
58#define AD_STATE_DISTRIBUTING 0x20
59#define AD_STATE_DEFAULTED 0x40
60#define AD_STATE_EXPIRED 0x80
61
62/* Port Variables definitions used by the State Machines (43.4.7 in the
63 * 802.3ad standard)
64 */
65#define AD_PORT_BEGIN 0x1
66#define AD_PORT_LACP_ENABLED 0x2
67#define AD_PORT_ACTOR_CHURN 0x4
68#define AD_PORT_PARTNER_CHURN 0x8
69#define AD_PORT_READY 0x10
70#define AD_PORT_READY_N 0x20
71#define AD_PORT_MATCHED 0x40
72#define AD_PORT_STANDBY 0x80
73#define AD_PORT_SELECTED 0x100
74#define AD_PORT_MOVED 0x200
75
76/* Port Key definitions
77 * key is determined according to the link speed, duplex and
78 * user key (which is yet not supported)
79 * --------------------------------------------------------------
80 * Port key : | User key | Speed | Duplex |
81 * --------------------------------------------------------------
82 * 16 6 1 0
83 */
84#define AD_DUPLEX_KEY_BITS 0x1
85#define AD_SPEED_KEY_BITS 0x3E
86#define AD_USER_KEY_BITS 0xFFC0
87
88#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
89#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
90#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
91#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
92#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
93
94/* compare MAC addresses */
95#define MAC_ADDRESS_EQUAL(A, B) \
96 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
97
98static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
99static u16 ad_ticks_per_sec;
100static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
101
102static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
103
104/* ================= main 802.3ad protocol functions ================== */
105static int ad_lacpdu_send(struct port *port);
106static int ad_marker_send(struct port *port, struct bond_marker *marker);
107static void ad_mux_machine(struct port *port);
108static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
109static void ad_tx_machine(struct port *port);
110static void ad_periodic_machine(struct port *port);
111static void ad_port_selection_logic(struct port *port);
112static void ad_agg_selection_logic(struct aggregator *aggregator);
113static void ad_clear_agg(struct aggregator *aggregator);
114static void ad_initialize_agg(struct aggregator *aggregator);
115static void ad_initialize_port(struct port *port, int lacp_fast);
116static void ad_enable_collecting_distributing(struct port *port);
117static void ad_disable_collecting_distributing(struct port *port);
118static void ad_marker_info_received(struct bond_marker *marker_info,
119 struct port *port);
120static void ad_marker_response_received(struct bond_marker *marker,
121 struct port *port);
122
123
124/* ================= api to bonding and kernel code ================== */
125
126/**
127 * __get_bond_by_port - get the port's bonding struct
128 * @port: the port we're looking at
129 *
130 * Return @port's bonding struct, or %NULL if it can't be found.
131 */
132static inline struct bonding *__get_bond_by_port(struct port *port)
133{
134 if (port->slave == NULL)
135 return NULL;
136
137 return bond_get_bond_by_slave(port->slave);
138}
139
140/**
141 * __get_first_agg - get the first aggregator in the bond
142 * @bond: the bond we're looking at
143 *
144 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
145 * found.
146 * The caller must hold RCU or RTNL lock.
147 */
148static inline struct aggregator *__get_first_agg(struct port *port)
149{
150 struct bonding *bond = __get_bond_by_port(port);
151 struct slave *first_slave;
152 struct aggregator *agg;
153
154 /* If there's no bond for this port, or bond has no slaves */
155 if (bond == NULL)
156 return NULL;
157
158 rcu_read_lock();
159 first_slave = bond_first_slave_rcu(bond);
160 agg = first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL;
161 rcu_read_unlock();
162
163 return agg;
164}
165
166/**
167 * __agg_has_partner - see if we have a partner
168 * @agg: the agregator we're looking at
169 *
170 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
171 * address for the partner). Return 0 if not.
172 */
173static inline int __agg_has_partner(struct aggregator *agg)
174{
175 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
176}
177
178/**
179 * __disable_port - disable the port's slave
180 * @port: the port we're looking at
181 */
182static inline void __disable_port(struct port *port)
183{
184 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
185}
186
187/**
188 * __enable_port - enable the port's slave, if it's up
189 * @port: the port we're looking at
190 */
191static inline void __enable_port(struct port *port)
192{
193 struct slave *slave = port->slave;
194
195 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
196 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
197}
198
199/**
200 * __port_is_enabled - check if the port's slave is in active state
201 * @port: the port we're looking at
202 */
203static inline int __port_is_enabled(struct port *port)
204{
205 return bond_is_active_slave(port->slave);
206}
207
208/**
209 * __get_agg_selection_mode - get the aggregator selection mode
210 * @port: the port we're looking at
211 *
212 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
213 */
214static inline u32 __get_agg_selection_mode(struct port *port)
215{
216 struct bonding *bond = __get_bond_by_port(port);
217
218 if (bond == NULL)
219 return BOND_AD_STABLE;
220
221 return bond->params.ad_select;
222}
223
224/**
225 * __check_agg_selection_timer - check if the selection timer has expired
226 * @port: the port we're looking at
227 */
228static inline int __check_agg_selection_timer(struct port *port)
229{
230 struct bonding *bond = __get_bond_by_port(port);
231
232 if (bond == NULL)
233 return 0;
234
235 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
236}
237
238/**
239 * __get_state_machine_lock - lock the port's state machines
240 * @port: the port we're looking at
241 */
242static inline void __get_state_machine_lock(struct port *port)
243{
244 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
245}
246
247/**
248 * __release_state_machine_lock - unlock the port's state machines
249 * @port: the port we're looking at
250 */
251static inline void __release_state_machine_lock(struct port *port)
252{
253 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
254}
255
256/**
257 * __get_link_speed - get a port's speed
258 * @port: the port we're looking at
259 *
260 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
261 * 0,
262 * %AD_LINK_SPEED_BITMASK_10MBPS,
263 * %AD_LINK_SPEED_BITMASK_100MBPS,
264 * %AD_LINK_SPEED_BITMASK_1000MBPS,
265 * %AD_LINK_SPEED_BITMASK_10000MBPS
266 */
267static u16 __get_link_speed(struct port *port)
268{
269 struct slave *slave = port->slave;
270 u16 speed;
271
272 /* this if covers only a special case: when the configuration starts
273 * with link down, it sets the speed to 0.
274 * This is done in spite of the fact that the e100 driver reports 0
275 * to be compatible with MVT in the future.
276 */
277 if (slave->link != BOND_LINK_UP)
278 speed = 0;
279 else {
280 switch (slave->speed) {
281 case SPEED_10:
282 speed = AD_LINK_SPEED_BITMASK_10MBPS;
283 break;
284
285 case SPEED_100:
286 speed = AD_LINK_SPEED_BITMASK_100MBPS;
287 break;
288
289 case SPEED_1000:
290 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
291 break;
292
293 case SPEED_10000:
294 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
295 break;
296
297 default:
298 /* unknown speed value from ethtool. shouldn't happen */
299 speed = 0;
300 break;
301 }
302 }
303
304 pr_debug("Port %d Received link speed %d update from adapter\n",
305 port->actor_port_number, speed);
306 return speed;
307}
308
309/**
310 * __get_duplex - get a port's duplex
311 * @port: the port we're looking at
312 *
313 * Return @port's duplex in 802.3ad bitmask format. i.e.:
314 * 0x01 if in full duplex
315 * 0x00 otherwise
316 */
317static u8 __get_duplex(struct port *port)
318{
319 struct slave *slave = port->slave;
320
321 u8 retval;
322
323 /* handling a special case: when the configuration starts with
324 * link down, it sets the duplex to 0.
325 */
326 if (slave->link != BOND_LINK_UP)
327 retval = 0x0;
328 else {
329 switch (slave->duplex) {
330 case DUPLEX_FULL:
331 retval = 0x1;
332 pr_debug("Port %d Received status full duplex update from adapter\n",
333 port->actor_port_number);
334 break;
335 case DUPLEX_HALF:
336 default:
337 retval = 0x0;
338 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
339 port->actor_port_number);
340 break;
341 }
342 }
343 return retval;
344}
345
346/**
347 * __initialize_port_locks - initialize a port's STATE machine spinlock
348 * @port: the slave of the port we're looking at
349 */
350static inline void __initialize_port_locks(struct slave *slave)
351{
352 /* make sure it isn't called twice */
353 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock));
354}
355
356/* Conversions */
357
358/**
359 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
360 * @timer_type: which timer to operate
361 * @par: timer parameter. see below
362 *
363 * If @timer_type is %current_while_timer, @par indicates long/short timer.
364 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
365 * %SLOW_PERIODIC_TIME.
366 */
367static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
368{
369 u16 retval = 0; /* to silence the compiler */
370
371 switch (timer_type) {
372 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
373 if (par)
374 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
375 else
376 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
377 break;
378 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
379 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
380 break;
381 case AD_PERIODIC_TIMER: /* for periodic machine */
382 retval = (par*ad_ticks_per_sec); /* long timeout */
383 break;
384 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
385 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
386 break;
387 case AD_WAIT_WHILE_TIMER: /* for selection machine */
388 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
389 break;
390 }
391
392 return retval;
393}
394
395
396/* ================= ad_rx_machine helper functions ================== */
397
398/**
399 * __choose_matched - update a port's matched variable from a received lacpdu
400 * @lacpdu: the lacpdu we've received
401 * @port: the port we're looking at
402 *
403 * Update the value of the matched variable, using parameter values from a
404 * newly received lacpdu. Parameter values for the partner carried in the
405 * received PDU are compared with the corresponding operational parameter
406 * values for the actor. Matched is set to TRUE if all of these parameters
407 * match and the PDU parameter partner_state.aggregation has the same value as
408 * actor_oper_port_state.aggregation and lacp will actively maintain the link
409 * in the aggregation. Matched is also set to TRUE if the value of
410 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
411 * an individual link and lacp will actively maintain the link. Otherwise,
412 * matched is set to FALSE. LACP is considered to be actively maintaining the
413 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
414 * the actor's actor_oper_port_state.lacp_activity and the PDU's
415 * partner_state.lacp_activity variables are TRUE.
416 *
417 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
418 * used here to implement the language from 802.3ad 43.4.9 that requires
419 * recordPDU to "match" the LACPDU parameters to the stored values.
420 */
421static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
422{
423 /* check if all parameters are alike
424 * or this is individual link(aggregation == FALSE)
425 * then update the state machine Matched variable.
426 */
427 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
428 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
429 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
430 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
431 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
432 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
433 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
434 ) {
435 port->sm_vars |= AD_PORT_MATCHED;
436 } else {
437 port->sm_vars &= ~AD_PORT_MATCHED;
438 }
439}
440
441/**
442 * __record_pdu - record parameters from a received lacpdu
443 * @lacpdu: the lacpdu we've received
444 * @port: the port we're looking at
445 *
446 * Record the parameter values for the Actor carried in a received lacpdu as
447 * the current partner operational parameter values and sets
448 * actor_oper_port_state.defaulted to FALSE.
449 */
450static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
451{
452 if (lacpdu && port) {
453 struct port_params *partner = &port->partner_oper;
454
455 __choose_matched(lacpdu, port);
456 /* record the new parameter values for the partner
457 * operational
458 */
459 partner->port_number = ntohs(lacpdu->actor_port);
460 partner->port_priority = ntohs(lacpdu->actor_port_priority);
461 partner->system = lacpdu->actor_system;
462 partner->system_priority = ntohs(lacpdu->actor_system_priority);
463 partner->key = ntohs(lacpdu->actor_key);
464 partner->port_state = lacpdu->actor_state;
465
466 /* set actor_oper_port_state.defaulted to FALSE */
467 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
468
469 /* set the partner sync. to on if the partner is sync,
470 * and the port is matched
471 */
472 if ((port->sm_vars & AD_PORT_MATCHED)
473 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
474 partner->port_state |= AD_STATE_SYNCHRONIZATION;
475 else
476 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
477 }
478}
479
480/**
481 * __record_default - record default parameters
482 * @port: the port we're looking at
483 *
484 * This function records the default parameter values for the partner carried
485 * in the Partner Admin parameters as the current partner operational parameter
486 * values and sets actor_oper_port_state.defaulted to TRUE.
487 */
488static void __record_default(struct port *port)
489{
490 if (port) {
491 /* record the partner admin parameters */
492 memcpy(&port->partner_oper, &port->partner_admin,
493 sizeof(struct port_params));
494
495 /* set actor_oper_port_state.defaulted to true */
496 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
497 }
498}
499
500/**
501 * __update_selected - update a port's Selected variable from a received lacpdu
502 * @lacpdu: the lacpdu we've received
503 * @port: the port we're looking at
504 *
505 * Update the value of the selected variable, using parameter values from a
506 * newly received lacpdu. The parameter values for the Actor carried in the
507 * received PDU are compared with the corresponding operational parameter
508 * values for the ports partner. If one or more of the comparisons shows that
509 * the value(s) received in the PDU differ from the current operational values,
510 * then selected is set to FALSE and actor_oper_port_state.synchronization is
511 * set to out_of_sync. Otherwise, selected remains unchanged.
512 */
513static void __update_selected(struct lacpdu *lacpdu, struct port *port)
514{
515 if (lacpdu && port) {
516 const struct port_params *partner = &port->partner_oper;
517
518 /* check if any parameter is different then
519 * update the state machine selected variable.
520 */
521 if (ntohs(lacpdu->actor_port) != partner->port_number ||
522 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
523 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
524 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
525 ntohs(lacpdu->actor_key) != partner->key ||
526 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
527 port->sm_vars &= ~AD_PORT_SELECTED;
528 }
529 }
530}
531
532/**
533 * __update_default_selected - update a port's Selected variable from Partner
534 * @port: the port we're looking at
535 *
536 * This function updates the value of the selected variable, using the partner
537 * administrative parameter values. The administrative values are compared with
538 * the corresponding operational parameter values for the partner. If one or
539 * more of the comparisons shows that the administrative value(s) differ from
540 * the current operational values, then Selected is set to FALSE and
541 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
542 * Selected remains unchanged.
543 */
544static void __update_default_selected(struct port *port)
545{
546 if (port) {
547 const struct port_params *admin = &port->partner_admin;
548 const struct port_params *oper = &port->partner_oper;
549
550 /* check if any parameter is different then
551 * update the state machine selected variable.
552 */
553 if (admin->port_number != oper->port_number ||
554 admin->port_priority != oper->port_priority ||
555 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
556 admin->system_priority != oper->system_priority ||
557 admin->key != oper->key ||
558 (admin->port_state & AD_STATE_AGGREGATION)
559 != (oper->port_state & AD_STATE_AGGREGATION)) {
560 port->sm_vars &= ~AD_PORT_SELECTED;
561 }
562 }
563}
564
565/**
566 * __update_ntt - update a port's ntt variable from a received lacpdu
567 * @lacpdu: the lacpdu we've received
568 * @port: the port we're looking at
569 *
570 * Updates the value of the ntt variable, using parameter values from a newly
571 * received lacpdu. The parameter values for the partner carried in the
572 * received PDU are compared with the corresponding operational parameter
573 * values for the Actor. If one or more of the comparisons shows that the
574 * value(s) received in the PDU differ from the current operational values,
575 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
576 */
577static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
578{
579 /* validate lacpdu and port */
580 if (lacpdu && port) {
581 /* check if any parameter is different then
582 * update the port->ntt.
583 */
584 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
585 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
586 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
587 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
588 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
589 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
590 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
591 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
592 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
593 ) {
594 port->ntt = true;
595 }
596 }
597}
598
599/**
600 * __agg_ports_are_ready - check if all ports in an aggregator are ready
601 * @aggregator: the aggregator we're looking at
602 *
603 */
604static int __agg_ports_are_ready(struct aggregator *aggregator)
605{
606 struct port *port;
607 int retval = 1;
608
609 if (aggregator) {
610 /* scan all ports in this aggregator to verfy if they are
611 * all ready.
612 */
613 for (port = aggregator->lag_ports;
614 port;
615 port = port->next_port_in_aggregator) {
616 if (!(port->sm_vars & AD_PORT_READY_N)) {
617 retval = 0;
618 break;
619 }
620 }
621 }
622
623 return retval;
624}
625
626/**
627 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
628 * @aggregator: the aggregator we're looking at
629 * @val: Should the ports' ready bit be set on or off
630 *
631 */
632static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
633{
634 struct port *port;
635
636 for (port = aggregator->lag_ports; port;
637 port = port->next_port_in_aggregator) {
638 if (val)
639 port->sm_vars |= AD_PORT_READY;
640 else
641 port->sm_vars &= ~AD_PORT_READY;
642 }
643}
644
645/**
646 * __get_agg_bandwidth - get the total bandwidth of an aggregator
647 * @aggregator: the aggregator we're looking at
648 *
649 */
650static u32 __get_agg_bandwidth(struct aggregator *aggregator)
651{
652 u32 bandwidth = 0;
653
654 if (aggregator->num_of_ports) {
655 switch (__get_link_speed(aggregator->lag_ports)) {
656 case AD_LINK_SPEED_BITMASK_1MBPS:
657 bandwidth = aggregator->num_of_ports;
658 break;
659 case AD_LINK_SPEED_BITMASK_10MBPS:
660 bandwidth = aggregator->num_of_ports * 10;
661 break;
662 case AD_LINK_SPEED_BITMASK_100MBPS:
663 bandwidth = aggregator->num_of_ports * 100;
664 break;
665 case AD_LINK_SPEED_BITMASK_1000MBPS:
666 bandwidth = aggregator->num_of_ports * 1000;
667 break;
668 case AD_LINK_SPEED_BITMASK_10000MBPS:
669 bandwidth = aggregator->num_of_ports * 10000;
670 break;
671 default:
672 bandwidth = 0; /* to silence the compiler */
673 }
674 }
675 return bandwidth;
676}
677
678/**
679 * __get_active_agg - get the current active aggregator
680 * @aggregator: the aggregator we're looking at
681 *
682 * Caller must hold RCU lock.
