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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 802.3ad standard)
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
74// Port Key definitions
75// key is determined according to the link speed, duplex and
76// user key(which is yet not supported)
77// ------------------------------------------------------------
78// Port key : | User key | Speed |Duplex|
79// ------------------------------------------------------------
80// 16 6 1 0
81#define AD_DUPLEX_KEY_BITS 0x1
82#define AD_SPEED_KEY_BITS 0x3E
83#define AD_USER_KEY_BITS 0xFFC0
84
85//dalloun
86#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
87#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
88#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
89#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
90#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
91//endalloun
92
93// compare MAC addresses
94#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
95
96static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
97static u16 ad_ticks_per_sec;
98static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
99
100static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
101
102// ================= main 802.3ad protocol functions ==================
103static int ad_lacpdu_send(struct port *port);
104static int ad_marker_send(struct port *port, struct bond_marker *marker);
105static void ad_mux_machine(struct port *port);
106static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
107static void ad_tx_machine(struct port *port);
108static void ad_periodic_machine(struct port *port);
109static void ad_port_selection_logic(struct port *port);
110static void ad_agg_selection_logic(struct aggregator *aggregator);
111static void ad_clear_agg(struct aggregator *aggregator);
112static void ad_initialize_agg(struct aggregator *aggregator);
113static void ad_initialize_port(struct port *port, int lacp_fast);
114static void ad_enable_collecting_distributing(struct port *port);
115static void ad_disable_collecting_distributing(struct port *port);
116static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
117static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
118
119
120/////////////////////////////////////////////////////////////////////////////////
121// ================= api to bonding and kernel code ==================
122/////////////////////////////////////////////////////////////////////////////////
123
124/**
125 * __get_bond_by_port - get the port's bonding struct
126 * @port: the port we're looking at
127 *
128 * Return @port's bonding struct, or %NULL if it can't be found.
129 */
130static inline struct bonding *__get_bond_by_port(struct port *port)
131{
132 if (port->slave == NULL)
133 return NULL;
134
135 return bond_get_bond_by_slave(port->slave);
136}
137
138/**
139 * __get_first_port - get the first port in the bond
140 * @bond: the bond we're looking at
141 *
142 * Return the port of the first slave in @bond, or %NULL if it can't be found.
143 */
144static inline struct port *__get_first_port(struct bonding *bond)
145{
146 if (bond->slave_cnt == 0)
147 return NULL;
148
149 return &(SLAVE_AD_INFO(bond->first_slave).port);
150}
151
152/**
153 * __get_next_port - get the next port in the bond
154 * @port: the port we're looking at
155 *
156 * Return the port of the slave that is next in line of @port's slave in the
157 * bond, or %NULL if it can't be found.
158 */
159static inline struct port *__get_next_port(struct port *port)
160{
161 struct bonding *bond = __get_bond_by_port(port);
162 struct slave *slave = port->slave;
163
164 // If there's no bond for this port, or this is the last slave
165 if ((bond == NULL) || (slave->next == bond->first_slave))
166 return NULL;
167
168 return &(SLAVE_AD_INFO(slave->next).port);
169}
170
171/**
172 * __get_first_agg - get the first aggregator in the bond
173 * @bond: the bond we're looking at
174 *
175 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
176 * found.
177 */
178static inline struct aggregator *__get_first_agg(struct port *port)
179{
180 struct bonding *bond = __get_bond_by_port(port);
181
182 // If there's no bond for this port, or bond has no slaves
183 if ((bond == NULL) || (bond->slave_cnt == 0))
184 return NULL;
185
186 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
187}
188
189/**
190 * __get_next_agg - get the next aggregator in the bond
191 * @aggregator: the aggregator we're looking at
192 *
193 * Return the aggregator of the slave that is next in line of @aggregator's
194 * slave in the bond, or %NULL if it can't be found.
195 */
196static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
197{
198 struct slave *slave = aggregator->slave;
199 struct bonding *bond = bond_get_bond_by_slave(slave);
200
201 // If there's no bond for this aggregator, or this is the last slave
202 if ((bond == NULL) || (slave->next == bond->first_slave))
203 return NULL;
204
205 return &(SLAVE_AD_INFO(slave->next).aggregator);
206}
207
208/*
209 * __agg_has_partner
210 *
211 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
212 * address for the partner). Return 0 if not.
213 */
214static inline int __agg_has_partner(struct aggregator *agg)
215{
216 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
217}
218
219/**
220 * __disable_port - disable the port's slave
221 * @port: the port we're looking at
222 *
223 */
224static inline void __disable_port(struct port *port)
225{
226 bond_set_slave_inactive_flags(port->slave);
227}
228
229/**
230 * __enable_port - enable the port's slave, if it's up
231 * @port: the port we're looking at
232 *
233 */
234static inline void __enable_port(struct port *port)
235{
236 struct slave *slave = port->slave;
237
238 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
239 bond_set_slave_active_flags(slave);
240}
241
242/**
243 * __port_is_enabled - check if the port's slave is in active state
244 * @port: the port we're looking at
245 *
246 */
247static inline int __port_is_enabled(struct port *port)
248{
249 return bond_is_active_slave(port->slave);
250}
251
252/**
253 * __get_agg_selection_mode - get the aggregator selection mode
254 * @port: the port we're looking at
255 *
256 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
257 */
258static inline u32 __get_agg_selection_mode(struct port *port)
259{
260 struct bonding *bond = __get_bond_by_port(port);
261
262 if (bond == NULL)
263 return BOND_AD_STABLE;
264
265 return bond->params.ad_select;
266}
267
268/**
269 * __check_agg_selection_timer - check if the selection timer has expired
270 * @port: the port we're looking at
271 *
272 */
273static inline int __check_agg_selection_timer(struct port *port)
274{
275 struct bonding *bond = __get_bond_by_port(port);
276
277 if (bond == NULL)
278 return 0;
279
280 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
281}
282
283/**
284 * __get_state_machine_lock - lock the port's state machines
285 * @port: the port we're looking at
286 *
287 */
288static inline void __get_state_machine_lock(struct port *port)
289{
290 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
291}
292
293/**
294 * __release_state_machine_lock - unlock the port's state machines
295 * @port: the port we're looking at
296 *
297 */
298static inline void __release_state_machine_lock(struct port *port)
299{
300 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
301}
302
303/**
304 * __get_link_speed - get a port's speed
305 * @port: the port we're looking at
306 *
307 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
308 * 0,
309 * %AD_LINK_SPEED_BITMASK_10MBPS,
310 * %AD_LINK_SPEED_BITMASK_100MBPS,
311 * %AD_LINK_SPEED_BITMASK_1000MBPS,
312 * %AD_LINK_SPEED_BITMASK_10000MBPS
313 */
314static u16 __get_link_speed(struct port *port)
315{
316 struct slave *slave = port->slave;
317 u16 speed;
318
319 /* this if covers only a special case: when the configuration starts with
320 * link down, it sets the speed to 0.
321 * This is done in spite of the fact that the e100 driver reports 0 to be
322 * compatible with MVT in the future.*/
323 if (slave->link != BOND_LINK_UP)
324 speed = 0;
325 else {
326 switch (slave->speed) {
327 case SPEED_10:
328 speed = AD_LINK_SPEED_BITMASK_10MBPS;
329 break;
330
331 case SPEED_100:
332 speed = AD_LINK_SPEED_BITMASK_100MBPS;
333 break;
334
335 case SPEED_1000:
336 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
337 break;
338
339 case SPEED_10000:
340 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
341 break;
342
343 default:
344 speed = 0; // unknown speed value from ethtool. shouldn't happen
345 break;
346 }
347 }
348
349 pr_debug("Port %d Received link speed %d update from adapter\n",
350 port->actor_port_number, speed);
351 return speed;
352}
353
354/**
355 * __get_duplex - get a port's duplex
356 * @port: the port we're looking at
357 *
358 * Return @port's duplex in 802.3ad bitmask format. i.e.:
359 * 0x01 if in full duplex
360 * 0x00 otherwise
361 */
362static u8 __get_duplex(struct port *port)
363{
364 struct slave *slave = port->slave;
365
366 u8 retval;
367
368 // handling a special case: when the configuration starts with
369 // link down, it sets the duplex to 0.
370 if (slave->link != BOND_LINK_UP)
371 retval = 0x0;
372 else {
373 switch (slave->duplex) {
374 case DUPLEX_FULL:
375 retval = 0x1;
376 pr_debug("Port %d Received status full duplex update from adapter\n",
377 port->actor_port_number);
378 break;
379 case DUPLEX_HALF:
380 default:
381 retval = 0x0;
382 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
383 port->actor_port_number);
384 break;
385 }
386 }
387 return retval;
388}
389
390/**
391 * __initialize_port_locks - initialize a port's STATE machine spinlock
392 * @port: the port we're looking at
393 *
394 */
395static inline void __initialize_port_locks(struct port *port)
396{
397 // make sure it isn't called twice
398 spin_lock_init(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
399}
400
401//conversions
402
403/**
404 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
405 * @timer_type: which timer to operate
406 * @par: timer parameter. see below
407 *
408 * If @timer_type is %current_while_timer, @par indicates long/short timer.
409 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
410 * %SLOW_PERIODIC_TIME.
411 */
412static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
413{
414 u16 retval = 0; /* to silence the compiler */
415
416 switch (timer_type) {
417 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
418 if (par)
419 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
420 else
421 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
422 break;
423 case AD_ACTOR_CHURN_TIMER: // for local churn machine
424 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
425 break;
426 case AD_PERIODIC_TIMER: // for periodic machine
427 retval = (par*ad_ticks_per_sec); // long timeout
428 break;
429 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
430 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
431 break;
432 case AD_WAIT_WHILE_TIMER: // for selection machine
433 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
434 break;
435 }
436 return retval;
437}
438
439
440/////////////////////////////////////////////////////////////////////////////////
441// ================= ad_rx_machine helper functions ==================
442/////////////////////////////////////////////////////////////////////////////////
443
444/**
445 * __choose_matched - update a port's matched variable from a received lacpdu
446 * @lacpdu: the lacpdu we've received
447 * @port: the port we're looking at
448 *
449 * Update the value of the matched variable, using parameter values from a
450 * newly received lacpdu. Parameter values for the partner carried in the
451 * received PDU are compared with the corresponding operational parameter
452 * values for the actor. Matched is set to TRUE if all of these parameters
453 * match and the PDU parameter partner_state.aggregation has the same value as
454 * actor_oper_port_state.aggregation and lacp will actively maintain the link
455 * in the aggregation. Matched is also set to TRUE if the value of
456 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
457 * an individual link and lacp will actively maintain the link. Otherwise,
458 * matched is set to FALSE. LACP is considered to be actively maintaining the
459 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
460 * the actor's actor_oper_port_state.lacp_activity and the PDU's
461 * partner_state.lacp_activity variables are TRUE.
462 *
463 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
464 * used here to implement the language from 802.3ad 43.4.9 that requires
465 * recordPDU to "match" the LACPDU parameters to the stored values.
466 */
467static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
468{
469 // check if all parameters are alike
470 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
471 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
472 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
473 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
474 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
475 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
476 // or this is individual link(aggregation == FALSE)
477 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
478 ) {
479 // update the state machine Matched variable
480 port->sm_vars |= AD_PORT_MATCHED;
481 } else {
482 port->sm_vars &= ~AD_PORT_MATCHED;
483 }
484}
485
486/**
487 * __record_pdu - record parameters from a received lacpdu
488 * @lacpdu: the lacpdu we've received
489 * @port: the port we're looking at
490 *
491 * Record the parameter values for the Actor carried in a received lacpdu as
492 * the current partner operational parameter values and sets
493 * actor_oper_port_state.defaulted to FALSE.
494 */
495static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
496{
497 if (lacpdu && port) {
498 struct port_params *partner = &port->partner_oper;
499
500 __choose_matched(lacpdu, port);
501 // record the new parameter values for the partner operational
502 partner->port_number = ntohs(lacpdu->actor_port);
503 partner->port_priority = ntohs(lacpdu->actor_port_priority);
504 partner->system = lacpdu->actor_system;
505 partner->system_priority = ntohs(lacpdu->actor_system_priority);
506 partner->key = ntohs(lacpdu->actor_key);
507 partner->port_state = lacpdu->actor_state;
508
509 // set actor_oper_port_state.defaulted to FALSE
510 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
511
512 // set the partner sync. to on if the partner is sync. and the port is matched
513 if ((port->sm_vars & AD_PORT_MATCHED)
514 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
515 partner->port_state |= AD_STATE_SYNCHRONIZATION;
516 else
517 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
518 }
519}
520
521/**
522 * __record_default - record default parameters
523 * @port: the port we're looking at
524 *
525 * This function records the default parameter values for the partner carried
526 * in the Partner Admin parameters as the current partner operational parameter
527 * values and sets actor_oper_port_state.defaulted to TRUE.
528 */
529static void __record_default(struct port *port)
530{
531 if (port) {
532 // record the partner admin parameters
533 memcpy(&port->partner_oper, &port->partner_admin,
534 sizeof(struct port_params));
535
536 // set actor_oper_port_state.defaulted to true
537 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
538 }
539}
540
541/**
542 * __update_selected - update a port's Selected variable from a received lacpdu
543 * @lacpdu: the lacpdu we've received
544 * @port: the port we're looking at
545 *
546 * Update the value of the selected variable, using parameter values from a
547 * newly received lacpdu. The parameter values for the Actor carried in the
548 * received PDU are compared with the corresponding operational parameter
549 * values for the ports partner. If one or more of the comparisons shows that
550 * the value(s) received in the PDU differ from the current operational values,
551 * then selected is set to FALSE and actor_oper_port_state.synchronization is
552 * set to out_of_sync. Otherwise, selected remains unchanged.
553 */
554static void __update_selected(struct lacpdu *lacpdu, struct port *port)
555{
556 if (lacpdu && port) {
557 const struct port_params *partner = &port->partner_oper;
558
559 // check if any parameter is different
560 if (ntohs(lacpdu->actor_port) != partner->port_number ||
561 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
562 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
563 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
564 ntohs(lacpdu->actor_key) != partner->key ||
565 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
566 // update the state machine Selected variable
567 port->sm_vars &= ~AD_PORT_SELECTED;
568 }
569 }
570}
571
572/**
573 * __update_default_selected - update a port's Selected variable from Partner
574 * @port: the port we're looking at
575 *
576 * This function updates the value of the selected variable, using the partner
577 * administrative parameter values. The administrative values are compared with
578 * the corresponding operational parameter values for the partner. If one or
579 * more of the comparisons shows that the administrative value(s) differ from
580 * the current operational values, then Selected is set to FALSE and
581 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
582 * Selected remains unchanged.
583 */
584static void __update_default_selected(struct port *port)
585{
586 if (port) {
587 const struct port_params *admin = &port->partner_admin;
588 const struct port_params *oper = &port->partner_oper;
589
590 // check if any parameter is different
591 if (admin->port_number != oper->port_number ||
592 admin->port_priority != oper->port_priority ||
593 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
594 admin->system_priority != oper->system_priority ||
595 admin->key != oper->key ||
596 (admin->port_state & AD_STATE_AGGREGATION)
597 != (oper->port_state & AD_STATE_AGGREGATION)) {
598 // update the state machine Selected variable
599 port->sm_vars &= ~AD_PORT_SELECTED;
600 }
601 }
602}
603
604/**
605 * __update_ntt - update a port's ntt variable from a received lacpdu
606 * @lacpdu: the lacpdu we've received
607 * @port: the port we're looking at
608 *
609 * Updates the value of the ntt variable, using parameter values from a newly
610 * received lacpdu. The parameter values for the partner carried in the
611 * received PDU are compared with the corresponding operational parameter
612 * values for the Actor. If one or more of the comparisons shows that the
613 * value(s) received in the PDU differ from the current operational values,
614 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
615 */
616static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
617{
618 // validate lacpdu and port
619 if (lacpdu && port) {
620 // check if any parameter is different
621 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
622 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
623 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
624 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
625 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
626 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
627 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
628 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
629 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
630 ) {
631
632 port->ntt = true;
633 }
634 }
635}
636
637/**
638 * __attach_bond_to_agg
639 * @port: the port we're looking at
640 *
641 * Handle the attaching of the port's control parser/multiplexer and the
642 * aggregator. This function does nothing since the parser/multiplexer of the
643 * receive and the parser/multiplexer of the aggregator are already combined.
644 */
645static void __attach_bond_to_agg(struct port *port)
646{
647 port = NULL; /* just to satisfy the compiler */
648 // This function does nothing since the parser/multiplexer of the receive
649 // and the parser/multiplexer of the aggregator are already combined
650}
651
652/**
653 * __detach_bond_from_agg
654 * @port: the port we're looking at
655 *
656 * Handle the detaching of the port's control parser/multiplexer from the
657 * aggregator. This function does nothing since the parser/multiplexer of the
658 * receive and the parser/multiplexer of the aggregator are already combined.
