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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 u16 ad_ticks_per_sec = 1000 / AD_TIMER_INTERVAL;
86static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
87
88const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = {
89 0x01, 0x80, 0xC2, 0x00, 0x00, 0x02
90};
91
92/* ================= main 802.3ad protocol functions ================== */
93static int ad_lacpdu_send(struct port *port);
94static int ad_marker_send(struct port *port, struct bond_marker *marker);
95static void ad_mux_machine(struct port *port, bool *update_slave_arr);
96static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
97static void ad_tx_machine(struct port *port);
98static void ad_periodic_machine(struct port *port, struct bond_params *bond_params);
99static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
100static void ad_agg_selection_logic(struct aggregator *aggregator,
101 bool *update_slave_arr);
102static void ad_clear_agg(struct aggregator *aggregator);
103static void ad_initialize_agg(struct aggregator *aggregator);
104static void ad_initialize_port(struct port *port, int lacp_fast);
105static void ad_enable_collecting(struct port *port);
106static void ad_disable_distributing(struct port *port,
107 bool *update_slave_arr);
108static void ad_enable_collecting_distributing(struct port *port,
109 bool *update_slave_arr);
110static void ad_disable_collecting_distributing(struct port *port,
111 bool *update_slave_arr);
112static void ad_marker_info_received(struct bond_marker *marker_info,
113 struct port *port);
114static void ad_marker_response_received(struct bond_marker *marker,
115 struct port *port);
116static void ad_update_actor_keys(struct port *port, bool reset);
117
118
119/* ================= api to bonding and kernel code ================== */
120
121/**
122 * __get_bond_by_port - get the port's bonding struct
123 * @port: the port we're looking at
124 *
125 * Return @port's bonding struct, or %NULL if it can't be found.
126 */
127static inline struct bonding *__get_bond_by_port(struct port *port)
128{
129 if (port->slave == NULL)
130 return NULL;
131
132 return bond_get_bond_by_slave(port->slave);
133}
134
135/**
136 * __get_first_agg - get the first aggregator in the bond
137 * @port: the port we're looking at
138 *
139 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
140 * found.
141 * The caller must hold RCU or RTNL lock.
142 */
143static inline struct aggregator *__get_first_agg(struct port *port)
144{
145 struct bonding *bond = __get_bond_by_port(port);
146 struct slave *first_slave;
147 struct aggregator *agg;
148
149 /* If there's no bond for this port, or bond has no slaves */
150 if (bond == NULL)
151 return NULL;
152
153 rcu_read_lock();
154 first_slave = bond_first_slave_rcu(bond);
155 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
156 rcu_read_unlock();
157
158 return agg;
159}
160
161/**
162 * __agg_has_partner - see if we have a partner
163 * @agg: the agregator we're looking at
164 *
165 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
166 * address for the partner). Return 0 if not.
167 */
168static inline int __agg_has_partner(struct aggregator *agg)
169{
170 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
171}
172
173/**
174 * __disable_distributing_port - disable the port's slave for distributing.
175 * Port will still be able to collect.
176 * @port: the port we're looking at
177 *
178 * This will disable only distributing on the port's slave.
179 */
180static void __disable_distributing_port(struct port *port)
181{
182 bond_set_slave_tx_disabled_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
183}
184
185/**
186 * __enable_collecting_port - enable the port's slave for collecting,
187 * if it's up
188 * @port: the port we're looking at
189 *
190 * This will enable only collecting on the port's slave.
191 */
192static void __enable_collecting_port(struct port *port)
193{
194 struct slave *slave = port->slave;
195
196 if (slave->link == BOND_LINK_UP && bond_slave_is_up(slave))
197 bond_set_slave_rx_enabled_flags(slave, BOND_SLAVE_NOTIFY_LATER);
198}
199
200/**
201 * __disable_port - disable the port's slave
202 * @port: the port we're looking at
203 *
204 * This will disable both collecting and distributing on the port's slave.
205 */
206static inline void __disable_port(struct port *port)
207{
208 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
209}
210
211/**
212 * __enable_port - enable the port's slave, if it's up
213 * @port: the port we're looking at
214 *
215 * This will enable both collecting and distributing on the port's slave.
216 */
217static inline void __enable_port(struct port *port)
218{
219 struct slave *slave = port->slave;
220
221 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
222 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
223}
224
225/**
226 * __port_move_to_attached_state - check if port should transition back to attached
227 * state.
228 * @port: the port we're looking at
229 */
230static bool __port_move_to_attached_state(struct port *port)
231{
232 if (!(port->sm_vars & AD_PORT_SELECTED) ||
233 (port->sm_vars & AD_PORT_STANDBY) ||
234 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||
235 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION))
236 port->sm_mux_state = AD_MUX_ATTACHED;
237
238 return port->sm_mux_state == AD_MUX_ATTACHED;
239}
240
241/**
242 * __port_is_collecting_distributing - check if the port's slave is in the
243 * combined collecting/distributing state
244 * @port: the port we're looking at
245 */
246static int __port_is_collecting_distributing(struct port *port)
247{
248 return bond_is_active_slave(port->slave);
249}
250
251/**
252 * __get_agg_selection_mode - get the aggregator selection mode
253 * @port: the port we're looking at
254 *
255 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
256 */
257static inline u32 __get_agg_selection_mode(struct port *port)
258{
259 struct bonding *bond = __get_bond_by_port(port);
260
261 if (bond == NULL)
262 return BOND_AD_STABLE;
263
264 return bond->params.ad_select;
265}
266
267/**
268 * __check_agg_selection_timer - check if the selection timer has expired
269 * @port: the port we're looking at
270 */
271static inline int __check_agg_selection_timer(struct port *port)
272{
273 struct bonding *bond = __get_bond_by_port(port);
274
275 if (bond == NULL)
276 return 0;
277
278 return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0;
279}
280
281/**
282 * __get_link_speed - get a port's speed
283 * @port: the port we're looking at
284 *
285 * Return @port's speed in 802.3ad enum format. i.e. one of:
286 * 0,
287 * %AD_LINK_SPEED_10MBPS,
288 * %AD_LINK_SPEED_100MBPS,
289 * %AD_LINK_SPEED_1000MBPS,
290 * %AD_LINK_SPEED_2500MBPS,
291 * %AD_LINK_SPEED_5000MBPS,
292 * %AD_LINK_SPEED_10000MBPS
293 * %AD_LINK_SPEED_14000MBPS,
294 * %AD_LINK_SPEED_20000MBPS
295 * %AD_LINK_SPEED_25000MBPS
296 * %AD_LINK_SPEED_40000MBPS
297 * %AD_LINK_SPEED_50000MBPS
298 * %AD_LINK_SPEED_56000MBPS
299 * %AD_LINK_SPEED_100000MBPS
300 * %AD_LINK_SPEED_200000MBPS
301 * %AD_LINK_SPEED_400000MBPS
302 * %AD_LINK_SPEED_800000MBPS
303 */
304static u16 __get_link_speed(struct port *port)
305{
306 struct slave *slave = port->slave;
307 u16 speed;
308
309 /* this if covers only a special case: when the configuration starts
310 * with link down, it sets the speed to 0.
311 * This is done in spite of the fact that the e100 driver reports 0
312 * to be compatible with MVT in the future.
313 */
314 if (slave->link != BOND_LINK_UP)
315 speed = 0;
316 else {
317 switch (slave->speed) {
318 case SPEED_10:
319 speed = AD_LINK_SPEED_10MBPS;
320 break;
321
322 case SPEED_100:
323 speed = AD_LINK_SPEED_100MBPS;
324 break;
325
326 case SPEED_1000:
327 speed = AD_LINK_SPEED_1000MBPS;
328 break;
329
330 case SPEED_2500:
331 speed = AD_LINK_SPEED_2500MBPS;
332 break;
333
334 case SPEED_5000:
335 speed = AD_LINK_SPEED_5000MBPS;
336 break;
337
338 case SPEED_10000:
339 speed = AD_LINK_SPEED_10000MBPS;
340 break;
341
342 case SPEED_14000:
343 speed = AD_LINK_SPEED_14000MBPS;
344 break;
345
346 case SPEED_20000:
347 speed = AD_LINK_SPEED_20000MBPS;
348 break;
349
350 case SPEED_25000:
351 speed = AD_LINK_SPEED_25000MBPS;
352 break;
353
354 case SPEED_40000:
355 speed = AD_LINK_SPEED_40000MBPS;
356 break;
357
358 case SPEED_50000:
359 speed = AD_LINK_SPEED_50000MBPS;
360 break;
361
362 case SPEED_56000:
363 speed = AD_LINK_SPEED_56000MBPS;
364 break;
365
366 case SPEED_100000:
367 speed = AD_LINK_SPEED_100000MBPS;
368 break;
369
370 case SPEED_200000:
371 speed = AD_LINK_SPEED_200000MBPS;
372 break;
373
374 case SPEED_400000:
375 speed = AD_LINK_SPEED_400000MBPS;
376 break;
377
378 case SPEED_800000:
379 speed = AD_LINK_SPEED_800000MBPS;
380 break;
381
382 default:
383 /* unknown speed value from ethtool. shouldn't happen */
384 if (slave->speed != SPEED_UNKNOWN)
385 pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",
386 slave->bond->dev->name,
387 slave->dev->name, slave->speed,
388 port->actor_port_number);
389 speed = 0;
390 break;
391 }
392 }
393
394 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n",
395 port->actor_port_number, speed);
396 return speed;
397}
398
399/**
400 * __get_duplex - get a port's duplex
401 * @port: the port we're looking at
402 *
403 * Return @port's duplex in 802.3ad bitmask format. i.e.:
404 * 0x01 if in full duplex
405 * 0x00 otherwise
406 */
407static u8 __get_duplex(struct port *port)
408{
409 struct slave *slave = port->slave;
410 u8 retval = 0x0;
411
412 /* handling a special case: when the configuration starts with
413 * link down, it sets the duplex to 0.
414 */
415 if (slave->link == BOND_LINK_UP) {
416 switch (slave->duplex) {
417 case DUPLEX_FULL:
418 retval = 0x1;
419 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",
420 port->actor_port_number);
421 break;
422 case DUPLEX_HALF:
423 default:
424 retval = 0x0;
425 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n",
426 port->actor_port_number);
427 break;
428 }
429 }
430 return retval;
431}
432
433static void __ad_actor_update_port(struct port *port)
434{
435 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
436
437 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
438 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
439}
440
441/* Conversions */
442
443/**
444 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
445 * @timer_type: which timer to operate
446 * @par: timer parameter. see below
447 *
448 * If @timer_type is %current_while_timer, @par indicates long/short timer.
449 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
450 * %SLOW_PERIODIC_TIME.
451 */
452static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
453{
454 u16 retval = 0; /* to silence the compiler */
455
456 switch (timer_type) {
457 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
458 if (par)
459 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
460 else
461 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
462 break;
463 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
464 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
465 break;
466 case AD_PERIODIC_TIMER: /* for periodic machine */
467 retval = (par*ad_ticks_per_sec); /* long timeout */
468 break;
469 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
470 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
471 break;
472 case AD_WAIT_WHILE_TIMER: /* for selection machine */
473 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
474 break;
475 }
476
477 return retval;
478}
479
480
481/* ================= ad_rx_machine helper functions ================== */
482
483/**
484 * __choose_matched - update a port's matched variable from a received lacpdu
485 * @lacpdu: the lacpdu we've received
486 * @port: the port we're looking at
487 *
488 * Update the value of the matched variable, using parameter values from a
489 * newly received lacpdu. Parameter values for the partner carried in the
490 * received PDU are compared with the corresponding operational parameter
491 * values for the actor. Matched is set to TRUE if all of these parameters
492 * match and the PDU parameter partner_state.aggregation has the same value as
493 * actor_oper_port_state.aggregation and lacp will actively maintain the link
494 * in the aggregation. Matched is also set to TRUE if the value of
495 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
496 * an individual link and lacp will actively maintain the link. Otherwise,
497 * matched is set to FALSE. LACP is considered to be actively maintaining the
498 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
499 * the actor's actor_oper_port_state.lacp_activity and the PDU's
500 * partner_state.lacp_activity variables are TRUE.
501 *
502 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
503 * used here to implement the language from 802.3ad 43.4.9 that requires
504 * recordPDU to "match" the LACPDU parameters to the stored values.
505 */
506static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
507{
508 /* check if all parameters are alike
509 * or this is individual link(aggregation == FALSE)
510 * then update the state machine Matched variable.
511 */
512 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
513 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
514 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
515 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
516 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
517 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) ||
518 ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0)
519 ) {
520 port->sm_vars |= AD_PORT_MATCHED;
521 } else {
522 port->sm_vars &= ~AD_PORT_MATCHED;
523 }
524}
525
526/**
527 * __record_pdu - record parameters from a received lacpdu
528 * @lacpdu: the lacpdu we've received
529 * @port: the port we're looking at
530 *
531 * Record the parameter values for the Actor carried in a received lacpdu as
532 * the current partner operational parameter values and sets
533 * actor_oper_port_state.defaulted to FALSE.
534 */
535static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
536{
537 if (lacpdu && port) {
538 struct port_params *partner = &port->partner_oper;
539
540 __choose_matched(lacpdu, port);
541 /* record the new parameter values for the partner
542 * operational
543 */
544 partner->port_number = ntohs(lacpdu->actor_port);
545 partner->port_priority = ntohs(lacpdu->actor_port_priority);
546 partner->system = lacpdu->actor_system;
547 partner->system_priority = ntohs(lacpdu->actor_system_priority);
548 partner->key = ntohs(lacpdu->actor_key);
549 partner->port_state = lacpdu->actor_state;
550
551 /* set actor_oper_port_state.defaulted to FALSE */
552 port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED;
553
554 /* set the partner sync. to on if the partner is sync,
555 * and the port is matched
556 */
557 if ((port->sm_vars & AD_PORT_MATCHED) &&
558 (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) {
559 partner->port_state |= LACP_STATE_SYNCHRONIZATION;
560 slave_dbg(port->slave->bond->dev, port->slave->dev,
561 "partner sync=1\n");
562 } else {
563 partner->port_state &= ~LACP_STATE_SYNCHRONIZATION;
564 slave_dbg(port->slave->bond->dev, port->slave->dev,
565 "partner sync=0\n");
566 }
567 }
568}
569
570/**
571 * __record_default - record default parameters
572 * @port: the port we're looking at
573 *
574 * This function records the default parameter values for the partner carried
575 * in the Partner Admin parameters as the current partner operational parameter
576 * values and sets actor_oper_port_state.defaulted to TRUE.
577 */
578static void __record_default(struct port *port)
579{
580 if (port) {
581 /* record the partner admin parameters */
582 memcpy(&port->partner_oper, &port->partner_admin,
583 sizeof(struct port_params));
584
585 /* set actor_oper_port_state.defaulted to true */
586 port->actor_oper_port_state |= LACP_STATE_DEFAULTED;
587 }
588}
589
590/**
591 * __update_selected - update a port's Selected variable from a received lacpdu
592 * @lacpdu: the lacpdu we've received
593 * @port: the port we're looking at
594 *
595 * Update the value of the selected variable, using parameter values from a
596 * newly received lacpdu. The parameter values for the Actor carried in the
597 * received PDU are compared with the corresponding operational parameter
598 * values for the ports partner. If one or more of the comparisons shows that
599 * the value(s) received in the PDU differ from the current operational values,
600 * then selected is set to FALSE and actor_oper_port_state.synchronization is
601 * set to out_of_sync. Otherwise, selected remains unchanged.
602 */
603static void __update_selected(struct lacpdu *lacpdu, struct port *port)
604{
605 if (lacpdu && port) {
606 const struct port_params *partner = &port->partner_oper;
607
608 /* check if any parameter is different then
609 * update the state machine selected variable.
610 */
611 if (ntohs(lacpdu->actor_port) != partner->port_number ||
612 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
613 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
614 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
615 ntohs(lacpdu->actor_key) != partner->key ||
616 (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) {
617 port->sm_vars &= ~AD_PORT_SELECTED;
618 }
619 }
620}
621
622/**
623 * __update_default_selected - update a port's Selected variable from Partner
624 * @port: the port we're looking at
625 *
626 * This function updates the value of the selected variable, using the partner
627 * administrative parameter values. The administrative values are compared with
628 * the corresponding operational parameter values for the partner. If one or
629 * more of the comparisons shows that the administrative value(s) differ from
630 * the current operational values, then Selected is set to FALSE and
631 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
632 * Selected remains unchanged.
633 */
634static void __update_default_selected(struct port *port)
635{
636 if (port) {
637 const struct port_params *admin = &port->partner_admin;
638 const struct port_params *oper = &port->partner_oper;
639
640 /* check if any parameter is different then
641 * update the state machine selected variable.
642 */
643 if (admin->port_number != oper->port_number ||
644 admin->port_priority != oper->port_priority ||
645 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
646 admin->system_priority != oper->system_priority ||
647 admin->key != oper->key ||
648 (admin->port_state & LACP_STATE_AGGREGATION)
649 != (oper->port_state & LACP_STATE_AGGREGATION)) {
650 port->sm_vars &= ~AD_PORT_SELECTED;
651 }
652 }
653}
654
655/**
656 * __update_ntt - update a port's ntt variable from a received lacpdu
657 * @lacpdu: the lacpdu we've received
658 * @port: the port we're looking at
659 *
660 * Updates the value of the ntt variable, using parameter values from a newly
661 * received lacpdu. The parameter values for the partner carried in the
662 * received PDU are compared with the corresponding operational parameter
663 * values for the Actor. If one or more of the comparisons shows that the
664 * value(s) received in the PDU differ from the current operational values,
665 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
666 */
667static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
668{
669 /* validate lacpdu and port */
670 if (lacpdu && port) {
671 /* check if any parameter is different then
672 * update the port->ntt.
673 */
674 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
675 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
676 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
677 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
678 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
679 ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) ||
680 ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) ||
681 ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) ||
682 ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION))
683 ) {
684 port->ntt = true;
685 }
686 }
687}
688
689/**
690 * __agg_ports_are_ready - check if all ports in an aggregator are ready
691 * @aggregator: the aggregator we're looking at
692 *
693 */
694static int __agg_ports_are_ready(struct aggregator *aggregator)
695{
696 struct port *port;
697 int retval = 1;
698
699 if (aggregator) {
700 /* scan all ports in this aggregator to verfy if they are
701 * all ready.
702 */
703 for (port = aggregator->lag_ports;
704 port;
705 port = port->next_port_in_aggregator) {
706 if (!(port->sm_vars & AD_PORT_READY_N)) {
707 retval = 0;
708 break;
709 }
710 }
711 }
712
713 return retval;
714}
715
716/**
717 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
718 * @aggregator: the aggregator we're looking at
719 * @val: Should the ports' ready bit be set on or off
720 *
721 */
722static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
723{
724 struct port *port;
725
726 for (port = aggregator->lag_ports; port;
727 port = port->next_port_in_aggregator) {
728 if (val)
729 port->sm_vars |= AD_PORT_READY;
730 else
731 port->sm_vars &= ~AD_PORT_READY;
732 }
733}
734
735static int __agg_active_ports(struct aggregator *agg)
736{
737 struct port *port;
738 int active = 0;
739
740 for (port = agg->lag_ports; port;
741 port = port->next_port_in_aggregator) {
742 if (port->is_enabled)
743 active++;
744 }
745
746 return active;
747}
748
749/**
750 * __get_agg_bandwidth - get the total bandwidth of an aggregator
751 * @aggregator: the aggregator we're looking at
752 *
753 */
754static u32 __get_agg_bandwidth(struct aggregator *aggregator)
755{
756 int nports = __agg_active_ports(aggregator);
757 u32 bandwidth = 0;
758
759 if (nports) {
760 switch (__get_link_speed(aggregator->lag_ports)) {
761 case AD_LINK_SPEED_1MBPS:
762 bandwidth = nports;
763 break;
764 case AD_LINK_SPEED_10MBPS:
765 bandwidth = nports * 10;
766 break;
767 case AD_LINK_SPEED_100MBPS:
768 bandwidth = nports * 100;
769 break;
770 case AD_LINK_SPEED_1000MBPS:
771 bandwidth = nports * 1000;
772 break;
773 case AD_LINK_SPEED_2500MBPS:
774 bandwidth = nports * 2500;
775 break;
776 case AD_LINK_SPEED_5000MBPS:
777 bandwidth = nports * 5000;
778 break;
779 case AD_LINK_SPEED_10000MBPS:
780 bandwidth = nports * 10000;
781 break;
782 case AD_LINK_SPEED_14000MBPS:
783 bandwidth = nports * 14000;
784 break;
785 case AD_LINK_SPEED_20000MBPS:
786 bandwidth = nports * 20000;
787 break;
788 case AD_LINK_SPEED_25000MBPS:
789 bandwidth = nports * 25000;
790 break;
791 case AD_LINK_SPEED_40000MBPS:
792 bandwidth = nports * 40000;
793 break;
794 case AD_LINK_SPEED_50000MBPS:
795 bandwidth = nports * 50000;
796 break;
797 case AD_LINK_SPEED_56000MBPS:
798 bandwidth = nports * 56000;
799 break;
800 case AD_LINK_SPEED_100000MBPS:
801 bandwidth = nports * 100000;
802 break;
803 case AD_LINK_SPEED_200000MBPS:
804 bandwidth = nports * 200000;
805 break;
806 case AD_LINK_SPEED_400000MBPS:
807 bandwidth = nports * 400000;
808 break;
809 case AD_LINK_SPEED_800000MBPS:
810 bandwidth = nports * 800000;
811 break;
812 default:
813 bandwidth = 0; /* to silence the compiler */
814 }
815 }
816 return bandwidth;
817}
818
819/**
820 * __get_active_agg - get the current active aggregator
821 * @aggregator: the aggregator we're looking at
822 *
823 * Caller must hold RCU lock.
