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bonding: improve elaborate port_state assignment
[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
98// ================= 3AD api to bonding and kernel code ==================
99static u16 __get_link_speed(struct port *port);
100static u8 __get_duplex(struct port *port);
101static inline void __initialize_port_locks(struct port *port);
102//conversions
1da177e4
LT		 103static u16 __ad_timer_to_ticks(u16 timer_type, u16 Par);
104
105
106// ================= ad code helper functions ==================
107//needed by ad_rx_machine(...)
108static void __record_pdu(struct lacpdu *lacpdu, struct port *port);
109static void __record_default(struct port *port);
110static void __update_selected(struct lacpdu *lacpdu, struct port *port);
111static void __update_default_selected(struct port *port);
112static void __choose_matched(struct lacpdu *lacpdu, struct port *port);
113static void __update_ntt(struct lacpdu *lacpdu, struct port *port);
114
115//needed for ad_mux_machine(..)
116static void __attach_bond_to_agg(struct port *port);
117static void __detach_bond_from_agg(struct port *port);
118static int __agg_ports_are_ready(struct aggregator *aggregator);
119static void __set_agg_ports_ready(struct aggregator *aggregator, int val);
120
121//needed for ad_agg_selection_logic(...)
122static u32 __get_agg_bandwidth(struct aggregator *aggregator);
123static struct aggregator *__get_active_agg(struct aggregator *aggregator);
124
125
126// ================= main 802.3ad protocol functions ==================
127static int ad_lacpdu_send(struct port *port);
1c3f0b8e 128static int ad_marker_send(struct port *port, struct bond_marker *marker);
1da177e4
LT		 129static void ad_mux_machine(struct port *port);
130static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
131static void ad_tx_machine(struct port *port);
132static void ad_periodic_machine(struct port *port);
133static void ad_port_selection_logic(struct port *port);
134static void ad_agg_selection_logic(struct aggregator *aggregator);
135static void ad_clear_agg(struct aggregator *aggregator);
136static void ad_initialize_agg(struct aggregator *aggregator);
137static void ad_initialize_port(struct port *port, int lacp_fast);
138static void ad_initialize_lacpdu(struct lacpdu *Lacpdu);
139static void ad_enable_collecting_distributing(struct port *port);
140static void ad_disable_collecting_distributing(struct port *port);
1c3f0b8e
MD		 141static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
142static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
1da177e4
LT		 143
144
145/////////////////////////////////////////////////////////////////////////////////
146// ================= api to bonding and kernel code ==================
147/////////////////////////////////////////////////////////////////////////////////
148
149/**
150 * __get_bond_by_port - get the port's bonding struct
151 * @port: the port we're looking at
152 *
153 * Return @port's bonding struct, or %NULL if it can't be found.
154 */
155static inline struct bonding *__get_bond_by_port(struct port *port)
156{
157 if (port->slave == NULL) {
158 return NULL;
159 }
160
161 return bond_get_bond_by_slave(port->slave);
162}
163
164/**
165 * __get_first_port - get the first port in the bond
166 * @bond: the bond we're looking at
167 *
168 * Return the port of the first slave in @bond, or %NULL if it can't be found.
169 */
170static inline struct port *__get_first_port(struct bonding *bond)
171{
172 if (bond->slave_cnt == 0) {
173 return NULL;
174 }
175
176 return &(SLAVE_AD_INFO(bond->first_slave).port);
177}
178
179/**
180 * __get_next_port - get the next port in the bond
181 * @port: the port we're looking at
182 *
183 * Return the port of the slave that is next in line of @port's slave in the
184 * bond, or %NULL if it can't be found.
185 */
186static inline struct port *__get_next_port(struct port *port)
187{
188 struct bonding *bond = __get_bond_by_port(port);
189 struct slave *slave = port->slave;
190
191 // If there's no bond for this port, or this is the last slave
192 if ((bond == NULL) || (slave->next == bond->first_slave)) {
193 return NULL;
194 }
195
196 return &(SLAVE_AD_INFO(slave->next).port);
197}
198
199/**
200 * __get_first_agg - get the first aggregator in the bond
201 * @bond: the bond we're looking at
202 *
203 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
204 * found.
205 */
206static inline struct aggregator *__get_first_agg(struct port *port)
207{
208 struct bonding *bond = __get_bond_by_port(port);
209
210 // If there's no bond for this port, or bond has no slaves
211 if ((bond == NULL) || (bond->slave_cnt == 0)) {
212 return NULL;
213 }
214
215 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
216}
217
218/**
219 * __get_next_agg - get the next aggregator in the bond
220 * @aggregator: the aggregator we're looking at
221 *
222 * Return the aggregator of the slave that is next in line of @aggregator's
223 * slave in the bond, or %NULL if it can't be found.
224 */
225static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
226{
227 struct slave *slave = aggregator->slave;
228 struct bonding *bond = bond_get_bond_by_slave(slave);
229
230 // If there's no bond for this aggregator, or this is the last slave
231 if ((bond == NULL) || (slave->next == bond->first_slave)) {
232 return NULL;
233 }
234
235 return &(SLAVE_AD_INFO(slave->next).aggregator);
236}
237
fd989c83
JV		 238/*
239 * __agg_has_partner
240 *
241 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
242 * address for the partner). Return 0 if not.
243 */
244static inline int __agg_has_partner(struct aggregator *agg)
245{
246 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
247}
248
1da177e4
LT		 249/**
250 * __disable_port - disable the port's slave
251 * @port: the port we're looking at
252 *
253 */
254static inline void __disable_port(struct port *port)
255{
256 bond_set_slave_inactive_flags(port->slave);
257}
258
259/**
260 * __enable_port - enable the port's slave, if it's up
261 * @port: the port we're looking at
262 *
263 */
264static inline void __enable_port(struct port *port)
265{
266 struct slave *slave = port->slave;
267
268 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) {
269 bond_set_slave_active_flags(slave);
270 }
271}
272
273/**
274 * __port_is_enabled - check if the port's slave is in active state
275 * @port: the port we're looking at
276 *
277 */
278static inline int __port_is_enabled(struct port *port)
279{
280 return(port->slave->state == BOND_STATE_ACTIVE);
281}
282
283/**
284 * __get_agg_selection_mode - get the aggregator selection mode
285 * @port: the port we're looking at
286 *
fd989c83 287 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 288 */
289static inline u32 __get_agg_selection_mode(struct port *port)
290{
291 struct bonding *bond = __get_bond_by_port(port);
292
293 if (bond == NULL) {
fd989c83 294 return BOND_AD_STABLE;
1da177e4
LT		 295 }
296
297 return BOND_AD_INFO(bond).agg_select_mode;
298}
299
300/**
301 * __check_agg_selection_timer - check if the selection timer has expired
302 * @port: the port we're looking at
303 *
304 */
305static inline int __check_agg_selection_timer(struct port *port)
306{
307 struct bonding *bond = __get_bond_by_port(port);
308
309 if (bond == NULL) {
310 return 0;
311 }
312
313 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
314}
315
316/**
317 * __get_rx_machine_lock - lock the port's RX machine
318 * @port: the port we're looking at
319 *
320 */
321static inline void __get_rx_machine_lock(struct port *port)
322{
2bf86b7a 323 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
1da177e4
LT		 324}
325
326/**
327 * __release_rx_machine_lock - unlock the port's RX machine
328 * @port: the port we're looking at
329 *
330 */
331static inline void __release_rx_machine_lock(struct port *port)
332{
2bf86b7a 333 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
1da177e4
LT		 334}
335
336/**
337 * __get_link_speed - get a port's speed
338 * @port: the port we're looking at
339 *
340 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
341 * 0,
342 * %AD_LINK_SPEED_BITMASK_10MBPS,
343 * %AD_LINK_SPEED_BITMASK_100MBPS,
94dbffd5
JV		 344 * %AD_LINK_SPEED_BITMASK_1000MBPS,
345 * %AD_LINK_SPEED_BITMASK_10000MBPS
1da177e4
LT		 346 */
347static u16 __get_link_speed(struct port *port)
348{
349 struct slave *slave = port->slave;
350 u16 speed;
351
352 /* this if covers only a special case: when the configuration starts with
353 * link down, it sets the speed to 0.
354 * This is done in spite of the fact that the e100 driver reports 0 to be
355 * compatible with MVT in the future.*/
356 if (slave->link != BOND_LINK_UP) {
357 speed=0;
358 } else {
359 switch (slave->speed) {
360 case SPEED_10:
361 speed = AD_LINK_SPEED_BITMASK_10MBPS;
362 break;
363
364 case SPEED_100:
365 speed = AD_LINK_SPEED_BITMASK_100MBPS;
366 break;
367
368 case SPEED_1000:
369 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
370 break;
371
94dbffd5
JV		 372 case SPEED_10000:
373 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
374 break;
375
1da177e4
LT		 376 default:
377 speed = 0; // unknown speed value from ethtool. shouldn't happen
378 break;
379 }
380 }
381
5a03cdb7 382 pr_debug("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed);
1da177e4
LT		 383 return speed;
384}
385
386/**
387 * __get_duplex - get a port's duplex
388 * @port: the port we're looking at
389 *
390 * Return @port's duplex in 802.3ad bitmask format. i.e.:
391 * 0x01 if in full duplex
392 * 0x00 otherwise
393 */
394static u8 __get_duplex(struct port *port)
395{
396 struct slave *slave = port->slave;
397
398 u8 retval;
399
400 // handling a special case: when the configuration starts with
401 // link down, it sets the duplex to 0.