659 */
660static void __detach_bond_from_agg(struct port *port)
661{
662 port = NULL; /* just to satisfy the compiler */
663 // This function does nothing sience the parser/multiplexer of the receive
664 // and the parser/multiplexer of the aggregator are already combined
665}
666
667/**
668 * __agg_ports_are_ready - check if all ports in an aggregator are ready
669 * @aggregator: the aggregator we're looking at
670 *
671 */
672static int __agg_ports_are_ready(struct aggregator *aggregator)
673{
674 struct port *port;
675 int retval = 1;
676
677 if (aggregator) {
678 // scan all ports in this aggregator to verfy if they are all ready
679 for (port = aggregator->lag_ports;
680 port;
681 port = port->next_port_in_aggregator) {
682 if (!(port->sm_vars & AD_PORT_READY_N)) {
683 retval = 0;
684 break;
685 }
686 }
687 }
688
689 return retval;
690}
691
692/**
693 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
694 * @aggregator: the aggregator we're looking at
695 * @val: Should the ports' ready bit be set on or off
696 *
697 */
698static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
699{
700 struct port *port;
701
702 for (port = aggregator->lag_ports; port;
703 port = port->next_port_in_aggregator) {
704 if (val)
705 port->sm_vars |= AD_PORT_READY;
706 else
707 port->sm_vars &= ~AD_PORT_READY;
708 }
709}
710
711/**
712 * __get_agg_bandwidth - get the total bandwidth of an aggregator
713 * @aggregator: the aggregator we're looking at
714 *
715 */
716static u32 __get_agg_bandwidth(struct aggregator *aggregator)
717{
718 u32 bandwidth = 0;
719
720 if (aggregator->num_of_ports) {
721 switch (__get_link_speed(aggregator->lag_ports)) {
722 case AD_LINK_SPEED_BITMASK_1MBPS:
723 bandwidth = aggregator->num_of_ports;
724 break;
725 case AD_LINK_SPEED_BITMASK_10MBPS:
726 bandwidth = aggregator->num_of_ports * 10;
727 break;
728 case AD_LINK_SPEED_BITMASK_100MBPS:
729 bandwidth = aggregator->num_of_ports * 100;
730 break;
731 case AD_LINK_SPEED_BITMASK_1000MBPS:
732 bandwidth = aggregator->num_of_ports * 1000;
733 break;
734 case AD_LINK_SPEED_BITMASK_10000MBPS:
735 bandwidth = aggregator->num_of_ports * 10000;
736 break;
737 default:
738 bandwidth = 0; /*to silence the compiler ....*/
739 }
740 }
741 return bandwidth;
742}
743
744/**
745 * __get_active_agg - get the current active aggregator
746 * @aggregator: the aggregator we're looking at
747 *
748 */
749static struct aggregator *__get_active_agg(struct aggregator *aggregator)
750{
751 struct aggregator *retval = NULL;
752
753 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
754 if (aggregator->is_active) {
755 retval = aggregator;
756 break;
757 }
758 }
759
760 return retval;
761}
762
763/**
764 * __update_lacpdu_from_port - update a port's lacpdu fields
765 * @port: the port we're looking at
766 *
767 */
768static inline void __update_lacpdu_from_port(struct port *port)
769{
770 struct lacpdu *lacpdu = &port->lacpdu;
771 const struct port_params *partner = &port->partner_oper;
772
773 /* update current actual Actor parameters */
774 /* lacpdu->subtype initialized
775 * lacpdu->version_number initialized
776 * lacpdu->tlv_type_actor_info initialized
777 * lacpdu->actor_information_length initialized
778 */
779
780 lacpdu->actor_system_priority = htons(port->actor_system_priority);
781 lacpdu->actor_system = port->actor_system;
782 lacpdu->actor_key = htons(port->actor_oper_port_key);
783 lacpdu->actor_port_priority = htons(port->actor_port_priority);
784 lacpdu->actor_port = htons(port->actor_port_number);
785 lacpdu->actor_state = port->actor_oper_port_state;
786
787 /* lacpdu->reserved_3_1 initialized
788 * lacpdu->tlv_type_partner_info initialized
789 * lacpdu->partner_information_length initialized
790 */
791
792 lacpdu->partner_system_priority = htons(partner->system_priority);
793 lacpdu->partner_system = partner->system;
794 lacpdu->partner_key = htons(partner->key);
795 lacpdu->partner_port_priority = htons(partner->port_priority);
796 lacpdu->partner_port = htons(partner->port_number);
797 lacpdu->partner_state = partner->port_state;
798
799 /* lacpdu->reserved_3_2 initialized
800 * lacpdu->tlv_type_collector_info initialized
801 * lacpdu->collector_information_length initialized
802 * collector_max_delay initialized
803 * reserved_12[12] initialized
804 * tlv_type_terminator initialized
805 * terminator_length initialized
806 * reserved_50[50] initialized
807 */
808}
809
810//////////////////////////////////////////////////////////////////////////////////////
811// ================= main 802.3ad protocol code ======================================
812//////////////////////////////////////////////////////////////////////////////////////
813
814/**
815 * ad_lacpdu_send - send out a lacpdu packet on a given port
816 * @port: the port we're looking at
817 *
818 * Returns: 0 on success
819 * < 0 on error
820 */
821static int ad_lacpdu_send(struct port *port)
822{
823 struct slave *slave = port->slave;
824 struct sk_buff *skb;
825 struct lacpdu_header *lacpdu_header;
826 int length = sizeof(struct lacpdu_header);
827
828 skb = dev_alloc_skb(length);
829 if (!skb)
830 return -ENOMEM;
831
832 skb->dev = slave->dev;
833 skb_reset_mac_header(skb);
834 skb->network_header = skb->mac_header + ETH_HLEN;
835 skb->protocol = PKT_TYPE_LACPDU;
836 skb->priority = TC_PRIO_CONTROL;
837
838 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
839
840 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
841 /* Note: source address is set to be the member's PERMANENT address,
842 because we use it to identify loopback lacpdus in receive. */
843 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
844 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
845
846 lacpdu_header->lacpdu = port->lacpdu; // struct copy
847
848 dev_queue_xmit(skb);
849
850 return 0;
851}
852
853/**
854 * ad_marker_send - send marker information/response on a given port
855 * @port: the port we're looking at
856 * @marker: marker data to send
857 *
858 * Returns: 0 on success
859 * < 0 on error
860 */
861static int ad_marker_send(struct port *port, struct bond_marker *marker)
862{
863 struct slave *slave = port->slave;
864 struct sk_buff *skb;
865 struct bond_marker_header *marker_header;
866 int length = sizeof(struct bond_marker_header);
867
868 skb = dev_alloc_skb(length + 16);
869 if (!skb)
870 return -ENOMEM;
871
872 skb_reserve(skb, 16);
873
874 skb->dev = slave->dev;
875 skb_reset_mac_header(skb);
876 skb->network_header = skb->mac_header + ETH_HLEN;
877 skb->protocol = PKT_TYPE_LACPDU;
878
879 marker_header = (struct bond_marker_header *)skb_put(skb, length);
880
881 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
882 /* Note: source address is set to be the member's PERMANENT address,
883 because we use it to identify loopback MARKERs in receive. */
884 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
885 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
886
887 marker_header->marker = *marker; // struct copy
888
889 dev_queue_xmit(skb);
890
891 return 0;
892}
893
894/**
895 * ad_mux_machine - handle a port's mux state machine
896 * @port: the port we're looking at
897 *
898 */
899static void ad_mux_machine(struct port *port)
900{
901 mux_states_t last_state;
902
903 // keep current State Machine state to compare later if it was changed
904 last_state = port->sm_mux_state;
905
906 if (port->sm_vars & AD_PORT_BEGIN) {
907 port->sm_mux_state = AD_MUX_DETACHED; // next state
908 } else {
909 switch (port->sm_mux_state) {
910 case AD_MUX_DETACHED:
911 if ((port->sm_vars & AD_PORT_SELECTED)
912 || (port->sm_vars & AD_PORT_STANDBY))
913 /* if SELECTED or STANDBY */
914 port->sm_mux_state = AD_MUX_WAITING; // next state
915 break;
916 case AD_MUX_WAITING:
917 // if SELECTED == FALSE return to DETACH state
918 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
919 port->sm_vars &= ~AD_PORT_READY_N;
920 // in order to withhold the Selection Logic to check all ports READY_N value
921 // every callback cycle to update ready variable, we check READY_N and update READY here
922 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
923 port->sm_mux_state = AD_MUX_DETACHED; // next state
924 break;
925 }
926
927 // check if the wait_while_timer expired
928 if (port->sm_mux_timer_counter
929 && !(--port->sm_mux_timer_counter))
930 port->sm_vars |= AD_PORT_READY_N;
931
932 // in order to withhold the selection logic to check all ports READY_N value
933 // every callback cycle to update ready variable, we check READY_N and update READY here
934 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
935
936 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
937 if ((port->sm_vars & AD_PORT_READY)
938 && !port->sm_mux_timer_counter)
939 port->sm_mux_state = AD_MUX_ATTACHED; // next state
940 break;
941 case AD_MUX_ATTACHED:
942 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
943 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
944 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
945 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
946 port->sm_vars &= ~AD_PORT_READY_N;
947 // in order to withhold the selection logic to check all ports READY_N value
948 // every callback cycle to update ready variable, we check READY_N and update READY here
949 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
950 port->sm_mux_state = AD_MUX_DETACHED;// next state
951 }
952 break;
953 case AD_MUX_COLLECTING_DISTRIBUTING:
954 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
955 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
956 ) {
957 port->sm_mux_state = AD_MUX_ATTACHED;// next state
958
959 } else {
960 // if port state hasn't changed make
961 // sure that a collecting distributing
962 // port in an active aggregator is enabled
963 if (port->aggregator &&
964 port->aggregator->is_active &&
965 !__port_is_enabled(port)) {
966
967 __enable_port(port);
968 }
969 }
970 break;
971 default: //to silence the compiler
972 break;
973 }
974 }
975
976 // check if the state machine was changed
977 if (port->sm_mux_state != last_state) {
978 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
979 port->actor_port_number, last_state,
980 port->sm_mux_state);
981 switch (port->sm_mux_state) {
982 case AD_MUX_DETACHED:
983 __detach_bond_from_agg(port);
984 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
985 ad_disable_collecting_distributing(port);
986 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
987 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
988 port->ntt = true;
989 break;
990 case AD_MUX_WAITING:
991 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
992 break;
993 case AD_MUX_ATTACHED:
994 __attach_bond_to_agg(port);
995 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
996 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
997 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
998 ad_disable_collecting_distributing(port);
999 port->ntt = true;
1000 break;
1001 case AD_MUX_COLLECTING_DISTRIBUTING:
1002 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1003 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1004 ad_enable_collecting_distributing(port);
1005 port->ntt = true;
1006 break;
1007 default: //to silence the compiler
1008 break;
1009 }
1010 }
1011}
1012
1013/**
1014 * ad_rx_machine - handle a port's rx State Machine
1015 * @lacpdu: the lacpdu we've received
1016 * @port: the port we're looking at
1017 *
1018 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1019 * CURRENT. If timer expired set the state machine in the proper state.
1020 * In other cases, this function checks if we need to switch to other state.
1021 */
1022static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1023{
1024 rx_states_t last_state;
1025
1026 // keep current State Machine state to compare later if it was changed
1027 last_state = port->sm_rx_state;
1028
1029 // check if state machine should change state
1030 // first, check if port was reinitialized
1031 if (port->sm_vars & AD_PORT_BEGIN)
1032 /* next state */
1033 port->sm_rx_state = AD_RX_INITIALIZE;
1034 // check if port is not enabled
1035 else if (!(port->sm_vars & AD_PORT_BEGIN)
1036 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1037 /* next state */
1038 port->sm_rx_state = AD_RX_PORT_DISABLED;
1039 // check if new lacpdu arrived
1040 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1041 port->sm_rx_timer_counter = 0; // zero timer
1042 port->sm_rx_state = AD_RX_CURRENT;
1043 } else {
1044 // if timer is on, and if it is expired
1045 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1046 switch (port->sm_rx_state) {
1047 case AD_RX_EXPIRED:
1048 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1049 break;
1050 case AD_RX_CURRENT:
1051 port->sm_rx_state = AD_RX_EXPIRED; // next state
1052 break;
1053 default: //to silence the compiler
1054 break;
1055 }
1056 } else {
1057 // if no lacpdu arrived and no timer is on
1058 switch (port->sm_rx_state) {
1059 case AD_RX_PORT_DISABLED:
1060 if (port->sm_vars & AD_PORT_MOVED)
1061 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1062 else if (port->is_enabled
1063 && (port->sm_vars
1064 & AD_PORT_LACP_ENABLED))
1065 port->sm_rx_state = AD_RX_EXPIRED; // next state
1066 else if (port->is_enabled
1067 && ((port->sm_vars
1068 & AD_PORT_LACP_ENABLED) == 0))
1069 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1070 break;
1071 default: //to silence the compiler
1072 break;
1073
1074 }
1075 }
1076 }
1077
1078 // check if the State machine was changed or new lacpdu arrived
1079 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1080 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1081 port->actor_port_number, last_state,
1082 port->sm_rx_state);
1083 switch (port->sm_rx_state) {
1084 case AD_RX_INITIALIZE:
1085 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1086 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1087 else
1088 port->sm_vars |= AD_PORT_LACP_ENABLED;
1089 port->sm_vars &= ~AD_PORT_SELECTED;
1090 __record_default(port);
1091 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1092 port->sm_vars &= ~AD_PORT_MOVED;
1093 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1094
1095 /*- Fall Through -*/
1096
1097 case AD_RX_PORT_DISABLED:
1098 port->sm_vars &= ~AD_PORT_MATCHED;
1099 break;
1100 case AD_RX_LACP_DISABLED:
1101 port->sm_vars &= ~AD_PORT_SELECTED;
1102 __record_default(port);
1103 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1104 port->sm_vars |= AD_PORT_MATCHED;
1105 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1106 break;
1107 case AD_RX_EXPIRED:
1108 //Reset of the Synchronization flag. (Standard 43.4.12)
1109 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1110 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1111 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1112 port->sm_vars &= ~AD_PORT_MATCHED;
1113 port->partner_oper.port_state |=
1114 AD_STATE_LACP_ACTIVITY;
1115 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1116 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1117 break;
1118 case AD_RX_DEFAULTED:
1119 __update_default_selected(port);
1120 __record_default(port);
1121 port->sm_vars |= AD_PORT_MATCHED;
1122 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1123 break;
1124 case AD_RX_CURRENT:
1125 // detect loopback situation
1126 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1127 // INFO_RECEIVED_LOOPBACK_FRAMES
1128 pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
1129 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1130 port->slave->dev->master->name, port->slave->dev->name);
1131 return;
1132 }
1133 __update_selected(lacpdu, port);
1134 __update_ntt(lacpdu, port);
1135 __record_pdu(lacpdu, port);
1136 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1137 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1138 // verify that if the aggregator is enabled, the port is enabled too.
1139 //(because if the link goes down for a short time, the 802.3ad will not
1140 // catch it, and the port will continue to be disabled)
1141 if (port->aggregator
1142 && port->aggregator->is_active
1143 && !__port_is_enabled(port))
1144 __enable_port(port);
1145 break;
1146 default: //to silence the compiler
1147 break;
1148 }
1149 }
1150}
1151
1152/**
1153 * ad_tx_machine - handle a port's tx state machine
1154 * @port: the port we're looking at
1155 *
1156 */
1157static void ad_tx_machine(struct port *port)
1158{
1159 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1160 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1161 // check if there is something to send
1162 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1163 __update_lacpdu_from_port(port);
1164
1165 if (ad_lacpdu_send(port) >= 0) {
1166 pr_debug("Sent LACPDU on port %d\n",
1167 port->actor_port_number);
1168
1169 /* mark ntt as false, so it will not be sent again until
1170 demanded */
1171 port->ntt = false;
1172 }
1173 }
1174 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1175 port->sm_tx_timer_counter =
1176 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1177 }
1178}
1179
1180/**
1181 * ad_periodic_machine - handle a port's periodic state machine
1182 * @port: the port we're looking at
1183 *
1184 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1185 */
1186static void ad_periodic_machine(struct port *port)
1187{
1188 periodic_states_t last_state;
1189
1190 // keep current state machine state to compare later if it was changed
1191 last_state = port->sm_periodic_state;
1192
1193 // check if port was reinitialized
1194 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1195 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1196 ) {
1197 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1198 }
1199 // check if state machine should change state
1200 else if (port->sm_periodic_timer_counter) {
1201 // check if periodic state machine expired
1202 if (!(--port->sm_periodic_timer_counter)) {
1203 // if expired then do tx
1204 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1205 } else {
1206 // If not expired, check if there is some new timeout parameter from the partner state
1207 switch (port->sm_periodic_state) {
1208 case AD_FAST_PERIODIC:
1209 if (!(port->partner_oper.port_state
1210 & AD_STATE_LACP_TIMEOUT))
1211 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1212 break;
1213 case AD_SLOW_PERIODIC:
1214 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1215 // stop current timer
1216 port->sm_periodic_timer_counter = 0;
1217 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1218 }
1219 break;
1220 default: //to silence the compiler
1221 break;
1222 }
1223 }
1224 } else {
1225 switch (port->sm_periodic_state) {
1226 case AD_NO_PERIODIC:
1227 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1228 break;
1229 case AD_PERIODIC_TX:
1230 if (!(port->partner_oper.port_state
1231 & AD_STATE_LACP_TIMEOUT))
1232 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1233 else
1234 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1235 break;
1236 default: //to silence the compiler
1237 break;
1238 }
1239 }
1240
1241 // check if the state machine was changed
1242 if (port->sm_periodic_state != last_state) {
1243 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1244 port->actor_port_number, last_state,
1245 port->sm_periodic_state);
1246 switch (port->sm_periodic_state) {
1247 case AD_NO_PERIODIC:
1248 port->sm_periodic_timer_counter = 0; // zero timer
1249 break;
1250 case AD_FAST_PERIODIC:
1251 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1252 break;
1253 case AD_SLOW_PERIODIC:
1254 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1255 break;
1256 case AD_PERIODIC_TX:
1257 port->ntt = true;
1258 break;
1259 default: //to silence the compiler
1260 break;
1261 }
1262 }
1263}
1264
1265/**
1266 * ad_port_selection_logic - select aggregation groups
1267 * @port: the port we're looking at
1268 *
1269 * Select aggregation groups, and assign each port for it's aggregetor. The
1270 * selection logic is called in the inititalization (after all the handshkes),
1271 * and after every lacpdu receive (if selected is off).
1272 */
1273static void ad_port_selection_logic(struct port *port)
1274{
1275 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1276 struct port *last_port = NULL, *curr_port;
1277 int found = 0;
1278
1279 // if the port is already Selected, do nothing
1280 if (port->sm_vars & AD_PORT_SELECTED)
1281 return;
1282
1283 // if the port is connected to other aggregator, detach it
1284 if (port->aggregator) {
1285 // detach the port from its former aggregator
1286 temp_aggregator = port->aggregator;
1287 for (curr_port = temp_aggregator->lag_ports; curr_port;
1288 last_port = curr_port,
1289 curr_port = curr_port->next_port_in_aggregator) {
1290 if (curr_port == port) {
1291 temp_aggregator->num_of_ports--;
1292 if (!last_port) {// if it is the first port attached to the aggregator
1293 temp_aggregator->lag_ports =
1294 port->next_port_in_aggregator;
1295 } else {// not the first port attached to the aggregator
1296 last_port->next_port_in_aggregator =
1297 port->next_port_in_aggregator;
1298 }
1299
1300 // clear the port's relations to this aggregator
1301 port->aggregator = NULL;
1302 port->next_port_in_aggregator = NULL;
1303 port->actor_port_aggregator_identifier = 0;
1304
1305 pr_debug("Port %d left LAG %d\n",
1306 port->actor_port_number,
1307 temp_aggregator->aggregator_identifier);
1308 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1309 if (!temp_aggregator->lag_ports)
1310 ad_clear_agg(temp_aggregator);
1311 break;
1312 }
1313 }
1314 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
1315 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1316 port->slave->dev->master->name,
1317 port->actor_port_number,
1318 port->slave->dev->name,
1319 port->aggregator->aggregator_identifier);
1320 }
1321 }
1322 // search on all aggregators for a suitable aggregator for this port
1323 for (aggregator = __get_first_agg(port); aggregator;
1324 aggregator = __get_next_agg(aggregator)) {
1325
1326 // keep a free aggregator for later use(if needed)
1327 if (!aggregator->lag_ports) {
1328 if (!free_aggregator)
1329 free_aggregator = aggregator;
1330 continue;
1331 }
1332 // check if current aggregator suits us
1333 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1334 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1335 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1336 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1337 ) &&
1338 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1339 !aggregator->is_individual) // but is not individual OR
1340 )
1341 ) {
1342 // attach to the founded aggregator
1343 port->aggregator = aggregator;
1344 port->actor_port_aggregator_identifier =
1345 port->aggregator->aggregator_identifier;
1346 port->next_port_in_aggregator = aggregator->lag_ports;
1347 port->aggregator->num_of_ports++;
1348 aggregator->lag_ports = port;
1349 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1350 port->actor_port_number,
1351 port->aggregator->aggregator_identifier);
1352
1353 // mark this port as selected
1354 port->sm_vars |= AD_PORT_SELECTED;
1355 found = 1;
1356 break;
1357 }
1358 }
1359
1360 // the port couldn't find an aggregator - attach it to a new aggregator
1361 if (!found) {
1362 if (free_aggregator) {
1363 // assign port a new aggregator
1364 port->aggregator = free_aggregator;
1365 port->actor_port_aggregator_identifier =
1366 port->aggregator->aggregator_identifier;
1367
1368 // update the new aggregator's parameters
1369 // if port was responsed from the end-user
1370 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1371 /* if port is full duplex */
1372 port->aggregator->is_individual = false;
1373 else
1374 port->aggregator->is_individual = true;
1375
1376 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1377 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1378 port->aggregator->partner_system =
1379 port->partner_oper.system;
1380 port->aggregator->partner_system_priority =
1381 port->partner_oper.system_priority;
1382 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1383 port->aggregator->receive_state = 1;
1384 port->aggregator->transmit_state = 1;
1385 port->aggregator->lag_ports = port;
1386 port->aggregator->num_of_ports++;
1387
1388 // mark this port as selected
1389 port->sm_vars |= AD_PORT_SELECTED;
1390
1391 pr_debug("Port %d joined LAG %d(new LAG)\n",
1392 port->actor_port_number,
1393 port->aggregator->aggregator_identifier);
1394 } else {
1395 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
1396 port->slave->dev->master->name,
1397 port->actor_port_number, port->slave->dev->name);
1398 }
1399 }
1400 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1401 // else set ready=FALSE in all aggregator's ports
1402 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1403
1404 aggregator = __get_first_agg(port);
1405 ad_agg_selection_logic(aggregator);
1406}
1407
1408/*
1409 * Decide if "agg" is a better choice for the new active aggregator that
1410 * the current best, according to the ad_select policy.
1411 */
1412static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1413 struct aggregator *curr)
1414{
1415 /*
1416 * 0. If no best, select current.
1417 *
1418 * 1. If the current agg is not individual, and the best is
1419 * individual, select current.
1420 *
1421 * 2. If current agg is individual and the best is not, keep best.
