projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
igb: Add device support for flashless SKU of i210 device
[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
a4aee5c8
JP		 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
1da177e4
LT		 25#include <linux/skbuff.h>
26#include <linux/if_ether.h>
27#include <linux/netdevice.h>
28#include <linux/spinlock.h>
29#include <linux/ethtool.h>
fd989c83 30#include <linux/etherdevice.h>
1da177e4
LT		 31#include <linux/if_bonding.h>
32#include <linux/pkt_sched.h>
e730c155 33#include <net/net_namespace.h>
1da177e4
LT		 34#include "bonding.h"
35#include "bond_3ad.h"
36
37// General definitions
38#define AD_SHORT_TIMEOUT 1
39#define AD_LONG_TIMEOUT 0
40#define AD_STANDBY 0x2
41#define AD_MAX_TX_IN_SECOND 3
42#define AD_COLLECTOR_MAX_DELAY 0
43
44// Timer definitions(43.4.4 in the 802.3ad standard)
45#define AD_FAST_PERIODIC_TIME 1
46#define AD_SLOW_PERIODIC_TIME 30
47#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
48#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
49#define AD_CHURN_DETECTION_TIME 60
50#define AD_AGGREGATE_WAIT_TIME 2
51
52// Port state definitions(43.4.2.2 in the 802.3ad standard)
53#define AD_STATE_LACP_ACTIVITY 0x1
54#define AD_STATE_LACP_TIMEOUT 0x2
55#define AD_STATE_AGGREGATION 0x4
56#define AD_STATE_SYNCHRONIZATION 0x8
57#define AD_STATE_COLLECTING 0x10
58#define AD_STATE_DISTRIBUTING 0x20
59#define AD_STATE_DEFAULTED 0x40
60#define AD_STATE_EXPIRED 0x80
61
62// Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
63#define AD_PORT_BEGIN 0x1
64#define AD_PORT_LACP_ENABLED 0x2
65#define AD_PORT_ACTOR_CHURN 0x4
66#define AD_PORT_PARTNER_CHURN 0x8
67#define AD_PORT_READY 0x10
68#define AD_PORT_READY_N 0x20
69#define AD_PORT_MATCHED 0x40
70#define AD_PORT_STANDBY 0x80
71#define AD_PORT_SELECTED 0x100
72#define AD_PORT_MOVED 0x200
73
74// Port Key definitions
75// key is determined according to the link speed, duplex and
76// user key(which is yet not supported)
77// ------------------------------------------------------------
78// Port key : | User key | Speed |Duplex|
79// ------------------------------------------------------------
80// 16 6 1 0
81#define AD_DUPLEX_KEY_BITS 0x1
82#define AD_SPEED_KEY_BITS 0x3E
83#define AD_USER_KEY_BITS 0xFFC0
84
85//dalloun
86#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
87#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
88#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
89#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
94dbffd5 90#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
1da177e4
LT		 91//endalloun
92
93// compare MAC addresses
94#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
95
128ea6c3 96static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
1da177e4
LT		 97static u16 ad_ticks_per_sec;
98static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
99
e4ac4320
HE		 100static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
101
1da177e4
LT		 102// ================= main 802.3ad protocol functions ==================
103static int ad_lacpdu_send(struct port *port);
1c3f0b8e 104static int ad_marker_send(struct port *port, struct bond_marker *marker);
1da177e4
LT		 105static void ad_mux_machine(struct port *port);
106static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
107static void ad_tx_machine(struct port *port);
108static void ad_periodic_machine(struct port *port);
109static void ad_port_selection_logic(struct port *port);
110static void ad_agg_selection_logic(struct aggregator *aggregator);
111static void ad_clear_agg(struct aggregator *aggregator);
112static void ad_initialize_agg(struct aggregator *aggregator);
113static void ad_initialize_port(struct port *port, int lacp_fast);
1da177e4
LT		 114static void ad_enable_collecting_distributing(struct port *port);
115static void ad_disable_collecting_distributing(struct port *port);
1c3f0b8e
MD		 116static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
117static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
1da177e4
LT		 118
119
120/////////////////////////////////////////////////////////////////////////////////
121// ================= api to bonding and kernel code ==================
122/////////////////////////////////////////////////////////////////////////////////
123
124/**
125 * __get_bond_by_port - get the port's bonding struct
126 * @port: the port we're looking at
127 *
128 * Return @port's bonding struct, or %NULL if it can't be found.