402 if (slave->link != BOND_LINK_UP) {
403 retval=0x0;
404 } else {
405 switch (slave->duplex) {
406 case DUPLEX_FULL:
407 retval=0x1;
5a03cdb7 408 pr_debug("Port %d Received status full duplex update from adapter\n", port->actor_port_number);
1da177e4
LT		 409 break;
410 case DUPLEX_HALF:
411 default:
412 retval=0x0;
5a03cdb7 413 pr_debug("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number);
1da177e4
LT		 414 break;
415 }
416 }
417 return retval;
418}
419
420/**
421 * __initialize_port_locks - initialize a port's RX machine spinlock
422 * @port: the port we're looking at
423 *
424 */
425static inline void __initialize_port_locks(struct port *port)
426{
427 // make sure it isn't called twice
428 spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock));
429}
430
431//conversions
1da177e4
LT		 432
433/**
434 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
435 * @timer_type: which timer to operate
436 * @par: timer parameter. see below
437 *
438 * If @timer_type is %current_while_timer, @par indicates long/short timer.
439 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
440 * %SLOW_PERIODIC_TIME.
441 */
442static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
443{
444 u16 retval=0; //to silence the compiler
445
446 switch (timer_type) {
447 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
448 if (par) { // for short or long timeout
449 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
450 } else {
451 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
452 }
453 break;
454 case AD_ACTOR_CHURN_TIMER: // for local churn machine
455 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
456 break;
457 case AD_PERIODIC_TIMER: // for periodic machine
458 retval = (par*ad_ticks_per_sec); // long timeout
459 break;
460 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
461 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
462 break;
463 case AD_WAIT_WHILE_TIMER: // for selection machine
464 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
465 break;
466 }
467 return retval;
468}
469
470
471/////////////////////////////////////////////////////////////////////////////////
472// ================= ad_rx_machine helper functions ==================
473/////////////////////////////////////////////////////////////////////////////////
474
475/**
476 * __record_pdu - record parameters from a received lacpdu
477 * @lacpdu: the lacpdu we've received
478 * @port: the port we're looking at
479 *
480 * Record the parameter values for the Actor carried in a received lacpdu as
481 * the current partner operational parameter values and sets
482 * actor_oper_port_state.defaulted to FALSE.
483 */
484static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
485{
486 // validate lacpdu and port
487 if (lacpdu && port) {
488 // record the new parameter values for the partner operational
89cc76f9
JV		 489 port->partner_oper_port_number = ntohs(lacpdu->actor_port);
490 port->partner_oper_port_priority = ntohs(lacpdu->actor_port_priority);
1da177e4 491 port->partner_oper_system = lacpdu->actor_system;
89cc76f9
JV		 492 port->partner_oper_system_priority = ntohs(lacpdu->actor_system_priority);
493 port->partner_oper_key = ntohs(lacpdu->actor_key);
aa312819 494 port->partner_oper_port_state = lacpdu->actor_state;
1da177e4
LT		 495
496 // set actor_oper_port_state.defaulted to FALSE
497 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
498
499 // set the partner sync. to on if the partner is sync. and the port is matched
500 if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
501 port->partner_oper_port_state |= AD_STATE_SYNCHRONIZATION;
502 } else {
503 port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
504 }
505 }
506}
507
508/**
509 * __record_default - record default parameters
510 * @port: the port we're looking at
511 *
512 * This function records the default parameter values for the partner carried
513 * in the Partner Admin parameters as the current partner operational parameter
514 * values and sets actor_oper_port_state.defaulted to TRUE.
515 */
516static void __record_default(struct port *port)
517{
518 // validate the port
519 if (port) {
520 // record the partner admin parameters
521 port->partner_oper_port_number = port->partner_admin_port_number;
522 port->partner_oper_port_priority = port->partner_admin_port_priority;
523 port->partner_oper_system = port->partner_admin_system;
524 port->partner_oper_system_priority = port->partner_admin_system_priority;
525 port->partner_oper_key = port->partner_admin_key;
526 port->partner_oper_port_state = port->partner_admin_port_state;
527
528 // set actor_oper_port_state.defaulted to true
529 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
530 }
531}
532
533/**
534 * __update_selected - update a port's Selected variable from a received lacpdu
535 * @lacpdu: the lacpdu we've received
536 * @port: the port we're looking at
537 *
538 * Update the value of the selected variable, using parameter values from a
539 * newly received lacpdu. The parameter values for the Actor carried in the
540 * received PDU are compared with the corresponding operational parameter
541 * values for the ports partner. If one or more of the comparisons shows that
542 * the value(s) received in the PDU differ from the current operational values,
543 * then selected is set to FALSE and actor_oper_port_state.synchronization is
544 * set to out_of_sync. Otherwise, selected remains unchanged.
545 */
546static void __update_selected(struct lacpdu *lacpdu, struct port *port)
547{
548 // validate lacpdu and port
549 if (lacpdu && port) {
550 // check if any parameter is different
89cc76f9
JV		 551 if ((ntohs(lacpdu->actor_port) != port->partner_oper_port_number) ||
552 (ntohs(lacpdu->actor_port_priority) != port->partner_oper_port_priority) ||
1da177e4 553 MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper_system)) ||
89cc76f9
JV		 554 (ntohs(lacpdu->actor_system_priority) != port->partner_oper_system_priority) ||
555 (ntohs(lacpdu->actor_key) != port->partner_oper_key) ||
1da177e4
LT		 556 ((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION))
557 ) {
558 // update the state machine Selected variable
559 port->sm_vars &= ~AD_PORT_SELECTED;
560 }
561 }
562}
563
564/**
565 * __update_default_selected - update a port's Selected variable from Partner
566 * @port: the port we're looking at
567 *
568 * This function updates the value of the selected variable, using the partner
569 * administrative parameter values. The administrative values are compared with
570 * the corresponding operational parameter values for the partner. If one or
571 * more of the comparisons shows that the administrative value(s) differ from
572 * the current operational values, then Selected is set to FALSE and
573 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
574 * Selected remains unchanged.
575 */
576static void __update_default_selected(struct port *port)
577{
578 // validate the port
579 if (port) {
580 // check if any parameter is different
581 if ((port->partner_admin_port_number != port->partner_oper_port_number) ||
582 (port->partner_admin_port_priority != port->partner_oper_port_priority) ||
583 MAC_ADDRESS_COMPARE(&(port->partner_admin_system), &(port->partner_oper_system)) ||
584 (port->partner_admin_system_priority != port->partner_oper_system_priority) ||
585 (port->partner_admin_key != port->partner_oper_key) ||
586 ((port->partner_admin_port_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION))
587 ) {
588 // update the state machine Selected variable
589 port->sm_vars &= ~AD_PORT_SELECTED;
590 }
591 }
592}
593
594/**
595 * __choose_matched - update a port's matched variable from a received lacpdu
596 * @lacpdu: the lacpdu we've received
597 * @port: the port we're looking at
598 *
599 * Update the value of the matched variable, using parameter values from a
600 * newly received lacpdu. Parameter values for the partner carried in the
601 * received PDU are compared with the corresponding operational parameter
602 * values for the actor. Matched is set to TRUE if all of these parameters
603 * match and the PDU parameter partner_state.aggregation has the same value as
604 * actor_oper_port_state.aggregation and lacp will actively maintain the link
605 * in the aggregation. Matched is also set to TRUE if the value of
606 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
607 * an individual link and lacp will actively maintain the link. Otherwise,
608 * matched is set to FALSE. LACP is considered to be actively maintaining the
609 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
610 * the actor's actor_oper_port_state.lacp_activity and the PDU's
611 * partner_state.lacp_activity variables are TRUE.
612 */
613static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
614{
615 // validate lacpdu and port
616 if (lacpdu && port) {
617 // check if all parameters are alike
89cc76f9
JV		 618 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
619 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
1da177e4 620 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
89cc76f9
JV		 621 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
622 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
1da177e4
LT		 623 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
624 // or this is individual link(aggregation == FALSE)
625 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
626 ) {
627 // update the state machine Matched variable
628 port->sm_vars |= AD_PORT_MATCHED;
629 } else {
630 port->sm_vars &= ~AD_PORT_MATCHED;
631 }
632 }
633}
634
635/**
636 * __update_ntt - update a port's ntt variable from a received lacpdu
637 * @lacpdu: the lacpdu we've received
638 * @port: the port we're looking at
639 *
640 * Updates the value of the ntt variable, using parameter values from a newly
641 * received lacpdu. The parameter values for the partner carried in the
642 * received PDU are compared with the corresponding operational parameter
643 * values for the Actor. If one or more of the comparisons shows that the
644 * value(s) received in the PDU differ from the current operational values,
645 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
646 */
647static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
648{
649 // validate lacpdu and port
650 if (lacpdu && port) {
651 // check if any parameter is different
89cc76f9
JV		 652 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
653 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
1da177e4 654 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 655 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
656 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 657 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
658 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
659 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
660 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
661 ) {
662 // set ntt to be TRUE
663 port->ntt = 1;
664 }
665 }
666}
667
668/**
669 * __attach_bond_to_agg
670 * @port: the port we're looking at
671 *
672 * Handle the attaching of the port's control parser/multiplexer and the
673 * aggregator. This function does nothing since the parser/multiplexer of the
674 * receive and the parser/multiplexer of the aggregator are already combined.
675 */
676static void __attach_bond_to_agg(struct port *port)
677{
678 port=NULL; // just to satisfy the compiler
679 // This function does nothing since the parser/multiplexer of the receive
680 // and the parser/multiplexer of the aggregator are already combined
681}
682
683/**
684 * __detach_bond_from_agg
685 * @port: the port we're looking at
686 *
687 * Handle the detaching of the port's control parser/multiplexer from the
688 * aggregator. This function does nothing since the parser/multiplexer of the
689 * receive and the parser/multiplexer of the aggregator are already combined.
