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bonding: use port_params in __update_selected()
[deliverable/linux.git] / drivers / net / bonding / bond_3ad.c
CommitLineData
1da177e4
LT		 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 *
1da177e4
LT		 21 */
22
1da177e4
LT		 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>
fd989c83 28#include <linux/etherdevice.h>
1da177e4
LT		 29#include <linux/if_bonding.h>
30#include <linux/pkt_sched.h>
e730c155 31#include <net/net_namespace.h>
1da177e4
LT		 32#include "bonding.h"
33#include "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 802.3ad standard)
61#define AD_PORT_BEGIN 0x1
62#define AD_PORT_LACP_ENABLED 0x2
63#define AD_PORT_ACTOR_CHURN 0x4
64#define AD_PORT_PARTNER_CHURN 0x8
65#define AD_PORT_READY 0x10
66#define AD_PORT_READY_N 0x20
67#define AD_PORT_MATCHED 0x40
68#define AD_PORT_STANDBY 0x80
69#define AD_PORT_SELECTED 0x100
70#define AD_PORT_MOVED 0x200
71
72// Port Key definitions
73// key is determined according to the link speed, duplex and
74// user key(which is yet not supported)
75// ------------------------------------------------------------
76// Port key : | User key | Speed |Duplex|
77// ------------------------------------------------------------
78// 16 6 1 0
79#define AD_DUPLEX_KEY_BITS 0x1
80#define AD_SPEED_KEY_BITS 0x3E
81#define AD_USER_KEY_BITS 0xFFC0
82
83//dalloun
84#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
85#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
86#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
87#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
94dbffd5 88#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
1da177e4
LT		 89//endalloun
90
91// compare MAC addresses
92#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
93
94static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}};
95static u16 ad_ticks_per_sec;
96static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
97
1da177e4
LT		 98// ================= main 802.3ad protocol functions ==================
99static int ad_lacpdu_send(struct port *port);
1c3f0b8e 100static int ad_marker_send(struct port *port, struct bond_marker *marker);
1da177e4
LT		 101static void ad_mux_machine(struct port *port);
102static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
103static void ad_tx_machine(struct port *port);
104static void ad_periodic_machine(struct port *port);
105static void ad_port_selection_logic(struct port *port);
106static void ad_agg_selection_logic(struct aggregator *aggregator);
107static void ad_clear_agg(struct aggregator *aggregator);
108static void ad_initialize_agg(struct aggregator *aggregator);
109static void ad_initialize_port(struct port *port, int lacp_fast);
110static void ad_initialize_lacpdu(struct lacpdu *Lacpdu);
111static void ad_enable_collecting_distributing(struct port *port);
112static void ad_disable_collecting_distributing(struct port *port);
1c3f0b8e
MD		 113static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
114static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
1da177e4
LT		 115
116
117/////////////////////////////////////////////////////////////////////////////////
118// ================= api to bonding and kernel code ==================
119/////////////////////////////////////////////////////////////////////////////////
120
121/**
122 * __get_bond_by_port - get the port's bonding struct
123 * @port: the port we're looking at
124 *
125 * Return @port's bonding struct, or %NULL if it can't be found.
126 */
127static inline struct bonding *__get_bond_by_port(struct port *port)
128{
129 if (port->slave == NULL) {
130 return NULL;
131 }
132
133 return bond_get_bond_by_slave(port->slave);
134}
135
136/**
137 * __get_first_port - get the first port in the bond
138 * @bond: the bond we're looking at
139 *
140 * Return the port of the first slave in @bond, or %NULL if it can't be found.
141 */
142static inline struct port *__get_first_port(struct bonding *bond)
143{
144 if (bond->slave_cnt == 0) {
145 return NULL;
146 }
147
148 return &(SLAVE_AD_INFO(bond->first_slave).port);
149}
150
151/**
152 * __get_next_port - get the next port in the bond
153 * @port: the port we're looking at
154 *
155 * Return the port of the slave that is next in line of @port's slave in the
156 * bond, or %NULL if it can't be found.
157 */
158static inline struct port *__get_next_port(struct port *port)
159{
160 struct bonding *bond = __get_bond_by_port(port);
161 struct slave *slave = port->slave;
162
163 // If there's no bond for this port, or this is the last slave
164 if ((bond == NULL) || (slave->next == bond->first_slave)) {
165 return NULL;
166 }
167
168 return &(SLAVE_AD_INFO(slave->next).port);
169}
170
171/**
172 * __get_first_agg - get the first aggregator in the bond
173 * @bond: the bond we're looking at
174 *
175 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
176 * found.
177 */
178static inline struct aggregator *__get_first_agg(struct port *port)
179{
180 struct bonding *bond = __get_bond_by_port(port);
181
182 // If there's no bond for this port, or bond has no slaves
183 if ((bond == NULL) || (bond->slave_cnt == 0)) {
184 return NULL;
185 }
186
187 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
188}
189
190/**
191 * __get_next_agg - get the next aggregator in the bond
192 * @aggregator: the aggregator we're looking at
193 *
194 * Return the aggregator of the slave that is next in line of @aggregator's
195 * slave in the bond, or %NULL if it can't be found.
196 */
197static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
198{
199 struct slave *slave = aggregator->slave;
200 struct bonding *bond = bond_get_bond_by_slave(slave);
201
202 // If there's no bond for this aggregator, or this is the last slave
203 if ((bond == NULL) || (slave->next == bond->first_slave)) {
204 return NULL;
205 }
206
207 return &(SLAVE_AD_INFO(slave->next).aggregator);
208}
209
fd989c83
JV		 210/*
211 * __agg_has_partner
212 *
213 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
214 * address for the partner). Return 0 if not.
215 */
216static inline int __agg_has_partner(struct aggregator *agg)
217{
218 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
219}
220
1da177e4
LT		 221/**
222 * __disable_port - disable the port's slave
223 * @port: the port we're looking at
224 *
225 */
226static inline void __disable_port(struct port *port)
227{
228 bond_set_slave_inactive_flags(port->slave);
229}
230
231/**
232 * __enable_port - enable the port's slave, if it's up
233 * @port: the port we're looking at
234 *
235 */
236static inline void __enable_port(struct port *port)
237{
238 struct slave *slave = port->slave;
239
240 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) {
241 bond_set_slave_active_flags(slave);
242 }
243}
244
245/**
246 * __port_is_enabled - check if the port's slave is in active state
247 * @port: the port we're looking at
248 *
249 */
250static inline int __port_is_enabled(struct port *port)
251{
252 return(port->slave->state == BOND_STATE_ACTIVE);
253}
254
255/**
256 * __get_agg_selection_mode - get the aggregator selection mode
257 * @port: the port we're looking at
258 *
fd989c83 259 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 260 */
261static inline u32 __get_agg_selection_mode(struct port *port)
262{
263 struct bonding *bond = __get_bond_by_port(port);
264
265 if (bond == NULL) {
fd989c83 266 return BOND_AD_STABLE;
1da177e4
LT		 267 }
268
269 return BOND_AD_INFO(bond).agg_select_mode;
270}
271
272/**
273 * __check_agg_selection_timer - check if the selection timer has expired
274 * @port: the port we're looking at
275 *
276 */
277static inline int __check_agg_selection_timer(struct port *port)
278{
279 struct bonding *bond = __get_bond_by_port(port);
280
281 if (bond == NULL) {
282 return 0;
283 }
284
285 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
286}
287
288/**
289 * __get_rx_machine_lock - lock the port's RX machine
290 * @port: the port we're looking at
291 *
292 */
293static inline void __get_rx_machine_lock(struct port *port)
294{
2bf86b7a 295 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
1da177e4
LT		 296}
297
298/**
299 * __release_rx_machine_lock - unlock the port's RX machine
300 * @port: the port we're looking at
301 *
302 */
303static inline void __release_rx_machine_lock(struct port *port)
304{
2bf86b7a 305 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
1da177e4
LT		 306}
307
308/**
309 * __get_link_speed - get a port's speed
310 * @port: the port we're looking at
311 *
312 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
313 * 0,
314 * %AD_LINK_SPEED_BITMASK_10MBPS,
315 * %AD_LINK_SPEED_BITMASK_100MBPS,
94dbffd5
JV		 316 * %AD_LINK_SPEED_BITMASK_1000MBPS,
317 * %AD_LINK_SPEED_BITMASK_10000MBPS
1da177e4
LT		 318 */
319static u16 __get_link_speed(struct port *port)
320{
321 struct slave *slave = port->slave;
322 u16 speed;
323
324 /* this if covers only a special case: when the configuration starts with
325 * link down, it sets the speed to 0.
326 * This is done in spite of the fact that the e100 driver reports 0 to be
327 * compatible with MVT in the future.*/
328 if (slave->link != BOND_LINK_UP) {
329 speed=0;
330 } else {
331 switch (slave->speed) {
332 case SPEED_10:
333 speed = AD_LINK_SPEED_BITMASK_10MBPS;
334 break;
335
336 case SPEED_100:
337 speed = AD_LINK_SPEED_BITMASK_100MBPS;
338 break;
339
340 case SPEED_1000:
341 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
342 break;
343
94dbffd5
JV		 344 case SPEED_10000:
345 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
346 break;
347
1da177e4
LT		 348 default:
349 speed = 0; // unknown speed value from ethtool. shouldn't happen
350 break;
351 }
352 }
353
5a03cdb7 354 pr_debug("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed);
1da177e4
LT		 355 return speed;
356}
357
358/**
359 * __get_duplex - get a port's duplex
360 * @port: the port we're looking at
361 *
362 * Return @port's duplex in 802.3ad bitmask format. i.e.:
363 * 0x01 if in full duplex
364 * 0x00 otherwise
365 */
366static u8 __get_duplex(struct port *port)
367{
368 struct slave *slave = port->slave;
369
370 u8 retval;
371
372 // handling a special case: when the configuration starts with
373 // link down, it sets the duplex to 0.