824 */
825static struct aggregator *__get_active_agg(struct aggregator *aggregator)
826{
827 struct bonding *bond = aggregator->slave->bond;
828 struct list_head *iter;
829 struct slave *slave;
830
831 bond_for_each_slave_rcu(bond, slave, iter)
832 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
833 return &(SLAVE_AD_INFO(slave)->aggregator);
834
835 return NULL;
836}
837
838/**
839 * __update_lacpdu_from_port - update a port's lacpdu fields
840 * @port: the port we're looking at
841 */
842static inline void __update_lacpdu_from_port(struct port *port)
843{
844 struct lacpdu *lacpdu = &port->lacpdu;
845 const struct port_params *partner = &port->partner_oper;
846
847 /* update current actual Actor parameters
848 * lacpdu->subtype initialized
849 * lacpdu->version_number initialized
850 * lacpdu->tlv_type_actor_info initialized
851 * lacpdu->actor_information_length initialized
852 */
853
854 lacpdu->actor_system_priority = htons(port->actor_system_priority);
855 lacpdu->actor_system = port->actor_system;
856 lacpdu->actor_key = htons(port->actor_oper_port_key);
857 lacpdu->actor_port_priority = htons(port->actor_port_priority);
858 lacpdu->actor_port = htons(port->actor_port_number);
859 lacpdu->actor_state = port->actor_oper_port_state;
860 slave_dbg(port->slave->bond->dev, port->slave->dev,
861 "update lacpdu: actor port state %x\n",
862 port->actor_oper_port_state);
863
864 /* lacpdu->reserved_3_1 initialized
865 * lacpdu->tlv_type_partner_info initialized
866 * lacpdu->partner_information_length initialized
867 */
868
869 lacpdu->partner_system_priority = htons(partner->system_priority);
870 lacpdu->partner_system = partner->system;
871 lacpdu->partner_key = htons(partner->key);
872 lacpdu->partner_port_priority = htons(partner->port_priority);
873 lacpdu->partner_port = htons(partner->port_number);
874 lacpdu->partner_state = partner->port_state;
875
876 /* lacpdu->reserved_3_2 initialized
877 * lacpdu->tlv_type_collector_info initialized
878 * lacpdu->collector_information_length initialized
879 * collector_max_delay initialized
880 * reserved_12[12] initialized
881 * tlv_type_terminator initialized
882 * terminator_length initialized
883 * reserved_50[50] initialized
884 */
885}
886
887/* ================= main 802.3ad protocol code ========================= */
888
889/**
890 * ad_lacpdu_send - send out a lacpdu packet on a given port
891 * @port: the port we're looking at
892 *
893 * Returns: 0 on success
894 * < 0 on error
895 */
896static int ad_lacpdu_send(struct port *port)
897{
898 struct slave *slave = port->slave;
899 struct sk_buff *skb;
900 struct lacpdu_header *lacpdu_header;
901 int length = sizeof(struct lacpdu_header);
902
903 skb = dev_alloc_skb(length);
904 if (!skb)
905 return -ENOMEM;
906
907 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);
908 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);
909
910 skb->dev = slave->dev;
911 skb_reset_mac_header(skb);
912 skb->network_header = skb->mac_header + ETH_HLEN;
913 skb->protocol = PKT_TYPE_LACPDU;
914 skb->priority = TC_PRIO_CONTROL;
915
916 lacpdu_header = skb_put(skb, length);
917
918 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
919 /* Note: source address is set to be the member's PERMANENT address,
920 * because we use it to identify loopback lacpdus in receive.
921 */
922 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
923 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
924
925 lacpdu_header->lacpdu = port->lacpdu;
926
927 dev_queue_xmit(skb);
928
929 return 0;
930}
931
932/**
933 * ad_marker_send - send marker information/response on a given port
934 * @port: the port we're looking at
935 * @marker: marker data to send
936 *
937 * Returns: 0 on success
938 * < 0 on error
939 */
940static int ad_marker_send(struct port *port, struct bond_marker *marker)
941{
942 struct slave *slave = port->slave;
943 struct sk_buff *skb;
944 struct bond_marker_header *marker_header;
945 int length = sizeof(struct bond_marker_header);
946
947 skb = dev_alloc_skb(length + 16);
948 if (!skb)
949 return -ENOMEM;
950
951 switch (marker->tlv_type) {
952 case AD_MARKER_INFORMATION_SUBTYPE:
953 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);
954 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);
955 break;
956 case AD_MARKER_RESPONSE_SUBTYPE:
957 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);
958 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);
959 break;
960 }
961
962 skb_reserve(skb, 16);
963
964 skb->dev = slave->dev;
965 skb_reset_mac_header(skb);
966 skb->network_header = skb->mac_header + ETH_HLEN;
967 skb->protocol = PKT_TYPE_LACPDU;
968
969 marker_header = skb_put(skb, length);
970
971 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
972 /* Note: source address is set to be the member's PERMANENT address,
973 * because we use it to identify loopback MARKERs in receive.
974 */
975 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
976 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
977
978 marker_header->marker = *marker;
979
980 dev_queue_xmit(skb);
981
982 return 0;
983}
984
985/**
986 * ad_mux_machine - handle a port's mux state machine
987 * @port: the port we're looking at
988 * @update_slave_arr: Does slave array need update?
989 */
990static void ad_mux_machine(struct port *port, bool *update_slave_arr)
991{
992 struct bonding *bond = __get_bond_by_port(port);
993 mux_states_t last_state;
994
995 /* keep current State Machine state to compare later if it was
996 * changed
997 */
998 last_state = port->sm_mux_state;
999
1000 if (port->sm_vars & AD_PORT_BEGIN) {
1001 port->sm_mux_state = AD_MUX_DETACHED;
1002 } else {
1003 switch (port->sm_mux_state) {
1004 case AD_MUX_DETACHED:
1005 if ((port->sm_vars & AD_PORT_SELECTED)
1006 || (port->sm_vars & AD_PORT_STANDBY))
1007 /* if SELECTED or STANDBY */
1008 port->sm_mux_state = AD_MUX_WAITING;
1009 break;
1010 case AD_MUX_WAITING:
1011 /* if SELECTED == FALSE return to DETACH state */
1012 if (!(port->sm_vars & AD_PORT_SELECTED)) {
1013 port->sm_vars &= ~AD_PORT_READY_N;
1014 /* in order to withhold the Selection Logic to
1015 * check all ports READY_N value every callback
1016 * cycle to update ready variable, we check
1017 * READY_N and update READY here
1018 */
1019 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1020 port->sm_mux_state = AD_MUX_DETACHED;
1021 break;
1022 }
1023
1024 /* check if the wait_while_timer expired */
1025 if (port->sm_mux_timer_counter
1026 && !(--port->sm_mux_timer_counter))
1027 port->sm_vars |= AD_PORT_READY_N;
1028
1029 /* in order to withhold the selection logic to check
1030 * all ports READY_N value every callback cycle to
1031 * update ready variable, we check READY_N and update
1032 * READY here
1033 */
1034 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1035
1036 /* if the wait_while_timer expired, and the port is
1037 * in READY state, move to ATTACHED state
1038 */
1039 if ((port->sm_vars & AD_PORT_READY)
1040 && !port->sm_mux_timer_counter)
1041 port->sm_mux_state = AD_MUX_ATTACHED;
1042 break;
1043 case AD_MUX_ATTACHED:
1044 /* check also if agg_select_timer expired (so the
1045 * edable port will take place only after this timer)
1046 */
1047 if ((port->sm_vars & AD_PORT_SELECTED) &&
1048 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&
1049 !__check_agg_selection_timer(port)) {
1050 if (port->aggregator->is_active) {
1051 int state = AD_MUX_COLLECTING_DISTRIBUTING;
1052
1053 if (!bond->params.coupled_control)
1054 state = AD_MUX_COLLECTING;
1055 port->sm_mux_state = state;
1056 }
1057 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
1058 (port->sm_vars & AD_PORT_STANDBY)) {
1059 /* if UNSELECTED or STANDBY */
1060 port->sm_vars &= ~AD_PORT_READY_N;
1061 /* in order to withhold the selection logic to
1062 * check all ports READY_N value every callback
1063 * cycle to update ready variable, we check
1064 * READY_N and update READY here
1065 */
1066 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1067 port->sm_mux_state = AD_MUX_DETACHED;
1068 } else if (port->aggregator->is_active) {
1069 port->actor_oper_port_state |=
1070 LACP_STATE_SYNCHRONIZATION;
1071 }
1072 break;
1073 case AD_MUX_COLLECTING_DISTRIBUTING:
1074 if (!__port_move_to_attached_state(port)) {
1075 /* if port state hasn't changed make
1076 * sure that a collecting distributing
1077 * port in an active aggregator is enabled
1078 */
1079 if (port->aggregator->is_active &&
1080 !__port_is_collecting_distributing(port)) {
1081 __enable_port(port);
1082 *update_slave_arr = true;
1083 }
1084 }
1085 break;
1086 case AD_MUX_COLLECTING:
1087 if (!__port_move_to_attached_state(port)) {
1088 if ((port->sm_vars & AD_PORT_SELECTED) &&
1089 (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) &&
1090 (port->partner_oper.port_state & LACP_STATE_COLLECTING)) {
1091 port->sm_mux_state = AD_MUX_DISTRIBUTING;
1092 } else {
1093 /* If port state hasn't changed, make sure that a collecting
1094 * port is enabled for an active aggregator.
1095 */
1096 struct slave *slave = port->slave;
1097
1098 if (port->aggregator->is_active &&
1099 bond_is_slave_rx_disabled(slave)) {
1100 ad_enable_collecting(port);
1101 *update_slave_arr = true;
1102 }
1103 }
1104 }
1105 break;
1106 case AD_MUX_DISTRIBUTING:
1107 if (!(port->sm_vars & AD_PORT_SELECTED) ||
1108 (port->sm_vars & AD_PORT_STANDBY) ||
1109 !(port->partner_oper.port_state & LACP_STATE_COLLECTING) ||
1110 !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) ||
1111 !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) {
1112 port->sm_mux_state = AD_MUX_COLLECTING;
1113 } else {
1114 /* if port state hasn't changed make
1115 * sure that a collecting distributing
1116 * port in an active aggregator is enabled
1117 */
1118 if (port->aggregator &&
1119 port->aggregator->is_active &&
1120 !__port_is_collecting_distributing(port)) {
1121 __enable_port(port);
1122 *update_slave_arr = true;
1123 }
1124 }
1125 break;
1126 default:
1127 break;
1128 }
1129 }
1130
1131 /* check if the state machine was changed */
1132 if (port->sm_mux_state != last_state) {
1133 slave_dbg(port->slave->bond->dev, port->slave->dev,
1134 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
1135 port->actor_port_number,
1136 last_state,
1137 port->sm_mux_state);
1138 switch (port->sm_mux_state) {
1139 case AD_MUX_DETACHED:
1140 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
1141 ad_disable_collecting_distributing(port,
1142 update_slave_arr);
1143 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
1144 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
1145 port->ntt = true;
1146 break;
1147 case AD_MUX_WAITING:
1148 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1149 break;
1150 case AD_MUX_ATTACHED:
1151 if (port->aggregator->is_active)
1152 port->actor_oper_port_state |=
1153 LACP_STATE_SYNCHRONIZATION;
1154 else
1155 port->actor_oper_port_state &=
1156 ~LACP_STATE_SYNCHRONIZATION;
1157 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
1158 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
1159 ad_disable_collecting_distributing(port,
1160 update_slave_arr);
1161 port->ntt = true;
1162 break;
1163 case AD_MUX_COLLECTING_DISTRIBUTING:
1164 port->actor_oper_port_state |= LACP_STATE_COLLECTING;
1165 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;
1166 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;
1167 ad_enable_collecting_distributing(port,
1168 update_slave_arr);
1169 port->ntt = true;
1170 break;
1171 case AD_MUX_COLLECTING:
1172 port->actor_oper_port_state |= LACP_STATE_COLLECTING;
1173 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
1174 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;
1175 ad_enable_collecting(port);
1176 ad_disable_distributing(port, update_slave_arr);
1177 port->ntt = true;
1178 break;
1179 case AD_MUX_DISTRIBUTING:
1180 port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING;
1181 port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION;
1182 ad_enable_collecting_distributing(port,
1183 update_slave_arr);
1184 break;
1185 default:
1186 break;
1187 }
1188 }
1189}
1190
1191/**
1192 * ad_rx_machine - handle a port's rx State Machine
1193 * @lacpdu: the lacpdu we've received
1194 * @port: the port we're looking at
1195 *
1196 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1197 * CURRENT. If timer expired set the state machine in the proper state.
1198 * In other cases, this function checks if we need to switch to other state.
1199 */
1200static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1201{
1202 rx_states_t last_state;
1203
1204 /* keep current State Machine state to compare later if it was
1205 * changed
1206 */
1207 last_state = port->sm_rx_state;
1208
1209 if (lacpdu) {
1210 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx);
1211 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx);
1212 }
1213 /* check if state machine should change state */
1214
1215 /* first, check if port was reinitialized */
1216 if (port->sm_vars & AD_PORT_BEGIN) {
1217 port->sm_rx_state = AD_RX_INITIALIZE;
1218 port->sm_vars |= AD_PORT_CHURNED;
1219 /* check if port is not enabled */
1220 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
1221 port->sm_rx_state = AD_RX_PORT_DISABLED;
1222 /* check if new lacpdu arrived */
1223 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1224 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1225 (port->sm_rx_state == AD_RX_CURRENT))) {
1226 if (port->sm_rx_state != AD_RX_CURRENT)
1227 port->sm_vars |= AD_PORT_CHURNED;
1228 port->sm_rx_timer_counter = 0;
1229 port->sm_rx_state = AD_RX_CURRENT;
1230 } else {
1231 /* if timer is on, and if it is expired */
1232 if (port->sm_rx_timer_counter &&
1233 !(--port->sm_rx_timer_counter)) {
1234 switch (port->sm_rx_state) {
1235 case AD_RX_EXPIRED:
1236 port->sm_rx_state = AD_RX_DEFAULTED;
1237 break;
1238 case AD_RX_CURRENT:
1239 port->sm_rx_state = AD_RX_EXPIRED;
1240 break;
1241 default:
1242 break;
1243 }
1244 } else {
1245 /* if no lacpdu arrived and no timer is on */
1246 switch (port->sm_rx_state) {
1247 case AD_RX_PORT_DISABLED:
1248 if (port->is_enabled &&
1249 (port->sm_vars & AD_PORT_LACP_ENABLED))
1250 port->sm_rx_state = AD_RX_EXPIRED;
1251 else if (port->is_enabled
1252 && ((port->sm_vars
1253 & AD_PORT_LACP_ENABLED) == 0))
1254 port->sm_rx_state = AD_RX_LACP_DISABLED;
1255 break;
1256 default:
1257 break;
1258
1259 }
1260 }
1261 }
1262
1263 /* check if the State machine was changed or new lacpdu arrived */
1264 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1265 slave_dbg(port->slave->bond->dev, port->slave->dev,
1266 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1267 port->actor_port_number,
1268 last_state,
1269 port->sm_rx_state);
1270 switch (port->sm_rx_state) {
1271 case AD_RX_INITIALIZE:
1272 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1273 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1274 else
1275 port->sm_vars |= AD_PORT_LACP_ENABLED;
1276 port->sm_vars &= ~AD_PORT_SELECTED;
1277 __record_default(port);
1278 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1279 port->sm_rx_state = AD_RX_PORT_DISABLED;
1280
1281 fallthrough;
1282 case AD_RX_PORT_DISABLED:
1283 port->sm_vars &= ~AD_PORT_MATCHED;
1284 break;
1285 case AD_RX_LACP_DISABLED:
1286 port->sm_vars &= ~AD_PORT_SELECTED;
1287 __record_default(port);
1288 port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION;
1289 port->sm_vars |= AD_PORT_MATCHED;
1290 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1291 break;
1292 case AD_RX_EXPIRED:
1293 /* Reset of the Synchronization flag (Standard 43.4.12)
1294 * This reset cause to disable this port in the
1295 * COLLECTING_DISTRIBUTING state of the mux machine in
1296 * case of EXPIRED even if LINK_DOWN didn't arrive for
1297 * the port.
1298 */
1299 port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION;
1300 port->sm_vars &= ~AD_PORT_MATCHED;
1301 port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT;
1302 port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY;
1303 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1304 port->actor_oper_port_state |= LACP_STATE_EXPIRED;
1305 port->sm_vars |= AD_PORT_CHURNED;
1306 break;
1307 case AD_RX_DEFAULTED:
1308 __update_default_selected(port);
1309 __record_default(port);
1310 port->sm_vars |= AD_PORT_MATCHED;
1311 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1312 break;
1313 case AD_RX_CURRENT:
1314 /* detect loopback situation */
1315 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1316 &(port->actor_system))) {
1317 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n"
1318 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n");
1319 return;
1320 }
1321 __update_selected(lacpdu, port);
1322 __update_ntt(lacpdu, port);
1323 __record_pdu(lacpdu, port);
1324 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT));
1325 port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
1326 break;
1327 default:
1328 break;
1329 }
1330 }
1331}
1332
1333/**
1334 * ad_churn_machine - handle port churn's state machine
1335 * @port: the port we're looking at
1336 *
1337 */
1338static void ad_churn_machine(struct port *port)
1339{
1340 if (port->sm_vars & AD_PORT_CHURNED) {
1341 port->sm_vars &= ~AD_PORT_CHURNED;
1342 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1343 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1344 port->sm_churn_actor_timer_counter =
1345 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1346 port->sm_churn_partner_timer_counter =
1347 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1348 return;
1349 }
1350 if (port->sm_churn_actor_timer_counter &&
1351 !(--port->sm_churn_actor_timer_counter) &&
1352 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1353 if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) {
1354 port->sm_churn_actor_state = AD_NO_CHURN;
1355 } else {
1356 port->churn_actor_count++;
1357 port->sm_churn_actor_state = AD_CHURN;
1358 }
1359 }
1360 if (port->sm_churn_partner_timer_counter &&
1361 !(--port->sm_churn_partner_timer_counter) &&
1362 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1363 if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) {
1364 port->sm_churn_partner_state = AD_NO_CHURN;
1365 } else {
1366 port->churn_partner_count++;
1367 port->sm_churn_partner_state = AD_CHURN;
1368 }
1369 }
1370}
1371
1372/**
1373 * ad_tx_machine - handle a port's tx state machine
1374 * @port: the port we're looking at
1375 */
1376static void ad_tx_machine(struct port *port)
1377{
1378 /* check if tx timer expired, to verify that we do not send more than
1379 * 3 packets per second
1380 */
1381 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1382 /* check if there is something to send */
1383 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1384 __update_lacpdu_from_port(port);
1385
1386 if (ad_lacpdu_send(port) >= 0) {
1387 slave_dbg(port->slave->bond->dev,
1388 port->slave->dev,
1389 "Sent LACPDU on port %d\n",
1390 port->actor_port_number);
1391
1392 /* mark ntt as false, so it will not be sent
1393 * again until demanded
1394 */
1395 port->ntt = false;
1396 }
1397 }
1398 /* restart tx timer(to verify that we will not exceed
1399 * AD_MAX_TX_IN_SECOND
1400 */
1401 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1402 }
1403}
1404
1405/**
1406 * ad_periodic_machine - handle a port's periodic state machine
1407 * @port: the port we're looking at
1408 * @bond_params: bond parameters we will use
1409 *
1410 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1411 */
1412static void ad_periodic_machine(struct port *port, struct bond_params *bond_params)
1413{
1414 periodic_states_t last_state;
1415
1416 /* keep current state machine state to compare later if it was changed */
1417 last_state = port->sm_periodic_state;
1418
1419 /* check if port was reinitialized */
1420 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1421 (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) ||
1422 !bond_params->lacp_active) {
1423 port->sm_periodic_state = AD_NO_PERIODIC;
1424 }
1425 /* check if state machine should change state */
1426 else if (port->sm_periodic_timer_counter) {
1427 /* check if periodic state machine expired */
1428 if (!(--port->sm_periodic_timer_counter)) {
1429 /* if expired then do tx */
1430 port->sm_periodic_state = AD_PERIODIC_TX;
1431 } else {
1432 /* If not expired, check if there is some new timeout
1433 * parameter from the partner state
1434 */
1435 switch (port->sm_periodic_state) {
1436 case AD_FAST_PERIODIC:
1437 if (!(port->partner_oper.port_state
1438 & LACP_STATE_LACP_TIMEOUT))
1439 port->sm_periodic_state = AD_SLOW_PERIODIC;
1440 break;
1441 case AD_SLOW_PERIODIC:
1442 if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) {
1443 port->sm_periodic_timer_counter = 0;
1444 port->sm_periodic_state = AD_PERIODIC_TX;
1445 }
1446 break;
1447 default:
1448 break;
1449 }
1450 }
1451 } else {
1452 switch (port->sm_periodic_state) {
1453 case AD_NO_PERIODIC:
1454 port->sm_periodic_state = AD_FAST_PERIODIC;
1455 break;
1456 case AD_PERIODIC_TX:
1457 if (!(port->partner_oper.port_state &
1458 LACP_STATE_LACP_TIMEOUT))
1459 port->sm_periodic_state = AD_SLOW_PERIODIC;
1460 else
1461 port->sm_periodic_state = AD_FAST_PERIODIC;
1462 break;
1463 default:
1464 break;
1465 }
1466 }
1467
1468 /* check if the state machine was changed */
1469 if (port->sm_periodic_state != last_state) {
1470 slave_dbg(port->slave->bond->dev, port->slave->dev,
1471 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1472 port->actor_port_number, last_state,
1473 port->sm_periodic_state);
1474 switch (port->sm_periodic_state) {
1475 case AD_NO_PERIODIC:
1476 port->sm_periodic_timer_counter = 0;
1477 break;
1478 case AD_FAST_PERIODIC:
1479 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1480 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1481 break;
1482 case AD_SLOW_PERIODIC:
1483 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1484 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1485 break;
1486 case AD_PERIODIC_TX:
1487 port->ntt = true;
1488 break;
1489 default:
1490 break;
1491 }
1492 }
1493}
1494
1495/**
1496 * ad_port_selection_logic - select aggregation groups
1497 * @port: the port we're looking at
1498 * @update_slave_arr: Does slave array need update?
