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Bluetooth: hci_uart: Use generic functionality from Broadcom module
[linux/fpc-iii.git] / drivers / net / bonding / bond_3ad.c
blob374696de796cd707c99cf150ec12349335d5f958
1 /*
2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
7 * any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
21 */
22
23 #include <linux/skbuff.h>
24 #include <linux/if_ether.h>
25 #include <linux/netdevice.h>
26 #include <linux/spinlock.h>
27 #include <linux/ethtool.h>
28 #include <linux/etherdevice.h>
29 #include <linux/if_bonding.h>
30 #include <linux/pkt_sched.h>
31 #include <net/net_namespace.h>
32 #include <net/bonding.h>
33 #include <net/bond_3ad.h>
34
35 /* General definitions */
36 #define AD_SHORT_TIMEOUT 1
37 #define AD_LONG_TIMEOUT 0
38 #define AD_STANDBY 0x2
39 #define AD_MAX_TX_IN_SECOND 3
40 #define AD_COLLECTOR_MAX_DELAY 0
41
42 /* Timer definitions (43.4.4 in the 802.3ad standard) */
43 #define AD_FAST_PERIODIC_TIME 1
44 #define AD_SLOW_PERIODIC_TIME 30
45 #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
46 #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
47 #define AD_CHURN_DETECTION_TIME 60
48 #define AD_AGGREGATE_WAIT_TIME 2
49
50 /* Port state definitions (43.4.2.2 in the 802.3ad standard) */
51 #define AD_STATE_LACP_ACTIVITY 0x1
52 #define AD_STATE_LACP_TIMEOUT 0x2
53 #define AD_STATE_AGGREGATION 0x4
54 #define AD_STATE_SYNCHRONIZATION 0x8
55 #define AD_STATE_COLLECTING 0x10
56 #define AD_STATE_DISTRIBUTING 0x20
57 #define AD_STATE_DEFAULTED 0x40
58 #define AD_STATE_EXPIRED 0x80
59
60 /* Port Variables definitions used by the State Machines (43.4.7 in the
61 * 802.3ad standard)
62 */
63 #define AD_PORT_BEGIN 0x1
64 #define AD_PORT_LACP_ENABLED 0x2
65 #define AD_PORT_ACTOR_CHURN 0x4
66 #define AD_PORT_PARTNER_CHURN 0x8
67 #define AD_PORT_READY 0x10
68 #define AD_PORT_READY_N 0x20
69 #define AD_PORT_MATCHED 0x40
70 #define AD_PORT_STANDBY 0x80
71 #define AD_PORT_SELECTED 0x100
72 #define AD_PORT_MOVED 0x200
73 #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
74
75 /* Port Key definitions
76 * key is determined according to the link speed, duplex and
77 * user key (which is yet not supported)
78 * --------------------------------------------------------------
79 * Port key : | User key | Speed | Duplex |
80 * --------------------------------------------------------------
81 * 16 6 1 0
82 */
83 #define AD_DUPLEX_KEY_MASKS 0x1
84 #define AD_SPEED_KEY_MASKS 0x3E
85 #define AD_USER_KEY_MASKS 0xFFC0
86
87 enum ad_link_speed_type {
88 AD_LINK_SPEED_1MBPS = 1,
89 AD_LINK_SPEED_10MBPS,
90 AD_LINK_SPEED_100MBPS,
91 AD_LINK_SPEED_1000MBPS,
92 AD_LINK_SPEED_2500MBPS,
93 AD_LINK_SPEED_10000MBPS,
94 AD_LINK_SPEED_20000MBPS,
95 AD_LINK_SPEED_40000MBPS,
96 AD_LINK_SPEED_56000MBPS
97 };
98
99 /* compare MAC addresses */
100 #define MAC_ADDRESS_EQUAL(A, B) \
101 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
102
103 static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
104 static u16 ad_ticks_per_sec;
105 static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
106
107 static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
108
109 /* ================= main 802.3ad protocol functions ================== */
110 static int ad_lacpdu_send(struct port *port);
111 static int ad_marker_send(struct port *port, struct bond_marker *marker);
112 static void ad_mux_machine(struct port *port, bool *update_slave_arr);
113 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
114 static void ad_tx_machine(struct port *port);
115 static void ad_periodic_machine(struct port *port);
116 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
117 static void ad_agg_selection_logic(struct aggregator *aggregator,
118 bool *update_slave_arr);
119 static void ad_clear_agg(struct aggregator *aggregator);
120 static void ad_initialize_agg(struct aggregator *aggregator);
121 static void ad_initialize_port(struct port *port, int lacp_fast);
122 static void ad_enable_collecting_distributing(struct port *port,
123 bool *update_slave_arr);
124 static void ad_disable_collecting_distributing(struct port *port,
125 bool *update_slave_arr);
126 static void ad_marker_info_received(struct bond_marker *marker_info,
127 struct port *port);
128 static void ad_marker_response_received(struct bond_marker *marker,
129 struct port *port);
130
131
132 /* ================= api to bonding and kernel code ================== */
133
134 /**
135 * __get_bond_by_port - get the port's bonding struct
136 * @port: the port we're looking at
137 *
138 * Return @port's bonding struct, or %NULL if it can't be found.
139 */
140 static inline struct bonding *__get_bond_by_port(struct port *port)
141 {
142 if (port->slave == NULL)
143 return NULL;
144
145 return bond_get_bond_by_slave(port->slave);
146 }
147
148 /**
149 * __get_first_agg - get the first aggregator in the bond
150 * @bond: the bond we're looking at
151 *
152 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
153 * found.
154 * The caller must hold RCU or RTNL lock.
155 */
156 static inline struct aggregator *__get_first_agg(struct port *port)
157 {
158 struct bonding *bond = __get_bond_by_port(port);
159 struct slave *first_slave;
160 struct aggregator *agg;
161
162 /* If there's no bond for this port, or bond has no slaves */
163 if (bond == NULL)
164 return NULL;
165
166 rcu_read_lock();
167 first_slave = bond_first_slave_rcu(bond);
168 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
169 rcu_read_unlock();
170
171 return agg;
172 }
173
174 /**
175 * __agg_has_partner - see if we have a partner
176 * @agg: the agregator we're looking at
177 *
178 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
179 * address for the partner). Return 0 if not.
180 */
181 static inline int __agg_has_partner(struct aggregator *agg)
182 {
183 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
184 }
185
186 /**
187 * __disable_port - disable the port's slave
188 * @port: the port we're looking at
189 */
190 static inline void __disable_port(struct port *port)
191 {
192 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
193 }
194
195 /**
196 * __enable_port - enable the port's slave, if it's up
197 * @port: the port we're looking at
198 */
199 static inline void __enable_port(struct port *port)
200 {
201 struct slave *slave = port->slave;
202
203 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
204 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
205 }
206
207 /**
208 * __port_is_enabled - check if the port's slave is in active state
209 * @port: the port we're looking at
210 */
211 static inline int __port_is_enabled(struct port *port)
212 {
213 return bond_is_active_slave(port->slave);
214 }
215
216 /**
217 * __get_agg_selection_mode - get the aggregator selection mode
218 * @port: the port we're looking at
219 *
220 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
221 */
222 static inline u32 __get_agg_selection_mode(struct port *port)
223 {
224 struct bonding *bond = __get_bond_by_port(port);
225
226 if (bond == NULL)
227 return BOND_AD_STABLE;
228
229 return bond->params.ad_select;
230 }
231
232 /**
233 * __check_agg_selection_timer - check if the selection timer has expired
234 * @port: the port we're looking at
235 */
236 static inline int __check_agg_selection_timer(struct port *port)
237 {
238 struct bonding *bond = __get_bond_by_port(port);
239
240 if (bond == NULL)
241 return 0;
242
243 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
244 }
245
246 /**
247 * __get_link_speed - get a port's speed
248 * @port: the port we're looking at
249 *
250 * Return @port's speed in 802.3ad enum format. i.e. one of:
251 * 0,
252 * %AD_LINK_SPEED_10MBPS,
253 * %AD_LINK_SPEED_100MBPS,
254 * %AD_LINK_SPEED_1000MBPS,
255 * %AD_LINK_SPEED_2500MBPS,
256 * %AD_LINK_SPEED_10000MBPS
257 * %AD_LINK_SPEED_20000MBPS
258 * %AD_LINK_SPEED_40000MBPS
259 * %AD_LINK_SPEED_56000MBPS
260 */
261 static u16 __get_link_speed(struct port *port)
262 {
263 struct slave *slave = port->slave;
264 u16 speed;
265
266 /* this if covers only a special case: when the configuration starts
267 * with link down, it sets the speed to 0.
268 * This is done in spite of the fact that the e100 driver reports 0
269 * to be compatible with MVT in the future.
270 */
271 if (slave->link != BOND_LINK_UP)
272 speed = 0;
273 else {
274 switch (slave->speed) {
275 case SPEED_10:
276 speed = AD_LINK_SPEED_10MBPS;
277 break;
278
279 case SPEED_100:
280 speed = AD_LINK_SPEED_100MBPS;
281 break;
282
283 case SPEED_1000:
284 speed = AD_LINK_SPEED_1000MBPS;
285 break;
286
287 case SPEED_2500:
288 speed = AD_LINK_SPEED_2500MBPS;
289 break;
290
291 case SPEED_10000:
292 speed = AD_LINK_SPEED_10000MBPS;
293 break;
294
295 case SPEED_20000:
296 speed = AD_LINK_SPEED_20000MBPS;
297 break;
298
299 case SPEED_40000:
300 speed = AD_LINK_SPEED_40000MBPS;
301 break;
302
303 case SPEED_56000:
304 speed = AD_LINK_SPEED_56000MBPS;
305 break;
306
307 default:
308 /* unknown speed value from ethtool. shouldn't happen */
309 speed = 0;
310 break;
311 }
312 }
313
314 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
315 port->actor_port_number, speed);
316 return speed;
317 }
318
319 /**
320 * __get_duplex - get a port's duplex
321 * @port: the port we're looking at
322 *
323 * Return @port's duplex in 802.3ad bitmask format. i.e.:
324 * 0x01 if in full duplex
325 * 0x00 otherwise
326 */
327 static u8 __get_duplex(struct port *port)
328 {
329 struct slave *slave = port->slave;
330 u8 retval;
331
332 /* handling a special case: when the configuration starts with
333 * link down, it sets the duplex to 0.