374 if (slave->link != BOND_LINK_UP) {
375 retval=0x0;
376 } else {
377 switch (slave->duplex) {
378 case DUPLEX_FULL:
379 retval=0x1;
5a03cdb7 380 pr_debug("Port %d Received status full duplex update from adapter\n", port->actor_port_number);
1da177e4
LT		 381 break;
382 case DUPLEX_HALF:
383 default:
384 retval=0x0;
5a03cdb7 385 pr_debug("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number);
1da177e4
LT		 386 break;
387 }
388 }
389 return retval;
390}
391
392/**
393 * __initialize_port_locks - initialize a port's RX machine spinlock
394 * @port: the port we're looking at
395 *
396 */
397static inline void __initialize_port_locks(struct port *port)
398{
399 // make sure it isn't called twice
400 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
401}
402
403//conversions
1da177e4
LT		 404
405/**
406 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
407 * @timer_type: which timer to operate
408 * @par: timer parameter. see below
409 *
410 * If @timer_type is %current_while_timer, @par indicates long/short timer.
411 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
412 * %SLOW_PERIODIC_TIME.
413 */
414static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
415{
416 u16 retval=0; //to silence the compiler
417
418 switch (timer_type) {
419 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
420 if (par) { // for short or long timeout
421 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
422 } else {
423 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
424 }
425 break;
426 case AD_ACTOR_CHURN_TIMER: // for local churn machine
427 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
428 break;
429 case AD_PERIODIC_TIMER: // for periodic machine
430 retval = (par*ad_ticks_per_sec); // long timeout
431 break;
432 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
433 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
434 break;
435 case AD_WAIT_WHILE_TIMER: // for selection machine
436 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
437 break;
438 }
439 return retval;
440}
441
442
443/////////////////////////////////////////////////////////////////////////////////
444// ================= ad_rx_machine helper functions ==================
445/////////////////////////////////////////////////////////////////////////////////
446
447/**
448 * __record_pdu - record parameters from a received lacpdu
449 * @lacpdu: the lacpdu we've received
450 * @port: the port we're looking at
451 *
452 * Record the parameter values for the Actor carried in a received lacpdu as
453 * the current partner operational parameter values and sets
454 * actor_oper_port_state.defaulted to FALSE.
455 */
456static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
457{
1da177e4 458 if (lacpdu && port) {
b99d6ba9
HE		 459 struct port_params *partner = &port->partner_oper;
460
1da177e4 461 // record the new parameter values for the partner operational
b99d6ba9
HE		 462 partner->port_number = ntohs(lacpdu->actor_port);
463 partner->port_priority = ntohs(lacpdu->actor_port_priority);
464 partner->system = lacpdu->actor_system;
465 partner->system_priority = ntohs(lacpdu->actor_system_priority);
466 partner->key = ntohs(lacpdu->actor_key);
467 partner->port_state = lacpdu->actor_state;
1da177e4
LT		 468
469 // set actor_oper_port_state.defaulted to FALSE
470 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
471
472 // set the partner sync. to on if the partner is sync. and the port is matched
473 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
b99d6ba9 474 partner->port_state |= AD_STATE_SYNCHRONIZATION;
1da177e4 475 } else {
b99d6ba9 476 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 477 }
478 }
479}
480
481/**
482 * __record_default - record default parameters
483 * @port: the port we're looking at
484 *
485 * This function records the default parameter values for the partner carried
486 * in the Partner Admin parameters as the current partner operational parameter
487 * values and sets actor_oper_port_state.defaulted to TRUE.
488 */
489static void __record_default(struct port *port)
490{
1da177e4
LT		 491 if (port) {
492 // record the partner admin parameters
5eefd1ad
HE		 493 memcpy(&port->partner_oper, &port->partner_admin,
494 sizeof(struct port_params));
1da177e4
LT		 495
496 // set actor_oper_port_state.defaulted to true
497 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
498 }
499}
500
501/**
502 * __update_selected - update a port's Selected variable from a received lacpdu
503 * @lacpdu: the lacpdu we've received
504 * @port: the port we're looking at
505 *
506 * Update the value of the selected variable, using parameter values from a
507 * newly received lacpdu. The parameter values for the Actor carried in the
508 * received PDU are compared with the corresponding operational parameter
509 * values for the ports partner. If one or more of the comparisons shows that
510 * the value(s) received in the PDU differ from the current operational values,
511 * then selected is set to FALSE and actor_oper_port_state.synchronization is
512 * set to out_of_sync. Otherwise, selected remains unchanged.
513 */
514static void __update_selected(struct lacpdu *lacpdu, struct port *port)
515{
1da177e4 516 if (lacpdu && port) {
ce6a49ad
HE		 517 const struct port_params *partner = &port->partner_oper;
518
1da177e4 519 // check if any parameter is different
ce6a49ad
HE		 520 if (ntohs(lacpdu->actor_port) != partner->port_number
521 || ntohs(lacpdu->actor_port_priority) != partner->port_priority
522 || MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system)
523 || ntohs(lacpdu->actor_system_priority) != partner->system_priority
524 || ntohs(lacpdu->actor_key) != partner->key
525 || (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 526 // update the state machine Selected variable
527 port->sm_vars &= ~AD_PORT_SELECTED;
528 }
529 }
530}
531
532/**
533 * __update_default_selected - update a port's Selected variable from Partner
534 * @port: the port we're looking at
535 *
536 * This function updates the value of the selected variable, using the partner
537 * administrative parameter values. The administrative values are compared with
538 * the corresponding operational parameter values for the partner. If one or
539 * more of the comparisons shows that the administrative value(s) differ from
540 * the current operational values, then Selected is set to FALSE and
541 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
542 * Selected remains unchanged.
543 */
544static void __update_default_selected(struct port *port)
545{
546 // validate the port
547 if (port) {
548 // check if any parameter is different
1055c9ab
HE		 549 if ((port->partner_admin.port_number != port->partner_oper.port_number) ||
550 (port->partner_admin.port_priority != port->partner_oper.port_priority) ||
551 MAC_ADDRESS_COMPARE(&(port->partner_admin.system), &(port->partner_oper.system)) ||
552 (port->partner_admin.system_priority != port->partner_oper.system_priority) ||
553 (port->partner_admin.key != port->partner_oper.key) ||
554 ((port->partner_admin.port_state & AD_STATE_AGGREGATION) != (port->partner_oper.port_state & AD_STATE_AGGREGATION))
1da177e4
LT		 555 ) {
556 // update the state machine Selected variable
557 port->sm_vars &= ~AD_PORT_SELECTED;
558 }
559 }
560}
561
562/**
563 * __choose_matched - update a port's matched variable from a received lacpdu
564 * @lacpdu: the lacpdu we've received
565 * @port: the port we're looking at
566 *
567 * Update the value of the matched variable, using parameter values from a
568 * newly received lacpdu. Parameter values for the partner carried in the
569 * received PDU are compared with the corresponding operational parameter
570 * values for the actor. Matched is set to TRUE if all of these parameters
571 * match and the PDU parameter partner_state.aggregation has the same value as
572 * actor_oper_port_state.aggregation and lacp will actively maintain the link
573 * in the aggregation. Matched is also set to TRUE if the value of
574 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
575 * an individual link and lacp will actively maintain the link. Otherwise,
576 * matched is set to FALSE. LACP is considered to be actively maintaining the
577 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
578 * the actor's actor_oper_port_state.lacp_activity and the PDU's
579 * partner_state.lacp_activity variables are TRUE.
580 */
581static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
582{
583 // validate lacpdu and port
584 if (lacpdu && port) {
585 // check if all parameters are alike
89cc76f9
JV		 586 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
587 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
1da177e4 588 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
89cc76f9
JV		 589 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
590 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
1da177e4
LT		 591 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
592 // or this is individual link(aggregation == FALSE)
593 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
594 ) {
595 // update the state machine Matched variable
596 port->sm_vars |= AD_PORT_MATCHED;
597 } else {
598 port->sm_vars &= ~AD_PORT_MATCHED;
599 }
600 }
601}
602
603/**
604 * __update_ntt - update a port's ntt variable from a received lacpdu
605 * @lacpdu: the lacpdu we've received
606 * @port: the port we're looking at
607 *
608 * Updates the value of the ntt variable, using parameter values from a newly
609 * received lacpdu. The parameter values for the partner carried in the
610 * received PDU are compared with the corresponding operational parameter
611 * values for the Actor. If one or more of the comparisons shows that the
612 * value(s) received in the PDU differ from the current operational values,
613 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
614 */
615static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
616{
617 // validate lacpdu and port
618 if (lacpdu && port) {
619 // check if any parameter is different
89cc76f9
JV		 620 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
621 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
1da177e4 622 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 623 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
624 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 625 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
626 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
627 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
628 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
629 ) {
630 // set ntt to be TRUE
631 port->ntt = 1;
632 }
633 }
634}
635
636/**
637 * __attach_bond_to_agg
638 * @port: the port we're looking at
639 *
640 * Handle the attaching of the port's control parser/multiplexer and the
641 * aggregator. This function does nothing since the parser/multiplexer of the
642 * receive and the parser/multiplexer of the aggregator are already combined.
643 */
644static void __attach_bond_to_agg(struct port *port)
645{
646 port=NULL; // just to satisfy the compiler
647 // This function does nothing since the parser/multiplexer of the receive
648 // and the parser/multiplexer of the aggregator are already combined
649}
650
651/**
652 * __detach_bond_from_agg
653 * @port: the port we're looking at
654 *
655 * Handle the detaching of the port's control parser/multiplexer from the
656 * aggregator. This function does nothing since the parser/multiplexer of the
657 * receive and the parser/multiplexer of the aggregator are already combined.