683 */
684static struct aggregator *__get_active_agg(struct aggregator *aggregator)
685{
686 struct bonding *bond = aggregator->slave->bond;
687 struct list_head *iter;
688 struct slave *slave;
689
690 bond_for_each_slave_rcu(bond, slave, iter)
691 if (SLAVE_AD_INFO(slave).aggregator.is_active)
692 return &(SLAVE_AD_INFO(slave).aggregator);
693
694 return NULL;
695}
696
697/**
698 * __update_lacpdu_from_port - update a port's lacpdu fields
699 * @port: the port we're looking at
700 */
701static inline void __update_lacpdu_from_port(struct port *port)
702{
703 struct lacpdu *lacpdu = &port->lacpdu;
704 const struct port_params *partner = &port->partner_oper;
705
706 /* update current actual Actor parameters
707 * lacpdu->subtype initialized
708 * lacpdu->version_number initialized
709 * lacpdu->tlv_type_actor_info initialized
710 * lacpdu->actor_information_length initialized
711 */
712
713 lacpdu->actor_system_priority = htons(port->actor_system_priority);
714 lacpdu->actor_system = port->actor_system;
715 lacpdu->actor_key = htons(port->actor_oper_port_key);
716 lacpdu->actor_port_priority = htons(port->actor_port_priority);
717 lacpdu->actor_port = htons(port->actor_port_number);
718 lacpdu->actor_state = port->actor_oper_port_state;
719
720 /* lacpdu->reserved_3_1 initialized
721 * lacpdu->tlv_type_partner_info initialized
722 * lacpdu->partner_information_length initialized
723 */
724
725 lacpdu->partner_system_priority = htons(partner->system_priority);
726 lacpdu->partner_system = partner->system;
727 lacpdu->partner_key = htons(partner->key);
728 lacpdu->partner_port_priority = htons(partner->port_priority);
729 lacpdu->partner_port = htons(partner->port_number);
730 lacpdu->partner_state = partner->port_state;
731
732 /* lacpdu->reserved_3_2 initialized
733 * lacpdu->tlv_type_collector_info initialized
734 * lacpdu->collector_information_length initialized
735 * collector_max_delay initialized
736 * reserved_12[12] initialized
737 * tlv_type_terminator initialized
738 * terminator_length initialized
739 * reserved_50[50] initialized
740 */
741}
742
743/* ================= main 802.3ad protocol code ========================= */
744
745/**
746 * ad_lacpdu_send - send out a lacpdu packet on a given port
747 * @port: the port we're looking at
748 *
749 * Returns: 0 on success
750 * < 0 on error
751 */
752static int ad_lacpdu_send(struct port *port)
753{
754 struct slave *slave = port->slave;
755 struct sk_buff *skb;
756 struct lacpdu_header *lacpdu_header;
757 int length = sizeof(struct lacpdu_header);
758
759 skb = dev_alloc_skb(length);
760 if (!skb)
761 return -ENOMEM;
762
763 skb->dev = slave->dev;
764 skb_reset_mac_header(skb);
765 skb->network_header = skb->mac_header + ETH_HLEN;
766 skb->protocol = PKT_TYPE_LACPDU;
767 skb->priority = TC_PRIO_CONTROL;
768
769 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
770
771 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
772 /* Note: source address is set to be the member's PERMANENT address,
773 * because we use it to identify loopback lacpdus in receive.
774 */
775 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
776 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
777
778 lacpdu_header->lacpdu = port->lacpdu;
779
780 dev_queue_xmit(skb);
781
782 return 0;
783}
784
785/**
786 * ad_marker_send - send marker information/response on a given port
787 * @port: the port we're looking at
788 * @marker: marker data to send
789 *
790 * Returns: 0 on success
791 * < 0 on error
792 */
793static int ad_marker_send(struct port *port, struct bond_marker *marker)
794{
795 struct slave *slave = port->slave;
796 struct sk_buff *skb;
797 struct bond_marker_header *marker_header;
798 int length = sizeof(struct bond_marker_header);
799
800 skb = dev_alloc_skb(length + 16);
801 if (!skb)
802 return -ENOMEM;
803
804 skb_reserve(skb, 16);
805
806 skb->dev = slave->dev;
807 skb_reset_mac_header(skb);
808 skb->network_header = skb->mac_header + ETH_HLEN;
809 skb->protocol = PKT_TYPE_LACPDU;
810
811 marker_header = (struct bond_marker_header *)skb_put(skb, length);
812
813 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
814 /* Note: source address is set to be the member's PERMANENT address,
815 * because we use it to identify loopback MARKERs in receive.
816 */
817 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
818 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
819
820 marker_header->marker = *marker;
821
822 dev_queue_xmit(skb);
823
824 return 0;
825}
826
827/**
828 * ad_mux_machine - handle a port's mux state machine
829 * @port: the port we're looking at
830 */
831static void ad_mux_machine(struct port *port)
832{
833 mux_states_t last_state;
834
835 /* keep current State Machine state to compare later if it was
836 * changed
837 */
838 last_state = port->sm_mux_state;
839
840 if (port->sm_vars & AD_PORT_BEGIN) {
841 port->sm_mux_state = AD_MUX_DETACHED;
842 } else {
843 switch (port->sm_mux_state) {
844 case AD_MUX_DETACHED:
845 if ((port->sm_vars & AD_PORT_SELECTED)
846 || (port->sm_vars & AD_PORT_STANDBY))
847 /* if SELECTED or STANDBY */
848 port->sm_mux_state = AD_MUX_WAITING;
849 break;
850 case AD_MUX_WAITING:
851 /* if SELECTED == FALSE return to DETACH state */
852 if (!(port->sm_vars & AD_PORT_SELECTED)) {
853 port->sm_vars &= ~AD_PORT_READY_N;
854 /* in order to withhold the Selection Logic to
855 * check all ports READY_N value every callback
856 * cycle to update ready variable, we check
857 * READY_N and update READY here
858 */
859 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
860 port->sm_mux_state = AD_MUX_DETACHED;
861 break;
862 }
863
864 /* check if the wait_while_timer expired */
865 if (port->sm_mux_timer_counter
866 && !(--port->sm_mux_timer_counter))
867 port->sm_vars |= AD_PORT_READY_N;
868
869 /* in order to withhold the selection logic to check
870 * all ports READY_N value every callback cycle to
871 * update ready variable, we check READY_N and update
872 * READY here
873 */
874 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
875
876 /* if the wait_while_timer expired, and the port is
877 * in READY state, move to ATTACHED state
878 */
879 if ((port->sm_vars & AD_PORT_READY)
880 && !port->sm_mux_timer_counter)
881 port->sm_mux_state = AD_MUX_ATTACHED;
882 break;
883 case AD_MUX_ATTACHED:
884 /* check also if agg_select_timer expired (so the
885 * edable port will take place only after this timer)
886 */
887 if ((port->sm_vars & AD_PORT_SELECTED) &&
888 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
889 !__check_agg_selection_timer(port)) {
890 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;
891 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
892 (port->sm_vars & AD_PORT_STANDBY)) {
893 /* if UNSELECTED or STANDBY */
894 port->sm_vars &= ~AD_PORT_READY_N;
895 /* in order to withhold the selection logic to
896 * check all ports READY_N value every callback
897 * cycle to update ready variable, we check
898 * READY_N and update READY here
899 */
900 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
901 port->sm_mux_state = AD_MUX_DETACHED;
902 }
903 break;
904 case AD_MUX_COLLECTING_DISTRIBUTING:
905 if (!(port->sm_vars & AD_PORT_SELECTED) ||
906 (port->sm_vars & AD_PORT_STANDBY) ||
907 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) {
908 port->sm_mux_state = AD_MUX_ATTACHED;
909 } else {
910 /* if port state hasn't changed make
911 * sure that a collecting distributing
912 * port in an active aggregator is enabled
913 */
914 if (port->aggregator &&
915 port->aggregator->is_active &&
916 !__port_is_enabled(port)) {
917
918 __enable_port(port);
919 }
920 }
921 break;
922 default:
923 break;
924 }
925 }
926
927 /* check if the state machine was changed */
928 if (port->sm_mux_state != last_state) {
929 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
930 port->actor_port_number, last_state,
931 port->sm_mux_state);
932 switch (port->sm_mux_state) {
933 case AD_MUX_DETACHED:
934 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
935 ad_disable_collecting_distributing(port);
936 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
937 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
938 port->ntt = true;
939 break;
940 case AD_MUX_WAITING:
941 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
942 break;
943 case AD_MUX_ATTACHED:
944 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
945 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
946 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
947 ad_disable_collecting_distributing(port);
948 port->ntt = true;
949 break;
950 case AD_MUX_COLLECTING_DISTRIBUTING:
951 port->actor_oper_port_state |= AD_STATE_COLLECTING;
952 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
953 ad_enable_collecting_distributing(port);
954 port->ntt = true;
955 break;
956 default:
957 break;
958 }
959 }
960}
961
962/**
963 * ad_rx_machine - handle a port's rx State Machine
964 * @lacpdu: the lacpdu we've received
965 * @port: the port we're looking at
966 *
967 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
968 * CURRENT. If timer expired set the state machine in the proper state.
969 * In other cases, this function checks if we need to switch to other state.
970 */
971static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
972{
973 rx_states_t last_state;
974
975 /* keep current State Machine state to compare later if it was
976 * changed
977 */
978 last_state = port->sm_rx_state;
979
980 /* check if state machine should change state */
981
982 /* first, check if port was reinitialized */
983 if (port->sm_vars & AD_PORT_BEGIN)
984 port->sm_rx_state = AD_RX_INITIALIZE;
985 /* check if port is not enabled */
986 else if (!(port->sm_vars & AD_PORT_BEGIN)
987 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
988 port->sm_rx_state = AD_RX_PORT_DISABLED;
989 /* check if new lacpdu arrived */
990 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
991 (port->sm_rx_state == AD_RX_DEFAULTED) ||
992 (port->sm_rx_state == AD_RX_CURRENT))) {
993 port->sm_rx_timer_counter = 0;
994 port->sm_rx_state = AD_RX_CURRENT;
995 } else {
996 /* if timer is on, and if it is expired */
997 if (port->sm_rx_timer_counter &&
998 !(--port->sm_rx_timer_counter)) {
999 switch (port->sm_rx_state) {
1000 case AD_RX_EXPIRED:
1001 port->sm_rx_state = AD_RX_DEFAULTED;
1002 break;
1003 case AD_RX_CURRENT:
1004 port->sm_rx_state = AD_RX_EXPIRED;
1005 break;
1006 default:
1007 break;
1008 }
1009 } else {
1010 /* if no lacpdu arrived and no timer is on */
1011 switch (port->sm_rx_state) {
1012 case AD_RX_PORT_DISABLED:
1013 if (port->sm_vars & AD_PORT_MOVED)
1014 port->sm_rx_state = AD_RX_INITIALIZE;
1015 else if (port->is_enabled
1016 && (port->sm_vars
1017 & AD_PORT_LACP_ENABLED))
1018 port->sm_rx_state = AD_RX_EXPIRED;
1019 else if (port->is_enabled
1020 && ((port->sm_vars
1021 & AD_PORT_LACP_ENABLED) == 0))
1022 port->sm_rx_state = AD_RX_LACP_DISABLED;
1023 break;
1024 default:
1025 break;
1026
1027 }
1028 }
1029 }
1030
1031 /* check if the State machine was changed or new lacpdu arrived */
1032 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1033 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1034 port->actor_port_number, last_state,
1035 port->sm_rx_state);
1036 switch (port->sm_rx_state) {
1037 case AD_RX_INITIALIZE:
1038 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1039 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1040 else
1041 port->sm_vars |= AD_PORT_LACP_ENABLED;
1042 port->sm_vars &= ~AD_PORT_SELECTED;
1043 __record_default(port);
1044 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1045 port->sm_vars &= ~AD_PORT_MOVED;
1046 port->sm_rx_state = AD_RX_PORT_DISABLED;
1047
1048 /* Fall Through */
1049 case AD_RX_PORT_DISABLED:
1050 port->sm_vars &= ~AD_PORT_MATCHED;
1051 break;
1052 case AD_RX_LACP_DISABLED:
1053 port->sm_vars &= ~AD_PORT_SELECTED;
1054 __record_default(port);
1055 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1056 port->sm_vars |= AD_PORT_MATCHED;
1057 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1058 break;
1059 case AD_RX_EXPIRED:
1060 /* Reset of the Synchronization flag (Standard 43.4.12)
1061 * This reset cause to disable this port in the
1062 * COLLECTING_DISTRIBUTING state of the mux machine in
1063 * case of EXPIRED even if LINK_DOWN didn't arrive for
1064 * the port.
1065 */
1066 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1067 port->sm_vars &= ~AD_PORT_MATCHED;
1068 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1069 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1070 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1071 break;
1072 case AD_RX_DEFAULTED:
1073 __update_default_selected(port);
1074 __record_default(port);
1075 port->sm_vars |= AD_PORT_MATCHED;
1076 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1077 break;
1078 case AD_RX_CURRENT:
1079 /* detect loopback situation */
1080 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1081 &(port->actor_system))) {
1082 pr_err("%s: An illegal loopback occurred on adapter (%s)\n"
1083 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1084 port->slave->bond->dev->name,
1085 port->slave->dev->name);
1086 return;
1087 }
1088 __update_selected(lacpdu, port);
1089 __update_ntt(lacpdu, port);
1090 __record_pdu(lacpdu, port);
1091 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1093 break;
1094 default:
1095 break;
1096 }
1097 }
1098}
1099
1100/**
1101 * ad_tx_machine - handle a port's tx state machine
1102 * @port: the port we're looking at
1103 */
1104static void ad_tx_machine(struct port *port)
1105{
1106 /* check if tx timer expired, to verify that we do not send more than
1107 * 3 packets per second
1108 */
1109 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1110 /* check if there is something to send */
1111 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1112 __update_lacpdu_from_port(port);
1113
1114 if (ad_lacpdu_send(port) >= 0) {
1115 pr_debug("Sent LACPDU on port %d\n",
1116 port->actor_port_number);
1117
1118 /* mark ntt as false, so it will not be sent
1119 * again until demanded
1120 */
1121 port->ntt = false;
1122 }
1123 }
1124 /* restart tx timer(to verify that we will not exceed
1125 * AD_MAX_TX_IN_SECOND
1126 */
1127 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1128 }
1129}
1130
1131/**
1132 * ad_periodic_machine - handle a port's periodic state machine
1133 * @port: the port we're looking at
1134 *
1135 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1136 */
1137static void ad_periodic_machine(struct port *port)
1138{
1139 periodic_states_t last_state;
1140
1141 /* keep current state machine state to compare later if it was changed */
1142 last_state = port->sm_periodic_state;
1143
1144 /* check if port was reinitialized */
1145 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1146 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1147 ) {
1148 port->sm_periodic_state = AD_NO_PERIODIC;
1149 }
1150 /* check if state machine should change state */
1151 else if (port->sm_periodic_timer_counter) {
1152 /* check if periodic state machine expired */
1153 if (!(--port->sm_periodic_timer_counter)) {
1154 /* if expired then do tx */
1155 port->sm_periodic_state = AD_PERIODIC_TX;
1156 } else {
1157 /* If not expired, check if there is some new timeout
1158 * parameter from the partner state
1159 */
1160 switch (port->sm_periodic_state) {
1161 case AD_FAST_PERIODIC:
1162 if (!(port->partner_oper.port_state
1163 & AD_STATE_LACP_TIMEOUT))
1164 port->sm_periodic_state = AD_SLOW_PERIODIC;
1165 break;
1166 case AD_SLOW_PERIODIC:
1167 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1168 port->sm_periodic_timer_counter = 0;
1169 port->sm_periodic_state = AD_PERIODIC_TX;
1170 }
1171 break;
1172 default:
1173 break;
1174 }
1175 }
1176 } else {
1177 switch (port->sm_periodic_state) {
1178 case AD_NO_PERIODIC:
1179 port->sm_periodic_state = AD_FAST_PERIODIC;
1180 break;
1181 case AD_PERIODIC_TX:
1182 if (!(port->partner_oper.port_state &
1183 AD_STATE_LACP_TIMEOUT))
1184 port->sm_periodic_state = AD_SLOW_PERIODIC;
1185 else
1186 port->sm_periodic_state = AD_FAST_PERIODIC;
1187 break;
1188 default:
1189 break;
1190 }
1191 }
1192
1193 /* check if the state machine was changed */
1194 if (port->sm_periodic_state != last_state) {
1195 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1196 port->actor_port_number, last_state,
1197 port->sm_periodic_state);
1198 switch (port->sm_periodic_state) {
1199 case AD_NO_PERIODIC:
1200 port->sm_periodic_timer_counter = 0;
1201 break;
1202 case AD_FAST_PERIODIC:
1203 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1204 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1205 break;
1206 case AD_SLOW_PERIODIC:
1207 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1208 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1209 break;
1210 case AD_PERIODIC_TX:
1211 port->ntt = true;
1212 break;
1213 default:
1214 break;
1215 }
1216 }
1217}
1218
1219/**
1220 * ad_port_selection_logic - select aggregation groups
1221 * @port: the port we're looking at
1222 *
1223 * Select aggregation groups, and assign each port for it's aggregetor. The
1224 * selection logic is called in the inititalization (after all the handshkes),
1225 * and after every lacpdu receive (if selected is off).