690 */
691static void __detach_bond_from_agg(struct port *port)
692{
693 port=NULL; // just to satisfy the compiler
694 // This function does nothing sience the parser/multiplexer of the receive
695 // and the parser/multiplexer of the aggregator are already combined
696}
697
698/**
699 * __agg_ports_are_ready - check if all ports in an aggregator are ready
700 * @aggregator: the aggregator we're looking at
701 *
702 */
703static int __agg_ports_are_ready(struct aggregator *aggregator)
704{
705 struct port *port;
706 int retval = 1;
707
708 if (aggregator) {
709 // scan all ports in this aggregator to verfy if they are all ready
710 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
711 if (!(port->sm_vars & AD_PORT_READY_N)) {
712 retval = 0;
713 break;
714 }
715 }
716 }
717
718 return retval;
719}
720
721/**
722 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
723 * @aggregator: the aggregator we're looking at
724 * @val: Should the ports' ready bit be set on or off
725 *
726 */
727static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
728{
729 struct port *port;
730
731 for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) {
732 if (val) {
733 port->sm_vars |= AD_PORT_READY;
734 } else {
735 port->sm_vars &= ~AD_PORT_READY;
736 }
737 }
738}
739
740/**
741 * __get_agg_bandwidth - get the total bandwidth of an aggregator
742 * @aggregator: the aggregator we're looking at
743 *
744 */
745static u32 __get_agg_bandwidth(struct aggregator *aggregator)
746{
747 u32 bandwidth=0;
748 u32 basic_speed;
749
750 if (aggregator->num_of_ports) {
751 basic_speed = __get_link_speed(aggregator->lag_ports);
752 switch (basic_speed) {
753 case AD_LINK_SPEED_BITMASK_1MBPS:
754 bandwidth = aggregator->num_of_ports;
755 break;
756 case AD_LINK_SPEED_BITMASK_10MBPS:
757 bandwidth = aggregator->num_of_ports * 10;
758 break;
759 case AD_LINK_SPEED_BITMASK_100MBPS:
760 bandwidth = aggregator->num_of_ports * 100;
761 break;
762 case AD_LINK_SPEED_BITMASK_1000MBPS:
763 bandwidth = aggregator->num_of_ports * 1000;
764 break;
94dbffd5
JV		 765 case AD_LINK_SPEED_BITMASK_10000MBPS:
766 bandwidth = aggregator->num_of_ports * 10000;
767 break;
1da177e4
LT		 768 default:
769 bandwidth=0; // to silent the compilor ....
770 }
771 }
772 return bandwidth;
773}
774
775/**
776 * __get_active_agg - get the current active aggregator
777 * @aggregator: the aggregator we're looking at
778 *
779 */
780static struct aggregator *__get_active_agg(struct aggregator *aggregator)
781{
782 struct aggregator *retval = NULL;
783
784 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
785 if (aggregator->is_active) {
786 retval = aggregator;
787 break;
788 }
789 }
790
791 return retval;
792}
793
794/**
795 * __update_lacpdu_from_port - update a port's lacpdu fields
796 * @port: the port we're looking at
797 *
798 */
799static inline void __update_lacpdu_from_port(struct port *port)
800{
801 struct lacpdu *lacpdu = &port->lacpdu;
802
803 /* update current actual Actor parameters */
804 /* lacpdu->subtype initialized
805 * lacpdu->version_number initialized
806 * lacpdu->tlv_type_actor_info initialized
807 * lacpdu->actor_information_length initialized
808 */
809
d3bb52b0 810 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 811 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 812 lacpdu->actor_key = htons(port->actor_oper_port_key);
813 lacpdu->actor_port_priority = htons(port->actor_port_priority);
814 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4
LT		 815 lacpdu->actor_state = port->actor_oper_port_state;
816
817 /* lacpdu->reserved_3_1 initialized
818 * lacpdu->tlv_type_partner_info initialized
819 * lacpdu->partner_information_length initialized
820 */
821
d3bb52b0 822 lacpdu->partner_system_priority = htons(port->partner_oper_system_priority);
1da177e4 823 lacpdu->partner_system = port->partner_oper_system;
d3bb52b0
AV		 824 lacpdu->partner_key = htons(port->partner_oper_key);
825 lacpdu->partner_port_priority = htons(port->partner_oper_port_priority);
826 lacpdu->partner_port = htons(port->partner_oper_port_number);
1da177e4
LT		 827 lacpdu->partner_state = port->partner_oper_port_state;
828
829 /* lacpdu->reserved_3_2 initialized
830 * lacpdu->tlv_type_collector_info initialized
831 * lacpdu->collector_information_length initialized
832 * collector_max_delay initialized
833 * reserved_12[12] initialized
834 * tlv_type_terminator initialized
835 * terminator_length initialized
836 * reserved_50[50] initialized
837 */
1da177e4
LT		 838}
839
840//////////////////////////////////////////////////////////////////////////////////////
841// ================= main 802.3ad protocol code ======================================
842//////////////////////////////////////////////////////////////////////////////////////
843
844/**
845 * ad_lacpdu_send - send out a lacpdu packet on a given port
846 * @port: the port we're looking at
847 *
848 * Returns: 0 on success
849 * < 0 on error
850 */
851static int ad_lacpdu_send(struct port *port)
852{
853 struct slave *slave = port->slave;
854 struct sk_buff *skb;
855 struct lacpdu_header *lacpdu_header;
856 int length = sizeof(struct lacpdu_header);
857 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
858
859 skb = dev_alloc_skb(length);
860 if (!skb) {
861 return -ENOMEM;
862 }
863
864 skb->dev = slave->dev;
459a98ed 865 skb_reset_mac_header(skb);
b0e380b1 866 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 867 skb->protocol = PKT_TYPE_LACPDU;
868 skb->priority = TC_PRIO_CONTROL;
869
870 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
871
872 lacpdu_header->ad_header.destination_address = lacpdu_multicast_address;
873 /* Note: source addres is set to be the member's PERMANENT address, because we use it
874 to identify loopback lacpdus in receive. */
875 lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
876 lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU;
877
878 lacpdu_header->lacpdu = port->lacpdu; // struct copy
879
880 dev_queue_xmit(skb);
881
882 return 0;
883}
884
885/**
886 * ad_marker_send - send marker information/response on a given port
887 * @port: the port we're looking at
888 * @marker: marker data to send
889 *
890 * Returns: 0 on success
891 * < 0 on error
892 */
1c3f0b8e 893static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 894{
895 struct slave *slave = port->slave;
896 struct sk_buff *skb;
1c3f0b8e
MD		 897 struct bond_marker_header *marker_header;
898 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 899 struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR;
900
901 skb = dev_alloc_skb(length + 16);
902 if (!skb) {
903 return -ENOMEM;
904 }
905
906 skb_reserve(skb, 16);
907
908 skb->dev = slave->dev;
459a98ed 909 skb_reset_mac_header(skb);
b0e380b1 910 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 911 skb->protocol = PKT_TYPE_LACPDU;
912
1c3f0b8e 913 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4
LT		 914
915 marker_header->ad_header.destination_address = lacpdu_multicast_address;
916 /* Note: source addres is set to be the member's PERMANENT address, because we use it
917 to identify loopback MARKERs in receive. */
918 marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr));
919 marker_header->ad_header.length_type = PKT_TYPE_LACPDU;
920
921 marker_header->marker = *marker; // struct copy
922
923 dev_queue_xmit(skb);
924
925 return 0;
926}
927
928/**
929 * ad_mux_machine - handle a port's mux state machine
930 * @port: the port we're looking at
931 *
932 */
933static void ad_mux_machine(struct port *port)
934{
935 mux_states_t last_state;
936
937 // keep current State Machine state to compare later if it was changed
938 last_state = port->sm_mux_state;
939
940 if (port->sm_vars & AD_PORT_BEGIN) {
941 port->sm_mux_state = AD_MUX_DETACHED; // next state
942 } else {
943 switch (port->sm_mux_state) {
944 case AD_MUX_DETACHED:
945 if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY
946 port->sm_mux_state = AD_MUX_WAITING; // next state
947 }
948 break;
949 case AD_MUX_WAITING:
950 // if SELECTED == FALSE return to DETACH state
951 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
952 port->sm_vars &= ~AD_PORT_READY_N;
953 // in order to withhold the Selection Logic to check all ports READY_N value
954 // every callback cycle to update ready variable, we check READY_N and update READY here
955 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
956 port->sm_mux_state = AD_MUX_DETACHED; // next state
957 break;
958 }
959
960 // check if the wait_while_timer expired
961 if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) {
962 port->sm_vars |= AD_PORT_READY_N;
963 }
964
965 // in order to withhold the selection logic to check all ports READY_N value
966 // every callback cycle to update ready variable, we check READY_N and update READY here
967 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
968
969 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
970 if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) {
971 port->sm_mux_state = AD_MUX_ATTACHED; // next state
972 }
973 break;
974 case AD_MUX_ATTACHED:
975 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
976 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
977 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
978 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
979 port->sm_vars &= ~AD_PORT_READY_N;
980 // in order to withhold the selection logic to check all ports READY_N value
981 // every callback cycle to update ready variable, we check READY_N and update READY here
982 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
983 port->sm_mux_state = AD_MUX_DETACHED;// next state
984 }
985 break;
986 case AD_MUX_COLLECTING_DISTRIBUTING:
987 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
988 !(port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION)
989 ) {
990 port->sm_mux_state = AD_MUX_ATTACHED;// next state
991
992 } else {
993 // if port state hasn't changed make
994 // sure that a collecting distributing
995 // port in an active aggregator is enabled
996 if (port->aggregator &&
997 port->aggregator->is_active &&
998 !__port_is_enabled(port)) {
999
1000 __enable_port(port);
1001 }
1002 }
1003 break;
1004 default: //to silence the compiler
1005 break;
1006 }
1007 }
1008
1009 // check if the state machine was changed
1010 if (port->sm_mux_state != last_state) {
5a03cdb7 1011 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		 1012 switch (port->sm_mux_state) {
1013 case AD_MUX_DETACHED:
1014 __detach_bond_from_agg(port);
1015 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1016 ad_disable_collecting_distributing(port);
1017 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1018 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1019 port->ntt = 1;
1020 break;
1021 case AD_MUX_WAITING:
1022 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1023 break;
1024 case AD_MUX_ATTACHED:
1025 __attach_bond_to_agg(port);
1026 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1027 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1028 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1029 ad_disable_collecting_distributing(port);
1030 port->ntt = 1;
1031 break;
1032 case AD_MUX_COLLECTING_DISTRIBUTING:
1033 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1034 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1035 ad_enable_collecting_distributing(port);
1036 port->ntt = 1;
1037 break;
1038 default: //to silence the compiler
1039 break;
1040 }
1041 }
1042}
1043
1044/**
1045 * ad_rx_machine - handle a port's rx State Machine
1046 * @lacpdu: the lacpdu we've received
1047 * @port: the port we're looking at
1048 *
1049 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1050 * CURRENT. If timer expired set the state machine in the proper state.