334 */
335 if (slave->link != BOND_LINK_UP) {
336 retval = 0x0;
337 } else {
338 switch (slave->duplex) {
339 case DUPLEX_FULL:
340 retval = 0x1;
341 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
342 port->actor_port_number);
343 break;
344 case DUPLEX_HALF:
345 default:
346 retval = 0x0;
347 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
348 port->actor_port_number);
349 break;
350 }
351 }
352 return retval;
353 }
354
355 /* Conversions */
356
357 /**
358 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
359 * @timer_type: which timer to operate
360 * @par: timer parameter. see below
361 *
362 * If @timer_type is %current_while_timer, @par indicates long/short timer.
363 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
364 * %SLOW_PERIODIC_TIME.
365 */
366 static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
367 {
368 u16 retval = 0; /* to silence the compiler */
369
370 switch (timer_type) {
371 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
372 if (par)
373 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
374 else
375 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
376 break;
377 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
378 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
379 break;
380 case AD_PERIODIC_TIMER: /* for periodic machine */
381 retval = (par*ad_ticks_per_sec); /* long timeout */
382 break;
383 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
384 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
385 break;
386 case AD_WAIT_WHILE_TIMER: /* for selection machine */
387 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
388 break;
389 }
390
391 return retval;
392 }
393
394
395 /* ================= ad_rx_machine helper functions ================== */
396
397 /**
398 * __choose_matched - update a port's matched variable from a received lacpdu
399 * @lacpdu: the lacpdu we've received
400 * @port: the port we're looking at
401 *
402 * Update the value of the matched variable, using parameter values from a
403 * newly received lacpdu. Parameter values for the partner carried in the
404 * received PDU are compared with the corresponding operational parameter
405 * values for the actor. Matched is set to TRUE if all of these parameters
406 * match and the PDU parameter partner_state.aggregation has the same value as
407 * actor_oper_port_state.aggregation and lacp will actively maintain the link
408 * in the aggregation. Matched is also set to TRUE if the value of
409 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
410 * an individual link and lacp will actively maintain the link. Otherwise,
411 * matched is set to FALSE. LACP is considered to be actively maintaining the
412 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
413 * the actor's actor_oper_port_state.lacp_activity and the PDU's
414 * partner_state.lacp_activity variables are TRUE.
415 *
416 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
417 * used here to implement the language from 802.3ad 43.4.9 that requires
418 * recordPDU to "match" the LACPDU parameters to the stored values.
419 */
420 static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
421 {
422 /* check if all parameters are alike
423 * or this is individual link(aggregation == FALSE)
424 * then update the state machine Matched variable.
425 */
426 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
427 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
428 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
429 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
430 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
431 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
432 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
433 ) {
434 port->sm_vars |= AD_PORT_MATCHED;
435 } else {
436 port->sm_vars &= ~AD_PORT_MATCHED;
437 }
438 }
439
440 /**
441 * __record_pdu - record parameters from a received lacpdu
442 * @lacpdu: the lacpdu we've received
443 * @port: the port we're looking at
444 *
445 * Record the parameter values for the Actor carried in a received lacpdu as
446 * the current partner operational parameter values and sets
447 * actor_oper_port_state.defaulted to FALSE.
448 */
449 static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
450 {
451 if (lacpdu && port) {
452 struct port_params *partner = &port->partner_oper;
453
454 __choose_matched(lacpdu, port);
455 /* record the new parameter values for the partner
456 * operational
457 */
458 partner->port_number = ntohs(lacpdu->actor_port);
459 partner->port_priority = ntohs(lacpdu->actor_port_priority);
460 partner->system = lacpdu->actor_system;
461 partner->system_priority = ntohs(lacpdu->actor_system_priority);
462 partner->key = ntohs(lacpdu->actor_key);
463 partner->port_state = lacpdu->actor_state;
464
465 /* set actor_oper_port_state.defaulted to FALSE */
466 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
467
468 /* set the partner sync. to on if the partner is sync,
469 * and the port is matched
470 */
471 if ((port->sm_vars & AD_PORT_MATCHED) &&
472 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
473 partner->port_state |= AD_STATE_SYNCHRONIZATION;
474 pr_debug("%s partner sync=1\n", port->slave->dev->name);
475 } else {
476 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
477 pr_debug("%s partner sync=0\n", port->slave->dev->name);
478 }
479 }
480 }
481
482 /**
483 * __record_default - record default parameters
484 * @port: the port we're looking at
485 *
486 * This function records the default parameter values for the partner carried
487 * in the Partner Admin parameters as the current partner operational parameter
488 * values and sets actor_oper_port_state.defaulted to TRUE.
489 */
490 static void __record_default(struct port *port)
491 {
492 if (port) {
493 /* record the partner admin parameters */
494 memcpy(&port->partner_oper, &port->partner_admin,
495 sizeof(struct port_params));
496
497 /* set actor_oper_port_state.defaulted to true */
498 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
499 }
500 }
501
502 /**
503 * __update_selected - update a port's Selected variable from a received lacpdu
504 * @lacpdu: the lacpdu we've received
505 * @port: the port we're looking at
506 *
507 * Update the value of the selected variable, using parameter values from a
508 * newly received lacpdu. The parameter values for the Actor carried in the
509 * received PDU are compared with the corresponding operational parameter
510 * values for the ports partner. If one or more of the comparisons shows that
511 * the value(s) received in the PDU differ from the current operational values,
512 * then selected is set to FALSE and actor_oper_port_state.synchronization is
513 * set to out_of_sync. Otherwise, selected remains unchanged.
514 */
515 static void __update_selected(struct lacpdu *lacpdu, struct port *port)
516 {
517 if (lacpdu && port) {
518 const struct port_params *partner = &port->partner_oper;
519
520 /* check if any parameter is different then
521 * update the state machine selected variable.
522 */
523 if (ntohs(lacpdu->actor_port) != partner->port_number ||
524 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
525 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
526 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
527 ntohs(lacpdu->actor_key) != partner->key ||
528 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
529 port->sm_vars &= ~AD_PORT_SELECTED;
530 }
531 }
532 }
533
534 /**
535 * __update_default_selected - update a port's Selected variable from Partner
536 * @port: the port we're looking at
537 *
538 * This function updates the value of the selected variable, using the partner
539 * administrative parameter values. The administrative values are compared with
540 * the corresponding operational parameter values for the partner. If one or
541 * more of the comparisons shows that the administrative value(s) differ from
542 * the current operational values, then Selected is set to FALSE and
543 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
544 * Selected remains unchanged.
545 */
546 static void __update_default_selected(struct port *port)
547 {
548 if (port) {
549 const struct port_params *admin = &port->partner_admin;
550 const struct port_params *oper = &port->partner_oper;
551
552 /* check if any parameter is different then
553 * update the state machine selected variable.
554 */
555 if (admin->port_number != oper->port_number ||
556 admin->port_priority != oper->port_priority ||
557 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
558 admin->system_priority != oper->system_priority ||
559 admin->key != oper->key ||
560 (admin->port_state & AD_STATE_AGGREGATION)
561 != (oper->port_state & AD_STATE_AGGREGATION)) {
562 port->sm_vars &= ~AD_PORT_SELECTED;
563 }
564 }
565 }
566
567 /**
568 * __update_ntt - update a port's ntt variable from a received lacpdu
569 * @lacpdu: the lacpdu we've received
570 * @port: the port we're looking at
571 *
572 * Updates the value of the ntt variable, using parameter values from a newly
573 * received lacpdu. The parameter values for the partner carried in the
574 * received PDU are compared with the corresponding operational parameter
575 * values for the Actor. If one or more of the comparisons shows that the
576 * value(s) received in the PDU differ from the current operational values,
577 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
578 */
579 static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
580 {
581 /* validate lacpdu and port */
582 if (lacpdu && port) {
583 /* check if any parameter is different then
584 * update the port->ntt.
585 */
586 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
587 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
588 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
589 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
590 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
591 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
592 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
593 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
594 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
595 ) {
596 port->ntt = true;
597 }
598 }
599 }
600
601 /**
602 * __agg_ports_are_ready - check if all ports in an aggregator are ready
603 * @aggregator: the aggregator we're looking at
604 *
605 */
606 static int __agg_ports_are_ready(struct aggregator *aggregator)
607 {
608 struct port *port;
609 int retval = 1;
610
611 if (aggregator) {
612 /* scan all ports in this aggregator to verfy if they are
613 * all ready.
614 */
615 for (port = aggregator->lag_ports;
616 port;
617 port = port->next_port_in_aggregator) {
618 if (!(port->sm_vars & AD_PORT_READY_N)) {
619 retval = 0;
620 break;
621 }
622 }
623 }
624
625 return retval;
626 }
627
628 /**
629 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
630 * @aggregator: the aggregator we're looking at
631 * @val: Should the ports' ready bit be set on or off
632 *
633 */
634 static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
635 {
636 struct port *port;
637
638 for (port = aggregator->lag_ports; port;
639 port = port->next_port_in_aggregator) {
640 if (val)
641 port->sm_vars |= AD_PORT_READY;
642 else
643 port->sm_vars &= ~AD_PORT_READY;
644 }
645 }
646
647 /**
648 * __get_agg_bandwidth - get the total bandwidth of an aggregator
649 * @aggregator: the aggregator we're looking at
650 *
651 */
652 static u32 __get_agg_bandwidth(struct aggregator *aggregator)
653 {
654 u32 bandwidth = 0;
655
656 if (aggregator->num_of_ports) {
657 switch (__get_link_speed(aggregator->lag_ports)) {
658 case AD_LINK_SPEED_1MBPS:
659 bandwidth = aggregator->num_of_ports;
660 break;
661 case AD_LINK_SPEED_10MBPS:
662 bandwidth = aggregator->num_of_ports * 10;
663 break;
664 case AD_LINK_SPEED_100MBPS:
665 bandwidth = aggregator->num_of_ports * 100;
666 break;
667 case AD_LINK_SPEED_1000MBPS:
668 bandwidth = aggregator->num_of_ports * 1000;
669 break;
670 case AD_LINK_SPEED_2500MBPS:
671 bandwidth = aggregator->num_of_ports * 2500;
672 break;
673 case AD_LINK_SPEED_10000MBPS:
674 bandwidth = aggregator->num_of_ports * 10000;
675 break;
676 case AD_LINK_SPEED_20000MBPS:
677 bandwidth = aggregator->num_of_ports * 20000;
678 break;
679 case AD_LINK_SPEED_40000MBPS:
680 bandwidth = aggregator->num_of_ports * 40000;
681 break;
682 case AD_LINK_SPEED_56000MBPS:
683 bandwidth = aggregator->num_of_ports * 56000;
684 break;
685 default:
686 bandwidth = 0; /* to silence the compiler */
687 }
688 }
689 return bandwidth;
690 }
691
692 /**
693 * __get_active_agg - get the current active aggregator
694 * @aggregator: the aggregator we're looking at
695 *
696 * Caller must hold RCU lock.