1422 *
1423 * 3. Therefore, current and best are both individual or both not
1424 * individual, so:
1425 *
1426 * 3a. If current agg partner replied, and best agg partner did not,
1427 * select current.
1428 *
1429 * 3b. If current agg partner did not reply and best agg partner
1430 * did reply, keep best.
1431 *
1432 * 4. Therefore, current and best both have partner replies or
1433 * both do not, so perform selection policy:
1434 *
1435 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1436 * select by bandwidth.
1437 *
1438 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1439 */
1440 if (!best)
1441 return curr;
1442
1443 if (!curr->is_individual && best->is_individual)
1444 return curr;
1445
1446 if (curr->is_individual && !best->is_individual)
1447 return best;
1448
1449 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1450 return curr;
1451
1452 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1453 return best;
1454
1455 switch (__get_agg_selection_mode(curr->lag_ports)) {
1456 case BOND_AD_COUNT:
1457 if (curr->num_of_ports > best->num_of_ports)
1458 return curr;
1459
1460 if (curr->num_of_ports < best->num_of_ports)
1461 return best;
1462
1463 /*FALLTHROUGH*/
1464 case BOND_AD_STABLE:
1465 case BOND_AD_BANDWIDTH:
1466 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1467 return curr;
1468
1469 break;
1470
1471 default:
1472 pr_warning("%s: Impossible agg select mode %d\n",
1473 curr->slave->dev->master->name,
1474 __get_agg_selection_mode(curr->lag_ports));
1475 break;
1476 }
1477
1478 return best;
1479}
1480
1481static int agg_device_up(const struct aggregator *agg)
1482{
1483 struct port *port = agg->lag_ports;
1484 if (!port)
1485 return 0;
1486 return (netif_running(port->slave->dev) &&
1487 netif_carrier_ok(port->slave->dev));
1488}
1489
1490/**
1491 * ad_agg_selection_logic - select an aggregation group for a team
1492 * @aggregator: the aggregator we're looking at
1493 *
1494 * It is assumed that only one aggregator may be selected for a team.
1495 *
1496 * The logic of this function is to select the aggregator according to
1497 * the ad_select policy:
1498 *
1499 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1500 * it, and to reselect the active aggregator only if the previous
1501 * aggregator has no more ports related to it.
1502 *
1503 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1504 * bandwidth, and reselect whenever a link state change takes place or the
1505 * set of slaves in the bond changes.
1506 *
1507 * BOND_AD_COUNT: select the aggregator with largest number of ports
1508 * (slaves), and reselect whenever a link state change takes place or the
1509 * set of slaves in the bond changes.
1510 *
1511 * FIXME: this function MUST be called with the first agg in the bond, or
1512 * __get_active_agg() won't work correctly. This function should be better
1513 * called with the bond itself, and retrieve the first agg from it.
1514 */
1515static void ad_agg_selection_logic(struct aggregator *agg)
1516{
1517 struct aggregator *best, *active, *origin;
1518 struct port *port;
1519
1520 origin = agg;
1521 active = __get_active_agg(agg);
1522 best = (active && agg_device_up(active)) ? active : NULL;
1523
1524 do {
1525 agg->is_active = 0;
1526
1527 if (agg->num_of_ports && agg_device_up(agg))
1528 best = ad_agg_selection_test(best, agg);
1529
1530 } while ((agg = __get_next_agg(agg)));
1531
1532 if (best &&
1533 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1534 /*
1535 * For the STABLE policy, don't replace the old active
1536 * aggregator if it's still active (it has an answering
1537 * partner) or if both the best and active don't have an
1538 * answering partner.
1539 */
1540 if (active && active->lag_ports &&
1541 active->lag_ports->is_enabled &&
1542 (__agg_has_partner(active) ||
1543 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1544 if (!(!active->actor_oper_aggregator_key &&
1545 best->actor_oper_aggregator_key)) {
1546 best = NULL;
1547 active->is_active = 1;
1548 }
1549 }
1550 }
1551
1552 if (best && (best == active)) {
1553 best = NULL;
1554 active->is_active = 1;
1555 }
1556
1557 // if there is new best aggregator, activate it
1558 if (best) {
1559 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1560 best->aggregator_identifier, best->num_of_ports,
1561 best->actor_oper_aggregator_key,
1562 best->partner_oper_aggregator_key,
1563 best->is_individual, best->is_active);
1564 pr_debug("best ports %p slave %p %s\n",
1565 best->lag_ports, best->slave,
1566 best->slave ? best->slave->dev->name : "NULL");
1567
1568 for (agg = __get_first_agg(best->lag_ports); agg;
1569 agg = __get_next_agg(agg)) {
1570
1571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1572 agg->aggregator_identifier, agg->num_of_ports,
1573 agg->actor_oper_aggregator_key,
1574 agg->partner_oper_aggregator_key,
1575 agg->is_individual, agg->is_active);
1576 }
1577
1578 // check if any partner replys
1579 if (best->is_individual) {
1580 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1581 best->slave ? best->slave->dev->master->name : "NULL");
1582 }
1583
1584 best->is_active = 1;
1585 pr_debug("LAG %d chosen as the active LAG\n",
1586 best->aggregator_identifier);
1587 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1588 best->aggregator_identifier, best->num_of_ports,
1589 best->actor_oper_aggregator_key,
1590 best->partner_oper_aggregator_key,
1591 best->is_individual, best->is_active);
1592
1593 // disable the ports that were related to the former active_aggregator
1594 if (active) {
1595 for (port = active->lag_ports; port;
1596 port = port->next_port_in_aggregator) {
1597 __disable_port(port);
1598 }
1599 }
1600 }
1601
1602 /*
1603 * if the selected aggregator is of join individuals
1604 * (partner_system is NULL), enable their ports
1605 */
1606 active = __get_active_agg(origin);
1607
1608 if (active) {
1609 if (!__agg_has_partner(active)) {
1610 for (port = active->lag_ports; port;
1611 port = port->next_port_in_aggregator) {
1612 __enable_port(port);
1613 }
1614 }
1615 }
1616
1617 if (origin->slave) {
1618 struct bonding *bond;
1619
1620 bond = bond_get_bond_by_slave(origin->slave);
1621 if (bond)
1622 bond_3ad_set_carrier(bond);
1623 }
1624}
1625
1626/**
1627 * ad_clear_agg - clear a given aggregator's parameters
1628 * @aggregator: the aggregator we're looking at
1629 *
1630 */
1631static void ad_clear_agg(struct aggregator *aggregator)
1632{
1633 if (aggregator) {
1634 aggregator->is_individual = false;
1635 aggregator->actor_admin_aggregator_key = 0;
1636 aggregator->actor_oper_aggregator_key = 0;
1637 aggregator->partner_system = null_mac_addr;
1638 aggregator->partner_system_priority = 0;
1639 aggregator->partner_oper_aggregator_key = 0;
1640 aggregator->receive_state = 0;
1641 aggregator->transmit_state = 0;
1642 aggregator->lag_ports = NULL;
1643 aggregator->is_active = 0;
1644 aggregator->num_of_ports = 0;
1645 pr_debug("LAG %d was cleared\n",
1646 aggregator->aggregator_identifier);
1647 }
1648}
1649
1650/**
1651 * ad_initialize_agg - initialize a given aggregator's parameters
1652 * @aggregator: the aggregator we're looking at
1653 *
1654 */
1655static void ad_initialize_agg(struct aggregator *aggregator)
1656{
1657 if (aggregator) {
1658 ad_clear_agg(aggregator);
1659
1660 aggregator->aggregator_mac_address = null_mac_addr;
1661 aggregator->aggregator_identifier = 0;
1662 aggregator->slave = NULL;
1663 }
1664}
1665
1666/**
1667 * ad_initialize_port - initialize a given port's parameters
1668 * @aggregator: the aggregator we're looking at
1669 * @lacp_fast: boolean. whether fast periodic should be used
1670 *
1671 */
1672static void ad_initialize_port(struct port *port, int lacp_fast)
1673{
1674 static const struct port_params tmpl = {
1675 .system_priority = 0xffff,
1676 .key = 1,
1677 .port_number = 1,
1678 .port_priority = 0xff,
1679 .port_state = 1,
1680 };
1681 static const struct lacpdu lacpdu = {
1682 .subtype = 0x01,
1683 .version_number = 0x01,
1684 .tlv_type_actor_info = 0x01,
1685 .actor_information_length = 0x14,
1686 .tlv_type_partner_info = 0x02,
1687 .partner_information_length = 0x14,
1688 .tlv_type_collector_info = 0x03,
1689 .collector_information_length = 0x10,
1690 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1691 };
1692
1693 if (port) {
1694 port->actor_port_number = 1;
1695 port->actor_port_priority = 0xff;
1696 port->actor_system = null_mac_addr;
1697 port->actor_system_priority = 0xffff;
1698 port->actor_port_aggregator_identifier = 0;
1699 port->ntt = false;
1700 port->actor_admin_port_key = 1;
1701 port->actor_oper_port_key = 1;
1702 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1703 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1704
1705 if (lacp_fast)
1706 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1707
1708 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1709 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1710
1711 port->is_enabled = true;
1712 // ****** private parameters ******
1713 port->sm_vars = 0x3;
1714 port->sm_rx_state = 0;
1715 port->sm_rx_timer_counter = 0;
1716 port->sm_periodic_state = 0;
1717 port->sm_periodic_timer_counter = 0;
1718 port->sm_mux_state = 0;
1719 port->sm_mux_timer_counter = 0;
1720 port->sm_tx_state = 0;
1721 port->sm_tx_timer_counter = 0;
1722 port->slave = NULL;
1723 port->aggregator = NULL;
1724 port->next_port_in_aggregator = NULL;
1725 port->transaction_id = 0;
1726
1727 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1728 }
1729}
1730
1731/**
1732 * ad_enable_collecting_distributing - enable a port's transmit/receive
1733 * @port: the port we're looking at
1734 *
1735 * Enable @port if it's in an active aggregator
1736 */
1737static void ad_enable_collecting_distributing(struct port *port)
1738{
1739 if (port->aggregator->is_active) {
1740 pr_debug("Enabling port %d(LAG %d)\n",
1741 port->actor_port_number,
1742 port->aggregator->aggregator_identifier);
1743 __enable_port(port);
1744 }
1745}
1746
1747/**
1748 * ad_disable_collecting_distributing - disable a port's transmit/receive
1749 * @port: the port we're looking at
1750 *
1751 */
1752static void ad_disable_collecting_distributing(struct port *port)
1753{
1754 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
1755 pr_debug("Disabling port %d(LAG %d)\n",
1756 port->actor_port_number,
1757 port->aggregator->aggregator_identifier);
1758 __disable_port(port);
1759 }
1760}
1761
1762#if 0
1763/**
1764 * ad_marker_info_send - send a marker information frame
1765 * @port: the port we're looking at
1766 *
1767 * This function does nothing since we decided not to implement send and handle
1768 * response for marker PDU's, in this stage, but only to respond to marker
1769 * information.
1770 */
1771static void ad_marker_info_send(struct port *port)
1772{
1773 struct bond_marker marker;
1774 u16 index;
1775
1776 // fill the marker PDU with the appropriate values
1777 marker.subtype = 0x02;
1778 marker.version_number = 0x01;
1779 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1780 marker.marker_length = 0x16;
1781 // convert requester_port to Big Endian
1782 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1783 marker.requester_system = port->actor_system;
1784 // convert requester_port(u32) to Big Endian
1785 marker.requester_transaction_id =
1786 (((++port->transaction_id & 0xFF) << 24)
1787 | ((port->transaction_id & 0xFF00) << 8)
1788 | ((port->transaction_id & 0xFF0000) >> 8)
1789 | ((port->transaction_id & 0xFF000000) >> 24));
1790 marker.pad = 0;
1791 marker.tlv_type_terminator = 0x00;
1792 marker.terminator_length = 0x00;
1793 for (index = 0; index < 90; index++)
1794 marker.reserved_90[index] = 0;
1795
1796 // send the marker information
1797 if (ad_marker_send(port, &marker) >= 0) {
1798 pr_debug("Sent Marker Information on port %d\n",
1799 port->actor_port_number);
1800 }
1801}
1802#endif
1803
1804/**
1805 * ad_marker_info_received - handle receive of a Marker information frame
1806 * @marker_info: Marker info received
1807 * @port: the port we're looking at
1808 *
1809 */
1810static void ad_marker_info_received(struct bond_marker *marker_info,
1811 struct port *port)
1812{
1813 struct bond_marker marker;
1814
1815 // copy the received marker data to the response marker
1816 //marker = *marker_info;
1817 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1818 // change the marker subtype to marker response
1819 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1820 // send the marker response
1821
1822 if (ad_marker_send(port, &marker) >= 0) {
1823 pr_debug("Sent Marker Response on port %d\n",
1824 port->actor_port_number);
1825 }
1826}
1827
1828/**
1829 * ad_marker_response_received - handle receive of a marker response frame
1830 * @marker: marker PDU received
1831 * @port: the port we're looking at
1832 *
1833 * This function does nothing since we decided not to implement send and handle
1834 * response for marker PDU's, in this stage, but only to respond to marker
1835 * information.
1836 */
1837static void ad_marker_response_received(struct bond_marker *marker,
1838 struct port *port)
1839{
1840 marker = NULL; /* just to satisfy the compiler */
1841 port = NULL; /* just to satisfy the compiler */
1842 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1843}
1844
1845//////////////////////////////////////////////////////////////////////////////////////
1846// ================= AD exported functions to the main bonding code ==================
1847//////////////////////////////////////////////////////////////////////////////////////
1848
1849// Check aggregators status in team every T seconds
1850#define AD_AGGREGATOR_SELECTION_TIMER 8
1851
1852/*
1853 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1854 *
1855 * Set the aggregation selection timer, to initiate an agg selection in
1856 * the very near future. Called during first initialization, and during
1857 * any down to up transitions of the bond.
1858 */
1859void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1860{
1861 BOND_AD_INFO(bond).agg_select_timer = timeout;
1862}
1863
1864static u16 aggregator_identifier;
1865
1866/**
1867 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1868 * @bond: bonding struct to work on
1869 * @tick_resolution: tick duration (millisecond resolution)
1870 *
1871 * Can be called only after the mac address of the bond is set.
1872 */
1873void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1874{
1875 // check that the bond is not initialized yet
1876 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1877 bond->dev->dev_addr)) {
1878
1879 aggregator_identifier = 0;
1880
1881 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1882 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1883
1884 // initialize how many times this module is called in one second(should be about every 100ms)
1885 ad_ticks_per_sec = tick_resolution;
1886
1887 bond_3ad_initiate_agg_selection(bond,
1888 AD_AGGREGATOR_SELECTION_TIMER *
1889 ad_ticks_per_sec);
1890 }
1891}
1892
1893/**
1894 * bond_3ad_bind_slave - initialize a slave's port
1895 * @slave: slave struct to work on
1896 *
1897 * Returns: 0 on success
1898 * < 0 on error
1899 */
1900int bond_3ad_bind_slave(struct slave *slave)
1901{
1902 struct bonding *bond = bond_get_bond_by_slave(slave);
1903 struct port *port;
1904 struct aggregator *aggregator;
1905
1906 if (bond == NULL) {
1907 pr_err("%s: The slave %s is not attached to its bond\n",
1908 slave->dev->master->name, slave->dev->name);
1909 return -1;
1910 }
1911
1912 //check that the slave has not been initialized yet.
1913 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1914
1915 // port initialization
1916 port = &(SLAVE_AD_INFO(slave).port);
1917
1918 ad_initialize_port(port, bond->params.lacp_fast);
1919
1920 port->slave = slave;
1921 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1922 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1923 // ------------------------------------------------------------
1924 // Port key : | User key | Speed |Duplex|
1925 // ------------------------------------------------------------
1926 // 16 6 1 0
1927 port->actor_admin_port_key = 0; // initialize this parameter
1928 port->actor_admin_port_key |= __get_duplex(port);
1929 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1930 port->actor_oper_port_key = port->actor_admin_port_key;
1931 // if the port is not full duplex, then the port should be not lacp Enabled
1932 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1933 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1934 // actor system is the bond's system
1935 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1936 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1937 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1938 port->aggregator = NULL;
1939 port->next_port_in_aggregator = NULL;
1940
1941 __disable_port(port);
1942 __initialize_port_locks(port);
1943
1944
1945 // aggregator initialization
1946 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1947
1948 ad_initialize_agg(aggregator);
1949
1950 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1951 aggregator->aggregator_identifier = (++aggregator_identifier);
1952 aggregator->slave = slave;
1953 aggregator->is_active = 0;
1954 aggregator->num_of_ports = 0;
1955 }
1956
1957 return 0;
1958}
1959
1960/**
1961 * bond_3ad_unbind_slave - deinitialize a slave's port
1962 * @slave: slave struct to work on
1963 *
1964 * Search for the aggregator that is related to this port, remove the
1965 * aggregator and assign another aggregator for other port related to it
1966 * (if any), and remove the port.
1967 */
1968void bond_3ad_unbind_slave(struct slave *slave)
1969{
1970 struct port *port, *prev_port, *temp_port;
1971 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1972 int select_new_active_agg = 0;
1973
1974 // find the aggregator related to this slave
1975 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1976
1977 // find the port related to this slave
1978 port = &(SLAVE_AD_INFO(slave).port);
1979
1980 // if slave is null, the whole port is not initialized
1981 if (!port->slave) {
1982 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
1983 slave->dev->master->name, slave->dev->name);
1984 return;
1985 }
1986
1987 pr_debug("Unbinding Link Aggregation Group %d\n",
1988 aggregator->aggregator_identifier);
1989
1990 /* Tell the partner that this port is not suitable for aggregation */
1991 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1992 __update_lacpdu_from_port(port);
1993 ad_lacpdu_send(port);
1994
1995 // check if this aggregator is occupied
1996 if (aggregator->lag_ports) {
1997 // check if there are other ports related to this aggregator except
1998 // the port related to this slave(thats ensure us that there is a
1999 // reason to search for new aggregator, and that we will find one
2000 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2001 // find new aggregator for the related port(s)
2002 new_aggregator = __get_first_agg(port);
2003 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
2004 // if the new aggregator is empty, or it is connected to our port only
2005 if (!new_aggregator->lag_ports
2006 || ((new_aggregator->lag_ports == port)
2007 && !new_aggregator->lag_ports->next_port_in_aggregator))
2008 break;
2009 }
2010 // if new aggregator found, copy the aggregator's parameters
2011 // and connect the related lag_ports to the new aggregator
2012 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2013 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
2014 aggregator->aggregator_identifier,
2015 new_aggregator->aggregator_identifier);
2016
2017 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
2018 pr_info("%s: Removing an active aggregator\n",
2019 aggregator->slave->dev->master->name);
2020 // select new active aggregator
2021 select_new_active_agg = 1;
2022 }
2023
2024 new_aggregator->is_individual = aggregator->is_individual;
2025 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2026 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2027 new_aggregator->partner_system = aggregator->partner_system;
2028 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2029 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2030 new_aggregator->receive_state = aggregator->receive_state;
2031 new_aggregator->transmit_state = aggregator->transmit_state;
2032 new_aggregator->lag_ports = aggregator->lag_ports;
2033 new_aggregator->is_active = aggregator->is_active;
2034 new_aggregator->num_of_ports = aggregator->num_of_ports;
2035
2036 // update the information that is written on the ports about the aggregator
2037 for (temp_port = aggregator->lag_ports; temp_port;
2038 temp_port = temp_port->next_port_in_aggregator) {
2039 temp_port->aggregator = new_aggregator;
2040 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2041 }
2042
2043 // clear the aggregator
2044 ad_clear_agg(aggregator);
2045
2046 if (select_new_active_agg)
2047 ad_agg_selection_logic(__get_first_agg(port));
2048 } else {
2049 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
2050 slave->dev->master->name);
2051 }
2052 } else { // in case that the only port related to this aggregator is the one we want to remove
2053 select_new_active_agg = aggregator->is_active;
2054 // clear the aggregator
2055 ad_clear_agg(aggregator);
2056 if (select_new_active_agg) {
2057 pr_info("%s: Removing an active aggregator\n",
2058 slave->dev->master->name);
2059 // select new active aggregator
2060 ad_agg_selection_logic(__get_first_agg(port));
2061 }
2062 }
2063 }
2064
2065 pr_debug("Unbinding port %d\n", port->actor_port_number);
2066 // find the aggregator that this port is connected to
2067 temp_aggregator = __get_first_agg(port);
2068 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2069 prev_port = NULL;
2070 // search the port in the aggregator's related ports
2071 for (temp_port = temp_aggregator->lag_ports; temp_port;
2072 prev_port = temp_port,
2073 temp_port = temp_port->next_port_in_aggregator) {
2074 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
2075 if (prev_port)
2076 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2077 else
2078 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2079 temp_aggregator->num_of_ports--;
2080 if (temp_aggregator->num_of_ports == 0) {
2081 select_new_active_agg = temp_aggregator->is_active;
2082 // clear the aggregator
2083 ad_clear_agg(temp_aggregator);
2084 if (select_new_active_agg) {
2085 pr_info("%s: Removing an active aggregator\n",
2086 slave->dev->master->name);
2087 // select new active aggregator
2088 ad_agg_selection_logic(__get_first_agg(port));
2089 }
2090 }
2091 break;
2092 }
2093 }
2094 }
2095 port->slave = NULL;
2096}
2097
2098/**
2099 * bond_3ad_state_machine_handler - handle state machines timeout
2100 * @bond: bonding struct to work on
2101 *
2102 * The state machine handling concept in this module is to check every tick
2103 * which state machine should operate any function. The execution order is
2104 * round robin, so when we have an interaction between state machines, the
2105 * reply of one to each other might be delayed until next tick.