1051 * In other cases, this function checks if we need to switch to other state.
1052 */
1053static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1054{
1055 rx_states_t last_state;
1056
1057 // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback)
1058 __get_rx_machine_lock(port);
1059
1060 // keep current State Machine state to compare later if it was changed
1061 last_state = port->sm_rx_state;
1062
1063 // check if state machine should change state
1064 // first, check if port was reinitialized
1065 if (port->sm_vars & AD_PORT_BEGIN) {
1066 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1067 }
1068 // check if port is not enabled
1069 else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) {
1070 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1071 }
1072 // check if new lacpdu arrived
1073 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1074 port->sm_rx_timer_counter = 0; // zero timer
1075 port->sm_rx_state = AD_RX_CURRENT;
1076 } else {
1077 // if timer is on, and if it is expired
1078 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1079 switch (port->sm_rx_state) {
1080 case AD_RX_EXPIRED:
1081 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1082 break;
1083 case AD_RX_CURRENT:
1084 port->sm_rx_state = AD_RX_EXPIRED; // next state
1085 break;
1086 default: //to silence the compiler
1087 break;
1088 }
1089 } else {
1090 // if no lacpdu arrived and no timer is on
1091 switch (port->sm_rx_state) {
1092 case AD_RX_PORT_DISABLED:
1093 if (port->sm_vars & AD_PORT_MOVED) {
1094 port->sm_rx_state = AD_RX_INITIALIZE; // next state
1095 } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1096 port->sm_rx_state = AD_RX_EXPIRED; // next state
1097 } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) {
1098 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1099 }
1100 break;
1101 default: //to silence the compiler
1102 break;
1103
1104 }
1105 }
1106 }
1107
1108 // check if the State machine was changed or new lacpdu arrived
1109 if ((port->sm_rx_state != last_state) || (lacpdu)) {
5a03cdb7 1110 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		 1111 switch (port->sm_rx_state) {
1112 case AD_RX_INITIALIZE:
1113 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1114 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1115 } else {
1116 port->sm_vars |= AD_PORT_LACP_ENABLED;
1117 }
1118 port->sm_vars &= ~AD_PORT_SELECTED;
1119 __record_default(port);
1120 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1121 port->sm_vars &= ~AD_PORT_MOVED;
1122 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1123
1124 /*- Fall Through -*/
1125
1126 case AD_RX_PORT_DISABLED:
1127 port->sm_vars &= ~AD_PORT_MATCHED;
1128 break;
1129 case AD_RX_LACP_DISABLED:
1130 port->sm_vars &= ~AD_PORT_SELECTED;
1131 __record_default(port);
1132 port->partner_oper_port_state &= ~AD_STATE_AGGREGATION;
1133 port->sm_vars |= AD_PORT_MATCHED;
1134 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1135 break;
1136 case AD_RX_EXPIRED:
1137 //Reset of the Synchronization flag. (Standard 43.4.12)
1138 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1139 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1140 port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
1141 port->sm_vars &= ~AD_PORT_MATCHED;
1142 port->partner_oper_port_state |= AD_SHORT_TIMEOUT;
1143 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1144 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1145 break;
1146 case AD_RX_DEFAULTED:
1147 __update_default_selected(port);
1148 __record_default(port);
1149 port->sm_vars |= AD_PORT_MATCHED;
1150 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1151 break;
1152 case AD_RX_CURRENT:
1153 // detect loopback situation
1154 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1155 // INFO_RECEIVED_LOOPBACK_FRAMES
4e0952c7
MW		 1156 printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on "
1157 "adapter (%s). Check the configuration to verify that all "
1158 "Adapters are connected to 802.3ad compliant switch ports\n",
1159 port->slave->dev->master->name, port->slave->dev->name);
1da177e4
LT		 1160 __release_rx_machine_lock(port);
1161 return;
1162 }
1163 __update_selected(lacpdu, port);
1164 __update_ntt(lacpdu, port);
1165 __record_pdu(lacpdu, port);
1166 __choose_matched(lacpdu, port);
1167 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1168 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1169 // verify that if the aggregator is enabled, the port is enabled too.
1170 //(because if the link goes down for a short time, the 802.3ad will not
1171 // catch it, and the port will continue to be disabled)
1172 if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) {
1173 __enable_port(port);
1174 }
1175 break;
1176 default: //to silence the compiler
1177 break;
1178 }
1179 }
1180 __release_rx_machine_lock(port);
1181}
1182
1183/**
1184 * ad_tx_machine - handle a port's tx state machine
1185 * @port: the port we're looking at
1186 *
1187 */
1188static void ad_tx_machine(struct port *port)
1189{
1190 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1191 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1192 // check if there is something to send
1193 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1194 __update_lacpdu_from_port(port);
1195 // send the lacpdu
1196 if (ad_lacpdu_send(port) >= 0) {
5a03cdb7 1197 pr_debug("Sent LACPDU on port %d\n", port->actor_port_number);
1da177e4
LT		 1198 // mark ntt as false, so it will not be sent again until demanded
1199 port->ntt = 0;
1200 }
1201 }
1202 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
1203 port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1204 }
1205}
1206
1207/**
1208 * ad_periodic_machine - handle a port's periodic state machine
1209 * @port: the port we're looking at
1210 *
1211 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1212 */
1213static void ad_periodic_machine(struct port *port)
1214{
1215 periodic_states_t last_state;
1216
1217 // keep current state machine state to compare later if it was changed
1218 last_state = port->sm_periodic_state;
1219
1220 // check if port was reinitialized
1221 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1222 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper_port_state & AD_STATE_LACP_ACTIVITY))
1223 ) {
1224 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1225 }
1226 // check if state machine should change state
1227 else if (port->sm_periodic_timer_counter) {
1228 // check if periodic state machine expired
1229 if (!(--port->sm_periodic_timer_counter)) {
1230 // if expired then do tx
1231 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1232 } else {
1233 // If not expired, check if there is some new timeout parameter from the partner state
1234 switch (port->sm_periodic_state) {
1235 case AD_FAST_PERIODIC:
1236 if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
1237 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1238 }
1239 break;
1240 case AD_SLOW_PERIODIC:
1241 if ((port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
1242 // stop current timer
1243 port->sm_periodic_timer_counter = 0;
1244 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1245 }
1246 break;
1247 default: //to silence the compiler
1248 break;
1249 }
1250 }
1251 } else {
1252 switch (port->sm_periodic_state) {
1253 case AD_NO_PERIODIC:
1254 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1255 break;
1256 case AD_PERIODIC_TX:
1257 if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) {
1258 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1259 } else {
1260 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1261 }
1262 break;
1263 default: //to silence the compiler
1264 break;
1265 }
1266 }
1267
1268 // check if the state machine was changed
1269 if (port->sm_periodic_state != last_state) {
5a03cdb7 1270 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		 1271 switch (port->sm_periodic_state) {
1272 case AD_NO_PERIODIC:
1273 port->sm_periodic_timer_counter = 0; // zero timer
1274 break;
1275 case AD_FAST_PERIODIC:
1276 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
1277 break;
1278 case AD_SLOW_PERIODIC:
1279 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
1280 break;
1281 case AD_PERIODIC_TX:
1282 port->ntt = 1;
1283 break;
1284 default: //to silence the compiler
1285 break;
1286 }
1287 }
1288}
1289
1290/**
1291 * ad_port_selection_logic - select aggregation groups
1292 * @port: the port we're looking at
1293 *
1294 * Select aggregation groups, and assign each port for it's aggregetor. The
1295 * selection logic is called in the inititalization (after all the handshkes),
1296 * and after every lacpdu receive (if selected is off).
