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[mirror_ubuntu-focal-kernel.git] / drivers / net / bonding / bond_3ad.c
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
71 enum 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
92 static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
93 0, 0, 0, 0, 0, 0
94 };
95 static u16 ad_ticks_per_sec;
96 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
97
98 static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
99 MULTICAST_LACPDU_ADDR;
100
101 /* ================= main 802.3ad protocol functions ================== */
102 static int ad_lacpdu_send(struct port *port);
103 static int ad_marker_send(struct port *port, struct bond_marker *marker);
104 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
105 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
106 static void ad_tx_machine(struct port *port);
107 static void ad_periodic_machine(struct port *port);
108 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
109 static void ad_agg_selection_logic(struct aggregator *aggregator,
110 bool *update_slave_arr);
111 static void ad_clear_agg(struct aggregator *aggregator);
112 static void ad_initialize_agg(struct aggregator *aggregator);
113 static void ad_initialize_port(struct port *port, int lacp_fast);
114 static void ad_enable_collecting_distributing(struct port *port,
115 bool *update_slave_arr);
116 static void ad_disable_collecting_distributing(struct port *port,
117 bool *update_slave_arr);
118 static void ad_marker_info_received(struct bond_marker *marker_info,
119 struct port *port);
120 static void ad_marker_response_received(struct bond_marker *marker,
121 struct port *port);
122 static 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 */
133 static 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 */
149 static 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 */
174 static 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 */
183 static 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 */
192 static 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 */
204 static 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 */
215 static 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 */
229 static 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 atomic_read(&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 */
259 static 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 */
350 static 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
376 static 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 */
395 static 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 */
449 static 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 */
478 static 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 */
521 static 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 */
546 static 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 */
577 static 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 */
610 static 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 */
637 static 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 */
665 static 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
678 static 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 */
697 static 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 */
759 static 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 */
776 static 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 */
830 static 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 */
874 static 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 */
924 static 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 __enable_port(port);
1017 *update_slave_arr = true;
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 */
1081 static 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 */
1219 static 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 */
1257 static 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 */
1292 static 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 */
1384 static 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 */
1551 static 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
1620 static 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 */
1663 static 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 *update_slave_arr = true;
1774 }
1775 }
1776
1777 rcu_read_unlock();
1778
1779 bond_3ad_set_carrier(bond);
1780 }
1781
1782 /**
1783 * ad_clear_agg - clear a given aggregator's parameters
1784 * @aggregator: the aggregator we're looking at
1785 */
1786 static void ad_clear_agg(struct aggregator *aggregator)
1787 {
1788 if (aggregator) {
1789 aggregator->is_individual = false;
1790 aggregator->actor_admin_aggregator_key = 0;
1791 aggregator->actor_oper_aggregator_key = 0;
1792 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1793 aggregator->partner_system_priority = 0;
1794 aggregator->partner_oper_aggregator_key = 0;
1795 aggregator->receive_state = 0;
1796 aggregator->transmit_state = 0;
1797 aggregator->lag_ports = NULL;
1798 aggregator->is_active = 0;
1799 aggregator->num_of_ports = 0;
1800 pr_debug("%s: LAG %d was cleared\n",
1801 aggregator->slave ?