1499 *
1500 * Select aggregation groups, and assign each port for it's aggregetor. The
1501 * selection logic is called in the inititalization (after all the handshkes),
1502 * and after every lacpdu receive (if selected is off).
1503 */
1504static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1505{
1506 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1507 struct port *last_port = NULL, *curr_port;
1508 struct list_head *iter;
1509 struct bonding *bond;
1510 struct slave *slave;
1511 int found = 0;
1512
1513 /* if the port is already Selected, do nothing */
1514 if (port->sm_vars & AD_PORT_SELECTED)
1515 return;
1516
1517 bond = __get_bond_by_port(port);
1518
1519 /* if the port is connected to other aggregator, detach it */
1520 if (port->aggregator) {
1521 /* detach the port from its former aggregator */
1522 temp_aggregator = port->aggregator;
1523 for (curr_port = temp_aggregator->lag_ports; curr_port;
1524 last_port = curr_port,
1525 curr_port = curr_port->next_port_in_aggregator) {
1526 if (curr_port == port) {
1527 temp_aggregator->num_of_ports--;
1528 /* if it is the first port attached to the
1529 * aggregator
1530 */
1531 if (!last_port) {
1532 temp_aggregator->lag_ports =
1533 port->next_port_in_aggregator;
1534 } else {
1535 /* not the first port attached to the
1536 * aggregator
1537 */
1538 last_port->next_port_in_aggregator =
1539 port->next_port_in_aggregator;
1540 }
1541
1542 /* clear the port's relations to this
1543 * aggregator
1544 */
1545 port->aggregator = NULL;
1546 port->next_port_in_aggregator = NULL;
1547 port->actor_port_aggregator_identifier = 0;
1548
1549 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n",
1550 port->actor_port_number,
1551 temp_aggregator->aggregator_identifier);
1552 /* if the aggregator is empty, clear its
1553 * parameters, and set it ready to be attached
1554 */
1555 if (!temp_aggregator->lag_ports)
1556 ad_clear_agg(temp_aggregator);
1557 break;
1558 }
1559 }
1560 if (!curr_port) {
1561 /* meaning: the port was related to an aggregator
1562 * but was not on the aggregator port list
1563 */
1564 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n",
1565 port->slave->bond->dev->name,
1566 port->slave->dev->name,
1567 port->actor_port_number,
1568 port->aggregator->aggregator_identifier);
1569 }
1570 }
1571 /* search on all aggregators for a suitable aggregator for this port */
1572 bond_for_each_slave(bond, slave, iter) {
1573 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1574
1575 /* keep a free aggregator for later use(if needed) */
1576 if (!aggregator->lag_ports) {
1577 if (!free_aggregator)
1578 free_aggregator = aggregator;
1579 continue;
1580 }
1581 /* check if current aggregator suits us */
1582 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1583 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1584 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1585 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1586 ) &&
1587 ((__agg_has_partner(aggregator) && /* partner answers */
1588 !aggregator->is_individual) /* but is not individual OR */
1589 )
1590 ) {
1591 /* attach to the founded aggregator */
1592 port->aggregator = aggregator;
1593 port->actor_port_aggregator_identifier =
1594 port->aggregator->aggregator_identifier;
1595 port->next_port_in_aggregator = aggregator->lag_ports;
1596 port->aggregator->num_of_ports++;
1597 aggregator->lag_ports = port;
1598 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n",
1599 port->actor_port_number,
1600 port->aggregator->aggregator_identifier);
1601
1602 /* mark this port as selected */
1603 port->sm_vars |= AD_PORT_SELECTED;
1604 found = 1;
1605 break;
1606 }
1607 }
1608
1609 /* the port couldn't find an aggregator - attach it to a new
1610 * aggregator
1611 */
1612 if (!found) {
1613 if (free_aggregator) {
1614 /* assign port a new aggregator */
1615 port->aggregator = free_aggregator;
1616 port->actor_port_aggregator_identifier =
1617 port->aggregator->aggregator_identifier;
1618
1619 /* update the new aggregator's parameters
1620 * if port was responsed from the end-user
1621 */
1622 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1623 /* if port is full duplex */
1624 port->aggregator->is_individual = false;
1625 else
1626 port->aggregator->is_individual = true;
1627
1628 port->aggregator->actor_admin_aggregator_key =
1629 port->actor_admin_port_key;
1630 port->aggregator->actor_oper_aggregator_key =
1631 port->actor_oper_port_key;
1632 port->aggregator->partner_system =
1633 port->partner_oper.system;
1634 port->aggregator->partner_system_priority =
1635 port->partner_oper.system_priority;
1636 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1637 port->aggregator->receive_state = 1;
1638 port->aggregator->transmit_state = 1;
1639 port->aggregator->lag_ports = port;
1640 port->aggregator->num_of_ports++;
1641
1642 /* mark this port as selected */
1643 port->sm_vars |= AD_PORT_SELECTED;
1644
1645 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n",
1646 port->actor_port_number,
1647 port->aggregator->aggregator_identifier);
1648 } else {
1649 slave_err(bond->dev, port->slave->dev,
1650 "Port %d did not find a suitable aggregator\n",
1651 port->actor_port_number);
1652 return;
1653 }
1654 }
1655 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1656 * in all aggregator's ports, else set ready=FALSE in all
1657 * aggregator's ports
1658 */
1659 __set_agg_ports_ready(port->aggregator,
1660 __agg_ports_are_ready(port->aggregator));
1661
1662 aggregator = __get_first_agg(port);
1663 ad_agg_selection_logic(aggregator, update_slave_arr);
1664
1665 if (!port->aggregator->is_active)
1666 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
1667}
1668
1669/* Decide if "agg" is a better choice for the new active aggregator that
1670 * the current best, according to the ad_select policy.
1671 */
1672static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1673 struct aggregator *curr)
1674{
1675 /* 0. If no best, select current.
1676 *
1677 * 1. If the current agg is not individual, and the best is
1678 * individual, select current.
1679 *
1680 * 2. If current agg is individual and the best is not, keep best.
1681 *
1682 * 3. Therefore, current and best are both individual or both not
1683 * individual, so:
1684 *
1685 * 3a. If current agg partner replied, and best agg partner did not,
1686 * select current.
1687 *
1688 * 3b. If current agg partner did not reply and best agg partner
1689 * did reply, keep best.
1690 *
1691 * 4. Therefore, current and best both have partner replies or
1692 * both do not, so perform selection policy:
1693 *
1694 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1695 * select by bandwidth.
1696 *
1697 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1698 */
1699 if (!best)
1700 return curr;
1701
1702 if (!curr->is_individual && best->is_individual)
1703 return curr;
1704
1705 if (curr->is_individual && !best->is_individual)
1706 return best;
1707
1708 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1709 return curr;
1710
1711 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1712 return best;
1713
1714 switch (__get_agg_selection_mode(curr->lag_ports)) {
1715 case BOND_AD_COUNT:
1716 if (__agg_active_ports(curr) > __agg_active_ports(best))
1717 return curr;
1718
1719 if (__agg_active_ports(curr) < __agg_active_ports(best))
1720 return best;
1721
1722 fallthrough;
1723 case BOND_AD_STABLE:
1724 case BOND_AD_BANDWIDTH:
1725 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1726 return curr;
1727
1728 break;
1729
1730 default:
1731 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n",
1732 curr->slave->bond->dev->name,
1733 curr->slave->dev->name,
1734 __get_agg_selection_mode(curr->lag_ports));
1735 break;
1736 }
1737
1738 return best;
1739}
1740
1741static int agg_device_up(const struct aggregator *agg)
1742{
1743 struct port *port = agg->lag_ports;
1744
1745 if (!port)
1746 return 0;
1747
1748 for (port = agg->lag_ports; port;
1749 port = port->next_port_in_aggregator) {
1750 if (netif_running(port->slave->dev) &&
1751 netif_carrier_ok(port->slave->dev))
1752 return 1;
1753 }
1754
1755 return 0;
1756}
1757
1758/**
1759 * ad_agg_selection_logic - select an aggregation group for a team
1760 * @agg: the aggregator we're looking at
1761 * @update_slave_arr: Does slave array need update?
1762 *
1763 * It is assumed that only one aggregator may be selected for a team.
1764 *
1765 * The logic of this function is to select the aggregator according to
1766 * the ad_select policy:
1767 *
1768 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1769 * it, and to reselect the active aggregator only if the previous
1770 * aggregator has no more ports related to it.
1771 *
1772 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1773 * bandwidth, and reselect whenever a link state change takes place or the
1774 * set of slaves in the bond changes.
1775 *
1776 * BOND_AD_COUNT: select the aggregator with largest number of ports
1777 * (slaves), and reselect whenever a link state change takes place or the
1778 * set of slaves in the bond changes.
1779 *
1780 * FIXME: this function MUST be called with the first agg in the bond, or
1781 * __get_active_agg() won't work correctly. This function should be better
1782 * called with the bond itself, and retrieve the first agg from it.
1783 */
1784static void ad_agg_selection_logic(struct aggregator *agg,
1785 bool *update_slave_arr)
1786{
1787 struct aggregator *best, *active, *origin;
1788 struct bonding *bond = agg->slave->bond;
1789 struct list_head *iter;
1790 struct slave *slave;
1791 struct port *port;
1792
1793 rcu_read_lock();
1794 origin = agg;
1795 active = __get_active_agg(agg);
1796 best = (active && agg_device_up(active)) ? active : NULL;
1797
1798 bond_for_each_slave_rcu(bond, slave, iter) {
1799 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1800
1801 agg->is_active = 0;
1802
1803 if (__agg_active_ports(agg) && agg_device_up(agg))
1804 best = ad_agg_selection_test(best, agg);
1805 }
1806
1807 if (best &&
1808 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1809 /* For the STABLE policy, don't replace the old active
1810 * aggregator if it's still active (it has an answering
1811 * partner) or if both the best and active don't have an
1812 * answering partner.
1813 */
1814 if (active && active->lag_ports &&
1815 __agg_active_ports(active) &&
1816 (__agg_has_partner(active) ||
1817 (!__agg_has_partner(active) &&
1818 !__agg_has_partner(best)))) {
1819 if (!(!active->actor_oper_aggregator_key &&
1820 best->actor_oper_aggregator_key)) {
1821 best = NULL;
1822 active->is_active = 1;
1823 }
1824 }
1825 }
1826
1827 if (best && (best == active)) {
1828 best = NULL;
1829 active->is_active = 1;
1830 }
1831
1832 /* if there is new best aggregator, activate it */
1833 if (best) {
1834 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1835 best->slave ? best->slave->dev->name : "NULL",
1836 best->aggregator_identifier, best->num_of_ports,
1837 best->actor_oper_aggregator_key,
1838 best->partner_oper_aggregator_key,
1839 best->is_individual, best->is_active);
1840 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n",
1841 best->slave ? best->slave->dev->name : "NULL",
1842 best->lag_ports, best->slave);
1843
1844 bond_for_each_slave_rcu(bond, slave, iter) {
1845 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1846
1847 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1848 agg->aggregator_identifier, agg->num_of_ports,
1849 agg->actor_oper_aggregator_key,
1850 agg->partner_oper_aggregator_key,
1851 agg->is_individual, agg->is_active);
1852 }
1853
1854 /* check if any partner replies */
1855 if (best->is_individual)
1856 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1857 bond->dev->name);
1858
1859 best->is_active = 1;
1860 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n",
1861 best->slave ? best->slave->dev->name : "NULL",
1862 best->aggregator_identifier);
1863 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1864 best->slave ? best->slave->dev->name : "NULL",
1865 best->aggregator_identifier, best->num_of_ports,
1866 best->actor_oper_aggregator_key,
1867 best->partner_oper_aggregator_key,
1868 best->is_individual, best->is_active);
1869
1870 /* disable the ports that were related to the former
1871 * active_aggregator
1872 */
1873 if (active) {
1874 for (port = active->lag_ports; port;
1875 port = port->next_port_in_aggregator) {
1876 __disable_port(port);
1877 }
1878 }
1879 /* Slave array needs update. */
1880 *update_slave_arr = true;
1881 }
1882
1883 /* if the selected aggregator is of join individuals
1884 * (partner_system is NULL), enable their ports
1885 */
1886 active = __get_active_agg(origin);
1887
1888 if (active) {
1889 if (!__agg_has_partner(active)) {
1890 for (port = active->lag_ports; port;
1891 port = port->next_port_in_aggregator) {
1892 __enable_port(port);
1893 }
1894 *update_slave_arr = true;
1895 }
1896 }
1897
1898 rcu_read_unlock();
1899
1900 bond_3ad_set_carrier(bond);
1901}
1902
1903/**
1904 * ad_clear_agg - clear a given aggregator's parameters
1905 * @aggregator: the aggregator we're looking at
1906 */
1907static void ad_clear_agg(struct aggregator *aggregator)
1908{
1909 if (aggregator) {
1910 aggregator->is_individual = false;
1911 aggregator->actor_admin_aggregator_key = 0;
1912 aggregator->actor_oper_aggregator_key = 0;
1913 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1914 aggregator->partner_system_priority = 0;
1915 aggregator->partner_oper_aggregator_key = 0;
1916 aggregator->receive_state = 0;
1917 aggregator->transmit_state = 0;
1918 aggregator->lag_ports = NULL;
1919 aggregator->is_active = 0;
1920 aggregator->num_of_ports = 0;
1921 pr_debug("%s: LAG %d was cleared\n",
1922 aggregator->slave ?
1923 aggregator->slave->dev->name : "NULL",
1924 aggregator->aggregator_identifier);
1925 }
1926}
1927
1928/**
1929 * ad_initialize_agg - initialize a given aggregator's parameters
1930 * @aggregator: the aggregator we're looking at
1931 */
1932static void ad_initialize_agg(struct aggregator *aggregator)
1933{
1934 if (aggregator) {
1935 ad_clear_agg(aggregator);
1936
1937 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1938 aggregator->aggregator_identifier = 0;
1939 aggregator->slave = NULL;
1940 }
1941}
1942
1943/**
1944 * ad_initialize_port - initialize a given port's parameters
1945 * @port: the port we're looking at
1946 * @lacp_fast: boolean. whether fast periodic should be used
1947 */
1948static void ad_initialize_port(struct port *port, int lacp_fast)
1949{
1950 static const struct port_params tmpl = {
1951 .system_priority = 0xffff,
1952 .key = 1,
1953 .port_number = 1,
1954 .port_priority = 0xff,
1955 .port_state = 1,
1956 };
1957 static const struct lacpdu lacpdu = {
1958 .subtype = 0x01,
1959 .version_number = 0x01,
1960 .tlv_type_actor_info = 0x01,
1961 .actor_information_length = 0x14,
1962 .tlv_type_partner_info = 0x02,
1963 .partner_information_length = 0x14,
1964 .tlv_type_collector_info = 0x03,
1965 .collector_information_length = 0x10,
1966 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1967 };
1968
1969 if (port) {
1970 port->actor_port_priority = 0xff;
1971 port->actor_port_aggregator_identifier = 0;
1972 port->ntt = false;
1973 port->actor_admin_port_state = LACP_STATE_AGGREGATION |
1974 LACP_STATE_LACP_ACTIVITY;
1975 port->actor_oper_port_state = LACP_STATE_AGGREGATION |
1976 LACP_STATE_LACP_ACTIVITY;
1977
1978 if (lacp_fast)
1979 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
1980
1981 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1982 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1983
1984 port->is_enabled = true;
1985 /* private parameters */
1986 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1987 port->sm_rx_state = 0;
1988 port->sm_rx_timer_counter = 0;
1989 port->sm_periodic_state = 0;
1990 port->sm_periodic_timer_counter = 0;
1991 port->sm_mux_state = 0;
1992 port->sm_mux_timer_counter = 0;
1993 port->sm_tx_state = 0;
1994 port->aggregator = NULL;
1995 port->next_port_in_aggregator = NULL;
1996 port->transaction_id = 0;
1997
1998 port->sm_churn_actor_timer_counter = 0;
1999 port->sm_churn_actor_state = 0;
2000 port->churn_actor_count = 0;
2001 port->sm_churn_partner_timer_counter = 0;
2002 port->sm_churn_partner_state = 0;
2003 port->churn_partner_count = 0;
2004
2005 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
2006 }
2007}
2008
2009/**
2010 * ad_enable_collecting - enable a port's receive
2011 * @port: the port we're looking at
2012 *
2013 * Enable @port if it's in an active aggregator
2014 */
2015static void ad_enable_collecting(struct port *port)
2016{
2017 if (port->aggregator->is_active) {
2018 struct slave *slave = port->slave;
2019
2020 slave_dbg(slave->bond->dev, slave->dev,
2021 "Enabling collecting on port %d (LAG %d)\n",
2022 port->actor_port_number,
2023 port->aggregator->aggregator_identifier);
2024 __enable_collecting_port(port);
2025 }
2026}
2027
2028/**
2029 * ad_disable_distributing - disable a port's transmit
2030 * @port: the port we're looking at
2031 * @update_slave_arr: Does slave array need update?
2032 */
2033static void ad_disable_distributing(struct port *port, bool *update_slave_arr)
2034{
2035 if (port->aggregator && __agg_has_partner(port->aggregator)) {
2036 slave_dbg(port->slave->bond->dev, port->slave->dev,
2037 "Disabling distributing on port %d (LAG %d)\n",
2038 port->actor_port_number,
2039 port->aggregator->aggregator_identifier);
2040 __disable_distributing_port(port);
2041 /* Slave array needs an update */
2042 *update_slave_arr = true;
2043 }
2044}
2045
2046/**
2047 * ad_enable_collecting_distributing - enable a port's transmit/receive
2048 * @port: the port we're looking at
2049 * @update_slave_arr: Does slave array need update?
2050 *
2051 * Enable @port if it's in an active aggregator
2052 */
2053static void ad_enable_collecting_distributing(struct port *port,
2054 bool *update_slave_arr)
2055{
2056 if (port->aggregator->is_active) {
2057 slave_dbg(port->slave->bond->dev, port->slave->dev,
2058 "Enabling port %d (LAG %d)\n",
2059 port->actor_port_number,
2060 port->aggregator->aggregator_identifier);
2061 __enable_port(port);
2062 /* Slave array needs update */
2063 *update_slave_arr = true;
2064 }
2065}
2066
2067/**
2068 * ad_disable_collecting_distributing - disable a port's transmit/receive
2069 * @port: the port we're looking at
2070 * @update_slave_arr: Does slave array need update?
2071 */
2072static void ad_disable_collecting_distributing(struct port *port,
2073 bool *update_slave_arr)
2074{
2075 if (port->aggregator && __agg_has_partner(port->aggregator)) {
2076 slave_dbg(port->slave->bond->dev, port->slave->dev,
2077 "Disabling port %d (LAG %d)\n",
2078 port->actor_port_number,
2079 port->aggregator->aggregator_identifier);
2080 __disable_port(port);
2081 /* Slave array needs an update */
2082 *update_slave_arr = true;
2083 }
2084}
2085
2086/**
2087 * ad_marker_info_received - handle receive of a Marker information frame
2088 * @marker_info: Marker info received
2089 * @port: the port we're looking at
2090 */
2091static void ad_marker_info_received(struct bond_marker *marker_info,
2092 struct port *port)
2093{
2094 struct bond_marker marker;
2095
2096 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);
2097 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);
2098
2099 /* copy the received marker data to the response marker */
2100 memcpy(&marker, marker_info, sizeof(struct bond_marker));
2101 /* change the marker subtype to marker response */
2102 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
2103
2104 /* send the marker response */
2105 if (ad_marker_send(port, &marker) >= 0)
2106 slave_dbg(port->slave->bond->dev, port->slave->dev,
2107 "Sent Marker Response on port %d\n",
2108 port->actor_port_number);
2109}
2110
2111/**
2112 * ad_marker_response_received - handle receive of a marker response frame
2113 * @marker: marker PDU received
2114 * @port: the port we're looking at
2115 *
2116 * This function does nothing since we decided not to implement send and handle
2117 * response for marker PDU's, in this stage, but only to respond to marker
2118 * information.
2119 */
2120static void ad_marker_response_received(struct bond_marker *marker,
2121 struct port *port)
2122{
2123 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);
2124 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);
2125
2126 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
2127}
2128
2129/* ========= AD exported functions to the main bonding code ========= */
2130
2131/* Check aggregators status in team every T seconds */
2132#define AD_AGGREGATOR_SELECTION_TIMER 8
2133
2134/**
2135 * bond_3ad_initiate_agg_selection - initate aggregator selection
2136 * @bond: bonding struct
2137 * @timeout: timeout value to set
2138 *
2139 * Set the aggregation selection timer, to initiate an agg selection in
2140 * the very near future. Called during first initialization, and during
2141 * any down to up transitions of the bond.
2142 */
2143void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
2144{
2145 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);
2146}
2147
2148/**
2149 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
2150 * @bond: bonding struct to work on
2151 *
2152 * Can be called only after the mac address of the bond is set.