658 */
659static void __detach_bond_from_agg(struct port *port)
660{
661 port=NULL; // just to satisfy the compiler
662 // This function does nothing sience the parser/multiplexer of the receive
663 // and the parser/multiplexer of the aggregator are already combined
664}
665
666/**
667 * __agg_ports_are_ready - check if all ports in an aggregator are ready
668 * @aggregator: the aggregator we're looking at
669 *
670 */
671static int __agg_ports_are_ready(struct aggregator *aggregator)
672{
673 struct port *port;
674 int retval = 1;
675
676 if (aggregator) {
677 // scan all ports in this aggregator to verfy if they are all ready
678 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
679 if (!(port->sm_vars & AD_PORT_READY_N)) {
680 retval = 0;
681 break;
682 }
683 }
684 }
685
686 return retval;
687}
688
689/**
690 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
691 * @aggregator: the aggregator we're looking at
692 * @val: Should the ports' ready bit be set on or off
693 *
694 */
695static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
696{
697 struct port *port;
698
699 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
700 if (val) {
701 port->sm_vars |= AD_PORT_READY;
702 } else {
703 port->sm_vars &= ~AD_PORT_READY;
704 }
705 }
706}
707
708/**
709 * __get_agg_bandwidth - get the total bandwidth of an aggregator
710 * @aggregator: the aggregator we're looking at
711 *
712 */
713static u32 __get_agg_bandwidth(struct aggregator *aggregator)
714{
715 u32 bandwidth=0;
716 u32 basic_speed;
717
718 if (aggregator->num_of_ports) {
719 basic_speed = __get_link_speed(aggregator->lag_ports);
720 switch (basic_speed) {
721 case AD_LINK_SPEED_BITMASK_1MBPS:
722 bandwidth = aggregator->num_of_ports;
723 break;
724 case AD_LINK_SPEED_BITMASK_10MBPS:
725 bandwidth = aggregator->num_of_ports * 10;
726 break;
727 case AD_LINK_SPEED_BITMASK_100MBPS:
728 bandwidth = aggregator->num_of_ports * 100;
729 break;
730 case AD_LINK_SPEED_BITMASK_1000MBPS:
731 bandwidth = aggregator->num_of_ports * 1000;
732 break;
94dbffd5
JV		 733 case AD_LINK_SPEED_BITMASK_10000MBPS:
734 bandwidth = aggregator->num_of_ports * 10000;
735 break;
1da177e4
LT		 736 default:
737 bandwidth=0; // to silent the compilor ....
738 }
739 }
740 return bandwidth;
741}
742
743/**
744 * __get_active_agg - get the current active aggregator
745 * @aggregator: the aggregator we're looking at
746 *
747 */
748static struct aggregator *__get_active_agg(struct aggregator *aggregator)
749{
750 struct aggregator *retval = NULL;
751
752 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
753 if (aggregator->is_active) {
754 retval = aggregator;
755 break;
756 }
757 }
758
759 return retval;
760}
761
762/**
763 * __update_lacpdu_from_port - update a port's lacpdu fields
764 * @port: the port we're looking at
765 *
766 */
767static inline void __update_lacpdu_from_port(struct port *port)
768{
769 struct lacpdu *lacpdu = &port->lacpdu;
770
771 /* update current actual Actor parameters */
772 /* lacpdu->subtype initialized
773 * lacpdu->version_number initialized
774 * lacpdu->tlv_type_actor_info initialized
775 * lacpdu->actor_information_length initialized
776 */
777
d3bb52b0 778 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 779 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 780 lacpdu->actor_key = htons(port->actor_oper_port_key);
781 lacpdu->actor_port_priority = htons(port->actor_port_priority);
782 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4
LT		 783 lacpdu->actor_state = port->actor_oper_port_state;
784
785 /* lacpdu->reserved_3_1 initialized
786 * lacpdu->tlv_type_partner_info initialized
787 * lacpdu->partner_information_length initialized
788 */
789
1055c9ab
HE		 790 lacpdu->partner_system_priority = htons(port->partner_oper.system_priority);
791 lacpdu->partner_system = port->partner_oper.system;
792 lacpdu->partner_key = htons(port->partner_oper.key);
793 lacpdu->partner_port_priority = htons(port->partner_oper.port_priority);
794 lacpdu->partner_port = htons(port->partner_oper.port_number);
795 lacpdu->partner_state = port->partner_oper.port_state;
1da177e4
LT		 796
797 /* lacpdu->reserved_3_2 initialized
798 * lacpdu->tlv_type_collector_info initialized
799 * lacpdu->collector_information_length initialized
800 * collector_max_delay initialized
801 * reserved_12[12] initialized
802 * tlv_type_terminator initialized
803 * terminator_length initialized
804 * reserved_50[50] initialized
805 */
1da177e4
LT		 806}
807
808//////////////////////////////////////////////////////////////////////////////////////
809// ================= main 802.3ad protocol code ======================================
810//////////////////////////////////////////////////////////////////////////////////////
811
812/**
813 * ad_lacpdu_send - send out a lacpdu packet on a given port
814 * @port: the port we're looking at
815 *
816 * Returns: 0 on success
817 * < 0 on error
818 */
819static int ad_lacpdu_send(struct port *port)
820{
821 struct slave *slave = port->slave;
822 struct sk_buff *skb;
823 struct lacpdu_header *lacpdu_header;
824 int length = sizeof(struct lacpdu_header);
825 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
826
827 skb = dev_alloc_skb(length);
828 if (!skb) {
829 return -ENOMEM;
830 }
831
832 skb->dev = slave->dev;
459a98ed 833 skb_reset_mac_header(skb);
b0e380b1 834 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 835 skb->protocol = PKT_TYPE_LACPDU;
836 skb->priority = TC_PRIO_CONTROL;
837
838 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
839
840 lacpdu_header->ad_header.destination_address = lacpdu_multicast_address;
841 /* Note: source addres is set to be the member's PERMANENT address, because we use it
842 to identify loopback lacpdus in receive. */
843 lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
844 lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU;
845
846 lacpdu_header->lacpdu = port->lacpdu; // struct copy
847
848 dev_queue_xmit(skb);
849
850 return 0;
851}
852
853/**
854 * ad_marker_send - send marker information/response on a given port
855 * @port: the port we're looking at
856 * @marker: marker data to send
857 *
858 * Returns: 0 on success
859 * < 0 on error
860 */
1c3f0b8e 861static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 862{
863 struct slave *slave = port->slave;
864 struct sk_buff *skb;
1c3f0b8e
MD		 865 struct bond_marker_header *marker_header;
866 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 867 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
868
869 skb = dev_alloc_skb(length + 16);
870 if (!skb) {
871 return -ENOMEM;
872 }
873
874 skb_reserve(skb, 16);
875
876 skb->dev = slave->dev;
459a98ed 877 skb_reset_mac_header(skb);
b0e380b1 878 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 879 skb->protocol = PKT_TYPE_LACPDU;
880
1c3f0b8e 881 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4
LT		 882
883 marker_header->ad_header.destination_address = lacpdu_multicast_address;
884 /* Note: source addres is set to be the member's PERMANENT address, because we use it
885 to identify loopback MARKERs in receive. */
886 marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
887 marker_header->ad_header.length_type = PKT_TYPE_LACPDU;
888
889 marker_header->marker = *marker; // struct copy
890
891 dev_queue_xmit(skb);
892
893 return 0;
894}
895
896/**
897 * ad_mux_machine - handle a port's mux state machine
898 * @port: the port we're looking at
899 *
900 */
901static void ad_mux_machine(struct port *port)
902{
903 mux_states_t last_state;
904
905 // keep current State Machine state to compare later if it was changed
906 last_state = port->sm_mux_state;
907
908 if (port->sm_vars & AD_PORT_BEGIN) {
909 port->sm_mux_state = AD_MUX_DETACHED; // next state
910 } else {
911 switch (port->sm_mux_state) {
912 case AD_MUX_DETACHED:
913 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY
914 port->sm_mux_state = AD_MUX_WAITING; // next state
915 }
916 break;
917 case AD_MUX_WAITING:
918 // if SELECTED == FALSE return to DETACH state
919 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
920 port->sm_vars &= ~AD_PORT_READY_N;
921 // in order to withhold the Selection Logic to check all ports READY_N value
922 // every callback cycle to update ready variable, we check READY_N and update READY here
923 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
924 port->sm_mux_state = AD_MUX_DETACHED; // next state
925 break;
926 }
927
928 // check if the wait_while_timer expired
929 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) {
930 port->sm_vars |= AD_PORT_READY_N;
931 }
932
933 // in order to withhold the selection logic to check all ports READY_N value
934 // every callback cycle to update ready variable, we check READY_N and update READY here
935 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
936
937 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
938 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) {
939 port->sm_mux_state = AD_MUX_ATTACHED; // next state
940 }
941 break;
942 case AD_MUX_ATTACHED:
943 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
1055c9ab 944 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
1da177e4
LT		 945 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
946 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
947 port->sm_vars &= ~AD_PORT_READY_N;
948 // in order to withhold the selection logic to check all ports READY_N value
949 // every callback cycle to update ready variable, we check READY_N and update READY here
950 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
951 port->sm_mux_state = AD_MUX_DETACHED;// next state
952 }
953 break;
954 case AD_MUX_COLLECTING_DISTRIBUTING:
955 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
1055c9ab 956 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
1da177e4
LT		 957 ) {
958 port->sm_mux_state = AD_MUX_ATTACHED;// next state
959
960 } else {
961 // if port state hasn't changed make
962 // sure that a collecting distributing
963 // port in an active aggregator is enabled
964 if (port->aggregator &&
965 port->aggregator->is_active &&
966 !__port_is_enabled(port)) {
967
968 __enable_port(port);
969 }
970 }
971 break;
972 default: //to silence the compiler
973 break;
974 }
975 }
976
977 // check if the state machine was changed
978 if (port->sm_mux_state != last_state) {
5a03cdb7 979 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state);
1da177e4
LT		 980 switch (port->sm_mux_state) {
981 case AD_MUX_DETACHED:
982 __detach_bond_from_agg(port);
983 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
984 ad_disable_collecting_distributing(port);
985 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
986 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
987 port->ntt = 1;
988 break;
989 case AD_MUX_WAITING:
990 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
991 break;
992 case AD_MUX_ATTACHED:
993 __attach_bond_to_agg(port);
994 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
995 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
996 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
997 ad_disable_collecting_distributing(port);
998 port->ntt = 1;
999 break;
1000 case AD_MUX_COLLECTING_DISTRIBUTING:
1001 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1002 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1003 ad_enable_collecting_distributing(port);
1004 port->ntt = 1;
1005 break;
1006 default: //to silence the compiler
1007 break;
1008 }
1009 }
1010}
1011
1012/**
1013 * ad_rx_machine - handle a port's rx State Machine
1014 * @lacpdu: the lacpdu we've received
1015 * @port: the port we're looking at
1016 *
1017 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1018 * CURRENT. If timer expired set the state machine in the proper state.