2106 *
2107 * This function also complete the initialization when the agg_select_timer
2108 * times out, and it selects an aggregator for the ports that are yet not
2109 * related to any aggregator, and selects the active aggregator for a bond.
2110 */
2111void bond_3ad_state_machine_handler(struct work_struct *work)
2112{
2113 struct bonding *bond = container_of(work, struct bonding,
2114 ad_work.work);
2115 struct port *port;
2116 struct aggregator *aggregator;
2117
2118 read_lock(&bond->lock);
2119
2120 if (bond->kill_timers)
2121 goto out;
2122
2123 //check if there are any slaves
2124 if (bond->slave_cnt == 0)
2125 goto re_arm;
2126
2127 // check if agg_select_timer timer after initialize is timed out
2128 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2129 // select the active aggregator for the bond
2130 if ((port = __get_first_port(bond))) {
2131 if (!port->slave) {
2132 pr_warning("%s: Warning: bond's first port is uninitialized\n",
2133 bond->dev->name);
2134 goto re_arm;
2135 }
2136
2137 aggregator = __get_first_agg(port);
2138 ad_agg_selection_logic(aggregator);
2139 }
2140 bond_3ad_set_carrier(bond);
2141 }
2142
2143 // for each port run the state machines
2144 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2145 if (!port->slave) {
2146 pr_warning("%s: Warning: Found an uninitialized port\n",
2147 bond->dev->name);
2148 goto re_arm;
2149 }
2150
2151 /* Lock around state machines to protect data accessed
2152 * by all (e.g., port->sm_vars). ad_rx_machine may run
2153 * concurrently due to incoming LACPDU.
2154 */
2155 __get_state_machine_lock(port);
2156
2157 ad_rx_machine(NULL, port);
2158 ad_periodic_machine(port);
2159 ad_port_selection_logic(port);
2160 ad_mux_machine(port);
2161 ad_tx_machine(port);
2162
2163 // turn off the BEGIN bit, since we already handled it
2164 if (port->sm_vars & AD_PORT_BEGIN)
2165 port->sm_vars &= ~AD_PORT_BEGIN;
2166
2167 __release_state_machine_lock(port);
2168 }
2169
2170re_arm:
2171 if (!bond->kill_timers)
2172 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2173out:
2174 read_unlock(&bond->lock);
2175}
2176
2177/**
2178 * bond_3ad_rx_indication - handle a received frame
2179 * @lacpdu: received lacpdu
2180 * @slave: slave struct to work on
2181 * @length: length of the data received
2182 *
2183 * It is assumed that frames that were sent on this NIC don't returned as new
2184 * received frames (loopback). Since only the payload is given to this
2185 * function, it check for loopback.
2186 */
2187static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2188{
2189 struct port *port;
2190
2191 if (length >= sizeof(struct lacpdu)) {
2192
2193 port = &(SLAVE_AD_INFO(slave).port);
2194
2195 if (!port->slave) {
2196 pr_warning("%s: Warning: port of slave %s is uninitialized\n",
2197 slave->dev->name, slave->dev->master->name);
2198 return;
2199 }
2200
2201 switch (lacpdu->subtype) {
2202 case AD_TYPE_LACPDU:
2203 pr_debug("Received LACPDU on port %d\n",
2204 port->actor_port_number);
2205 /* Protect against concurrent state machines */
2206 __get_state_machine_lock(port);
2207 ad_rx_machine(lacpdu, port);
2208 __release_state_machine_lock(port);
2209 break;
2210
2211 case AD_TYPE_MARKER:
2212 // No need to convert fields to Little Endian since we don't use the marker's fields.
2213
2214 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2215 case AD_MARKER_INFORMATION_SUBTYPE:
2216 pr_debug("Received Marker Information on port %d\n",
2217 port->actor_port_number);
2218 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2219 break;
2220
2221 case AD_MARKER_RESPONSE_SUBTYPE:
2222 pr_debug("Received Marker Response on port %d\n",
2223 port->actor_port_number);
2224 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2225 break;
2226
2227 default:
2228 pr_debug("Received an unknown Marker subtype on slot %d\n",
2229 port->actor_port_number);
2230 }
2231 }
2232 }
2233}
2234
2235/**
2236 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2237 * @slave: slave struct to work on
2238 *
2239 * Handle reselection of aggregator (if needed) for this port.
2240 */
2241void bond_3ad_adapter_speed_changed(struct slave *slave)
2242{
2243 struct port *port;
2244
2245 port = &(SLAVE_AD_INFO(slave).port);
2246
2247 // if slave is null, the whole port is not initialized
2248 if (!port->slave) {
2249 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
2250 slave->dev->master->name, slave->dev->name);
2251 return;
2252 }
2253
2254 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2255 port->actor_oper_port_key = port->actor_admin_port_key |=
2256 (__get_link_speed(port) << 1);
2257 pr_debug("Port %d changed speed\n", port->actor_port_number);
2258 // there is no need to reselect a new aggregator, just signal the
2259 // state machines to reinitialize
2260 port->sm_vars |= AD_PORT_BEGIN;
2261}
2262
2263/**
2264 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2265 * @slave: slave struct to work on
2266 *
2267 * Handle reselection of aggregator (if needed) for this port.
2268 */
2269void bond_3ad_adapter_duplex_changed(struct slave *slave)
2270{
2271 struct port *port;
2272
2273 port = &(SLAVE_AD_INFO(slave).port);
2274
2275 // if slave is null, the whole port is not initialized
2276 if (!port->slave) {
2277 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
2278 slave->dev->master->name, slave->dev->name);
2279 return;
2280 }
2281
2282 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2283 port->actor_oper_port_key = port->actor_admin_port_key |=
2284 __get_duplex(port);
2285 pr_debug("Port %d changed duplex\n", port->actor_port_number);
2286 // there is no need to reselect a new aggregator, just signal the
2287 // state machines to reinitialize
2288 port->sm_vars |= AD_PORT_BEGIN;
2289}
2290
2291/**
2292 * bond_3ad_handle_link_change - handle a slave's link status change indication
2293 * @slave: slave struct to work on
2294 * @status: whether the link is now up or down
2295 *
2296 * Handle reselection of aggregator (if needed) for this port.
2297 */
2298void bond_3ad_handle_link_change(struct slave *slave, char link)
2299{
2300 struct port *port;
2301
2302 port = &(SLAVE_AD_INFO(slave).port);
2303
2304 // if slave is null, the whole port is not initialized
2305 if (!port->slave) {
2306 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
2307 slave->dev->master->name, slave->dev->name);
2308 return;
2309 }
2310
2311 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
2312 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2313 if (link == BOND_LINK_UP) {
2314 port->is_enabled = true;
2315 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2316 port->actor_oper_port_key = port->actor_admin_port_key |=
2317 __get_duplex(port);
2318 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2319 port->actor_oper_port_key = port->actor_admin_port_key |=
2320 (__get_link_speed(port) << 1);
2321 } else {
2322 /* link has failed */
2323 port->is_enabled = false;
2324 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2325 port->actor_oper_port_key = (port->actor_admin_port_key &=
2326 ~AD_SPEED_KEY_BITS);
2327 }
2328 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2329 // there is no need to reselect a new aggregator, just signal the
2330 // state machines to reinitialize
2331 port->sm_vars |= AD_PORT_BEGIN;
2332}
2333
2334/*
2335 * set link state for bonding master: if we have an active
2336 * aggregator, we're up, if not, we're down. Presumes that we cannot
2337 * have an active aggregator if there are no slaves with link up.
2338 *
2339 * This behavior complies with IEEE 802.3 section 43.3.9.
2340 *
2341 * Called by bond_set_carrier(). Return zero if carrier state does not
2342 * change, nonzero if it does.
2343 */
2344int bond_3ad_set_carrier(struct bonding *bond)
2345{
2346 struct aggregator *active;
2347
2348 active = __get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator));
2349 if (active) {
2350 /* are enough slaves available to consider link up? */
2351 if (active->num_of_ports < bond->params.min_links) {
2352 if (netif_carrier_ok(bond->dev)) {
2353 netif_carrier_off(bond->dev);
2354 return 1;
2355 }
2356 } else if (!netif_carrier_ok(bond->dev)) {
2357 netif_carrier_on(bond->dev);
2358 return 1;
2359 }
2360 return 0;
2361 }
2362
2363 if (netif_carrier_ok(bond->dev)) {
2364 netif_carrier_off(bond->dev);
2365 return 1;
2366 }
2367 return 0;
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, struct ad_info *ad_info)
2379{
2380 struct aggregator *aggregator = NULL;
2381 struct port *port;
2382
2383 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2384 if (port->aggregator && port->aggregator->is_active) {
2385 aggregator = port->aggregator;
2386 break;
2387 }
2388 }
2389
2390 if (aggregator) {
2391 ad_info->aggregator_id = aggregator->aggregator_identifier;
2392 ad_info->ports = aggregator->num_of_ports;
2393 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2394 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2395 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2396 return 0;
2397 }
2398
2399 return -1;
2400}
2401
2402int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2403{
2404 struct slave *slave, *start_at;
2405 struct bonding *bond = netdev_priv(dev);
2406 int slave_agg_no;
2407 int slaves_in_agg;
2408 int agg_id;
2409 int i;
2410 struct ad_info ad_info;
2411 int res = 1;
2412
2413 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
2414 pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n",
2415 dev->name);
2416 goto out;
2417 }
2418
2419 slaves_in_agg = ad_info.ports;
2420 agg_id = ad_info.aggregator_id;
2421
2422 if (slaves_in_agg == 0) {
2423 /*the aggregator is empty*/
2424 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
2425 goto out;
2426 }
2427
2428 slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
2429
2430 bond_for_each_slave(bond, slave, i) {
2431 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2432
2433 if (agg && (agg->aggregator_identifier == agg_id)) {
2434 slave_agg_no--;
2435 if (slave_agg_no < 0)
2436 break;
2437 }
2438 }
2439
2440 if (slave_agg_no >= 0) {
2441 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2442 dev->name, agg_id);
2443 goto out;
2444 }
2445
2446 start_at = slave;
2447
2448 bond_for_each_slave_from(bond, slave, i, start_at) {
2449 int slave_agg_id = 0;
2450 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2451
2452 if (agg)
2453 slave_agg_id = agg->aggregator_identifier;
2454
2455 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2456 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2457 break;
2458 }
2459 }
2460
2461out:
2462 if (res) {
2463 /* no suitable interface, frame not sent */
2464 dev_kfree_skb(skb);
2465 }
2466
2467 return NETDEV_TX_OK;
2468}
2469
2470void bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
2471 struct slave *slave)
2472{
2473 if (skb->protocol != PKT_TYPE_LACPDU)
2474 return;
2475
2476 if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
2477 return;
2478
2479 read_lock(&bond->lock);
2480 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
2481 read_unlock(&bond->lock);
2482}
2483
2484/*
2485 * When modify lacp_rate parameter via sysfs,
2486 * update actor_oper_port_state of each port.
2487 *
2488 * Hold slave->state_machine_lock,
2489 * so we can modify port->actor_oper_port_state,
2490 * no matter bond is up or down.
2491 */
2492void bond_3ad_update_lacp_rate(struct bonding *bond)
2493{
2494 int i;
2495 struct slave *slave;
2496 struct port *port = NULL;
2497 int lacp_fast;
2498
2499 read_lock(&bond->lock);
2500 lacp_fast = bond->params.lacp_fast;
2501
2502 bond_for_each_slave(bond, slave, i) {
2503 port = &(SLAVE_AD_INFO(slave).port);
2504 __get_state_machine_lock(port);
2505 if (lacp_fast)
2506 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2507 else
2508 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2509 __release_state_machine_lock(port);
2510 }
2511
2512 read_unlock(&bond->lock);
2513}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 */
5
6#include <linux/skbuff.h>
7#include <linux/if_ether.h>
8#include <linux/netdevice.h>
9#include <linux/spinlock.h>
10#include <linux/ethtool.h>
11#include <linux/etherdevice.h>
12#include <linux/if_bonding.h>
13#include <linux/pkt_sched.h>
14#include <net/net_namespace.h>
15#include <net/bonding.h>
16#include <net/bond_3ad.h>
17#include <net/netlink.h>
18
19/* General definitions */
20#define AD_SHORT_TIMEOUT 1
21#define AD_LONG_TIMEOUT 0
22#define AD_STANDBY 0x2
23#define AD_MAX_TX_IN_SECOND 3
24#define AD_COLLECTOR_MAX_DELAY 0
25
26/* Timer definitions (43.4.4 in the 802.3ad standard) */
27#define AD_FAST_PERIODIC_TIME 1
28#define AD_SLOW_PERIODIC_TIME 30
29#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
30#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
31#define AD_CHURN_DETECTION_TIME 60
32#define AD_AGGREGATE_WAIT_TIME 2
33
34/* Port Variables definitions used by the State Machines (43.4.7 in the
35 * 802.3ad standard)
36 */
37#define AD_PORT_BEGIN 0x1
38#define AD_PORT_LACP_ENABLED 0x2
39#define AD_PORT_ACTOR_CHURN 0x4
40#define AD_PORT_PARTNER_CHURN 0x8
41#define AD_PORT_READY 0x10
42#define AD_PORT_READY_N 0x20
43#define AD_PORT_MATCHED 0x40
44#define AD_PORT_STANDBY 0x80
45#define AD_PORT_SELECTED 0x100
46#define AD_PORT_MOVED 0x200
47#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
48
49/* Port Key definitions
50 * key is determined according to the link speed, duplex and
51 * user key (which is yet not supported)
52 * --------------------------------------------------------------
53 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
54 * --------------------------------------------------------------
55 * |15 6|5 1|0
56 */
57#define AD_DUPLEX_KEY_MASKS 0x1
58#define AD_SPEED_KEY_MASKS 0x3E
59#define AD_USER_KEY_MASKS 0xFFC0
60
61enum ad_link_speed_type {
62 AD_LINK_SPEED_1MBPS = 1,
63 AD_LINK_SPEED_10MBPS,
64 AD_LINK_SPEED_100MBPS,
65 AD_LINK_SPEED_1000MBPS,
66 AD_LINK_SPEED_2500MBPS,
67 AD_LINK_SPEED_5000MBPS,
68 AD_LINK_SPEED_10000MBPS,
69 AD_LINK_SPEED_14000MBPS,
70 AD_LINK_SPEED_20000MBPS,
71 AD_LINK_SPEED_25000MBPS,
72 AD_LINK_SPEED_40000MBPS,
73 AD_LINK_SPEED_50000MBPS,
74 AD_LINK_SPEED_56000MBPS,
75 AD_LINK_SPEED_100000MBPS,
76 AD_LINK_SPEED_200000MBPS,
77 AD_LINK_SPEED_400000MBPS,
78 AD_LINK_SPEED_800000MBPS,
79};
80
81/* compare MAC addresses */
82#define MAC_ADDRESS_EQUAL(A, B) \
83 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
84
85static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
86 0, 0, 0, 0, 0, 0
87};
88
89static const u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;
90static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
91
92const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = {
93 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02
94};
95
96/* ================= main 802.3ad protocol functions ================== */
97static int ad_lacpdu_send(struct port *port);
98static int ad_marker_send(struct port *port, struct bond_marker *marker);
99static void ad_mux_machine(struct port *port, bool *update_slave_arr);
100static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
101static void ad_tx_machine(struct port *port);
102static void ad_periodic_machine(struct port *port, struct bond_params *bond_params);
103static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
104static void ad_agg_selection_logic(struct aggregator *aggregator,
105 bool *update_slave_arr);
106static void ad_clear_agg(struct aggregator *aggregator);
107static void ad_initialize_agg(struct aggregator *aggregator);
108static void ad_initialize_port(struct port *port, int lacp_fast);
109static void ad_enable_collecting_distributing(struct port *port,
110 bool *update_slave_arr);
111static void ad_disable_collecting_distributing(struct port *port,
112 bool *update_slave_arr);
113static void ad_marker_info_received(struct bond_marker *marker_info,
114 struct port *port);
115static void ad_marker_response_received(struct bond_marker *marker,
116 struct port *port);
117static void ad_update_actor_keys(struct port *port, bool reset);
118
119
120/* ================= api to bonding and kernel code ================== */
121
122/**
123 * __get_bond_by_port - get the port's bonding struct
124 * @port: the port we're looking at
125 *
126 * Return @port's bonding struct, or %NULL if it can't be found.
127 */
128static inline struct bonding *__get_bond_by_port(struct port *port)
129{
130 if (port->slave == NULL)
131 return NULL;
132
133 return bond_get_bond_by_slave(port->slave);
134}
135
136/**
137 * __get_first_agg - get the first aggregator in the bond
138 * @port: the port we're looking at
139 *
140 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
141 * found.
142 * The caller must hold RCU or RTNL lock.
143 */
144static inline struct aggregator *__get_first_agg(struct port *port)
145{
146 struct bonding *bond = __get_bond_by_port(port);
147 struct slave *first_slave;
148 struct aggregator *agg;
149
150 /* If there's no bond for this port, or bond has no slaves */
151 if (bond == NULL)
152 return NULL;
153
154 rcu_read_lock();
155 first_slave = bond_first_slave_rcu(bond);
156 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
157 rcu_read_unlock();
158
159 return agg;
160}
161
162/**
163 * __agg_has_partner - see if we have a partner
164 * @agg: the agregator we're looking at
165 *
166 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
167 * address for the partner). Return 0 if not.