1802 aggregator->slave->dev->name : "NULL",
1803 aggregator->aggregator_identifier);
1804 }
1805 }
1806
1807 /**
1808 * ad_initialize_agg - initialize a given aggregator's parameters
1809 * @aggregator: the aggregator we're looking at
1810 */
1811 static void ad_initialize_agg(struct aggregator *aggregator)
1812 {
1813 if (aggregator) {
1814 ad_clear_agg(aggregator);
1815
1816 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1817 aggregator->aggregator_identifier = 0;
1818 aggregator->slave = NULL;
1819 }
1820 }
1821
1822 /**
1823 * ad_initialize_port - initialize a given port's parameters
1824 * @aggregator: the aggregator we're looking at
1825 * @lacp_fast: boolean. whether fast periodic should be used
1826 */
1827 static void ad_initialize_port(struct port *port, int lacp_fast)
1828 {
1829 static const struct port_params tmpl = {
1830 .system_priority = 0xffff,
1831 .key = 1,
1832 .port_number = 1,
1833 .port_priority = 0xff,
1834 .port_state = 1,
1835 };
1836 static const struct lacpdu lacpdu = {
1837 .subtype = 0x01,
1838 .version_number = 0x01,
1839 .tlv_type_actor_info = 0x01,
1840 .actor_information_length = 0x14,
1841 .tlv_type_partner_info = 0x02,
1842 .partner_information_length = 0x14,
1843 .tlv_type_collector_info = 0x03,
1844 .collector_information_length = 0x10,
1845 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1846 };
1847
1848 if (port) {
1849 port->actor_port_priority = 0xff;
1850 port->actor_port_aggregator_identifier = 0;
1851 port->ntt = false;
1852 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1853 AD_STATE_LACP_ACTIVITY;
1854 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1855 AD_STATE_LACP_ACTIVITY;
1856
1857 if (lacp_fast)
1858 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1859
1860 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1861 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1862
1863 port->is_enabled = true;
1864 /* private parameters */
1865 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1866 port->sm_rx_state = 0;
1867 port->sm_rx_timer_counter = 0;
1868 port->sm_periodic_state = 0;
1869 port->sm_periodic_timer_counter = 0;
1870 port->sm_mux_state = 0;
1871 port->sm_mux_timer_counter = 0;
1872 port->sm_tx_state = 0;
1873 port->aggregator = NULL;
1874 port->next_port_in_aggregator = NULL;
1875 port->transaction_id = 0;
1876
1877 port->sm_churn_actor_timer_counter = 0;
1878 port->sm_churn_actor_state = 0;
1879 port->churn_actor_count = 0;
1880 port->sm_churn_partner_timer_counter = 0;
1881 port->sm_churn_partner_state = 0;
1882 port->churn_partner_count = 0;
1883
1884 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1885 }
1886 }
1887
1888 /**
1889 * ad_enable_collecting_distributing - enable a port's transmit/receive
1890 * @port: the port we're looking at
1891 * @update_slave_arr: Does slave array need update?
1892 *
1893 * Enable @port if it's in an active aggregator
1894 */
1895 static void ad_enable_collecting_distributing(struct port *port,
1896 bool *update_slave_arr)
1897 {
1898 if (port->aggregator->is_active) {
1899 slave_dbg(port->slave->bond->dev, port->slave->dev,
1900 "Enabling port %d (LAG %d)\n",
1901 port->actor_port_number,
1902 port->aggregator->aggregator_identifier);
1903 __enable_port(port);
1904 /* Slave array needs update */
1905 *update_slave_arr = true;
1906 }
1907 }
1908
1909 /**
1910 * ad_disable_collecting_distributing - disable a port's transmit/receive
1911 * @port: the port we're looking at
1912 * @update_slave_arr: Does slave array need update?
1913 */
1914 static void ad_disable_collecting_distributing(struct port *port,
1915 bool *update_slave_arr)
1916 {
1917 if (port->aggregator &&
1918 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1919 &(null_mac_addr))) {
1920 slave_dbg(port->slave->bond->dev, port->slave->dev,
1921 "Disabling port %d (LAG %d)\n",
1922 port->actor_port_number,
1923 port->aggregator->aggregator_identifier);
1924 __disable_port(port);
1925 /* Slave array needs an update */
1926 *update_slave_arr = true;
1927 }
1928 }
1929
1930 /**
1931 * ad_marker_info_received - handle receive of a Marker information frame
1932 * @marker_info: Marker info received
1933 * @port: the port we're looking at
1934 */
1935 static void ad_marker_info_received(struct bond_marker *marker_info,
1936 struct port *port)
1937 {
1938 struct bond_marker marker;
1939
1940 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx);
1941 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx);
1942
1943 /* copy the received marker data to the response marker */
1944 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1945 /* change the marker subtype to marker response */
1946 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1947
1948 /* send the marker response */
1949 if (ad_marker_send(port, &marker) >= 0)
1950 slave_dbg(port->slave->bond->dev, port->slave->dev,
1951 "Sent Marker Response on port %d\n",
1952 port->actor_port_number);
1953 }
1954
1955 /**
1956 * ad_marker_response_received - handle receive of a marker response frame
1957 * @marker: marker PDU received
1958 * @port: the port we're looking at
1959 *
1960 * This function does nothing since we decided not to implement send and handle
1961 * response for marker PDU's, in this stage, but only to respond to marker
1962 * information.