2153 */
2154void bond_3ad_initialize(struct bonding *bond)
2155{
2156 BOND_AD_INFO(bond).aggregator_identifier = 0;
2157 BOND_AD_INFO(bond).system.sys_priority =
2158 bond->params.ad_actor_sys_prio;
2159 if (is_zero_ether_addr(bond->params.ad_actor_system))
2160 BOND_AD_INFO(bond).system.sys_mac_addr =
2161 *((struct mac_addr *)bond->dev->dev_addr);
2162 else
2163 BOND_AD_INFO(bond).system.sys_mac_addr =
2164 *((struct mac_addr *)bond->params.ad_actor_system);
2165
2166 bond_3ad_initiate_agg_selection(bond,
2167 AD_AGGREGATOR_SELECTION_TIMER *
2168 ad_ticks_per_sec);
2169}
2170
2171/**
2172 * bond_3ad_bind_slave - initialize a slave's port
2173 * @slave: slave struct to work on
2174 *
2175 * Returns: 0 on success
2176 * < 0 on error
2177 */
2178void bond_3ad_bind_slave(struct slave *slave)
2179{
2180 struct bonding *bond = bond_get_bond_by_slave(slave);
2181 struct port *port;
2182 struct aggregator *aggregator;
2183
2184 /* check that the slave has not been initialized yet. */
2185 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
2186
2187 /* port initialization */
2188 port = &(SLAVE_AD_INFO(slave)->port);
2189
2190 ad_initialize_port(port, bond->params.lacp_fast);
2191
2192 port->slave = slave;
2193 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
2194 /* key is determined according to the link speed, duplex and
2195 * user key
2196 */
2197 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
2198 ad_update_actor_keys(port, false);
2199 /* actor system is the bond's system */
2200 __ad_actor_update_port(port);
2201 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
2202 * lacpdu's are sent in one second)
2203 */
2204 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
2205
2206 __disable_port(port);
2207
2208 /* aggregator initialization */
2209 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2210
2211 ad_initialize_agg(aggregator);
2212
2213 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2214 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2215 aggregator->slave = slave;
2216 aggregator->is_active = 0;
2217 aggregator->num_of_ports = 0;
2218 }
2219}
2220
2221/**
2222 * bond_3ad_unbind_slave - deinitialize a slave's port
2223 * @slave: slave struct to work on
2224 *
2225 * Search for the aggregator that is related to this port, remove the
2226 * aggregator and assign another aggregator for other port related to it
2227 * (if any), and remove the port.
2228 */
2229void bond_3ad_unbind_slave(struct slave *slave)
2230{
2231 struct port *port, *prev_port, *temp_port;
2232 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2233 int select_new_active_agg = 0;
2234 struct bonding *bond = slave->bond;
2235 struct slave *slave_iter;
2236 struct list_head *iter;
2237 bool dummy_slave_update; /* Ignore this value as caller updates array */
2238
2239 /* Sync against bond_3ad_state_machine_handler() */
2240 spin_lock_bh(&bond->mode_lock);
2241 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2242 port = &(SLAVE_AD_INFO(slave)->port);
2243
2244 /* if slave is null, the whole port is not initialized */
2245 if (!port->slave) {
2246 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");
2247 goto out;
2248 }
2249
2250 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",
2251 aggregator->aggregator_identifier);
2252
2253 /* Tell the partner that this port is not suitable for aggregation */
2254 port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION;
2255 port->actor_oper_port_state &= ~LACP_STATE_COLLECTING;
2256 port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING;
2257 port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION;
2258 __update_lacpdu_from_port(port);
2259 ad_lacpdu_send(port);
2260
2261 /* check if this aggregator is occupied */
2262 if (aggregator->lag_ports) {
2263 /* check if there are other ports related to this aggregator
2264 * except the port related to this slave(thats ensure us that
2265 * there is a reason to search for new aggregator, and that we
2266 * will find one
2267 */
2268 if ((aggregator->lag_ports != port) ||
2269 (aggregator->lag_ports->next_port_in_aggregator)) {
2270 /* find new aggregator for the related port(s) */
2271 bond_for_each_slave(bond, slave_iter, iter) {
2272 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2273 /* if the new aggregator is empty, or it is
2274 * connected to our port only
2275 */
2276 if (!new_aggregator->lag_ports ||
2277 ((new_aggregator->lag_ports == port) &&
2278 !new_aggregator->lag_ports->next_port_in_aggregator))
2279 break;
2280 }
2281 if (!slave_iter)
2282 new_aggregator = NULL;
2283
2284 /* if new aggregator found, copy the aggregator's
2285 * parameters and connect the related lag_ports to the
2286 * new aggregator
2287 */
2288 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2289 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2290 aggregator->aggregator_identifier,
2291 new_aggregator->aggregator_identifier);
2292
2293 if ((new_aggregator->lag_ports == port) &&
2294 new_aggregator->is_active) {
2295 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2296 select_new_active_agg = 1;
2297 }
2298
2299 new_aggregator->is_individual = aggregator->is_individual;
2300 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2301 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2302 new_aggregator->partner_system = aggregator->partner_system;
2303 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2304 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2305 new_aggregator->receive_state = aggregator->receive_state;
2306 new_aggregator->transmit_state = aggregator->transmit_state;
2307 new_aggregator->lag_ports = aggregator->lag_ports;
2308 new_aggregator->is_active = aggregator->is_active;
2309 new_aggregator->num_of_ports = aggregator->num_of_ports;
2310
2311 /* update the information that is written on
2312 * the ports about the aggregator
2313 */
2314 for (temp_port = aggregator->lag_ports; temp_port;
2315 temp_port = temp_port->next_port_in_aggregator) {
2316 temp_port->aggregator = new_aggregator;
2317 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2318 }
2319
2320 ad_clear_agg(aggregator);
2321
2322 if (select_new_active_agg)
2323 ad_agg_selection_logic(__get_first_agg(port),
2324 &dummy_slave_update);
2325 } else {
2326 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2327 }
2328 } else {
2329 /* in case that the only port related to this
2330 * aggregator is the one we want to remove
2331 */
2332 select_new_active_agg = aggregator->is_active;
2333 ad_clear_agg(aggregator);
2334 if (select_new_active_agg) {
2335 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2336 /* select new active aggregator */
2337 temp_aggregator = __get_first_agg(port);
2338 if (temp_aggregator)
2339 ad_agg_selection_logic(temp_aggregator,
2340 &dummy_slave_update);
2341 }
2342 }
2343 }
2344
2345 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);
2346
2347 /* find the aggregator that this port is connected to */
2348 bond_for_each_slave(bond, slave_iter, iter) {
2349 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2350 prev_port = NULL;
2351 /* search the port in the aggregator's related ports */
2352 for (temp_port = temp_aggregator->lag_ports; temp_port;
2353 prev_port = temp_port,
2354 temp_port = temp_port->next_port_in_aggregator) {
2355 if (temp_port == port) {
2356 /* the aggregator found - detach the port from
2357 * this aggregator
2358 */
2359 if (prev_port)
2360 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2361 else
2362 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2363 temp_aggregator->num_of_ports--;
2364 if (__agg_active_ports(temp_aggregator) == 0) {
2365 select_new_active_agg = temp_aggregator->is_active;
2366 if (temp_aggregator->num_of_ports == 0)
2367 ad_clear_agg(temp_aggregator);
2368 if (select_new_active_agg) {
2369 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2370 /* select new active aggregator */
2371 ad_agg_selection_logic(__get_first_agg(port),
2372 &dummy_slave_update);
2373 }
2374 }
2375 break;
2376 }
2377 }
2378 }
2379 port->slave = NULL;
2380
2381out:
2382 spin_unlock_bh(&bond->mode_lock);
2383}
2384
2385/**
2386 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2387 * @bond: bonding struct to work on
2388 *
2389 * If an ad_actor setting gets changed we need to update the individual port
2390 * settings so the bond device will use the new values when it gets upped.
2391 */
2392void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2393{
2394 struct list_head *iter;
2395 struct slave *slave;
2396
2397 ASSERT_RTNL();
2398
2399 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2400 if (is_zero_ether_addr(bond->params.ad_actor_system))
2401 BOND_AD_INFO(bond).system.sys_mac_addr =
2402 *((struct mac_addr *)bond->dev->dev_addr);
2403 else
2404 BOND_AD_INFO(bond).system.sys_mac_addr =
2405 *((struct mac_addr *)bond->params.ad_actor_system);
2406
2407 spin_lock_bh(&bond->mode_lock);
2408 bond_for_each_slave(bond, slave, iter) {
2409 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2410
2411 __ad_actor_update_port(port);
2412 port->ntt = true;
2413 }
2414 spin_unlock_bh(&bond->mode_lock);
2415}
2416
2417/**
2418 * bond_agg_timer_advance - advance agg_select_timer
2419 * @bond: bonding structure
2420 *
2421 * Return true when agg_select_timer reaches 0.
2422 */
2423static bool bond_agg_timer_advance(struct bonding *bond)
2424{
2425 int val, nval;
2426
2427 while (1) {
2428 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);
2429 if (!val)
2430 return false;
2431 nval = val - 1;
2432 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,
2433 val, nval) == val)
2434 break;
2435 }
2436 return nval == 0;
2437}
2438
2439/**
2440 * bond_3ad_state_machine_handler - handle state machines timeout
2441 * @work: work context to fetch bonding struct to work on from
2442 *
2443 * The state machine handling concept in this module is to check every tick
2444 * which state machine should operate any function. The execution order is
2445 * round robin, so when we have an interaction between state machines, the
2446 * reply of one to each other might be delayed until next tick.
2447 *
2448 * This function also complete the initialization when the agg_select_timer
2449 * times out, and it selects an aggregator for the ports that are yet not
2450 * related to any aggregator, and selects the active aggregator for a bond.
2451 */
2452void bond_3ad_state_machine_handler(struct work_struct *work)
2453{
2454 struct bonding *bond = container_of(work, struct bonding,
2455 ad_work.work);
2456 struct aggregator *aggregator;
2457 struct list_head *iter;
2458 struct slave *slave;
2459 struct port *port;
2460 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2461 bool update_slave_arr = false;
2462
2463 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2464 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2465 * concurrently due to incoming LACPDU as well.
2466 */
2467 spin_lock_bh(&bond->mode_lock);
2468 rcu_read_lock();
2469
2470 /* check if there are any slaves */
2471 if (!bond_has_slaves(bond))
2472 goto re_arm;
2473
2474 if (bond_agg_timer_advance(bond)) {
2475 slave = bond_first_slave_rcu(bond);
2476 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2477
2478 /* select the active aggregator for the bond */
2479 if (port) {
2480 if (!port->slave) {
2481 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2482 bond->dev->name);
2483 goto re_arm;
2484 }
2485
2486 aggregator = __get_first_agg(port);
2487 ad_agg_selection_logic(aggregator, &update_slave_arr);
2488 }
2489 bond_3ad_set_carrier(bond);
2490 }
2491
2492 /* for each port run the state machines */
2493 bond_for_each_slave_rcu(bond, slave, iter) {
2494 port = &(SLAVE_AD_INFO(slave)->port);
2495 if (!port->slave) {
2496 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2497 bond->dev->name);
2498 goto re_arm;
2499 }
2500
2501 ad_rx_machine(NULL, port);
2502 ad_periodic_machine(port, &bond->params);
2503 ad_port_selection_logic(port, &update_slave_arr);
2504 ad_mux_machine(port, &update_slave_arr);
2505 ad_tx_machine(port);
2506 ad_churn_machine(port);
2507
2508 /* turn off the BEGIN bit, since we already handled it */
2509 if (port->sm_vars & AD_PORT_BEGIN)
2510 port->sm_vars &= ~AD_PORT_BEGIN;
2511 }
2512
2513re_arm:
2514 bond_for_each_slave_rcu(bond, slave, iter) {
2515 if (slave->should_notify) {
2516 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2517 break;
2518 }
2519 }
2520 rcu_read_unlock();
2521 spin_unlock_bh(&bond->mode_lock);
2522
2523 if (update_slave_arr)
2524 bond_slave_arr_work_rearm(bond, 0);
2525
2526 if (should_notify_rtnl && rtnl_trylock()) {
2527 bond_slave_state_notify(bond);
2528 rtnl_unlock();
2529 }
2530 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2531}
2532
2533/**
2534 * bond_3ad_rx_indication - handle a received frame
2535 * @lacpdu: received lacpdu
2536 * @slave: slave struct to work on
2537 *
2538 * It is assumed that frames that were sent on this NIC don't returned as new
2539 * received frames (loopback). Since only the payload is given to this
2540 * function, it check for loopback.
2541 */
2542static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)
2543{
2544 struct bonding *bond = slave->bond;
2545 int ret = RX_HANDLER_ANOTHER;
2546 struct bond_marker *marker;
2547 struct port *port;
2548 atomic64_t *stat;
2549
2550 port = &(SLAVE_AD_INFO(slave)->port);
2551 if (!port->slave) {
2552 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2553 slave->dev->name, slave->bond->dev->name);
2554 return ret;
2555 }
2556
2557 switch (lacpdu->subtype) {
2558 case AD_TYPE_LACPDU:
2559 ret = RX_HANDLER_CONSUMED;
2560 slave_dbg(slave->bond->dev, slave->dev,
2561 "Received LACPDU on port %d\n",
2562 port->actor_port_number);
2563 /* Protect against concurrent state machines */
2564 spin_lock(&slave->bond->mode_lock);
2565 ad_rx_machine(lacpdu, port);
2566 spin_unlock(&slave->bond->mode_lock);
2567 break;
2568 case AD_TYPE_MARKER:
2569 ret = RX_HANDLER_CONSUMED;
2570 /* No need to convert fields to Little Endian since we
2571 * don't use the marker's fields.
2572 */
2573 marker = (struct bond_marker *)lacpdu;
2574 switch (marker->tlv_type) {
2575 case AD_MARKER_INFORMATION_SUBTYPE:
2576 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",
2577 port->actor_port_number);
2578 ad_marker_info_received(marker, port);
2579 break;
2580 case AD_MARKER_RESPONSE_SUBTYPE:
2581 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",
2582 port->actor_port_number);
2583 ad_marker_response_received(marker, port);
2584 break;
2585 default:
2586 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",
2587 port->actor_port_number);
2588 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;
2589 atomic64_inc(stat);
2590 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;
2591 atomic64_inc(stat);
2592 }
2593 break;
2594 default:
2595 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);
2596 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);
2597 }
2598
2599 return ret;
2600}
2601
2602/**
2603 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2604 * its current speed and duplex settings.
2605 *
2606 * @port: the port we'are looking at
2607 * @reset: Boolean to just reset the speed and the duplex part of the key
2608 *
2609 * The logic to change the oper / admin keys is:
2610 * (a) A full duplex port can participate in LACP with partner.
2611 * (b) When the speed is changed, LACP need to be reinitiated.
2612 */
2613static void ad_update_actor_keys(struct port *port, bool reset)
2614{
2615 u8 duplex = 0;
2616 u16 ospeed = 0, speed = 0;
2617 u16 old_oper_key = port->actor_oper_port_key;
2618
2619 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2620 if (!reset) {
2621 speed = __get_link_speed(port);
2622 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2623 duplex = __get_duplex(port);
2624 port->actor_admin_port_key |= (speed << 1) | duplex;
2625 }
2626 port->actor_oper_port_key = port->actor_admin_port_key;
2627
2628 if (old_oper_key != port->actor_oper_port_key) {
2629 /* Only 'duplex' port participates in LACP */
2630 if (duplex)
2631 port->sm_vars |= AD_PORT_LACP_ENABLED;
2632 else
2633 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2634
2635 if (!reset) {
2636 if (!speed) {
2637 slave_err(port->slave->bond->dev,
2638 port->slave->dev,
2639 "speed changed to 0 on port %d\n",
2640 port->actor_port_number);
2641 } else if (duplex && ospeed != speed) {
2642 /* Speed change restarts LACP state-machine */
2643 port->sm_vars |= AD_PORT_BEGIN;
2644 }
2645 }
2646 }
2647}
2648
2649/**
2650 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2651 * change indication
2652 *
2653 * @slave: slave struct to work on
2654 *
2655 * Handle reselection of aggregator (if needed) for this port.
2656 */
2657void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2658{
2659 struct port *port;
2660
2661 port = &(SLAVE_AD_INFO(slave)->port);
2662
2663 /* if slave is null, the whole port is not initialized */
2664 if (!port->slave) {
2665 slave_warn(slave->bond->dev, slave->dev,
2666 "speed/duplex changed for uninitialized port\n");
2667 return;
2668 }
2669
2670 spin_lock_bh(&slave->bond->mode_lock);
2671 ad_update_actor_keys(port, false);
2672 spin_unlock_bh(&slave->bond->mode_lock);
2673 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",
2674 port->actor_port_number);
2675}
2676
2677/**
2678 * bond_3ad_handle_link_change - handle a slave's link status change indication
2679 * @slave: slave struct to work on
2680 * @link: whether the link is now up or down
2681 *
2682 * Handle reselection of aggregator (if needed) for this port.
2683 */
2684void bond_3ad_handle_link_change(struct slave *slave, char link)
2685{
2686 struct aggregator *agg;
2687 struct port *port;
2688 bool dummy;
2689
2690 port = &(SLAVE_AD_INFO(slave)->port);
2691
2692 /* if slave is null, the whole port is not initialized */
2693 if (!port->slave) {
2694 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");
2695 return;
2696 }
2697
2698 spin_lock_bh(&slave->bond->mode_lock);
2699 /* on link down we are zeroing duplex and speed since
2700 * some of the adaptors(ce1000.lan) report full duplex/speed
2701 * instead of N/A(duplex) / 0(speed).
2702 *
2703 * on link up we are forcing recheck on the duplex and speed since
2704 * some of he adaptors(ce1000.lan) report.
2705 */
2706 if (link == BOND_LINK_UP) {
2707 port->is_enabled = true;
2708 ad_update_actor_keys(port, false);
2709 } else {
2710 /* link has failed */
2711 port->is_enabled = false;
2712 ad_update_actor_keys(port, true);
2713 }
2714 agg = __get_first_agg(port);
2715 ad_agg_selection_logic(agg, &dummy);
2716
2717 spin_unlock_bh(&slave->bond->mode_lock);
2718
2719 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",
2720 port->actor_port_number,
2721 link == BOND_LINK_UP ? "UP" : "DOWN");
2722
2723 /* RTNL is held and mode_lock is released so it's safe
2724 * to update slave_array here.
2725 */
2726 bond_update_slave_arr(slave->bond, NULL);
2727}
2728
2729/**
2730 * bond_3ad_set_carrier - set link state for bonding master
2731 * @bond: bonding structure
2732 *
2733 * if we have an active aggregator, we're up, if not, we're down.
2734 * Presumes that we cannot have an active aggregator if there are
2735 * no slaves with link up.
2736 *
2737 * This behavior complies with IEEE 802.3 section 43.3.9.
2738 *
2739 * Called by bond_set_carrier(). Return zero if carrier state does not
2740 * change, nonzero if it does.
2741 */
2742int bond_3ad_set_carrier(struct bonding *bond)
2743{
2744 struct aggregator *active;
2745 struct slave *first_slave;
2746 int ret = 1;
2747
2748 rcu_read_lock();
2749 first_slave = bond_first_slave_rcu(bond);
2750 if (!first_slave) {
2751 ret = 0;
2752 goto out;
2753 }
2754 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2755 if (active) {
2756 /* are enough slaves available to consider link up? */
2757 if (__agg_active_ports(active) < bond->params.min_links) {
2758 if (netif_carrier_ok(bond->dev)) {
2759 netif_carrier_off(bond->dev);
2760 goto out;
2761 }
2762 } else if (!netif_carrier_ok(bond->dev)) {
2763 netif_carrier_on(bond->dev);
2764 goto out;
2765 }
2766 } else if (netif_carrier_ok(bond->dev)) {
2767 netif_carrier_off(bond->dev);
2768 }
2769out:
2770 rcu_read_unlock();
2771 return ret;
2772}
2773
2774/**
2775 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2776 * @bond: bonding struct to work on
2777 * @ad_info: ad_info struct to fill with the bond's info
2778 *
2779 * Returns: 0 on success
2780 * < 0 on error
2781 */
2782int __bond_3ad_get_active_agg_info(struct bonding *bond,
2783 struct ad_info *ad_info)
2784{
2785 struct aggregator *aggregator = NULL;
2786 struct list_head *iter;
2787 struct slave *slave;
2788 struct port *port;
2789
2790 bond_for_each_slave_rcu(bond, slave, iter) {
2791 port = &(SLAVE_AD_INFO(slave)->port);
2792 if (port->aggregator && port->aggregator->is_active) {
2793 aggregator = port->aggregator;
2794 break;
2795 }
2796 }
2797
2798 if (!aggregator)
2799 return -1;
2800
2801 ad_info->aggregator_id = aggregator->aggregator_identifier;
2802 ad_info->ports = __agg_active_ports(aggregator);
2803 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2804 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2805 ether_addr_copy(ad_info->partner_system,
2806 aggregator->partner_system.mac_addr_value);
2807 return 0;
2808}
2809
2810int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2811{
2812 int ret;
2813
2814 rcu_read_lock();
2815 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2816 rcu_read_unlock();
2817
2818 return ret;
2819}
2820
2821int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2822 struct slave *slave)
2823{
2824 struct lacpdu *lacpdu, _lacpdu;
2825
2826 if (skb->protocol != PKT_TYPE_LACPDU)
2827 return RX_HANDLER_ANOTHER;
2828
2829 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2830 return RX_HANDLER_ANOTHER;
2831
2832 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2833 if (!lacpdu) {
2834 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);
2835 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);
2836 return RX_HANDLER_ANOTHER;
2837 }
2838
2839 return bond_3ad_rx_indication(lacpdu, slave);
2840}
2841
2842/**
2843 * bond_3ad_update_lacp_rate - change the lacp rate
2844 * @bond: bonding struct
2845 *
2846 * When modify lacp_rate parameter via sysfs,
2847 * update actor_oper_port_state of each port.
2848 *
2849 * Hold bond->mode_lock,
2850 * so we can modify port->actor_oper_port_state,
2851 * no matter bond is up or down.