697 */
698 static struct aggregator *__get_active_agg(struct aggregator *aggregator)
699 {
700 struct bonding *bond = aggregator->slave->bond;
701 struct list_head *iter;
702 struct slave *slave;
703
704 bond_for_each_slave_rcu(bond, slave, iter)
705 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
706 return &(SLAVE_AD_INFO(slave)->aggregator);
707
708 return NULL;
709 }
710
711 /**
712 * __update_lacpdu_from_port - update a port's lacpdu fields
713 * @port: the port we're looking at
714 */
715 static inline void __update_lacpdu_from_port(struct port *port)
716 {
717 struct lacpdu *lacpdu = &port->lacpdu;
718 const struct port_params *partner = &port->partner_oper;
719
720 /* update current actual Actor parameters
721 * lacpdu->subtype initialized
722 * lacpdu->version_number initialized
723 * lacpdu->tlv_type_actor_info initialized
724 * lacpdu->actor_information_length initialized
725 */
726
727 lacpdu->actor_system_priority = htons(port->actor_system_priority);
728 lacpdu->actor_system = port->actor_system;
729 lacpdu->actor_key = htons(port->actor_oper_port_key);
730 lacpdu->actor_port_priority = htons(port->actor_port_priority);
731 lacpdu->actor_port = htons(port->actor_port_number);
732 lacpdu->actor_state = port->actor_oper_port_state;
733 pr_debug("update lacpdu: %s, actor port state %x\n",
734 port->slave->dev->name, port->actor_oper_port_state);
735
736 /* lacpdu->reserved_3_1 initialized
737 * lacpdu->tlv_type_partner_info initialized
738 * lacpdu->partner_information_length initialized
739 */
740
741 lacpdu->partner_system_priority = htons(partner->system_priority);
742 lacpdu->partner_system = partner->system;
743 lacpdu->partner_key = htons(partner->key);
744 lacpdu->partner_port_priority = htons(partner->port_priority);
745 lacpdu->partner_port = htons(partner->port_number);
746 lacpdu->partner_state = partner->port_state;
747
748 /* lacpdu->reserved_3_2 initialized
749 * lacpdu->tlv_type_collector_info initialized
750 * lacpdu->collector_information_length initialized
751 * collector_max_delay initialized
752 * reserved_12[12] initialized
753 * tlv_type_terminator initialized
754 * terminator_length initialized
755 * reserved_50[50] initialized
756 */
757 }
758
759 /* ================= main 802.3ad protocol code ========================= */
760
761 /**
762 * ad_lacpdu_send - send out a lacpdu packet on a given port
763 * @port: the port we're looking at
764 *
765 * Returns: 0 on success
766 * < 0 on error
767 */
768 static int ad_lacpdu_send(struct port *port)
769 {
770 struct slave *slave = port->slave;
771 struct sk_buff *skb;
772 struct lacpdu_header *lacpdu_header;
773 int length = sizeof(struct lacpdu_header);
774
775 skb = dev_alloc_skb(length);
776 if (!skb)
777 return -ENOMEM;
778
779 skb->dev = slave->dev;
780 skb_reset_mac_header(skb);
781 skb->network_header = skb->mac_header + ETH_HLEN;
782 skb->protocol = PKT_TYPE_LACPDU;
783 skb->priority = TC_PRIO_CONTROL;
784
785 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
786
787 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
788 /* Note: source address is set to be the member's PERMANENT address,
789 * because we use it to identify loopback lacpdus in receive.
790 */
791 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
792 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
793
794 lacpdu_header->lacpdu = port->lacpdu;
795
796 dev_queue_xmit(skb);
797
798 return 0;
799 }
800
801 /**
802 * ad_marker_send - send marker information/response on a given port
803 * @port: the port we're looking at
804 * @marker: marker data to send
805 *
806 * Returns: 0 on success
807 * < 0 on error
808 */
809 static int ad_marker_send(struct port *port, struct bond_marker *marker)
810 {
811 struct slave *slave = port->slave;
812 struct sk_buff *skb;
813 struct bond_marker_header *marker_header;
814 int length = sizeof(struct bond_marker_header);
815
816 skb = dev_alloc_skb(length + 16);
817 if (!skb)
818 return -ENOMEM;
819
820 skb_reserve(skb, 16);
821
822 skb->dev = slave->dev;
823 skb_reset_mac_header(skb);
824 skb->network_header = skb->mac_header + ETH_HLEN;
825 skb->protocol = PKT_TYPE_LACPDU;
826
827 marker_header = (struct bond_marker_header *)skb_put(skb, length);
828
829 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
830 /* Note: source address is set to be the member's PERMANENT address,
831 * because we use it to identify loopback MARKERs in receive.
832 */
833 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
834 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
835
836 marker_header->marker = *marker;
837
838 dev_queue_xmit(skb);
839
840 return 0;
841 }
842
843 /**
844 * ad_mux_machine - handle a port's mux state machine
845 * @port: the port we're looking at
846 * @update_slave_arr: Does slave array need update?
847 */
848 static void ad_mux_machine(struct port *port, bool *update_slave_arr)
849 {
850 mux_states_t last_state;
851
852 /* keep current State Machine state to compare later if it was
853 * changed
854 */
855 last_state = port->sm_mux_state;
856
857 if (port->sm_vars & AD_PORT_BEGIN) {
858 port->sm_mux_state = AD_MUX_DETACHED;
859 } else {
860 switch (port->sm_mux_state) {
861 case AD_MUX_DETACHED:
862 if ((port->sm_vars & AD_PORT_SELECTED)
863 || (port->sm_vars & AD_PORT_STANDBY))
864 /* if SELECTED or STANDBY */
865 port->sm_mux_state = AD_MUX_WAITING;
866 break;
867 case AD_MUX_WAITING:
868 /* if SELECTED == FALSE return to DETACH state */
869 if (!(port->sm_vars & AD_PORT_SELECTED)) {
870 port->sm_vars &= ~AD_PORT_READY_N;
871 /* in order to withhold the Selection Logic to
872 * check all ports READY_N value every callback
873 * cycle to update ready variable, we check
874 * READY_N and update READY here
875 */
876 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
877 port->sm_mux_state = AD_MUX_DETACHED;
878 break;
879 }
880
881 /* check if the wait_while_timer expired */
882 if (port->sm_mux_timer_counter
883 && !(--port->sm_mux_timer_counter))
884 port->sm_vars |= AD_PORT_READY_N;
885
886 /* in order to withhold the selection logic to check
887 * all ports READY_N value every callback cycle to
888 * update ready variable, we check READY_N and update
889 * READY here
890 */
891 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
892
893 /* if the wait_while_timer expired, and the port is
894 * in READY state, move to ATTACHED state
895 */
896 if ((port->sm_vars & AD_PORT_READY)
897 && !port->sm_mux_timer_counter)
898 port->sm_mux_state = AD_MUX_ATTACHED;
899 break;
900 case AD_MUX_ATTACHED:
901 /* check also if agg_select_timer expired (so the
902 * edable port will take place only after this timer)
903 */
904 if ((port->sm_vars & AD_PORT_SELECTED) &&
905 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
906 !__check_agg_selection_timer(port)) {
907 if (port->aggregator->is_active)
908 port->sm_mux_state =
909 AD_MUX_COLLECTING_DISTRIBUTING;
910 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
911 (port->sm_vars & AD_PORT_STANDBY)) {
912 /* if UNSELECTED or STANDBY */
913 port->sm_vars &= ~AD_PORT_READY_N;
914 /* in order to withhold the selection logic to
915 * check all ports READY_N value every callback
916 * cycle to update ready variable, we check
917 * READY_N and update READY here
918 */
919 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
920 port->sm_mux_state = AD_MUX_DETACHED;
921 } else if (port->aggregator->is_active) {
922 port->actor_oper_port_state |=
923 AD_STATE_SYNCHRONIZATION;
924 }
925 break;
926 case AD_MUX_COLLECTING_DISTRIBUTING:
927 if (!(port->sm_vars & AD_PORT_SELECTED) ||
928 (port->sm_vars & AD_PORT_STANDBY) ||
929 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
930 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
931 port->sm_mux_state = AD_MUX_ATTACHED;
932 } else {
933 /* if port state hasn't changed make
934 * sure that a collecting distributing
935 * port in an active aggregator is enabled
936 */
937 if (port->aggregator &&
938 port->aggregator->is_active &&
939 !__port_is_enabled(port)) {
940
941 __enable_port(port);
942 }
943 }
944 break;
945 default:
946 break;
947 }
948 }
949
950 /* check if the state machine was changed */
951 if (port->sm_mux_state != last_state) {
952 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
953 port->actor_port_number,
954 port->slave->dev->name,
955 last_state,
956 port->sm_mux_state);
957 switch (port->sm_mux_state) {
958 case AD_MUX_DETACHED:
959 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
960 ad_disable_collecting_distributing(port,
961 update_slave_arr);
962 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
963 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
964 port->ntt = true;
965 break;
966 case AD_MUX_WAITING:
967 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
968 break;
969 case AD_MUX_ATTACHED:
970 if (port->aggregator->is_active)
971 port->actor_oper_port_state |=
972 AD_STATE_SYNCHRONIZATION;
973 else
974 port->actor_oper_port_state &=
975 ~AD_STATE_SYNCHRONIZATION;
976 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
977 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
978 ad_disable_collecting_distributing(port,
979 update_slave_arr);
980 port->ntt = true;
981 break;
982 case AD_MUX_COLLECTING_DISTRIBUTING:
983 port->actor_oper_port_state |= AD_STATE_COLLECTING;
984 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
985 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
986 ad_enable_collecting_distributing(port,
987 update_slave_arr);
988 port->ntt = true;
989 break;
990 default:
991 break;
992 }
993 }
994 }
995
996 /**
997 * ad_rx_machine - handle a port's rx State Machine
998 * @lacpdu: the lacpdu we've received
999 * @port: the port we're looking at
1000 *
1001 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1002 * CURRENT. If timer expired set the state machine in the proper state.