1226 */
1227static void ad_port_selection_logic(struct port *port)
1228{
1229 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1230 struct port *last_port = NULL, *curr_port;
1231 struct list_head *iter;
1232 struct bonding *bond;
1233 struct slave *slave;
1234 int found = 0;
1235
1236 /* if the port is already Selected, do nothing */
1237 if (port->sm_vars & AD_PORT_SELECTED)
1238 return;
1239
1240 bond = __get_bond_by_port(port);
1241
1242 /* if the port is connected to other aggregator, detach it */
1243 if (port->aggregator) {
1244 /* detach the port from its former aggregator */
1245 temp_aggregator = port->aggregator;
1246 for (curr_port = temp_aggregator->lag_ports; curr_port;
1247 last_port = curr_port,
1248 curr_port = curr_port->next_port_in_aggregator) {
1249 if (curr_port == port) {
1250 temp_aggregator->num_of_ports--;
1251 /* if it is the first port attached to the
1252 * aggregator
1253 */
1254 if (!last_port) {
1255 temp_aggregator->lag_ports =
1256 port->next_port_in_aggregator;
1257 } else {
1258 /* not the first port attached to the
1259 * aggregator
1260 */
1261 last_port->next_port_in_aggregator =
1262 port->next_port_in_aggregator;
1263 }
1264
1265 /* clear the port's relations to this
1266 * aggregator
1267 */
1268 port->aggregator = NULL;
1269 port->next_port_in_aggregator = NULL;
1270 port->actor_port_aggregator_identifier = 0;
1271
1272 pr_debug("Port %d left LAG %d\n",
1273 port->actor_port_number,
1274 temp_aggregator->aggregator_identifier);
1275 /* if the aggregator is empty, clear its
1276 * parameters, and set it ready to be attached
1277 */
1278 if (!temp_aggregator->lag_ports)
1279 ad_clear_agg(temp_aggregator);
1280 break;
1281 }
1282 }
1283 if (!curr_port) {
1284 /* meaning: the port was related to an aggregator
1285 * but was not on the aggregator port list
1286 */
1287 pr_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1288 port->slave->bond->dev->name,
1289 port->actor_port_number,
1290 port->slave->dev->name,
1291 port->aggregator->aggregator_identifier);
1292 }
1293 }
1294 /* search on all aggregators for a suitable aggregator for this port */
1295 bond_for_each_slave(bond, slave, iter) {
1296 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1297
1298 /* keep a free aggregator for later use(if needed) */
1299 if (!aggregator->lag_ports) {
1300 if (!free_aggregator)
1301 free_aggregator = aggregator;
1302 continue;
1303 }
1304 /* check if current aggregator suits us */
1305 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1306 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1307 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1308 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1309 ) &&
1310 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1311 !aggregator->is_individual) /* but is not individual OR */
1312 )
1313 ) {
1314 /* attach to the founded aggregator */
1315 port->aggregator = aggregator;
1316 port->actor_port_aggregator_identifier =
1317 port->aggregator->aggregator_identifier;
1318 port->next_port_in_aggregator = aggregator->lag_ports;
1319 port->aggregator->num_of_ports++;
1320 aggregator->lag_ports = port;
1321 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1322 port->actor_port_number,
1323 port->aggregator->aggregator_identifier);
1324
1325 /* mark this port as selected */
1326 port->sm_vars |= AD_PORT_SELECTED;
1327 found = 1;
1328 break;
1329 }
1330 }
1331
1332 /* the port couldn't find an aggregator - attach it to a new
1333 * aggregator
1334 */
1335 if (!found) {
1336 if (free_aggregator) {
1337 /* assign port a new aggregator */
1338 port->aggregator = free_aggregator;
1339 port->actor_port_aggregator_identifier =
1340 port->aggregator->aggregator_identifier;
1341
1342 /* update the new aggregator's parameters
1343 * if port was responsed from the end-user
1344 */
1345 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1346 /* if port is full duplex */
1347 port->aggregator->is_individual = false;
1348 else
1349 port->aggregator->is_individual = true;
1350
1351 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1352 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1353 port->aggregator->partner_system =
1354 port->partner_oper.system;
1355 port->aggregator->partner_system_priority =
1356 port->partner_oper.system_priority;
1357 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1358 port->aggregator->receive_state = 1;
1359 port->aggregator->transmit_state = 1;
1360 port->aggregator->lag_ports = port;
1361 port->aggregator->num_of_ports++;
1362
1363 /* mark this port as selected */
1364 port->sm_vars |= AD_PORT_SELECTED;
1365
1366 pr_debug("Port %d joined LAG %d(new LAG)\n",
1367 port->actor_port_number,
1368 port->aggregator->aggregator_identifier);
1369 } else {
1370 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
1371 port->slave->bond->dev->name,
1372 port->actor_port_number, port->slave->dev->name);
1373 }
1374 }
1375 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1376 * in all aggregator's ports, else set ready=FALSE in all
1377 * aggregator's ports
1378 */
1379 __set_agg_ports_ready(port->aggregator,
1380 __agg_ports_are_ready(port->aggregator));
1381
1382 aggregator = __get_first_agg(port);
1383 ad_agg_selection_logic(aggregator);
1384}
1385
1386/* Decide if "agg" is a better choice for the new active aggregator that
1387 * the current best, according to the ad_select policy.
1388 */
1389static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1390 struct aggregator *curr)
1391{
1392 /* 0. If no best, select current.
1393 *
1394 * 1. If the current agg is not individual, and the best is
1395 * individual, select current.
1396 *
1397 * 2. If current agg is individual and the best is not, keep best.
1398 *
1399 * 3. Therefore, current and best are both individual or both not
1400 * individual, so:
1401 *
1402 * 3a. If current agg partner replied, and best agg partner did not,
1403 * select current.
1404 *
1405 * 3b. If current agg partner did not reply and best agg partner
1406 * did reply, keep best.
1407 *
1408 * 4. Therefore, current and best both have partner replies or
1409 * both do not, so perform selection policy:
1410 *
1411 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1412 * select by bandwidth.
1413 *
1414 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1415 */
1416 if (!best)
1417 return curr;
1418
1419 if (!curr->is_individual && best->is_individual)
1420 return curr;
1421
1422 if (curr->is_individual && !best->is_individual)
1423 return best;
1424
1425 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1426 return curr;
1427
1428 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1429 return best;
1430
1431 switch (__get_agg_selection_mode(curr->lag_ports)) {
1432 case BOND_AD_COUNT:
1433 if (curr->num_of_ports > best->num_of_ports)
1434 return curr;
1435
1436 if (curr->num_of_ports < best->num_of_ports)
1437 return best;
1438
1439 /*FALLTHROUGH*/
1440 case BOND_AD_STABLE:
1441 case BOND_AD_BANDWIDTH:
1442 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1443 return curr;
1444
1445 break;
1446
1447 default:
1448 pr_warn_ratelimited("%s: Impossible agg select mode %d\n",
1449 curr->slave->bond->dev->name,
1450 __get_agg_selection_mode(curr->lag_ports));
1451 break;
1452 }
1453
1454 return best;
1455}
1456
1457static int agg_device_up(const struct aggregator *agg)
1458{
1459 struct port *port = agg->lag_ports;
1460
1461 if (!port)
1462 return 0;
1463
1464 return netif_running(port->slave->dev) &&
1465 netif_carrier_ok(port->slave->dev);
1466}
1467
1468/**
1469 * ad_agg_selection_logic - select an aggregation group for a team
1470 * @aggregator: the aggregator we're looking at
1471 *
1472 * It is assumed that only one aggregator may be selected for a team.
1473 *
1474 * The logic of this function is to select the aggregator according to
1475 * the ad_select policy:
1476 *
1477 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1478 * it, and to reselect the active aggregator only if the previous
1479 * aggregator has no more ports related to it.
1480 *
1481 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1482 * bandwidth, and reselect whenever a link state change takes place or the
1483 * set of slaves in the bond changes.
1484 *
1485 * BOND_AD_COUNT: select the aggregator with largest number of ports
1486 * (slaves), and reselect whenever a link state change takes place or the
1487 * set of slaves in the bond changes.
1488 *
1489 * FIXME: this function MUST be called with the first agg in the bond, or
1490 * __get_active_agg() won't work correctly. This function should be better
1491 * called with the bond itself, and retrieve the first agg from it.
1492 */
1493static void ad_agg_selection_logic(struct aggregator *agg)
1494{
1495 struct aggregator *best, *active, *origin;
1496 struct bonding *bond = agg->slave->bond;
1497 struct list_head *iter;
1498 struct slave *slave;
1499 struct port *port;
1500
1501 rcu_read_lock();
1502 origin = agg;
1503 active = __get_active_agg(agg);
1504 best = (active && agg_device_up(active)) ? active : NULL;
1505
1506 bond_for_each_slave_rcu(bond, slave, iter) {
1507 agg = &(SLAVE_AD_INFO(slave).aggregator);
1508
1509 agg->is_active = 0;
1510
1511 if (agg->num_of_ports && agg_device_up(agg))
1512 best = ad_agg_selection_test(best, agg);
1513 }
1514
1515 if (best &&
1516 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1517 /* For the STABLE policy, don't replace the old active
1518 * aggregator if it's still active (it has an answering
1519 * partner) or if both the best and active don't have an
1520 * answering partner.
1521 */
1522 if (active && active->lag_ports &&
1523 active->lag_ports->is_enabled &&
1524 (__agg_has_partner(active) ||
1525 (!__agg_has_partner(active) &&
1526 !__agg_has_partner(best)))) {
1527 if (!(!active->actor_oper_aggregator_key &&
1528 best->actor_oper_aggregator_key)) {
1529 best = NULL;
1530 active->is_active = 1;
1531 }
1532 }
1533 }
1534
1535 if (best && (best == active)) {
1536 best = NULL;
1537 active->is_active = 1;
1538 }
1539
1540 /* if there is new best aggregator, activate it */
1541 if (best) {
1542 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1543 best->aggregator_identifier, best->num_of_ports,
1544 best->actor_oper_aggregator_key,
1545 best->partner_oper_aggregator_key,
1546 best->is_individual, best->is_active);
1547 pr_debug("best ports %p slave %p %s\n",
1548 best->lag_ports, best->slave,
1549 best->slave ? best->slave->dev->name : "NULL");
1550
1551 bond_for_each_slave_rcu(bond, slave, iter) {
1552 agg = &(SLAVE_AD_INFO(slave).aggregator);
1553
1554 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1555 agg->aggregator_identifier, agg->num_of_ports,
1556 agg->actor_oper_aggregator_key,
1557 agg->partner_oper_aggregator_key,
1558 agg->is_individual, agg->is_active);
1559 }
1560
1561 /* check if any partner replys */
1562 if (best->is_individual) {
1563 pr_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1564 best->slave ?
1565 best->slave->bond->dev->name : "NULL");
1566 }
1567
1568 best->is_active = 1;
1569 pr_debug("LAG %d chosen as the active LAG\n",
1570 best->aggregator_identifier);
1571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1572 best->aggregator_identifier, best->num_of_ports,
1573 best->actor_oper_aggregator_key,
1574 best->partner_oper_aggregator_key,
1575 best->is_individual, best->is_active);
1576
1577 /* disable the ports that were related to the former
1578 * active_aggregator
1579 */
1580 if (active) {
1581 for (port = active->lag_ports; port;
1582 port = port->next_port_in_aggregator) {
1583 __disable_port(port);
1584 }
1585 }
1586 }
1587
1588 /* if the selected aggregator is of join individuals
1589 * (partner_system is NULL), enable their ports
1590 */
1591 active = __get_active_agg(origin);
1592
1593 if (active) {
1594 if (!__agg_has_partner(active)) {
1595 for (port = active->lag_ports; port;
1596 port = port->next_port_in_aggregator) {
1597 __enable_port(port);
1598 }
1599 }
1600 }
1601
1602 rcu_read_unlock();
1603
1604 bond_3ad_set_carrier(bond);
1605}
1606
1607/**
1608 * ad_clear_agg - clear a given aggregator's parameters
1609 * @aggregator: the aggregator we're looking at
1610 */
1611static void ad_clear_agg(struct aggregator *aggregator)
1612{
1613 if (aggregator) {
1614 aggregator->is_individual = false;
1615 aggregator->actor_admin_aggregator_key = 0;
1616 aggregator->actor_oper_aggregator_key = 0;
1617 aggregator->partner_system = null_mac_addr;
1618 aggregator->partner_system_priority = 0;
1619 aggregator->partner_oper_aggregator_key = 0;
1620 aggregator->receive_state = 0;
1621 aggregator->transmit_state = 0;
1622 aggregator->lag_ports = NULL;
1623 aggregator->is_active = 0;
1624 aggregator->num_of_ports = 0;
1625 pr_debug("LAG %d was cleared\n",
1626 aggregator->aggregator_identifier);
1627 }
1628}
1629
1630/**
1631 * ad_initialize_agg - initialize a given aggregator's parameters
1632 * @aggregator: the aggregator we're looking at
1633 */
1634static void ad_initialize_agg(struct aggregator *aggregator)
1635{
1636 if (aggregator) {
1637 ad_clear_agg(aggregator);
1638
1639 aggregator->aggregator_mac_address = null_mac_addr;
1640 aggregator->aggregator_identifier = 0;
1641 aggregator->slave = NULL;
1642 }
1643}
1644
1645/**
1646 * ad_initialize_port - initialize a given port's parameters
1647 * @aggregator: the aggregator we're looking at
1648 * @lacp_fast: boolean. whether fast periodic should be used
1649 */
1650static void ad_initialize_port(struct port *port, int lacp_fast)
1651{
1652 static const struct port_params tmpl = {
1653 .system_priority = 0xffff,
1654 .key = 1,
1655 .port_number = 1,
1656 .port_priority = 0xff,
1657 .port_state = 1,
1658 };
1659 static const struct lacpdu lacpdu = {
1660 .subtype = 0x01,
1661 .version_number = 0x01,
1662 .tlv_type_actor_info = 0x01,
1663 .actor_information_length = 0x14,
1664 .tlv_type_partner_info = 0x02,
1665 .partner_information_length = 0x14,
1666 .tlv_type_collector_info = 0x03,
1667 .collector_information_length = 0x10,
1668 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1669 };
1670
1671 if (port) {
1672 port->actor_port_number = 1;
1673 port->actor_port_priority = 0xff;
1674 port->actor_system = null_mac_addr;
1675 port->actor_system_priority = 0xffff;
1676 port->actor_port_aggregator_identifier = 0;
1677 port->ntt = false;
1678 port->actor_admin_port_key = 1;
1679 port->actor_oper_port_key = 1;
1680 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1681 AD_STATE_LACP_ACTIVITY;
1682 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1683 AD_STATE_LACP_ACTIVITY;
1684
1685 if (lacp_fast)
1686 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1687
1688 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1689 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1690
1691 port->is_enabled = true;
1692 /* private parameters */
1693 port->sm_vars = 0x3;
1694 port->sm_rx_state = 0;
1695 port->sm_rx_timer_counter = 0;
1696 port->sm_periodic_state = 0;
1697 port->sm_periodic_timer_counter = 0;
1698 port->sm_mux_state = 0;
1699 port->sm_mux_timer_counter = 0;
1700 port->sm_tx_state = 0;
1701 port->sm_tx_timer_counter = 0;
1702 port->slave = NULL;
1703 port->aggregator = NULL;
1704 port->next_port_in_aggregator = NULL;
1705 port->transaction_id = 0;
1706
1707 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1708 }
1709}
1710
1711/**
1712 * ad_enable_collecting_distributing - enable a port's transmit/receive
1713 * @port: the port we're looking at
1714 *
1715 * Enable @port if it's in an active aggregator
1716 */
1717static void ad_enable_collecting_distributing(struct port *port)
1718{
1719 if (port->aggregator->is_active) {
1720 pr_debug("Enabling port %d(LAG %d)\n",
1721 port->actor_port_number,
1722 port->aggregator->aggregator_identifier);
1723 __enable_port(port);
1724 }
1725}
1726
1727/**
1728 * ad_disable_collecting_distributing - disable a port's transmit/receive
1729 * @port: the port we're looking at
1730 */
1731static void ad_disable_collecting_distributing(struct port *port)
1732{
1733 if (port->aggregator &&
1734 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1735 &(null_mac_addr))) {
1736 pr_debug("Disabling port %d(LAG %d)\n",
1737 port->actor_port_number,
1738 port->aggregator->aggregator_identifier);
1739 __disable_port(port);
1740 }
1741}
1742
1743/**
1744 * ad_marker_info_received - handle receive of a Marker information frame
1745 * @marker_info: Marker info received
1746 * @port: the port we're looking at
1747 */
1748static void ad_marker_info_received(struct bond_marker *marker_info,
1749 struct port *port)
1750{
1751 struct bond_marker marker;
1752
1753 /* copy the received marker data to the response marker */
1754 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1755 /* change the marker subtype to marker response */
1756 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1757
1758 /* send the marker response */
1759 if (ad_marker_send(port, &marker) >= 0) {
1760 pr_debug("Sent Marker Response on port %d\n",
1761 port->actor_port_number);
1762 }
1763}
1764
1765/**
1766 * ad_marker_response_received - handle receive of a marker response frame
1767 * @marker: marker PDU received
1768 * @port: the port we're looking at
1769 *
1770 * This function does nothing since we decided not to implement send and handle
1771 * response for marker PDU's, in this stage, but only to respond to marker
1772 * information.
1773 */
1774static void ad_marker_response_received(struct bond_marker *marker,
1775 struct port *port)
1776{
1777 marker = NULL;
1778 port = NULL;
1779 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1780}
1781
1782/* ========= AD exported functions to the main bonding code ========= */
1783
1784/* Check aggregators status in team every T seconds */
1785#define AD_AGGREGATOR_SELECTION_TIMER 8
1786
1787/**
1788 * bond_3ad_initiate_agg_selection - initate aggregator selection
1789 * @bond: bonding struct
1790 *
1791 * Set the aggregation selection timer, to initiate an agg selection in
1792 * the very near future. Called during first initialization, and during
1793 * any down to up transitions of the bond.
1794 */
1795void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1796{
1797 BOND_AD_INFO(bond).agg_select_timer = timeout;
1798}
1799
1800/**
1801 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1802 * @bond: bonding struct to work on
1803 * @tick_resolution: tick duration (millisecond resolution)
1804 *
1805 * Can be called only after the mac address of the bond is set.
1806 */
1807void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1808{
1809 /* check that the bond is not initialized yet */
1810 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1811 bond->dev->dev_addr)) {
1812
1813 BOND_AD_INFO(bond).aggregator_identifier = 0;
1814
1815 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1816 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1817
1818 /* initialize how many times this module is called in one
1819 * second (should be about every 100ms)
1820 */
1821 ad_ticks_per_sec = tick_resolution;
1822
1823 bond_3ad_initiate_agg_selection(bond,
1824 AD_AGGREGATOR_SELECTION_TIMER *
1825 ad_ticks_per_sec);
1826 }
1827}
1828
1829/**
1830 * bond_3ad_bind_slave - initialize a slave's port
1831 * @slave: slave struct to work on
1832 *
1833 * Returns: 0 on success
1834 * < 0 on error
1835 */
1836void bond_3ad_bind_slave(struct slave *slave)
1837{
1838 struct bonding *bond = bond_get_bond_by_slave(slave);
1839 struct port *port;
1840 struct aggregator *aggregator;
1841
1842 /* check that the slave has not been initialized yet. */
1843 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1844
1845 /* port initialization */
1846 port = &(SLAVE_AD_INFO(slave).port);
1847
1848 ad_initialize_port(port, bond->params.lacp_fast);
1849
1850 __initialize_port_locks(slave);
1851 port->slave = slave;
1852 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1853 /* key is determined according to the link speed, duplex and user key(which
1854 * is yet not supported)
1855 */
1856 port->actor_admin_port_key = 0;
1857 port->actor_admin_port_key |= __get_duplex(port);
1858 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1859 port->actor_oper_port_key = port->actor_admin_port_key;
1860 /* if the port is not full duplex, then the port should be not
1861 * lacp Enabled
1862 */
1863 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1864 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1865 /* actor system is the bond's system */
1866 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1867 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1868 * lacpdu's are sent in one second)
1869 */
1870 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1871 port->aggregator = NULL;
1872 port->next_port_in_aggregator = NULL;
1873
1874 __disable_port(port);
1875
1876 /* aggregator initialization */
1877 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1878
1879 ad_initialize_agg(aggregator);
1880
1881 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1882 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1883 aggregator->slave = slave;
1884 aggregator->is_active = 0;
1885 aggregator->num_of_ports = 0;
1886 }
1887}
1888
1889/**
1890 * bond_3ad_unbind_slave - deinitialize a slave's port
1891 * @slave: slave struct to work on
1892 *
1893 * Search for the aggregator that is related to this port, remove the
1894 * aggregator and assign another aggregator for other port related to it
1895 * (if any), and remove the port.