168 */
169static inline int __agg_has_partner(struct aggregator *agg)
170{
171 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
172}
173
174/**
175 * __disable_port - disable the port's slave
176 * @port: the port we're looking at
177 */
178static inline void __disable_port(struct port *port)
179{
180 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
181}
182
183/**
184 * __enable_port - enable the port's slave, if it's up
185 * @port: the port we're looking at
186 */
187static inline void __enable_port(struct port *port)
188{
189 struct slave *slave = port->slave;
190
191 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
192 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
193}
194
195/**
196 * __port_is_enabled - check if the port's slave is in active state
197 * @port: the port we're looking at
198 */
199static inline int __port_is_enabled(struct port *port)
200{
201 return bond_is_active_slave(port->slave);
202}
203
204/**
205 * __get_agg_selection_mode - get the aggregator selection mode
206 * @port: the port we're looking at
207 *
208 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
209 */
210static inline u32 __get_agg_selection_mode(struct port *port)
211{
212 struct bonding *bond = __get_bond_by_port(port);
213
214 if (bond == NULL)
215 return BOND_AD_STABLE;
216
217 return bond->params.ad_select;
218}
219
220/**
221 * __check_agg_selection_timer - check if the selection timer has expired
222 * @port: the port we're looking at
223 */
224static inline int __check_agg_selection_timer(struct port *port)
225{
226 struct bonding *bond = __get_bond_by_port(port);
227
228 if (bond == NULL)
229 return 0;
230
231 return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0;
232}
233
234/**
235 * __get_link_speed - get a port's speed
236 * @port: the port we're looking at
237 *
238 * Return @port's speed in 802.3ad enum format. i.e. one of:
239 * 0,
240 * %AD_LINK_SPEED_10MBPS,
241 * %AD_LINK_SPEED_100MBPS,
242 * %AD_LINK_SPEED_1000MBPS,
243 * %AD_LINK_SPEED_2500MBPS,
244 * %AD_LINK_SPEED_5000MBPS,
245 * %AD_LINK_SPEED_10000MBPS
246 * %AD_LINK_SPEED_14000MBPS,
247 * %AD_LINK_SPEED_20000MBPS
248 * %AD_LINK_SPEED_25000MBPS
249 * %AD_LINK_SPEED_40000MBPS
250 * %AD_LINK_SPEED_50000MBPS
251 * %AD_LINK_SPEED_56000MBPS
252 * %AD_LINK_SPEED_100000MBPS
253 * %AD_LINK_SPEED_200000MBPS
254 * %AD_LINK_SPEED_400000MBPS
255 * %AD_LINK_SPEED_800000MBPS
256 */
257static u16 __get_link_speed(struct port *port)
258{
259 struct slave *slave = port->slave;
260 u16 speed;
261
262 /* this if covers only a special case: when the configuration starts
263 * with link down, it sets the speed to 0.
264 * This is done in spite of the fact that the e100 driver reports 0
265 * to be compatible with MVT in the future.
266 */
267 if (slave->link != BOND_LINK_UP)
268 speed = 0;
269 else {
270 switch (slave->speed) {
271 case SPEED_10:
272 speed = AD_LINK_SPEED_10MBPS;
273 break;
274
275 case SPEED_100:
276 speed = AD_LINK_SPEED_100MBPS;
277 break;
278
279 case SPEED_1000:
280 speed = AD_LINK_SPEED_1000MBPS;
281 break;
282
283 case SPEED_2500:
284 speed = AD_LINK_SPEED_2500MBPS;
285 break;
286
287 case SPEED_5000:
288 speed = AD_LINK_SPEED_5000MBPS;
289 break;
290
291 case SPEED_10000:
292 speed = AD_LINK_SPEED_10000MBPS;
293 break;
294
295 case SPEED_14000:
296 speed = AD_LINK_SPEED_14000MBPS;
297 break;
298
299 case SPEED_20000:
300 speed = AD_LINK_SPEED_20000MBPS;
301 break;
302
303 case SPEED_25000:
304 speed = AD_LINK_SPEED_25000MBPS;
305 break;
306
307 case SPEED_40000:
308 speed = AD_LINK_SPEED_40000MBPS;
309 break;
310
311 case SPEED_50000:
312 speed = AD_LINK_SPEED_50000MBPS;
313 break;
314
315 case SPEED_56000:
316 speed = AD_LINK_SPEED_56000MBPS;
317 break;
318
319 case SPEED_100000:
320 speed = AD_LINK_SPEED_100000MBPS;
321 break;
322
323 case SPEED_200000:
324 speed = AD_LINK_SPEED_200000MBPS;
325 break;
326
327 case SPEED_400000:
328 speed = AD_LINK_SPEED_400000MBPS;
329 break;
330
331 case SPEED_800000:
332 speed = AD_LINK_SPEED_800000MBPS;
333 break;
334
335 default:
336 /* unknown speed value from ethtool. shouldn't happen */
337 if (slave->speed != SPEED_UNKNOWN)
338 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",
339 slave->bond->dev->name,
340 slave->dev->name, slave->speed,
341 port->actor_port_number);
342 speed = 0;
343 break;
344 }
345 }
346
347 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n",
348 port->actor_port_number, speed);
349 return speed;
350}
351
352/**
353 * __get_duplex - get a port's duplex
354 * @port: the port we're looking at
355 *
356 * Return @port's duplex in 802.3ad bitmask format. i.e.:
357 * 0x01 if in full duplex
358 * 0x00 otherwise
359 */
360static u8 __get_duplex(struct port *port)
361{
362 struct slave *slave = port->slave;
363 u8 retval = 0x0;
364
365 /* handling a special case: when the configuration starts with
366 * link down, it sets the duplex to 0.
367 */
368 if (slave->link == BOND_LINK_UP) {
369 switch (slave->duplex) {
370 case DUPLEX_FULL:
371 retval = 0x1;
372 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",
373 port->actor_port_number);
374 break;
375 case DUPLEX_HALF:
376 default:
377 retval = 0x0;
378 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n",
379 port->actor_port_number);
380 break;
381 }
382 }
383 return retval;
384}
385
386static void __ad_actor_update_port(struct port *port)
387{
388 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
389
390 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
391 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
392}
393
394/* Conversions */
395
396/**
397 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
398 * @timer_type: which timer to operate
399 * @par: timer parameter. see below
400 *
401 * If @timer_type is %current_while_timer, @par indicates long/short timer.
402 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
403 * %SLOW_PERIODIC_TIME.
404 */
405static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
406{
407 u16 retval = 0; /* to silence the compiler */
408
409 switch (timer_type) {
410 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
411 if (par)
412 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
413 else
414 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
415 break;
416 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
417 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
418 break;
419 case AD_PERIODIC_TIMER: /* for periodic machine */
420 retval = (par*ad_ticks_per_sec); /* long timeout */
421 break;
422 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
423 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
424 break;
425 case AD_WAIT_WHILE_TIMER: /* for selection machine */
426 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
427 break;
428 }
429
430 return retval;
431}
432
433
434/* ================= ad_rx_machine helper functions ================== */
435
436/**
437 * __choose_matched - update a port's matched variable from a received lacpdu
438 * @lacpdu: the lacpdu we've received
439 * @port: the port we're looking at
440 *
441 * Update the value of the matched variable, using parameter values from a
442 * newly received lacpdu. Parameter values for the partner carried in the
443 * received PDU are compared with the corresponding operational parameter
444 * values for the actor. Matched is set to TRUE if all of these parameters
445 * match and the PDU parameter partner_state.aggregation has the same value as
446 * actor_oper_port_state.aggregation and lacp will actively maintain the link
447 * in the aggregation. Matched is also set to TRUE if the value of
448 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
449 * an individual link and lacp will actively maintain the link. Otherwise,
450 * matched is set to FALSE. LACP is considered to be actively maintaining the
451 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
452 * the actor's actor_oper_port_state.lacp_activity and the PDU's
453 * partner_state.lacp_activity variables are TRUE.
454 *
455 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
456 * used here to implement the language from 802.3ad 43.4.9 that requires
457 * recordPDU to "match" the LACPDU parameters to the stored values.
458 */
459static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
460{
461 /* check if all parameters are alike
462 * or this is individual link(aggregation == FALSE)
463 * then update the state machine Matched variable.
464 */
465 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
466 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
467 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
468 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
469 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
470 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) ||
471 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0)
472 ) {
473 port->sm_vars |= AD_PORT_MATCHED;
474 } else {
475 port->sm_vars &= ~AD_PORT_MATCHED;
476 }
477}
478
479/**
480 * __record_pdu - record parameters from a received lacpdu
481 * @lacpdu: the lacpdu we've received
482 * @port: the port we're looking at
483 *
484 * Record the parameter values for the Actor carried in a received lacpdu as
485 * the current partner operational parameter values and sets
486 * actor_oper_port_state.defaulted to FALSE.
487 */
488static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
489{
490 if (lacpdu && port) {
491 struct port_params *partner = &port->partner_oper;
492
493 __choose_matched(lacpdu, port);
494 /* record the new parameter values for the partner
495 * operational
496 */
497 partner->port_number = ntohs(lacpdu->actor_port);
498 partner->port_priority = ntohs(lacpdu->actor_port_priority);
499 partner->system = lacpdu->actor_system;
500 partner->system_priority = ntohs(lacpdu->actor_system_priority);
501 partner->key = ntohs(lacpdu->actor_key);
502 partner->port_state = lacpdu->actor_state;
503
504 /* set actor_oper_port_state.defaulted to FALSE */
505 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED;
506
507 /* set the partner sync. to on if the partner is sync,
508 * and the port is matched
509 */
510 if ((port->sm_vars & AD_PORT_MATCHED) &&
511 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) {
512 partner->port_state |= LACP_STATE_SYNCHRONIZATION;
513 slave_dbg(port->slave->bond->dev, port->slave->dev,
514 "partner sync=1\n");
515 } else {
516 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION;
517 slave_dbg(port->slave->bond->dev, port->slave->dev,
518 "partner sync=0\n");
519 }
520 }
521}
522
523/**
524 * __record_default - record default parameters
525 * @port: the port we're looking at
526 *
527 * This function records the default parameter values for the partner carried
528 * in the Partner Admin parameters as the current partner operational parameter
529 * values and sets actor_oper_port_state.defaulted to TRUE.
530 */
531static void __record_default(struct port *port)
532{
533 if (port) {
534 /* record the partner admin parameters */
535 memcpy(&port->partner_oper, &port->partner_admin,
536 sizeof(struct port_params));
537
538 /* set actor_oper_port_state.defaulted to true */
539 port->actor_oper_port_state |= LACP_STATE_DEFAULTED;
540 }
541}
542
543/**
544 * __update_selected - update a port's Selected variable from a received lacpdu
545 * @lacpdu: the lacpdu we've received
546 * @port: the port we're looking at
547 *
548 * Update the value of the selected variable, using parameter values from a
549 * newly received lacpdu. The parameter values for the Actor carried in the
550 * received PDU are compared with the corresponding operational parameter
551 * values for the ports partner. If one or more of the comparisons shows that
552 * the value(s) received in the PDU differ from the current operational values,
553 * then selected is set to FALSE and actor_oper_port_state.synchronization is
554 * set to out_of_sync. Otherwise, selected remains unchanged.
555 */
556static void __update_selected(struct lacpdu *lacpdu, struct port *port)
557{
558 if (lacpdu && port) {
559 const struct port_params *partner = &port->partner_oper;
560
561 /* check if any parameter is different then
562 * update the state machine selected variable.
563 */
564 if (ntohs(lacpdu->actor_port) != partner->port_number ||
565 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
566 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
567 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
568 ntohs(lacpdu->actor_key) != partner->key ||
569 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) {
570 port->sm_vars &= ~AD_PORT_SELECTED;
571 }
572 }
573}
574
575/**
576 * __update_default_selected - update a port's Selected variable from Partner
577 * @port: the port we're looking at
578 *
579 * This function updates the value of the selected variable, using the partner
580 * administrative parameter values. The administrative values are compared with
581 * the corresponding operational parameter values for the partner. If one or
582 * more of the comparisons shows that the administrative value(s) differ from
583 * the current operational values, then Selected is set to FALSE and
584 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
585 * Selected remains unchanged.
586 */
587static void __update_default_selected(struct port *port)
588{
589 if (port) {
590 const struct port_params *admin = &port->partner_admin;
591 const struct port_params *oper = &port->partner_oper;
592
593 /* check if any parameter is different then
594 * update the state machine selected variable.
595 */
596 if (admin->port_number != oper->port_number ||
597 admin->port_priority != oper->port_priority ||
598 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
599 admin->system_priority != oper->system_priority ||
600 admin->key != oper->key ||
601 (admin->port_state & LACP_STATE_AGGREGATION)
602 != (oper->port_state & LACP_STATE_AGGREGATION)) {
603 port->sm_vars &= ~AD_PORT_SELECTED;
604 }
605 }
606}
607
608/**
609 * __update_ntt - update a port's ntt variable from a received lacpdu
610 * @lacpdu: the lacpdu we've received
611 * @port: the port we're looking at
612 *
613 * Updates the value of the ntt variable, using parameter values from a newly
614 * received lacpdu. The parameter values for the partner carried in the
615 * received PDU are compared with the corresponding operational parameter
616 * values for the Actor. If one or more of the comparisons shows that the
617 * value(s) received in the PDU differ from the current operational values,
618 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
619 */
620static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
621{
622 /* validate lacpdu and port */
623 if (lacpdu && port) {
624 /* check if any parameter is different then
625 * update the port->ntt.
626 */
627 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
628 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
629 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
630 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
631 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
632 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) ||
633 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) ||
634 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) ||
635 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION))
636 ) {
637 port->ntt = true;
638 }
639 }
640}
641
642/**
643 * __agg_ports_are_ready - check if all ports in an aggregator are ready
644 * @aggregator: the aggregator we're looking at
645 *
646 */
647static int __agg_ports_are_ready(struct aggregator *aggregator)
648{
649 struct port *port;
650 int retval = 1;
651
652 if (aggregator) {
653 /* scan all ports in this aggregator to verfy if they are
654 * all ready.
655 */
656 for (port = aggregator->lag_ports;
657 port;
658 port = port->next_port_in_aggregator) {
659 if (!(port->sm_vars & AD_PORT_READY_N)) {
660 retval = 0;
661 break;
662 }
663 }
664 }
665
666 return retval;
667}
668
669/**
670 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
671 * @aggregator: the aggregator we're looking at
672 * @val: Should the ports' ready bit be set on or off
673 *
674 */
675static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
676{
677 struct port *port;
678
679 for (port = aggregator->lag_ports; port;
680 port = port->next_port_in_aggregator) {
681 if (val)
682 port->sm_vars |= AD_PORT_READY;
683 else
684 port->sm_vars &= ~AD_PORT_READY;
685 }
686}
687
688static int __agg_active_ports(struct aggregator *agg)
689{
690 struct port *port;
691 int active = 0;
692
693 for (port = agg->lag_ports; port;
694 port = port->next_port_in_aggregator) {
695 if (port->is_enabled)
696 active++;
697 }
698
699 return active;
700}
701
702/**
703 * __get_agg_bandwidth - get the total bandwidth of an aggregator
704 * @aggregator: the aggregator we're looking at
705 *
706 */
707static u32 __get_agg_bandwidth(struct aggregator *aggregator)
708{
709 int nports = __agg_active_ports(aggregator);
710 u32 bandwidth = 0;
711
712 if (nports) {
713 switch (__get_link_speed(aggregator->lag_ports)) {
714 case AD_LINK_SPEED_1MBPS:
715 bandwidth = nports;
716 break;
717 case AD_LINK_SPEED_10MBPS:
718 bandwidth = nports * 10;
719 break;
720 case AD_LINK_SPEED_100MBPS:
721 bandwidth = nports * 100;
722 break;
723 case AD_LINK_SPEED_1000MBPS:
724 bandwidth = nports * 1000;
725 break;
726 case AD_LINK_SPEED_2500MBPS:
727 bandwidth = nports * 2500;
728 break;
729 case AD_LINK_SPEED_5000MBPS:
730 bandwidth = nports * 5000;
731 break;
732 case AD_LINK_SPEED_10000MBPS:
733 bandwidth = nports * 10000;
734 break;
735 case AD_LINK_SPEED_14000MBPS:
736 bandwidth = nports * 14000;
737 break;
738 case AD_LINK_SPEED_20000MBPS:
739 bandwidth = nports * 20000;
740 break;
741 case AD_LINK_SPEED_25000MBPS:
742 bandwidth = nports * 25000;
743 break;
744 case AD_LINK_SPEED_40000MBPS:
745 bandwidth = nports * 40000;
746 break;
747 case AD_LINK_SPEED_50000MBPS:
748 bandwidth = nports * 50000;
749 break;
750 case AD_LINK_SPEED_56000MBPS:
751 bandwidth = nports * 56000;
752 break;
753 case AD_LINK_SPEED_100000MBPS:
754 bandwidth = nports * 100000;
755 break;
756 case AD_LINK_SPEED_200000MBPS:
757 bandwidth = nports * 200000;
758 break;
759 case AD_LINK_SPEED_400000MBPS:
760 bandwidth = nports * 400000;
761 break;
762 case AD_LINK_SPEED_800000MBPS:
763 bandwidth = nports * 800000;
764 break;
765 default:
766 bandwidth = 0; /* to silence the compiler */
767 }
768 }
769 return bandwidth;
770}
771
772/**
773 * __get_active_agg - get the current active aggregator
774 * @aggregator: the aggregator we're looking at
775 *
776 * Caller must hold RCU lock.
777 */
778static struct aggregator *__get_active_agg(struct aggregator *aggregator)
779{
780 struct bonding *bond = aggregator->slave->bond;
781 struct list_head *iter;
782 struct slave *slave;
783
784 bond_for_each_slave_rcu(bond, slave, iter)
785 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
786 return &(SLAVE_AD_INFO(slave)->aggregator);
787
788 return NULL;
789}
790
791/**
792 * __update_lacpdu_from_port - update a port's lacpdu fields
793 * @port: the port we're looking at
794 */
795static inline void __update_lacpdu_from_port(struct port *port)
796{
797 struct lacpdu *lacpdu = &port->lacpdu;
798 const struct port_params *partner = &port->partner_oper;
799
800 /* update current actual Actor parameters
801 * lacpdu->subtype initialized
802 * lacpdu->version_number initialized
803 * lacpdu->tlv_type_actor_info initialized
804 * lacpdu->actor_information_length initialized
805 */
806
807 lacpdu->actor_system_priority = htons(port->actor_system_priority);
808 lacpdu->actor_system = port->actor_system;
809 lacpdu->actor_key = htons(port->actor_oper_port_key);
810 lacpdu->actor_port_priority = htons(port->actor_port_priority);
811 lacpdu->actor_port = htons(port->actor_port_number);
812 lacpdu->actor_state = port->actor_oper_port_state;
813 slave_dbg(port->slave->bond->dev, port->slave->dev,
814 "update lacpdu: actor port state %x\n",
815 port->actor_oper_port_state);
816
817 /* lacpdu->reserved_3_1 initialized
818 * lacpdu->tlv_type_partner_info initialized
819 * lacpdu->partner_information_length initialized
820 */
821
822 lacpdu->partner_system_priority = htons(partner->system_priority);
823 lacpdu->partner_system = partner->system;
824 lacpdu->partner_key = htons(partner->key);
825 lacpdu->partner_port_priority = htons(partner->port_priority);
826 lacpdu->partner_port = htons(partner->port_number);
827 lacpdu->partner_state = partner->port_state;
828
829 /* lacpdu->reserved_3_2 initialized
830 * lacpdu->tlv_type_collector_info initialized
831 * lacpdu->collector_information_length initialized
832 * collector_max_delay initialized
833 * reserved_12[12] initialized
834 * tlv_type_terminator initialized
835 * terminator_length initialized
836 * reserved_50[50] initialized
837 */
838}
839
840/* ================= main 802.3ad protocol code ========================= */
841
842/**
843 * ad_lacpdu_send - send out a lacpdu packet on a given port
844 * @port: the port we're looking at
845 *
846 * Returns: 0 on success
847 * < 0 on error
848 */
849static int ad_lacpdu_send(struct port *port)
850{
851 struct slave *slave = port->slave;
852 struct sk_buff *skb;
853 struct lacpdu_header *lacpdu_header;
854 int length = sizeof(struct lacpdu_header);
855
856 skb = dev_alloc_skb(length);
857 if (!skb)
858 return -ENOMEM;
859
860 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);
861 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);
862
863 skb->dev = slave->dev;
864 skb_reset_mac_header(skb);
865 skb->network_header = skb->mac_header + ETH_HLEN;
866 skb->protocol = PKT_TYPE_LACPDU;
867 skb->priority = TC_PRIO_CONTROL;
868
869 lacpdu_header = skb_put(skb, length);
870
871 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
872 /* Note: source address is set to be the member's PERMANENT address,
873 * because we use it to identify loopback lacpdus in receive.