1019 * In other cases, this function checks if we need to switch to other state.
1020 */
1021static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1022{
1023 rx_states_t last_state;
1024
1025 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1026 __get_rx_machine_lock(port);
1027
1028 // keep current State Machine state to compare later if it was changed
1029 last_state = port->sm_rx_state;
1030
1031 // check if state machine should change state
1032 // first, check if port was reinitialized
1033 if (port->sm_vars & AD_PORT_BEGIN) {
1034 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1035 }
1036 // check if port is not enabled
1037 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) {
1038 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1039 }
1040 // check if new lacpdu arrived
1041 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1042 port->sm_rx_timer_counter = 0; // zero timer
1043 port->sm_rx_state = AD_RX_CURRENT;
1044 } else {
1045 // if timer is on, and if it is expired
1046 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1047 switch (port->sm_rx_state) {
1048 case AD_RX_EXPIRED:
1049 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1050 break;
1051 case AD_RX_CURRENT:
1052 port->sm_rx_state = AD_RX_EXPIRED; // next state
1053 break;
1054 default: //to silence the compiler
1055 break;
1056 }
1057 } else {
1058 // if no lacpdu arrived and no timer is on
1059 switch (port->sm_rx_state) {
1060 case AD_RX_PORT_DISABLED:
1061 if (port->sm_vars & AD_PORT_MOVED) {
1062 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1063 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1064 port->sm_rx_state = AD_RX_EXPIRED; // next state
1065 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) {
1066 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1067 }
1068 break;
1069 default: //to silence the compiler
1070 break;
1071
1072 }
1073 }
1074 }
1075
1076 // check if the State machine was changed or new lacpdu arrived
1077 if ((port->sm_rx_state != last_state) || (lacpdu)) {
5a03cdb7 1078 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state);
1da177e4
LT		 1079 switch (port->sm_rx_state) {
1080 case AD_RX_INITIALIZE:
1081 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1082 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1083 } else {
1084 port->sm_vars |= AD_PORT_LACP_ENABLED;
1085 }
1086 port->sm_vars &= ~AD_PORT_SELECTED;
1087 __record_default(port);
1088 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1089 port->sm_vars &= ~AD_PORT_MOVED;
1090 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1091
1092 /*- Fall Through -*/
1093
1094 case AD_RX_PORT_DISABLED:
1095 port->sm_vars &= ~AD_PORT_MATCHED;
1096 break;
1097 case AD_RX_LACP_DISABLED:
1098 port->sm_vars &= ~AD_PORT_SELECTED;
1099 __record_default(port);
1055c9ab 1100 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1101 port->sm_vars |= AD_PORT_MATCHED;
1102 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1103 break;
1104 case AD_RX_EXPIRED:
1105 //Reset of the Synchronization flag. (Standard 43.4.12)
1106 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1107 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1055c9ab 1108 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1109 port->sm_vars &= ~AD_PORT_MATCHED;
1055c9ab 1110 port->partner_oper.port_state |= AD_SHORT_TIMEOUT;
1da177e4
LT		 1111 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1112 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1113 break;
1114 case AD_RX_DEFAULTED:
1115 __update_default_selected(port);
1116 __record_default(port);
1117 port->sm_vars |= AD_PORT_MATCHED;
1118 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1119 break;
1120 case AD_RX_CURRENT:
1121 // detect loopback situation
1122 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1123 // INFO_RECEIVED_LOOPBACK_FRAMES
4e0952c7
MW		 1124 printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on "
1125 "adapter (%s). Check the configuration to verify that all "
1126 "Adapters are connected to 802.3ad compliant switch ports\n",
1127 port->slave->dev->master->name, port->slave->dev->name);
1da177e4
LT		 1128 __release_rx_machine_lock(port);
1129 return;
1130 }
1131 __update_selected(lacpdu, port);
1132 __update_ntt(lacpdu, port);
1133 __record_pdu(lacpdu, port);
1134 __choose_matched(lacpdu, port);
1135 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1136 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1137 // verify that if the aggregator is enabled, the port is enabled too.
1138 //(because if the link goes down for a short time, the 802.3ad will not
1139 // catch it, and the port will continue to be disabled)
1140 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) {
1141 __enable_port(port);
1142 }
1143 break;
1144 default: //to silence the compiler
1145 break;
1146 }
1147 }
1148 __release_rx_machine_lock(port);
1149}
1150
1151/**
1152 * ad_tx_machine - handle a port's tx state machine
1153 * @port: the port we're looking at
1154 *
1155 */
1156static void ad_tx_machine(struct port *port)
1157{
1158 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1159 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1160 // check if there is something to send
1161 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1162 __update_lacpdu_from_port(port);
1163 // send the lacpdu
1164 if (ad_lacpdu_send(port) >= 0) {
5a03cdb7 1165 pr_debug("Sent LACPDU on port %d\n", port->actor_port_number);
1da177e4
LT		 1166 // mark ntt as false, so it will not be sent again until demanded
1167 port->ntt = 0;
1168 }
1169 }
1170 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1171 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1172 }
1173}
1174
1175/**
1176 * ad_periodic_machine - handle a port's periodic state machine
1177 * @port: the port we're looking at
1178 *
1179 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1180 */
1181static void ad_periodic_machine(struct port *port)
1182{
1183 periodic_states_t last_state;
1184
1185 // keep current state machine state to compare later if it was changed
1186 last_state = port->sm_periodic_state;
1187
1188 // check if port was reinitialized
1189 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1190 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4
LT		 1191 ) {
1192 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1193 }
1194 // check if state machine should change state
1195 else if (port->sm_periodic_timer_counter) {
1196 // check if periodic state machine expired
1197 if (!(--port->sm_periodic_timer_counter)) {
1198 // if expired then do tx
1199 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1200 } else {
1201 // If not expired, check if there is some new timeout parameter from the partner state
1202 switch (port->sm_periodic_state) {
1203 case AD_FAST_PERIODIC:
1055c9ab 1204 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4
LT		 1205 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1206 }
1207 break;
1208 case AD_SLOW_PERIODIC:
1055c9ab 1209 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4
LT		 1210 // stop current timer
1211 port->sm_periodic_timer_counter = 0;
1212 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1213 }
1214 break;
1215 default: //to silence the compiler
1216 break;
1217 }
1218 }
1219 } else {
1220 switch (port->sm_periodic_state) {
1221 case AD_NO_PERIODIC:
1222 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1223 break;
1224 case AD_PERIODIC_TX:
1055c9ab 1225 if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4
LT		 1226 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1227 } else {
1228 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1229 }
1230 break;
1231 default: //to silence the compiler
1232 break;
1233 }
1234 }
1235
1236 // check if the state machine was changed
1237 if (port->sm_periodic_state != last_state) {
5a03cdb7 1238 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state);
1da177e4
LT		 1239 switch (port->sm_periodic_state) {
1240 case AD_NO_PERIODIC:
1241 port->sm_periodic_timer_counter = 0; // zero timer
1242 break;
1243 case AD_FAST_PERIODIC:
1244 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1245 break;
1246 case AD_SLOW_PERIODIC:
1247 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1248 break;
1249 case AD_PERIODIC_TX:
1250 port->ntt = 1;
1251 break;
1252 default: //to silence the compiler
1253 break;
1254 }
1255 }
1256}
1257
1258/**
1259 * ad_port_selection_logic - select aggregation groups
1260 * @port: the port we're looking at
1261 *
1262 * Select aggregation groups, and assign each port for it's aggregetor. The
1263 * selection logic is called in the inititalization (after all the handshkes),
1264 * and after every lacpdu receive (if selected is off).