1896 */
1897void bond_3ad_unbind_slave(struct slave *slave)
1898{
1899 struct port *port, *prev_port, *temp_port;
1900 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1901 int select_new_active_agg = 0;
1902 struct bonding *bond = slave->bond;
1903 struct slave *slave_iter;
1904 struct list_head *iter;
1905
1906 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1907 port = &(SLAVE_AD_INFO(slave).port);
1908
1909 /* if slave is null, the whole port is not initialized */
1910 if (!port->slave) {
1911 pr_warn("Warning: %s: Trying to unbind an uninitialized port on %s\n",
1912 slave->bond->dev->name, slave->dev->name);
1913 return;
1914 }
1915
1916 pr_debug("Unbinding Link Aggregation Group %d\n",
1917 aggregator->aggregator_identifier);
1918
1919 /* Tell the partner that this port is not suitable for aggregation */
1920 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1921 __update_lacpdu_from_port(port);
1922 ad_lacpdu_send(port);
1923
1924 /* check if this aggregator is occupied */
1925 if (aggregator->lag_ports) {
1926 /* check if there are other ports related to this aggregator
1927 * except the port related to this slave(thats ensure us that
1928 * there is a reason to search for new aggregator, and that we
1929 * will find one
1930 */
1931 if ((aggregator->lag_ports != port) ||
1932 (aggregator->lag_ports->next_port_in_aggregator)) {
1933 /* find new aggregator for the related port(s) */
1934 bond_for_each_slave(bond, slave_iter, iter) {
1935 new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
1936 /* if the new aggregator is empty, or it is
1937 * connected to our port only
1938 */
1939 if (!new_aggregator->lag_ports ||
1940 ((new_aggregator->lag_ports == port) &&
1941 !new_aggregator->lag_ports->next_port_in_aggregator))
1942 break;
1943 }
1944 if (!slave_iter)
1945 new_aggregator = NULL;
1946
1947 /* if new aggregator found, copy the aggregator's
1948 * parameters and connect the related lag_ports to the
1949 * new aggregator
1950 */
1951 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
1952 pr_debug("Some port(s) related to LAG %d - replacing with LAG %d\n",
1953 aggregator->aggregator_identifier,
1954 new_aggregator->aggregator_identifier);
1955
1956 if ((new_aggregator->lag_ports == port) &&
1957 new_aggregator->is_active) {
1958 pr_info("%s: Removing an active aggregator\n",
1959 aggregator->slave->bond->dev->name);
1960 select_new_active_agg = 1;
1961 }
1962
1963 new_aggregator->is_individual = aggregator->is_individual;
1964 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
1965 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
1966 new_aggregator->partner_system = aggregator->partner_system;
1967 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
1968 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
1969 new_aggregator->receive_state = aggregator->receive_state;
1970 new_aggregator->transmit_state = aggregator->transmit_state;
1971 new_aggregator->lag_ports = aggregator->lag_ports;
1972 new_aggregator->is_active = aggregator->is_active;
1973 new_aggregator->num_of_ports = aggregator->num_of_ports;
1974
1975 /* update the information that is written on
1976 * the ports about the aggregator
1977 */
1978 for (temp_port = aggregator->lag_ports; temp_port;
1979 temp_port = temp_port->next_port_in_aggregator) {
1980 temp_port->aggregator = new_aggregator;
1981 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
1982 }
1983
1984 ad_clear_agg(aggregator);
1985
1986 if (select_new_active_agg)
1987 ad_agg_selection_logic(__get_first_agg(port));
1988 } else {
1989 pr_warn("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
1990 slave->bond->dev->name);
1991 }
1992 } else {
1993 /* in case that the only port related to this
1994 * aggregator is the one we want to remove
1995 */
1996 select_new_active_agg = aggregator->is_active;
1997 ad_clear_agg(aggregator);
1998 if (select_new_active_agg) {
1999 pr_info("%s: Removing an active aggregator\n",
2000 slave->bond->dev->name);
2001 /* select new active aggregator */
2002 temp_aggregator = __get_first_agg(port);
2003 if (temp_aggregator)
2004 ad_agg_selection_logic(temp_aggregator);
2005 }
2006 }
2007 }
2008
2009 pr_debug("Unbinding port %d\n", port->actor_port_number);
2010
2011 /* find the aggregator that this port is connected to */
2012 bond_for_each_slave(bond, slave_iter, iter) {
2013 temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
2014 prev_port = NULL;
2015 /* search the port in the aggregator's related ports */
2016 for (temp_port = temp_aggregator->lag_ports; temp_port;
2017 prev_port = temp_port,
2018 temp_port = temp_port->next_port_in_aggregator) {
2019 if (temp_port == port) {
2020 /* the aggregator found - detach the port from
2021 * this aggregator
2022 */
2023 if (prev_port)
2024 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2025 else
2026 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2027 temp_aggregator->num_of_ports--;
2028 if (temp_aggregator->num_of_ports == 0) {
2029 select_new_active_agg = temp_aggregator->is_active;
2030 ad_clear_agg(temp_aggregator);
2031 if (select_new_active_agg) {
2032 pr_info("%s: Removing an active aggregator\n",
2033 slave->bond->dev->name);
2034 /* select new active aggregator */
2035 ad_agg_selection_logic(__get_first_agg(port));
2036 }
2037 }
2038 break;
2039 }
2040 }
2041 }
2042 port->slave = NULL;
2043}
2044
2045/**
2046 * bond_3ad_state_machine_handler - handle state machines timeout
2047 * @bond: bonding struct to work on
2048 *
2049 * The state machine handling concept in this module is to check every tick
2050 * which state machine should operate any function. The execution order is
2051 * round robin, so when we have an interaction between state machines, the
2052 * reply of one to each other might be delayed until next tick.
2053 *
2054 * This function also complete the initialization when the agg_select_timer
2055 * times out, and it selects an aggregator for the ports that are yet not
2056 * related to any aggregator, and selects the active aggregator for a bond.
2057 */
2058void bond_3ad_state_machine_handler(struct work_struct *work)
2059{
2060 struct bonding *bond = container_of(work, struct bonding,
2061 ad_work.work);
2062 struct aggregator *aggregator;
2063 struct list_head *iter;
2064 struct slave *slave;
2065 struct port *port;
2066 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2067
2068 read_lock(&bond->lock);
2069 rcu_read_lock();
2070
2071 /* check if there are any slaves */
2072 if (!bond_has_slaves(bond))
2073 goto re_arm;
2074
2075 /* check if agg_select_timer timer after initialize is timed out */
2076 if (BOND_AD_INFO(bond).agg_select_timer &&
2077 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2078 slave = bond_first_slave_rcu(bond);
2079 port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL;
2080
2081 /* select the active aggregator for the bond */
2082 if (port) {
2083 if (!port->slave) {
2084 pr_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2085 bond->dev->name);
2086 goto re_arm;
2087 }
2088
2089 aggregator = __get_first_agg(port);
2090 ad_agg_selection_logic(aggregator);
2091 }
2092 bond_3ad_set_carrier(bond);
2093 }
2094
2095 /* for each port run the state machines */
2096 bond_for_each_slave_rcu(bond, slave, iter) {
2097 port = &(SLAVE_AD_INFO(slave).port);
2098 if (!port->slave) {
2099 pr_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2100 bond->dev->name);
2101 goto re_arm;
2102 }
2103
2104 /* Lock around state machines to protect data accessed
2105 * by all (e.g., port->sm_vars). ad_rx_machine may run
2106 * concurrently due to incoming LACPDU.
2107 */
2108 __get_state_machine_lock(port);
2109
2110 ad_rx_machine(NULL, port);
2111 ad_periodic_machine(port);
2112 ad_port_selection_logic(port);
2113 ad_mux_machine(port);
2114 ad_tx_machine(port);
2115
2116 /* turn off the BEGIN bit, since we already handled it */
2117 if (port->sm_vars & AD_PORT_BEGIN)
2118 port->sm_vars &= ~AD_PORT_BEGIN;
2119
2120 __release_state_machine_lock(port);
2121 }
2122
2123re_arm:
2124 bond_for_each_slave_rcu(bond, slave, iter) {
2125 if (slave->should_notify) {
2126 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2127 break;
2128 }
2129 }
2130 rcu_read_unlock();
2131 read_unlock(&bond->lock);
2132
2133 if (should_notify_rtnl && rtnl_trylock()) {
2134 bond_slave_state_notify(bond);
2135 rtnl_unlock();
2136 }
2137 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2138}
2139
2140/**
2141 * bond_3ad_rx_indication - handle a received frame
2142 * @lacpdu: received lacpdu
2143 * @slave: slave struct to work on
2144 * @length: length of the data received
2145 *
2146 * It is assumed that frames that were sent on this NIC don't returned as new
2147 * received frames (loopback). Since only the payload is given to this
2148 * function, it check for loopback.
2149 */
2150static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2151 u16 length)
2152{
2153 struct port *port;
2154 int ret = RX_HANDLER_ANOTHER;
2155
2156 if (length >= sizeof(struct lacpdu)) {
2157
2158 port = &(SLAVE_AD_INFO(slave).port);
2159
2160 if (!port->slave) {
2161 pr_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2162 slave->dev->name, slave->bond->dev->name);
2163 return ret;
2164 }
2165
2166 switch (lacpdu->subtype) {
2167 case AD_TYPE_LACPDU:
2168 ret = RX_HANDLER_CONSUMED;
2169 pr_debug("Received LACPDU on port %d\n",
2170 port->actor_port_number);
2171 /* Protect against concurrent state machines */
2172 __get_state_machine_lock(port);
2173 ad_rx_machine(lacpdu, port);
2174 __release_state_machine_lock(port);
2175 break;
2176
2177 case AD_TYPE_MARKER:
2178 ret = RX_HANDLER_CONSUMED;
2179 /* No need to convert fields to Little Endian since we
2180 * don't use the marker's fields.
2181 */
2182
2183 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2184 case AD_MARKER_INFORMATION_SUBTYPE:
2185 pr_debug("Received Marker Information on port %d\n",
2186 port->actor_port_number);
2187 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2188 break;
2189
2190 case AD_MARKER_RESPONSE_SUBTYPE:
2191 pr_debug("Received Marker Response on port %d\n",
2192 port->actor_port_number);
2193 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2194 break;
2195
2196 default:
2197 pr_debug("Received an unknown Marker subtype on slot %d\n",
2198 port->actor_port_number);
2199 }
2200 }
2201 }
2202 return ret;
2203}
2204
2205/**
2206 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2207 * @slave: slave struct to work on
2208 *
2209 * Handle reselection of aggregator (if needed) for this port.
2210 */
2211void bond_3ad_adapter_speed_changed(struct slave *slave)
2212{
2213 struct port *port;
2214
2215 port = &(SLAVE_AD_INFO(slave).port);
2216
2217 /* if slave is null, the whole port is not initialized */
2218 if (!port->slave) {
2219 pr_warn("Warning: %s: speed changed for uninitialized port on %s\n",
2220 slave->bond->dev->name, slave->dev->name);
2221 return;
2222 }
2223
2224 __get_state_machine_lock(port);
2225
2226 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2227 port->actor_oper_port_key = port->actor_admin_port_key |=
2228 (__get_link_speed(port) << 1);
2229 pr_debug("Port %d changed speed\n", port->actor_port_number);
2230 /* there is no need to reselect a new aggregator, just signal the
2231 * state machines to reinitialize
2232 */
2233 port->sm_vars |= AD_PORT_BEGIN;
2234
2235 __release_state_machine_lock(port);
2236}
2237
2238/**
2239 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2240 * @slave: slave struct to work on
2241 *
2242 * Handle reselection of aggregator (if needed) for this port.
2243 */
2244void bond_3ad_adapter_duplex_changed(struct slave *slave)
2245{
2246 struct port *port;
2247
2248 port = &(SLAVE_AD_INFO(slave).port);
2249
2250 /* if slave is null, the whole port is not initialized */
2251 if (!port->slave) {
2252 pr_warn("%s: Warning: duplex changed for uninitialized port on %s\n",
2253 slave->bond->dev->name, slave->dev->name);
2254 return;
2255 }
2256
2257 __get_state_machine_lock(port);
2258
2259 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2260 port->actor_oper_port_key = port->actor_admin_port_key |=
2261 __get_duplex(port);
2262 pr_debug("Port %d changed duplex\n", port->actor_port_number);
2263 /* there is no need to reselect a new aggregator, just signal the
2264 * state machines to reinitialize
2265 */
2266 port->sm_vars |= AD_PORT_BEGIN;
2267
2268 __release_state_machine_lock(port);
2269}
2270
2271/**
2272 * bond_3ad_handle_link_change - handle a slave's link status change indication
2273 * @slave: slave struct to work on
2274 * @status: whether the link is now up or down
2275 *
2276 * Handle reselection of aggregator (if needed) for this port.
2277 */
2278void bond_3ad_handle_link_change(struct slave *slave, char link)
2279{
2280 struct port *port;
2281
2282 port = &(SLAVE_AD_INFO(slave).port);
2283
2284 /* if slave is null, the whole port is not initialized */
2285 if (!port->slave) {
2286 pr_warn("Warning: %s: link status changed for uninitialized port on %s\n",
2287 slave->bond->dev->name, slave->dev->name);
2288 return;
2289 }
2290
2291 __get_state_machine_lock(port);
2292 /* on link down we are zeroing duplex and speed since
2293 * some of the adaptors(ce1000.lan) report full duplex/speed
2294 * instead of N/A(duplex) / 0(speed).
2295 *
2296 * on link up we are forcing recheck on the duplex and speed since
2297 * some of he adaptors(ce1000.lan) report.
2298 */
2299 if (link == BOND_LINK_UP) {
2300 port->is_enabled = true;
2301 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2302 port->actor_oper_port_key = port->actor_admin_port_key |=
2303 __get_duplex(port);
2304 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2305 port->actor_oper_port_key = port->actor_admin_port_key |=
2306 (__get_link_speed(port) << 1);
2307 } else {
2308 /* link has failed */
2309 port->is_enabled = false;
2310 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2311 port->actor_oper_port_key = (port->actor_admin_port_key &=
2312 ~AD_SPEED_KEY_BITS);
2313 }
2314 pr_debug("Port %d changed link status to %s\n",
2315 port->actor_port_number,
2316 link == BOND_LINK_UP ? "UP" : "DOWN");
2317 /* there is no need to reselect a new aggregator, just signal the
2318 * state machines to reinitialize
2319 */
2320 port->sm_vars |= AD_PORT_BEGIN;
2321
2322 __release_state_machine_lock(port);
2323}
2324
2325/**
2326 * bond_3ad_set_carrier - set link state for bonding master
2327 * @bond - bonding structure
2328 *
2329 * if we have an active aggregator, we're up, if not, we're down.
2330 * Presumes that we cannot have an active aggregator if there are
2331 * no slaves with link up.
2332 *
2333 * This behavior complies with IEEE 802.3 section 43.3.9.
2334 *
2335 * Called by bond_set_carrier(). Return zero if carrier state does not
2336 * change, nonzero if it does.
2337 */
2338int bond_3ad_set_carrier(struct bonding *bond)
2339{
2340 struct aggregator *active;
2341 struct slave *first_slave;
2342 int ret = 1;
2343
2344 rcu_read_lock();
2345 first_slave = bond_first_slave_rcu(bond);
2346 if (!first_slave) {
2347 ret = 0;
2348 goto out;
2349 }
2350 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator));
2351 if (active) {
2352 /* are enough slaves available to consider link up? */
2353 if (active->num_of_ports < bond->params.min_links) {
2354 if (netif_carrier_ok(bond->dev)) {
2355 netif_carrier_off(bond->dev);
2356 goto out;
2357 }
2358 } else if (!netif_carrier_ok(bond->dev)) {
2359 netif_carrier_on(bond->dev);
2360 goto out;
2361 }
2362 } else if (netif_carrier_ok(bond->dev)) {
2363 netif_carrier_off(bond->dev);
2364 }
2365out:
2366 rcu_read_unlock();
2367 return ret;
2368}
2369
2370/**
2371 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2372 * @bond: bonding struct to work on
2373 * @ad_info: ad_info struct to fill with the bond's info
2374 *
2375 * Returns: 0 on success
2376 * < 0 on error
2377 */
2378int __bond_3ad_get_active_agg_info(struct bonding *bond,
2379 struct ad_info *ad_info)
2380{
2381 struct aggregator *aggregator = NULL;
2382 struct list_head *iter;
2383 struct slave *slave;
2384 struct port *port;
2385
2386 bond_for_each_slave_rcu(bond, slave, iter) {
2387 port = &(SLAVE_AD_INFO(slave).port);
2388 if (port->aggregator && port->aggregator->is_active) {
2389 aggregator = port->aggregator;
2390 break;
2391 }
2392 }
2393
2394 if (!aggregator)
2395 return -1;
2396
2397 ad_info->aggregator_id = aggregator->aggregator_identifier;
2398 ad_info->ports = aggregator->num_of_ports;
2399 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2400 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2401 ether_addr_copy(ad_info->partner_system,
2402 aggregator->partner_system.mac_addr_value);
2403 return 0;
2404}
2405
2406/* Wrapper used to hold bond->lock so no slave manipulation can occur */
2407int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2408{
2409 int ret;
2410
2411 rcu_read_lock();
2412 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2413 rcu_read_unlock();
2414
2415 return ret;
2416}
2417
2418int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2419{
2420 struct bonding *bond = netdev_priv(dev);
2421 struct slave *slave, *first_ok_slave;
2422 struct aggregator *agg;
2423 struct ad_info ad_info;
2424 struct list_head *iter;
2425 int slaves_in_agg;
2426 int slave_agg_no;
2427 int agg_id;
2428
2429 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
2430 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
2431 dev->name);
2432 goto err_free;
2433 }
2434
2435 slaves_in_agg = ad_info.ports;
2436 agg_id = ad_info.aggregator_id;
2437
2438 if (slaves_in_agg == 0) {
2439 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
2440 goto err_free;
2441 }
2442
2443 slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg);
2444 first_ok_slave = NULL;
2445
2446 bond_for_each_slave_rcu(bond, slave, iter) {
2447 agg = SLAVE_AD_INFO(slave).port.aggregator;
2448 if (!agg || agg->aggregator_identifier != agg_id)
2449 continue;
2450
2451 if (slave_agg_no >= 0) {
2452 if (!first_ok_slave && SLAVE_IS_OK(slave))
2453 first_ok_slave = slave;
2454 slave_agg_no--;
2455 continue;
2456 }
2457
2458 if (SLAVE_IS_OK(slave)) {
2459 bond_dev_queue_xmit(bond, skb, slave->dev);
2460 goto out;
2461 }
2462 }
2463
2464 if (slave_agg_no >= 0) {
2465 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2466 dev->name, agg_id);
2467 goto err_free;
2468 }
2469
2470 /* we couldn't find any suitable slave after the agg_no, so use the
2471 * first suitable found, if found.