1963 */
1964 static void ad_marker_response_received(struct bond_marker *marker,
1965 struct port *port)
1966 {
1967 atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx);
1968 atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx);
1969
1970 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1971 }
1972
1973 /* ========= AD exported functions to the main bonding code ========= */
1974
1975 /* Check aggregators status in team every T seconds */
1976 #define AD_AGGREGATOR_SELECTION_TIMER 8
1977
1978 /**
1979 * bond_3ad_initiate_agg_selection - initate aggregator selection
1980 * @bond: bonding struct
1981 *
1982 * Set the aggregation selection timer, to initiate an agg selection in
1983 * the very near future. Called during first initialization, and during
1984 * any down to up transitions of the bond.
1985 */
1986 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1987 {
1988 atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout);
1989 }
1990
1991 /**
1992 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1993 * @bond: bonding struct to work on
1994 * @tick_resolution: tick duration (millisecond resolution)
1995 *
1996 * Can be called only after the mac address of the bond is set.
1997 */
1998 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1999 {
2000 /* check that the bond is not initialized yet */
2001 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
2002 bond->dev->dev_addr)) {
2003
2004 BOND_AD_INFO(bond).aggregator_identifier = 0;
2005
2006 BOND_AD_INFO(bond).system.sys_priority =
2007 bond->params.ad_actor_sys_prio;
2008 if (is_zero_ether_addr(bond->params.ad_actor_system))
2009 BOND_AD_INFO(bond).system.sys_mac_addr =
2010 *((struct mac_addr *)bond->dev->dev_addr);
2011 else
2012 BOND_AD_INFO(bond).system.sys_mac_addr =
2013 *((struct mac_addr *)bond->params.ad_actor_system);
2014
2015 /* initialize how many times this module is called in one
2016 * second (should be about every 100ms)
2017 */
2018 ad_ticks_per_sec = tick_resolution;
2019
2020 bond_3ad_initiate_agg_selection(bond,
2021 AD_AGGREGATOR_SELECTION_TIMER *
2022 ad_ticks_per_sec);
2023 }
2024 }
2025
2026 /**
2027 * bond_3ad_bind_slave - initialize a slave's port
2028 * @slave: slave struct to work on
2029 *
2030 * Returns: 0 on success
2031 * < 0 on error
2032 */
2033 void bond_3ad_bind_slave(struct slave *slave)
2034 {
2035 struct bonding *bond = bond_get_bond_by_slave(slave);
2036 struct port *port;
2037 struct aggregator *aggregator;
2038
2039 /* check that the slave has not been initialized yet. */
2040 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
2041
2042 /* port initialization */
2043 port = &(SLAVE_AD_INFO(slave)->port);
2044
2045 ad_initialize_port(port, bond->params.lacp_fast);
2046
2047 port->slave = slave;
2048 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
2049 /* key is determined according to the link speed, duplex and
2050 * user key
2051 */
2052 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
2053 ad_update_actor_keys(port, false);
2054 /* actor system is the bond's system */
2055 __ad_actor_update_port(port);
2056 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
2057 * lacpdu's are sent in one second)
2058 */
2059 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
2060
2061 __disable_port(port);
2062
2063 /* aggregator initialization */
2064 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2065
2066 ad_initialize_agg(aggregator);
2067
2068 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
2069 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
2070 aggregator->slave = slave;
2071 aggregator->is_active = 0;
2072 aggregator->num_of_ports = 0;
2073 }
2074 }
2075
2076 /**
2077 * bond_3ad_unbind_slave - deinitialize a slave's port
2078 * @slave: slave struct to work on
2079 *
2080 * Search for the aggregator that is related to this port, remove the
2081 * aggregator and assign another aggregator for other port related to it
2082 * (if any), and remove the port.