1297 */
1298static void ad_port_selection_logic(struct port *port)
1299{
1300 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1301 struct port *last_port = NULL, *curr_port;
1302 int found = 0;
1303
1304 // if the port is already Selected, do nothing
1305 if (port->sm_vars & AD_PORT_SELECTED) {
1306 return;
1307 }
1308
1309 // if the port is connected to other aggregator, detach it
1310 if (port->aggregator) {
1311 // detach the port from its former aggregator
1312 temp_aggregator=port->aggregator;
1313 for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) {
1314 if (curr_port == port) {
1315 temp_aggregator->num_of_ports--;
1316 if (!last_port) {// if it is the first port attached to the aggregator
1317 temp_aggregator->lag_ports=port->next_port_in_aggregator;
1318 } else {// not the first port attached to the aggregator
1319 last_port->next_port_in_aggregator=port->next_port_in_aggregator;
1320 }
1321
1322 // clear the port's relations to this aggregator
1323 port->aggregator = NULL;
1324 port->next_port_in_aggregator=NULL;
1325 port->actor_port_aggregator_identifier=0;
1326
5a03cdb7 1327 pr_debug("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier);
1da177e4
LT		 1328 // if the aggregator is empty, clear its parameters, and set it ready to be attached
1329 if (!temp_aggregator->lag_ports) {
1330 ad_clear_agg(temp_aggregator);
1331 }
1332 break;
1333 }
1334 }
1335 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
4e0952c7 1336 printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was "
1da177e4 1337 "related to aggregator %d but was not on its port list\n",
4e0952c7 1338 port->slave->dev->master->name,
1da177e4
LT		 1339 port->actor_port_number, port->slave->dev->name,
1340 port->aggregator->aggregator_identifier);
1341 }
1342 }
1343 // search on all aggregators for a suitable aggregator for this port
1344 for (aggregator = __get_first_agg(port); aggregator;
1345 aggregator = __get_next_agg(aggregator)) {
1346
1347 // keep a free aggregator for later use(if needed)
1348 if (!aggregator->lag_ports) {
1349 if (!free_aggregator) {
1350 free_aggregator=aggregator;
1351 }
1352 continue;
1353 }
1354 // check if current aggregator suits us
1355 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1356 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper_system)) &&
1357 (aggregator->partner_system_priority == port->partner_oper_system_priority) &&
1358 (aggregator->partner_oper_aggregator_key == port->partner_oper_key)
1359 ) &&
1360 ((MAC_ADDRESS_COMPARE(&(port->partner_oper_system), &(null_mac_addr)) && // partner answers
1361 !aggregator->is_individual) // but is not individual OR
1362 )
1363 ) {
1364 // attach to the founded aggregator
1365 port->aggregator = aggregator;
1366 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1367 port->next_port_in_aggregator=aggregator->lag_ports;
1368 port->aggregator->num_of_ports++;
1369 aggregator->lag_ports=port;
5a03cdb7 1370 pr_debug("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4
LT		 1371
1372 // mark this port as selected
1373 port->sm_vars |= AD_PORT_SELECTED;
1374 found = 1;
1375 break;
1376 }
1377 }
1378
1379 // the port couldn't find an aggregator - attach it to a new aggregator
1380 if (!found) {
1381 if (free_aggregator) {
1382 // assign port a new aggregator
1383 port->aggregator = free_aggregator;
1384 port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier;
1385
1386 // update the new aggregator's parameters
1387 // if port was responsed from the end-user
1388 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex
1389 port->aggregator->is_individual = 0;
1390 } else {
1391 port->aggregator->is_individual = 1;
1392 }
1393
1394 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1395 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
1396 port->aggregator->partner_system=port->partner_oper_system;
1397 port->aggregator->partner_system_priority = port->partner_oper_system_priority;
1398 port->aggregator->partner_oper_aggregator_key = port->partner_oper_key;
1399 port->aggregator->receive_state = 1;
1400 port->aggregator->transmit_state = 1;
1401 port->aggregator->lag_ports = port;
1402 port->aggregator->num_of_ports++;
1403
1404 // mark this port as selected
1405 port->sm_vars |= AD_PORT_SELECTED;
1406
5a03cdb7 1407 pr_debug("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4 1408 } else {
4e0952c7
MW		 1409 printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n",
1410 port->slave->dev->master->name,
1da177e4
LT		 1411 port->actor_port_number, port->slave->dev->name);
1412 }
1413 }
1414 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1415 // else set ready=FALSE in all aggregator's ports
1416 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1417
fd989c83
JV		 1418 aggregator = __get_first_agg(port);
1419 ad_agg_selection_logic(aggregator);
1420}
1421
1422/*
1423 * Decide if "agg" is a better choice for the new active aggregator that
1424 * the current best, according to the ad_select policy.
1425 */
1426static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1427 struct aggregator *curr)
1428{
1429 /*
1430 * 0. If no best, select current.
1431 *
1432 * 1. If the current agg is not individual, and the best is
1433 * individual, select current.
1434 *
1435 * 2. If current agg is individual and the best is not, keep best.
1436 *
1437 * 3. Therefore, current and best are both individual or both not
1438 * individual, so:
1439 *
1440 * 3a. If current agg partner replied, and best agg partner did not,
1441 * select current.
1442 *
1443 * 3b. If current agg partner did not reply and best agg partner
1444 * did reply, keep best.
1445 *
1446 * 4. Therefore, current and best both have partner replies or
1447 * both do not, so perform selection policy:
1448 *
1449 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1450 * select by bandwidth.
1451 *
1452 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1453 */
1454 if (!best)
1455 return curr;
1456
1457 if (!curr->is_individual && best->is_individual)
1458 return curr;
1459
1460 if (curr->is_individual && !best->is_individual)
1461 return best;
1462
1463 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1464 return curr;
1465
1466 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1467 return best;
1468
1469 switch (__get_agg_selection_mode(curr->lag_ports)) {
1470 case BOND_AD_COUNT:
1471 if (curr->num_of_ports > best->num_of_ports)
1472 return curr;
1473
1474 if (curr->num_of_ports < best->num_of_ports)
1475 return best;
1476
1477 /*FALLTHROUGH*/
1478 case BOND_AD_STABLE:
1479 case BOND_AD_BANDWIDTH:
1480 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1481 return curr;
1482
1483 break;
1484
1485 default:
1486 printk(KERN_WARNING DRV_NAME
1487 ": %s: Impossible agg select mode %d\n",
1488 curr->slave->dev->master->name,
1489 __get_agg_selection_mode(curr->lag_ports));
1490 break;
1da177e4 1491 }
fd989c83
JV		 1492
1493 return best;
1da177e4
LT		 1494}
1495
1496/**
1497 * ad_agg_selection_logic - select an aggregation group for a team
1498 * @aggregator: the aggregator we're looking at
1499 *
1500 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1501 *
1502 * The logic of this function is to select the aggregator according to
1503 * the ad_select policy:
1504 *
1505 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1506 * it, and to reselect the active aggregator only if the previous
1507 * aggregator has no more ports related to it.
1508 *
1509 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1510 * bandwidth, and reselect whenever a link state change takes place or the
1511 * set of slaves in the bond changes.
1512 *
1513 * BOND_AD_COUNT: select the aggregator with largest number of ports
1514 * (slaves), and reselect whenever a link state change takes place or the
1515 * set of slaves in the bond changes.
1da177e4
LT		 1516 *
1517 * FIXME: this function MUST be called with the first agg in the bond, or
1518 * __get_active_agg() won't work correctly. This function should be better
1519 * called with the bond itself, and retrieve the first agg from it.
1520 */
fd989c83 1521static void ad_agg_selection_logic(struct aggregator *agg)
1da177e4 1522{
fd989c83 1523 struct aggregator *best, *active, *origin;
1da177e4 1524 struct port *port;
1da177e4 1525
fd989c83 1526 origin = agg;
1da177e4 1527
fd989c83
JV		 1528 active = __get_active_agg(agg);
1529 best = active;
1da177e4 1530
1da177e4 1531 do {
fd989c83
JV		 1532 agg->is_active = 0;
1533
1534 if (agg->num_of_ports)
1535 best = ad_agg_selection_test(best, agg);
1536
1537 } while ((agg = __get_next_agg(agg)));
1538
1539 if (best &&
1540 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1541 /*
1542 * For the STABLE policy, don't replace the old active
1543 * aggregator if it's still active (it has an answering
1544 * partner) or if both the best and active don't have an
1545 * answering partner.
1546 */
1547 if (active && active->lag_ports &&
1548 active->lag_ports->is_enabled &&
1549 (__agg_has_partner(active) ||
1550 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1551 if (!(!active->actor_oper_aggregator_key &&
1552 best->actor_oper_aggregator_key)) {
1553 best = NULL;
1554 active->is_active = 1;
1da177e4
LT		 1555 }
1556 }
fd989c83 1557 }
1da177e4 1558
fd989c83
JV		 1559 if (best && (best == active)) {
1560 best = NULL;
1561 active->is_active = 1;
1da177e4
LT		 1562 }
1563
1564 // if there is new best aggregator, activate it
fd989c83 1565 if (best) {
5a03cdb7 1566 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
fd989c83
JV		 1567 best->aggregator_identifier, best->num_of_ports,
1568 best->actor_oper_aggregator_key,
1569 best->partner_oper_aggregator_key,
1570 best->is_individual, best->is_active);
5a03cdb7 1571 pr_debug("best ports %p slave %p %s\n",
fd989c83
JV		 1572 best->lag_ports, best->slave,
1573 best->slave ? best->slave->dev->name : "NULL");
1574
1575 for (agg = __get_first_agg(best->lag_ports); agg;
1576 agg = __get_next_agg(agg)) {
1577
5a03cdb7 1578 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
fd989c83
JV		 1579 agg->aggregator_identifier, agg->num_of_ports,
1580 agg->actor_oper_aggregator_key,
1581 agg->partner_oper_aggregator_key,
1582 agg->is_individual, agg->is_active);
1da177e4
LT		 1583 }
1584
1585 // check if any partner replys
fd989c83
JV		 1586 if (best->is_individual) {
1587 printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad"
1588 " response from the link partner for any"
1589 " adapters in the bond\n",