2472 */
2473 if (first_ok_slave)
2474 bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
2475 else
2476 goto err_free;
2477
2478out:
2479 return NETDEV_TX_OK;
2480err_free:
2481 /* no suitable interface, frame not sent */
2482 dev_kfree_skb_any(skb);
2483 goto out;
2484}
2485
2486int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2487 struct slave *slave)
2488{
2489 int ret = RX_HANDLER_ANOTHER;
2490 struct lacpdu *lacpdu, _lacpdu;
2491
2492 if (skb->protocol != PKT_TYPE_LACPDU)
2493 return ret;
2494
2495 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2496 if (!lacpdu)
2497 return ret;
2498
2499 read_lock(&bond->lock);
2500 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len);
2501 read_unlock(&bond->lock);
2502 return ret;
2503}
2504
2505/**
2506 * bond_3ad_update_lacp_rate - change the lacp rate
2507 * @bond - bonding struct
2508 *
2509 * When modify lacp_rate parameter via sysfs,
2510 * update actor_oper_port_state of each port.
2511 *
2512 * Hold slave->state_machine_lock,
2513 * so we can modify port->actor_oper_port_state,
2514 * no matter bond is up or down.
2515 */
2516void bond_3ad_update_lacp_rate(struct bonding *bond)
2517{
2518 struct port *port = NULL;
2519 struct list_head *iter;
2520 struct slave *slave;
2521 int lacp_fast;
2522
2523 lacp_fast = bond->params.lacp_fast;
2524 bond_for_each_slave(bond, slave, iter) {
2525 port = &(SLAVE_AD_INFO(slave).port);
2526 __get_state_machine_lock(port);
2527 if (lacp_fast)
2528 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2529 else
2530 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2531 __release_state_machine_lock(port);
2532 }
2533}
1/*
2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3 *
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)
7 * any later version.
8 *
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
12 * more details.
13 *
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.
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 */
22
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>
34
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
41
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
49
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
59
60/* Port Variables definitions used by the State Machines (43.4.7 in the
61 * 802.3ad standard)
62 */
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)
74
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 * --------------------------------------------------------------
81 * |15 6|5 1|0
82 */
83#define AD_DUPLEX_KEY_MASKS 0x1
84#define AD_SPEED_KEY_MASKS 0x3E
85#define AD_USER_KEY_MASKS 0xFFC0
86
87enum ad_link_speed_type {
88 AD_LINK_SPEED_1MBPS = 1,
89 AD_LINK_SPEED_10MBPS,
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,
98};
99
100/* compare MAC addresses */
101#define MAC_ADDRESS_EQUAL(A, B) \
102 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
103
104static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
105static u16 ad_ticks_per_sec;
106static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
107
108static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
109
110/* ================= main 802.3ad protocol functions ================== */
111static int ad_lacpdu_send(struct port *port);
112static int ad_marker_send(struct port *port, struct bond_marker *marker);
113static void ad_mux_machine(struct port *port, bool *update_slave_arr);
114static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
115static void ad_tx_machine(struct port *port);
116static void ad_periodic_machine(struct port *port);
117static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
118static void ad_agg_selection_logic(struct aggregator *aggregator,
119 bool *update_slave_arr);
120static void ad_clear_agg(struct aggregator *aggregator);
121static void ad_initialize_agg(struct aggregator *aggregator);
122static void ad_initialize_port(struct port *port, int lacp_fast);
123static void ad_enable_collecting_distributing(struct port *port,
124 bool *update_slave_arr);
125static void ad_disable_collecting_distributing(struct port *port,
126 bool *update_slave_arr);
127static void ad_marker_info_received(struct bond_marker *marker_info,
128 struct port *port);
129static void ad_marker_response_received(struct bond_marker *marker,
130 struct port *port);
131static void ad_update_actor_keys(struct port *port, bool reset);
132
133
134/* ================= api to bonding and kernel code ================== */
135
136/**
137 * __get_bond_by_port - get the port's bonding struct
138 * @port: the port we're looking at
139 *
140 * Return @port's bonding struct, or %NULL if it can't be found.
141 */
142static inline struct bonding *__get_bond_by_port(struct port *port)
143{
144 if (port->slave == NULL)
145 return NULL;
146
147 return bond_get_bond_by_slave(port->slave);
148}
149
150/**
151 * __get_first_agg - get the first aggregator in the bond
152 * @bond: the bond we're looking at
153 *
154 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
155 * found.
156 * The caller must hold RCU or RTNL lock.
157 */
158static inline struct aggregator *__get_first_agg(struct port *port)
159{
160 struct bonding *bond = __get_bond_by_port(port);
161 struct slave *first_slave;
162 struct aggregator *agg;
163
164 /* If there's no bond for this port, or bond has no slaves */
165 if (bond == NULL)
166 return NULL;
167
168 rcu_read_lock();
169 first_slave = bond_first_slave_rcu(bond);
170 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
171 rcu_read_unlock();
172
173 return agg;
174}
175
176/**
177 * __agg_has_partner - see if we have a partner
178 * @agg: the agregator we're looking at
179 *
180 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
181 * address for the partner). Return 0 if not.
182 */
183static inline int __agg_has_partner(struct aggregator *agg)
184{
185 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
186}
187
188/**
189 * __disable_port - disable the port's slave
190 * @port: the port we're looking at
191 */
192static inline void __disable_port(struct port *port)
193{
194 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
195}
196
197/**
198 * __enable_port - enable the port's slave, if it's up
199 * @port: the port we're looking at
200 */
201static inline void __enable_port(struct port *port)
202{
203 struct slave *slave = port->slave;
204
205 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
206 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
207}
208
209/**
210 * __port_is_enabled - check if the port's slave is in active state
211 * @port: the port we're looking at
212 */
213static inline int __port_is_enabled(struct port *port)
214{
215 return bond_is_active_slave(port->slave);
216}
217
218/**
219 * __get_agg_selection_mode - get the aggregator selection mode
220 * @port: the port we're looking at
221 *
222 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
223 */
224static inline u32 __get_agg_selection_mode(struct port *port)
225{
226 struct bonding *bond = __get_bond_by_port(port);
227
228 if (bond == NULL)
229 return BOND_AD_STABLE;
230
231 return bond->params.ad_select;
232}
233
234/**
235 * __check_agg_selection_timer - check if the selection timer has expired
236 * @port: the port we're looking at
237 */
238static inline int __check_agg_selection_timer(struct port *port)
239{
240 struct bonding *bond = __get_bond_by_port(port);
241
242 if (bond == NULL)
243 return 0;
244
245 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
246}
247
248/**
249 * __get_link_speed - get a port's speed
250 * @port: the port we're looking at
251 *
252 * Return @port's speed in 802.3ad enum format. i.e. one of:
253 * 0,
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
263 */
264static u16 __get_link_speed(struct port *port)
265{
266 struct slave *slave = port->slave;
267 u16 speed;
268
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.
273 */
274 if (slave->link != BOND_LINK_UP)
275 speed = 0;
276 else {
277 switch (slave->speed) {
278 case SPEED_10:
279 speed = AD_LINK_SPEED_10MBPS;
280 break;
281
282 case SPEED_100:
283 speed = AD_LINK_SPEED_100MBPS;
284 break;
285
286 case SPEED_1000:
287 speed = AD_LINK_SPEED_1000MBPS;
288 break;
289
290 case SPEED_2500:
291 speed = AD_LINK_SPEED_2500MBPS;
292 break;
293
294 case SPEED_10000:
295 speed = AD_LINK_SPEED_10000MBPS;
296 break;
297
298 case SPEED_20000:
299 speed = AD_LINK_SPEED_20000MBPS;
300 break;
301
302 case SPEED_40000:
303 speed = AD_LINK_SPEED_40000MBPS;
304 break;
305
306 case SPEED_56000:
307 speed = AD_LINK_SPEED_56000MBPS;
308 break;
309
310 case SPEED_100000:
311 speed = AD_LINK_SPEED_100000MBPS;
312 break;
313
314 default:
315 /* unknown speed value from ethtool. shouldn't happen */
316 speed = 0;
317 break;
318 }
319 }
320
321 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
322 port->actor_port_number, speed);
323 return speed;
324}
325
326/**
327 * __get_duplex - get a port's duplex
328 * @port: the port we're looking at
329 *
330 * Return @port's duplex in 802.3ad bitmask format. i.e.:
331 * 0x01 if in full duplex
332 * 0x00 otherwise
333 */
334static u8 __get_duplex(struct port *port)
335{
336 struct slave *slave = port->slave;
337 u8 retval = 0x0;
338
339 /* handling a special case: when the configuration starts with
340 * link down, it sets the duplex to 0.
341 */
342 if (slave->link == BOND_LINK_UP) {
343 switch (slave->duplex) {
344 case DUPLEX_FULL:
345 retval = 0x1;
346 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
347 port->actor_port_number);
348 break;
349 case DUPLEX_HALF:
350 default:
351 retval = 0x0;
352 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
353 port->actor_port_number);
354 break;
355 }
356 }
357 return retval;
358}
359
360static void __ad_actor_update_port(struct port *port)
361{
362 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
363
364 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
365 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
366}
367
368/* Conversions */
369
370/**
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
374 *
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.
378 */
379static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
380{
381 u16 retval = 0; /* to silence the compiler */
382
383 switch (timer_type) {
384 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
385 if (par)
386 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
387 else
388 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
389 break;
390 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
391 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
392 break;
393 case AD_PERIODIC_TIMER: /* for periodic machine */
394 retval = (par*ad_ticks_per_sec); /* long timeout */
395 break;
396 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
397 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
398 break;
399 case AD_WAIT_WHILE_TIMER: /* for selection machine */
400 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
401 break;
402 }
403
404 return retval;
405}
406
407
408/* ================= ad_rx_machine helper functions ================== */
409
410/**
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
414 *
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.
428 *
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.
432 */
433static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
434{
435 /* check if all parameters are alike
436 * or this is individual link(aggregation == FALSE)
437 * then update the state machine Matched variable.
438 */
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)
446 ) {
447 port->sm_vars |= AD_PORT_MATCHED;
448 } else {
449 port->sm_vars &= ~AD_PORT_MATCHED;
450 }
451}
452
453/**
454 * __record_pdu - record parameters from a received lacpdu
455 * @lacpdu: the lacpdu we've received
456 * @port: the port we're looking at
457 *
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.
461 */
462static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
463{
464 if (lacpdu && port) {
465 struct port_params *partner = &port->partner_oper;
466
467 __choose_matched(lacpdu, port);
468 /* record the new parameter values for the partner
469 * operational
470 */
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;
477
478 /* set actor_oper_port_state.defaulted to FALSE */
479 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
480
481 /* set the partner sync. to on if the partner is sync,
482 * and the port is matched
483 */
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);
488 } else {
489 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
490 pr_debug("%s partner sync=0\n", port->slave->dev->name);
491 }
492 }
493}
494
495/**
496 * __record_default - record default parameters
497 * @port: the port we're looking at
498 *
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.
502 */
503static void __record_default(struct port *port)
504{
505 if (port) {
506 /* record the partner admin parameters */
507 memcpy(&port->partner_oper, &port->partner_admin,
508 sizeof(struct port_params));
509
510 /* set actor_oper_port_state.defaulted to true */
511 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
512 }
513}
514
515/**
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
519 *
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.
527 */
528static void __update_selected(struct lacpdu *lacpdu, struct port *port)
529{
530 if (lacpdu && port) {
531 const struct port_params *partner = &port->partner_oper;
532
533 /* check if any parameter is different then
534 * update the state machine selected variable.
535 */
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;
543 }
544 }
545}
546
547/**
548 * __update_default_selected - update a port's Selected variable from Partner
549 * @port: the port we're looking at
550 *
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.
558 */
559static void __update_default_selected(struct port *port)
560{
561 if (port) {
562 const struct port_params *admin = &port->partner_admin;
563 const struct port_params *oper = &port->partner_oper;
564
565 /* check if any parameter is different then
566 * update the state machine selected variable.
567 */
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;
576 }
577 }
578}
579
580/**
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
584 *
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.
591 */
592static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
593{
594 /* validate lacpdu and port */
595 if (lacpdu && port) {
596 /* check if any parameter is different then
597 * update the port->ntt.
598 */
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))
608 ) {
609 port->ntt = true;
610 }
611 }
612}
613
614/**
615 * __agg_ports_are_ready - check if all ports in an aggregator are ready
616 * @aggregator: the aggregator we're looking at
617 *
618 */
619static int __agg_ports_are_ready(struct aggregator *aggregator)
620{
621 struct port *port;
622 int retval = 1;
623
624 if (aggregator) {
625 /* scan all ports in this aggregator to verfy if they are
626 * all ready.
627 */
628 for (port = aggregator->lag_ports;
629 port;
630 port = port->next_port_in_aggregator) {
631 if (!(port->sm_vars & AD_PORT_READY_N)) {
632 retval = 0;
633 break;
634 }
635 }
636 }
637
638 return retval;
639}
640
641/**
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
645 *
646 */
647static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
648{
649 struct port *port;
650
651 for (port = aggregator->lag_ports; port;
652 port = port->next_port_in_aggregator) {
653 if (val)
654 port->sm_vars |= AD_PORT_READY;
655 else
656 port->sm_vars &= ~AD_PORT_READY;
657 }
658}
659
660/**
661 * __get_agg_bandwidth - get the total bandwidth of an aggregator
662 * @aggregator: the aggregator we're looking at
663 *
664 */
665static u32 __get_agg_bandwidth(struct aggregator *aggregator)
666{
667 u32 bandwidth = 0;
668
669 if (aggregator->num_of_ports) {
670 switch (__get_link_speed(aggregator->lag_ports)) {
671 case AD_LINK_SPEED_1MBPS:
672 bandwidth = aggregator->num_of_ports;
673 break;
674 case AD_LINK_SPEED_10MBPS:
675 bandwidth = aggregator->num_of_ports * 10;
676 break;
677 case AD_LINK_SPEED_100MBPS:
678 bandwidth = aggregator->num_of_ports * 100;
679 break;
680 case AD_LINK_SPEED_1000MBPS:
681 bandwidth = aggregator->num_of_ports * 1000;
682 break;
683 case AD_LINK_SPEED_2500MBPS:
684 bandwidth = aggregator->num_of_ports * 2500;
685 break;
686 case AD_LINK_SPEED_10000MBPS:
687 bandwidth = aggregator->num_of_ports * 10000;
688 break;
689 case AD_LINK_SPEED_20000MBPS:
690 bandwidth = aggregator->num_of_ports * 20000;
691 break;
692 case AD_LINK_SPEED_40000MBPS:
693 bandwidth = aggregator->num_of_ports * 40000;
694 break;
695 case AD_LINK_SPEED_56000MBPS:
696 bandwidth = aggregator->num_of_ports * 56000;
697 break;
698 case AD_LINK_SPEED_100000MBPS:
699 bandwidth = aggregator->num_of_ports * 100000;
700 break;
701 default:
702 bandwidth = 0; /* to silence the compiler */
703 }
704 }
705 return bandwidth;
706}
707
708/**
709 * __get_active_agg - get the current active aggregator
710 * @aggregator: the aggregator we're looking at
711 *
712 * Caller must hold RCU lock.
713 */
714static struct aggregator *__get_active_agg(struct aggregator *aggregator)
715{
716 struct bonding *bond = aggregator->slave->bond;
717 struct list_head *iter;
718 struct slave *slave;
719
720 bond_for_each_slave_rcu(bond, slave, iter)
721 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
722 return &(SLAVE_AD_INFO(slave)->aggregator);
723
724 return NULL;
725}
726
727/**
728 * __update_lacpdu_from_port - update a port's lacpdu fields
729 * @port: the port we're looking at
730 */
731static inline void __update_lacpdu_from_port(struct port *port)
732{
733 struct lacpdu *lacpdu = &port->lacpdu;
734 const struct port_params *partner = &port->partner_oper;
735
736 /* update current actual Actor parameters
737 * lacpdu->subtype initialized
738 * lacpdu->version_number initialized
739 * lacpdu->tlv_type_actor_info initialized
740 * lacpdu->actor_information_length initialized
741 */
742
743 lacpdu->actor_system_priority = htons(port->actor_system_priority);
744 lacpdu->actor_system = port->actor_system;
745 lacpdu->actor_key = htons(port->actor_oper_port_key);
746 lacpdu->actor_port_priority = htons(port->actor_port_priority);
747 lacpdu->actor_port = htons(port->actor_port_number);
748 lacpdu->actor_state = port->actor_oper_port_state;
749 pr_debug("update lacpdu: %s, actor port state %x\n",
750 port->slave->dev->name, port->actor_oper_port_state);
751
752 /* lacpdu->reserved_3_1 initialized
753 * lacpdu->tlv_type_partner_info initialized
754 * lacpdu->partner_information_length initialized
755 */
756
757 lacpdu->partner_system_priority = htons(partner->system_priority);
758 lacpdu->partner_system = partner->system;
759 lacpdu->partner_key = htons(partner->key);
760 lacpdu->partner_port_priority = htons(partner->port_priority);
761 lacpdu->partner_port = htons(partner->port_number);
762 lacpdu->partner_state = partner->port_state;
763
764 /* lacpdu->reserved_3_2 initialized
765 * lacpdu->tlv_type_collector_info initialized
766 * lacpdu->collector_information_length initialized
767 * collector_max_delay initialized
768 * reserved_12[12] initialized
769 * tlv_type_terminator initialized
770 * terminator_length initialized
771 * reserved_50[50] initialized
772 */
773}
774
775/* ================= main 802.3ad protocol code ========================= */
776
777/**
778 * ad_lacpdu_send - send out a lacpdu packet on a given port
779 * @port: the port we're looking at
780 *
781 * Returns: 0 on success
782 * < 0 on error
783 */
784static int ad_lacpdu_send(struct port *port)
785{
786 struct slave *slave = port->slave;
787 struct sk_buff *skb;
788 struct lacpdu_header *lacpdu_header;
789 int length = sizeof(struct lacpdu_header);
790
791 skb = dev_alloc_skb(length);
792 if (!skb)
793 return -ENOMEM;
794
795 skb->dev = slave->dev;
796 skb_reset_mac_header(skb);
797 skb->network_header = skb->mac_header + ETH_HLEN;
798 skb->protocol = PKT_TYPE_LACPDU;
799 skb->priority = TC_PRIO_CONTROL;
800
801 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
802
803 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
804 /* Note: source address is set to be the member's PERMANENT address,
805 * because we use it to identify loopback lacpdus in receive.