2083 */
2084 void bond_3ad_unbind_slave(struct slave *slave)
2085 {
2086 struct port *port, *prev_port, *temp_port;
2087 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2088 int select_new_active_agg = 0;
2089 struct bonding *bond = slave->bond;
2090 struct slave *slave_iter;
2091 struct list_head *iter;
2092 bool dummy_slave_update; /* Ignore this value as caller updates array */
2093
2094 /* Sync against bond_3ad_state_machine_handler() */
2095 spin_lock_bh(&bond->mode_lock);
2096 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2097 port = &(SLAVE_AD_INFO(slave)->port);
2098
2099 /* if slave is null, the whole port is not initialized */
2100 if (!port->slave) {
2101 slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n");
2102 goto out;
2103 }
2104
2105 slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n",
2106 aggregator->aggregator_identifier);
2107
2108 /* Tell the partner that this port is not suitable for aggregation */
2109 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
2110 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
2111 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
2112 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2113 __update_lacpdu_from_port(port);
2114 ad_lacpdu_send(port);
2115
2116 /* check if this aggregator is occupied */
2117 if (aggregator->lag_ports) {
2118 /* check if there are other ports related to this aggregator
2119 * except the port related to this slave(thats ensure us that
2120 * there is a reason to search for new aggregator, and that we
2121 * will find one
2122 */
2123 if ((aggregator->lag_ports != port) ||
2124 (aggregator->lag_ports->next_port_in_aggregator)) {
2125 /* find new aggregator for the related port(s) */
2126 bond_for_each_slave(bond, slave_iter, iter) {
2127 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2128 /* if the new aggregator is empty, or it is
2129 * connected to our port only
2130 */
2131 if (!new_aggregator->lag_ports ||
2132 ((new_aggregator->lag_ports == port) &&
2133 !new_aggregator->lag_ports->next_port_in_aggregator))
2134 break;
2135 }
2136 if (!slave_iter)
2137 new_aggregator = NULL;
2138
2139 /* if new aggregator found, copy the aggregator's
2140 * parameters and connect the related lag_ports to the
2141 * new aggregator
2142 */
2143 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2144 slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2145 aggregator->aggregator_identifier,
2146 new_aggregator->aggregator_identifier);
2147
2148 if ((new_aggregator->lag_ports == port) &&
2149 new_aggregator->is_active) {
2150 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2151 select_new_active_agg = 1;
2152 }
2153
2154 new_aggregator->is_individual = aggregator->is_individual;
2155 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2156 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2157 new_aggregator->partner_system = aggregator->partner_system;
2158 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2159 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2160 new_aggregator->receive_state = aggregator->receive_state;
2161 new_aggregator->transmit_state = aggregator->transmit_state;
2162 new_aggregator->lag_ports = aggregator->lag_ports;
2163 new_aggregator->is_active = aggregator->is_active;
2164 new_aggregator->num_of_ports = aggregator->num_of_ports;
2165
2166 /* update the information that is written on
2167 * the ports about the aggregator
2168 */
2169 for (temp_port = aggregator->lag_ports; temp_port;
2170 temp_port = temp_port->next_port_in_aggregator) {
2171 temp_port->aggregator = new_aggregator;
2172 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2173 }
2174
2175 ad_clear_agg(aggregator);
2176
2177 if (select_new_active_agg)
2178 ad_agg_selection_logic(__get_first_agg(port),
2179 &dummy_slave_update);
2180 } else {
2181 slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2182 }
2183 } else {
2184 /* in case that the only port related to this
2185 * aggregator is the one we want to remove
2186 */
2187 select_new_active_agg = aggregator->is_active;
2188 ad_clear_agg(aggregator);
2189 if (select_new_active_agg) {
2190 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2191 /* select new active aggregator */
2192 temp_aggregator = __get_first_agg(port);
2193 if (temp_aggregator)
2194 ad_agg_selection_logic(temp_aggregator,
2195 &dummy_slave_update);
2196 }
2197 }
2198 }
2199
2200 slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number);
2201
2202 /* find the aggregator that this port is connected to */
2203 bond_for_each_slave(bond, slave_iter, iter) {
2204 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2205 prev_port = NULL;
2206 /* search the port in the aggregator's related ports */
2207 for (temp_port = temp_aggregator->lag_ports; temp_port;
2208 prev_port = temp_port,
2209 temp_port = temp_port->next_port_in_aggregator) {
2210 if (temp_port == port) {
2211 /* the aggregator found - detach the port from
2212 * this aggregator
2213 */
2214 if (prev_port)
2215 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2216 else
2217 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2218 temp_aggregator->num_of_ports--;
2219 if (__agg_active_ports(temp_aggregator) == 0) {
2220 select_new_active_agg = temp_aggregator->is_active;
2221 ad_clear_agg(temp_aggregator);
2222 if (select_new_active_agg) {
2223 slave_info(bond->dev, slave->dev, "Removing an active aggregator\n");
2224 /* select new active aggregator */
2225 ad_agg_selection_logic(__get_first_agg(port),
2226 &dummy_slave_update);
2227 }
2228 }
2229 break;
2230 }
2231 }
2232 }
2233 port->slave = NULL;
2234
2235 out:
2236 spin_unlock_bh(&bond->mode_lock);
2237 }
2238
2239 /**
2240 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2241 * @bond: bonding struct to work on
2242 *
2243 * If an ad_actor setting gets changed we need to update the individual port
2244 * settings so the bond device will use the new values when it gets upped.