1590 best->slave->dev->master->name);
1da177e4
LT		 1591 }
1592
fd989c83 1593 best->is_active = 1;
5a03cdb7 1594 pr_debug("LAG %d chosen as the active LAG\n",
fd989c83 1595 best->aggregator_identifier);
5a03cdb7 1596 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
fd989c83
JV		 1597 best->aggregator_identifier, best->num_of_ports,
1598 best->actor_oper_aggregator_key,
1599 best->partner_oper_aggregator_key,
1600 best->is_individual, best->is_active);
1da177e4
LT		 1601
1602 // disable the ports that were related to the former active_aggregator
fd989c83
JV		 1603 if (active) {
1604 for (port = active->lag_ports; port;
1605 port = port->next_port_in_aggregator) {
1da177e4
LT		 1606 __disable_port(port);
1607 }
1608 }
1609 }
1610
fd989c83
JV		 1611 /*
1612 * if the selected aggregator is of join individuals
1613 * (partner_system is NULL), enable their ports
1614 */
1615 active = __get_active_agg(origin);
1da177e4 1616
fd989c83
JV		 1617 if (active) {
1618 if (!__agg_has_partner(active)) {
1619 for (port = active->lag_ports; port;
1620 port = port->next_port_in_aggregator) {
1da177e4
LT		 1621 __enable_port(port);
1622 }
1623 }
1624 }
fd989c83
JV		 1625
1626 if (origin->slave) {
1627 struct bonding *bond;
1628
1629 bond = bond_get_bond_by_slave(origin->slave);
1630 if (bond)
1631 bond_3ad_set_carrier(bond);
1632 }
1da177e4
LT		 1633}
1634
1635/**
1636 * ad_clear_agg - clear a given aggregator's parameters
1637 * @aggregator: the aggregator we're looking at
1638 *
1639 */
1640static void ad_clear_agg(struct aggregator *aggregator)
1641{
1642 if (aggregator) {
1643 aggregator->is_individual = 0;
1644 aggregator->actor_admin_aggregator_key = 0;
1645 aggregator->actor_oper_aggregator_key = 0;
1646 aggregator->partner_system = null_mac_addr;
1647 aggregator->partner_system_priority = 0;
1648 aggregator->partner_oper_aggregator_key = 0;
1649 aggregator->receive_state = 0;
1650 aggregator->transmit_state = 0;
1651 aggregator->lag_ports = NULL;
1652 aggregator->is_active = 0;
1653 aggregator->num_of_ports = 0;
5a03cdb7 1654 pr_debug("LAG %d was cleared\n", aggregator->aggregator_identifier);
1da177e4
LT		 1655 }
1656}
1657
1658/**
1659 * ad_initialize_agg - initialize a given aggregator's parameters
1660 * @aggregator: the aggregator we're looking at
1661 *
1662 */
1663static void ad_initialize_agg(struct aggregator *aggregator)
1664{
1665 if (aggregator) {
1666 ad_clear_agg(aggregator);
1667
1668 aggregator->aggregator_mac_address = null_mac_addr;
1669 aggregator->aggregator_identifier = 0;
1670 aggregator->slave = NULL;
1671 }
1672}
1673
1674/**
1675 * ad_initialize_port - initialize a given port's parameters
1676 * @aggregator: the aggregator we're looking at
1677 * @lacp_fast: boolean. whether fast periodic should be used
1678 *
1679 */
1680static void ad_initialize_port(struct port *port, int lacp_fast)
1681{
1682 if (port) {
1683 port->actor_port_number = 1;
1684 port->actor_port_priority = 0xff;
1685 port->actor_system = null_mac_addr;
1686 port->actor_system_priority = 0xffff;
1687 port->actor_port_aggregator_identifier = 0;
1688 port->ntt = 0;
1689 port->actor_admin_port_key = 1;
1690 port->actor_oper_port_key = 1;
1691 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1692 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1693
1694 if (lacp_fast) {
1695 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1696 }
1697
1698 port->partner_admin_system = null_mac_addr;
1699 port->partner_oper_system = null_mac_addr;
1700 port->partner_admin_system_priority = 0xffff;
1701 port->partner_oper_system_priority = 0xffff;
1702 port->partner_admin_key = 1;
1703 port->partner_oper_key = 1;
1704 port->partner_admin_port_number = 1;
1705 port->partner_oper_port_number = 1;
1706 port->partner_admin_port_priority = 0xff;
1707 port->partner_oper_port_priority = 0xff;
1708 port->partner_admin_port_state = 1;
1709 port->partner_oper_port_state = 1;
1710 port->is_enabled = 1;
1711 // ****** private parameters ******
1712 port->sm_vars = 0x3;
1713 port->sm_rx_state = 0;
1714 port->sm_rx_timer_counter = 0;
1715 port->sm_periodic_state = 0;
1716 port->sm_periodic_timer_counter = 0;
1717 port->sm_mux_state = 0;
1718 port->sm_mux_timer_counter = 0;
1719 port->sm_tx_state = 0;
1720 port->sm_tx_timer_counter = 0;
1721 port->slave = NULL;
1722 port->aggregator = NULL;
1723 port->next_port_in_aggregator = NULL;
1724 port->transaction_id = 0;
1725
1726 ad_initialize_lacpdu(&(port->lacpdu));
1727 }
1728}
1729
1730/**
1731 * ad_enable_collecting_distributing - enable a port's transmit/receive
1732 * @port: the port we're looking at
1733 *
1734 * Enable @port if it's in an active aggregator
1735 */
1736static void ad_enable_collecting_distributing(struct port *port)
1737{
1738 if (port->aggregator->is_active) {
5a03cdb7 1739 pr_debug("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4
LT		 1740 __enable_port(port);
1741 }
1742}
1743
1744/**
1745 * ad_disable_collecting_distributing - disable a port's transmit/receive
1746 * @port: the port we're looking at
1747 *
1748 */
1749static void ad_disable_collecting_distributing(struct port *port)
1750{
1751 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
5a03cdb7 1752 pr_debug("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier);
1da177e4
LT		 1753 __disable_port(port);
1754 }
1755}
1756
1757#if 0
1758/**
1759 * ad_marker_info_send - send a marker information frame
1760 * @port: the port we're looking at
1761 *
1762 * This function does nothing since we decided not to implement send and handle
1763 * response for marker PDU's, in this stage, but only to respond to marker
1764 * information.
1765 */
1766static void ad_marker_info_send(struct port *port)
1767{
1c3f0b8e 1768 struct bond_marker marker;
1da177e4
LT		 1769 u16 index;
1770
1771 // fill the marker PDU with the appropriate values
1772 marker.subtype = 0x02;
1773 marker.version_number = 0x01;
1774 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1775 marker.marker_length = 0x16;
1776 // convert requester_port to Big Endian
1777 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1778 marker.requester_system = port->actor_system;
1779 // convert requester_port(u32) to Big Endian
1780 marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24));
1781 marker.pad = 0;
1782 marker.tlv_type_terminator = 0x00;
1783 marker.terminator_length = 0x00;
1784 for (index=0; index<90; index++) {
1785 marker.reserved_90[index]=0;
1786 }
1787
1788 // send the marker information
1789 if (ad_marker_send(port, &marker) >= 0) {
5a03cdb7 1790 pr_debug("Sent Marker Information on port %d\n", port->actor_port_number);
1da177e4
LT		 1791 }
1792}
1793#endif
1794
1795/**
1796 * ad_marker_info_received - handle receive of a Marker information frame
1797 * @marker_info: Marker info received
1798 * @port: the port we're looking at
1799 *
1800 */
1c3f0b8e
MD		 1801static void ad_marker_info_received(struct bond_marker *marker_info,
1802 struct port *port)
1da177e4 1803{
1c3f0b8e 1804 struct bond_marker marker;
1da177e4
LT		 1805
1806 // copy the received marker data to the response marker
1807 //marker = *marker_info;
1c3f0b8e 1808 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1da177e4
LT		 1809 // change the marker subtype to marker response
1810 marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE;
1811 // send the marker response
1812
1813 if (ad_marker_send(port, &marker) >= 0) {
5a03cdb7 1814 pr_debug("Sent Marker Response on port %d\n", port->actor_port_number);
1da177e4
LT		 1815 }
1816}
1817
1818/**
1819 * ad_marker_response_received - handle receive of a marker response frame
1820 * @marker: marker PDU received
1821 * @port: the port we're looking at
1822 *
1823 * This function does nothing since we decided not to implement send and handle
1824 * response for marker PDU's, in this stage, but only to respond to marker
1825 * information.
1826 */
1c3f0b8e
MD		 1827static void ad_marker_response_received(struct bond_marker *marker,
1828 struct port *port)
1da177e4
LT		 1829{
1830 marker=NULL; // just to satisfy the compiler
1831 port=NULL; // just to satisfy the compiler
1832 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1833}
1834
1835/**
1836 * ad_initialize_lacpdu - initialize a given lacpdu structure
1837 * @lacpdu: lacpdu structure to initialize
1838 *
1839 */
1840static void ad_initialize_lacpdu(struct lacpdu *lacpdu)
1841{
1842 u16 index;
1843
1844 // initialize lacpdu data
1845 lacpdu->subtype = 0x01;
1846 lacpdu->version_number = 0x01;
1847 lacpdu->tlv_type_actor_info = 0x01;
1848 lacpdu->actor_information_length = 0x14;
1849 // lacpdu->actor_system_priority updated on send
1850 // lacpdu->actor_system updated on send
1851 // lacpdu->actor_key updated on send
1852 // lacpdu->actor_port_priority updated on send
1853 // lacpdu->actor_port updated on send
1854 // lacpdu->actor_state updated on send
1855 lacpdu->tlv_type_partner_info = 0x02;
1856 lacpdu->partner_information_length = 0x14;
1857 for (index=0; index<=2; index++) {
1858 lacpdu->reserved_3_1[index]=0;
1859 }
1860 // lacpdu->partner_system_priority updated on send
1861 // lacpdu->partner_system updated on send
1862 // lacpdu->partner_key updated on send
1863 // lacpdu->partner_port_priority updated on send
1864 // lacpdu->partner_port updated on send
1865 // lacpdu->partner_state updated on send
1866 for (index=0; index<=2; index++) {
1867 lacpdu->reserved_3_2[index]=0;
1868 }
1869 lacpdu->tlv_type_collector_info = 0x03;
1870 lacpdu->collector_information_length= 0x10;
d3bb52b0 1871 lacpdu->collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY);
1da177e4
LT		 1872 for (index=0; index<=11; index++) {
1873 lacpdu->reserved_12[index]=0;
1874 }
1875 lacpdu->tlv_type_terminator = 0x00;
1876 lacpdu->terminator_length = 0;
1877 for (index=0; index<=49; index++) {
1878 lacpdu->reserved_50[index]=0;
1879 }
1880}
1881
1882//////////////////////////////////////////////////////////////////////////////////////
1883// ================= AD exported functions to the main bonding code ==================
1884//////////////////////////////////////////////////////////////////////////////////////
1885
1886// Check aggregators status in team every T seconds
1887#define AD_AGGREGATOR_SELECTION_TIMER 8
1888
fd989c83
JV		 1889/*
1890 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1891 *
1892 * Set the aggregation selection timer, to initiate an agg selection in
1893 * the very near future. Called during first initialization, and during
1894 * any down to up transitions of the bond.