806 */
807 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
808 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
809
810 lacpdu_header->lacpdu = port->lacpdu;
811
812 dev_queue_xmit(skb);
813
814 return 0;
815}
816
817/**
818 * ad_marker_send - send marker information/response on a given port
819 * @port: the port we're looking at
820 * @marker: marker data to send
821 *
822 * Returns: 0 on success
823 * < 0 on error
824 */
825static int ad_marker_send(struct port *port, struct bond_marker *marker)
826{
827 struct slave *slave = port->slave;
828 struct sk_buff *skb;
829 struct bond_marker_header *marker_header;
830 int length = sizeof(struct bond_marker_header);
831
832 skb = dev_alloc_skb(length + 16);
833 if (!skb)
834 return -ENOMEM;
835
836 skb_reserve(skb, 16);
837
838 skb->dev = slave->dev;
839 skb_reset_mac_header(skb);
840 skb->network_header = skb->mac_header + ETH_HLEN;
841 skb->protocol = PKT_TYPE_LACPDU;
842
843 marker_header = (struct bond_marker_header *)skb_put(skb, length);
844
845 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
846 /* Note: source address is set to be the member's PERMANENT address,
847 * because we use it to identify loopback MARKERs in receive.
848 */
849 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
850 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
851
852 marker_header->marker = *marker;
853
854 dev_queue_xmit(skb);
855
856 return 0;
857}
858
859/**
860 * ad_mux_machine - handle a port's mux state machine
861 * @port: the port we're looking at
862 * @update_slave_arr: Does slave array need update?
863 */
864static void ad_mux_machine(struct port *port, bool *update_slave_arr)
865{
866 mux_states_t last_state;
867
868 /* keep current State Machine state to compare later if it was
869 * changed
870 */
871 last_state = port->sm_mux_state;
872
873 if (port->sm_vars & AD_PORT_BEGIN) {
874 port->sm_mux_state = AD_MUX_DETACHED;
875 } else {
876 switch (port->sm_mux_state) {
877 case AD_MUX_DETACHED:
878 if ((port->sm_vars & AD_PORT_SELECTED)
879 || (port->sm_vars & AD_PORT_STANDBY))
880 /* if SELECTED or STANDBY */
881 port->sm_mux_state = AD_MUX_WAITING;
882 break;
883 case AD_MUX_WAITING:
884 /* if SELECTED == FALSE return to DETACH state */
885 if (!(port->sm_vars & AD_PORT_SELECTED)) {
886 port->sm_vars &= ~AD_PORT_READY_N;
887 /* in order to withhold the Selection Logic to
888 * check all ports READY_N value every callback
889 * cycle to update ready variable, we check
890 * READY_N and update READY here
891 */
892 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
893 port->sm_mux_state = AD_MUX_DETACHED;
894 break;
895 }
896
897 /* check if the wait_while_timer expired */
898 if (port->sm_mux_timer_counter
899 && !(--port->sm_mux_timer_counter))
900 port->sm_vars |= AD_PORT_READY_N;
901
902 /* in order to withhold the selection logic to check
903 * all ports READY_N value every callback cycle to
904 * update ready variable, we check READY_N and update
905 * READY here
906 */
907 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
908
909 /* if the wait_while_timer expired, and the port is
910 * in READY state, move to ATTACHED state
911 */
912 if ((port->sm_vars & AD_PORT_READY)
913 && !port->sm_mux_timer_counter)
914 port->sm_mux_state = AD_MUX_ATTACHED;
915 break;
916 case AD_MUX_ATTACHED:
917 /* check also if agg_select_timer expired (so the
918 * edable port will take place only after this timer)
919 */
920 if ((port->sm_vars & AD_PORT_SELECTED) &&
921 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
922 !__check_agg_selection_timer(port)) {
923 if (port->aggregator->is_active)
924 port->sm_mux_state =
925 AD_MUX_COLLECTING_DISTRIBUTING;
926 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
927 (port->sm_vars & AD_PORT_STANDBY)) {
928 /* if UNSELECTED or STANDBY */
929 port->sm_vars &= ~AD_PORT_READY_N;
930 /* in order to withhold the selection logic to
931 * check all ports READY_N value every callback
932 * cycle to update ready variable, we check
933 * READY_N and update READY here
934 */
935 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
936 port->sm_mux_state = AD_MUX_DETACHED;
937 } else if (port->aggregator->is_active) {
938 port->actor_oper_port_state |=
939 AD_STATE_SYNCHRONIZATION;
940 }
941 break;
942 case AD_MUX_COLLECTING_DISTRIBUTING:
943 if (!(port->sm_vars & AD_PORT_SELECTED) ||
944 (port->sm_vars & AD_PORT_STANDBY) ||
945 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
946 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
947 port->sm_mux_state = AD_MUX_ATTACHED;
948 } else {
949 /* if port state hasn't changed make
950 * sure that a collecting distributing
951 * port in an active aggregator is enabled
952 */
953 if (port->aggregator &&
954 port->aggregator->is_active &&
955 !__port_is_enabled(port)) {
956
957 __enable_port(port);
958 }
959 }
960 break;
961 default:
962 break;
963 }
964 }
965
966 /* check if the state machine was changed */
967 if (port->sm_mux_state != last_state) {
968 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
969 port->actor_port_number,
970 port->slave->dev->name,
971 last_state,
972 port->sm_mux_state);
973 switch (port->sm_mux_state) {
974 case AD_MUX_DETACHED:
975 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
976 ad_disable_collecting_distributing(port,
977 update_slave_arr);
978 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
979 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
980 port->ntt = true;
981 break;
982 case AD_MUX_WAITING:
983 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
984 break;
985 case AD_MUX_ATTACHED:
986 if (port->aggregator->is_active)
987 port->actor_oper_port_state |=
988 AD_STATE_SYNCHRONIZATION;
989 else
990 port->actor_oper_port_state &=
991 ~AD_STATE_SYNCHRONIZATION;
992 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
993 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
994 ad_disable_collecting_distributing(port,
995 update_slave_arr);
996 port->ntt = true;
997 break;
998 case AD_MUX_COLLECTING_DISTRIBUTING:
999 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1000 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1001 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1002 ad_enable_collecting_distributing(port,
1003 update_slave_arr);
1004 port->ntt = true;
1005 break;
1006 default:
1007 break;
1008 }
1009 }
1010}
1011
1012/**
1013 * ad_rx_machine - handle a port's rx State Machine
1014 * @lacpdu: the lacpdu we've received
1015 * @port: the port we're looking at
1016 *
1017 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1018 * CURRENT. If timer expired set the state machine in the proper state.
1019 * In other cases, this function checks if we need to switch to other state.
1020 */
1021static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1022{
1023 rx_states_t last_state;
1024
1025 /* keep current State Machine state to compare later if it was
1026 * changed
1027 */
1028 last_state = port->sm_rx_state;
1029
1030 /* check if state machine should change state */
1031
1032 /* first, check if port was reinitialized */
1033 if (port->sm_vars & AD_PORT_BEGIN) {
1034 port->sm_rx_state = AD_RX_INITIALIZE;
1035 port->sm_vars |= AD_PORT_CHURNED;
1036 /* check if port is not enabled */
1037 } else if (!(port->sm_vars & AD_PORT_BEGIN)
1038 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1039 port->sm_rx_state = AD_RX_PORT_DISABLED;
1040 /* check if new lacpdu arrived */
1041 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1042 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1043 (port->sm_rx_state == AD_RX_CURRENT))) {
1044 if (port->sm_rx_state != AD_RX_CURRENT)
1045 port->sm_vars |= AD_PORT_CHURNED;
1046 port->sm_rx_timer_counter = 0;
1047 port->sm_rx_state = AD_RX_CURRENT;
1048 } else {
1049 /* if timer is on, and if it is expired */
1050 if (port->sm_rx_timer_counter &&
1051 !(--port->sm_rx_timer_counter)) {
1052 switch (port->sm_rx_state) {
1053 case AD_RX_EXPIRED:
1054 port->sm_rx_state = AD_RX_DEFAULTED;
1055 break;
1056 case AD_RX_CURRENT:
1057 port->sm_rx_state = AD_RX_EXPIRED;
1058 break;
1059 default:
1060 break;
1061 }
1062 } else {
1063 /* if no lacpdu arrived and no timer is on */
1064 switch (port->sm_rx_state) {
1065 case AD_RX_PORT_DISABLED:
1066 if (port->sm_vars & AD_PORT_MOVED)
1067 port->sm_rx_state = AD_RX_INITIALIZE;
1068 else if (port->is_enabled
1069 && (port->sm_vars
1070 & AD_PORT_LACP_ENABLED))
1071 port->sm_rx_state = AD_RX_EXPIRED;
1072 else if (port->is_enabled
1073 && ((port->sm_vars
1074 & AD_PORT_LACP_ENABLED) == 0))
1075 port->sm_rx_state = AD_RX_LACP_DISABLED;
1076 break;
1077 default:
1078 break;
1079
1080 }
1081 }
1082 }
1083
1084 /* check if the State machine was changed or new lacpdu arrived */
1085 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1086 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1087 port->actor_port_number,
1088 port->slave->dev->name,
1089 last_state,
1090 port->sm_rx_state);
1091 switch (port->sm_rx_state) {
1092 case AD_RX_INITIALIZE:
1093 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1094 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1095 else
1096 port->sm_vars |= AD_PORT_LACP_ENABLED;
1097 port->sm_vars &= ~AD_PORT_SELECTED;
1098 __record_default(port);
1099 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1100 port->sm_vars &= ~AD_PORT_MOVED;
1101 port->sm_rx_state = AD_RX_PORT_DISABLED;
1102
1103 /* Fall Through */
1104 case AD_RX_PORT_DISABLED:
1105 port->sm_vars &= ~AD_PORT_MATCHED;
1106 break;
1107 case AD_RX_LACP_DISABLED:
1108 port->sm_vars &= ~AD_PORT_SELECTED;
1109 __record_default(port);
1110 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1111 port->sm_vars |= AD_PORT_MATCHED;
1112 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1113 break;
1114 case AD_RX_EXPIRED:
1115 /* Reset of the Synchronization flag (Standard 43.4.12)
1116 * This reset cause to disable this port in the
1117 * COLLECTING_DISTRIBUTING state of the mux machine in
1118 * case of EXPIRED even if LINK_DOWN didn't arrive for
1119 * the port.
1120 */
1121 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1122 port->sm_vars &= ~AD_PORT_MATCHED;
1123 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
1124 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1125 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1126 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1127 port->sm_vars |= AD_PORT_CHURNED;
1128 break;
1129 case AD_RX_DEFAULTED:
1130 __update_default_selected(port);
1131 __record_default(port);
1132 port->sm_vars |= AD_PORT_MATCHED;
1133 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1134 break;
1135 case AD_RX_CURRENT:
1136 /* detect loopback situation */
1137 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1138 &(port->actor_system))) {
1139 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
1140 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1141 port->slave->dev->name);
1142 return;
1143 }
1144 __update_selected(lacpdu, port);
1145 __update_ntt(lacpdu, port);
1146 __record_pdu(lacpdu, port);
1147 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1148 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1149 break;
1150 default:
1151 break;
1152 }
1153 }
1154}
1155
1156/**
1157 * ad_churn_machine - handle port churn's state machine
1158 * @port: the port we're looking at
1159 *
1160 */
1161static void ad_churn_machine(struct port *port)
1162{
1163 if (port->sm_vars & AD_PORT_CHURNED) {
1164 port->sm_vars &= ~AD_PORT_CHURNED;
1165 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1166 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1167 port->sm_churn_actor_timer_counter =
1168 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1169 port->sm_churn_partner_timer_counter =
1170 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1171 return;
1172 }
1173 if (port->sm_churn_actor_timer_counter &&
1174 !(--port->sm_churn_actor_timer_counter) &&
1175 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1176 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1177 port->sm_churn_actor_state = AD_NO_CHURN;
1178 } else {
1179 port->churn_actor_count++;
1180 port->sm_churn_actor_state = AD_CHURN;
1181 }
1182 }
1183 if (port->sm_churn_partner_timer_counter &&
1184 !(--port->sm_churn_partner_timer_counter) &&
1185 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1186 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1187 port->sm_churn_partner_state = AD_NO_CHURN;
1188 } else {
1189 port->churn_partner_count++;
1190 port->sm_churn_partner_state = AD_CHURN;
1191 }
1192 }
1193}
1194
1195/**
1196 * ad_tx_machine - handle a port's tx state machine
1197 * @port: the port we're looking at
1198 */
1199static void ad_tx_machine(struct port *port)
1200{
1201 /* check if tx timer expired, to verify that we do not send more than
1202 * 3 packets per second
1203 */
1204 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1205 /* check if there is something to send */
1206 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1207 __update_lacpdu_from_port(port);
1208
1209 if (ad_lacpdu_send(port) >= 0) {
1210 pr_debug("Sent LACPDU on port %d\n",
1211 port->actor_port_number);
1212
1213 /* mark ntt as false, so it will not be sent
1214 * again until demanded
1215 */
1216 port->ntt = false;
1217 }
1218 }
1219 /* restart tx timer(to verify that we will not exceed
1220 * AD_MAX_TX_IN_SECOND
1221 */
1222 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1223 }
1224}
1225
1226/**
1227 * ad_periodic_machine - handle a port's periodic state machine
1228 * @port: the port we're looking at
1229 *
1230 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1231 */
1232static void ad_periodic_machine(struct port *port)
1233{
1234 periodic_states_t last_state;
1235
1236 /* keep current state machine state to compare later if it was changed */
1237 last_state = port->sm_periodic_state;
1238
1239 /* check if port was reinitialized */
1240 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1241 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1242 ) {
1243 port->sm_periodic_state = AD_NO_PERIODIC;
1244 }
1245 /* check if state machine should change state */
1246 else if (port->sm_periodic_timer_counter) {
1247 /* check if periodic state machine expired */
1248 if (!(--port->sm_periodic_timer_counter)) {
1249 /* if expired then do tx */
1250 port->sm_periodic_state = AD_PERIODIC_TX;
1251 } else {
1252 /* If not expired, check if there is some new timeout
1253 * parameter from the partner state
1254 */
1255 switch (port->sm_periodic_state) {
1256 case AD_FAST_PERIODIC:
1257 if (!(port->partner_oper.port_state
1258 & AD_STATE_LACP_TIMEOUT))
1259 port->sm_periodic_state = AD_SLOW_PERIODIC;
1260 break;
1261 case AD_SLOW_PERIODIC:
1262 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1263 port->sm_periodic_timer_counter = 0;
1264 port->sm_periodic_state = AD_PERIODIC_TX;
1265 }
1266 break;
1267 default:
1268 break;
1269 }
1270 }
1271 } else {
1272 switch (port->sm_periodic_state) {
1273 case AD_NO_PERIODIC:
1274 port->sm_periodic_state = AD_FAST_PERIODIC;
1275 break;
1276 case AD_PERIODIC_TX:
1277 if (!(port->partner_oper.port_state &
1278 AD_STATE_LACP_TIMEOUT))
1279 port->sm_periodic_state = AD_SLOW_PERIODIC;
1280 else
1281 port->sm_periodic_state = AD_FAST_PERIODIC;
1282 break;
1283 default:
1284 break;
1285 }
1286 }
1287
1288 /* check if the state machine was changed */
1289 if (port->sm_periodic_state != last_state) {
1290 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1291 port->actor_port_number, last_state,
1292 port->sm_periodic_state);
1293 switch (port->sm_periodic_state) {
1294 case AD_NO_PERIODIC:
1295 port->sm_periodic_timer_counter = 0;
1296 break;
1297 case AD_FAST_PERIODIC:
1298 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1299 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1300 break;
1301 case AD_SLOW_PERIODIC:
1302 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1303 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1304 break;
1305 case AD_PERIODIC_TX:
1306 port->ntt = true;
1307 break;
1308 default:
1309 break;
1310 }
1311 }
1312}
1313
1314/**
1315 * ad_port_selection_logic - select aggregation groups
1316 * @port: the port we're looking at
1317 * @update_slave_arr: Does slave array need update?
1318 *
1319 * Select aggregation groups, and assign each port for it's aggregetor. The
1320 * selection logic is called in the inititalization (after all the handshkes),
1321 * and after every lacpdu receive (if selected is off).
1322 */
1323static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1324{
1325 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1326 struct port *last_port = NULL, *curr_port;
1327 struct list_head *iter;
1328 struct bonding *bond;
1329 struct slave *slave;
1330 int found = 0;
1331
1332 /* if the port is already Selected, do nothing */
1333 if (port->sm_vars & AD_PORT_SELECTED)
1334 return;
1335
1336 bond = __get_bond_by_port(port);
1337
1338 /* if the port is connected to other aggregator, detach it */
1339 if (port->aggregator) {
1340 /* detach the port from its former aggregator */
1341 temp_aggregator = port->aggregator;
1342 for (curr_port = temp_aggregator->lag_ports; curr_port;
1343 last_port = curr_port,
1344 curr_port = curr_port->next_port_in_aggregator) {
1345 if (curr_port == port) {
1346 temp_aggregator->num_of_ports--;
1347 /* if it is the first port attached to the
1348 * aggregator
1349 */
1350 if (!last_port) {
1351 temp_aggregator->lag_ports =
1352 port->next_port_in_aggregator;
1353 } else {
1354 /* not the first port attached to the
1355 * aggregator
1356 */
1357 last_port->next_port_in_aggregator =
1358 port->next_port_in_aggregator;
1359 }
1360
1361 /* clear the port's relations to this
1362 * aggregator
1363 */
1364 port->aggregator = NULL;
1365 port->next_port_in_aggregator = NULL;
1366 port->actor_port_aggregator_identifier = 0;
1367
1368 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1369 port->actor_port_number,
1370 temp_aggregator->aggregator_identifier);
1371 /* if the aggregator is empty, clear its
1372 * parameters, and set it ready to be attached
1373 */
1374 if (!temp_aggregator->lag_ports)
1375 ad_clear_agg(temp_aggregator);
1376 break;
1377 }
1378 }
1379 if (!curr_port) {
1380 /* meaning: the port was related to an aggregator
1381 * but was not on the aggregator port list
1382 */
1383 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1384 port->slave->bond->dev->name,
1385 port->actor_port_number,
1386 port->slave->dev->name,
1387 port->aggregator->aggregator_identifier);
1388 }
1389 }
1390 /* search on all aggregators for a suitable aggregator for this port */
1391 bond_for_each_slave(bond, slave, iter) {
1392 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1393
1394 /* keep a free aggregator for later use(if needed) */
1395 if (!aggregator->lag_ports) {
1396 if (!free_aggregator)
1397 free_aggregator = aggregator;
1398 continue;
1399 }
1400 /* check if current aggregator suits us */
1401 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1402 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1403 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1404 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1405 ) &&
1406 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1407 !aggregator->is_individual) /* but is not individual OR */
1408 )
1409 ) {
1410 /* attach to the founded aggregator */
1411 port->aggregator = aggregator;
1412 port->actor_port_aggregator_identifier =
1413 port->aggregator->aggregator_identifier;
1414 port->next_port_in_aggregator = aggregator->lag_ports;
1415 port->aggregator->num_of_ports++;
1416 aggregator->lag_ports = port;
1417 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1418 port->actor_port_number,
1419 port->aggregator->aggregator_identifier);
1420
1421 /* mark this port as selected */
1422 port->sm_vars |= AD_PORT_SELECTED;
1423 found = 1;
1424 break;
1425 }
1426 }
1427
1428 /* the port couldn't find an aggregator - attach it to a new
1429 * aggregator
1430 */
1431 if (!found) {
1432 if (free_aggregator) {
1433 /* assign port a new aggregator */
1434 port->aggregator = free_aggregator;
1435 port->actor_port_aggregator_identifier =
1436 port->aggregator->aggregator_identifier;
1437
1438 /* update the new aggregator's parameters
1439 * if port was responsed from the end-user
1440 */
1441 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1442 /* if port is full duplex */
1443 port->aggregator->is_individual = false;
1444 else
1445 port->aggregator->is_individual = true;
1446
1447 port->aggregator->actor_admin_aggregator_key =
1448 port->actor_admin_port_key;
1449 port->aggregator->actor_oper_aggregator_key =
1450 port->actor_oper_port_key;
1451 port->aggregator->partner_system =
1452 port->partner_oper.system;
1453 port->aggregator->partner_system_priority =
1454 port->partner_oper.system_priority;
1455 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1456 port->aggregator->receive_state = 1;
1457 port->aggregator->transmit_state = 1;
1458 port->aggregator->lag_ports = port;
1459 port->aggregator->num_of_ports++;
1460
1461 /* mark this port as selected */
1462 port->sm_vars |= AD_PORT_SELECTED;
1463
1464 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1465 port->actor_port_number,
1466 port->aggregator->aggregator_identifier);
1467 } else {
1468 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1469 port->actor_port_number, port->slave->dev->name);
1470 }
1471 }
1472 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1473 * in all aggregator's ports, else set ready=FALSE in all
1474 * aggregator's ports
1475 */
1476 __set_agg_ports_ready(port->aggregator,
1477 __agg_ports_are_ready(port->aggregator));
1478
1479 aggregator = __get_first_agg(port);
1480 ad_agg_selection_logic(aggregator, update_slave_arr);
1481
1482 if (!port->aggregator->is_active)
1483 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1484}
1485
1486/* Decide if "agg" is a better choice for the new active aggregator that
1487 * the current best, according to the ad_select policy.