1003 * In other cases, this function checks if we need to switch to other state.
1004 */
1005 static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1006 {
1007 rx_states_t last_state;
1008
1009 /* keep current State Machine state to compare later if it was
1010 * changed
1011 */
1012 last_state = port->sm_rx_state;
1013
1014 /* check if state machine should change state */
1015
1016 /* first, check if port was reinitialized */
1017 if (port->sm_vars & AD_PORT_BEGIN) {
1018 port->sm_rx_state = AD_RX_INITIALIZE;
1019 port->sm_vars |= AD_PORT_CHURNED;
1020 /* check if port is not enabled */
1021 } else if (!(port->sm_vars & AD_PORT_BEGIN)
1022 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1023 port->sm_rx_state = AD_RX_PORT_DISABLED;
1024 /* check if new lacpdu arrived */
1025 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1026 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1027 (port->sm_rx_state == AD_RX_CURRENT))) {
1028 if (port->sm_rx_state != AD_RX_CURRENT)
1029 port->sm_vars |= AD_PORT_CHURNED;
1030 port->sm_rx_timer_counter = 0;
1031 port->sm_rx_state = AD_RX_CURRENT;
1032 } else {
1033 /* if timer is on, and if it is expired */
1034 if (port->sm_rx_timer_counter &&
1035 !(--port->sm_rx_timer_counter)) {
1036 switch (port->sm_rx_state) {
1037 case AD_RX_EXPIRED:
1038 port->sm_rx_state = AD_RX_DEFAULTED;
1039 break;
1040 case AD_RX_CURRENT:
1041 port->sm_rx_state = AD_RX_EXPIRED;
1042 break;
1043 default:
1044 break;
1045 }
1046 } else {
1047 /* if no lacpdu arrived and no timer is on */
1048 switch (port->sm_rx_state) {
1049 case AD_RX_PORT_DISABLED:
1050 if (port->sm_vars & AD_PORT_MOVED)
1051 port->sm_rx_state = AD_RX_INITIALIZE;
1052 else if (port->is_enabled
1053 && (port->sm_vars
1054 & AD_PORT_LACP_ENABLED))
1055 port->sm_rx_state = AD_RX_EXPIRED;
1056 else if (port->is_enabled
1057 && ((port->sm_vars
1058 & AD_PORT_LACP_ENABLED) == 0))
1059 port->sm_rx_state = AD_RX_LACP_DISABLED;
1060 break;
1061 default:
1062 break;
1063
1064 }
1065 }
1066 }
1067
1068 /* check if the State machine was changed or new lacpdu arrived */
1069 if ((port->sm_rx_state != last_state) || (lacpdu)) {
1070 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1071 port->actor_port_number,
1072 port->slave->dev->name,
1073 last_state,
1074 port->sm_rx_state);
1075 switch (port->sm_rx_state) {
1076 case AD_RX_INITIALIZE:
1077 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1078 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1079 else
1080 port->sm_vars |= AD_PORT_LACP_ENABLED;
1081 port->sm_vars &= ~AD_PORT_SELECTED;
1082 __record_default(port);
1083 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1084 port->sm_vars &= ~AD_PORT_MOVED;
1085 port->sm_rx_state = AD_RX_PORT_DISABLED;
1086
1087 /* Fall Through */
1088 case AD_RX_PORT_DISABLED:
1089 port->sm_vars &= ~AD_PORT_MATCHED;
1090 break;
1091 case AD_RX_LACP_DISABLED:
1092 port->sm_vars &= ~AD_PORT_SELECTED;
1093 __record_default(port);
1094 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1095 port->sm_vars |= AD_PORT_MATCHED;
1096 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1097 break;
1098 case AD_RX_EXPIRED:
1099 /* Reset of the Synchronization flag (Standard 43.4.12)
1100 * This reset cause to disable this port in the
1101 * COLLECTING_DISTRIBUTING state of the mux machine in
1102 * case of EXPIRED even if LINK_DOWN didn't arrive for
1103 * the port.
1104 */
1105 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1106 port->sm_vars &= ~AD_PORT_MATCHED;
1107 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
1108 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1109 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1110 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1111 port->sm_vars |= AD_PORT_CHURNED;
1112 break;
1113 case AD_RX_DEFAULTED:
1114 __update_default_selected(port);
1115 __record_default(port);
1116 port->sm_vars |= AD_PORT_MATCHED;
1117 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1118 break;
1119 case AD_RX_CURRENT:
1120 /* detect loopback situation */
1121 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1122 &(port->actor_system))) {
1123 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
1124 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
1125 port->slave->dev->name);
1126 return;
1127 }
1128 __update_selected(lacpdu, port);
1129 __update_ntt(lacpdu, port);
1130 __record_pdu(lacpdu, port);
1131 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1132 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1133 break;
1134 default:
1135 break;
1136 }
1137 }
1138 }
1139
1140 /**
1141 * ad_churn_machine - handle port churn's state machine
1142 * @port: the port we're looking at
1143 *
1144 */
1145 static void ad_churn_machine(struct port *port)
1146 {
1147 if (port->sm_vars & AD_PORT_CHURNED) {
1148 port->sm_vars &= ~AD_PORT_CHURNED;
1149 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1150 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1151 port->sm_churn_actor_timer_counter =
1152 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1153 port->sm_churn_partner_timer_counter =
1154 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1155 return;
1156 }
1157 if (port->sm_churn_actor_timer_counter &&
1158 !(--port->sm_churn_actor_timer_counter) &&
1159 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1160 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1161 port->sm_churn_actor_state = AD_NO_CHURN;
1162 } else {
1163 port->churn_actor_count++;
1164 port->sm_churn_actor_state = AD_CHURN;
1165 }
1166 }
1167 if (port->sm_churn_partner_timer_counter &&
1168 !(--port->sm_churn_partner_timer_counter) &&
1169 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1170 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1171 port->sm_churn_partner_state = AD_NO_CHURN;
1172 } else {
1173 port->churn_partner_count++;
1174 port->sm_churn_partner_state = AD_CHURN;
1175 }
1176 }
1177 }
1178
1179 /**
1180 * ad_tx_machine - handle a port's tx state machine
1181 * @port: the port we're looking at
1182 */
1183 static void ad_tx_machine(struct port *port)
1184 {
1185 /* check if tx timer expired, to verify that we do not send more than
1186 * 3 packets per second
1187 */
1188 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1189 /* check if there is something to send */
1190 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1191 __update_lacpdu_from_port(port);
1192
1193 if (ad_lacpdu_send(port) >= 0) {
1194 pr_debug("Sent LACPDU on port %d\n",
1195 port->actor_port_number);
1196
1197 /* mark ntt as false, so it will not be sent
1198 * again until demanded
1199 */
1200 port->ntt = false;
1201 }
1202 }
1203 /* restart tx timer(to verify that we will not exceed
1204 * AD_MAX_TX_IN_SECOND
1205 */
1206 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1207 }
1208 }
1209
1210 /**
1211 * ad_periodic_machine - handle a port's periodic state machine
1212 * @port: the port we're looking at
1213 *
1214 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1215 */
1216 static void ad_periodic_machine(struct port *port)
1217 {
1218 periodic_states_t last_state;
1219
1220 /* keep current state machine state to compare later if it was changed */
1221 last_state = port->sm_periodic_state;
1222
1223 /* check if port was reinitialized */
1224 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1225 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1226 ) {
1227 port->sm_periodic_state = AD_NO_PERIODIC;
1228 }
1229 /* check if state machine should change state */
1230 else if (port->sm_periodic_timer_counter) {
1231 /* check if periodic state machine expired */
1232 if (!(--port->sm_periodic_timer_counter)) {
1233 /* if expired then do tx */
1234 port->sm_periodic_state = AD_PERIODIC_TX;
1235 } else {
1236 /* If not expired, check if there is some new timeout
1237 * parameter from the partner state
1238 */
1239 switch (port->sm_periodic_state) {
1240 case AD_FAST_PERIODIC:
1241 if (!(port->partner_oper.port_state
1242 & AD_STATE_LACP_TIMEOUT))
1243 port->sm_periodic_state = AD_SLOW_PERIODIC;
1244 break;
1245 case AD_SLOW_PERIODIC:
1246 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1247 port->sm_periodic_timer_counter = 0;
1248 port->sm_periodic_state = AD_PERIODIC_TX;
1249 }
1250 break;
1251 default:
1252 break;
1253 }
1254 }
1255 } else {
1256 switch (port->sm_periodic_state) {
1257 case AD_NO_PERIODIC:
1258 port->sm_periodic_state = AD_FAST_PERIODIC;
1259 break;
1260 case AD_PERIODIC_TX:
1261 if (!(port->partner_oper.port_state &
1262 AD_STATE_LACP_TIMEOUT))
1263 port->sm_periodic_state = AD_SLOW_PERIODIC;
1264 else
1265 port->sm_periodic_state = AD_FAST_PERIODIC;
1266 break;
1267 default:
1268 break;
1269 }
1270 }
1271
1272 /* check if the state machine was changed */
1273 if (port->sm_periodic_state != last_state) {
1274 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1275 port->actor_port_number, last_state,
1276 port->sm_periodic_state);
1277 switch (port->sm_periodic_state) {
1278 case AD_NO_PERIODIC:
1279 port->sm_periodic_timer_counter = 0;
1280 break;
1281 case AD_FAST_PERIODIC:
1282 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1283 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1284 break;
1285 case AD_SLOW_PERIODIC:
1286 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1287 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1288 break;
1289 case AD_PERIODIC_TX:
1290 port->ntt = true;
1291 break;
1292 default:
1293 break;
1294 }
1295 }
1296 }
1297
1298 /**
1299 * ad_port_selection_logic - select aggregation groups
1300 * @port: the port we're looking at
1301 * @update_slave_arr: Does slave array need update?