874 */
875 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
876 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
877
878 lacpdu_header->lacpdu = port->lacpdu;
879
880 dev_queue_xmit(skb);
881
882 return 0;
883}
884
885/**
886 * ad_marker_send - send marker information/response on a given port
887 * @port: the port we're looking at
888 * @marker: marker data to send
889 *
890 * Returns: 0 on success
891 * < 0 on error
892 */
893static int ad_marker_send(struct port *port, struct bond_marker *marker)
894{
895 struct slave *slave = port->slave;
896 struct sk_buff *skb;
897 struct bond_marker_header *marker_header;
898 int length = sizeof(struct bond_marker_header);
899
900 skb = dev_alloc_skb(length + 16);
901 if (!skb)
902 return -ENOMEM;
903
904 switch (marker->tlv_type) {
905 case AD_MARKER_INFORMATION_SUBTYPE:
906 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);
907 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);
908 break;
909 case AD_MARKER_RESPONSE_SUBTYPE:
910 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);
911 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);
912 break;
913 }
914
915 skb_reserve(skb, 16);
916
917 skb->dev = slave->dev;
918 skb_reset_mac_header(skb);
919 skb->network_header = skb->mac_header + ETH_HLEN;
920 skb->protocol = PKT_TYPE_LACPDU;
921
922 marker_header = skb_put(skb, length);
923
924 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
925 /* Note: source address is set to be the member's PERMANENT address,
926 * because we use it to identify loopback MARKERs in receive.
927 */
928 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
929 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
930
931 marker_header->marker = *marker;
932
933 dev_queue_xmit(skb);
934
935 return 0;
936}
937
938/**
939 * ad_mux_machine - handle a port's mux state machine
940 * @port: the port we're looking at
941 * @update_slave_arr: Does slave array need update?
942 */
943static void ad_mux_machine(struct port *port, bool *update_slave_arr)
944{
945 mux_states_t last_state;
946
947 /* keep current State Machine state to compare later if it was
948 * changed
949 */
950 last_state = port->sm_mux_state;
951
952 if (port->sm_vars & AD_PORT_BEGIN) {
953 port->sm_mux_state = AD_MUX_DETACHED;
954 } else {
955 switch (port->sm_mux_state) {
956 case AD_MUX_DETACHED:
957 if ((port->sm_vars & AD_PORT_SELECTED)
958 || (port->sm_vars & AD_PORT_STANDBY))
959 /* if SELECTED or STANDBY */
960 port->sm_mux_state = AD_MUX_WAITING;
961 break;
962 case AD_MUX_WAITING:
963 /* if SELECTED == FALSE return to DETACH state */
964 if (!(port->sm_vars & AD_PORT_SELECTED)) {
965 port->sm_vars &= ~AD_PORT_READY_N;
966 /* in order to withhold the Selection Logic to
967 * check all ports READY_N value every callback
968 * cycle to update ready variable, we check
969 * READY_N and update READY here
970 */
971 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
972 port->sm_mux_state = AD_MUX_DETACHED;
973 break;
974 }
975
976 /* check if the wait_while_timer expired */
977 if (port->sm_mux_timer_counter
978 && !(--port->sm_mux_timer_counter))
979 port->sm_vars |= AD_PORT_READY_N;
980
981 /* in order to withhold the selection logic to check
982 * all ports READY_N value every callback cycle to
983 * update ready variable, we check READY_N and update
984 * READY here
985 */
986 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
987
988 /* if the wait_while_timer expired, and the port is
989 * in READY state, move to ATTACHED state
990 */
991 if ((port->sm_vars & AD_PORT_READY)
992 && !port->sm_mux_timer_counter)
993 port->sm_mux_state = AD_MUX_ATTACHED;
994 break;
995 case AD_MUX_ATTACHED:
996 /* check also if agg_select_timer expired (so the
997 * edable port will take place only after this timer)
998 */
999 if ((port->sm_vars & AD_PORT_SELECTED) &&
1000 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&
1001 !__check_agg_selection_timer(port)) {
1002 if (port->aggregator->is_active)
1003 port->sm_mux_state =
1004 AD_MUX_COLLECTING_DISTRIBUTING;
1005 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
1006 (port->sm_vars & AD_PORT_STANDBY)) {
1007 /* if UNSELECTED or STANDBY */
1008 port->sm_vars &= ~AD_PORT_READY_N;
1009 /* in order to withhold the selection logic to
1010 * check all ports READY_N value every callback
1011 * cycle to update ready variable, we check
1012 * READY_N and update READY here
1013 */
1014 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1015 port->sm_mux_state = AD_MUX_DETACHED;
1016 } else if (port->aggregator->is_active) {
1017 port->actor_oper_port_state |=
1018 LACP_STATE_SYNCHRONIZATION;
1019 }
1020 break;
1021 case AD_MUX_COLLECTING_DISTRIBUTING:
1022 if (!(port->sm_vars & AD_PORT_SELECTED) ||
1023 (port->sm_vars & AD_PORT_STANDBY) ||
1024 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||
1025 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) {
1026 port->sm_mux_state = AD_MUX_ATTACHED;
1027 } else {
1028 /* if port state hasn't changed make
1029 * sure that a collecting distributing
1030 * port in an active aggregator is enabled
1031 */
1032 if (port->aggregator &&
1033 port->aggregator->is_active &&
1034 !__port_is_enabled(port)) {
1035 __enable_port(port);
1036 *update_slave_arr = true;
1037 }
1038 }
1039 break;
1040 default:
1041 break;
1042 }
1043 }
1044
1045 /* check if the state machine was changed */
1046 if (port->sm_mux_state != last_state) {
1047 slave_dbg(port->slave->bond->dev, port->slave->dev,
1048 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
1049 port->actor_port_number,
1050 last_state,
1051 port->sm_mux_state);
1052 switch (port->sm_mux_state) {
1053 case AD_MUX_DETACHED:
1054 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
1055 ad_disable_collecting_distributing(port,
1056 update_slave_arr);
1057 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
1058 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
1059 port->ntt = true;
1060 break;
1061 case AD_MUX_WAITING:
1062 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1063 break;
1064 case AD_MUX_ATTACHED:
1065 if (port->aggregator->is_active)
1066 port->actor_oper_port_state |=
1067 LACP_STATE_SYNCHRONIZATION;
1068 else
1069 port->actor_oper_port_state &=
1070 ~LACP_STATE_SYNCHRONIZATION;
1071 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
1072 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
1073 ad_disable_collecting_distributing(port,
1074 update_slave_arr);
1075 port->ntt = true;
1076 break;
1077 case AD_MUX_COLLECTING_DISTRIBUTING:
1078 port->actor_oper_port_state |= LACP_STATE_COLLECTING;
1079 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;
1080 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;
1081 ad_enable_collecting_distributing(port,
1082 update_slave_arr);
1083 port->ntt = true;
1084 break;
1085 default:
1086 break;
1087 }
1088 }
1089}
1090
1091/**
1092 * ad_rx_machine - handle a port's rx State Machine
1093 * @lacpdu: the lacpdu we've received
1094 * @port: the port we're looking at
1095 *
1096 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1097 * CURRENT. If timer expired set the state machine in the proper state.
1098 * In other cases, this function checks if we need to switch to other state.
1099 */
1100static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1101{
1102 rx_states_t last_state;
1103
1104 /* keep current State Machine state to compare later if it was
1105 * changed
1106 */
1107 last_state = port->sm_rx_state;
1108
1109 if (lacpdu) {
1110 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx);
1111 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx);
1112 }
1113 /* check if state machine should change state */
1114
1115 /* first, check if port was reinitialized */
1116 if (port->sm_vars & AD_PORT_BEGIN) {
1117 port->sm_rx_state = AD_RX_INITIALIZE;
1118 port->sm_vars |= AD_PORT_CHURNED;
1119 /* check if port is not enabled */
1120 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
1121 port->sm_rx_state = AD_RX_PORT_DISABLED;
1122 /* check if new lacpdu arrived */
1123 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1124 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1125 (port->sm_rx_state == AD_RX_CURRENT))) {
1126 if (port->sm_rx_state != AD_RX_CURRENT)
1127 port->sm_vars |= AD_PORT_CHURNED;
1128 port->sm_rx_timer_counter = 0;
1129 port->sm_rx_state = AD_RX_CURRENT;
1130 } else {
1131 /* if timer is on, and if it is expired */
1132 if (port->sm_rx_timer_counter &&
1133 !(--port->sm_rx_timer_counter)) {
1134 switch (port->sm_rx_state) {
1135 case AD_RX_EXPIRED:
1136 port->sm_rx_state = AD_RX_DEFAULTED;
1137 break;
1138 case AD_RX_CURRENT:
1139 port->sm_rx_state = AD_RX_EXPIRED;
1140 break;
1141 default:
1142 break;
1143 }
1144 } else {
1145 /* if no lacpdu arrived and no timer is on */
1146 switch (port->sm_rx_state) {
1147 case AD_RX_PORT_DISABLED:
1148 if (port->is_enabled &&
1149 (port->sm_vars & AD_PORT_LACP_ENABLED))
1150 port->sm_rx_state = AD_RX_EXPIRED;
1151 else if (port->is_enabled
1152 && ((port->sm_vars
1153 & AD_PORT_LACP_ENABLED) == 0))
1154 port->sm_rx_state = AD_RX_LACP_DISABLED;
1155 break;
1156 default:
1157 break;
1158
1159 }
1160 }
1161 }
1162
1163 /* check if the State machine was changed or new lacpdu arrived */
1164 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1165 slave_dbg(port->slave->bond->dev, port->slave->dev,
1166 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1167 port->actor_port_number,
1168 last_state,
1169 port->sm_rx_state);
1170 switch (port->sm_rx_state) {
1171 case AD_RX_INITIALIZE:
1172 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1173 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1174 else
1175 port->sm_vars |= AD_PORT_LACP_ENABLED;
1176 port->sm_vars &= ~AD_PORT_SELECTED;
1177 __record_default(port);
1178 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1179 port->sm_rx_state = AD_RX_PORT_DISABLED;
1180
1181 fallthrough;
1182 case AD_RX_PORT_DISABLED:
1183 port->sm_vars &= ~AD_PORT_MATCHED;
1184 break;
1185 case AD_RX_LACP_DISABLED:
1186 port->sm_vars &= ~AD_PORT_SELECTED;
1187 __record_default(port);
1188 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION;
1189 port->sm_vars |= AD_PORT_MATCHED;
1190 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1191 break;
1192 case AD_RX_EXPIRED:
1193 /* Reset of the Synchronization flag (Standard 43.4.12)
1194 * This reset cause to disable this port in the
1195 * COLLECTING_DISTRIBUTING state of the mux machine in
1196 * case of EXPIRED even if LINK_DOWN didn't arrive for
1197 * the port.
1198 */
1199 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION;
1200 port->sm_vars &= ~AD_PORT_MATCHED;
1201 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT;
1202 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY;
1203 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1204 port->actor_oper_port_state |= LACP_STATE_EXPIRED;
1205 port->sm_vars |= AD_PORT_CHURNED;
1206 break;
1207 case AD_RX_DEFAULTED:
1208 __update_default_selected(port);
1209 __record_default(port);
1210 port->sm_vars |= AD_PORT_MATCHED;
1211 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1212 break;
1213 case AD_RX_CURRENT:
1214 /* detect loopback situation */
1215 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1216 &(port->actor_system))) {
1217 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n"
1218 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n");
1219 return;
1220 }
1221 __update_selected(lacpdu, port);
1222 __update_ntt(lacpdu, port);
1223 __record_pdu(lacpdu, port);
1224 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT));
1225 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1226 break;
1227 default:
1228 break;
1229 }
1230 }
1231}
1232
1233/**
1234 * ad_churn_machine - handle port churn's state machine
1235 * @port: the port we're looking at
1236 *
1237 */
1238static void ad_churn_machine(struct port *port)
1239{
1240 if (port->sm_vars & AD_PORT_CHURNED) {
1241 port->sm_vars &= ~AD_PORT_CHURNED;
1242 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1243 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1244 port->sm_churn_actor_timer_counter =
1245 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1246 port->sm_churn_partner_timer_counter =
1247 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1248 return;
1249 }
1250 if (port->sm_churn_actor_timer_counter &&
1251 !(--port->sm_churn_actor_timer_counter) &&
1252 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1253 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) {
1254 port->sm_churn_actor_state = AD_NO_CHURN;
1255 } else {
1256 port->churn_actor_count++;
1257 port->sm_churn_actor_state = AD_CHURN;
1258 }
1259 }
1260 if (port->sm_churn_partner_timer_counter &&
1261 !(--port->sm_churn_partner_timer_counter) &&
1262 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1263 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) {
1264 port->sm_churn_partner_state = AD_NO_CHURN;
1265 } else {
1266 port->churn_partner_count++;
1267 port->sm_churn_partner_state = AD_CHURN;
1268 }
1269 }
1270}
1271
1272/**
1273 * ad_tx_machine - handle a port's tx state machine
1274 * @port: the port we're looking at
1275 */
1276static void ad_tx_machine(struct port *port)
1277{
1278 /* check if tx timer expired, to verify that we do not send more than
1279 * 3 packets per second
1280 */
1281 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1282 /* check if there is something to send */
1283 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1284 __update_lacpdu_from_port(port);
1285
1286 if (ad_lacpdu_send(port) >= 0) {
1287 slave_dbg(port->slave->bond->dev,
1288 port->slave->dev,
1289 "Sent LACPDU on port %d\n",
1290 port->actor_port_number);
1291
1292 /* mark ntt as false, so it will not be sent
1293 * again until demanded
1294 */
1295 port->ntt = false;
1296 }
1297 }
1298 /* restart tx timer(to verify that we will not exceed
1299 * AD_MAX_TX_IN_SECOND
1300 */
1301 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1302 }
1303}
1304
1305/**
1306 * ad_periodic_machine - handle a port's periodic state machine
1307 * @port: the port we're looking at
1308 * @bond_params: bond parameters we will use
1309 *
1310 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1311 */
1312static void ad_periodic_machine(struct port *port, struct bond_params *bond_params)
1313{
1314 periodic_states_t last_state;
1315
1316 /* keep current state machine state to compare later if it was changed */
1317 last_state = port->sm_periodic_state;
1318
1319 /* check if port was reinitialized */
1320 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1321 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) ||
1322 !bond_params->lacp_active) {
1323 port->sm_periodic_state = AD_NO_PERIODIC;
1324 }
1325 /* check if state machine should change state */
1326 else if (port->sm_periodic_timer_counter) {
1327 /* check if periodic state machine expired */
1328 if (!(--port->sm_periodic_timer_counter)) {
1329 /* if expired then do tx */
1330 port->sm_periodic_state = AD_PERIODIC_TX;
1331 } else {
1332 /* If not expired, check if there is some new timeout
1333 * parameter from the partner state
1334 */
1335 switch (port->sm_periodic_state) {
1336 case AD_FAST_PERIODIC:
1337 if (!(port->partner_oper.port_state
1338 & LACP_STATE_LACP_TIMEOUT))
1339 port->sm_periodic_state = AD_SLOW_PERIODIC;
1340 break;
1341 case AD_SLOW_PERIODIC:
1342 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) {
1343 port->sm_periodic_timer_counter = 0;
1344 port->sm_periodic_state = AD_PERIODIC_TX;
1345 }
1346 break;
1347 default:
1348 break;
1349 }
1350 }
1351 } else {
1352 switch (port->sm_periodic_state) {
1353 case AD_NO_PERIODIC:
1354 port->sm_periodic_state = AD_FAST_PERIODIC;
1355 break;
1356 case AD_PERIODIC_TX:
1357 if (!(port->partner_oper.port_state &
1358 LACP_STATE_LACP_TIMEOUT))
1359 port->sm_periodic_state = AD_SLOW_PERIODIC;
1360 else
1361 port->sm_periodic_state = AD_FAST_PERIODIC;
1362 break;
1363 default:
1364 break;
1365 }
1366 }
1367
1368 /* check if the state machine was changed */
1369 if (port->sm_periodic_state != last_state) {
1370 slave_dbg(port->slave->bond->dev, port->slave->dev,
1371 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1372 port->actor_port_number, last_state,
1373 port->sm_periodic_state);
1374 switch (port->sm_periodic_state) {
1375 case AD_NO_PERIODIC:
1376 port->sm_periodic_timer_counter = 0;
1377 break;
1378 case AD_FAST_PERIODIC:
1379 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1380 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1381 break;
1382 case AD_SLOW_PERIODIC:
1383 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1384 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1385 break;
1386 case AD_PERIODIC_TX:
1387 port->ntt = true;
1388 break;
1389 default:
1390 break;
1391 }
1392 }
1393}
1394
1395/**
1396 * ad_port_selection_logic - select aggregation groups
1397 * @port: the port we're looking at
1398 * @update_slave_arr: Does slave array need update?
1399 *
1400 * Select aggregation groups, and assign each port for it's aggregetor. The
1401 * selection logic is called in the inititalization (after all the handshkes),
1402 * and after every lacpdu receive (if selected is off).
1403 */
1404static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1405{
1406 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1407 struct port *last_port = NULL, *curr_port;
1408 struct list_head *iter;
1409 struct bonding *bond;
1410 struct slave *slave;
1411 int found = 0;
1412
1413 /* if the port is already Selected, do nothing */
1414 if (port->sm_vars & AD_PORT_SELECTED)
1415 return;
1416
1417 bond = __get_bond_by_port(port);
1418
1419 /* if the port is connected to other aggregator, detach it */
1420 if (port->aggregator) {
1421 /* detach the port from its former aggregator */
1422 temp_aggregator = port->aggregator;
1423 for (curr_port = temp_aggregator->lag_ports; curr_port;
1424 last_port = curr_port,
1425 curr_port = curr_port->next_port_in_aggregator) {
1426 if (curr_port == port) {
1427 temp_aggregator->num_of_ports--;
1428 /* if it is the first port attached to the
1429 * aggregator
1430 */
1431 if (!last_port) {
1432 temp_aggregator->lag_ports =
1433 port->next_port_in_aggregator;
1434 } else {
1435 /* not the first port attached to the
1436 * aggregator
1437 */
1438 last_port->next_port_in_aggregator =
1439 port->next_port_in_aggregator;
1440 }
1441
1442 /* clear the port's relations to this
1443 * aggregator
1444 */
1445 port->aggregator = NULL;
1446 port->next_port_in_aggregator = NULL;
1447 port->actor_port_aggregator_identifier = 0;
1448
1449 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n",
1450 port->actor_port_number,
1451 temp_aggregator->aggregator_identifier);
1452 /* if the aggregator is empty, clear its
1453 * parameters, and set it ready to be attached
1454 */
1455 if (!temp_aggregator->lag_ports)
1456 ad_clear_agg(temp_aggregator);
1457 break;
1458 }
1459 }
1460 if (!curr_port) {
1461 /* meaning: the port was related to an aggregator
1462 * but was not on the aggregator port list
1463 */
1464 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n",
1465 port->slave->bond->dev->name,
1466 port->slave->dev->name,
1467 port->actor_port_number,
1468 port->aggregator->aggregator_identifier);
1469 }
1470 }
1471 /* search on all aggregators for a suitable aggregator for this port */
1472 bond_for_each_slave(bond, slave, iter) {
1473 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1474
1475 /* keep a free aggregator for later use(if needed) */
1476 if (!aggregator->lag_ports) {
1477 if (!free_aggregator)
1478 free_aggregator = aggregator;
1479 continue;
1480 }
1481 /* check if current aggregator suits us */
1482 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1483 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1484 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1485 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1486 ) &&
1487 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1488 !aggregator->is_individual) /* but is not individual OR */
1489 )
1490 ) {
1491 /* attach to the founded aggregator */
1492 port->aggregator = aggregator;
1493 port->actor_port_aggregator_identifier =
1494 port->aggregator->aggregator_identifier;
1495 port->next_port_in_aggregator = aggregator->lag_ports;
1496 port->aggregator->num_of_ports++;
1497 aggregator->lag_ports = port;
1498 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n",
1499 port->actor_port_number,
1500 port->aggregator->aggregator_identifier);
1501
1502 /* mark this port as selected */
1503 port->sm_vars |= AD_PORT_SELECTED;
1504 found = 1;
1505 break;
1506 }
1507 }
1508
1509 /* the port couldn't find an aggregator - attach it to a new
1510 * aggregator
1511 */
1512 if (!found) {
1513 if (free_aggregator) {
1514 /* assign port a new aggregator */
1515 port->aggregator = free_aggregator;
1516 port->actor_port_aggregator_identifier =
1517 port->aggregator->aggregator_identifier;
1518
1519 /* update the new aggregator's parameters
1520 * if port was responsed from the end-user
1521 */
1522 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1523 /* if port is full duplex */
1524 port->aggregator->is_individual = false;
1525 else
1526 port->aggregator->is_individual = true;
1527
1528 port->aggregator->actor_admin_aggregator_key =
1529 port->actor_admin_port_key;
1530 port->aggregator->actor_oper_aggregator_key =
1531 port->actor_oper_port_key;
1532 port->aggregator->partner_system =
1533 port->partner_oper.system;
1534 port->aggregator->partner_system_priority =
1535 port->partner_oper.system_priority;
1536 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1537 port->aggregator->receive_state = 1;
1538 port->aggregator->transmit_state = 1;
1539 port->aggregator->lag_ports = port;
1540 port->aggregator->num_of_ports++;
1541
1542 /* mark this port as selected */
1543 port->sm_vars |= AD_PORT_SELECTED;
1544
1545 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n",
1546 port->actor_port_number,
1547 port->aggregator->aggregator_identifier);
1548 } else {
1549 slave_err(bond->dev, port->slave->dev,
1550 "Port %d did not find a suitable aggregator\n",
1551 port->actor_port_number);
1552 return;
1553 }
1554 }
1555 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1556 * in all aggregator's ports, else set ready=FALSE in all
1557 * aggregator's ports
1558 */
1559 __set_agg_ports_ready(port->aggregator,
1560 __agg_ports_are_ready(port->aggregator));
1561
1562 aggregator = __get_first_agg(port);
1563 ad_agg_selection_logic(aggregator, update_slave_arr);
1564
1565 if (!port->aggregator->is_active)
1566 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
1567}
1568
1569/* Decide if "agg" is a better choice for the new active aggregator that
1570 * the current best, according to the ad_select policy.