1488 */
1489static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1490 struct aggregator *curr)
1491{
1492 /* 0. If no best, select current.
1493 *
1494 * 1. If the current agg is not individual, and the best is
1495 * individual, select current.
1496 *
1497 * 2. If current agg is individual and the best is not, keep best.
1498 *
1499 * 3. Therefore, current and best are both individual or both not
1500 * individual, so:
1501 *
1502 * 3a. If current agg partner replied, and best agg partner did not,
1503 * select current.
1504 *
1505 * 3b. If current agg partner did not reply and best agg partner
1506 * did reply, keep best.
1507 *
1508 * 4. Therefore, current and best both have partner replies or
1509 * both do not, so perform selection policy:
1510 *
1511 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1512 * select by bandwidth.
1513 *
1514 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1515 */
1516 if (!best)
1517 return curr;
1518
1519 if (!curr->is_individual && best->is_individual)
1520 return curr;
1521
1522 if (curr->is_individual && !best->is_individual)
1523 return best;
1524
1525 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1526 return curr;
1527
1528 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1529 return best;
1530
1531 switch (__get_agg_selection_mode(curr->lag_ports)) {
1532 case BOND_AD_COUNT:
1533 if (curr->num_of_ports > best->num_of_ports)
1534 return curr;
1535
1536 if (curr->num_of_ports < best->num_of_ports)
1537 return best;
1538
1539 /*FALLTHROUGH*/
1540 case BOND_AD_STABLE:
1541 case BOND_AD_BANDWIDTH:
1542 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1543 return curr;
1544
1545 break;
1546
1547 default:
1548 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1549 curr->slave->bond->dev->name,
1550 __get_agg_selection_mode(curr->lag_ports));
1551 break;
1552 }
1553
1554 return best;
1555}
1556
1557static int agg_device_up(const struct aggregator *agg)
1558{
1559 struct port *port = agg->lag_ports;
1560
1561 if (!port)
1562 return 0;
1563
1564 return netif_running(port->slave->dev) &&
1565 netif_carrier_ok(port->slave->dev);
1566}
1567
1568/**
1569 * ad_agg_selection_logic - select an aggregation group for a team
1570 * @aggregator: the aggregator we're looking at
1571 * @update_slave_arr: Does slave array need update?
1572 *
1573 * It is assumed that only one aggregator may be selected for a team.
1574 *
1575 * The logic of this function is to select the aggregator according to
1576 * the ad_select policy:
1577 *
1578 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1579 * it, and to reselect the active aggregator only if the previous
1580 * aggregator has no more ports related to it.
1581 *
1582 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1583 * bandwidth, and reselect whenever a link state change takes place or the
1584 * set of slaves in the bond changes.
1585 *
1586 * BOND_AD_COUNT: select the aggregator with largest number of ports
1587 * (slaves), and reselect whenever a link state change takes place or the
1588 * set of slaves in the bond changes.
1589 *
1590 * FIXME: this function MUST be called with the first agg in the bond, or
1591 * __get_active_agg() won't work correctly. This function should be better
1592 * called with the bond itself, and retrieve the first agg from it.
1593 */
1594static void ad_agg_selection_logic(struct aggregator *agg,
1595 bool *update_slave_arr)
1596{
1597 struct aggregator *best, *active, *origin;
1598 struct bonding *bond = agg->slave->bond;
1599 struct list_head *iter;
1600 struct slave *slave;
1601 struct port *port;
1602
1603 rcu_read_lock();
1604 origin = agg;
1605 active = __get_active_agg(agg);
1606 best = (active && agg_device_up(active)) ? active : NULL;
1607
1608 bond_for_each_slave_rcu(bond, slave, iter) {
1609 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1610
1611 agg->is_active = 0;
1612
1613 if (agg->num_of_ports && agg_device_up(agg))
1614 best = ad_agg_selection_test(best, agg);
1615 }
1616
1617 if (best &&
1618 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1619 /* For the STABLE policy, don't replace the old active
1620 * aggregator if it's still active (it has an answering
1621 * partner) or if both the best and active don't have an
1622 * answering partner.
1623 */
1624 if (active && active->lag_ports &&
1625 active->lag_ports->is_enabled &&
1626 (__agg_has_partner(active) ||
1627 (!__agg_has_partner(active) &&
1628 !__agg_has_partner(best)))) {
1629 if (!(!active->actor_oper_aggregator_key &&
1630 best->actor_oper_aggregator_key)) {
1631 best = NULL;
1632 active->is_active = 1;
1633 }
1634 }
1635 }
1636
1637 if (best && (best == active)) {
1638 best = NULL;
1639 active->is_active = 1;
1640 }
1641
1642 /* if there is new best aggregator, activate it */
1643 if (best) {
1644 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1645 best->aggregator_identifier, best->num_of_ports,
1646 best->actor_oper_aggregator_key,
1647 best->partner_oper_aggregator_key,
1648 best->is_individual, best->is_active);
1649 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1650 best->lag_ports, best->slave,
1651 best->slave ? best->slave->dev->name : "NULL");
1652
1653 bond_for_each_slave_rcu(bond, slave, iter) {
1654 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1655
1656 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1657 agg->aggregator_identifier, agg->num_of_ports,
1658 agg->actor_oper_aggregator_key,
1659 agg->partner_oper_aggregator_key,
1660 agg->is_individual, agg->is_active);
1661 }
1662
1663 /* check if any partner replys */
1664 if (best->is_individual) {
1665 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1666 best->slave ?
1667 best->slave->bond->dev->name : "NULL");
1668 }
1669
1670 best->is_active = 1;
1671 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1672 best->aggregator_identifier);
1673 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1674 best->aggregator_identifier, best->num_of_ports,
1675 best->actor_oper_aggregator_key,
1676 best->partner_oper_aggregator_key,
1677 best->is_individual, best->is_active);
1678
1679 /* disable the ports that were related to the former
1680 * active_aggregator
1681 */
1682 if (active) {
1683 for (port = active->lag_ports; port;
1684 port = port->next_port_in_aggregator) {
1685 __disable_port(port);
1686 }
1687 }
1688 /* Slave array needs update. */
1689 *update_slave_arr = true;
1690 }
1691
1692 /* if the selected aggregator is of join individuals
1693 * (partner_system is NULL), enable their ports
1694 */
1695 active = __get_active_agg(origin);
1696
1697 if (active) {
1698 if (!__agg_has_partner(active)) {
1699 for (port = active->lag_ports; port;
1700 port = port->next_port_in_aggregator) {
1701 __enable_port(port);
1702 }
1703 }
1704 }
1705
1706 rcu_read_unlock();
1707
1708 bond_3ad_set_carrier(bond);
1709}
1710
1711/**
1712 * ad_clear_agg - clear a given aggregator's parameters
1713 * @aggregator: the aggregator we're looking at
1714 */
1715static void ad_clear_agg(struct aggregator *aggregator)
1716{
1717 if (aggregator) {
1718 aggregator->is_individual = false;
1719 aggregator->actor_admin_aggregator_key = 0;
1720 aggregator->actor_oper_aggregator_key = 0;
1721 aggregator->partner_system = null_mac_addr;
1722 aggregator->partner_system_priority = 0;
1723 aggregator->partner_oper_aggregator_key = 0;
1724 aggregator->receive_state = 0;
1725 aggregator->transmit_state = 0;
1726 aggregator->lag_ports = NULL;
1727 aggregator->is_active = 0;
1728 aggregator->num_of_ports = 0;
1729 pr_debug("LAG %d was cleared\n",
1730 aggregator->aggregator_identifier);
1731 }
1732}
1733
1734/**
1735 * ad_initialize_agg - initialize a given aggregator's parameters
1736 * @aggregator: the aggregator we're looking at
1737 */
1738static void ad_initialize_agg(struct aggregator *aggregator)
1739{
1740 if (aggregator) {
1741 ad_clear_agg(aggregator);
1742
1743 aggregator->aggregator_mac_address = null_mac_addr;
1744 aggregator->aggregator_identifier = 0;
1745 aggregator->slave = NULL;
1746 }
1747}
1748
1749/**
1750 * ad_initialize_port - initialize a given port's parameters
1751 * @aggregator: the aggregator we're looking at
1752 * @lacp_fast: boolean. whether fast periodic should be used
1753 */
1754static void ad_initialize_port(struct port *port, int lacp_fast)
1755{
1756 static const struct port_params tmpl = {
1757 .system_priority = 0xffff,
1758 .key = 1,
1759 .port_number = 1,
1760 .port_priority = 0xff,
1761 .port_state = 1,
1762 };
1763 static const struct lacpdu lacpdu = {
1764 .subtype = 0x01,
1765 .version_number = 0x01,
1766 .tlv_type_actor_info = 0x01,
1767 .actor_information_length = 0x14,
1768 .tlv_type_partner_info = 0x02,
1769 .partner_information_length = 0x14,
1770 .tlv_type_collector_info = 0x03,
1771 .collector_information_length = 0x10,
1772 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1773 };
1774
1775 if (port) {
1776 port->actor_port_priority = 0xff;
1777 port->actor_port_aggregator_identifier = 0;
1778 port->ntt = false;
1779 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1780 AD_STATE_LACP_ACTIVITY;
1781 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1782 AD_STATE_LACP_ACTIVITY;
1783
1784 if (lacp_fast)
1785 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1786
1787 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1788 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1789
1790 port->is_enabled = true;
1791 /* private parameters */
1792 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1793 port->sm_rx_state = 0;
1794 port->sm_rx_timer_counter = 0;
1795 port->sm_periodic_state = 0;
1796 port->sm_periodic_timer_counter = 0;
1797 port->sm_mux_state = 0;
1798 port->sm_mux_timer_counter = 0;
1799 port->sm_tx_state = 0;
1800 port->aggregator = NULL;
1801 port->next_port_in_aggregator = NULL;
1802 port->transaction_id = 0;
1803
1804 port->sm_churn_actor_timer_counter = 0;
1805 port->sm_churn_actor_state = 0;
1806 port->churn_actor_count = 0;
1807 port->sm_churn_partner_timer_counter = 0;
1808 port->sm_churn_partner_state = 0;
1809 port->churn_partner_count = 0;
1810
1811 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1812 }
1813}
1814
1815/**
1816 * ad_enable_collecting_distributing - enable a port's transmit/receive
1817 * @port: the port we're looking at
1818 * @update_slave_arr: Does slave array need update?
1819 *
1820 * Enable @port if it's in an active aggregator
1821 */
1822static void ad_enable_collecting_distributing(struct port *port,
1823 bool *update_slave_arr)
1824{
1825 if (port->aggregator->is_active) {
1826 pr_debug("Enabling port %d(LAG %d)\n",
1827 port->actor_port_number,
1828 port->aggregator->aggregator_identifier);
1829 __enable_port(port);
1830 /* Slave array needs update */
1831 *update_slave_arr = true;
1832 }
1833}
1834
1835/**
1836 * ad_disable_collecting_distributing - disable a port's transmit/receive
1837 * @port: the port we're looking at
1838 * @update_slave_arr: Does slave array need update?
1839 */
1840static void ad_disable_collecting_distributing(struct port *port,
1841 bool *update_slave_arr)
1842{
1843 if (port->aggregator &&
1844 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1845 &(null_mac_addr))) {
1846 pr_debug("Disabling port %d(LAG %d)\n",
1847 port->actor_port_number,
1848 port->aggregator->aggregator_identifier);
1849 __disable_port(port);
1850 /* Slave array needs an update */
1851 *update_slave_arr = true;
1852 }
1853}
1854
1855/**
1856 * ad_marker_info_received - handle receive of a Marker information frame
1857 * @marker_info: Marker info received
1858 * @port: the port we're looking at
1859 */
1860static void ad_marker_info_received(struct bond_marker *marker_info,
1861 struct port *port)
1862{
1863 struct bond_marker marker;
1864
1865 /* copy the received marker data to the response marker */
1866 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1867 /* change the marker subtype to marker response */
1868 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1869
1870 /* send the marker response */
1871 if (ad_marker_send(port, &marker) >= 0) {
1872 pr_debug("Sent Marker Response on port %d\n",
1873 port->actor_port_number);
1874 }
1875}
1876
1877/**
1878 * ad_marker_response_received - handle receive of a marker response frame
1879 * @marker: marker PDU received
1880 * @port: the port we're looking at
1881 *
1882 * This function does nothing since we decided not to implement send and handle
1883 * response for marker PDU's, in this stage, but only to respond to marker
1884 * information.
1885 */
1886static void ad_marker_response_received(struct bond_marker *marker,
1887 struct port *port)
1888{
1889 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1890}
1891
1892/* ========= AD exported functions to the main bonding code ========= */
1893
1894/* Check aggregators status in team every T seconds */
1895#define AD_AGGREGATOR_SELECTION_TIMER 8
1896
1897/**
1898 * bond_3ad_initiate_agg_selection - initate aggregator selection
1899 * @bond: bonding struct
1900 *
1901 * Set the aggregation selection timer, to initiate an agg selection in
1902 * the very near future. Called during first initialization, and during
1903 * any down to up transitions of the bond.
1904 */
1905void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1906{
1907 BOND_AD_INFO(bond).agg_select_timer = timeout;
1908}
1909
1910/**
1911 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1912 * @bond: bonding struct to work on
1913 * @tick_resolution: tick duration (millisecond resolution)
1914 *
1915 * Can be called only after the mac address of the bond is set.
1916 */
1917void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1918{
1919 /* check that the bond is not initialized yet */
1920 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1921 bond->dev->dev_addr)) {
1922
1923 BOND_AD_INFO(bond).aggregator_identifier = 0;
1924
1925 BOND_AD_INFO(bond).system.sys_priority =
1926 bond->params.ad_actor_sys_prio;
1927 if (is_zero_ether_addr(bond->params.ad_actor_system))
1928 BOND_AD_INFO(bond).system.sys_mac_addr =
1929 *((struct mac_addr *)bond->dev->dev_addr);
1930 else
1931 BOND_AD_INFO(bond).system.sys_mac_addr =
1932 *((struct mac_addr *)bond->params.ad_actor_system);
1933
1934 /* initialize how many times this module is called in one
1935 * second (should be about every 100ms)
1936 */
1937 ad_ticks_per_sec = tick_resolution;
1938
1939 bond_3ad_initiate_agg_selection(bond,
1940 AD_AGGREGATOR_SELECTION_TIMER *
1941 ad_ticks_per_sec);
1942 }
1943}
1944
1945/**
1946 * bond_3ad_bind_slave - initialize a slave's port
1947 * @slave: slave struct to work on
1948 *
1949 * Returns: 0 on success
1950 * < 0 on error
1951 */
1952void bond_3ad_bind_slave(struct slave *slave)
1953{
1954 struct bonding *bond = bond_get_bond_by_slave(slave);
1955 struct port *port;
1956 struct aggregator *aggregator;
1957
1958 /* check that the slave has not been initialized yet. */
1959 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1960
1961 /* port initialization */
1962 port = &(SLAVE_AD_INFO(slave)->port);
1963
1964 ad_initialize_port(port, bond->params.lacp_fast);
1965
1966 port->slave = slave;
1967 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
1968 /* key is determined according to the link speed, duplex and
1969 * user key
1970 */
1971 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
1972 ad_update_actor_keys(port, false);
1973 /* actor system is the bond's system */
1974 __ad_actor_update_port(port);
1975 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1976 * lacpdu's are sent in one second)
1977 */
1978 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1979
1980 __disable_port(port);
1981
1982 /* aggregator initialization */
1983 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1984
1985 ad_initialize_agg(aggregator);
1986
1987 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1988 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1989 aggregator->slave = slave;
1990 aggregator->is_active = 0;
1991 aggregator->num_of_ports = 0;
1992 }
1993}
1994
1995/**
1996 * bond_3ad_unbind_slave - deinitialize a slave's port
1997 * @slave: slave struct to work on
1998 *
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.