2852 */
2853void bond_3ad_update_lacp_rate(struct bonding *bond)
2854{
2855 struct port *port = NULL;
2856 struct list_head *iter;
2857 struct slave *slave;
2858 int lacp_fast;
2859
2860 lacp_fast = bond->params.lacp_fast;
2861 spin_lock_bh(&bond->mode_lock);
2862 bond_for_each_slave(bond, slave, iter) {
2863 port = &(SLAVE_AD_INFO(slave)->port);
2864 if (lacp_fast)
2865 port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT;
2866 else
2867 port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT;
2868 }
2869 spin_unlock_bh(&bond->mode_lock);
2870}
2871
2872size_t bond_3ad_stats_size(void)
2873{
2874 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */
2875 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */
2876 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */
2877 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */
2878 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */
2879 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */
2880 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */
2881 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */
2882 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */
2883}
2884
2885int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)
2886{
2887 u64 val;
2888
2889 val = atomic64_read(&stats->lacpdu_rx);
2890 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,
2891 BOND_3AD_STAT_PAD))
2892 return -EMSGSIZE;
2893 val = atomic64_read(&stats->lacpdu_tx);
2894 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,
2895 BOND_3AD_STAT_PAD))
2896 return -EMSGSIZE;
2897 val = atomic64_read(&stats->lacpdu_unknown_rx);
2898 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,
2899 BOND_3AD_STAT_PAD))
2900 return -EMSGSIZE;
2901 val = atomic64_read(&stats->lacpdu_illegal_rx);
2902 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,
2903 BOND_3AD_STAT_PAD))
2904 return -EMSGSIZE;
2905
2906 val = atomic64_read(&stats->marker_rx);
2907 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,
2908 BOND_3AD_STAT_PAD))
2909 return -EMSGSIZE;
2910 val = atomic64_read(&stats->marker_tx);
2911 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,
2912 BOND_3AD_STAT_PAD))
2913 return -EMSGSIZE;
2914 val = atomic64_read(&stats->marker_resp_rx);
2915 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,
2916 BOND_3AD_STAT_PAD))
2917 return -EMSGSIZE;
2918 val = atomic64_read(&stats->marker_resp_tx);
2919 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,
2920 BOND_3AD_STAT_PAD))
2921 return -EMSGSIZE;
2922 val = atomic64_read(&stats->marker_unknown_rx);
2923 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,
2924 BOND_3AD_STAT_PAD))
2925 return -EMSGSIZE;
2926
2927 return 0;
2928}
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 state definitions (43.4.2.2 in the 802.3ad standard) */
35#define AD_STATE_LACP_ACTIVITY 0x1
36#define AD_STATE_LACP_TIMEOUT 0x2
37#define AD_STATE_AGGREGATION 0x4
38#define AD_STATE_SYNCHRONIZATION 0x8
39#define AD_STATE_COLLECTING 0x10
40#define AD_STATE_DISTRIBUTING 0x20
41#define AD_STATE_DEFAULTED 0x40
42#define AD_STATE_EXPIRED 0x80
43
44/* Port Variables definitions used by the State Machines (43.4.7 in the
45 * 802.3ad standard)
46 */
47#define AD_PORT_BEGIN 0x1
48#define AD_PORT_LACP_ENABLED 0x2
49#define AD_PORT_ACTOR_CHURN 0x4
50#define AD_PORT_PARTNER_CHURN 0x8
51#define AD_PORT_READY 0x10
52#define AD_PORT_READY_N 0x20
53#define AD_PORT_MATCHED 0x40
54#define AD_PORT_STANDBY 0x80
55#define AD_PORT_SELECTED 0x100
56#define AD_PORT_MOVED 0x200
57#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
58
59/* Port Key definitions
60 * key is determined according to the link speed, duplex and
61 * user key (which is yet not supported)
62 * --------------------------------------------------------------
63 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
64 * --------------------------------------------------------------
65 * |15 6|5 1|0
66 */
67#define AD_DUPLEX_KEY_MASKS 0x1
68#define AD_SPEED_KEY_MASKS 0x3E
69#define AD_USER_KEY_MASKS 0xFFC0
70
71enum ad_link_speed_type {
72 AD_LINK_SPEED_1MBPS = 1,
73 AD_LINK_SPEED_10MBPS,
74 AD_LINK_SPEED_100MBPS,
75 AD_LINK_SPEED_1000MBPS,
76 AD_LINK_SPEED_2500MBPS,
77 AD_LINK_SPEED_5000MBPS,
78 AD_LINK_SPEED_10000MBPS,
79 AD_LINK_SPEED_14000MBPS,
80 AD_LINK_SPEED_20000MBPS,
81 AD_LINK_SPEED_25000MBPS,
82 AD_LINK_SPEED_40000MBPS,
83 AD_LINK_SPEED_50000MBPS,
84 AD_LINK_SPEED_56000MBPS,
85 AD_LINK_SPEED_100000MBPS,
86};
87
88/* compare MAC addresses */
89#define MAC_ADDRESS_EQUAL(A, B) \
90 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
91
92static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
93 0, 0, 0, 0, 0, 0
94};
95static u16 ad_ticks_per_sec;
96static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
97
98static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
99 MULTICAST_LACPDU_ADDR;
100
101/* ================= main 802.3ad protocol functions ================== */
102static int ad_lacpdu_send(struct port *port);
103static int ad_marker_send(struct port *port, struct bond_marker *marker);
104static void ad_mux_machine(struct port *port, bool *update_slave_arr);
105static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
106static void ad_tx_machine(struct port *port);
107static void ad_periodic_machine(struct port *port);
108static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
109static void ad_agg_selection_logic(struct aggregator *aggregator,
110 bool *update_slave_arr);
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,
115 bool *update_slave_arr);
116static void ad_disable_collecting_distributing(struct port *port,
117 bool *update_slave_arr);
118static void ad_marker_info_received(struct bond_marker *marker_info,
119 struct port *port);
120static void ad_marker_response_received(struct bond_marker *marker,
121 struct port *port);
122static void ad_update_actor_keys(struct port *port, bool reset);
123
124
125/* ================= api to bonding and kernel code ================== */
126
127/**
128 * __get_bond_by_port - get the port's bonding struct
129 * @port: the port we're looking at
130 *
131 * Return @port's bonding struct, or %NULL if it can't be found.
132 */
133static inline struct bonding *__get_bond_by_port(struct port *port)
134{
135 if (port->slave == NULL)
136 return NULL;
137
138 return bond_get_bond_by_slave(port->slave);
139}
140
141/**
142 * __get_first_agg - get the first aggregator in the bond
143 * @bond: the bond we're looking at
144 *
145 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
146 * found.
147 * The caller must hold RCU or RTNL lock.
148 */
149static inline struct aggregator *__get_first_agg(struct port *port)
150{
151 struct bonding *bond = __get_bond_by_port(port);
152 struct slave *first_slave;
153 struct aggregator *agg;
154
155 /* If there's no bond for this port, or bond has no slaves */
156 if (bond == NULL)
157 return NULL;
158
159 rcu_read_lock();
160 first_slave = bond_first_slave_rcu(bond);
161 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
162 rcu_read_unlock();
163
164 return agg;
165}
166
167/**
168 * __agg_has_partner - see if we have a partner
169 * @agg: the agregator we're looking at
170 *
171 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
172 * address for the partner). Return 0 if not.
173 */
174static inline int __agg_has_partner(struct aggregator *agg)
175{
176 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
177}
178
179/**
180 * __disable_port - disable the port's slave
181 * @port: the port we're looking at
182 */
183static inline void __disable_port(struct port *port)
184{
185 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
186}
187
188/**
189 * __enable_port - enable the port's slave, if it's up
190 * @port: the port we're looking at
191 */
192static inline void __enable_port(struct port *port)
193{
194 struct slave *slave = port->slave;
195
196 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
197 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
198}
199
200/**
201 * __port_is_enabled - check if the port's slave is in active state
202 * @port: the port we're looking at
203 */
204static inline int __port_is_enabled(struct port *port)
205{
206 return bond_is_active_slave(port->slave);
207}
208
209/**
210 * __get_agg_selection_mode - get the aggregator selection mode
211 * @port: the port we're looking at
212 *
213 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
214 */
215static inline u32 __get_agg_selection_mode(struct port *port)
216{
217 struct bonding *bond = __get_bond_by_port(port);
218
219 if (bond == NULL)
220 return BOND_AD_STABLE;
221
222 return bond->params.ad_select;
223}
224
225/**
226 * __check_agg_selection_timer - check if the selection timer has expired
227 * @port: the port we're looking at
228 */
229static inline int __check_agg_selection_timer(struct port *port)
230{
231 struct bonding *bond = __get_bond_by_port(port);
232
233 if (bond == NULL)
234 return 0;
235
236 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
237}
238
239/**
240 * __get_link_speed - get a port's speed
241 * @port: the port we're looking at
242 *
243 * Return @port's speed in 802.3ad enum format. i.e. one of:
244 * 0,
245 * %AD_LINK_SPEED_10MBPS,
246 * %AD_LINK_SPEED_100MBPS,
247 * %AD_LINK_SPEED_1000MBPS,
248 * %AD_LINK_SPEED_2500MBPS,
249 * %AD_LINK_SPEED_5000MBPS,
250 * %AD_LINK_SPEED_10000MBPS
251 * %AD_LINK_SPEED_14000MBPS,
252 * %AD_LINK_SPEED_20000MBPS
253 * %AD_LINK_SPEED_25000MBPS
254 * %AD_LINK_SPEED_40000MBPS
255 * %AD_LINK_SPEED_50000MBPS
256 * %AD_LINK_SPEED_56000MBPS
257 * %AD_LINK_SPEED_100000MBPS
258 */
259static u16 __get_link_speed(struct port *port)
260{
261 struct slave *slave = port->slave;
262 u16 speed;
263
264 /* this if covers only a special case: when the configuration starts
265 * with link down, it sets the speed to 0.
266 * This is done in spite of the fact that the e100 driver reports 0
267 * to be compatible with MVT in the future.
268 */
269 if (slave->link != BOND_LINK_UP)
270 speed = 0;
271 else {
272 switch (slave->speed) {
273 case SPEED_10:
274 speed = AD_LINK_SPEED_10MBPS;
275 break;
276
277 case SPEED_100:
278 speed = AD_LINK_SPEED_100MBPS;
279 break;
280
281 case SPEED_1000:
282 speed = AD_LINK_SPEED_1000MBPS;
283 break;
284
285 case SPEED_2500:
286 speed = AD_LINK_SPEED_2500MBPS;
287 break;
288
289 case SPEED_5000:
290 speed = AD_LINK_SPEED_5000MBPS;
291 break;
292
293 case SPEED_10000:
294 speed = AD_LINK_SPEED_10000MBPS;
295 break;
296
297 case SPEED_14000:
298 speed = AD_LINK_SPEED_14000MBPS;
299 break;
300
301 case SPEED_20000:
302 speed = AD_LINK_SPEED_20000MBPS;
303 break;
304
305 case SPEED_25000:
306 speed = AD_LINK_SPEED_25000MBPS;
307 break;
308
309 case SPEED_40000:
310 speed = AD_LINK_SPEED_40000MBPS;
311 break;
312
313 case SPEED_50000:
314 speed = AD_LINK_SPEED_50000MBPS;
315 break;
316
317 case SPEED_56000:
318 speed = AD_LINK_SPEED_56000MBPS;
319 break;
320
321 case SPEED_100000:
322 speed = AD_LINK_SPEED_100000MBPS;
323 break;
324
325 default:
326 /* unknown speed value from ethtool. shouldn't happen */
327 if (slave->speed != SPEED_UNKNOWN)
328 pr_warn_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n",
329 slave->bond->dev->name,
330 slave->dev->name, slave->speed,
331 port->actor_port_number);
332 speed = 0;
333 break;
334 }
335 }
336
337 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n",
338 port->actor_port_number, speed);
339 return speed;
340}
341
342/**
343 * __get_duplex - get a port's duplex
344 * @port: the port we're looking at
345 *
346 * Return @port's duplex in 802.3ad bitmask format. i.e.:
347 * 0x01 if in full duplex
348 * 0x00 otherwise
349 */
350static u8 __get_duplex(struct port *port)
351{
352 struct slave *slave = port->slave;
353 u8 retval = 0x0;
354
355 /* handling a special case: when the configuration starts with
356 * link down, it sets the duplex to 0.
357 */
358 if (slave->link == BOND_LINK_UP) {
359 switch (slave->duplex) {
360 case DUPLEX_FULL:
361 retval = 0x1;
362 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n",
363 port->actor_port_number);
364 break;
365 case DUPLEX_HALF:
366 default:
367 retval = 0x0;
368 slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n",
369 port->actor_port_number);
370 break;
371 }
372 }
373 return retval;
374}
375
376static void __ad_actor_update_port(struct port *port)
377{
378 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
379
380 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
381 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
382}
383
384/* Conversions */
385
386/**
387 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
388 * @timer_type: which timer to operate
389 * @par: timer parameter. see below
390 *
391 * If @timer_type is %current_while_timer, @par indicates long/short timer.
392 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
393 * %SLOW_PERIODIC_TIME.
394 */
395static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
396{
397 u16 retval = 0; /* to silence the compiler */
398
399 switch (timer_type) {
400 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
401 if (par)
402 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
403 else
404 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
405 break;
406 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
407 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
408 break;
409 case AD_PERIODIC_TIMER: /* for periodic machine */
410 retval = (par*ad_ticks_per_sec); /* long timeout */
411 break;
412 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
413 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
414 break;
415 case AD_WAIT_WHILE_TIMER: /* for selection machine */
416 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
417 break;
418 }
419
420 return retval;
421}
422
423
424/* ================= ad_rx_machine helper functions ================== */
425
426/**
427 * __choose_matched - update a port's matched variable from a received lacpdu
428 * @lacpdu: the lacpdu we've received
429 * @port: the port we're looking at
430 *
431 * Update the value of the matched variable, using parameter values from a
432 * newly received lacpdu. Parameter values for the partner carried in the
433 * received PDU are compared with the corresponding operational parameter
434 * values for the actor. Matched is set to TRUE if all of these parameters
435 * match and the PDU parameter partner_state.aggregation has the same value as
436 * actor_oper_port_state.aggregation and lacp will actively maintain the link
437 * in the aggregation. Matched is also set to TRUE if the value of
438 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
439 * an individual link and lacp will actively maintain the link. Otherwise,
440 * matched is set to FALSE. LACP is considered to be actively maintaining the
441 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
442 * the actor's actor_oper_port_state.lacp_activity and the PDU's
443 * partner_state.lacp_activity variables are TRUE.
444 *
445 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
446 * used here to implement the language from 802.3ad 43.4.9 that requires
447 * recordPDU to "match" the LACPDU parameters to the stored values.
448 */
449static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
450{
451 /* check if all parameters are alike
452 * or this is individual link(aggregation == FALSE)
453 * then update the state machine Matched variable.
454 */
455 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
456 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
457 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
458 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
459 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
460 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
461 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
462 ) {
463 port->sm_vars |= AD_PORT_MATCHED;
464 } else {
465 port->sm_vars &= ~AD_PORT_MATCHED;
466 }
467}
468
469/**
470 * __record_pdu - record parameters from a received lacpdu
471 * @lacpdu: the lacpdu we've received
472 * @port: the port we're looking at
473 *
474 * Record the parameter values for the Actor carried in a received lacpdu as
475 * the current partner operational parameter values and sets
476 * actor_oper_port_state.defaulted to FALSE.
477 */
478static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
479{
480 if (lacpdu && port) {
481 struct port_params *partner = &port->partner_oper;
482
483 __choose_matched(lacpdu, port);
484 /* record the new parameter values for the partner
485 * operational
486 */
487 partner->port_number = ntohs(lacpdu->actor_port);
488 partner->port_priority = ntohs(lacpdu->actor_port_priority);
489 partner->system = lacpdu->actor_system;
490 partner->system_priority = ntohs(lacpdu->actor_system_priority);
491 partner->key = ntohs(lacpdu->actor_key);
492 partner->port_state = lacpdu->actor_state;
493
494 /* set actor_oper_port_state.defaulted to FALSE */
495 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
496
497 /* set the partner sync. to on if the partner is sync,
498 * and the port is matched
499 */
500 if ((port->sm_vars & AD_PORT_MATCHED) &&
501 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
502 partner->port_state |= AD_STATE_SYNCHRONIZATION;
503 slave_dbg(port->slave->bond->dev, port->slave->dev,
504 "partner sync=1\n");
505 } else {
506 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
507 slave_dbg(port->slave->bond->dev, port->slave->dev,
508 "partner sync=0\n");
509 }
510 }
511}
512
513/**
514 * __record_default - record default parameters
515 * @port: the port we're looking at
516 *
517 * This function records the default parameter values for the partner carried
518 * in the Partner Admin parameters as the current partner operational parameter
519 * values and sets actor_oper_port_state.defaulted to TRUE.
520 */
521static void __record_default(struct port *port)
522{
523 if (port) {
524 /* record the partner admin parameters */
525 memcpy(&port->partner_oper, &port->partner_admin,
526 sizeof(struct port_params));
527
528 /* set actor_oper_port_state.defaulted to true */
529 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
530 }
531}
532
533/**
534 * __update_selected - update a port's Selected variable from a received lacpdu
535 * @lacpdu: the lacpdu we've received
536 * @port: the port we're looking at
537 *
538 * Update the value of the selected variable, using parameter values from a
539 * newly received lacpdu. The parameter values for the Actor carried in the
540 * received PDU are compared with the corresponding operational parameter
541 * values for the ports partner. If one or more of the comparisons shows that
542 * the value(s) received in the PDU differ from the current operational values,
543 * then selected is set to FALSE and actor_oper_port_state.synchronization is
544 * set to out_of_sync. Otherwise, selected remains unchanged.
545 */
546static void __update_selected(struct lacpdu *lacpdu, struct port *port)
547{
548 if (lacpdu && port) {
549 const struct port_params *partner = &port->partner_oper;
550
551 /* check if any parameter is different then
552 * update the state machine selected variable.
553 */
554 if (ntohs(lacpdu->actor_port) != partner->port_number ||
555 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
556 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
557 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
558 ntohs(lacpdu->actor_key) != partner->key ||
559 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
560 port->sm_vars &= ~AD_PORT_SELECTED;
561 }
562 }
563}
564
565/**
566 * __update_default_selected - update a port's Selected variable from Partner
567 * @port: the port we're looking at
568 *
569 * This function updates the value of the selected variable, using the partner
570 * administrative parameter values. The administrative values are compared with
571 * the corresponding operational parameter values for the partner. If one or
572 * more of the comparisons shows that the administrative value(s) differ from
573 * the current operational values, then Selected is set to FALSE and
574 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
575 * Selected remains unchanged.
576 */
577static void __update_default_selected(struct port *port)
578{
579 if (port) {
580 const struct port_params *admin = &port->partner_admin;
581 const struct port_params *oper = &port->partner_oper;
582
583 /* check if any parameter is different then
584 * update the state machine selected variable.
585 */
586 if (admin->port_number != oper->port_number ||
587 admin->port_priority != oper->port_priority ||
588 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
589 admin->system_priority != oper->system_priority ||
590 admin->key != oper->key ||
591 (admin->port_state & AD_STATE_AGGREGATION)
592 != (oper->port_state & AD_STATE_AGGREGATION)) {
593 port->sm_vars &= ~AD_PORT_SELECTED;
594 }
595 }
596}
597
598/**
599 * __update_ntt - update a port's ntt variable from a received lacpdu
600 * @lacpdu: the lacpdu we've received
601 * @port: the port we're looking at
602 *
603 * Updates the value of the ntt variable, using parameter values from a newly
604 * received lacpdu. The parameter values for the partner carried in the
605 * received PDU are compared with the corresponding operational parameter
606 * values for the Actor. If one or more of the comparisons shows that the
607 * value(s) received in the PDU differ from the current operational values,
608 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
609 */
610static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
611{
612 /* validate lacpdu and port */
613 if (lacpdu && port) {
614 /* check if any parameter is different then
615 * update the port->ntt.
616 */
617 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
618 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
619 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
620 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
621 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
622 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
623 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
624 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
625 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
626 ) {
627 port->ntt = true;
628 }
629 }
630}
631
632/**
633 * __agg_ports_are_ready - check if all ports in an aggregator are ready
634 * @aggregator: the aggregator we're looking at
635 *
636 */
637static int __agg_ports_are_ready(struct aggregator *aggregator)
638{
639 struct port *port;
640 int retval = 1;
641
642 if (aggregator) {
643 /* scan all ports in this aggregator to verfy if they are
644 * all ready.