1571 */
1572static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1573 struct aggregator *curr)
1574{
1575 /* 0. If no best, select current.
1576 *
1577 * 1. If the current agg is not individual, and the best is
1578 * individual, select current.
1579 *
1580 * 2. If current agg is individual and the best is not, keep best.
1581 *
1582 * 3. Therefore, current and best are both individual or both not
1583 * individual, so:
1584 *
1585 * 3a. If current agg partner replied, and best agg partner did not,
1586 * select current.
1587 *
1588 * 3b. If current agg partner did not reply and best agg partner
1589 * did reply, keep best.
1590 *
1591 * 4. Therefore, current and best both have partner replies or
1592 * both do not, so perform selection policy:
1593 *
1594 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1595 * select by bandwidth.
1596 *
1597 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1598 */
1599 if (!best)
1600 return curr;
1601
1602 if (!curr->is_individual && best->is_individual)
1603 return curr;
1604
1605 if (curr->is_individual && !best->is_individual)
1606 return best;
1607
1608 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1609 return curr;
1610
1611 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1612 return best;
1613
1614 switch (__get_agg_selection_mode(curr->lag_ports)) {
1615 case BOND_AD_COUNT:
1616 if (__agg_active_ports(curr) > __agg_active_ports(best))
1617 return curr;
1618
1619 if (__agg_active_ports(curr) < __agg_active_ports(best))
1620 return best;
1621
1622 fallthrough;
1623 case BOND_AD_STABLE:
1624 case BOND_AD_BANDWIDTH:
1625 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1626 return curr;
1627
1628 break;
1629
1630 default:
1631 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n",
1632 curr->slave->bond->dev->name,
1633 curr->slave->dev->name,
1634 __get_agg_selection_mode(curr->lag_ports));
1635 break;
1636 }
1637
1638 return best;
1639}
1640
1641static int agg_device_up(const struct aggregator *agg)
1642{
1643 struct port *port = agg->lag_ports;
1644
1645 if (!port)
1646 return 0;
1647
1648 for (port = agg->lag_ports; port;
1649 port = port->next_port_in_aggregator) {
1650 if (netif_running(port->slave->dev) &&
1651 netif_carrier_ok(port->slave->dev))
1652 return 1;
1653 }
1654
1655 return 0;
1656}
1657
1658/**
1659 * ad_agg_selection_logic - select an aggregation group for a team
1660 * @agg: the aggregator we're looking at
1661 * @update_slave_arr: Does slave array need update?
1662 *
1663 * It is assumed that only one aggregator may be selected for a team.
1664 *
1665 * The logic of this function is to select the aggregator according to
1666 * the ad_select policy:
1667 *
1668 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1669 * it, and to reselect the active aggregator only if the previous
1670 * aggregator has no more ports related to it.
1671 *
1672 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1673 * bandwidth, and reselect whenever a link state change takes place or the
1674 * set of slaves in the bond changes.
1675 *
1676 * BOND_AD_COUNT: select the aggregator with largest number of ports
1677 * (slaves), and reselect whenever a link state change takes place or the
1678 * set of slaves in the bond changes.
1679 *
1680 * FIXME: this function MUST be called with the first agg in the bond, or
1681 * __get_active_agg() won't work correctly. This function should be better
1682 * called with the bond itself, and retrieve the first agg from it.
1683 */
1684static void ad_agg_selection_logic(struct aggregator *agg,
1685 bool *update_slave_arr)
1686{
1687 struct aggregator *best, *active, *origin;
1688 struct bonding *bond = agg->slave->bond;
1689 struct list_head *iter;
1690 struct slave *slave;
1691 struct port *port;
1692
1693 rcu_read_lock();
1694 origin = agg;
1695 active = __get_active_agg(agg);
1696 best = (active && agg_device_up(active)) ? active : NULL;
1697
1698 bond_for_each_slave_rcu(bond, slave, iter) {
1699 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1700
1701 agg->is_active = 0;
1702
1703 if (__agg_active_ports(agg) && agg_device_up(agg))
1704 best = ad_agg_selection_test(best, agg);
1705 }
1706
1707 if (best &&
1708 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1709 /* For the STABLE policy, don't replace the old active
1710 * aggregator if it's still active (it has an answering
1711 * partner) or if both the best and active don't have an
1712 * answering partner.
1713 */
1714 if (active && active->lag_ports &&
1715 __agg_active_ports(active) &&
1716 (__agg_has_partner(active) ||
1717 (!__agg_has_partner(active) &&
1718 !__agg_has_partner(best)))) {
1719 if (!(!active->actor_oper_aggregator_key &&
1720 best->actor_oper_aggregator_key)) {
1721 best = NULL;
1722 active->is_active = 1;
1723 }
1724 }
1725 }
1726
1727 if (best && (best == active)) {
1728 best = NULL;
1729 active->is_active = 1;
1730 }
1731
1732 /* if there is new best aggregator, activate it */
1733 if (best) {
1734 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1735 best->slave ? best->slave->dev->name : "NULL",
1736 best->aggregator_identifier, best->num_of_ports,
1737 best->actor_oper_aggregator_key,
1738 best->partner_oper_aggregator_key,
1739 best->is_individual, best->is_active);
1740 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n",
1741 best->slave ? best->slave->dev->name : "NULL",
1742 best->lag_ports, best->slave);
1743
1744 bond_for_each_slave_rcu(bond, slave, iter) {
1745 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1746
1747 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1748 agg->aggregator_identifier, agg->num_of_ports,
1749 agg->actor_oper_aggregator_key,
1750 agg->partner_oper_aggregator_key,
1751 agg->is_individual, agg->is_active);
1752 }
1753
1754 /* check if any partner replies */
1755 if (best->is_individual)
1756 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1757 bond->dev->name);
1758
1759 best->is_active = 1;
1760 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n",
1761 best->slave ? best->slave->dev->name : "NULL",
1762 best->aggregator_identifier);
1763 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1764 best->slave ? best->slave->dev->name : "NULL",
1765 best->aggregator_identifier, best->num_of_ports,
1766 best->actor_oper_aggregator_key,
1767 best->partner_oper_aggregator_key,
1768 best->is_individual, best->is_active);
1769
1770 /* disable the ports that were related to the former
1771 * active_aggregator
1772 */
1773 if (active) {
1774 for (port = active->lag_ports; port;
1775 port = port->next_port_in_aggregator) {
1776 __disable_port(port);
1777 }
1778 }
1779 /* Slave array needs update. */
1780 *update_slave_arr = true;
1781 }
1782
1783 /* if the selected aggregator is of join individuals
1784 * (partner_system is NULL), enable their ports
1785 */
1786 active = __get_active_agg(origin);
1787
1788 if (active) {
1789 if (!__agg_has_partner(active)) {
1790 for (port = active->lag_ports; port;
1791 port = port->next_port_in_aggregator) {
1792 __enable_port(port);
1793 }
1794 *update_slave_arr = true;
1795 }
1796 }
1797
1798 rcu_read_unlock();
1799
1800 bond_3ad_set_carrier(bond);
1801}
1802
1803/**
1804 * ad_clear_agg - clear a given aggregator's parameters
1805 * @aggregator: the aggregator we're looking at
1806 */
1807static void ad_clear_agg(struct aggregator *aggregator)
1808{
1809 if (aggregator) {
1810 aggregator->is_individual = false;
1811 aggregator->actor_admin_aggregator_key = 0;
1812 aggregator->actor_oper_aggregator_key = 0;
1813 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1814 aggregator->partner_system_priority = 0;
1815 aggregator->partner_oper_aggregator_key = 0;
1816 aggregator->receive_state = 0;
1817 aggregator->transmit_state = 0;
1818 aggregator->lag_ports = NULL;
1819 aggregator->is_active = 0;
1820 aggregator->num_of_ports = 0;
1821 pr_debug("%s: LAG %d was cleared\n",
1822 aggregator->slave ?
1823 aggregator->slave->dev->name : "NULL",
1824 aggregator->aggregator_identifier);
1825 }
1826}
1827
1828/**
1829 * ad_initialize_agg - initialize a given aggregator's parameters
1830 * @aggregator: the aggregator we're looking at
1831 */
1832static void ad_initialize_agg(struct aggregator *aggregator)
1833{
1834 if (aggregator) {
1835 ad_clear_agg(aggregator);
1836
1837 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1838 aggregator->aggregator_identifier = 0;
1839 aggregator->slave = NULL;
1840 }
1841}
1842
1843/**
1844 * ad_initialize_port - initialize a given port's parameters
1845 * @port: the port we're looking at
1846 * @lacp_fast: boolean. whether fast periodic should be used
1847 */
1848static void ad_initialize_port(struct port *port, int lacp_fast)
1849{
1850 static const struct port_params tmpl = {
1851 .system_priority = 0xffff,
1852 .key = 1,
1853 .port_number = 1,
1854 .port_priority = 0xff,
1855 .port_state = 1,
1856 };
1857 static const struct lacpdu lacpdu = {
1858 .subtype = 0x01,
1859 .version_number = 0x01,
1860 .tlv_type_actor_info = 0x01,
1861 .actor_information_length = 0x14,
1862 .tlv_type_partner_info = 0x02,
1863 .partner_information_length = 0x14,
1864 .tlv_type_collector_info = 0x03,
1865 .collector_information_length = 0x10,
1866 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1867 };
1868
1869 if (port) {
1870 port->actor_port_priority = 0xff;
1871 port->actor_port_aggregator_identifier = 0;
1872 port->ntt = false;
1873 port->actor_admin_port_state = LACP_STATE_AGGREGATION |
1874 LACP_STATE_LACP_ACTIVITY;
1875 port->actor_oper_port_state = LACP_STATE_AGGREGATION |
1876 LACP_STATE_LACP_ACTIVITY;
1877
1878 if (lacp_fast)
1879 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
1880
1881 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1882 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1883
1884 port->is_enabled = true;
1885 /* private parameters */
1886 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1887 port->sm_rx_state = 0;
1888 port->sm_rx_timer_counter = 0;
1889 port->sm_periodic_state = 0;
1890 port->sm_periodic_timer_counter = 0;
1891 port->sm_mux_state = 0;
1892 port->sm_mux_timer_counter = 0;
1893 port->sm_tx_state = 0;
1894 port->aggregator = NULL;
1895 port->next_port_in_aggregator = NULL;
1896 port->transaction_id = 0;
1897
1898 port->sm_churn_actor_timer_counter = 0;
1899 port->sm_churn_actor_state = 0;
1900 port->churn_actor_count = 0;
1901 port->sm_churn_partner_timer_counter = 0;
1902 port->sm_churn_partner_state = 0;
1903 port->churn_partner_count = 0;
1904
1905 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1906 }
1907}
1908
1909/**
1910 * ad_enable_collecting_distributing - enable a port's transmit/receive
1911 * @port: the port we're looking at
1912 * @update_slave_arr: Does slave array need update?
1913 *
1914 * Enable @port if it's in an active aggregator
1915 */
1916static void ad_enable_collecting_distributing(struct port *port,
1917 bool *update_slave_arr)
1918{
1919 if (port->aggregator->is_active) {
1920 slave_dbg(port->slave->bond->dev, port->slave->dev,
1921 "Enabling port %d (LAG %d)\n",
1922 port->actor_port_number,
1923 port->aggregator->aggregator_identifier);
1924 __enable_port(port);
1925 /* Slave array needs update */
1926 *update_slave_arr = true;
1927 }
1928}
1929
1930/**
1931 * ad_disable_collecting_distributing - disable a port's transmit/receive
1932 * @port: the port we're looking at
1933 * @update_slave_arr: Does slave array need update?
1934 */
1935static void ad_disable_collecting_distributing(struct port *port,
1936 bool *update_slave_arr)
1937{
1938 if (port->aggregator &&
1939 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1940 &(null_mac_addr))) {
1941 slave_dbg(port->slave->bond->dev, port->slave->dev,
1942 "Disabling port %d (LAG %d)\n",
1943 port->actor_port_number,
1944 port->aggregator->aggregator_identifier);
1945 __disable_port(port);
1946 /* Slave array needs an update */
1947 *update_slave_arr = true;
1948 }
1949}
1950
1951/**
1952 * ad_marker_info_received - handle receive of a Marker information frame
1953 * @marker_info: Marker info received
1954 * @port: the port we're looking at
1955 */
1956static void ad_marker_info_received(struct bond_marker *marker_info,
1957 struct port *port)
1958{
1959 struct bond_marker marker;
1960
1961 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);
1962 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);
1963
1964 /* copy the received marker data to the response marker */
1965 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1966 /* change the marker subtype to marker response */
1967 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1968
1969 /* send the marker response */
1970 if (ad_marker_send(port, &marker) >= 0)
1971 slave_dbg(port->slave->bond->dev, port->slave->dev,
1972 "Sent Marker Response on port %d\n",
1973 port->actor_port_number);
1974}
1975
1976/**
1977 * ad_marker_response_received - handle receive of a marker response frame
1978 * @marker: marker PDU received
1979 * @port: the port we're looking at
1980 *
1981 * This function does nothing since we decided not to implement send and handle
1982 * response for marker PDU's, in this stage, but only to respond to marker
1983 * information.
1984 */
1985static void ad_marker_response_received(struct bond_marker *marker,
1986 struct port *port)
1987{
1988 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);
1989 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);
1990
1991 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1992}
1993
1994/* ========= AD exported functions to the main bonding code ========= */
1995
1996/* Check aggregators status in team every T seconds */
1997#define AD_AGGREGATOR_SELECTION_TIMER 8
1998
1999/**
2000 * bond_3ad_initiate_agg_selection - initate aggregator selection
2001 * @bond: bonding struct
2002 * @timeout: timeout value to set
2003 *
2004 * Set the aggregation selection timer, to initiate an agg selection in
2005 * the very near future. Called during first initialization, and during
2006 * any down to up transitions of the bond.
2007 */
2008void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
2009{
2010 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);
2011}
2012
2013/**
2014 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
2015 * @bond: bonding struct to work on
2016 *
2017 * Can be called only after the mac address of the bond is set.
2018 */
2019void bond_3ad_initialize(struct bonding *bond)
2020{
2021 BOND_AD_INFO(bond).aggregator_identifier = 0;
2022 BOND_AD_INFO(bond).system.sys_priority =
2023 bond->params.ad_actor_sys_prio;
2024 if (is_zero_ether_addr(bond->params.ad_actor_system))
2025 BOND_AD_INFO(bond).system.sys_mac_addr =
2026 *((struct mac_addr *)bond->dev->dev_addr);
2027 else
2028 BOND_AD_INFO(bond).system.sys_mac_addr =
2029 *((struct mac_addr *)bond->params.ad_actor_system);
2030
2031 bond_3ad_initiate_agg_selection(bond,
2032 AD_AGGREGATOR_SELECTION_TIMER *
2033 ad_ticks_per_sec);
2034}
2035
2036/**
2037 * bond_3ad_bind_slave - initialize a slave's port
2038 * @slave: slave struct to work on
2039 *
2040 * Returns: 0 on success
2041 * < 0 on error
2042 */
2043void bond_3ad_bind_slave(struct slave *slave)
2044{
2045 struct bonding *bond = bond_get_bond_by_slave(slave);
2046 struct port *port;
2047 struct aggregator *aggregator;
2048
2049 /* check that the slave has not been initialized yet. */
2050 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
2051
2052 /* port initialization */
2053 port = &(SLAVE_AD_INFO(slave)->port);
2054
2055 ad_initialize_port(port, bond->params.lacp_fast);
2056
2057 port->slave = slave;
2058 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
2059 /* key is determined according to the link speed, duplex and
2060 * user key
2061 */
2062 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
2063 ad_update_actor_keys(port, false);
2064 /* actor system is the bond's system */
2065 __ad_actor_update_port(port);
2066 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
2067 * lacpdu's are sent in one second)
2068 */
2069 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
2070
2071 __disable_port(port);
2072
2073 /* aggregator initialization */
2074 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2075
2076 ad_initialize_agg(aggregator);
2077
2078 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2079 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2080 aggregator->slave = slave;
2081 aggregator->is_active = 0;
2082 aggregator->num_of_ports = 0;
2083 }
2084}
2085
2086/**
2087 * bond_3ad_unbind_slave - deinitialize a slave's port
2088 * @slave: slave struct to work on
2089 *
2090 * Search for the aggregator that is related to this port, remove the
2091 * aggregator and assign another aggregator for other port related to it
2092 * (if any), and remove the port.