2002 */
2003void bond_3ad_unbind_slave(struct slave *slave)
2004{
2005 struct port *port, *prev_port, *temp_port;
2006 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2007 int select_new_active_agg = 0;
2008 struct bonding *bond = slave->bond;
2009 struct slave *slave_iter;
2010 struct list_head *iter;
2011 bool dummy_slave_update; /* Ignore this value as caller updates array */
2012
2013 /* Sync against bond_3ad_state_machine_handler() */
2014 spin_lock_bh(&bond->mode_lock);
2015 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2016 port = &(SLAVE_AD_INFO(slave)->port);
2017
2018 /* if slave is null, the whole port is not initialized */
2019 if (!port->slave) {
2020 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2021 slave->dev->name);
2022 goto out;
2023 }
2024
2025 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2026 aggregator->aggregator_identifier);
2027
2028 /* Tell the partner that this port is not suitable for aggregation */
2029 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2030 __update_lacpdu_from_port(port);
2031 ad_lacpdu_send(port);
2032
2033 /* check if this aggregator is occupied */
2034 if (aggregator->lag_ports) {
2035 /* check if there are other ports related to this aggregator
2036 * except the port related to this slave(thats ensure us that
2037 * there is a reason to search for new aggregator, and that we
2038 * will find one
2039 */
2040 if ((aggregator->lag_ports != port) ||
2041 (aggregator->lag_ports->next_port_in_aggregator)) {
2042 /* find new aggregator for the related port(s) */
2043 bond_for_each_slave(bond, slave_iter, iter) {
2044 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2045 /* if the new aggregator is empty, or it is
2046 * connected to our port only
2047 */
2048 if (!new_aggregator->lag_ports ||
2049 ((new_aggregator->lag_ports == port) &&
2050 !new_aggregator->lag_ports->next_port_in_aggregator))
2051 break;
2052 }
2053 if (!slave_iter)
2054 new_aggregator = NULL;
2055
2056 /* if new aggregator found, copy the aggregator's
2057 * parameters and connect the related lag_ports to the
2058 * new aggregator
2059 */
2060 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2061 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2062 aggregator->aggregator_identifier,
2063 new_aggregator->aggregator_identifier);
2064
2065 if ((new_aggregator->lag_ports == port) &&
2066 new_aggregator->is_active) {
2067 netdev_info(bond->dev, "Removing an active aggregator\n");
2068 select_new_active_agg = 1;
2069 }
2070
2071 new_aggregator->is_individual = aggregator->is_individual;
2072 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2073 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2074 new_aggregator->partner_system = aggregator->partner_system;
2075 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2076 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2077 new_aggregator->receive_state = aggregator->receive_state;
2078 new_aggregator->transmit_state = aggregator->transmit_state;
2079 new_aggregator->lag_ports = aggregator->lag_ports;
2080 new_aggregator->is_active = aggregator->is_active;
2081 new_aggregator->num_of_ports = aggregator->num_of_ports;
2082
2083 /* update the information that is written on
2084 * the ports about the aggregator
2085 */
2086 for (temp_port = aggregator->lag_ports; temp_port;
2087 temp_port = temp_port->next_port_in_aggregator) {
2088 temp_port->aggregator = new_aggregator;
2089 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2090 }
2091
2092 ad_clear_agg(aggregator);
2093
2094 if (select_new_active_agg)
2095 ad_agg_selection_logic(__get_first_agg(port),
2096 &dummy_slave_update);
2097 } else {
2098 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2099 }
2100 } else {
2101 /* in case that the only port related to this
2102 * aggregator is the one we want to remove
2103 */
2104 select_new_active_agg = aggregator->is_active;
2105 ad_clear_agg(aggregator);
2106 if (select_new_active_agg) {
2107 netdev_info(bond->dev, "Removing an active aggregator\n");
2108 /* select new active aggregator */
2109 temp_aggregator = __get_first_agg(port);
2110 if (temp_aggregator)
2111 ad_agg_selection_logic(temp_aggregator,
2112 &dummy_slave_update);
2113 }
2114 }
2115 }
2116
2117 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
2118
2119 /* find the aggregator that this port is connected to */
2120 bond_for_each_slave(bond, slave_iter, iter) {
2121 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2122 prev_port = NULL;
2123 /* search the port in the aggregator's related ports */
2124 for (temp_port = temp_aggregator->lag_ports; temp_port;
2125 prev_port = temp_port,
2126 temp_port = temp_port->next_port_in_aggregator) {
2127 if (temp_port == port) {
2128 /* the aggregator found - detach the port from
2129 * this aggregator
2130 */
2131 if (prev_port)
2132 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2133 else
2134 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2135 temp_aggregator->num_of_ports--;
2136 if (temp_aggregator->num_of_ports == 0) {
2137 select_new_active_agg = temp_aggregator->is_active;
2138 ad_clear_agg(temp_aggregator);
2139 if (select_new_active_agg) {
2140 netdev_info(bond->dev, "Removing an active aggregator\n");
2141 /* select new active aggregator */
2142 ad_agg_selection_logic(__get_first_agg(port),
2143 &dummy_slave_update);
2144 }
2145 }
2146 break;
2147 }
2148 }
2149 }
2150 port->slave = NULL;
2151
2152out:
2153 spin_unlock_bh(&bond->mode_lock);
2154}
2155
2156/**
2157 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2158 * @bond: bonding struct to work on
2159 *
2160 * If an ad_actor setting gets changed we need to update the individual port
2161 * settings so the bond device will use the new values when it gets upped.
2162 */
2163void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2164{
2165 struct list_head *iter;
2166 struct slave *slave;
2167
2168 ASSERT_RTNL();
2169
2170 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2171 if (is_zero_ether_addr(bond->params.ad_actor_system))
2172 BOND_AD_INFO(bond).system.sys_mac_addr =
2173 *((struct mac_addr *)bond->dev->dev_addr);
2174 else
2175 BOND_AD_INFO(bond).system.sys_mac_addr =
2176 *((struct mac_addr *)bond->params.ad_actor_system);
2177
2178 spin_lock_bh(&bond->mode_lock);
2179 bond_for_each_slave(bond, slave, iter) {
2180 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2181
2182 __ad_actor_update_port(port);
2183 port->ntt = true;
2184 }
2185 spin_unlock_bh(&bond->mode_lock);
2186}
2187
2188/**
2189 * bond_3ad_state_machine_handler - handle state machines timeout
2190 * @bond: bonding struct to work on
2191 *
2192 * The state machine handling concept in this module is to check every tick
2193 * which state machine should operate any function. The execution order is
2194 * round robin, so when we have an interaction between state machines, the
2195 * reply of one to each other might be delayed until next tick.
2196 *
2197 * This function also complete the initialization when the agg_select_timer
2198 * times out, and it selects an aggregator for the ports that are yet not
2199 * related to any aggregator, and selects the active aggregator for a bond.
2200 */
2201void bond_3ad_state_machine_handler(struct work_struct *work)
2202{
2203 struct bonding *bond = container_of(work, struct bonding,
2204 ad_work.work);
2205 struct aggregator *aggregator;
2206 struct list_head *iter;
2207 struct slave *slave;
2208 struct port *port;
2209 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2210 bool update_slave_arr = false;
2211
2212 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2213 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2214 * concurrently due to incoming LACPDU as well.
2215 */
2216 spin_lock_bh(&bond->mode_lock);
2217 rcu_read_lock();
2218
2219 /* check if there are any slaves */
2220 if (!bond_has_slaves(bond))
2221 goto re_arm;
2222
2223 /* check if agg_select_timer timer after initialize is timed out */
2224 if (BOND_AD_INFO(bond).agg_select_timer &&
2225 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2226 slave = bond_first_slave_rcu(bond);
2227 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2228
2229 /* select the active aggregator for the bond */
2230 if (port) {
2231 if (!port->slave) {
2232 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2233 bond->dev->name);
2234 goto re_arm;
2235 }
2236
2237 aggregator = __get_first_agg(port);
2238 ad_agg_selection_logic(aggregator, &update_slave_arr);
2239 }
2240 bond_3ad_set_carrier(bond);
2241 }
2242
2243 /* for each port run the state machines */
2244 bond_for_each_slave_rcu(bond, slave, iter) {
2245 port = &(SLAVE_AD_INFO(slave)->port);
2246 if (!port->slave) {
2247 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2248 bond->dev->name);
2249 goto re_arm;
2250 }
2251
2252 ad_rx_machine(NULL, port);
2253 ad_periodic_machine(port);
2254 ad_port_selection_logic(port, &update_slave_arr);
2255 ad_mux_machine(port, &update_slave_arr);
2256 ad_tx_machine(port);
2257 ad_churn_machine(port);
2258
2259 /* turn off the BEGIN bit, since we already handled it */
2260 if (port->sm_vars & AD_PORT_BEGIN)
2261 port->sm_vars &= ~AD_PORT_BEGIN;
2262 }
2263
2264re_arm:
2265 bond_for_each_slave_rcu(bond, slave, iter) {
2266 if (slave->should_notify) {
2267 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2268 break;
2269 }
2270 }
2271 rcu_read_unlock();
2272 spin_unlock_bh(&bond->mode_lock);
2273
2274 if (update_slave_arr)
2275 bond_slave_arr_work_rearm(bond, 0);
2276
2277 if (should_notify_rtnl && rtnl_trylock()) {
2278 bond_slave_state_notify(bond);
2279 rtnl_unlock();
2280 }
2281 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2282}
2283
2284/**
2285 * bond_3ad_rx_indication - handle a received frame
2286 * @lacpdu: received lacpdu
2287 * @slave: slave struct to work on
2288 * @length: length of the data received
2289 *
2290 * It is assumed that frames that were sent on this NIC don't returned as new
2291 * received frames (loopback). Since only the payload is given to this
2292 * function, it check for loopback.
2293 */
2294static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2295 u16 length)
2296{
2297 struct port *port;
2298 int ret = RX_HANDLER_ANOTHER;
2299
2300 if (length >= sizeof(struct lacpdu)) {
2301
2302 port = &(SLAVE_AD_INFO(slave)->port);
2303
2304 if (!port->slave) {
2305 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2306 slave->dev->name, slave->bond->dev->name);
2307 return ret;
2308 }
2309
2310 switch (lacpdu->subtype) {
2311 case AD_TYPE_LACPDU:
2312 ret = RX_HANDLER_CONSUMED;
2313 netdev_dbg(slave->bond->dev,
2314 "Received LACPDU on port %d slave %s\n",
2315 port->actor_port_number,
2316 slave->dev->name);
2317 /* Protect against concurrent state machines */
2318 spin_lock(&slave->bond->mode_lock);
2319 ad_rx_machine(lacpdu, port);
2320 spin_unlock(&slave->bond->mode_lock);
2321 break;
2322
2323 case AD_TYPE_MARKER:
2324 ret = RX_HANDLER_CONSUMED;
2325 /* No need to convert fields to Little Endian since we
2326 * don't use the marker's fields.
2327 */
2328
2329 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2330 case AD_MARKER_INFORMATION_SUBTYPE:
2331 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2332 port->actor_port_number);
2333 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2334 break;
2335
2336 case AD_MARKER_RESPONSE_SUBTYPE:
2337 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2338 port->actor_port_number);
2339 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2340 break;
2341
2342 default:
2343 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2344 port->actor_port_number);
2345 }
2346 }
2347 }
2348 return ret;
2349}
2350
2351/**
2352 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2353 * its current speed and duplex settings.
2354 *
2355 * @port: the port we'are looking at
2356 * @reset: Boolean to just reset the speed and the duplex part of the key
2357 *
2358 * The logic to change the oper / admin keys is:
2359 * (a) A full duplex port can participate in LACP with partner.
2360 * (b) When the speed is changed, LACP need to be reinitiated.
2361 */
2362static void ad_update_actor_keys(struct port *port, bool reset)
2363{
2364 u8 duplex = 0;
2365 u16 ospeed = 0, speed = 0;
2366 u16 old_oper_key = port->actor_oper_port_key;
2367
2368 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2369 if (!reset) {
2370 speed = __get_link_speed(port);
2371 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2372 duplex = __get_duplex(port);
2373 port->actor_admin_port_key |= (speed << 1) | duplex;
2374 }
2375 port->actor_oper_port_key = port->actor_admin_port_key;
2376
2377 if (old_oper_key != port->actor_oper_port_key) {
2378 /* Only 'duplex' port participates in LACP */
2379 if (duplex)
2380 port->sm_vars |= AD_PORT_LACP_ENABLED;
2381 else
2382 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2383
2384 if (!reset) {
2385 if (!speed) {
2386 netdev_err(port->slave->dev,
2387 "speed changed to 0 for port %s",
2388 port->slave->dev->name);
2389 } else if (duplex && ospeed != speed) {
2390 /* Speed change restarts LACP state-machine */
2391 port->sm_vars |= AD_PORT_BEGIN;
2392 }
2393 }
2394 }
2395}
2396
2397/**
2398 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2399 * change indication
2400 *
2401 * @slave: slave struct to work on
2402 *
2403 * Handle reselection of aggregator (if needed) for this port.
2404 */
2405void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2406{
2407 struct port *port;
2408
2409 port = &(SLAVE_AD_INFO(slave)->port);
2410
2411 /* if slave is null, the whole port is not initialized */
2412 if (!port->slave) {
2413 netdev_warn(slave->bond->dev,
2414 "speed/duplex changed for uninitialized port %s\n",
2415 slave->dev->name);
2416 return;
2417 }
2418
2419 spin_lock_bh(&slave->bond->mode_lock);
2420 ad_update_actor_keys(port, false);
2421 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
2422 port->actor_port_number, slave->dev->name);
2423 spin_unlock_bh(&slave->bond->mode_lock);
2424}
2425
2426/**
2427 * bond_3ad_handle_link_change - handle a slave's link status change indication
2428 * @slave: slave struct to work on
2429 * @status: whether the link is now up or down
2430 *
2431 * Handle reselection of aggregator (if needed) for this port.
2432 */
2433void bond_3ad_handle_link_change(struct slave *slave, char link)
2434{
2435 struct port *port;
2436
2437 port = &(SLAVE_AD_INFO(slave)->port);
2438
2439 /* if slave is null, the whole port is not initialized */
2440 if (!port->slave) {
2441 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2442 slave->dev->name);
2443 return;
2444 }
2445
2446 spin_lock_bh(&slave->bond->mode_lock);
2447 /* on link down we are zeroing duplex and speed since
2448 * some of the adaptors(ce1000.lan) report full duplex/speed
2449 * instead of N/A(duplex) / 0(speed).
2450 *
2451 * on link up we are forcing recheck on the duplex and speed since
2452 * some of he adaptors(ce1000.lan) report.
2453 */
2454 if (link == BOND_LINK_UP) {
2455 port->is_enabled = true;
2456 ad_update_actor_keys(port, false);
2457 } else {
2458 /* link has failed */
2459 port->is_enabled = false;
2460 ad_update_actor_keys(port, true);
2461 }
2462 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2463 port->actor_port_number,
2464 link == BOND_LINK_UP ? "UP" : "DOWN");
2465
2466 spin_unlock_bh(&slave->bond->mode_lock);
2467
2468 /* RTNL is held and mode_lock is released so it's safe
2469 * to update slave_array here.
2470 */
2471 bond_update_slave_arr(slave->bond, NULL);
2472}
2473
2474/**
2475 * bond_3ad_set_carrier - set link state for bonding master
2476 * @bond - bonding structure
2477 *
2478 * if we have an active aggregator, we're up, if not, we're down.
2479 * Presumes that we cannot have an active aggregator if there are
2480 * no slaves with link up.
2481 *
2482 * This behavior complies with IEEE 802.3 section 43.3.9.
2483 *
2484 * Called by bond_set_carrier(). Return zero if carrier state does not
2485 * change, nonzero if it does.
2486 */
2487int bond_3ad_set_carrier(struct bonding *bond)
2488{
2489 struct aggregator *active;
2490 struct slave *first_slave;
2491 int ret = 1;
2492
2493 rcu_read_lock();
2494 first_slave = bond_first_slave_rcu(bond);
2495 if (!first_slave) {
2496 ret = 0;
2497 goto out;
2498 }
2499 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2500 if (active) {
2501 /* are enough slaves available to consider link up? */
2502 if (active->num_of_ports < bond->params.min_links) {
2503 if (netif_carrier_ok(bond->dev)) {
2504 netif_carrier_off(bond->dev);
2505 goto out;
2506 }
2507 } else if (!netif_carrier_ok(bond->dev)) {
2508 netif_carrier_on(bond->dev);
2509 goto out;
2510 }
2511 } else if (netif_carrier_ok(bond->dev)) {
2512 netif_carrier_off(bond->dev);
2513 }
2514out:
2515 rcu_read_unlock();
2516 return ret;
2517}
2518
2519/**
2520 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2521 * @bond: bonding struct to work on
2522 * @ad_info: ad_info struct to fill with the bond's info
2523 *
2524 * Returns: 0 on success
2525 * < 0 on error
2526 */
2527int __bond_3ad_get_active_agg_info(struct bonding *bond,
2528 struct ad_info *ad_info)
2529{
2530 struct aggregator *aggregator = NULL;
2531 struct list_head *iter;
2532 struct slave *slave;
2533 struct port *port;
2534
2535 bond_for_each_slave_rcu(bond, slave, iter) {
2536 port = &(SLAVE_AD_INFO(slave)->port);
2537 if (port->aggregator && port->aggregator->is_active) {
2538 aggregator = port->aggregator;
2539 break;
2540 }
2541 }
2542
2543 if (!aggregator)
2544 return -1;
2545
2546 ad_info->aggregator_id = aggregator->aggregator_identifier;
2547 ad_info->ports = aggregator->num_of_ports;
2548 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2549 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2550 ether_addr_copy(ad_info->partner_system,
2551 aggregator->partner_system.mac_addr_value);
2552 return 0;
2553}
2554
2555int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2556{
2557 int ret;
2558
2559 rcu_read_lock();
2560 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2561 rcu_read_unlock();
2562
2563 return ret;
2564}
2565
2566int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2567 struct slave *slave)
2568{
2569 struct lacpdu *lacpdu, _lacpdu;
2570
2571 if (skb->protocol != PKT_TYPE_LACPDU)
2572 return RX_HANDLER_ANOTHER;
2573
2574 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2575 return RX_HANDLER_ANOTHER;
2576
2577 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2578 if (!lacpdu)
2579 return RX_HANDLER_ANOTHER;
2580
2581 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
2582}
2583
2584/**
2585 * bond_3ad_update_lacp_rate - change the lacp rate
2586 * @bond - bonding struct
2587 *
2588 * When modify lacp_rate parameter via sysfs,
2589 * update actor_oper_port_state of each port.
2590 *
2591 * Hold bond->mode_lock,
2592 * so we can modify port->actor_oper_port_state,
2593 * no matter bond is up or down.
2594 */
2595void bond_3ad_update_lacp_rate(struct bonding *bond)
2596{
2597 struct port *port = NULL;
2598 struct list_head *iter;
2599 struct slave *slave;
2600 int lacp_fast;
2601
2602 lacp_fast = bond->params.lacp_fast;
2603 spin_lock_bh(&bond->mode_lock);
2604 bond_for_each_slave(bond, slave, iter) {
2605 port = &(SLAVE_AD_INFO(slave)->port);
2606 if (lacp_fast)
2607 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2608 else
2609 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2610 }
2611 spin_unlock_bh(&bond->mode_lock);
2612}