2245 */
2246 void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2247 {
2248 struct list_head *iter;
2249 struct slave *slave;
2250
2251 ASSERT_RTNL();
2252
2253 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2254 if (is_zero_ether_addr(bond->params.ad_actor_system))
2255 BOND_AD_INFO(bond).system.sys_mac_addr =
2256 *((struct mac_addr *)bond->dev->dev_addr);
2257 else
2258 BOND_AD_INFO(bond).system.sys_mac_addr =
2259 *((struct mac_addr *)bond->params.ad_actor_system);
2260
2261 spin_lock_bh(&bond->mode_lock);
2262 bond_for_each_slave(bond, slave, iter) {
2263 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2264
2265 __ad_actor_update_port(port);
2266 port->ntt = true;
2267 }
2268 spin_unlock_bh(&bond->mode_lock);
2269 }
2270
2271 /**
2272 * bond_agg_timer_advance - advance agg_select_timer
2273 * @bond: bonding structure
2274 *
2275 * Return true when agg_select_timer reaches 0.
2276 */
2277 static bool bond_agg_timer_advance(struct bonding *bond)
2278 {
2279 int val, nval;
2280
2281 while (1) {
2282 val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer);
2283 if (!val)
2284 return false;
2285 nval = val - 1;
2286 if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer,
2287 val, nval) == val)
2288 break;
2289 }
2290 return nval == 0;
2291 }
2292
2293 /**
2294 * bond_3ad_state_machine_handler - handle state machines timeout
2295 * @bond: bonding struct to work on
2296 *
2297 * The state machine handling concept in this module is to check every tick
2298 * which state machine should operate any function. The execution order is
2299 * round robin, so when we have an interaction between state machines, the
2300 * reply of one to each other might be delayed until next tick.
2301 *
2302 * This function also complete the initialization when the agg_select_timer
2303 * times out, and it selects an aggregator for the ports that are yet not
2304 * related to any aggregator, and selects the active aggregator for a bond.
2305 */
2306 void bond_3ad_state_machine_handler(struct work_struct *work)
2307 {
2308 struct bonding *bond = container_of(work, struct bonding,
2309 ad_work.work);
2310 struct aggregator *aggregator;
2311 struct list_head *iter;
2312 struct slave *slave;
2313 struct port *port;
2314 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2315 bool update_slave_arr = false;
2316
2317 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2318 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2319 * concurrently due to incoming LACPDU as well.
2320 */
2321 spin_lock_bh(&bond->mode_lock);
2322 rcu_read_lock();
2323
2324 /* check if there are any slaves */
2325 if (!bond_has_slaves(bond))
2326 goto re_arm;
2327
2328 if (bond_agg_timer_advance(bond)) {
2329 slave = bond_first_slave_rcu(bond);
2330 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2331
2332 /* select the active aggregator for the bond */
2333 if (port) {
2334 if (!port->slave) {
2335 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2336 bond->dev->name);
2337 goto re_arm;
2338 }
2339
2340 aggregator = __get_first_agg(port);
2341 ad_agg_selection_logic(aggregator, &update_slave_arr);
2342 }
2343 bond_3ad_set_carrier(bond);
2344 }
2345
2346 /* for each port run the state machines */
2347 bond_for_each_slave_rcu(bond, slave, iter) {
2348 port = &(SLAVE_AD_INFO(slave)->port);
2349 if (!port->slave) {
2350 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2351 bond->dev->name);
2352 goto re_arm;
2353 }
2354
2355 ad_rx_machine(NULL, port);
2356 ad_periodic_machine(port);
2357 ad_port_selection_logic(port, &update_slave_arr);
2358 ad_mux_machine(port, &update_slave_arr);
2359 ad_tx_machine(port);
2360 ad_churn_machine(port);
2361
2362 /* turn off the BEGIN bit, since we already handled it */
2363 if (port->sm_vars & AD_PORT_BEGIN)
2364 port->sm_vars &= ~AD_PORT_BEGIN;
2365 }
2366
2367 re_arm:
2368 bond_for_each_slave_rcu(bond, slave, iter) {
2369 if (slave->should_notify) {
2370 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2371 break;
2372 }
2373 }
2374 rcu_read_unlock();
2375 spin_unlock_bh(&bond->mode_lock);
2376
2377 if (update_slave_arr)
2378 bond_slave_arr_work_rearm(bond, 0);
2379
2380 if (should_notify_rtnl && rtnl_trylock()) {
2381 bond_slave_state_notify(bond);
2382 rtnl_unlock();
2383 }
2384 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2385 }
2386
2387 /**
2388 * bond_3ad_rx_indication - handle a received frame
2389 * @lacpdu: received lacpdu
2390 * @slave: slave struct to work on
2391 *
2392 * It is assumed that frames that were sent on this NIC don't returned as new
2393 * received frames (loopback). Since only the payload is given to this
2394 * function, it check for loopback.