1302 *
1303 * Select aggregation groups, and assign each port for it's aggregetor. The
1304 * selection logic is called in the inititalization (after all the handshkes),
1305 * and after every lacpdu receive (if selected is off).
1306 */
1307 static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1308 {
1309 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1310 struct port *last_port = NULL, *curr_port;
1311 struct list_head *iter;
1312 struct bonding *bond;
1313 struct slave *slave;
1314 int found = 0;
1315
1316 /* if the port is already Selected, do nothing */
1317 if (port->sm_vars & AD_PORT_SELECTED)
1318 return;
1319
1320 bond = __get_bond_by_port(port);
1321
1322 /* if the port is connected to other aggregator, detach it */
1323 if (port->aggregator) {
1324 /* detach the port from its former aggregator */
1325 temp_aggregator = port->aggregator;
1326 for (curr_port = temp_aggregator->lag_ports; curr_port;
1327 last_port = curr_port,
1328 curr_port = curr_port->next_port_in_aggregator) {
1329 if (curr_port == port) {
1330 temp_aggregator->num_of_ports--;
1331 /* if it is the first port attached to the
1332 * aggregator
1333 */
1334 if (!last_port) {
1335 temp_aggregator->lag_ports =
1336 port->next_port_in_aggregator;
1337 } else {
1338 /* not the first port attached to the
1339 * aggregator
1340 */
1341 last_port->next_port_in_aggregator =
1342 port->next_port_in_aggregator;
1343 }
1344
1345 /* clear the port's relations to this
1346 * aggregator
1347 */
1348 port->aggregator = NULL;
1349 port->next_port_in_aggregator = NULL;
1350 port->actor_port_aggregator_identifier = 0;
1351
1352 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1353 port->actor_port_number,
1354 temp_aggregator->aggregator_identifier);
1355 /* if the aggregator is empty, clear its
1356 * parameters, and set it ready to be attached
1357 */
1358 if (!temp_aggregator->lag_ports)
1359 ad_clear_agg(temp_aggregator);
1360 break;
1361 }
1362 }
1363 if (!curr_port) {
1364 /* meaning: the port was related to an aggregator
1365 * but was not on the aggregator port list
1366 */
1367 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1368 port->slave->bond->dev->name,
1369 port->actor_port_number,
1370 port->slave->dev->name,
1371 port->aggregator->aggregator_identifier);
1372 }
1373 }
1374 /* search on all aggregators for a suitable aggregator for this port */
1375 bond_for_each_slave(bond, slave, iter) {
1376 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1377
1378 /* keep a free aggregator for later use(if needed) */
1379 if (!aggregator->lag_ports) {
1380 if (!free_aggregator)
1381 free_aggregator = aggregator;
1382 continue;
1383 }
1384 /* check if current aggregator suits us */
1385 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1386 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1387 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1388 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1389 ) &&
1390 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1391 !aggregator->is_individual) /* but is not individual OR */
1392 )
1393 ) {
1394 /* attach to the founded aggregator */
1395 port->aggregator = aggregator;
1396 port->actor_port_aggregator_identifier =
1397 port->aggregator->aggregator_identifier;
1398 port->next_port_in_aggregator = aggregator->lag_ports;
1399 port->aggregator->num_of_ports++;
1400 aggregator->lag_ports = port;
1401 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1402 port->actor_port_number,
1403 port->aggregator->aggregator_identifier);
1404
1405 /* mark this port as selected */
1406 port->sm_vars |= AD_PORT_SELECTED;
1407 found = 1;
1408 break;
1409 }
1410 }
1411
1412 /* the port couldn't find an aggregator - attach it to a new
1413 * aggregator
1414 */
1415 if (!found) {
1416 if (free_aggregator) {
1417 /* assign port a new aggregator */
1418 port->aggregator = free_aggregator;
1419 port->actor_port_aggregator_identifier =
1420 port->aggregator->aggregator_identifier;
1421
1422 /* update the new aggregator's parameters
1423 * if port was responsed from the end-user
1424 */
1425 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
1426 /* if port is full duplex */
1427 port->aggregator->is_individual = false;
1428 else
1429 port->aggregator->is_individual = true;
1430
1431 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1432 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1433 port->aggregator->partner_system =
1434 port->partner_oper.system;
1435 port->aggregator->partner_system_priority =
1436 port->partner_oper.system_priority;
1437 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1438 port->aggregator->receive_state = 1;
1439 port->aggregator->transmit_state = 1;
1440 port->aggregator->lag_ports = port;
1441 port->aggregator->num_of_ports++;
1442
1443 /* mark this port as selected */
1444 port->sm_vars |= AD_PORT_SELECTED;
1445
1446 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1447 port->actor_port_number,
1448 port->aggregator->aggregator_identifier);
1449 } else {
1450 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1451 port->actor_port_number, port->slave->dev->name);
1452 }
1453 }
1454 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1455 * in all aggregator's ports, else set ready=FALSE in all
1456 * aggregator's ports
1457 */
1458 __set_agg_ports_ready(port->aggregator,
1459 __agg_ports_are_ready(port->aggregator));
1460
1461 aggregator = __get_first_agg(port);
1462 ad_agg_selection_logic(aggregator, update_slave_arr);
1463
1464 if (!port->aggregator->is_active)
1465 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1466 }
1467
1468 /* Decide if "agg" is a better choice for the new active aggregator that
1469 * the current best, according to the ad_select policy.
1470 */
1471 static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1472 struct aggregator *curr)
1473 {
1474 /* 0. If no best, select current.
1475 *
1476 * 1. If the current agg is not individual, and the best is
1477 * individual, select current.
1478 *
1479 * 2. If current agg is individual and the best is not, keep best.
1480 *
1481 * 3. Therefore, current and best are both individual or both not
1482 * individual, so:
1483 *
1484 * 3a. If current agg partner replied, and best agg partner did not,
1485 * select current.
1486 *
1487 * 3b. If current agg partner did not reply and best agg partner
1488 * did reply, keep best.
1489 *
1490 * 4. Therefore, current and best both have partner replies or
1491 * both do not, so perform selection policy:
1492 *
1493 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1494 * select by bandwidth.
1495 *
1496 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1497 */
1498 if (!best)
1499 return curr;
1500
1501 if (!curr->is_individual && best->is_individual)
1502 return curr;
1503
1504 if (curr->is_individual && !best->is_individual)
1505 return best;
1506
1507 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1508 return curr;
1509
1510 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1511 return best;
1512
1513 switch (__get_agg_selection_mode(curr->lag_ports)) {
1514 case BOND_AD_COUNT:
1515 if (curr->num_of_ports > best->num_of_ports)
1516 return curr;
1517
1518 if (curr->num_of_ports < best->num_of_ports)
1519 return best;
1520
1521 /*FALLTHROUGH*/
1522 case BOND_AD_STABLE:
1523 case BOND_AD_BANDWIDTH:
1524 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1525 return curr;
1526
1527 break;
1528
1529 default:
1530 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1531 curr->slave->bond->dev->name,
1532 __get_agg_selection_mode(curr->lag_ports));
1533 break;
1534 }
1535
1536 return best;
1537 }
1538
1539 static int agg_device_up(const struct aggregator *agg)
1540 {
1541 struct port *port = agg->lag_ports;
1542
1543 if (!port)
1544 return 0;
1545
1546 return netif_running(port->slave->dev) &&
1547 netif_carrier_ok(port->slave->dev);
1548 }
1549
1550 /**
1551 * ad_agg_selection_logic - select an aggregation group for a team
1552 * @aggregator: the aggregator we're looking at
1553 * @update_slave_arr: Does slave array need update?
1554 *
1555 * It is assumed that only one aggregator may be selected for a team.
1556 *
1557 * The logic of this function is to select the aggregator according to
1558 * the ad_select policy:
1559 *
1560 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1561 * it, and to reselect the active aggregator only if the previous
1562 * aggregator has no more ports related to it.
1563 *
1564 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1565 * bandwidth, and reselect whenever a link state change takes place or the
1566 * set of slaves in the bond changes.
1567 *
1568 * BOND_AD_COUNT: select the aggregator with largest number of ports
1569 * (slaves), and reselect whenever a link state change takes place or the
1570 * set of slaves in the bond changes.
1571 *
1572 * FIXME: this function MUST be called with the first agg in the bond, or
1573 * __get_active_agg() won't work correctly. This function should be better
1574 * called with the bond itself, and retrieve the first agg from it.
1575 */
1576 static void ad_agg_selection_logic(struct aggregator *agg,
1577 bool *update_slave_arr)
1578 {
1579 struct aggregator *best, *active, *origin;
1580 struct bonding *bond = agg->slave->bond;
1581 struct list_head *iter;
1582 struct slave *slave;
1583 struct port *port;
1584
1585 rcu_read_lock();
1586 origin = agg;
1587 active = __get_active_agg(agg);
1588 best = (active && agg_device_up(active)) ? active : NULL;
1589
1590 bond_for_each_slave_rcu(bond, slave, iter) {
1591 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1592
1593 agg->is_active = 0;
1594
1595 if (agg->num_of_ports && agg_device_up(agg))
1596 best = ad_agg_selection_test(best, agg);
1597 }
1598
1599 if (best &&
1600 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1601 /* For the STABLE policy, don't replace the old active
1602 * aggregator if it's still active (it has an answering
1603 * partner) or if both the best and active don't have an
1604 * answering partner.
1605 */
1606 if (active && active->lag_ports &&
1607 active->lag_ports->is_enabled &&
1608 (__agg_has_partner(active) ||
1609 (!__agg_has_partner(active) &&
1610 !__agg_has_partner(best)))) {
1611 if (!(!active->actor_oper_aggregator_key &&
1612 best->actor_oper_aggregator_key)) {
1613 best = NULL;
1614 active->is_active = 1;
1615 }
1616 }
1617 }
1618
1619 if (best && (best == active)) {
1620 best = NULL;
1621 active->is_active = 1;
1622 }
1623
1624 /* if there is new best aggregator, activate it */
1625 if (best) {
1626 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1627 best->aggregator_identifier, best->num_of_ports,
1628 best->actor_oper_aggregator_key,
1629 best->partner_oper_aggregator_key,
1630 best->is_individual, best->is_active);
1631 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1632 best->lag_ports, best->slave,
1633 best->slave ? best->slave->dev->name : "NULL");
1634
1635 bond_for_each_slave_rcu(bond, slave, iter) {
1636 agg = &(SLAVE_AD_INFO(slave)->aggregator);
1637
1638 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1639 agg->aggregator_identifier, agg->num_of_ports,
1640 agg->actor_oper_aggregator_key,
1641 agg->partner_oper_aggregator_key,
1642 agg->is_individual, agg->is_active);
1643 }
1644
1645 /* check if any partner replys */
1646 if (best->is_individual) {
1647 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1648 best->slave ?