645 */
646 for (port = aggregator->lag_ports;
647 port;
648 port = port->next_port_in_aggregator) {
649 if (!(port->sm_vars & AD_PORT_READY_N)) {
650 retval = 0;
651 break;
652 }
653 }
654 }
655
656 return retval;
657}
658
659/**
660 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
661 * @aggregator: the aggregator we're looking at
662 * @val: Should the ports' ready bit be set on or off
663 *
664 */
665static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
666{
667 struct port *port;
668
669 for (port = aggregator->lag_ports; port;
670 port = port->next_port_in_aggregator) {
671 if (val)
672 port->sm_vars |= AD_PORT_READY;
673 else
674 port->sm_vars &= ~AD_PORT_READY;
675 }
676}
677
678static int __agg_active_ports(struct aggregator *agg)
679{
680 struct port *port;
681 int active = 0;
682
683 for (port = agg->lag_ports; port;
684 port = port->next_port_in_aggregator) {
685 if (port->is_enabled)
686 active++;
687 }
688
689 return active;
690}
691
692/**
693 * __get_agg_bandwidth - get the total bandwidth of an aggregator
694 * @aggregator: the aggregator we're looking at
695 *
696 */
697static u32 __get_agg_bandwidth(struct aggregator *aggregator)
698{
699 int nports = __agg_active_ports(aggregator);
700 u32 bandwidth = 0;
701
702 if (nports) {
703 switch (__get_link_speed(aggregator->lag_ports)) {
704 case AD_LINK_SPEED_1MBPS:
705 bandwidth = nports;
706 break;
707 case AD_LINK_SPEED_10MBPS:
708 bandwidth = nports * 10;
709 break;
710 case AD_LINK_SPEED_100MBPS:
711 bandwidth = nports * 100;
712 break;
713 case AD_LINK_SPEED_1000MBPS:
714 bandwidth = nports * 1000;
715 break;
716 case AD_LINK_SPEED_2500MBPS:
717 bandwidth = nports * 2500;
718 break;
719 case AD_LINK_SPEED_5000MBPS:
720 bandwidth = nports * 5000;
721 break;
722 case AD_LINK_SPEED_10000MBPS:
723 bandwidth = nports * 10000;
724 break;
725 case AD_LINK_SPEED_14000MBPS:
726 bandwidth = nports * 14000;
727 break;
728 case AD_LINK_SPEED_20000MBPS:
729 bandwidth = nports * 20000;
730 break;
731 case AD_LINK_SPEED_25000MBPS:
732 bandwidth = nports * 25000;
733 break;
734 case AD_LINK_SPEED_40000MBPS:
735 bandwidth = nports * 40000;
736 break;
737 case AD_LINK_SPEED_50000MBPS:
738 bandwidth = nports * 50000;
739 break;
740 case AD_LINK_SPEED_56000MBPS:
741 bandwidth = nports * 56000;
742 break;
743 case AD_LINK_SPEED_100000MBPS:
744 bandwidth = nports * 100000;
745 break;
746 default:
747 bandwidth = 0; /* to silence the compiler */
748 }
749 }
750 return bandwidth;
751}
752
753/**
754 * __get_active_agg - get the current active aggregator
755 * @aggregator: the aggregator we're looking at
756 *
757 * Caller must hold RCU lock.
758 */
759static struct aggregator *__get_active_agg(struct aggregator *aggregator)
760{
761 struct bonding *bond = aggregator->slave->bond;
762 struct list_head *iter;
763 struct slave *slave;
764
765 bond_for_each_slave_rcu(bond, slave, iter)
766 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
767 return &(SLAVE_AD_INFO(slave)->aggregator);
768
769 return NULL;
770}
771
772/**
773 * __update_lacpdu_from_port - update a port's lacpdu fields
774 * @port: the port we're looking at
775 */
776static inline void __update_lacpdu_from_port(struct port *port)
777{
778 struct lacpdu *lacpdu = &port->lacpdu;
779 const struct port_params *partner = &port->partner_oper;
780
781 /* update current actual Actor parameters
782 * lacpdu->subtype initialized
783 * lacpdu->version_number initialized
784 * lacpdu->tlv_type_actor_info initialized
785 * lacpdu->actor_information_length initialized
786 */
787
788 lacpdu->actor_system_priority = htons(port->actor_system_priority);
789 lacpdu->actor_system = port->actor_system;
790 lacpdu->actor_key = htons(port->actor_oper_port_key);
791 lacpdu->actor_port_priority = htons(port->actor_port_priority);
792 lacpdu->actor_port = htons(port->actor_port_number);
793 lacpdu->actor_state = port->actor_oper_port_state;
794 slave_dbg(port->slave->bond->dev, port->slave->dev,
795 "update lacpdu: actor port state %x\n",
796 port->actor_oper_port_state);
797
798 /* lacpdu->reserved_3_1 initialized
799 * lacpdu->tlv_type_partner_info initialized
800 * lacpdu->partner_information_length initialized
801 */
802
803 lacpdu->partner_system_priority = htons(partner->system_priority);
804 lacpdu->partner_system = partner->system;
805 lacpdu->partner_key = htons(partner->key);
806 lacpdu->partner_port_priority = htons(partner->port_priority);
807 lacpdu->partner_port = htons(partner->port_number);
808 lacpdu->partner_state = partner->port_state;
809
810 /* lacpdu->reserved_3_2 initialized
811 * lacpdu->tlv_type_collector_info initialized
812 * lacpdu->collector_information_length initialized
813 * collector_max_delay initialized
814 * reserved_12[12] initialized
815 * tlv_type_terminator initialized
816 * terminator_length initialized
817 * reserved_50[50] initialized
818 */
819}
820
821/* ================= main 802.3ad protocol code ========================= */
822
823/**
824 * ad_lacpdu_send - send out a lacpdu packet on a given port
825 * @port: the port we're looking at
826 *
827 * Returns: 0 on success
828 * < 0 on error
829 */
830static int ad_lacpdu_send(struct port *port)
831{
832 struct slave *slave = port->slave;
833 struct sk_buff *skb;
834 struct lacpdu_header *lacpdu_header;
835 int length = sizeof(struct lacpdu_header);
836
837 skb = dev_alloc_skb(length);
838 if (!skb)
839 return -ENOMEM;
840
841 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx);
842 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx);
843
844 skb->dev = slave->dev;
845 skb_reset_mac_header(skb);
846 skb->network_header = skb->mac_header + ETH_HLEN;
847 skb->protocol = PKT_TYPE_LACPDU;
848 skb->priority = TC_PRIO_CONTROL;
849
850 lacpdu_header = skb_put(skb, length);
851
852 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
853 /* Note: source address is set to be the member's PERMANENT address,
854 * because we use it to identify loopback lacpdus in receive.
855 */
856 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
857 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
858
859 lacpdu_header->lacpdu = port->lacpdu;
860
861 dev_queue_xmit(skb);
862
863 return 0;
864}
865
866/**
867 * ad_marker_send - send marker information/response on a given port
868 * @port: the port we're looking at
869 * @marker: marker data to send
870 *
871 * Returns: 0 on success
872 * < 0 on error
873 */
874static int ad_marker_send(struct port *port, struct bond_marker *marker)
875{
876 struct slave *slave = port->slave;
877 struct sk_buff *skb;
878 struct bond_marker_header *marker_header;
879 int length = sizeof(struct bond_marker_header);
880
881 skb = dev_alloc_skb(length + 16);
882 if (!skb)
883 return -ENOMEM;
884
885 switch (marker->tlv_type) {
886 case AD_MARKER_INFORMATION_SUBTYPE:
887 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx);
888 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx);
889 break;
890 case AD_MARKER_RESPONSE_SUBTYPE:
891 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx);
892 atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx);
893 break;
894 }
895
896 skb_reserve(skb, 16);
897
898 skb->dev = slave->dev;
899 skb_reset_mac_header(skb);
900 skb->network_header = skb->mac_header + ETH_HLEN;
901 skb->protocol = PKT_TYPE_LACPDU;
902
903 marker_header = skb_put(skb, length);
904
905 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
906 /* Note: source address is set to be the member's PERMANENT address,
907 * because we use it to identify loopback MARKERs in receive.
908 */
909 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
910 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
911
912 marker_header->marker = *marker;
913
914 dev_queue_xmit(skb);
915
916 return 0;
917}
918
919/**
920 * ad_mux_machine - handle a port's mux state machine
921 * @port: the port we're looking at
922 * @update_slave_arr: Does slave array need update?
923 */
924static void ad_mux_machine(struct port *port, bool *update_slave_arr)
925{
926 mux_states_t last_state;
927
928 /* keep current State Machine state to compare later if it was
929 * changed
930 */
931 last_state = port->sm_mux_state;
932
933 if (port->sm_vars & AD_PORT_BEGIN) {
934 port->sm_mux_state = AD_MUX_DETACHED;
935 } else {
936 switch (port->sm_mux_state) {
937 case AD_MUX_DETACHED:
938 if ((port->sm_vars & AD_PORT_SELECTED)
939 || (port->sm_vars & AD_PORT_STANDBY))
940 /* if SELECTED or STANDBY */
941 port->sm_mux_state = AD_MUX_WAITING;
942 break;
943 case AD_MUX_WAITING:
944 /* if SELECTED == FALSE return to DETACH state */
945 if (!(port->sm_vars & AD_PORT_SELECTED)) {
946 port->sm_vars &= ~AD_PORT_READY_N;
947 /* in order to withhold the Selection Logic to
948 * check all ports READY_N value every callback
949 * cycle to update ready variable, we check
950 * READY_N and update READY here
951 */
952 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
953 port->sm_mux_state = AD_MUX_DETACHED;
954 break;
955 }
956
957 /* check if the wait_while_timer expired */
958 if (port->sm_mux_timer_counter
959 && !(--port->sm_mux_timer_counter))
960 port->sm_vars |= AD_PORT_READY_N;
961
962 /* in order to withhold the selection logic to check
963 * all ports READY_N value every callback cycle to
964 * update ready variable, we check READY_N and update
965 * READY here
966 */
967 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
968
969 /* if the wait_while_timer expired, and the port is
970 * in READY state, move to ATTACHED state
971 */
972 if ((port->sm_vars & AD_PORT_READY)
973 && !port->sm_mux_timer_counter)
974 port->sm_mux_state = AD_MUX_ATTACHED;
975 break;
976 case AD_MUX_ATTACHED:
977 /* check also if agg_select_timer expired (so the
978 * edable port will take place only after this timer)
979 */
980 if ((port->sm_vars & AD_PORT_SELECTED) &&
981 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
982 !__check_agg_selection_timer(port)) {
983 if (port->aggregator->is_active)
984 port->sm_mux_state =
985 AD_MUX_COLLECTING_DISTRIBUTING;
986 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
987 (port->sm_vars & AD_PORT_STANDBY)) {
988 /* if UNSELECTED or STANDBY */
989 port->sm_vars &= ~AD_PORT_READY_N;
990 /* in order to withhold the selection logic to
991 * check all ports READY_N value every callback
992 * cycle to update ready variable, we check
993 * READY_N and update READY here
994 */
995 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
996 port->sm_mux_state = AD_MUX_DETACHED;
997 } else if (port->aggregator->is_active) {
998 port->actor_oper_port_state |=
999 AD_STATE_SYNCHRONIZATION;
1000 }
1001 break;
1002 case AD_MUX_COLLECTING_DISTRIBUTING:
1003 if (!(port->sm_vars & AD_PORT_SELECTED) ||
1004 (port->sm_vars & AD_PORT_STANDBY) ||
1005 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
1006 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
1007 port->sm_mux_state = AD_MUX_ATTACHED;
1008 } else {
1009 /* if port state hasn't changed make
1010 * sure that a collecting distributing
1011 * port in an active aggregator is enabled
1012 */
1013 if (port->aggregator &&
1014 port->aggregator->is_active &&
1015 !__port_is_enabled(port)) {
1016
1017 __enable_port(port);
1018 }
1019 }
1020 break;
1021 default:
1022 break;
1023 }
1024 }
1025
1026 /* check if the state machine was changed */
1027 if (port->sm_mux_state != last_state) {
1028 slave_dbg(port->slave->bond->dev, port->slave->dev,
1029 "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
1030 port->actor_port_number,
1031 last_state,
1032 port->sm_mux_state);
1033 switch (port->sm_mux_state) {
1034 case AD_MUX_DETACHED:
1035 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1036 ad_disable_collecting_distributing(port,
1037 update_slave_arr);
1038 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1039 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1040 port->ntt = true;
1041 break;
1042 case AD_MUX_WAITING:
1043 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1044 break;
1045 case AD_MUX_ATTACHED:
1046 if (port->aggregator->is_active)
1047 port->actor_oper_port_state |=
1048 AD_STATE_SYNCHRONIZATION;
1049 else
1050 port->actor_oper_port_state &=
1051 ~AD_STATE_SYNCHRONIZATION;
1052 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1053 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1054 ad_disable_collecting_distributing(port,
1055 update_slave_arr);
1056 port->ntt = true;
1057 break;
1058 case AD_MUX_COLLECTING_DISTRIBUTING:
1059 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1060 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1061 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1062 ad_enable_collecting_distributing(port,
1063 update_slave_arr);
1064 port->ntt = true;
1065 break;
1066 default:
1067 break;
1068 }
1069 }
1070}
1071
1072/**
1073 * ad_rx_machine - handle a port's rx State Machine
1074 * @lacpdu: the lacpdu we've received
1075 * @port: the port we're looking at
1076 *
1077 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1078 * CURRENT. If timer expired set the state machine in the proper state.
1079 * In other cases, this function checks if we need to switch to other state.
1080 */
1081static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1082{
1083 rx_states_t last_state;
1084
1085 /* keep current State Machine state to compare later if it was
1086 * changed
1087 */
1088 last_state = port->sm_rx_state;
1089
1090 if (lacpdu) {
1091 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx);
1092 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx);
1093 }
1094 /* check if state machine should change state */
1095
1096 /* first, check if port was reinitialized */
1097 if (port->sm_vars & AD_PORT_BEGIN) {
1098 port->sm_rx_state = AD_RX_INITIALIZE;
1099 port->sm_vars |= AD_PORT_CHURNED;
1100 /* check if port is not enabled */
1101 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
1102 port->sm_rx_state = AD_RX_PORT_DISABLED;
1103 /* check if new lacpdu arrived */
1104 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1105 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1106 (port->sm_rx_state == AD_RX_CURRENT))) {
1107 if (port->sm_rx_state != AD_RX_CURRENT)
1108 port->sm_vars |= AD_PORT_CHURNED;
1109 port->sm_rx_timer_counter = 0;
1110 port->sm_rx_state = AD_RX_CURRENT;
1111 } else {
1112 /* if timer is on, and if it is expired */
1113 if (port->sm_rx_timer_counter &&
1114 !(--port->sm_rx_timer_counter)) {
1115 switch (port->sm_rx_state) {
1116 case AD_RX_EXPIRED:
1117 port->sm_rx_state = AD_RX_DEFAULTED;
1118 break;
1119 case AD_RX_CURRENT:
1120 port->sm_rx_state = AD_RX_EXPIRED;
1121 break;
1122 default:
1123 break;
1124 }
1125 } else {
1126 /* if no lacpdu arrived and no timer is on */
1127 switch (port->sm_rx_state) {
1128 case AD_RX_PORT_DISABLED:
1129 if (port->is_enabled &&
1130 (port->sm_vars & AD_PORT_LACP_ENABLED))
1131 port->sm_rx_state = AD_RX_EXPIRED;
1132 else if (port->is_enabled
1133 && ((port->sm_vars
1134 & AD_PORT_LACP_ENABLED) == 0))
1135 port->sm_rx_state = AD_RX_LACP_DISABLED;
1136 break;
1137 default:
1138 break;
1139
1140 }
1141 }
1142 }
1143
1144 /* check if the State machine was changed or new lacpdu arrived */
1145 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1146 slave_dbg(port->slave->bond->dev, port->slave->dev,
1147 "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1148 port->actor_port_number,
1149 last_state,
1150 port->sm_rx_state);
1151 switch (port->sm_rx_state) {
1152 case AD_RX_INITIALIZE:
1153 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1154 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1155 else
1156 port->sm_vars |= AD_PORT_LACP_ENABLED;
1157 port->sm_vars &= ~AD_PORT_SELECTED;
1158 __record_default(port);
1159 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1160 port->sm_rx_state = AD_RX_PORT_DISABLED;
1161
1162 /* Fall Through */
1163 case AD_RX_PORT_DISABLED:
1164 port->sm_vars &= ~AD_PORT_MATCHED;
1165 break;
1166 case AD_RX_LACP_DISABLED:
1167 port->sm_vars &= ~AD_PORT_SELECTED;
1168 __record_default(port);
1169 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1170 port->sm_vars |= AD_PORT_MATCHED;
1171 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1172 break;
1173 case AD_RX_EXPIRED:
1174 /* Reset of the Synchronization flag (Standard 43.4.12)
1175 * This reset cause to disable this port in the
1176 * COLLECTING_DISTRIBUTING state of the mux machine in
1177 * case of EXPIRED even if LINK_DOWN didn't arrive for
1178 * the port.
1179 */
1180 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1181 port->sm_vars &= ~AD_PORT_MATCHED;
1182 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
1183 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1184 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1185 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1186 port->sm_vars |= AD_PORT_CHURNED;
1187 break;
1188 case AD_RX_DEFAULTED:
1189 __update_default_selected(port);
1190 __record_default(port);
1191 port->sm_vars |= AD_PORT_MATCHED;
1192 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1193 break;
1194 case AD_RX_CURRENT:
1195 /* detect loopback situation */
1196 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1197 &(port->actor_system))) {
1198 slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n"
1199 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n");
1200 return;
1201 }
1202 __update_selected(lacpdu, port);
1203 __update_ntt(lacpdu, port);
1204 __record_pdu(lacpdu, port);
1205 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1206 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1207 break;
1208 default:
1209 break;
1210 }
1211 }
1212}
1213
1214/**
1215 * ad_churn_machine - handle port churn's state machine
1216 * @port: the port we're looking at
1217 *
1218 */
1219static void ad_churn_machine(struct port *port)
1220{
1221 if (port->sm_vars & AD_PORT_CHURNED) {
1222 port->sm_vars &= ~AD_PORT_CHURNED;
1223 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1224 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1225 port->sm_churn_actor_timer_counter =
1226 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1227 port->sm_churn_partner_timer_counter =
1228 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1229 return;
1230 }
1231 if (port->sm_churn_actor_timer_counter &&
1232 !(--port->sm_churn_actor_timer_counter) &&
1233 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1234 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1235 port->sm_churn_actor_state = AD_NO_CHURN;
1236 } else {
1237 port->churn_actor_count++;
1238 port->sm_churn_actor_state = AD_CHURN;
1239 }
1240 }
1241 if (port->sm_churn_partner_timer_counter &&
1242 !(--port->sm_churn_partner_timer_counter) &&
1243 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1244 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1245 port->sm_churn_partner_state = AD_NO_CHURN;
1246 } else {
1247 port->churn_partner_count++;
1248 port->sm_churn_partner_state = AD_CHURN;
1249 }
1250 }
1251}
1252
1253/**
1254 * ad_tx_machine - handle a port's tx state machine
1255 * @port: the port we're looking at
1256 */
1257static void ad_tx_machine(struct port *port)
1258{
1259 /* check if tx timer expired, to verify that we do not send more than
1260 * 3 packets per second
1261 */
1262 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1263 /* check if there is something to send */
1264 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1265 __update_lacpdu_from_port(port);
1266
1267 if (ad_lacpdu_send(port) >= 0) {
1268 slave_dbg(port->slave->bond->dev,
1269 port->slave->dev,
1270 "Sent LACPDU on port %d\n",
1271 port->actor_port_number);
1272
1273 /* mark ntt as false, so it will not be sent
1274 * again until demanded
1275 */
1276 port->ntt = false;
1277 }
1278 }
1279 /* restart tx timer(to verify that we will not exceed
1280 * AD_MAX_TX_IN_SECOND
1281 */
1282 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1283 }
1284}
1285
1286/**
1287 * ad_periodic_machine - handle a port's periodic state machine
1288 * @port: the port we're looking at
1289 *
1290 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1291 */
1292static void ad_periodic_machine(struct port *port)
1293{
1294 periodic_states_t last_state;
1295
1296 /* keep current state machine state to compare later if it was changed */
1297 last_state = port->sm_periodic_state;
1298
1299 /* check if port was reinitialized */
1300 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1301 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1302 ) {
1303 port->sm_periodic_state = AD_NO_PERIODIC;
1304 }
1305 /* check if state machine should change state */
1306 else if (port->sm_periodic_timer_counter) {
1307 /* check if periodic state machine expired */
1308 if (!(--port->sm_periodic_timer_counter)) {
1309 /* if expired then do tx */
1310 port->sm_periodic_state = AD_PERIODIC_TX;
1311 } else {
1312 /* If not expired, check if there is some new timeout
1313 * parameter from the partner state
1314 */
1315 switch (port->sm_periodic_state) {
1316 case AD_FAST_PERIODIC:
1317 if (!(port->partner_oper.port_state
1318 & AD_STATE_LACP_TIMEOUT))
1319 port->sm_periodic_state = AD_SLOW_PERIODIC;
1320 break;
1321 case AD_SLOW_PERIODIC:
1322 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1323 port->sm_periodic_timer_counter = 0;
1324 port->sm_periodic_state = AD_PERIODIC_TX;
1325 }
1326 break;
1327 default:
1328 break;
1329 }
1330 }
1331 } else {
1332 switch (port->sm_periodic_state) {
1333 case AD_NO_PERIODIC:
1334 port->sm_periodic_state = AD_FAST_PERIODIC;
1335 break;
1336 case AD_PERIODIC_TX:
1337 if (!(port->partner_oper.port_state &
1338 AD_STATE_LACP_TIMEOUT))
1339 port->sm_periodic_state = AD_SLOW_PERIODIC;
1340 else
1341 port->sm_periodic_state = AD_FAST_PERIODIC;
1342 break;
1343 default:
1344 break;
1345 }
1346 }
1347
1348 /* check if the state machine was changed */
1349 if (port->sm_periodic_state != last_state) {
1350 slave_dbg(port->slave->bond->dev, port->slave->dev,
1351 "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1352 port->actor_port_number, last_state,
1353 port->sm_periodic_state);
1354 switch (port->sm_periodic_state) {
1355 case AD_NO_PERIODIC:
1356 port->sm_periodic_timer_counter = 0;
1357 break;
1358 case AD_FAST_PERIODIC:
1359 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1360 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1361 break;
1362 case AD_SLOW_PERIODIC:
1363 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1364 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1365 break;
1366 case AD_PERIODIC_TX:
1367 port->ntt = true;
1368 break;
1369 default:
1370 break;
1371 }
1372 }
1373}
1374
1375/**
1376 * ad_port_selection_logic - select aggregation groups
1377 * @port: the port we're looking at
1378 * @update_slave_arr: Does slave array need update?