129 */
130static inline struct bonding *__get_bond_by_port(struct port *port)
131{
7bfc4753 132 if (port->slave == NULL)
1da177e4 133 return NULL;
1da177e4
LT		 134
135 return bond_get_bond_by_slave(port->slave);
136}
137
138/**
139 * __get_first_port - get the first port in the bond
140 * @bond: the bond we're looking at
141 *
142 * Return the port of the first slave in @bond, or %NULL if it can't be found.
143 */
144static inline struct port *__get_first_port(struct bonding *bond)
145{
dec1e90e 146 struct slave *first_slave = bond_first_slave(bond);
1da177e4 147
dec1e90e 148 return first_slave ? &(SLAVE_AD_INFO(first_slave).port) : NULL;
1da177e4
LT		 149}
150
151/**
152 * __get_next_port - get the next port in the bond
153 * @port: the port we're looking at
154 *
155 * Return the port of the slave that is next in line of @port's slave in the
156 * bond, or %NULL if it can't be found.
157 */
158static inline struct port *__get_next_port(struct port *port)
159{
160 struct bonding *bond = __get_bond_by_port(port);
dec1e90e 161 struct slave *slave = port->slave, *slave_next;
1da177e4
LT		 162
163 // If there's no bond for this port, or this is the last slave
dec1e90e 164 if (bond == NULL)
165 return NULL;
166 slave_next = bond_next_slave(bond, slave);
167 if (!slave_next || bond_is_first_slave(bond, slave_next))
1da177e4 168 return NULL;
1da177e4 169
dec1e90e 170 return &(SLAVE_AD_INFO(slave_next).port);
1da177e4
LT		 171}
172
173/**
174 * __get_first_agg - get the first aggregator in the bond
175 * @bond: the bond we're looking at
176 *
177 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
178 * found.
179 */
180static inline struct aggregator *__get_first_agg(struct port *port)
181{
182 struct bonding *bond = __get_bond_by_port(port);
dec1e90e 183 struct slave *first_slave;
1da177e4
LT		 184
185 // If there's no bond for this port, or bond has no slaves
dec1e90e 186 if (bond == NULL)
1da177e4 187 return NULL;
dec1e90e 188 first_slave = bond_first_slave(bond);
1da177e4 189
dec1e90e 190 return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL;
1da177e4
LT		 191}
192
193/**
194 * __get_next_agg - get the next aggregator in the bond
195 * @aggregator: the aggregator we're looking at
196 *
197 * Return the aggregator of the slave that is next in line of @aggregator's
198 * slave in the bond, or %NULL if it can't be found.
199 */
200static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
201{
dec1e90e 202 struct slave *slave = aggregator->slave, *slave_next;
1da177e4
LT		 203 struct bonding *bond = bond_get_bond_by_slave(slave);
204
205 // If there's no bond for this aggregator, or this is the last slave
dec1e90e 206 if (bond == NULL)
207 return NULL;
208 slave_next = bond_next_slave(bond, slave);
209 if (!slave_next || bond_is_first_slave(bond, slave_next))
1da177e4 210 return NULL;
1da177e4 211
dec1e90e 212 return &(SLAVE_AD_INFO(slave_next).aggregator);
1da177e4
LT		 213}
214
fd989c83
JV		 215/*
216 * __agg_has_partner
217 *
218 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
219 * address for the partner). Return 0 if not.