2395 */
2396 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave)
2397 {
2398 struct bonding *bond = slave->bond;
2399 int ret = RX_HANDLER_ANOTHER;
2400 struct bond_marker *marker;
2401 struct port *port;
2402 atomic64_t *stat;
2403
2404 port = &(SLAVE_AD_INFO(slave)->port);
2405 if (!port->slave) {
2406 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2407 slave->dev->name, slave->bond->dev->name);
2408 return ret;
2409 }
2410
2411 switch (lacpdu->subtype) {
2412 case AD_TYPE_LACPDU:
2413 ret = RX_HANDLER_CONSUMED;
2414 slave_dbg(slave->bond->dev, slave->dev,
2415 "Received LACPDU on port %d\n",
2416 port->actor_port_number);
2417 /* Protect against concurrent state machines */
2418 spin_lock(&slave->bond->mode_lock);
2419 ad_rx_machine(lacpdu, port);
2420 spin_unlock(&slave->bond->mode_lock);
2421 break;
2422 case AD_TYPE_MARKER:
2423 ret = RX_HANDLER_CONSUMED;
2424 /* No need to convert fields to Little Endian since we
2425 * don't use the marker's fields.
2426 */
2427 marker = (struct bond_marker *)lacpdu;
2428 switch (marker->tlv_type) {
2429 case AD_MARKER_INFORMATION_SUBTYPE:
2430 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n",
2431 port->actor_port_number);
2432 ad_marker_info_received(marker, port);
2433 break;
2434 case AD_MARKER_RESPONSE_SUBTYPE:
2435 slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n",
2436 port->actor_port_number);
2437 ad_marker_response_received(marker, port);
2438 break;
2439 default:
2440 slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n",
2441 port->actor_port_number);
2442 stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx;
2443 atomic64_inc(stat);
2444 stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx;
2445 atomic64_inc(stat);
2446 }
2447 break;
2448 default:
2449 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx);
2450 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx);
2451 }
2452
2453 return ret;
2454 }
2455
2456 /**
2457 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2458 * its current speed and duplex settings.
2459 *
2460 * @port: the port we'are looking at
2461 * @reset: Boolean to just reset the speed and the duplex part of the key
2462 *
2463 * The logic to change the oper / admin keys is:
2464 * (a) A full duplex port can participate in LACP with partner.
2465 * (b) When the speed is changed, LACP need to be reinitiated.
2466 */
2467 static void ad_update_actor_keys(struct port *port, bool reset)
2468 {
2469 u8 duplex = 0;
2470 u16 ospeed = 0, speed = 0;
2471 u16 old_oper_key = port->actor_oper_port_key;
2472
2473 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2474 if (!reset) {
2475 speed = __get_link_speed(port);
2476 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2477 duplex = __get_duplex(port);
2478 port->actor_admin_port_key |= (speed << 1) | duplex;
2479 }
2480 port->actor_oper_port_key = port->actor_admin_port_key;
2481
2482 if (old_oper_key != port->actor_oper_port_key) {
2483 /* Only 'duplex' port participates in LACP */
2484 if (duplex)
2485 port->sm_vars |= AD_PORT_LACP_ENABLED;
2486 else
2487 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2488
2489 if (!reset) {
2490 if (!speed) {
2491 slave_err(port->slave->bond->dev,
2492 port->slave->dev,
2493 "speed changed to 0 on port %d\n",
2494 port->actor_port_number);
2495 } else if (duplex && ospeed != speed) {
2496 /* Speed change restarts LACP state-machine */
2497 port->sm_vars |= AD_PORT_BEGIN;
2498 }
2499 }
2500 }
2501 }
2502
2503 /**
2504 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2505 * change indication
2506 *
2507 * @slave: slave struct to work on
2508 *
2509 * Handle reselection of aggregator (if needed) for this port.