1265 */
1266static void ad_port_selection_logic(struct port *port)
1267{
1268 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1269 struct port *last_port = NULL, *curr_port;
1270 int found = 0;
1271
1272 // if the port is already Selected, do nothing
1273 if (port->sm_vars & AD_PORT_SELECTED) {
1274 return;
1275 }
1276
1277 // if the port is connected to other aggregator, detach it
1278 if (port->aggregator) {
1279 // detach the port from its former aggregator
1280 temp_aggregator=port->aggregator;
1281 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) {
1282 if (curr_port == port) {
1283 temp_aggregator->num_of_ports--;
1284 if (!last_port) {// if it is the first port attached to the aggregator
1285 temp_aggregator->lag_ports=port->next_port_in_aggregator;
1286 } else {// not the first port attached to the aggregator
1287 last_port->next_port_in_aggregator=port->next_port_in_aggregator;
1288 }
1289
1290 // clear the port's relations to this aggregator
1291 port->aggregator = NULL;
1292 port->next_port_in_aggregator=NULL;
1293 port->actor_port_aggregator_identifier=0;
1294
5a03cdb7 1295 pr_debug("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier);
1da177e4
LT		 1296 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1297 if (!temp_aggregator->lag_ports) {
1298 ad_clear_agg(temp_aggregator);
1299 }
1300 break;
1301 }
1302 }
1303 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
4e0952c7 1304 printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was "
1da177e4 1305 "related to aggregator %d but was not on its port list\n",
4e0952c7 1306 port->slave->dev->master->name,
1da177e4
LT		 1307 port->actor_port_number, port->slave->dev->name,
1308 port->aggregator->aggregator_identifier);
1309 }
1310 }
1311 // search on all aggregators for a suitable aggregator for this port
1312 for (aggregator = __get_first_agg(port); aggregator;
1313 aggregator = __get_next_agg(aggregator)) {
1314
1315 // keep a free aggregator for later use(if needed)
1316 if (!aggregator->lag_ports) {
1317 if (!free_aggregator) {
1318 free_aggregator=aggregator;
1319 }
1320 continue;
1321 }
1322 // check if current aggregator suits us
1323 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1055c9ab
HE		 1324 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1325 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1326 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1327 ) &&
1055c9ab 1328 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1da177e4
LT		 1329 !aggregator->is_individual) // but is not individual OR
1330 )
1331 ) {
1332 // attach to the founded aggregator
1333 port->aggregator = aggregator;
1334 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1335 port->next_port_in_aggregator=aggregator->lag_ports;
1336 port->aggregator->num_of_ports++;
1337 aggregator->lag_ports=port;
5a03cdb7 1338 pr_debug("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4
LT		 1339
1340 // mark this port as selected
1341 port->sm_vars |= AD_PORT_SELECTED;
1342 found = 1;
1343 break;
1344 }
1345 }
1346
1347 // the port couldn't find an aggregator - attach it to a new aggregator
1348 if (!found) {
1349 if (free_aggregator) {
1350 // assign port a new aggregator
1351 port->aggregator = free_aggregator;
1352 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1353
1354 // update the new aggregator's parameters
1355 // if port was responsed from the end-user
1356 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex
1357 port->aggregator->is_individual = 0;
1358 } else {
1359 port->aggregator->is_individual = 1;
1360 }
1361
1362 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1363 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1055c9ab
HE		 1364 port->aggregator->partner_system=port->partner_oper.system;
1365 port->aggregator->partner_system_priority = port->partner_oper.system_priority;
1366 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1367 port->aggregator->receive_state = 1;
1368 port->aggregator->transmit_state = 1;
1369 port->aggregator->lag_ports = port;
1370 port->aggregator->num_of_ports++;
1371
1372 // mark this port as selected
1373 port->sm_vars |= AD_PORT_SELECTED;
1374
5a03cdb7 1375 pr_debug("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4 1376 } else {
4e0952c7
MW		 1377 printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n",
1378 port->slave->dev->master->name,
1da177e4
LT		 1379 port->actor_port_number, port->slave->dev->name);
1380 }
1381 }
1382 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1383 // else set ready=FALSE in all aggregator's ports
1384 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1385
fd989c83
JV		 1386 aggregator = __get_first_agg(port);
1387 ad_agg_selection_logic(aggregator);
1388}
1389
1390/*
1391 * Decide if "agg" is a better choice for the new active aggregator that
1392 * the current best, according to the ad_select policy.
1393 */
1394static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1395 struct aggregator *curr)
1396{
1397 /*
1398 * 0. If no best, select current.
1399 *
1400 * 1. If the current agg is not individual, and the best is
1401 * individual, select current.
1402 *
1403 * 2. If current agg is individual and the best is not, keep best.
1404 *
1405 * 3. Therefore, current and best are both individual or both not
1406 * individual, so:
1407 *
1408 * 3a. If current agg partner replied, and best agg partner did not,
1409 * select current.
1410 *
1411 * 3b. If current agg partner did not reply and best agg partner
1412 * did reply, keep best.
1413 *
1414 * 4. Therefore, current and best both have partner replies or
1415 * both do not, so perform selection policy:
1416 *
1417 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1418 * select by bandwidth.
1419 *
1420 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1421 */
1422 if (!best)
1423 return curr;
1424
1425 if (!curr->is_individual && best->is_individual)
1426 return curr;
1427
1428 if (curr->is_individual && !best->is_individual)
1429 return best;
1430
1431 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1432 return curr;
1433
1434 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1435 return best;
1436
1437 switch (__get_agg_selection_mode(curr->lag_ports)) {
1438 case BOND_AD_COUNT:
1439 if (curr->num_of_ports > best->num_of_ports)
1440 return curr;
1441
1442 if (curr->num_of_ports < best->num_of_ports)
1443 return best;
1444
1445 /*FALLTHROUGH*/
1446 case BOND_AD_STABLE:
1447 case BOND_AD_BANDWIDTH:
1448 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1449 return curr;
1450
1451 break;
1452
1453 default:
1454 printk(KERN_WARNING DRV_NAME
1455 ": %s: Impossible agg select mode %d\n",
1456 curr->slave->dev->master->name,
1457 __get_agg_selection_mode(curr->lag_ports));
1458 break;
1da177e4 1459 }
fd989c83
JV		 1460
1461 return best;
1da177e4
LT		 1462}
1463
1464/**
1465 * ad_agg_selection_logic - select an aggregation group for a team
1466 * @aggregator: the aggregator we're looking at
1467 *
1468 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1469 *
1470 * The logic of this function is to select the aggregator according to
1471 * the ad_select policy:
1472 *
1473 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1474 * it, and to reselect the active aggregator only if the previous
1475 * aggregator has no more ports related to it.
1476 *
1477 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1478 * bandwidth, and reselect whenever a link state change takes place or the
1479 * set of slaves in the bond changes.
1480 *
1481 * BOND_AD_COUNT: select the aggregator with largest number of ports
1482 * (slaves), and reselect whenever a link state change takes place or the
1483 * set of slaves in the bond changes.
1da177e4
LT		 1484 *
1485 * FIXME: this function MUST be called with the first agg in the bond, or
1486 * __get_active_agg() won't work correctly. This function should be better
1487 * called with the bond itself, and retrieve the first agg from it.
1488 */
fd989c83 1489static void ad_agg_selection_logic(struct aggregator *agg)
1da177e4 1490{
fd989c83 1491 struct aggregator *best, *active, *origin;
1da177e4 1492 struct port *port;
1da177e4 1493
fd989c83 1494 origin = agg;
1da177e4 1495
fd989c83
JV		 1496 active = __get_active_agg(agg);
1497 best = active;
1da177e4 1498
1da177e4 1499 do {
fd989c83
JV		 1500 agg->is_active = 0;
1501
1502 if (agg->num_of_ports)
1503 best = ad_agg_selection_test(best, agg);
1504
1505 } while ((agg = __get_next_agg(agg)));
1506
1507 if (best &&
1508 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1509 /*
1510 * For the STABLE policy, don't replace the old active
1511 * aggregator if it's still active (it has an answering
1512 * partner) or if both the best and active don't have an
1513 * answering partner.
1514 */
1515 if (active && active->lag_ports &&
1516 active->lag_ports->is_enabled &&
1517 (__agg_has_partner(active) ||
1518 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1519 if (!(!active->actor_oper_aggregator_key &&
1520 best->actor_oper_aggregator_key)) {
1521 best = NULL;
1522 active->is_active = 1;
1da177e4
LT		 1523 }
1524 }
fd989c83 1525 }
1da177e4 1526
fd989c83
JV		 1527 if (best && (best == active)) {
1528 best = NULL;
1529 active->is_active = 1;
1da177e4
LT		 1530 }
1531
1532 // if there is new best aggregator, activate it
fd989c83 1533 if (best) {
5a03cdb7 1534 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
fd989c83
JV		 1535 best->aggregator_identifier, best->num_of_ports,
1536 best->actor_oper_aggregator_key,
1537 best->partner_oper_aggregator_key,
1538 best->is_individual, best->is_active);
5a03cdb7 1539 pr_debug("best ports %p slave %p %s\n",
fd989c83
JV		 1540 best->lag_ports, best->slave,
1541 best->slave ? best->slave->dev->name : "NULL");
1542
1543 for (agg = __get_first_agg(best->lag_ports); agg;
1544 agg = __get_next_agg(agg)) {
1545
5a03cdb7 1546 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
fd989c83
JV		 1547 agg->aggregator_identifier, agg->num_of_ports,
1548 agg->actor_oper_aggregator_key,
1549 agg->partner_oper_aggregator_key,
1550 agg->is_individual, agg->is_active);
1da177e4
LT		 1551 }
1552
1553 // check if any partner replys
fd989c83
JV		 1554 if (best->is_individual) {
1555 printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad"
1556 " response from the link partner for any"