1649 best->slave->bond->dev->name : "NULL");
1650 }
1651
1652 best->is_active = 1;
1653 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1654 best->aggregator_identifier);
1655 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1656 best->aggregator_identifier, best->num_of_ports,
1657 best->actor_oper_aggregator_key,
1658 best->partner_oper_aggregator_key,
1659 best->is_individual, best->is_active);
1660
1661 /* disable the ports that were related to the former
1662 * active_aggregator
1663 */
1664 if (active) {
1665 for (port = active->lag_ports; port;
1666 port = port->next_port_in_aggregator) {
1667 __disable_port(port);
1668 }
1669 }
1670 /* Slave array needs update. */
1671 *update_slave_arr = true;
1672 }
1673
1674 /* if the selected aggregator is of join individuals
1675 * (partner_system is NULL), enable their ports
1676 */
1677 active = __get_active_agg(origin);
1678
1679 if (active) {
1680 if (!__agg_has_partner(active)) {
1681 for (port = active->lag_ports; port;
1682 port = port->next_port_in_aggregator) {
1683 __enable_port(port);
1684 }
1685 }
1686 }
1687
1688 rcu_read_unlock();
1689
1690 bond_3ad_set_carrier(bond);
1691 }
1692
1693 /**
1694 * ad_clear_agg - clear a given aggregator's parameters
1695 * @aggregator: the aggregator we're looking at
1696 */
1697 static void ad_clear_agg(struct aggregator *aggregator)
1698 {
1699 if (aggregator) {
1700 aggregator->is_individual = false;
1701 aggregator->actor_admin_aggregator_key = 0;
1702 aggregator->actor_oper_aggregator_key = 0;
1703 aggregator->partner_system = null_mac_addr;
1704 aggregator->partner_system_priority = 0;
1705 aggregator->partner_oper_aggregator_key = 0;
1706 aggregator->receive_state = 0;
1707 aggregator->transmit_state = 0;
1708 aggregator->lag_ports = NULL;
1709 aggregator->is_active = 0;
1710 aggregator->num_of_ports = 0;
1711 pr_debug("LAG %d was cleared\n",
1712 aggregator->aggregator_identifier);
1713 }
1714 }
1715
1716 /**
1717 * ad_initialize_agg - initialize a given aggregator's parameters
1718 * @aggregator: the aggregator we're looking at
1719 */
1720 static void ad_initialize_agg(struct aggregator *aggregator)
1721 {
1722 if (aggregator) {
1723 ad_clear_agg(aggregator);
1724
1725 aggregator->aggregator_mac_address = null_mac_addr;
1726 aggregator->aggregator_identifier = 0;
1727 aggregator->slave = NULL;
1728 }
1729 }
1730
1731 /**
1732 * ad_initialize_port - initialize a given port's parameters
1733 * @aggregator: the aggregator we're looking at
1734 * @lacp_fast: boolean. whether fast periodic should be used
1735 */
1736 static void ad_initialize_port(struct port *port, int lacp_fast)
1737 {
1738 static const struct port_params tmpl = {
1739 .system_priority = 0xffff,
1740 .key = 1,
1741 .port_number = 1,
1742 .port_priority = 0xff,
1743 .port_state = 1,
1744 };
1745 static const struct lacpdu lacpdu = {
1746 .subtype = 0x01,
1747 .version_number = 0x01,
1748 .tlv_type_actor_info = 0x01,
1749 .actor_information_length = 0x14,
1750 .tlv_type_partner_info = 0x02,
1751 .partner_information_length = 0x14,
1752 .tlv_type_collector_info = 0x03,
1753 .collector_information_length = 0x10,
1754 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1755 };
1756
1757 if (port) {
1758 port->actor_port_number = 1;
1759 port->actor_port_priority = 0xff;
1760 port->actor_system = null_mac_addr;
1761 port->actor_system_priority = 0xffff;
1762 port->actor_port_aggregator_identifier = 0;
1763 port->ntt = false;
1764 port->actor_admin_port_key = 1;
1765 port->actor_oper_port_key = 1;
1766 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1767 AD_STATE_LACP_ACTIVITY;
1768 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1769 AD_STATE_LACP_ACTIVITY;
1770
1771 if (lacp_fast)
1772 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1773
1774 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1775 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1776
1777 port->is_enabled = true;
1778 /* private parameters */
1779 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1780 port->sm_rx_state = 0;
1781 port->sm_rx_timer_counter = 0;
1782 port->sm_periodic_state = 0;
1783 port->sm_periodic_timer_counter = 0;
1784 port->sm_mux_state = 0;
1785 port->sm_mux_timer_counter = 0;
1786 port->sm_tx_state = 0;
1787 port->sm_tx_timer_counter = 0;
1788 port->slave = NULL;
1789 port->aggregator = NULL;
1790 port->next_port_in_aggregator = NULL;
1791 port->transaction_id = 0;
1792
1793 port->sm_churn_actor_timer_counter = 0;
1794 port->sm_churn_actor_state = 0;
1795 port->churn_actor_count = 0;
1796 port->sm_churn_partner_timer_counter = 0;
1797 port->sm_churn_partner_state = 0;
1798 port->churn_partner_count = 0;
1799
1800 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1801 }
1802 }
1803
1804 /**
1805 * ad_enable_collecting_distributing - enable a port's transmit/receive
1806 * @port: the port we're looking at
1807 * @update_slave_arr: Does slave array need update?
1808 *
1809 * Enable @port if it's in an active aggregator
1810 */
1811 static void ad_enable_collecting_distributing(struct port *port,
1812 bool *update_slave_arr)
1813 {
1814 if (port->aggregator->is_active) {
1815 pr_debug("Enabling port %d(LAG %d)\n",
1816 port->actor_port_number,
1817 port->aggregator->aggregator_identifier);
1818 __enable_port(port);
1819 /* Slave array needs update */
1820 *update_slave_arr = true;
1821 }
1822 }
1823
1824 /**
1825 * ad_disable_collecting_distributing - disable a port's transmit/receive
1826 * @port: the port we're looking at
1827 * @update_slave_arr: Does slave array need update?
1828 */
1829 static void ad_disable_collecting_distributing(struct port *port,
1830 bool *update_slave_arr)
1831 {
1832 if (port->aggregator &&
1833 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1834 &(null_mac_addr))) {
1835 pr_debug("Disabling port %d(LAG %d)\n",
1836 port->actor_port_number,
1837 port->aggregator->aggregator_identifier);
1838 __disable_port(port);
1839 /* Slave array needs an update */
1840 *update_slave_arr = true;
1841 }
1842 }
1843
1844 /**
1845 * ad_marker_info_received - handle receive of a Marker information frame
1846 * @marker_info: Marker info received
1847 * @port: the port we're looking at
1848 */
1849 static void ad_marker_info_received(struct bond_marker *marker_info,
1850 struct port *port)
1851 {
1852 struct bond_marker marker;
1853
1854 /* copy the received marker data to the response marker */
1855 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1856 /* change the marker subtype to marker response */
1857 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1858
1859 /* send the marker response */
1860 if (ad_marker_send(port, &marker) >= 0) {
1861 pr_debug("Sent Marker Response on port %d\n",
1862 port->actor_port_number);
1863 }
1864 }
1865
1866 /**
1867 * ad_marker_response_received - handle receive of a marker response frame
1868 * @marker: marker PDU received
1869 * @port: the port we're looking at
1870 *
1871 * This function does nothing since we decided not to implement send and handle
1872 * response for marker PDU's, in this stage, but only to respond to marker
1873 * information.
1874 */
1875 static void ad_marker_response_received(struct bond_marker *marker,
1876 struct port *port)
1877 {
1878 marker = NULL;
1879 port = NULL;
1880 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1881 }
1882
1883 /* ========= AD exported functions to the main bonding code ========= */
1884
1885 /* Check aggregators status in team every T seconds */
1886 #define AD_AGGREGATOR_SELECTION_TIMER 8
1887
1888 /**
1889 * bond_3ad_initiate_agg_selection - initate aggregator selection
1890 * @bond: bonding struct
1891 *
1892 * Set the aggregation selection timer, to initiate an agg selection in
1893 * the very near future. Called during first initialization, and during
1894 * any down to up transitions of the bond.
1895 */
1896 void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1897 {
1898 BOND_AD_INFO(bond).agg_select_timer = timeout;
1899 }
1900
1901 /**
1902 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1903 * @bond: bonding struct to work on
1904 * @tick_resolution: tick duration (millisecond resolution)
1905 *
1906 * Can be called only after the mac address of the bond is set.
1907 */
1908 void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
1909 {
1910 /* check that the bond is not initialized yet */
1911 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1912 bond->dev->dev_addr)) {
1913
1914 BOND_AD_INFO(bond).aggregator_identifier = 0;
1915
1916 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1917 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1918
1919 /* initialize how many times this module is called in one
1920 * second (should be about every 100ms)
1921 */
1922 ad_ticks_per_sec = tick_resolution;
1923
1924 bond_3ad_initiate_agg_selection(bond,
1925 AD_AGGREGATOR_SELECTION_TIMER *
1926 ad_ticks_per_sec);
1927 }
1928 }
1929
1930 /**
1931 * bond_3ad_bind_slave - initialize a slave's port
1932 * @slave: slave struct to work on
1933 *
1934 * Returns: 0 on success
1935 * < 0 on error
1936 */
1937 void bond_3ad_bind_slave(struct slave *slave)
1938 {
1939 struct bonding *bond = bond_get_bond_by_slave(slave);
1940 struct port *port;
1941 struct aggregator *aggregator;
1942
1943 /* check that the slave has not been initialized yet. */
1944 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1945
1946 /* port initialization */
1947 port = &(SLAVE_AD_INFO(slave)->port);
1948
1949 ad_initialize_port(port, bond->params.lacp_fast);
1950
1951 port->slave = slave;
1952 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
1953 /* key is determined according to the link speed, duplex and user key(which
1954 * is yet not supported)
1955 */
1956 port->actor_admin_port_key = 0;
1957 port->actor_admin_port_key |= __get_duplex(port);
1958 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1959 port->actor_oper_port_key = port->actor_admin_port_key;
1960 /* if the port is not full duplex, then the port should be not
1961 * lacp Enabled
1962 */
1963 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1964 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1965 /* actor system is the bond's system */
1966 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1967 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1968 * lacpdu's are sent in one second)
1969 */
1970 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1971 port->aggregator = NULL;
1972 port->next_port_in_aggregator = NULL;
1973
1974 __disable_port(port);
1975
1976 /* aggregator initialization */
1977 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1978
1979 ad_initialize_agg(aggregator);
1980
1981 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1982 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1983 aggregator->slave = slave;
1984 aggregator->is_active = 0;
1985 aggregator->num_of_ports = 0;
1986 }
1987 }
1988
1989 /**
1990 * bond_3ad_unbind_slave - deinitialize a slave's port
1991 * @slave: slave struct to work on
1992 *
1993 * Search for the aggregator that is related to this port, remove the
1994 * aggregator and assign another aggregator for other port related to it
1995 * (if any), and remove the port.