1895 */
1896void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1897{
1898 BOND_AD_INFO(bond).agg_select_timer = timeout;
1899 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select;
1900}
1901
1da177e4
LT		 1902static u16 aggregator_identifier;
1903
1904/**
1905 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1906 * @bond: bonding struct to work on
1907 * @tick_resolution: tick duration (millisecond resolution)
1908 * @lacp_fast: boolean. whether fast periodic should be used
1909 *
1910 * Can be called only after the mac address of the bond is set.
1911 */
1912void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
1913{
1914 // check that the bond is not initialized yet
1915 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) {
1916
1917 aggregator_identifier = 0;
1918
1919 BOND_AD_INFO(bond).lacp_fast = lacp_fast;
1920 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1921 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1922
1923 // initialize how many times this module is called in one second(should be about every 100ms)
1924 ad_ticks_per_sec = tick_resolution;
1925
fd989c83
JV		 1926 bond_3ad_initiate_agg_selection(bond,
1927 AD_AGGREGATOR_SELECTION_TIMER *
1928 ad_ticks_per_sec);
1da177e4
LT		 1929 }
1930}
1931
1932/**
1933 * bond_3ad_bind_slave - initialize a slave's port
1934 * @slave: slave struct to work on
1935 *
1936 * Returns: 0 on success
1937 * < 0 on error
1938 */
1939int bond_3ad_bind_slave(struct slave *slave)
1940{
1941 struct bonding *bond = bond_get_bond_by_slave(slave);
1942 struct port *port;
1943 struct aggregator *aggregator;
1944
1945 if (bond == NULL) {
4e0952c7
MW		 1946 printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n",
1947 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 1948 return -1;
1949 }
1950
1951 //check that the slave has not been intialized yet.
1952 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1953
1954 // port initialization
1955 port = &(SLAVE_AD_INFO(slave).port);
1956
1957 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
1958
1959 port->slave = slave;
1960 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1961 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1962 // ------------------------------------------------------------
1963 // Port key : | User key | Speed |Duplex|
1964 // ------------------------------------------------------------
1965 // 16 6 1 0
1966 port->actor_admin_port_key = 0; // initialize this parameter
1967 port->actor_admin_port_key |= __get_duplex(port);
1968 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1969 port->actor_oper_port_key = port->actor_admin_port_key;
1970 // if the port is not full duplex, then the port should be not lacp Enabled
1971 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) {
1972 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1973 }
1974 // actor system is the bond's system
1975 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1976 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1977 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1978 port->aggregator = NULL;
1979 port->next_port_in_aggregator = NULL;
1980
1981 __disable_port(port);
1982 __initialize_port_locks(port);
1983
1984
1985 // aggregator initialization
1986 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1987
1988 ad_initialize_agg(aggregator);
1989
1990 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1991 aggregator->aggregator_identifier = (++aggregator_identifier);
1992 aggregator->slave = slave;
1993 aggregator->is_active = 0;
1994 aggregator->num_of_ports = 0;
1995 }
1996
1997 return 0;
1998}
1999
2000/**
2001 * bond_3ad_unbind_slave - deinitialize a slave's port
2002 * @slave: slave struct to work on
2003 *
2004 * Search for the aggregator that is related to this port, remove the
2005 * aggregator and assign another aggregator for other port related to it
2006 * (if any), and remove the port.
2007 */
2008void bond_3ad_unbind_slave(struct slave *slave)
2009{
2010 struct port *port, *prev_port, *temp_port;
2011 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2012 int select_new_active_agg = 0;
2013
2014 // find the aggregator related to this slave
2015 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
2016
2017 // find the port related to this slave
2018 port = &(SLAVE_AD_INFO(slave).port);
2019
2020 // if slave is null, the whole port is not initialized
2021 if (!port->slave) {
4e0952c7
MW		 2022 printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to "
2023 "unbind an uninitialized port on %s\n",
2024 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2025 return;
2026 }
2027
5a03cdb7 2028 pr_debug("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier);
1da177e4
LT		 2029
2030 /* Tell the partner that this port is not suitable for aggregation */
2031 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2032 __update_lacpdu_from_port(port);
2033 ad_lacpdu_send(port);
2034
2035 // check if this aggregator is occupied
2036 if (aggregator->lag_ports) {
2037 // check if there are other ports related to this aggregator except
2038 // the port related to this slave(thats ensure us that there is a
2039 // reason to search for new aggregator, and that we will find one
2040 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2041 // find new aggregator for the related port(s)
2042 new_aggregator = __get_first_agg(port);
2043 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
2044 // if the new aggregator is empty, or it connected to to our port only
2045 if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) {
2046 break;
2047 }
2048 }
2049 // if new aggregator found, copy the aggregator's parameters
2050 // and connect the related lag_ports to the new aggregator
2051 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
5a03cdb7 2052 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier);
1da177e4
LT		 2053
2054 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
4e0952c7
MW		 2055 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2056 aggregator->slave->dev->master->name);
1da177e4
LT		 2057 // select new active aggregator
2058 select_new_active_agg = 1;
2059 }
2060
2061 new_aggregator->is_individual = aggregator->is_individual;
2062 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2063 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2064 new_aggregator->partner_system = aggregator->partner_system;
2065 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2066 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2067 new_aggregator->receive_state = aggregator->receive_state;
2068 new_aggregator->transmit_state = aggregator->transmit_state;
2069 new_aggregator->lag_ports = aggregator->lag_ports;
2070 new_aggregator->is_active = aggregator->is_active;
2071 new_aggregator->num_of_ports = aggregator->num_of_ports;
2072
2073 // update the information that is written on the ports about the aggregator
2074 for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) {
2075 temp_port->aggregator=new_aggregator;
2076 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2077 }
2078
2079 // clear the aggregator
2080 ad_clear_agg(aggregator);
2081
2082 if (select_new_active_agg) {
2083 ad_agg_selection_logic(__get_first_agg(port));
2084 }
2085 } else {
4e0952c7
MW		 2086 printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, "
2087 "and could not find a new aggregator for its ports\n",
2088 slave->dev->master->name);
1da177e4
LT		 2089 }
2090 } else { // in case that the only port related to this aggregator is the one we want to remove
2091 select_new_active_agg = aggregator->is_active;
2092 // clear the aggregator
2093 ad_clear_agg(aggregator);
2094 if (select_new_active_agg) {
4e0952c7
MW		 2095 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2096 slave->dev->master->name);
1da177e4
LT		 2097 // select new active aggregator
2098 ad_agg_selection_logic(__get_first_agg(port));
2099 }
2100 }
2101 }
2102
5a03cdb7 2103 pr_debug("Unbinding port %d\n", port->actor_port_number);
1da177e4
LT		 2104 // find the aggregator that this port is connected to
2105 temp_aggregator = __get_first_agg(port);
2106 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2107 prev_port = NULL;
2108 // search the port in the aggregator's related ports
2109 for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) {
2110 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
2111 if (prev_port) {
2112 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
2113 } else {
2114 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
2115 }
2116 temp_aggregator->num_of_ports--;
2117 if (temp_aggregator->num_of_ports==0) {
2118 select_new_active_agg = temp_aggregator->is_active;
2119 // clear the aggregator
2120 ad_clear_agg(temp_aggregator);
2121 if (select_new_active_agg) {
4e0952c7
MW		 2122 printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n",
2123 slave->dev->master->name);
1da177e4
LT		 2124 // select new active aggregator
2125 ad_agg_selection_logic(__get_first_agg(port));
2126 }
2127 }
2128 break;
2129 }
2130 }
2131 }
2132 port->slave=NULL;
2133}
2134
2135/**
2136 * bond_3ad_state_machine_handler - handle state machines timeout
2137 * @bond: bonding struct to work on
2138 *
2139 * The state machine handling concept in this module is to check every tick
2140 * which state machine should operate any function. The execution order is
2141 * round robin, so when we have an interaction between state machines, the
2142 * reply of one to each other might be delayed until next tick.
2143 *
2144 * This function also complete the initialization when the agg_select_timer
2145 * times out, and it selects an aggregator for the ports that are yet not
2146 * related to any aggregator, and selects the active aggregator for a bond.
2147 */
1b76b316 2148void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2149{
1b76b316
JV		 2150 struct bonding *bond = container_of(work, struct bonding,
2151 ad_work.work);
1da177e4
LT		 2152 struct port *port;
2153 struct aggregator *aggregator;
2154
2155 read_lock(&bond->lock);
2156
2157 if (bond->kill_timers) {
2158 goto out;
2159 }
2160
2161 //check if there are any slaves
2162 if (bond->slave_cnt == 0) {
2163 goto re_arm;
2164 }
2165
2166 // check if agg_select_timer timer after initialize is timed out
2167 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2168 // select the active aggregator for the bond
2169 if ((port = __get_first_port(bond))) {
2170 if (!port->slave) {
4e0952c7
MW		 2171 printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is "
2172 "uninitialized\n", bond->dev->name);
1da177e4
LT		 2173 goto re_arm;
2174 }
2175
2176 aggregator = __get_first_agg(port);
2177 ad_agg_selection_logic(aggregator);
2178 }
f0c76d61 2179 bond_3ad_set_carrier(bond);
1da177e4
LT		 2180 }
2181
2182 // for each port run the state machines
2183 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2184 if (!port->slave) {
4e0952c7
MW		 2185 printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized "
2186 "port\n", bond->dev->name);
1da177e4
LT		 2187 goto re_arm;
2188 }
2189
2190 ad_rx_machine(NULL, port);
2191 ad_periodic_machine(port);
2192 ad_port_selection_logic(port);
2193 ad_mux_machine(port);
2194 ad_tx_machine(port);
2195
2196 // turn off the BEGIN bit, since we already handled it
2197 if (port->sm_vars & AD_PORT_BEGIN) {
2198 port->sm_vars &= ~AD_PORT_BEGIN;
2199 }
2200 }
2201
2202re_arm:
1b76b316 2203 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1da177e4
LT		 2204out:
2205 read_unlock(&bond->lock);
2206}
2207
2208/**
2209 * bond_3ad_rx_indication - handle a received frame
2210 * @lacpdu: received lacpdu
2211 * @slave: slave struct to work on
2212 * @length: length of the data received
2213 *
2214 * It is assumed that frames that were sent on this NIC don't returned as new
2215 * received frames (loopback). Since only the payload is given to this
2216 * function, it check for loopback.