1557 " adapters in the bond\n",
1558 best->slave->dev->master->name);
1da177e4
LT		 1559 }
1560
fd989c83 1561 best->is_active = 1;
5a03cdb7 1562 pr_debug("LAG %d chosen as the active LAG\n",
fd989c83 1563 best->aggregator_identifier);
5a03cdb7 1564 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
fd989c83
JV		 1565 best->aggregator_identifier, best->num_of_ports,
1566 best->actor_oper_aggregator_key,
1567 best->partner_oper_aggregator_key,
1568 best->is_individual, best->is_active);
1da177e4
LT		 1569
1570 // disable the ports that were related to the former active_aggregator
fd989c83
JV		 1571 if (active) {
1572 for (port = active->lag_ports; port;
1573 port = port->next_port_in_aggregator) {
1da177e4
LT		 1574 __disable_port(port);
1575 }
1576 }
1577 }
1578
fd989c83
JV		 1579 /*
1580 * if the selected aggregator is of join individuals
1581 * (partner_system is NULL), enable their ports
1582 */
1583 active = __get_active_agg(origin);
1da177e4 1584
fd989c83
JV		 1585 if (active) {
1586 if (!__agg_has_partner(active)) {
1587 for (port = active->lag_ports; port;
1588 port = port->next_port_in_aggregator) {
1da177e4
LT		 1589 __enable_port(port);
1590 }
1591 }
1592 }
fd989c83
JV		 1593
1594 if (origin->slave) {
1595 struct bonding *bond;
1596
1597 bond = bond_get_bond_by_slave(origin->slave);
1598 if (bond)
1599 bond_3ad_set_carrier(bond);
1600 }
1da177e4
LT		 1601}
1602
1603/**
1604 * ad_clear_agg - clear a given aggregator's parameters
1605 * @aggregator: the aggregator we're looking at
1606 *
1607 */
1608static void ad_clear_agg(struct aggregator *aggregator)
1609{
1610 if (aggregator) {
1611 aggregator->is_individual = 0;
1612 aggregator->actor_admin_aggregator_key = 0;
1613 aggregator->actor_oper_aggregator_key = 0;
1614 aggregator->partner_system = null_mac_addr;
1615 aggregator->partner_system_priority = 0;
1616 aggregator->partner_oper_aggregator_key = 0;
1617 aggregator->receive_state = 0;
1618 aggregator->transmit_state = 0;
1619 aggregator->lag_ports = NULL;
1620 aggregator->is_active = 0;
1621 aggregator->num_of_ports = 0;
5a03cdb7 1622 pr_debug("LAG %d was cleared\n", aggregator->aggregator_identifier);
1da177e4
LT		 1623 }
1624}
1625
1626/**
1627 * ad_initialize_agg - initialize a given aggregator's parameters
1628 * @aggregator: the aggregator we're looking at
1629 *
1630 */
1631static void ad_initialize_agg(struct aggregator *aggregator)
1632{
1633 if (aggregator) {
1634 ad_clear_agg(aggregator);
1635
1636 aggregator->aggregator_mac_address = null_mac_addr;
1637 aggregator->aggregator_identifier = 0;
1638 aggregator->slave = NULL;
1639 }
1640}
1641
1642/**
1643 * ad_initialize_port - initialize a given port's parameters
1644 * @aggregator: the aggregator we're looking at
1645 * @lacp_fast: boolean. whether fast periodic should be used
1646 *
1647 */
1648static void ad_initialize_port(struct port *port, int lacp_fast)
1649{
c7e703d0
HE		 1650 static const struct port_params tmpl = {
1651 .system_priority = 0xffff,
1652 .key = 1,
1653 .port_number = 1,
1654 .port_priority = 0xff,
1655 .port_state = 1,
1656 };
1657
1da177e4
LT		 1658 if (port) {
1659 port->actor_port_number = 1;
1660 port->actor_port_priority = 0xff;
1661 port->actor_system = null_mac_addr;
1662 port->actor_system_priority = 0xffff;
1663 port->actor_port_aggregator_identifier = 0;
1664 port->ntt = 0;
1665 port->actor_admin_port_key = 1;
1666 port->actor_oper_port_key = 1;
1667 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1668 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1669
1670 if (lacp_fast) {
1671 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1672 }
1673
c7e703d0
HE		 1674 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1675 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1676
1da177e4
LT		 1677 port->is_enabled = 1;
1678 // ****** private parameters ******
1679 port->sm_vars = 0x3;
1680 port->sm_rx_state = 0;
1681 port->sm_rx_timer_counter = 0;
1682 port->sm_periodic_state = 0;
1683 port->sm_periodic_timer_counter = 0;
1684 port->sm_mux_state = 0;
1685 port->sm_mux_timer_counter = 0;
1686 port->sm_tx_state = 0;
1687 port->sm_tx_timer_counter = 0;
1688 port->slave = NULL;
1689 port->aggregator = NULL;
1690 port->next_port_in_aggregator = NULL;
1691 port->transaction_id = 0;
1692
1693 ad_initialize_lacpdu(&(port->lacpdu));
1694 }
1695}
1696
1697/**
1698 * ad_enable_collecting_distributing - enable a port's transmit/receive
1699 * @port: the port we're looking at
1700 *
1701 * Enable @port if it's in an active aggregator
1702 */
1703static void ad_enable_collecting_distributing(struct port *port)
1704{
1705 if (port->aggregator->is_active) {
5a03cdb7 1706 pr_debug("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4
LT		 1707 __enable_port(port);
1708 }
1709}
1710
1711/**
1712 * ad_disable_collecting_distributing - disable a port's transmit/receive
1713 * @port: the port we're looking at
1714 *
1715 */
1716static void ad_disable_collecting_distributing(struct port *port)
1717{
1718 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
5a03cdb7 1719 pr_debug("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4
LT		 1720 __disable_port(port);
1721 }
1722}
1723
1724#if 0
1725/**
1726 * ad_marker_info_send - send a marker information frame
1727 * @port: the port we're looking at
1728 *
1729 * This function does nothing since we decided not to implement send and handle
1730 * response for marker PDU's, in this stage, but only to respond to marker
1731 * information.
1732 */
1733static void ad_marker_info_send(struct port *port)
1734{
1c3f0b8e 1735 struct bond_marker marker;
1da177e4
LT		 1736 u16 index;
1737
1738 // fill the marker PDU with the appropriate values
1739 marker.subtype = 0x02;
1740 marker.version_number = 0x01;
1741 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1742 marker.marker_length = 0x16;
1743 // convert requester_port to Big Endian
1744 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1745 marker.requester_system = port->actor_system;
1746 // convert requester_port(u32) to Big Endian
1747 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24));
1748 marker.pad = 0;
1749 marker.tlv_type_terminator = 0x00;
1750 marker.terminator_length = 0x00;
1751 for (index=0; index<90; index++) {
1752 marker.reserved_90[index]=0;
1753 }
1754
1755 // send the marker information
1756 if (ad_marker_send(port, &marker) >= 0) {
5a03cdb7 1757 pr_debug("Sent Marker Information on port %d\n", port->actor_port_number);
1da177e4
LT		 1758 }
1759}
1760#endif
1761
1762/**
1763 * ad_marker_info_received - handle receive of a Marker information frame
1764 * @marker_info: Marker info received
1765 * @port: the port we're looking at
1766 *
1767 */
1c3f0b8e
MD		 1768static void ad_marker_info_received(struct bond_marker *marker_info,
1769 struct port *port)
1da177e4 1770{
1c3f0b8e 1771 struct bond_marker marker;
1da177e4
LT		 1772
1773 // copy the received marker data to the response marker
1774 //marker = *marker_info;
1c3f0b8e 1775 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1da177e4
LT		 1776 // change the marker subtype to marker response
1777 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE;
1778 // send the marker response
1779
1780 if (ad_marker_send(port, &marker) >= 0) {
5a03cdb7 1781 pr_debug("Sent Marker Response on port %d\n", port->actor_port_number);
1da177e4
LT		 1782 }
1783}
1784
1785/**
1786 * ad_marker_response_received - handle receive of a marker response frame
1787 * @marker: marker PDU received
1788 * @port: the port we're looking at
1789 *
1790 * This function does nothing since we decided not to implement send and handle
1791 * response for marker PDU's, in this stage, but only to respond to marker
1792 * information.
1793 */
1c3f0b8e
MD		 1794static void ad_marker_response_received(struct bond_marker *marker,
1795 struct port *port)
1da177e4
LT		 1796{
1797 marker=NULL; // just to satisfy the compiler
1798 port=NULL; // just to satisfy the compiler
1799 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1800}
1801
1802/**
1803 * ad_initialize_lacpdu - initialize a given lacpdu structure
1804 * @lacpdu: lacpdu structure to initialize
1805 *
1806 */
1807static void ad_initialize_lacpdu(struct lacpdu *lacpdu)
1808{
1809 u16 index;
1810
1811 // initialize lacpdu data
1812 lacpdu->subtype = 0x01;
1813 lacpdu->version_number = 0x01;
1814 lacpdu->tlv_type_actor_info = 0x01;
1815 lacpdu->actor_information_length = 0x14;
1816 // lacpdu->actor_system_priority updated on send
1817 // lacpdu->actor_system updated on send
1818 // lacpdu->actor_key updated on send
1819 // lacpdu->actor_port_priority updated on send
1820 // lacpdu->actor_port updated on send
1821 // lacpdu->actor_state updated on send
1822 lacpdu->tlv_type_partner_info = 0x02;
1823 lacpdu->partner_information_length = 0x14;
1824 for (index=0; index<=2; index++) {
1825 lacpdu->reserved_3_1[index]=0;
1826 }
1827 // lacpdu->partner_system_priority updated on send
1828 // lacpdu->partner_system updated on send
1829 // lacpdu->partner_key updated on send
1830 // lacpdu->partner_port_priority updated on send
1831 // lacpdu->partner_port updated on send
1832 // lacpdu->partner_state updated on send
1833 for (index=0; index<=2; index++) {
1834 lacpdu->reserved_3_2[index]=0;
1835 }
1836 lacpdu->tlv_type_collector_info = 0x03;
1837 lacpdu->collector_information_length= 0x10;
d3bb52b0 1838 lacpdu->collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY);
1da177e4
LT		 1839 for (index=0; index<=11; index++) {
1840 lacpdu->reserved_12[index]=0;
1841 }
1842 lacpdu->tlv_type_terminator = 0x00;
1843 lacpdu->terminator_length = 0;
1844 for (index=0; index<=49; index++) {
1845 lacpdu->reserved_50[index]=0;
1846 }
1847}
1848
1849//////////////////////////////////////////////////////////////////////////////////////
1850// ================= AD exported functions to the main bonding code ==================
1851//////////////////////////////////////////////////////////////////////////////////////
1852
1853// Check aggregators status in team every T seconds
1854#define AD_AGGREGATOR_SELECTION_TIMER 8
1855
fd989c83
JV		 1856/*
1857 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1858 *
1859 * Set the aggregation selection timer, to initiate an agg selection in
1860 * the very near future. Called during first initialization, and during
1861 * any down to up transitions of the bond.