1996 */
1997 void bond_3ad_unbind_slave(struct slave *slave)
1998 {
1999 struct port *port, *prev_port, *temp_port;
2000 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2001 int select_new_active_agg = 0;
2002 struct bonding *bond = slave->bond;
2003 struct slave *slave_iter;
2004 struct list_head *iter;
2005 bool dummy_slave_update; /* Ignore this value as caller updates array */
2006
2007 /* Sync against bond_3ad_state_machine_handler() */
2008 spin_lock_bh(&bond->mode_lock);
2009 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2010 port = &(SLAVE_AD_INFO(slave)->port);
2011
2012 /* if slave is null, the whole port is not initialized */
2013 if (!port->slave) {
2014 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2015 slave->dev->name);
2016 goto out;
2017 }
2018
2019 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2020 aggregator->aggregator_identifier);
2021
2022 /* Tell the partner that this port is not suitable for aggregation */
2023 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2024 __update_lacpdu_from_port(port);
2025 ad_lacpdu_send(port);
2026
2027 /* check if this aggregator is occupied */
2028 if (aggregator->lag_ports) {
2029 /* check if there are other ports related to this aggregator
2030 * except the port related to this slave(thats ensure us that
2031 * there is a reason to search for new aggregator, and that we
2032 * will find one
2033 */
2034 if ((aggregator->lag_ports != port) ||
2035 (aggregator->lag_ports->next_port_in_aggregator)) {
2036 /* find new aggregator for the related port(s) */
2037 bond_for_each_slave(bond, slave_iter, iter) {
2038 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2039 /* if the new aggregator is empty, or it is
2040 * connected to our port only
2041 */
2042 if (!new_aggregator->lag_ports ||
2043 ((new_aggregator->lag_ports == port) &&
2044 !new_aggregator->lag_ports->next_port_in_aggregator))
2045 break;
2046 }
2047 if (!slave_iter)
2048 new_aggregator = NULL;
2049
2050 /* if new aggregator found, copy the aggregator's
2051 * parameters and connect the related lag_ports to the
2052 * new aggregator
2053 */
2054 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
2055 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2056 aggregator->aggregator_identifier,
2057 new_aggregator->aggregator_identifier);
2058
2059 if ((new_aggregator->lag_ports == port) &&
2060 new_aggregator->is_active) {
2061 netdev_info(bond->dev, "Removing an active aggregator\n");
2062 select_new_active_agg = 1;
2063 }
2064
2065 new_aggregator->is_individual = aggregator->is_individual;
2066 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2067 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2068 new_aggregator->partner_system = aggregator->partner_system;
2069 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2070 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2071 new_aggregator->receive_state = aggregator->receive_state;
2072 new_aggregator->transmit_state = aggregator->transmit_state;
2073 new_aggregator->lag_ports = aggregator->lag_ports;
2074 new_aggregator->is_active = aggregator->is_active;
2075 new_aggregator->num_of_ports = aggregator->num_of_ports;
2076
2077 /* update the information that is written on
2078 * the ports about the aggregator
2079 */
2080 for (temp_port = aggregator->lag_ports; temp_port;
2081 temp_port = temp_port->next_port_in_aggregator) {
2082 temp_port->aggregator = new_aggregator;
2083 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2084 }
2085
2086 ad_clear_agg(aggregator);
2087
2088 if (select_new_active_agg)
2089 ad_agg_selection_logic(__get_first_agg(port),
2090 &dummy_slave_update);
2091 } else {
2092 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
2093 }
2094 } else {
2095 /* in case that the only port related to this
2096 * aggregator is the one we want to remove
2097 */
2098 select_new_active_agg = aggregator->is_active;
2099 ad_clear_agg(aggregator);
2100 if (select_new_active_agg) {
2101 netdev_info(bond->dev, "Removing an active aggregator\n");
2102 /* select new active aggregator */
2103 temp_aggregator = __get_first_agg(port);
2104 if (temp_aggregator)
2105 ad_agg_selection_logic(temp_aggregator,
2106 &dummy_slave_update);
2107 }
2108 }
2109 }
2110
2111 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
2112
2113 /* find the aggregator that this port is connected to */
2114 bond_for_each_slave(bond, slave_iter, iter) {
2115 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
2116 prev_port = NULL;
2117 /* search the port in the aggregator's related ports */
2118 for (temp_port = temp_aggregator->lag_ports; temp_port;
2119 prev_port = temp_port,
2120 temp_port = temp_port->next_port_in_aggregator) {
2121 if (temp_port == port) {
2122 /* the aggregator found - detach the port from
2123 * this aggregator
2124 */
2125 if (prev_port)
2126 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2127 else
2128 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2129 temp_aggregator->num_of_ports--;
2130 if (temp_aggregator->num_of_ports == 0) {
2131 select_new_active_agg = temp_aggregator->is_active;
2132 ad_clear_agg(temp_aggregator);
2133 if (select_new_active_agg) {
2134 netdev_info(bond->dev, "Removing an active aggregator\n");
2135 /* select new active aggregator */
2136 ad_agg_selection_logic(__get_first_agg(port),
2137 &dummy_slave_update);
2138 }
2139 }
2140 break;
2141 }
2142 }
2143 }
2144 port->slave = NULL;
2145
2146 out:
2147 spin_unlock_bh(&bond->mode_lock);
2148 }
2149
2150 /**
2151 * bond_3ad_state_machine_handler - handle state machines timeout
2152 * @bond: bonding struct to work on
2153 *
2154 * The state machine handling concept in this module is to check every tick
2155 * which state machine should operate any function. The execution order is
2156 * round robin, so when we have an interaction between state machines, the
2157 * reply of one to each other might be delayed until next tick.
2158 *
2159 * This function also complete the initialization when the agg_select_timer
2160 * times out, and it selects an aggregator for the ports that are yet not
2161 * related to any aggregator, and selects the active aggregator for a bond.
2162 */
2163 void bond_3ad_state_machine_handler(struct work_struct *work)
2164 {
2165 struct bonding *bond = container_of(work, struct bonding,
2166 ad_work.work);
2167 struct aggregator *aggregator;
2168 struct list_head *iter;
2169 struct slave *slave;
2170 struct port *port;
2171 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
2172 bool update_slave_arr = false;
2173
2174 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2175 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2176 * concurrently due to incoming LACPDU as well.
2177 */
2178 spin_lock_bh(&bond->mode_lock);
2179 rcu_read_lock();
2180
2181 /* check if there are any slaves */
2182 if (!bond_has_slaves(bond))
2183 goto re_arm;
2184
2185 /* check if agg_select_timer timer after initialize is timed out */
2186 if (BOND_AD_INFO(bond).agg_select_timer &&
2187 !(--BOND_AD_INFO(bond).agg_select_timer)) {
2188 slave = bond_first_slave_rcu(bond);
2189 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
2190
2191 /* select the active aggregator for the bond */
2192 if (port) {
2193 if (!port->slave) {
2194 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2195 bond->dev->name);
2196 goto re_arm;
2197 }
2198
2199 aggregator = __get_first_agg(port);
2200 ad_agg_selection_logic(aggregator, &update_slave_arr);
2201 }
2202 bond_3ad_set_carrier(bond);
2203 }
2204
2205 /* for each port run the state machines */
2206 bond_for_each_slave_rcu(bond, slave, iter) {
2207 port = &(SLAVE_AD_INFO(slave)->port);
2208 if (!port->slave) {
2209 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
2210 bond->dev->name);
2211 goto re_arm;
2212 }
2213
2214 ad_rx_machine(NULL, port);
2215 ad_periodic_machine(port);
2216 ad_port_selection_logic(port, &update_slave_arr);
2217 ad_mux_machine(port, &update_slave_arr);
2218 ad_tx_machine(port);
2219 ad_churn_machine(port);
2220
2221 /* turn off the BEGIN bit, since we already handled it */
2222 if (port->sm_vars & AD_PORT_BEGIN)
2223 port->sm_vars &= ~AD_PORT_BEGIN;
2224 }
2225
2226 re_arm:
2227 bond_for_each_slave_rcu(bond, slave, iter) {
2228 if (slave->should_notify) {
2229 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2230 break;
2231 }
2232 }
2233 rcu_read_unlock();
2234 spin_unlock_bh(&bond->mode_lock);
2235
2236 if (update_slave_arr)
2237 bond_slave_arr_work_rearm(bond, 0);
2238
2239 if (should_notify_rtnl && rtnl_trylock()) {
2240 bond_slave_state_notify(bond);
2241 rtnl_unlock();
2242 }
2243 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2244 }
2245
2246 /**
2247 * bond_3ad_rx_indication - handle a received frame
2248 * @lacpdu: received lacpdu
2249 * @slave: slave struct to work on
2250 * @length: length of the data received
2251 *
2252 * It is assumed that frames that were sent on this NIC don't returned as new
2253 * received frames (loopback). Since only the payload is given to this
2254 * function, it check for loopback.