2093 */
2094void bond_3ad_unbind_slave(struct slave *slave)
2095{
2096 struct port *port, *prev_port, *temp_port;
2097 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2098 int select_new_active_agg = 0;
2099 struct bonding *bond = slave->bond;
2100 struct slave *slave_iter;
2101 struct list_head *iter;
2102 bool dummy_slave_update; /* Ignore this value as caller updates array */
2103
2104 /* Sync against bond_3ad_state_machine_handler() */
2105 spin_lock_bh(&bond->mode_lock);
2106 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2107 port = &(SLAVE_AD_INFO(slave)->port);
2108
2109 /* if slave is null, the whole port is not initialized */
2110 if (!port->slave) {
2111 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");
2112 goto out;
2113 }
2114
2115 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",
2116 aggregator->aggregator_identifier);
2117
2118 /* Tell the partner that this port is not suitable for aggregation */
2119 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
2120 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
2121 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
2122 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION;
2123 __update_lacpdu_from_port(port);
2124 ad_lacpdu_send(port);
2125
2126 /* check if this aggregator is occupied */
2127 if (aggregator->lag_ports) {
2128 /* check if there are other ports related to this aggregator
2129 * except the port related to this slave(thats ensure us that
2130 * there is a reason to search for new aggregator, and that we
2131 * will find one
2132 */
2133 if ((aggregator->lag_ports != port) ||
2134 (aggregator->lag_ports->next_port_in_aggregator)) {
2135 /* find new aggregator for the related port(s) */
2136 bond_for_each_slave(bond, slave_iter, iter) {
2137 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2138 /* if the new aggregator is empty, or it is
2139 * connected to our port only
2140 */
2141 if (!new_aggregator->lag_ports ||
2142 ((new_aggregator->lag_ports == port) &&
2143 !new_aggregator->lag_ports->next_port_in_aggregator))
2144 break;
2145 }
2146 if (!slave_iter)
2147 new_aggregator = NULL;
2148
2149 /* if new aggregator found, copy the aggregator's
2150 * parameters and connect the related lag_ports to the
2151 * new aggregator
2152 */
2153 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2154 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2155 aggregator->aggregator_identifier,
2156 new_aggregator->aggregator_identifier);
2157
2158 if ((new_aggregator->lag_ports == port) &&
2159 new_aggregator->is_active) {
2160 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2161 select_new_active_agg = 1;
2162 }
2163
2164 new_aggregator->is_individual = aggregator->is_individual;
2165 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2166 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2167 new_aggregator->partner_system = aggregator->partner_system;
2168 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2169 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2170 new_aggregator->receive_state = aggregator->receive_state;
2171 new_aggregator->transmit_state = aggregator->transmit_state;
2172 new_aggregator->lag_ports = aggregator->lag_ports;
2173 new_aggregator->is_active = aggregator->is_active;
2174 new_aggregator->num_of_ports = aggregator->num_of_ports;
2175
2176 /* update the information that is written on
2177 * the ports about the aggregator
2178 */
2179 for (temp_port = aggregator->lag_ports; temp_port;
2180 temp_port = temp_port->next_port_in_aggregator) {
2181 temp_port->aggregator = new_aggregator;
2182 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2183 }
2184
2185 ad_clear_agg(aggregator);
2186
2187 if (select_new_active_agg)
2188 ad_agg_selection_logic(__get_first_agg(port),
2189 &dummy_slave_update);
2190 } else {
2191 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2192 }
2193 } else {
2194 /* in case that the only port related to this
2195 * aggregator is the one we want to remove
2196 */
2197 select_new_active_agg = aggregator->is_active;
2198 ad_clear_agg(aggregator);
2199 if (select_new_active_agg) {
2200 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2201 /* select new active aggregator */
2202 temp_aggregator = __get_first_agg(port);
2203 if (temp_aggregator)
2204 ad_agg_selection_logic(temp_aggregator,
2205 &dummy_slave_update);
2206 }
2207 }
2208 }
2209
2210 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);
2211
2212 /* find the aggregator that this port is connected to */
2213 bond_for_each_slave(bond, slave_iter, iter) {
2214 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2215 prev_port = NULL;
2216 /* search the port in the aggregator's related ports */
2217 for (temp_port = temp_aggregator->lag_ports; temp_port;
2218 prev_port = temp_port,
2219 temp_port = temp_port->next_port_in_aggregator) {
2220 if (temp_port == port) {
2221 /* the aggregator found - detach the port from
2222 * this aggregator
2223 */
2224 if (prev_port)
2225 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2226 else
2227 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2228 temp_aggregator->num_of_ports--;
2229 if (__agg_active_ports(temp_aggregator) == 0) {
2230 select_new_active_agg = temp_aggregator->is_active;
2231 if (temp_aggregator->num_of_ports == 0)
2232 ad_clear_agg(temp_aggregator);
2233 if (select_new_active_agg) {
2234 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2235 /* select new active aggregator */
2236 ad_agg_selection_logic(__get_first_agg(port),
2237 &dummy_slave_update);
2238 }
2239 }
2240 break;
2241 }
2242 }
2243 }
2244 port->slave = NULL;
2245
2246out:
2247 spin_unlock_bh(&bond->mode_lock);
2248}
2249
2250/**
2251 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2252 * @bond: bonding struct to work on
2253 *
2254 * If an ad_actor setting gets changed we need to update the individual port
2255 * settings so the bond device will use the new values when it gets upped.
2256 */
2257void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2258{
2259 struct list_head *iter;
2260 struct slave *slave;
2261
2262 ASSERT_RTNL();
2263
2264 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2265 if (is_zero_ether_addr(bond->params.ad_actor_system))
2266 BOND_AD_INFO(bond).system.sys_mac_addr =
2267 *((struct mac_addr *)bond->dev->dev_addr);
2268 else
2269 BOND_AD_INFO(bond).system.sys_mac_addr =
2270 *((struct mac_addr *)bond->params.ad_actor_system);
2271
2272 spin_lock_bh(&bond->mode_lock);
2273 bond_for_each_slave(bond, slave, iter) {
2274 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2275
2276 __ad_actor_update_port(port);
2277 port->ntt = true;
2278 }
2279 spin_unlock_bh(&bond->mode_lock);
2280}
2281
2282/**
2283 * bond_agg_timer_advance - advance agg_select_timer
2284 * @bond: bonding structure
2285 *
2286 * Return true when agg_select_timer reaches 0.
2287 */
2288static bool bond_agg_timer_advance(struct bonding *bond)
2289{
2290 int val, nval;
2291
2292 while (1) {
2293 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);
2294 if (!val)
2295 return false;
2296 nval = val - 1;
2297 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,
2298 val, nval) == val)
2299 break;
2300 }
2301 return nval == 0;
2302}
2303
2304/**
2305 * bond_3ad_state_machine_handler - handle state machines timeout
2306 * @work: work context to fetch bonding struct to work on from
2307 *
2308 * The state machine handling concept in this module is to check every tick
2309 * which state machine should operate any function. The execution order is
2310 * round robin, so when we have an interaction between state machines, the
2311 * reply of one to each other might be delayed until next tick.
2312 *
2313 * This function also complete the initialization when the agg_select_timer
2314 * times out, and it selects an aggregator for the ports that are yet not
2315 * related to any aggregator, and selects the active aggregator for a bond.
2316 */
2317void bond_3ad_state_machine_handler(struct work_struct *work)
2318{
2319 struct bonding *bond = container_of(work, struct bonding,
2320 ad_work.work);
2321 struct aggregator *aggregator;
2322 struct list_head *iter;
2323 struct slave *slave;
2324 struct port *port;
2325 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2326 bool update_slave_arr = false;
2327
2328 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2329 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2330 * concurrently due to incoming LACPDU as well.
2331 */
2332 spin_lock_bh(&bond->mode_lock);
2333 rcu_read_lock();
2334
2335 /* check if there are any slaves */
2336 if (!bond_has_slaves(bond))
2337 goto re_arm;
2338
2339 if (bond_agg_timer_advance(bond)) {
2340 slave = bond_first_slave_rcu(bond);
2341 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2342
2343 /* select the active aggregator for the bond */
2344 if (port) {
2345 if (!port->slave) {
2346 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2347 bond->dev->name);
2348 goto re_arm;
2349 }
2350
2351 aggregator = __get_first_agg(port);
2352 ad_agg_selection_logic(aggregator, &update_slave_arr);
2353 }
2354 bond_3ad_set_carrier(bond);
2355 }
2356
2357 /* for each port run the state machines */
2358 bond_for_each_slave_rcu(bond, slave, iter) {
2359 port = &(SLAVE_AD_INFO(slave)->port);
2360 if (!port->slave) {
2361 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2362 bond->dev->name);
2363 goto re_arm;
2364 }
2365
2366 ad_rx_machine(NULL, port);
2367 ad_periodic_machine(port, &bond->params);
2368 ad_port_selection_logic(port, &update_slave_arr);
2369 ad_mux_machine(port, &update_slave_arr);
2370 ad_tx_machine(port);
2371 ad_churn_machine(port);
2372
2373 /* turn off the BEGIN bit, since we already handled it */
2374 if (port->sm_vars & AD_PORT_BEGIN)
2375 port->sm_vars &= ~AD_PORT_BEGIN;
2376 }
2377
2378re_arm:
2379 bond_for_each_slave_rcu(bond, slave, iter) {
2380 if (slave->should_notify) {
2381 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2382 break;
2383 }
2384 }
2385 rcu_read_unlock();
2386 spin_unlock_bh(&bond->mode_lock);
2387
2388 if (update_slave_arr)
2389 bond_slave_arr_work_rearm(bond, 0);
2390
2391 if (should_notify_rtnl && rtnl_trylock()) {
2392 bond_slave_state_notify(bond);
2393 rtnl_unlock();
2394 }
2395 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2396}
2397
2398/**
2399 * bond_3ad_rx_indication - handle a received frame
2400 * @lacpdu: received lacpdu
2401 * @slave: slave struct to work on
2402 *
2403 * It is assumed that frames that were sent on this NIC don't returned as new
2404 * received frames (loopback). Since only the payload is given to this
2405 * function, it check for loopback.
2406 */
2407static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)
2408{
2409 struct bonding *bond = slave->bond;
2410 int ret = RX_HANDLER_ANOTHER;
2411 struct bond_marker *marker;
2412 struct port *port;
2413 atomic64_t *stat;
2414
2415 port = &(SLAVE_AD_INFO(slave)->port);
2416 if (!port->slave) {
2417 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2418 slave->dev->name, slave->bond->dev->name);
2419 return ret;
2420 }
2421
2422 switch (lacpdu->subtype) {
2423 case AD_TYPE_LACPDU:
2424 ret = RX_HANDLER_CONSUMED;
2425 slave_dbg(slave->bond->dev, slave->dev,
2426 "Received LACPDU on port %d\n",
2427 port->actor_port_number);
2428 /* Protect against concurrent state machines */
2429 spin_lock(&slave->bond->mode_lock);
2430 ad_rx_machine(lacpdu, port);
2431 spin_unlock(&slave->bond->mode_lock);
2432 break;
2433 case AD_TYPE_MARKER:
2434 ret = RX_HANDLER_CONSUMED;
2435 /* No need to convert fields to Little Endian since we
2436 * don't use the marker's fields.
2437 */
2438 marker = (struct bond_marker *)lacpdu;
2439 switch (marker->tlv_type) {
2440 case AD_MARKER_INFORMATION_SUBTYPE:
2441 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",
2442 port->actor_port_number);
2443 ad_marker_info_received(marker, port);
2444 break;
2445 case AD_MARKER_RESPONSE_SUBTYPE:
2446 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",
2447 port->actor_port_number);
2448 ad_marker_response_received(marker, port);
2449 break;
2450 default:
2451 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",
2452 port->actor_port_number);
2453 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;
2454 atomic64_inc(stat);
2455 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;
2456 atomic64_inc(stat);
2457 }
2458 break;
2459 default:
2460 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);
2461 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);
2462 }
2463
2464 return ret;
2465}
2466
2467/**
2468 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2469 * its current speed and duplex settings.
2470 *
2471 * @port: the port we'are looking at
2472 * @reset: Boolean to just reset the speed and the duplex part of the key
2473 *
2474 * The logic to change the oper / admin keys is:
2475 * (a) A full duplex port can participate in LACP with partner.
2476 * (b) When the speed is changed, LACP need to be reinitiated.
2477 */
2478static void ad_update_actor_keys(struct port *port, bool reset)
2479{
2480 u8 duplex = 0;
2481 u16 ospeed = 0, speed = 0;
2482 u16 old_oper_key = port->actor_oper_port_key;
2483
2484 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2485 if (!reset) {
2486 speed = __get_link_speed(port);
2487 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2488 duplex = __get_duplex(port);
2489 port->actor_admin_port_key |= (speed << 1) | duplex;
2490 }
2491 port->actor_oper_port_key = port->actor_admin_port_key;
2492
2493 if (old_oper_key != port->actor_oper_port_key) {
2494 /* Only 'duplex' port participates in LACP */
2495 if (duplex)
2496 port->sm_vars |= AD_PORT_LACP_ENABLED;
2497 else
2498 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2499
2500 if (!reset) {
2501 if (!speed) {
2502 slave_err(port->slave->bond->dev,
2503 port->slave->dev,
2504 "speed changed to 0 on port %d\n",
2505 port->actor_port_number);
2506 } else if (duplex && ospeed != speed) {
2507 /* Speed change restarts LACP state-machine */
2508 port->sm_vars |= AD_PORT_BEGIN;
2509 }
2510 }
2511 }
2512}
2513
2514/**
2515 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2516 * change indication
2517 *
2518 * @slave: slave struct to work on
2519 *
2520 * Handle reselection of aggregator (if needed) for this port.
2521 */
2522void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2523{
2524 struct port *port;
2525
2526 port = &(SLAVE_AD_INFO(slave)->port);
2527
2528 /* if slave is null, the whole port is not initialized */
2529 if (!port->slave) {
2530 slave_warn(slave->bond->dev, slave->dev,
2531 "speed/duplex changed for uninitialized port\n");
2532 return;
2533 }
2534
2535 spin_lock_bh(&slave->bond->mode_lock);
2536 ad_update_actor_keys(port, false);
2537 spin_unlock_bh(&slave->bond->mode_lock);
2538 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",
2539 port->actor_port_number);
2540}
2541
2542/**
2543 * bond_3ad_handle_link_change - handle a slave's link status change indication
2544 * @slave: slave struct to work on
2545 * @link: whether the link is now up or down
2546 *
2547 * Handle reselection of aggregator (if needed) for this port.
2548 */
2549void bond_3ad_handle_link_change(struct slave *slave, char link)
2550{
2551 struct aggregator *agg;
2552 struct port *port;
2553 bool dummy;
2554
2555 port = &(SLAVE_AD_INFO(slave)->port);
2556
2557 /* if slave is null, the whole port is not initialized */
2558 if (!port->slave) {
2559 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");
2560 return;
2561 }
2562
2563 spin_lock_bh(&slave->bond->mode_lock);
2564 /* on link down we are zeroing duplex and speed since
2565 * some of the adaptors(ce1000.lan) report full duplex/speed
2566 * instead of N/A(duplex) / 0(speed).
2567 *
2568 * on link up we are forcing recheck on the duplex and speed since
2569 * some of he adaptors(ce1000.lan) report.
2570 */
2571 if (link == BOND_LINK_UP) {
2572 port->is_enabled = true;
2573 ad_update_actor_keys(port, false);
2574 } else {
2575 /* link has failed */
2576 port->is_enabled = false;
2577 ad_update_actor_keys(port, true);
2578 }
2579 agg = __get_first_agg(port);
2580 ad_agg_selection_logic(agg, &dummy);
2581
2582 spin_unlock_bh(&slave->bond->mode_lock);
2583
2584 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",
2585 port->actor_port_number,
2586 link == BOND_LINK_UP ? "UP" : "DOWN");
2587
2588 /* RTNL is held and mode_lock is released so it's safe
2589 * to update slave_array here.
2590 */
2591 bond_update_slave_arr(slave->bond, NULL);
2592}
2593
2594/**
2595 * bond_3ad_set_carrier - set link state for bonding master
2596 * @bond: bonding structure
2597 *
2598 * if we have an active aggregator, we're up, if not, we're down.
2599 * Presumes that we cannot have an active aggregator if there are
2600 * no slaves with link up.
2601 *
2602 * This behavior complies with IEEE 802.3 section 43.3.9.
2603 *
2604 * Called by bond_set_carrier(). Return zero if carrier state does not
2605 * change, nonzero if it does.
2606 */
2607int bond_3ad_set_carrier(struct bonding *bond)
2608{
2609 struct aggregator *active;
2610 struct slave *first_slave;
2611 int ret = 1;
2612
2613 rcu_read_lock();
2614 first_slave = bond_first_slave_rcu(bond);
2615 if (!first_slave) {
2616 ret = 0;
2617 goto out;
2618 }
2619 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2620 if (active) {
2621 /* are enough slaves available to consider link up? */
2622 if (__agg_active_ports(active) < bond->params.min_links) {
2623 if (netif_carrier_ok(bond->dev)) {
2624 netif_carrier_off(bond->dev);
2625 goto out;
2626 }
2627 } else if (!netif_carrier_ok(bond->dev)) {
2628 netif_carrier_on(bond->dev);
2629 goto out;
2630 }
2631 } else if (netif_carrier_ok(bond->dev)) {
2632 netif_carrier_off(bond->dev);
2633 }
2634out:
2635 rcu_read_unlock();
2636 return ret;
2637}
2638
2639/**
2640 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2641 * @bond: bonding struct to work on
2642 * @ad_info: ad_info struct to fill with the bond's info
2643 *
2644 * Returns: 0 on success
2645 * < 0 on error
2646 */
2647int __bond_3ad_get_active_agg_info(struct bonding *bond,
2648 struct ad_info *ad_info)
2649{
2650 struct aggregator *aggregator = NULL;
2651 struct list_head *iter;
2652 struct slave *slave;
2653 struct port *port;
2654
2655 bond_for_each_slave_rcu(bond, slave, iter) {
2656 port = &(SLAVE_AD_INFO(slave)->port);
2657 if (port->aggregator && port->aggregator->is_active) {
2658 aggregator = port->aggregator;
2659 break;
2660 }
2661 }
2662
2663 if (!aggregator)
2664 return -1;
2665
2666 ad_info->aggregator_id = aggregator->aggregator_identifier;
2667 ad_info->ports = __agg_active_ports(aggregator);
2668 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2669 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2670 ether_addr_copy(ad_info->partner_system,
2671 aggregator->partner_system.mac_addr_value);
2672 return 0;
2673}
2674
2675int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2676{
2677 int ret;
2678
2679 rcu_read_lock();
2680 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2681 rcu_read_unlock();
2682
2683 return ret;
2684}
2685
2686int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2687 struct slave *slave)
2688{
2689 struct lacpdu *lacpdu, _lacpdu;
2690
2691 if (skb->protocol != PKT_TYPE_LACPDU)
2692 return RX_HANDLER_ANOTHER;
2693
2694 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2695 return RX_HANDLER_ANOTHER;
2696
2697 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2698 if (!lacpdu) {
2699 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);
2700 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);
2701 return RX_HANDLER_ANOTHER;
2702 }
2703
2704 return bond_3ad_rx_indication(lacpdu, slave);
2705}
2706
2707/**
2708 * bond_3ad_update_lacp_rate - change the lacp rate
2709 * @bond: bonding struct
2710 *
2711 * When modify lacp_rate parameter via sysfs,
2712 * update actor_oper_port_state of each port.
2713 *
2714 * Hold bond->mode_lock,
2715 * so we can modify port->actor_oper_port_state,
2716 * no matter bond is up or down.
2717 */
2718void bond_3ad_update_lacp_rate(struct bonding *bond)
2719{
2720 struct port *port = NULL;
2721 struct list_head *iter;
2722 struct slave *slave;
2723 int lacp_fast;
2724
2725 lacp_fast = bond->params.lacp_fast;
2726 spin_lock_bh(&bond->mode_lock);
2727 bond_for_each_slave(bond, slave, iter) {
2728 port = &(SLAVE_AD_INFO(slave)->port);
2729 if (lacp_fast)
2730 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
2731 else
2732 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT;
2733 }
2734 spin_unlock_bh(&bond->mode_lock);
2735}
2736
2737size_t bond_3ad_stats_size(void)
2738{
2739 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */
2740 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */
2741 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */
2742 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */
2743 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */
2744 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */
2745 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */
2746 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */
2747 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */
2748}
2749
2750int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)
2751{
2752 u64 val;
2753
2754 val = atomic64_read(&stats->lacpdu_rx);
2755 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,
2756 BOND_3AD_STAT_PAD))
2757 return -EMSGSIZE;
2758 val = atomic64_read(&stats->lacpdu_tx);
2759 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,
2760 BOND_3AD_STAT_PAD))
2761 return -EMSGSIZE;
2762 val = atomic64_read(&stats->lacpdu_unknown_rx);
2763 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,
2764 BOND_3AD_STAT_PAD))
2765 return -EMSGSIZE;
2766 val = atomic64_read(&stats->lacpdu_illegal_rx);
2767 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,
2768 BOND_3AD_STAT_PAD))
2769 return -EMSGSIZE;
2770
2771 val = atomic64_read(&stats->marker_rx);
2772 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,
2773 BOND_3AD_STAT_PAD))
2774 return -EMSGSIZE;
2775 val = atomic64_read(&stats->marker_tx);
2776 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,
2777 BOND_3AD_STAT_PAD))
2778 return -EMSGSIZE;
2779 val = atomic64_read(&stats->marker_resp_rx);
2780 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,
2781 BOND_3AD_STAT_PAD))
2782 return -EMSGSIZE;
2783 val = atomic64_read(&stats->marker_resp_tx);
2784 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,
2785 BOND_3AD_STAT_PAD))
2786 return -EMSGSIZE;
2787 val = atomic64_read(&stats->marker_unknown_rx);
2788 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,
2789 BOND_3AD_STAT_PAD))
2790 return -EMSGSIZE;
2791
2792 return 0;
2793}