1379 *
1380 * Select aggregation groups, and assign each port for it's aggregetor. The
1381 * selection logic is called in the inititalization (after all the handshkes),
1382 * and after every lacpdu receive (if selected is off).
1383 */
1384static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1385{
1386 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1387 struct port *last_port = NULL, *curr_port;
1388 struct list_head *iter;
1389 struct bonding *bond;
1390 struct slave *slave;
1391 int found = 0;
1392
1393 /* if the port is already Selected, do nothing */
1394 if (port->sm_vars & AD_PORT_SELECTED)
1395 return;
1396
1397 bond = __get_bond_by_port(port);
1398
1399 /* if the port is connected to other aggregator, detach it */
1400 if (port->aggregator) {
1401 /* detach the port from its former aggregator */
1402 temp_aggregator = port->aggregator;
1403 for (curr_port = temp_aggregator->lag_ports; curr_port;
1404 last_port = curr_port,
1405 curr_port = curr_port->next_port_in_aggregator) {
1406 if (curr_port == port) {
1407 temp_aggregator->num_of_ports--;
1408 /* if it is the first port attached to the
1409 * aggregator
1410 */
1411 if (!last_port) {
1412 temp_aggregator->lag_ports =
1413 port->next_port_in_aggregator;
1414 } else {
1415 /* not the first port attached to the
1416 * aggregator
1417 */
1418 last_port->next_port_in_aggregator =
1419 port->next_port_in_aggregator;
1420 }
1421
1422 /* clear the port's relations to this
1423 * aggregator
1424 */
1425 port->aggregator = NULL;
1426 port->next_port_in_aggregator = NULL;
1427 port->actor_port_aggregator_identifier = 0;
1428
1429 slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n",
1430 port->actor_port_number,
1431 temp_aggregator->aggregator_identifier);
1432 /* if the aggregator is empty, clear its
1433 * parameters, and set it ready to be attached
1434 */
1435 if (!temp_aggregator->lag_ports)
1436 ad_clear_agg(temp_aggregator);
1437 break;
1438 }
1439 }
1440 if (!curr_port) {
1441 /* meaning: the port was related to an aggregator
1442 * but was not on the aggregator port list
1443 */
1444 net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n",
1445 port->slave->bond->dev->name,
1446 port->slave->dev->name,
1447 port->actor_port_number,
1448 port->aggregator->aggregator_identifier);
1449 }
1450 }
1451 /* search on all aggregators for a suitable aggregator for this port */
1452 bond_for_each_slave(bond, slave, iter) {
1453 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1454
1455 /* keep a free aggregator for later use(if needed) */
1456 if (!aggregator->lag_ports) {
1457 if (!free_aggregator)
1458 free_aggregator = aggregator;
1459 continue;
1460 }
1461 /* check if current aggregator suits us */
1462 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1463 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1464 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1465 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1466 ) &&
1467 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1468 !aggregator->is_individual) /* but is not individual OR */
1469 )
1470 ) {
1471 /* attach to the founded aggregator */
1472 port->aggregator = aggregator;
1473 port->actor_port_aggregator_identifier =
1474 port->aggregator->aggregator_identifier;
1475 port->next_port_in_aggregator = aggregator->lag_ports;
1476 port->aggregator->num_of_ports++;
1477 aggregator->lag_ports = port;
1478 slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n",
1479 port->actor_port_number,
1480 port->aggregator->aggregator_identifier);
1481
1482 /* mark this port as selected */
1483 port->sm_vars |= AD_PORT_SELECTED;
1484 found = 1;
1485 break;
1486 }
1487 }
1488
1489 /* the port couldn't find an aggregator - attach it to a new
1490 * aggregator
1491 */
1492 if (!found) {
1493 if (free_aggregator) {
1494 /* assign port a new aggregator */
1495 port->aggregator = free_aggregator;
1496 port->actor_port_aggregator_identifier =
1497 port->aggregator->aggregator_identifier;
1498
1499 /* update the new aggregator's parameters
1500 * if port was responsed from the end-user
1501 */
1502 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1503 /* if port is full duplex */
1504 port->aggregator->is_individual = false;
1505 else
1506 port->aggregator->is_individual = true;
1507
1508 port->aggregator->actor_admin_aggregator_key =
1509 port->actor_admin_port_key;
1510 port->aggregator->actor_oper_aggregator_key =
1511 port->actor_oper_port_key;
1512 port->aggregator->partner_system =
1513 port->partner_oper.system;
1514 port->aggregator->partner_system_priority =
1515 port->partner_oper.system_priority;
1516 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1517 port->aggregator->receive_state = 1;
1518 port->aggregator->transmit_state = 1;
1519 port->aggregator->lag_ports = port;
1520 port->aggregator->num_of_ports++;
1521
1522 /* mark this port as selected */
1523 port->sm_vars |= AD_PORT_SELECTED;
1524
1525 slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n",
1526 port->actor_port_number,
1527 port->aggregator->aggregator_identifier);
1528 } else {
1529 slave_err(bond->dev, port->slave->dev,
1530 "Port %d did not find a suitable aggregator\n",
1531 port->actor_port_number);
1532 }
1533 }
1534 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1535 * in all aggregator's ports, else set ready=FALSE in all
1536 * aggregator's ports
1537 */
1538 __set_agg_ports_ready(port->aggregator,
1539 __agg_ports_are_ready(port->aggregator));
1540
1541 aggregator = __get_first_agg(port);
1542 ad_agg_selection_logic(aggregator, update_slave_arr);
1543
1544 if (!port->aggregator->is_active)
1545 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1546}
1547
1548/* Decide if "agg" is a better choice for the new active aggregator that
1549 * the current best, according to the ad_select policy.
1550 */
1551static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1552 struct aggregator *curr)
1553{
1554 /* 0. If no best, select current.
1555 *
1556 * 1. If the current agg is not individual, and the best is
1557 * individual, select current.
1558 *
1559 * 2. If current agg is individual and the best is not, keep best.
1560 *
1561 * 3. Therefore, current and best are both individual or both not
1562 * individual, so:
1563 *
1564 * 3a. If current agg partner replied, and best agg partner did not,
1565 * select current.
1566 *
1567 * 3b. If current agg partner did not reply and best agg partner
1568 * did reply, keep best.
1569 *
1570 * 4. Therefore, current and best both have partner replies or
1571 * both do not, so perform selection policy:
1572 *
1573 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1574 * select by bandwidth.
1575 *
1576 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1577 */
1578 if (!best)
1579 return curr;
1580
1581 if (!curr->is_individual && best->is_individual)
1582 return curr;
1583
1584 if (curr->is_individual && !best->is_individual)
1585 return best;
1586
1587 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1588 return curr;
1589
1590 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1591 return best;
1592
1593 switch (__get_agg_selection_mode(curr->lag_ports)) {
1594 case BOND_AD_COUNT:
1595 if (__agg_active_ports(curr) > __agg_active_ports(best))
1596 return curr;
1597
1598 if (__agg_active_ports(curr) < __agg_active_ports(best))
1599 return best;
1600
1601 /*FALLTHROUGH*/
1602 case BOND_AD_STABLE:
1603 case BOND_AD_BANDWIDTH:
1604 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1605 return curr;
1606
1607 break;
1608
1609 default:
1610 net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n",
1611 curr->slave->bond->dev->name,
1612 curr->slave->dev->name,
1613 __get_agg_selection_mode(curr->lag_ports));
1614 break;
1615 }
1616
1617 return best;
1618}
1619
1620static int agg_device_up(const struct aggregator *agg)
1621{
1622 struct port *port = agg->lag_ports;
1623
1624 if (!port)
1625 return 0;
1626
1627 for (port = agg->lag_ports; port;
1628 port = port->next_port_in_aggregator) {
1629 if (netif_running(port->slave->dev) &&
1630 netif_carrier_ok(port->slave->dev))
1631 return 1;
1632 }
1633
1634 return 0;
1635}
1636
1637/**
1638 * ad_agg_selection_logic - select an aggregation group for a team
1639 * @aggregator: the aggregator we're looking at
1640 * @update_slave_arr: Does slave array need update?
1641 *
1642 * It is assumed that only one aggregator may be selected for a team.
1643 *
1644 * The logic of this function is to select the aggregator according to
1645 * the ad_select policy:
1646 *
1647 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1648 * it, and to reselect the active aggregator only if the previous
1649 * aggregator has no more ports related to it.
1650 *
1651 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1652 * bandwidth, and reselect whenever a link state change takes place or the
1653 * set of slaves in the bond changes.
1654 *
1655 * BOND_AD_COUNT: select the aggregator with largest number of ports
1656 * (slaves), and reselect whenever a link state change takes place or the
1657 * set of slaves in the bond changes.
1658 *
1659 * FIXME: this function MUST be called with the first agg in the bond, or
1660 * __get_active_agg() won't work correctly. This function should be better
1661 * called with the bond itself, and retrieve the first agg from it.
1662 */
1663static void ad_agg_selection_logic(struct aggregator *agg,
1664 bool *update_slave_arr)
1665{
1666 struct aggregator *best, *active, *origin;
1667 struct bonding *bond = agg->slave->bond;
1668 struct list_head *iter;
1669 struct slave *slave;
1670 struct port *port;
1671
1672 rcu_read_lock();
1673 origin = agg;
1674 active = __get_active_agg(agg);
1675 best = (active && agg_device_up(active)) ? active : NULL;
1676
1677 bond_for_each_slave_rcu(bond, slave, iter) {
1678 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1679
1680 agg->is_active = 0;
1681
1682 if (__agg_active_ports(agg) && agg_device_up(agg))
1683 best = ad_agg_selection_test(best, agg);
1684 }
1685
1686 if (best &&
1687 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1688 /* For the STABLE policy, don't replace the old active
1689 * aggregator if it's still active (it has an answering
1690 * partner) or if both the best and active don't have an
1691 * answering partner.
1692 */
1693 if (active && active->lag_ports &&
1694 __agg_active_ports(active) &&
1695 (__agg_has_partner(active) ||
1696 (!__agg_has_partner(active) &&
1697 !__agg_has_partner(best)))) {
1698 if (!(!active->actor_oper_aggregator_key &&
1699 best->actor_oper_aggregator_key)) {
1700 best = NULL;
1701 active->is_active = 1;
1702 }
1703 }
1704 }
1705
1706 if (best && (best == active)) {
1707 best = NULL;
1708 active->is_active = 1;
1709 }
1710
1711 /* if there is new best aggregator, activate it */
1712 if (best) {
1713 netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1714 best->slave ? best->slave->dev->name : "NULL",
1715 best->aggregator_identifier, best->num_of_ports,
1716 best->actor_oper_aggregator_key,
1717 best->partner_oper_aggregator_key,
1718 best->is_individual, best->is_active);
1719 netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n",
1720 best->slave ? best->slave->dev->name : "NULL",
1721 best->lag_ports, best->slave);
1722
1723 bond_for_each_slave_rcu(bond, slave, iter) {
1724 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1725
1726 slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1727 agg->aggregator_identifier, agg->num_of_ports,
1728 agg->actor_oper_aggregator_key,
1729 agg->partner_oper_aggregator_key,
1730 agg->is_individual, agg->is_active);
1731 }
1732
1733 /* check if any partner replies */
1734 if (best->is_individual)
1735 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1736 bond->dev->name);
1737
1738 best->is_active = 1;
1739 netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n",
1740 best->slave ? best->slave->dev->name : "NULL",
1741 best->aggregator_identifier);
1742 netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1743 best->slave ? best->slave->dev->name : "NULL",
1744 best->aggregator_identifier, best->num_of_ports,
1745 best->actor_oper_aggregator_key,
1746 best->partner_oper_aggregator_key,
1747 best->is_individual, best->is_active);
1748
1749 /* disable the ports that were related to the former
1750 * active_aggregator
1751 */
1752 if (active) {
1753 for (port = active->lag_ports; port;
1754 port = port->next_port_in_aggregator) {
1755 __disable_port(port);
1756 }
1757 }
1758 /* Slave array needs update. */
1759 *update_slave_arr = true;
1760 }
1761
1762 /* if the selected aggregator is of join individuals
1763 * (partner_system is NULL), enable their ports
1764 */
1765 active = __get_active_agg(origin);
1766
1767 if (active) {
1768 if (!__agg_has_partner(active)) {
1769 for (port = active->lag_ports; port;
1770 port = port->next_port_in_aggregator) {
1771 __enable_port(port);
1772 }
1773 }
1774 }
1775
1776 rcu_read_unlock();
1777
1778 bond_3ad_set_carrier(bond);
1779}
1780
1781/**
1782 * ad_clear_agg - clear a given aggregator's parameters
1783 * @aggregator: the aggregator we're looking at
1784 */
1785static void ad_clear_agg(struct aggregator *aggregator)
1786{
1787 if (aggregator) {
1788 aggregator->is_individual = false;
1789 aggregator->actor_admin_aggregator_key = 0;
1790 aggregator->actor_oper_aggregator_key = 0;
1791 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1792 aggregator->partner_system_priority = 0;
1793 aggregator->partner_oper_aggregator_key = 0;
1794 aggregator->receive_state = 0;
1795 aggregator->transmit_state = 0;
1796 aggregator->lag_ports = NULL;
1797 aggregator->is_active = 0;
1798 aggregator->num_of_ports = 0;
1799 pr_debug("%s: LAG %d was cleared\n",
1800 aggregator->slave ?
1801 aggregator->slave->dev->name : "NULL",
1802 aggregator->aggregator_identifier);
1803 }
1804}
1805
1806/**
1807 * ad_initialize_agg - initialize a given aggregator's parameters
1808 * @aggregator: the aggregator we're looking at
1809 */
1810static void ad_initialize_agg(struct aggregator *aggregator)
1811{
1812 if (aggregator) {
1813 ad_clear_agg(aggregator);
1814
1815 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1816 aggregator->aggregator_identifier = 0;
1817 aggregator->slave = NULL;
1818 }
1819}
1820
1821/**
1822 * ad_initialize_port - initialize a given port's parameters
1823 * @aggregator: the aggregator we're looking at
1824 * @lacp_fast: boolean. whether fast periodic should be used
1825 */
1826static void ad_initialize_port(struct port *port, int lacp_fast)
1827{
1828 static const struct port_params tmpl = {
1829 .system_priority = 0xffff,
1830 .key = 1,
1831 .port_number = 1,
1832 .port_priority = 0xff,
1833 .port_state = 1,
1834 };
1835 static const struct lacpdu lacpdu = {
1836 .subtype = 0x01,
1837 .version_number = 0x01,
1838 .tlv_type_actor_info = 0x01,
1839 .actor_information_length = 0x14,
1840 .tlv_type_partner_info = 0x02,
1841 .partner_information_length = 0x14,
1842 .tlv_type_collector_info = 0x03,
1843 .collector_information_length = 0x10,
1844 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1845 };
1846
1847 if (port) {
1848 port->actor_port_priority = 0xff;
1849 port->actor_port_aggregator_identifier = 0;
1850 port->ntt = false;
1851 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1852 AD_STATE_LACP_ACTIVITY;
1853 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1854 AD_STATE_LACP_ACTIVITY;
1855
1856 if (lacp_fast)
1857 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1858
1859 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1860 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1861
1862 port->is_enabled = true;
1863 /* private parameters */
1864 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1865 port->sm_rx_state = 0;
1866 port->sm_rx_timer_counter = 0;
1867 port->sm_periodic_state = 0;
1868 port->sm_periodic_timer_counter = 0;
1869 port->sm_mux_state = 0;
1870 port->sm_mux_timer_counter = 0;
1871 port->sm_tx_state = 0;
1872 port->aggregator = NULL;
1873 port->next_port_in_aggregator = NULL;
1874 port->transaction_id = 0;
1875
1876 port->sm_churn_actor_timer_counter = 0;
1877 port->sm_churn_actor_state = 0;
1878 port->churn_actor_count = 0;
1879 port->sm_churn_partner_timer_counter = 0;
1880 port->sm_churn_partner_state = 0;
1881 port->churn_partner_count = 0;
1882
1883 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1884 }
1885}
1886
1887/**
1888 * ad_enable_collecting_distributing - enable a port's transmit/receive
1889 * @port: the port we're looking at
1890 * @update_slave_arr: Does slave array need update?
1891 *
1892 * Enable @port if it's in an active aggregator
1893 */
1894static void ad_enable_collecting_distributing(struct port *port,
1895 bool *update_slave_arr)
1896{
1897 if (port->aggregator->is_active) {
1898 slave_dbg(port->slave->bond->dev, port->slave->dev,
1899 "Enabling port %d (LAG %d)\n",
1900 port->actor_port_number,
1901 port->aggregator->aggregator_identifier);
1902 __enable_port(port);
1903 /* Slave array needs update */
1904 *update_slave_arr = true;
1905 }
1906}
1907
1908/**
1909 * ad_disable_collecting_distributing - disable a port's transmit/receive
1910 * @port: the port we're looking at
1911 * @update_slave_arr: Does slave array need update?
1912 */
1913static void ad_disable_collecting_distributing(struct port *port,
1914 bool *update_slave_arr)
1915{
1916 if (port->aggregator &&
1917 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1918 &(null_mac_addr))) {
1919 slave_dbg(port->slave->bond->dev, port->slave->dev,
1920 "Disabling port %d (LAG %d)\n",
1921 port->actor_port_number,
1922 port->aggregator->aggregator_identifier);
1923 __disable_port(port);
1924 /* Slave array needs an update */
1925 *update_slave_arr = true;
1926 }
1927}
1928
1929/**
1930 * ad_marker_info_received - handle receive of a Marker information frame
1931 * @marker_info: Marker info received
1932 * @port: the port we're looking at
1933 */
1934static void ad_marker_info_received(struct bond_marker *marker_info,
1935 struct port *port)
1936{
1937 struct bond_marker marker;
1938
1939 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);
1940 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);
1941
1942 /* copy the received marker data to the response marker */
1943 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1944 /* change the marker subtype to marker response */
1945 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1946
1947 /* send the marker response */
1948 if (ad_marker_send(port, &marker) >= 0)
1949 slave_dbg(port->slave->bond->dev, port->slave->dev,
1950 "Sent Marker Response on port %d\n",
1951 port->actor_port_number);
1952}
1953
1954/**
1955 * ad_marker_response_received - handle receive of a marker response frame
1956 * @marker: marker PDU received
1957 * @port: the port we're looking at
1958 *
1959 * This function does nothing since we decided not to implement send and handle
1960 * response for marker PDU's, in this stage, but only to respond to marker
1961 * information.
1962 */
1963static void ad_marker_response_received(struct bond_marker *marker,
1964 struct port *port)
1965{
1966 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);
1967 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);
1968
1969 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1970}
1971
1972/* ========= AD exported functions to the main bonding code ========= */
1973
1974/* Check aggregators status in team every T seconds */
1975#define AD_AGGREGATOR_SELECTION_TIMER 8
1976
1977/**
1978 * bond_3ad_initiate_agg_selection - initate aggregator selection
1979 * @bond: bonding struct
1980 *
1981 * Set the aggregation selection timer, to initiate an agg selection in
1982 * the very near future. Called during first initialization, and during
1983 * any down to up transitions of the bond.
1984 */
1985void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1986{
1987 BOND_AD_INFO(bond).agg_select_timer = timeout;
1988}
1989
1990/**
1991 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1992 * @bond: bonding struct to work on
1993 * @tick_resolution: tick duration (millisecond resolution)
1994 *
1995 * Can be called only after the mac address of the bond is set.
1996 */
1997void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1998{
1999 /* check that the bond is not initialized yet */
2000 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
2001 bond->dev->dev_addr)) {
2002
2003 BOND_AD_INFO(bond).aggregator_identifier = 0;
2004
2005 BOND_AD_INFO(bond).system.sys_priority =
2006 bond->params.ad_actor_sys_prio;
2007 if (is_zero_ether_addr(bond->params.ad_actor_system))
2008 BOND_AD_INFO(bond).system.sys_mac_addr =
2009 *((struct mac_addr *)bond->dev->dev_addr);
2010 else
2011 BOND_AD_INFO(bond).system.sys_mac_addr =
2012 *((struct mac_addr *)bond->params.ad_actor_system);
2013
2014 /* initialize how many times this module is called in one
2015 * second (should be about every 100ms)
2016 */
2017 ad_ticks_per_sec = tick_resolution;
2018
2019 bond_3ad_initiate_agg_selection(bond,
2020 AD_AGGREGATOR_SELECTION_TIMER *
2021 ad_ticks_per_sec);
2022 }
2023}
2024
2025/**
2026 * bond_3ad_bind_slave - initialize a slave's port
2027 * @slave: slave struct to work on
2028 *
2029 * Returns: 0 on success
2030 * < 0 on error
2031 */
2032void bond_3ad_bind_slave(struct slave *slave)
2033{
2034 struct bonding *bond = bond_get_bond_by_slave(slave);
2035 struct port *port;
2036 struct aggregator *aggregator;
2037
2038 /* check that the slave has not been initialized yet. */
2039 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
2040
2041 /* port initialization */
2042 port = &(SLAVE_AD_INFO(slave)->port);
2043
2044 ad_initialize_port(port, bond->params.lacp_fast);
2045
2046 port->slave = slave;
2047 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
2048 /* key is determined according to the link speed, duplex and
2049 * user key
2050 */
2051 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
2052 ad_update_actor_keys(port, false);
2053 /* actor system is the bond's system */
2054 __ad_actor_update_port(port);
2055 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
2056 * lacpdu's are sent in one second)
2057 */
2058 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
2059
2060 __disable_port(port);
2061
2062 /* aggregator initialization */
2063 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2064
2065 ad_initialize_agg(aggregator);
2066
2067 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2068 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2069 aggregator->slave = slave;
2070 aggregator->is_active = 0;
2071 aggregator->num_of_ports = 0;
2072 }
2073}
2074
2075/**
2076 * bond_3ad_unbind_slave - deinitialize a slave's port
2077 * @slave: slave struct to work on
2078 *
2079 * Search for the aggregator that is related to this port, remove the
2080 * aggregator and assign another aggregator for other port related to it
2081 * (if any), and remove the port.