2255 */
2256 static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2257 u16 length)
2258 {
2259 struct port *port;
2260 int ret = RX_HANDLER_ANOTHER;
2261
2262 if (length >= sizeof(struct lacpdu)) {
2263
2264 port = &(SLAVE_AD_INFO(slave)->port);
2265
2266 if (!port->slave) {
2267 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2268 slave->dev->name, slave->bond->dev->name);
2269 return ret;
2270 }
2271
2272 switch (lacpdu->subtype) {
2273 case AD_TYPE_LACPDU:
2274 ret = RX_HANDLER_CONSUMED;
2275 netdev_dbg(slave->bond->dev,
2276 "Received LACPDU on port %d slave %s\n",
2277 port->actor_port_number,
2278 slave->dev->name);
2279 /* Protect against concurrent state machines */
2280 spin_lock(&slave->bond->mode_lock);
2281 ad_rx_machine(lacpdu, port);
2282 spin_unlock(&slave->bond->mode_lock);
2283 break;
2284
2285 case AD_TYPE_MARKER:
2286 ret = RX_HANDLER_CONSUMED;
2287 /* No need to convert fields to Little Endian since we
2288 * don't use the marker's fields.
2289 */
2290
2291 switch (((struct bond_marker *)lacpdu)->tlv_type) {
2292 case AD_MARKER_INFORMATION_SUBTYPE:
2293 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2294 port->actor_port_number);
2295 ad_marker_info_received((struct bond_marker *)lacpdu, port);
2296 break;
2297
2298 case AD_MARKER_RESPONSE_SUBTYPE:
2299 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2300 port->actor_port_number);
2301 ad_marker_response_received((struct bond_marker *)lacpdu, port);
2302 break;
2303
2304 default:
2305 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2306 port->actor_port_number);
2307 }
2308 }
2309 }
2310 return ret;
2311 }
2312
2313 /**
2314 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2315 * @slave: slave struct to work on
2316 *
2317 * Handle reselection of aggregator (if needed) for this port.
2318 */
2319 void bond_3ad_adapter_speed_changed(struct slave *slave)
2320 {
2321 struct port *port;
2322
2323 port = &(SLAVE_AD_INFO(slave)->port);
2324
2325 /* if slave is null, the whole port is not initialized */
2326 if (!port->slave) {
2327 netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n",
2328 slave->dev->name);
2329 return;
2330 }
2331
2332 spin_lock_bh(&slave->bond->mode_lock);
2333
2334 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
2335 port->actor_oper_port_key = port->actor_admin_port_key |=
2336 (__get_link_speed(port) << 1);
2337 netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number);
2338 /* there is no need to reselect a new aggregator, just signal the
2339 * state machines to reinitialize
2340 */
2341 port->sm_vars |= AD_PORT_BEGIN;
2342
2343 spin_unlock_bh(&slave->bond->mode_lock);
2344 }
2345
2346 /**
2347 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2348 * @slave: slave struct to work on
2349 *
2350 * Handle reselection of aggregator (if needed) for this port.
2351 */
2352 void bond_3ad_adapter_duplex_changed(struct slave *slave)
2353 {
2354 struct port *port;
2355
2356 port = &(SLAVE_AD_INFO(slave)->port);
2357
2358 /* if slave is null, the whole port is not initialized */
2359 if (!port->slave) {
2360 netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n",
2361 slave->dev->name);
2362 return;
2363 }
2364
2365 spin_lock_bh(&slave->bond->mode_lock);
2366
2367 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
2368 port->actor_oper_port_key = port->actor_admin_port_key |=
2369 __get_duplex(port);
2370 netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n",
2371 port->actor_port_number, slave->dev->name);
2372 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
2373 port->sm_vars |= AD_PORT_LACP_ENABLED;
2374 /* there is no need to reselect a new aggregator, just signal the
2375 * state machines to reinitialize
2376 */
2377 port->sm_vars |= AD_PORT_BEGIN;
2378
2379 spin_unlock_bh(&slave->bond->mode_lock);
2380 }
2381
2382 /**
2383 * bond_3ad_handle_link_change - handle a slave's link status change indication
2384 * @slave: slave struct to work on
2385 * @status: whether the link is now up or down
2386 *
2387 * Handle reselection of aggregator (if needed) for this port.
2388 */
2389 void bond_3ad_handle_link_change(struct slave *slave, char link)
2390 {
2391 struct port *port;
2392
2393 port = &(SLAVE_AD_INFO(slave)->port);
2394
2395 /* if slave is null, the whole port is not initialized */
2396 if (!port->slave) {
2397 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2398 slave->dev->name);
2399 return;
2400 }
2401
2402 spin_lock_bh(&slave->bond->mode_lock);
2403 /* on link down we are zeroing duplex and speed since
2404 * some of the adaptors(ce1000.lan) report full duplex/speed
2405 * instead of N/A(duplex) / 0(speed).
2406 *
2407 * on link up we are forcing recheck on the duplex and speed since
2408 * some of he adaptors(ce1000.lan) report.
2409 */
2410 if (link == BOND_LINK_UP) {
2411 port->is_enabled = true;
2412 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
2413 port->actor_oper_port_key = port->actor_admin_port_key |=
2414 __get_duplex(port);
2415 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
2416 port->actor_oper_port_key = port->actor_admin_port_key |=
2417 (__get_link_speed(port) << 1);
2418 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
2419 port->sm_vars |= AD_PORT_LACP_ENABLED;
2420 } else {
2421 /* link has failed */
2422 port->is_enabled = false;
2423 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
2424 port->actor_oper_port_key = (port->actor_admin_port_key &=
2425 ~AD_SPEED_KEY_MASKS);
2426 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2427 }
2428 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2429 port->actor_port_number,
2430 link == BOND_LINK_UP ? "UP" : "DOWN");
2431 /* there is no need to reselect a new aggregator, just signal the
2432 * state machines to reinitialize
2433 */
2434 port->sm_vars |= AD_PORT_BEGIN;
2435
2436 spin_unlock_bh(&slave->bond->mode_lock);
2437
2438 /* RTNL is held and mode_lock is released so it's safe
2439 * to update slave_array here.
2440 */
2441 bond_update_slave_arr(slave->bond, NULL);
2442 }
2443
2444 /**
2445 * bond_3ad_set_carrier - set link state for bonding master
2446 * @bond - bonding structure
2447 *
2448 * if we have an active aggregator, we're up, if not, we're down.
2449 * Presumes that we cannot have an active aggregator if there are
2450 * no slaves with link up.
2451 *
2452 * This behavior complies with IEEE 802.3 section 43.3.9.
2453 *
2454 * Called by bond_set_carrier(). Return zero if carrier state does not
2455 * change, nonzero if it does.
2456 */
2457 int bond_3ad_set_carrier(struct bonding *bond)
2458 {
2459 struct aggregator *active;
2460 struct slave *first_slave;
2461 int ret = 1;
2462
2463 rcu_read_lock();
2464 first_slave = bond_first_slave_rcu(bond);
2465 if (!first_slave) {
2466 ret = 0;
2467 goto out;
2468 }
2469 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
2470 if (active) {
2471 /* are enough slaves available to consider link up? */
2472 if (active->num_of_ports < bond->params.min_links) {
2473 if (netif_carrier_ok(bond->dev)) {
2474 netif_carrier_off(bond->dev);
2475 goto out;
2476 }
2477 } else if (!netif_carrier_ok(bond->dev)) {
2478 netif_carrier_on(bond->dev);
2479 goto out;
2480 }
2481 } else if (netif_carrier_ok(bond->dev)) {
2482 netif_carrier_off(bond->dev);
2483 }
2484 out:
2485 rcu_read_unlock();
2486 return ret;
2487 }
2488
2489 /**
2490 * __bond_3ad_get_active_agg_info - get information of the active aggregator
2491 * @bond: bonding struct to work on
2492 * @ad_info: ad_info struct to fill with the bond's info
2493 *
2494 * Returns: 0 on success
2495 * < 0 on error
2496 */
2497 int __bond_3ad_get_active_agg_info(struct bonding *bond,
2498 struct ad_info *ad_info)
2499 {
2500 struct aggregator *aggregator = NULL;
2501 struct list_head *iter;
2502 struct slave *slave;
2503 struct port *port;
2504
2505 bond_for_each_slave_rcu(bond, slave, iter) {
2506 port = &(SLAVE_AD_INFO(slave)->port);
2507 if (port->aggregator && port->aggregator->is_active) {
2508 aggregator = port->aggregator;
2509 break;
2510 }
2511 }
2512
2513 if (!aggregator)
2514 return -1;
2515
2516 ad_info->aggregator_id = aggregator->aggregator_identifier;
2517 ad_info->ports = aggregator->num_of_ports;
2518 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2519 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2520 ether_addr_copy(ad_info->partner_system,
2521 aggregator->partner_system.mac_addr_value);
2522 return 0;
2523 }
2524
2525 int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2526 {
2527 int ret;
2528
2529 rcu_read_lock();
2530 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2531 rcu_read_unlock();
2532
2533 return ret;
2534 }
2535
2536 int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2537 struct slave *slave)
2538 {
2539 struct lacpdu *lacpdu, _lacpdu;
2540
2541 if (skb->protocol != PKT_TYPE_LACPDU)
2542 return RX_HANDLER_ANOTHER;
2543
2544 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2545 return RX_HANDLER_ANOTHER;
2546
2547 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2548 if (!lacpdu)
2549 return RX_HANDLER_ANOTHER;
2550
2551 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
2552 }
2553
2554 /**
2555 * bond_3ad_update_lacp_rate - change the lacp rate
2556 * @bond - bonding struct
2557 *
2558 * When modify lacp_rate parameter via sysfs,
2559 * update actor_oper_port_state of each port.
2560 *
2561 * Hold bond->mode_lock,
2562 * so we can modify port->actor_oper_port_state,
2563 * no matter bond is up or down.
2564 */
2565 void bond_3ad_update_lacp_rate(struct bonding *bond)
2566 {
2567 struct port *port = NULL;
2568 struct list_head *iter;
2569 struct slave *slave;
2570 int lacp_fast;
2571
2572 lacp_fast = bond->params.lacp_fast;
2573 spin_lock_bh(&bond->mode_lock);
2574 bond_for_each_slave(bond, slave, iter) {
2575 port = &(SLAVE_AD_INFO(slave)->port);
2576 if (lacp_fast)
2577 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2578 else
2579 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2580 }
2581 spin_unlock_bh(&bond->mode_lock);
2582 }
Linux with added FPC-III support