1862 */
1863void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1864{
1865 BOND_AD_INFO(bond).agg_select_timer = timeout;
1866 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select;
1867}
1868
1da177e4
LT		 1869static u16 aggregator_identifier;
1870
1871/**
1872 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1873 * @bond: bonding struct to work on
1874 * @tick_resolution: tick duration (millisecond resolution)
1875 * @lacp_fast: boolean. whether fast periodic should be used
1876 *
1877 * Can be called only after the mac address of the bond is set.
1878 */
1879void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
1880{
1881 // check that the bond is not initialized yet
1882 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) {
1883
1884 aggregator_identifier = 0;
1885
1886 BOND_AD_INFO(bond).lacp_fast = lacp_fast;
1887 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1888 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1889
1890 // initialize how many times this module is called in one second(should be about every 100ms)
1891 ad_ticks_per_sec = tick_resolution;
1892
fd989c83
JV		 1893 bond_3ad_initiate_agg_selection(bond,
1894 AD_AGGREGATOR_SELECTION_TIMER *
1895 ad_ticks_per_sec);
1da177e4
LT		 1896 }
1897}
1898
1899/**
1900 * bond_3ad_bind_slave - initialize a slave's port
1901 * @slave: slave struct to work on
1902 *
1903 * Returns: 0 on success
1904 * < 0 on error
1905 */
1906int bond_3ad_bind_slave(struct slave *slave)
1907{
1908 struct bonding *bond = bond_get_bond_by_slave(slave);
1909 struct port *port;
1910 struct aggregator *aggregator;
1911
1912 if (bond == NULL) {
4e0952c7
MW		 1913 printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n",
1914 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 1915 return -1;
1916 }
1917
1918 //check that the slave has not been intialized yet.
1919 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1920
1921 // port initialization
1922 port = &(SLAVE_AD_INFO(slave).port);
1923
1924 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
1925
1926 port->slave = slave;
1927 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1928 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1929 // ------------------------------------------------------------
1930 // Port key : | User key | Speed |Duplex|
1931 // ------------------------------------------------------------
1932 // 16 6 1 0
1933 port->actor_admin_port_key = 0; // initialize this parameter
1934 port->actor_admin_port_key |= __get_duplex(port);
1935 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1936 port->actor_oper_port_key = port->actor_admin_port_key;
1937 // if the port is not full duplex, then the port should be not lacp Enabled
1938 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1939 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1940 }
1941 // actor system is the bond's system
1942 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1943 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1944 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1945 port->aggregator = NULL;
1946 port->next_port_in_aggregator = NULL;
1947
1948 __disable_port(port);
1949 __initialize_port_locks(port);
1950
1951
1952 // aggregator initialization
1953 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1954
1955 ad_initialize_agg(aggregator);
1956
1957 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1958 aggregator->aggregator_identifier = (++aggregator_identifier);
1959 aggregator->slave = slave;
1960 aggregator->is_active = 0;
1961 aggregator->num_of_ports = 0;
1962 }
1963
1964 return 0;
1965}
1966
1967/**
1968 * bond_3ad_unbind_slave - deinitialize a slave's port
1969 * @slave: slave struct to work on
1970 *
1971 * Search for the aggregator that is related to this port, remove the
1972 * aggregator and assign another aggregator for other port related to it
1973 * (if any), and remove the port.
1974 */
1975void bond_3ad_unbind_slave(struct slave *slave)
1976{
1977 struct port *port, *prev_port, *temp_port;
1978 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1979 int select_new_active_agg = 0;
1980
1981 // find the aggregator related to this slave
1982 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1983
1984 // find the port related to this slave
1985 port = &(SLAVE_AD_INFO(slave).port);
1986
1987 // if slave is null, the whole port is not initialized
1988 if (!port->slave) {
4e0952c7
MW		 1989 printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to "
1990 "unbind an uninitialized port on %s\n",
1991 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 1992 return;
1993 }
1994
5a03cdb7 1995 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier);
1da177e4
LT		 1996
1997 /* Tell the partner that this port is not suitable for aggregation */
1998 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1999 __update_lacpdu_from_port(port);
2000 ad_lacpdu_send(port);
2001
2002 // check if this aggregator is occupied
2003 if (aggregator->lag_ports) {
2004 // check if there are other ports related to this aggregator except
2005 // the port related to this slave(thats ensure us that there is a
2006 // reason to search for new aggregator, and that we will find one
2007 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2008 // find new aggregator for the related port(s)
2009 new_aggregator = __get_first_agg(port);
2010 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
2011 // if the new aggregator is empty, or it connected to to our port only
2012 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) {
2013 break;
2014 }
2015 }
2016 // if new aggregator found, copy the aggregator's parameters
2017 // and connect the related lag_ports to the new aggregator
2018 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
5a03cdb7 2019 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier);
1da177e4
LT		 2020
2021 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
4e0952c7
MW		 2022 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2023 aggregator->slave->dev->master->name);
1da177e4
LT		 2024 // select new active aggregator
2025 select_new_active_agg = 1;
2026 }
2027
2028 new_aggregator->is_individual = aggregator->is_individual;
2029 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2030 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2031 new_aggregator->partner_system = aggregator->partner_system;
2032 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2033 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2034 new_aggregator->receive_state = aggregator->receive_state;
2035 new_aggregator->transmit_state = aggregator->transmit_state;
2036 new_aggregator->lag_ports = aggregator->lag_ports;
2037 new_aggregator->is_active = aggregator->is_active;
2038 new_aggregator->num_of_ports = aggregator->num_of_ports;
2039
2040 // update the information that is written on the ports about the aggregator
2041 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) {
2042 temp_port->aggregator=new_aggregator;
2043 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2044 }
2045
2046 // clear the aggregator
2047 ad_clear_agg(aggregator);
2048
2049 if (select_new_active_agg) {
2050 ad_agg_selection_logic(__get_first_agg(port));
2051 }
2052 } else {
4e0952c7
MW		 2053 printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, "
2054 "and could not find a new aggregator for its ports\n",
2055 slave->dev->master->name);
1da177e4
LT		 2056 }
2057 } else { // in case that the only port related to this aggregator is the one we want to remove
2058 select_new_active_agg = aggregator->is_active;
2059 // clear the aggregator
2060 ad_clear_agg(aggregator);
2061 if (select_new_active_agg) {
4e0952c7
MW		 2062 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2063 slave->dev->master->name);
1da177e4
LT		 2064 // select new active aggregator
2065 ad_agg_selection_logic(__get_first_agg(port));
2066 }
2067 }
2068 }
2069
5a03cdb7 2070 pr_debug("Unbinding port %d\n", port->actor_port_number);
1da177e4
LT		 2071 // find the aggregator that this port is connected to
2072 temp_aggregator = __get_first_agg(port);
2073 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2074 prev_port = NULL;
2075 // search the port in the aggregator's related ports
2076 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) {
2077 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
2078 if (prev_port) {
2079 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2080 } else {
2081 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2082 }
2083 temp_aggregator->num_of_ports--;
2084 if (temp_aggregator->num_of_ports==0) {
2085 select_new_active_agg = temp_aggregator->is_active;
2086 // clear the aggregator
2087 ad_clear_agg(temp_aggregator);
2088 if (select_new_active_agg) {
4e0952c7
MW		 2089 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2090 slave->dev->master->name);
1da177e4
LT		 2091 // select new active aggregator
2092 ad_agg_selection_logic(__get_first_agg(port));
2093 }
2094 }
2095 break;
2096 }
2097 }
2098 }
2099 port->slave=NULL;
2100}
2101
2102/**
2103 * bond_3ad_state_machine_handler - handle state machines timeout
2104 * @bond: bonding struct to work on
2105 *
2106 * The state machine handling concept in this module is to check every tick
2107 * which state machine should operate any function. The execution order is
2108 * round robin, so when we have an interaction between state machines, the
2109 * reply of one to each other might be delayed until next tick.
2110 *
2111 * This function also complete the initialization when the agg_select_timer
2112 * times out, and it selects an aggregator for the ports that are yet not
2113 * related to any aggregator, and selects the active aggregator for a bond.
2114 */
1b76b316 2115void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2116{
1b76b316
JV		 2117 struct bonding *bond = container_of(work, struct bonding,
2118 ad_work.work);
1da177e4
LT		 2119 struct port *port;
2120 struct aggregator *aggregator;
2121
2122 read_lock(&bond->lock);
2123
2124 if (bond->kill_timers) {
2125 goto out;
2126 }
2127
2128 //check if there are any slaves
2129 if (bond->slave_cnt == 0) {
2130 goto re_arm;
2131 }
2132
2133 // check if agg_select_timer timer after initialize is timed out
2134 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2135 // select the active aggregator for the bond
2136 if ((port = __get_first_port(bond))) {
2137 if (!port->slave) {
4e0952c7
MW		 2138 printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is "
2139 "uninitialized\n", bond->dev->name);
1da177e4
LT		 2140 goto re_arm;
2141 }
2142
2143 aggregator = __get_first_agg(port);
2144 ad_agg_selection_logic(aggregator);
2145 }
f0c76d61 2146 bond_3ad_set_carrier(bond);
1da177e4
LT		 2147 }
2148
2149 // for each port run the state machines
2150 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2151 if (!port->slave) {
4e0952c7
MW		 2152 printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized "
2153 "port\n", bond->dev->name);
1da177e4
LT		 2154 goto re_arm;
2155 }
2156
2157 ad_rx_machine(NULL, port);
2158 ad_periodic_machine(port);
2159 ad_port_selection_logic(port);
2160 ad_mux_machine(port);
2161 ad_tx_machine(port);
2162
2163 // turn off the BEGIN bit, since we already handled it
2164 if (port->sm_vars & AD_PORT_BEGIN) {
2165 port->sm_vars &= ~AD_PORT_BEGIN;
2166 }
2167 }
2168
2169re_arm:
1b76b316 2170 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1da177e4
LT		 2171out:
2172 read_unlock(&bond->lock);
2173}
2174
2175/**
2176 * bond_3ad_rx_indication - handle a received frame
2177 * @lacpdu: received lacpdu
2178 * @slave: slave struct to work on
2179 * @length: length of the data received
2180 *
2181 * It is assumed that frames that were sent on this NIC don't returned as new
2182 * received frames (loopback). Since only the payload is given to this
2183 * function, it check for loopback.