2082 */
2083void bond_3ad_unbind_slave(struct slave *slave)
2084{
2085 struct port *port, *prev_port, *temp_port;
2086 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2087 int select_new_active_agg = 0;
2088 struct bonding *bond = slave->bond;
2089 struct slave *slave_iter;
2090 struct list_head *iter;
2091 bool dummy_slave_update; /* Ignore this value as caller updates array */
2092
2093 /* Sync against bond_3ad_state_machine_handler() */
2094 spin_lock_bh(&bond->mode_lock);
2095 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2096 port = &(SLAVE_AD_INFO(slave)->port);
2097
2098 /* if slave is null, the whole port is not initialized */
2099 if (!port->slave) {
2100 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");
2101 goto out;
2102 }
2103
2104 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",
2105 aggregator->aggregator_identifier);
2106
2107 /* Tell the partner that this port is not suitable for aggregation */
2108 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
2109 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
2110 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
2111 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2112 __update_lacpdu_from_port(port);
2113 ad_lacpdu_send(port);
2114
2115 /* check if this aggregator is occupied */
2116 if (aggregator->lag_ports) {
2117 /* check if there are other ports related to this aggregator
2118 * except the port related to this slave(thats ensure us that
2119 * there is a reason to search for new aggregator, and that we
2120 * will find one
2121 */
2122 if ((aggregator->lag_ports != port) ||
2123 (aggregator->lag_ports->next_port_in_aggregator)) {
2124 /* find new aggregator for the related port(s) */
2125 bond_for_each_slave(bond, slave_iter, iter) {
2126 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2127 /* if the new aggregator is empty, or it is
2128 * connected to our port only
2129 */
2130 if (!new_aggregator->lag_ports ||
2131 ((new_aggregator->lag_ports == port) &&
2132 !new_aggregator->lag_ports->next_port_in_aggregator))
2133 break;
2134 }
2135 if (!slave_iter)
2136 new_aggregator = NULL;
2137
2138 /* if new aggregator found, copy the aggregator's
2139 * parameters and connect the related lag_ports to the
2140 * new aggregator
2141 */
2142 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2143 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2144 aggregator->aggregator_identifier,
2145 new_aggregator->aggregator_identifier);
2146
2147 if ((new_aggregator->lag_ports == port) &&
2148 new_aggregator->is_active) {
2149 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2150 select_new_active_agg = 1;
2151 }
2152
2153 new_aggregator->is_individual = aggregator->is_individual;
2154 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2155 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2156 new_aggregator->partner_system = aggregator->partner_system;
2157 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2158 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2159 new_aggregator->receive_state = aggregator->receive_state;
2160 new_aggregator->transmit_state = aggregator->transmit_state;
2161 new_aggregator->lag_ports = aggregator->lag_ports;
2162 new_aggregator->is_active = aggregator->is_active;
2163 new_aggregator->num_of_ports = aggregator->num_of_ports;
2164
2165 /* update the information that is written on
2166 * the ports about the aggregator
2167 */
2168 for (temp_port = aggregator->lag_ports; temp_port;
2169 temp_port = temp_port->next_port_in_aggregator) {
2170 temp_port->aggregator = new_aggregator;
2171 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2172 }
2173
2174 ad_clear_agg(aggregator);
2175
2176 if (select_new_active_agg)
2177 ad_agg_selection_logic(__get_first_agg(port),
2178 &dummy_slave_update);
2179 } else {
2180 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2181 }
2182 } else {
2183 /* in case that the only port related to this
2184 * aggregator is the one we want to remove
2185 */
2186 select_new_active_agg = aggregator->is_active;
2187 ad_clear_agg(aggregator);
2188 if (select_new_active_agg) {
2189 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2190 /* select new active aggregator */
2191 temp_aggregator = __get_first_agg(port);
2192 if (temp_aggregator)
2193 ad_agg_selection_logic(temp_aggregator,
2194 &dummy_slave_update);
2195 }
2196 }
2197 }
2198
2199 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);
2200
2201 /* find the aggregator that this port is connected to */
2202 bond_for_each_slave(bond, slave_iter, iter) {
2203 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2204 prev_port = NULL;
2205 /* search the port in the aggregator's related ports */
2206 for (temp_port = temp_aggregator->lag_ports; temp_port;
2207 prev_port = temp_port,
2208 temp_port = temp_port->next_port_in_aggregator) {
2209 if (temp_port == port) {
2210 /* the aggregator found - detach the port from
2211 * this aggregator
2212 */
2213 if (prev_port)
2214 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2215 else
2216 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2217 temp_aggregator->num_of_ports--;
2218 if (__agg_active_ports(temp_aggregator) == 0) {
2219 select_new_active_agg = temp_aggregator->is_active;
2220 ad_clear_agg(temp_aggregator);
2221 if (select_new_active_agg) {
2222 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2223 /* select new active aggregator */
2224 ad_agg_selection_logic(__get_first_agg(port),
2225 &dummy_slave_update);
2226 }
2227 }
2228 break;
2229 }
2230 }
2231 }
2232 port->slave = NULL;
2233
2234out:
2235 spin_unlock_bh(&bond->mode_lock);
2236}
2237
2238/**
2239 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2240 * @bond: bonding struct to work on
2241 *
2242 * If an ad_actor setting gets changed we need to update the individual port
2243 * settings so the bond device will use the new values when it gets upped.
2244 */
2245void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2246{
2247 struct list_head *iter;
2248 struct slave *slave;
2249
2250 ASSERT_RTNL();
2251
2252 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2253 if (is_zero_ether_addr(bond->params.ad_actor_system))
2254 BOND_AD_INFO(bond).system.sys_mac_addr =
2255 *((struct mac_addr *)bond->dev->dev_addr);
2256 else
2257 BOND_AD_INFO(bond).system.sys_mac_addr =
2258 *((struct mac_addr *)bond->params.ad_actor_system);
2259
2260 spin_lock_bh(&bond->mode_lock);
2261 bond_for_each_slave(bond, slave, iter) {
2262 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2263
2264 __ad_actor_update_port(port);
2265 port->ntt = true;
2266 }
2267 spin_unlock_bh(&bond->mode_lock);
2268}
2269
2270/**
2271 * bond_3ad_state_machine_handler - handle state machines timeout
2272 * @bond: bonding struct to work on
2273 *
2274 * The state machine handling concept in this module is to check every tick
2275 * which state machine should operate any function. The execution order is
2276 * round robin, so when we have an interaction between state machines, the
2277 * reply of one to each other might be delayed until next tick.
2278 *
2279 * This function also complete the initialization when the agg_select_timer
2280 * times out, and it selects an aggregator for the ports that are yet not
2281 * related to any aggregator, and selects the active aggregator for a bond.
2282 */
2283void bond_3ad_state_machine_handler(struct work_struct *work)
2284{
2285 struct bonding *bond = container_of(work, struct bonding,
2286 ad_work.work);
2287 struct aggregator *aggregator;
2288 struct list_head *iter;
2289 struct slave *slave;
2290 struct port *port;
2291 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2292 bool update_slave_arr = false;
2293
2294 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2295 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2296 * concurrently due to incoming LACPDU as well.
2297 */
2298 spin_lock_bh(&bond->mode_lock);
2299 rcu_read_lock();
2300
2301 /* check if there are any slaves */
2302 if (!bond_has_slaves(bond))
2303 goto re_arm;
2304
2305 /* check if agg_select_timer timer after initialize is timed out */
2306 if (BOND_AD_INFO(bond).agg_select_timer &&
2307 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2308 slave = bond_first_slave_rcu(bond);
2309 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2310
2311 /* select the active aggregator for the bond */
2312 if (port) {
2313 if (!port->slave) {
2314 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2315 bond->dev->name);
2316 goto re_arm;
2317 }
2318
2319 aggregator = __get_first_agg(port);
2320 ad_agg_selection_logic(aggregator, &update_slave_arr);
2321 }
2322 bond_3ad_set_carrier(bond);
2323 }
2324
2325 /* for each port run the state machines */
2326 bond_for_each_slave_rcu(bond, slave, iter) {
2327 port = &(SLAVE_AD_INFO(slave)->port);
2328 if (!port->slave) {
2329 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2330 bond->dev->name);
2331 goto re_arm;
2332 }
2333
2334 ad_rx_machine(NULL, port);
2335 ad_periodic_machine(port);
2336 ad_port_selection_logic(port, &update_slave_arr);
2337 ad_mux_machine(port, &update_slave_arr);
2338 ad_tx_machine(port);
2339 ad_churn_machine(port);
2340
2341 /* turn off the BEGIN bit, since we already handled it */
2342 if (port->sm_vars & AD_PORT_BEGIN)
2343 port->sm_vars &= ~AD_PORT_BEGIN;
2344 }
2345
2346re_arm:
2347 bond_for_each_slave_rcu(bond, slave, iter) {
2348 if (slave->should_notify) {
2349 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2350 break;
2351 }
2352 }
2353 rcu_read_unlock();
2354 spin_unlock_bh(&bond->mode_lock);
2355
2356 if (update_slave_arr)
2357 bond_slave_arr_work_rearm(bond, 0);
2358
2359 if (should_notify_rtnl && rtnl_trylock()) {
2360 bond_slave_state_notify(bond);
2361 rtnl_unlock();
2362 }
2363 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2364}
2365
2366/**
2367 * bond_3ad_rx_indication - handle a received frame
2368 * @lacpdu: received lacpdu
2369 * @slave: slave struct to work on
2370 *
2371 * It is assumed that frames that were sent on this NIC don't returned as new
2372 * received frames (loopback). Since only the payload is given to this
2373 * function, it check for loopback.
2374 */
2375static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)
2376{
2377 struct bonding *bond = slave->bond;
2378 int ret = RX_HANDLER_ANOTHER;
2379 struct bond_marker *marker;
2380 struct port *port;
2381 atomic64_t *stat;
2382
2383 port = &(SLAVE_AD_INFO(slave)->port);
2384 if (!port->slave) {
2385 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2386 slave->dev->name, slave->bond->dev->name);
2387 return ret;
2388 }
2389
2390 switch (lacpdu->subtype) {
2391 case AD_TYPE_LACPDU:
2392 ret = RX_HANDLER_CONSUMED;
2393 slave_dbg(slave->bond->dev, slave->dev,
2394 "Received LACPDU on port %d\n",
2395 port->actor_port_number);
2396 /* Protect against concurrent state machines */
2397 spin_lock(&slave->bond->mode_lock);
2398 ad_rx_machine(lacpdu, port);
2399 spin_unlock(&slave->bond->mode_lock);
2400 break;
2401 case AD_TYPE_MARKER:
2402 ret = RX_HANDLER_CONSUMED;
2403 /* No need to convert fields to Little Endian since we
2404 * don't use the marker's fields.
2405 */
2406 marker = (struct bond_marker *)lacpdu;
2407 switch (marker->tlv_type) {
2408 case AD_MARKER_INFORMATION_SUBTYPE:
2409 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",
2410 port->actor_port_number);
2411 ad_marker_info_received(marker, port);
2412 break;
2413 case AD_MARKER_RESPONSE_SUBTYPE:
2414 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",
2415 port->actor_port_number);
2416 ad_marker_response_received(marker, port);
2417 break;
2418 default:
2419 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",
2420 port->actor_port_number);
2421 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;
2422 atomic64_inc(stat);
2423 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;
2424 atomic64_inc(stat);
2425 }
2426 break;
2427 default:
2428 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);
2429 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);
2430 }
2431
2432 return ret;
2433}
2434
2435/**
2436 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2437 * its current speed and duplex settings.
2438 *
2439 * @port: the port we'are looking at
2440 * @reset: Boolean to just reset the speed and the duplex part of the key
2441 *
2442 * The logic to change the oper / admin keys is:
2443 * (a) A full duplex port can participate in LACP with partner.
2444 * (b) When the speed is changed, LACP need to be reinitiated.
2445 */
2446static void ad_update_actor_keys(struct port *port, bool reset)
2447{
2448 u8 duplex = 0;
2449 u16 ospeed = 0, speed = 0;
2450 u16 old_oper_key = port->actor_oper_port_key;
2451
2452 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2453 if (!reset) {
2454 speed = __get_link_speed(port);
2455 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2456 duplex = __get_duplex(port);
2457 port->actor_admin_port_key |= (speed << 1) | duplex;
2458 }
2459 port->actor_oper_port_key = port->actor_admin_port_key;
2460
2461 if (old_oper_key != port->actor_oper_port_key) {
2462 /* Only 'duplex' port participates in LACP */
2463 if (duplex)
2464 port->sm_vars |= AD_PORT_LACP_ENABLED;
2465 else
2466 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2467
2468 if (!reset) {
2469 if (!speed) {
2470 slave_err(port->slave->bond->dev,
2471 port->slave->dev,
2472 "speed changed to 0 on port %d\n",
2473 port->actor_port_number);
2474 } else if (duplex && ospeed != speed) {
2475 /* Speed change restarts LACP state-machine */
2476 port->sm_vars |= AD_PORT_BEGIN;
2477 }
2478 }
2479 }
2480}
2481
2482/**
2483 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2484 * change indication
2485 *
2486 * @slave: slave struct to work on
2487 *
2488 * Handle reselection of aggregator (if needed) for this port.
2489 */
2490void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2491{
2492 struct port *port;
2493
2494 port = &(SLAVE_AD_INFO(slave)->port);
2495
2496 /* if slave is null, the whole port is not initialized */
2497 if (!port->slave) {
2498 slave_warn(slave->bond->dev, slave->dev,
2499 "speed/duplex changed for uninitialized port\n");
2500 return;
2501 }
2502
2503 spin_lock_bh(&slave->bond->mode_lock);
2504 ad_update_actor_keys(port, false);
2505 spin_unlock_bh(&slave->bond->mode_lock);
2506 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",
2507 port->actor_port_number);
2508}
2509
2510/**
2511 * bond_3ad_handle_link_change - handle a slave's link status change indication
2512 * @slave: slave struct to work on
2513 * @status: whether the link is now up or down
2514 *
2515 * Handle reselection of aggregator (if needed) for this port.
2516 */
2517void bond_3ad_handle_link_change(struct slave *slave, char link)
2518{
2519 struct aggregator *agg;
2520 struct port *port;
2521 bool dummy;
2522
2523 port = &(SLAVE_AD_INFO(slave)->port);
2524
2525 /* if slave is null, the whole port is not initialized */
2526 if (!port->slave) {
2527 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");
2528 return;
2529 }
2530
2531 spin_lock_bh(&slave->bond->mode_lock);
2532 /* on link down we are zeroing duplex and speed since
2533 * some of the adaptors(ce1000.lan) report full duplex/speed
2534 * instead of N/A(duplex) / 0(speed).
2535 *
2536 * on link up we are forcing recheck on the duplex and speed since
2537 * some of he adaptors(ce1000.lan) report.
2538 */
2539 if (link == BOND_LINK_UP) {
2540 port->is_enabled = true;
2541 ad_update_actor_keys(port, false);
2542 } else {
2543 /* link has failed */
2544 port->is_enabled = false;
2545 ad_update_actor_keys(port, true);
2546 }
2547 agg = __get_first_agg(port);
2548 ad_agg_selection_logic(agg, &dummy);
2549
2550 spin_unlock_bh(&slave->bond->mode_lock);
2551
2552 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",
2553 port->actor_port_number,
2554 link == BOND_LINK_UP ? "UP" : "DOWN");
2555
2556 /* RTNL is held and mode_lock is released so it's safe
2557 * to update slave_array here.
2558 */
2559 bond_update_slave_arr(slave->bond, NULL);
2560}
2561
2562/**
2563 * bond_3ad_set_carrier - set link state for bonding master
2564 * @bond - bonding structure
2565 *
2566 * if we have an active aggregator, we're up, if not, we're down.
2567 * Presumes that we cannot have an active aggregator if there are
2568 * no slaves with link up.
2569 *
2570 * This behavior complies with IEEE 802.3 section 43.3.9.
2571 *
2572 * Called by bond_set_carrier(). Return zero if carrier state does not
2573 * change, nonzero if it does.
2574 */
2575int bond_3ad_set_carrier(struct bonding *bond)
2576{
2577 struct aggregator *active;
2578 struct slave *first_slave;
2579 int ret = 1;
2580
2581 rcu_read_lock();
2582 first_slave = bond_first_slave_rcu(bond);
2583 if (!first_slave) {
2584 ret = 0;
2585 goto out;
2586 }
2587 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2588 if (active) {
2589 /* are enough slaves available to consider link up? */
2590 if (__agg_active_ports(active) < bond->params.min_links) {
2591 if (netif_carrier_ok(bond->dev)) {
2592 netif_carrier_off(bond->dev);
2593 goto out;
2594 }
2595 } else if (!netif_carrier_ok(bond->dev)) {
2596 netif_carrier_on(bond->dev);
2597 goto out;
2598 }
2599 } else if (netif_carrier_ok(bond->dev)) {
2600 netif_carrier_off(bond->dev);
2601 }
2602out:
2603 rcu_read_unlock();
2604 return ret;
2605}
2606
2607/**
2608 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2609 * @bond: bonding struct to work on
2610 * @ad_info: ad_info struct to fill with the bond's info
2611 *
2612 * Returns: 0 on success
2613 * < 0 on error
2614 */
2615int __bond_3ad_get_active_agg_info(struct bonding *bond,
2616 struct ad_info *ad_info)
2617{
2618 struct aggregator *aggregator = NULL;
2619 struct list_head *iter;
2620 struct slave *slave;
2621 struct port *port;
2622
2623 bond_for_each_slave_rcu(bond, slave, iter) {
2624 port = &(SLAVE_AD_INFO(slave)->port);
2625 if (port->aggregator && port->aggregator->is_active) {
2626 aggregator = port->aggregator;
2627 break;
2628 }
2629 }
2630
2631 if (!aggregator)
2632 return -1;
2633
2634 ad_info->aggregator_id = aggregator->aggregator_identifier;
2635 ad_info->ports = __agg_active_ports(aggregator);
2636 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2637 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2638 ether_addr_copy(ad_info->partner_system,
2639 aggregator->partner_system.mac_addr_value);
2640 return 0;
2641}
2642
2643int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2644{
2645 int ret;
2646
2647 rcu_read_lock();
2648 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2649 rcu_read_unlock();
2650
2651 return ret;
2652}
2653
2654int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2655 struct slave *slave)
2656{
2657 struct lacpdu *lacpdu, _lacpdu;
2658
2659 if (skb->protocol != PKT_TYPE_LACPDU)
2660 return RX_HANDLER_ANOTHER;
2661
2662 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2663 return RX_HANDLER_ANOTHER;
2664
2665 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2666 if (!lacpdu) {
2667 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);
2668 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);
2669 return RX_HANDLER_ANOTHER;
2670 }
2671
2672 return bond_3ad_rx_indication(lacpdu, slave);
2673}
2674
2675/**
2676 * bond_3ad_update_lacp_rate - change the lacp rate
2677 * @bond - bonding struct
2678 *
2679 * When modify lacp_rate parameter via sysfs,
2680 * update actor_oper_port_state of each port.
2681 *
2682 * Hold bond->mode_lock,
2683 * so we can modify port->actor_oper_port_state,
2684 * no matter bond is up or down.
2685 */
2686void bond_3ad_update_lacp_rate(struct bonding *bond)
2687{
2688 struct port *port = NULL;
2689 struct list_head *iter;
2690 struct slave *slave;
2691 int lacp_fast;
2692
2693 lacp_fast = bond->params.lacp_fast;
2694 spin_lock_bh(&bond->mode_lock);
2695 bond_for_each_slave(bond, slave, iter) {
2696 port = &(SLAVE_AD_INFO(slave)->port);
2697 if (lacp_fast)
2698 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2699 else
2700 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2701 }
2702 spin_unlock_bh(&bond->mode_lock);
2703}
2704
2705size_t bond_3ad_stats_size(void)
2706{
2707 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */
2708 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */
2709 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */
2710 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */
2711 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */
2712 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */
2713 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */
2714 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */
2715 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */
2716}
2717
2718int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)
2719{
2720 u64 val;
2721
2722 val = atomic64_read(&stats->lacpdu_rx);
2723 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,
2724 BOND_3AD_STAT_PAD))
2725 return -EMSGSIZE;
2726 val = atomic64_read(&stats->lacpdu_tx);
2727 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,
2728 BOND_3AD_STAT_PAD))
2729 return -EMSGSIZE;
2730 val = atomic64_read(&stats->lacpdu_unknown_rx);
2731 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,
2732 BOND_3AD_STAT_PAD))
2733 return -EMSGSIZE;
2734 val = atomic64_read(&stats->lacpdu_illegal_rx);
2735 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,
2736 BOND_3AD_STAT_PAD))
2737 return -EMSGSIZE;
2738
2739 val = atomic64_read(&stats->marker_rx);
2740 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,
2741 BOND_3AD_STAT_PAD))
2742 return -EMSGSIZE;
2743 val = atomic64_read(&stats->marker_tx);
2744 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,
2745 BOND_3AD_STAT_PAD))
2746 return -EMSGSIZE;
2747 val = atomic64_read(&stats->marker_resp_rx);
2748 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,
2749 BOND_3AD_STAT_PAD))
2750 return -EMSGSIZE;
2751 val = atomic64_read(&stats->marker_resp_tx);
2752 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,
2753 BOND_3AD_STAT_PAD))
2754 return -EMSGSIZE;
2755 val = atomic64_read(&stats->marker_unknown_rx);
2756 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,
2757 BOND_3AD_STAT_PAD))
2758 return -EMSGSIZE;
2759
2760 return 0;
2761}