2510 */
2511 void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
2512 {
2513 struct port *port;
2514
2515 port = &(SLAVE_AD_INFO(slave)->port);
2516
2517 /* if slave is null, the whole port is not initialized */
2518 if (!port->slave) {
2519 slave_warn(slave->bond->dev, slave->dev,
2520 "speed/duplex changed for uninitialized port\n");
2521 return;
2522 }
2523
2524 spin_lock_bh(&slave->bond->mode_lock);
2525 ad_update_actor_keys(port, false);
2526 spin_unlock_bh(&slave->bond->mode_lock);
2527 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n",
2528 port->actor_port_number);
2529 }
2530
2531 /**
2532 * bond_3ad_handle_link_change - handle a slave's link status change indication
2533 * @slave: slave struct to work on
2534 * @status: whether the link is now up or down
2535 *
2536 * Handle reselection of aggregator (if needed) for this port.
2537 */
2538 void bond_3ad_handle_link_change(struct slave *slave, char link)
2539 {
2540 struct aggregator *agg;
2541 struct port *port;
2542 bool dummy;
2543
2544 port = &(SLAVE_AD_INFO(slave)->port);
2545
2546 /* if slave is null, the whole port is not initialized */
2547 if (!port->slave) {
2548 slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n");
2549 return;
2550 }
2551
2552 spin_lock_bh(&slave->bond->mode_lock);
2553 /* on link down we are zeroing duplex and speed since
2554 * some of the adaptors(ce1000.lan) report full duplex/speed
2555 * instead of N/A(duplex) / 0(speed).
2556 *
2557 * on link up we are forcing recheck on the duplex and speed since
2558 * some of he adaptors(ce1000.lan) report.
2559 */
2560 if (link == BOND_LINK_UP) {
2561 port->is_enabled = true;
2562 ad_update_actor_keys(port, false);
2563 } else {
2564 /* link has failed */
2565 port->is_enabled = false;
2566 ad_update_actor_keys(port, true);
2567 }
2568 agg = __get_first_agg(port);
2569 ad_agg_selection_logic(agg, &dummy);
2570
2571 spin_unlock_bh(&slave->bond->mode_lock);
2572
2573 slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n",
2574 port->actor_port_number,
2575 link == BOND_LINK_UP ? "UP" : "DOWN");
2576
2577 /* RTNL is held and mode_lock is released so it's safe
2578 * to update slave_array here.
2579 */
2580 bond_update_slave_arr(slave->bond, NULL);
2581 }
2582
2583 /**
2584 * bond_3ad_set_carrier - set link state for bonding master
2585 * @bond - bonding structure
2586 *
2587 * if we have an active aggregator, we're up, if not, we're down.
2588 * Presumes that we cannot have an active aggregator if there are
2589 * no slaves with link up.
2590 *
2591 * This behavior complies with IEEE 802.3 section 43.3.9.
2592 *
2593 * Called by bond_set_carrier(). Return zero if carrier state does not
2594 * change, nonzero if it does.
2595 */
2596 int bond_3ad_set_carrier(struct bonding *bond)
2597 {
2598 struct aggregator *active;
2599 struct slave *first_slave;
2600 int ret = 1;
2601
2602 rcu_read_lock();
2603 first_slave = bond_first_slave_rcu(bond);
2604 if (!first_slave) {
2605 ret = 0;
2606 goto out;
2607 }
2608 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2609 if (active) {
2610 /* are enough slaves available to consider link up? */
2611 if (__agg_active_ports(active) < bond->params.min_links) {
2612 if (netif_carrier_ok(bond->dev)) {
2613 netif_carrier_off(bond->dev);
2614 goto out;
2615 }
2616 } else if (!netif_carrier_ok(bond->dev)) {
2617 netif_carrier_on(bond->dev);
2618 goto out;
2619 }
2620 } else if (netif_carrier_ok(bond->dev)) {
2621 netif_carrier_off(bond->dev);
2622 }
2623 out:
2624 rcu_read_unlock();
2625 return ret;
2626 }
2627
2628 /**
2629 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2630 * @bond: bonding struct to work on
2631 * @ad_info: ad_info struct to fill with the bond's info
2632 *
2633 * Returns: 0 on success
2634 * < 0 on error
2635 */
2636 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2637 struct ad_info *ad_info)
2638 {
2639 struct aggregator *aggregator = NULL;
2640 struct list_head *iter;
2641 struct slave *slave;
2642 struct port *port;
2643
2644 bond_for_each_slave_rcu(bond, slave, iter) {
2645 port = &(SLAVE_AD_INFO(slave)->port);
2646 if (port->aggregator && port->aggregator->is_active) {
2647 aggregator = port->aggregator;
2648 break;
2649 }
2650 }
2651
2652 if (!aggregator)
2653 return -1;
2654