2184 */
2185static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2186{
2187 struct port *port;
2188
2189 if (length >= sizeof(struct lacpdu)) {
2190
2191 port = &(SLAVE_AD_INFO(slave).port);
2192
2193 if (!port->slave) {
4e0952c7
MW		 2194 printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is "
2195 "uninitialized\n", slave->dev->name, slave->dev->master->name);
1da177e4
LT		 2196 return;
2197 }
2198
2199 switch (lacpdu->subtype) {
2200 case AD_TYPE_LACPDU:
5a03cdb7 2201 pr_debug("Received LACPDU on port %d\n", port->actor_port_number);
1da177e4
LT		 2202 ad_rx_machine(lacpdu, port);
2203 break;
2204
2205 case AD_TYPE_MARKER:
2206 // No need to convert fields to Little Endian since we don't use the marker's fields.
2207
1c3f0b8e 2208 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2209 case AD_MARKER_INFORMATION_SUBTYPE:
5a03cdb7 2210 pr_debug("Received Marker Information on port %d\n", port->actor_port_number);
1c3f0b8e 2211 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2212 break;
2213
2214 case AD_MARKER_RESPONSE_SUBTYPE:
5a03cdb7 2215 pr_debug("Received Marker Response on port %d\n", port->actor_port_number);
1c3f0b8e 2216 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2217 break;
2218
2219 default:
5a03cdb7 2220 pr_debug("Received an unknown Marker subtype on slot %d\n", port->actor_port_number);
1da177e4
LT		 2221 }
2222 }
2223 }
2224}
2225
2226/**
2227 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2228 * @slave: slave struct to work on
2229 *
2230 * Handle reselection of aggregator (if needed) for this port.
2231 */
2232void bond_3ad_adapter_speed_changed(struct slave *slave)
2233{
2234 struct port *port;
2235
2236 port = &(SLAVE_AD_INFO(slave).port);
2237
2238 // if slave is null, the whole port is not initialized
2239 if (!port->slave) {
4e0952c7
MW		 2240 printk(KERN_WARNING DRV_NAME ": Warning: %s: speed "
2241 "changed for uninitialized port on %s\n",
2242 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2243 return;
2244 }
2245
2246 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2247 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
5a03cdb7 2248 pr_debug("Port %d changed speed\n", port->actor_port_number);
1da177e4
LT		 2249 // there is no need to reselect a new aggregator, just signal the
2250 // state machines to reinitialize
2251 port->sm_vars |= AD_PORT_BEGIN;
2252}
2253
2254/**
2255 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2256 * @slave: slave struct to work on
2257 *
2258 * Handle reselection of aggregator (if needed) for this port.
2259 */
2260void bond_3ad_adapter_duplex_changed(struct slave *slave)
2261{
2262 struct port *port;
2263
2264 port=&(SLAVE_AD_INFO(slave).port);
2265
2266 // if slave is null, the whole port is not initialized
2267 if (!port->slave) {
4e0952c7
MW		 2268 printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed "
2269 "for uninitialized port on %s\n",
2270 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2271 return;
2272 }
2273
2274 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2275 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
5a03cdb7 2276 pr_debug("Port %d changed duplex\n", port->actor_port_number);
1da177e4
LT		 2277 // there is no need to reselect a new aggregator, just signal the
2278 // state machines to reinitialize
2279 port->sm_vars |= AD_PORT_BEGIN;
2280}
2281
2282/**
2283 * bond_3ad_handle_link_change - handle a slave's link status change indication
2284 * @slave: slave struct to work on
2285 * @status: whether the link is now up or down
2286 *
2287 * Handle reselection of aggregator (if needed) for this port.
2288 */
2289void bond_3ad_handle_link_change(struct slave *slave, char link)
2290{
2291 struct port *port;
2292
2293 port = &(SLAVE_AD_INFO(slave).port);
2294
2295 // if slave is null, the whole port is not initialized
2296 if (!port->slave) {
4e0952c7
MW		 2297 printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for "
2298 "uninitialized port on %s\n",
2299 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2300 return;
2301 }
2302
2303 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
2304 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2305 if (link == BOND_LINK_UP) {
2306 port->is_enabled = 1;
2307 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2308 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2309 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2310 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2311 } else {
2312 /* link has failed */
2313 port->is_enabled = 0;
2314 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2315 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS);
2316 }
2317 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2318 // there is no need to reselect a new aggregator, just signal the
2319 // state machines to reinitialize
2320 port->sm_vars |= AD_PORT_BEGIN;
2321}
2322
ff59c456 2323/*
031ae4de 2324 * set link state for bonding master: if we have an active
ff59c456
JV		 2325 * aggregator, we're up, if not, we're down. Presumes that we cannot
2326 * have an active aggregator if there are no slaves with link up.
2327 *
031ae4de
JV		 2328 * This behavior complies with IEEE 802.3 section 43.3.9.
2329 *
ff59c456
JV		 2330 * Called by bond_set_carrier(). Return zero if carrier state does not
2331 * change, nonzero if it does.
2332 */
2333int bond_3ad_set_carrier(struct bonding *bond)
2334{
031ae4de 2335 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
ff59c456
JV		 2336 if (!netif_carrier_ok(bond->dev)) {
2337 netif_carrier_on(bond->dev);
2338 return 1;
2339 }
2340 return 0;
2341 }
2342
2343 if (netif_carrier_ok(bond->dev)) {
2344 netif_carrier_off(bond->dev);
2345 return 1;
2346 }
2347 return 0;
2348}
2349
1da177e4
LT		 2350/**
2351 * bond_3ad_get_active_agg_info - get information of the active aggregator
2352 * @bond: bonding struct to work on
2353 * @ad_info: ad_info struct to fill with the bond's info
2354 *
2355 * Returns: 0 on success
2356 * < 0 on error
2357 */
2358int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2359{
2360 struct aggregator *aggregator = NULL;
2361 struct port *port;
2362
2363 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2364 if (port->aggregator && port->aggregator->is_active) {
2365 aggregator = port->aggregator;
2366 break;
2367 }
2368 }
2369
2370 if (aggregator) {
2371 ad_info->aggregator_id = aggregator->aggregator_identifier;
2372 ad_info->ports = aggregator->num_of_ports;
2373 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2374 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2375 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2376 return 0;
2377 }
2378
2379 return -1;
2380}
2381
2382int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2383{
2384 struct slave *slave, *start_at;
454d7c9b 2385 struct bonding *bond = netdev_priv(dev);
1da177e4
LT		 2386 int slave_agg_no;
2387 int slaves_in_agg;
2388 int agg_id;
2389 int i;
2390 struct ad_info ad_info;
2391 int res = 1;
2392
2393 /* make sure that the slaves list will
2394 * not change during tx
2395 */
2396 read_lock(&bond->lock);
2397
2398 if (!BOND_IS_OK(bond)) {
2399 goto out;
2400 }
2401
2402 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
4e0952c7
MW		 2403 printk(KERN_DEBUG DRV_NAME ": %s: Error: "
2404 "bond_3ad_get_active_agg_info failed\n", dev->name);
1da177e4
LT		 2405 goto out;
2406 }
2407
2408 slaves_in_agg = ad_info.ports;
2409 agg_id = ad_info.aggregator_id;
2410
2411 if (slaves_in_agg == 0) {
2412 /*the aggregator is empty*/
4e0952c7
MW		 2413 printk(KERN_DEBUG DRV_NAME ": %s: Error: active "
2414 "aggregator is empty\n",
2415 dev->name);
1da177e4
LT		 2416 goto out;
2417 }
2418
169a3e66 2419 slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg);
1da177e4
LT		 2420
2421 bond_for_each_slave(bond, slave, i) {
2422 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2423
2424 if (agg && (agg->aggregator_identifier == agg_id)) {
2425 slave_agg_no--;
2426 if (slave_agg_no < 0) {
2427 break;
2428 }
2429 }
2430 }
2431
2432 if (slave_agg_no >= 0) {
4e0952c7
MW		 2433 printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on "
2434 "for aggregator ID %d\n", dev->name, agg_id);
1da177e4
LT		 2435 goto out;
2436 }
2437
2438 start_at = slave;
2439
2440 bond_for_each_slave_from(bond, slave, i, start_at) {
2441 int slave_agg_id = 0;
2442 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2443
2444 if (agg) {
2445 slave_agg_id = agg->aggregator_identifier;
2446 }
2447
2448 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2449 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2450 break;
2451 }
2452 }
2453
2454out:
2455 if (res) {
2456 /* no suitable interface, frame not sent */
2457 dev_kfree_skb(skb);
2458 }
2459 read_unlock(&bond->lock);
2460 return 0;
2461}
2462
f2ccd8fa 2463int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev)
1da177e4 2464{
454d7c9b 2465 struct bonding *bond = netdev_priv(dev);
1da177e4
LT		 2466 struct slave *slave = NULL;
2467 int ret = NET_RX_DROP;
2468
c346dca1 2469 if (dev_net(dev) != &init_net)
e730c155
EB		 2470 goto out;
2471
f2ccd8fa 2472 if (!(dev->flags & IFF_MASTER))
1da177e4 2473 goto out;
1da177e4
LT		 2474
2475 read_lock(&bond->lock);
454d7c9b
WC		 2476 slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev),
2477 orig_dev);
f2ccd8fa 2478 if (!slave)
1da177e4 2479 goto out_unlock;
1da177e4
LT		 2480
2481 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
2482
2483 ret = NET_RX_SUCCESS;
2484
2485out_unlock:
2486 read_unlock(&bond->lock);
2487out:
2488 dev_kfree_skb(skb);
2489
2490 return ret;
2491}
2492
Linux kernel - Deliverables
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