2217 */
2218static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2219{
2220 struct port *port;
2221
2222 if (length >= sizeof(struct lacpdu)) {
2223
2224 port = &(SLAVE_AD_INFO(slave).port);
2225
2226 if (!port->slave) {
4e0952c7
MW		 2227 printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is "
2228 "uninitialized\n", slave->dev->name, slave->dev->master->name);
1da177e4
LT		 2229 return;
2230 }
2231
2232 switch (lacpdu->subtype) {
2233 case AD_TYPE_LACPDU:
5a03cdb7 2234 pr_debug("Received LACPDU on port %d\n", port->actor_port_number);
1da177e4
LT		 2235 ad_rx_machine(lacpdu, port);
2236 break;
2237
2238 case AD_TYPE_MARKER:
2239 // No need to convert fields to Little Endian since we don't use the marker's fields.
2240
1c3f0b8e 2241 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2242 case AD_MARKER_INFORMATION_SUBTYPE:
5a03cdb7 2243 pr_debug("Received Marker Information on port %d\n", port->actor_port_number);
1c3f0b8e 2244 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2245 break;
2246
2247 case AD_MARKER_RESPONSE_SUBTYPE:
5a03cdb7 2248 pr_debug("Received Marker Response on port %d\n", port->actor_port_number);
1c3f0b8e 2249 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2250 break;
2251
2252 default:
5a03cdb7 2253 pr_debug("Received an unknown Marker subtype on slot %d\n", port->actor_port_number);
1da177e4
LT		 2254 }
2255 }
2256 }
2257}
2258
2259/**
2260 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2261 * @slave: slave struct to work on
2262 *
2263 * Handle reselection of aggregator (if needed) for this port.
2264 */
2265void bond_3ad_adapter_speed_changed(struct slave *slave)
2266{
2267 struct port *port;
2268
2269 port = &(SLAVE_AD_INFO(slave).port);
2270
2271 // if slave is null, the whole port is not initialized
2272 if (!port->slave) {
4e0952c7
MW		 2273 printk(KERN_WARNING DRV_NAME ": Warning: %s: speed "
2274 "changed for uninitialized port on %s\n",
2275 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2276 return;
2277 }
2278
2279 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2280 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
5a03cdb7 2281 pr_debug("Port %d changed speed\n", port->actor_port_number);
1da177e4
LT		 2282 // there is no need to reselect a new aggregator, just signal the
2283 // state machines to reinitialize
2284 port->sm_vars |= AD_PORT_BEGIN;
2285}
2286
2287/**
2288 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2289 * @slave: slave struct to work on
2290 *
2291 * Handle reselection of aggregator (if needed) for this port.
2292 */
2293void bond_3ad_adapter_duplex_changed(struct slave *slave)
2294{
2295 struct port *port;
2296
2297 port=&(SLAVE_AD_INFO(slave).port);
2298
2299 // if slave is null, the whole port is not initialized
2300 if (!port->slave) {
4e0952c7
MW		 2301 printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed "
2302 "for uninitialized port on %s\n",
2303 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2304 return;
2305 }
2306
2307 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2308 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
5a03cdb7 2309 pr_debug("Port %d changed duplex\n", port->actor_port_number);
1da177e4
LT		 2310 // there is no need to reselect a new aggregator, just signal the
2311 // state machines to reinitialize
2312 port->sm_vars |= AD_PORT_BEGIN;
2313}
2314
2315/**
2316 * bond_3ad_handle_link_change - handle a slave's link status change indication
2317 * @slave: slave struct to work on
2318 * @status: whether the link is now up or down
2319 *
2320 * Handle reselection of aggregator (if needed) for this port.
2321 */
2322void bond_3ad_handle_link_change(struct slave *slave, char link)
2323{
2324 struct port *port;
2325
2326 port = &(SLAVE_AD_INFO(slave).port);
2327
2328 // if slave is null, the whole port is not initialized
2329 if (!port->slave) {
4e0952c7
MW		 2330 printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for "
2331 "uninitialized port on %s\n",
2332 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2333 return;
2334 }
2335
2336 // 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)
2337 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2338 if (link == BOND_LINK_UP) {
2339 port->is_enabled = 1;
2340 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2341 port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port);
2342 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
2343 port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1);
2344 } else {
2345 /* link has failed */
2346 port->is_enabled = 0;
2347 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
2348 port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS);
2349 }
2350 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2351 // there is no need to reselect a new aggregator, just signal the
2352 // state machines to reinitialize
2353 port->sm_vars |= AD_PORT_BEGIN;
2354}
2355
ff59c456 2356/*
031ae4de 2357 * set link state for bonding master: if we have an active
ff59c456
JV		 2358 * aggregator, we're up, if not, we're down. Presumes that we cannot
2359 * have an active aggregator if there are no slaves with link up.
2360 *
031ae4de
JV		 2361 * This behavior complies with IEEE 802.3 section 43.3.9.
2362 *
ff59c456
JV		 2363 * Called by bond_set_carrier(). Return zero if carrier state does not
2364 * change, nonzero if it does.
2365 */
2366int bond_3ad_set_carrier(struct bonding *bond)
2367{
031ae4de 2368 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
ff59c456
JV		 2369 if (!netif_carrier_ok(bond->dev)) {
2370 netif_carrier_on(bond->dev);
2371 return 1;
2372 }
2373 return 0;
2374 }
2375
2376 if (netif_carrier_ok(bond->dev)) {
2377 netif_carrier_off(bond->dev);
2378 return 1;
2379 }
2380 return 0;
2381}
2382
1da177e4
LT		 2383/**
2384 * bond_3ad_get_active_agg_info - get information of the active aggregator
2385 * @bond: bonding struct to work on
2386 * @ad_info: ad_info struct to fill with the bond's info
2387 *
2388 * Returns: 0 on success
2389 * < 0 on error
2390 */
2391int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2392{
2393 struct aggregator *aggregator = NULL;
2394 struct port *port;
2395
2396 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2397 if (port->aggregator && port->aggregator->is_active) {
2398 aggregator = port->aggregator;
2399 break;
2400 }
2401 }
2402
2403 if (aggregator) {
2404 ad_info->aggregator_id = aggregator->aggregator_identifier;
2405 ad_info->ports = aggregator->num_of_ports;
2406 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2407 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2408 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2409 return 0;
2410 }
2411
2412 return -1;
2413}
2414
2415int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2416{
2417 struct slave *slave, *start_at;
454d7c9b 2418 struct bonding *bond = netdev_priv(dev);
1da177e4
LT		 2419 int slave_agg_no;
2420 int slaves_in_agg;
2421 int agg_id;
2422 int i;
2423 struct ad_info ad_info;
2424 int res = 1;
2425
2426 /* make sure that the slaves list will
2427 * not change during tx
2428 */
2429 read_lock(&bond->lock);
2430
2431 if (!BOND_IS_OK(bond)) {
2432 goto out;
2433 }
2434
2435 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
4e0952c7
MW		 2436 printk(KERN_DEBUG DRV_NAME ": %s: Error: "
2437 "bond_3ad_get_active_agg_info failed\n", dev->name);
1da177e4
LT		 2438 goto out;
2439 }
2440
2441 slaves_in_agg = ad_info.ports;
2442 agg_id = ad_info.aggregator_id;
2443
2444 if (slaves_in_agg == 0) {
2445 /*the aggregator is empty*/
4e0952c7
MW		 2446 printk(KERN_DEBUG DRV_NAME ": %s: Error: active "
2447 "aggregator is empty\n",
2448 dev->name);
1da177e4
LT		 2449 goto out;
2450 }
2451
169a3e66 2452 slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg);
1da177e4
LT		 2453
2454 bond_for_each_slave(bond, slave, i) {
2455 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2456
2457 if (agg && (agg->aggregator_identifier == agg_id)) {
2458 slave_agg_no--;
2459 if (slave_agg_no < 0) {
2460 break;
2461 }
2462 }
2463 }
2464
2465 if (slave_agg_no >= 0) {
4e0952c7
MW		 2466 printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on "
2467 "for aggregator ID %d\n", dev->name, agg_id);
1da177e4
LT		 2468 goto out;
2469 }
2470
2471 start_at = slave;
2472
2473 bond_for_each_slave_from(bond, slave, i, start_at) {
2474 int slave_agg_id = 0;
2475 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2476
2477 if (agg) {
2478 slave_agg_id = agg->aggregator_identifier;
2479 }
2480
2481 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2482 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2483 break;
2484 }
2485 }
2486
2487out:
2488 if (res) {
2489 /* no suitable interface, frame not sent */
2490 dev_kfree_skb(skb);
2491 }
2492 read_unlock(&bond->lock);
2493 return 0;
2494}
2495
f2ccd8fa 2496int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev)
1da177e4 2497{
454d7c9b 2498 struct bonding *bond = netdev_priv(dev);
1da177e4
LT		 2499 struct slave *slave = NULL;
2500 int ret = NET_RX_DROP;
2501
c346dca1 2502 if (dev_net(dev) != &init_net)
e730c155
EB		 2503 goto out;
2504
f2ccd8fa 2505 if (!(dev->flags & IFF_MASTER))
1da177e4 2506 goto out;
1da177e4
LT		 2507
2508 read_lock(&bond->lock);
454d7c9b
WC		 2509 slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev),
2510 orig_dev);
f2ccd8fa 2511 if (!slave)
1da177e4 2512 goto out_unlock;
1da177e4
LT		 2513
2514 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
2515
2516 ret = NET_RX_SUCCESS;
2517
2518out_unlock:
2519 read_unlock(&bond->lock);
2520out:
2521 dev_kfree_skb(skb);
2522
2523 return ret;
2524}
2525
Linux kernel - Deliverables
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