2655 ad_info->aggregator_id = aggregator->aggregator_identifier;
2656 ad_info->ports = __agg_active_ports(aggregator);
2657 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2658 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2659 ether_addr_copy(ad_info->partner_system,
2660 aggregator->partner_system.mac_addr_value);
2661 return 0;
2662 }
2663
2664 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2665 {
2666 int ret;
2667
2668 rcu_read_lock();
2669 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2670 rcu_read_unlock();
2671
2672 return ret;
2673 }
2674
2675 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2676 struct slave *slave)
2677 {
2678 struct lacpdu *lacpdu, _lacpdu;
2679
2680 if (skb->protocol != PKT_TYPE_LACPDU)
2681 return RX_HANDLER_ANOTHER;
2682
2683 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2684 return RX_HANDLER_ANOTHER;
2685
2686 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2687 if (!lacpdu) {
2688 atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx);
2689 atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx);
2690 return RX_HANDLER_ANOTHER;
2691 }
2692
2693 return bond_3ad_rx_indication(lacpdu, slave);
2694 }
2695
2696 /**
2697 * bond_3ad_update_lacp_rate - change the lacp rate
2698 * @bond - bonding struct
2699 *
2700 * When modify lacp_rate parameter via sysfs,
2701 * update actor_oper_port_state of each port.
2702 *
2703 * Hold bond->mode_lock,
2704 * so we can modify port->actor_oper_port_state,
2705 * no matter bond is up or down.
2706 */
2707 void bond_3ad_update_lacp_rate(struct bonding *bond)
2708 {
2709 struct port *port = NULL;
2710 struct list_head *iter;
2711 struct slave *slave;
2712 int lacp_fast;
2713
2714 lacp_fast = bond->params.lacp_fast;
2715 spin_lock_bh(&bond->mode_lock);
2716 bond_for_each_slave(bond, slave, iter) {
2717 port = &(SLAVE_AD_INFO(slave)->port);
2718 if (lacp_fast)
2719 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2720 else
2721 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2722 }
2723 spin_unlock_bh(&bond->mode_lock);
2724 }
2725
2726 size_t bond_3ad_stats_size(void)
2727 {
2728 return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */
2729 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */
2730 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */
2731 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */
2732 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */
2733 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */
2734 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */
2735 nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */
2736 nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */
2737 }
2738
2739 int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats)
2740 {
2741 u64 val;
2742
2743 val = atomic64_read(&stats->lacpdu_rx);
2744 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val,
2745 BOND_3AD_STAT_PAD))
2746 return -EMSGSIZE;
2747 val = atomic64_read(&stats->lacpdu_tx);
2748 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val,
2749 BOND_3AD_STAT_PAD))
2750 return -EMSGSIZE;
2751 val = atomic64_read(&stats->lacpdu_unknown_rx);
2752 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val,
2753 BOND_3AD_STAT_PAD))
2754 return -EMSGSIZE;
2755 val = atomic64_read(&stats->lacpdu_illegal_rx);
2756 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val,
2757 BOND_3AD_STAT_PAD))
2758 return -EMSGSIZE;
2759
2760 val = atomic64_read(&stats->marker_rx);
2761 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val,
2762 BOND_3AD_STAT_PAD))
2763 return -EMSGSIZE;
2764 val = atomic64_read(&stats->marker_tx);
2765 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val,
2766 BOND_3AD_STAT_PAD))
2767 return -EMSGSIZE;
2768 val = atomic64_read(&stats->marker_resp_rx);
2769 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val,
2770 BOND_3AD_STAT_PAD))
2771 return -EMSGSIZE;
2772 val = atomic64_read(&stats->marker_resp_tx);
2773 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val,
2774 BOND_3AD_STAT_PAD))
2775 return -EMSGSIZE;
2776 val = atomic64_read(&stats->marker_unknown_rx);
2777 if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val,
2778 BOND_3AD_STAT_PAD))
2779 return -EMSGSIZE;
2780
2781 return 0;
2782 }
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