220 */
221static inline int __agg_has_partner(struct aggregator *agg)
222{
223 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
224}
225
1da177e4
LT		 226/**
227 * __disable_port - disable the port's slave
228 * @port: the port we're looking at
229 *
230 */
231static inline void __disable_port(struct port *port)
232{
233 bond_set_slave_inactive_flags(port->slave);
234}
235
236/**
237 * __enable_port - enable the port's slave, if it's up
238 * @port: the port we're looking at
239 *
240 */
241static inline void __enable_port(struct port *port)
242{
243 struct slave *slave = port->slave;
244
7bfc4753 245 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
1da177e4 246 bond_set_slave_active_flags(slave);
1da177e4
LT		 247}
248
249/**
250 * __port_is_enabled - check if the port's slave is in active state
251 * @port: the port we're looking at
252 *
253 */
254static inline int __port_is_enabled(struct port *port)
255{
e30bc066 256 return bond_is_active_slave(port->slave);
1da177e4
LT		 257}
258
259/**
260 * __get_agg_selection_mode - get the aggregator selection mode
261 * @port: the port we're looking at
262 *
fd989c83 263 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 264 */
265static inline u32 __get_agg_selection_mode(struct port *port)
266{
267 struct bonding *bond = __get_bond_by_port(port);
268
7bfc4753 269 if (bond == NULL)
fd989c83 270 return BOND_AD_STABLE;
1da177e4 271
1a14fbcb 272 return bond->params.ad_select;
1da177e4
LT		 273}
274
275/**
276 * __check_agg_selection_timer - check if the selection timer has expired
277 * @port: the port we're looking at
278 *
279 */
280static inline int __check_agg_selection_timer(struct port *port)
281{
282 struct bonding *bond = __get_bond_by_port(port);
283
7bfc4753 284 if (bond == NULL)
1da177e4 285 return 0;
1da177e4
LT		 286
287 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
288}
289
290/**
9ac3524a 291 * __get_state_machine_lock - lock the port's state machines
1da177e4
LT		 292 * @port: the port we're looking at
293 *
294 */
9ac3524a 295static inline void __get_state_machine_lock(struct port *port)
1da177e4 296{
9ac3524a 297 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 298}
299
300/**
9ac3524a 301 * __release_state_machine_lock - unlock the port's state machines
1da177e4
LT		 302 * @port: the port we're looking at
303 *
304 */
9ac3524a 305static inline void __release_state_machine_lock(struct port *port)
1da177e4 306{
9ac3524a 307 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 308}
309
310/**
311 * __get_link_speed - get a port's speed
312 * @port: the port we're looking at
313 *
314 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
315 * 0,
316 * %AD_LINK_SPEED_BITMASK_10MBPS,
317 * %AD_LINK_SPEED_BITMASK_100MBPS,
94dbffd5
JV		 318 * %AD_LINK_SPEED_BITMASK_1000MBPS,
319 * %AD_LINK_SPEED_BITMASK_10000MBPS
1da177e4
LT		 320 */
321static u16 __get_link_speed(struct port *port)
322{
323 struct slave *slave = port->slave;
324 u16 speed;
325
326 /* this if covers only a special case: when the configuration starts with
327 * link down, it sets the speed to 0.
328 * This is done in spite of the fact that the e100 driver reports 0 to be
329 * compatible with MVT in the future.*/
7bfc4753 330 if (slave->link != BOND_LINK_UP)
128ea6c3 331 speed = 0;
7bfc4753 332 else {
1da177e4
LT		 333 switch (slave->speed) {
334 case SPEED_10:
335 speed = AD_LINK_SPEED_BITMASK_10MBPS;
336 break;
337
338 case SPEED_100:
339 speed = AD_LINK_SPEED_BITMASK_100MBPS;
340 break;
341
342 case SPEED_1000:
343 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
344 break;
345
94dbffd5
JV		 346 case SPEED_10000:
347 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
348 break;
349
1da177e4
LT		 350 default:
351 speed = 0; // unknown speed value from ethtool. shouldn't happen
352 break;
353 }
354 }
355
a4aee5c8
JP		 356 pr_debug("Port %d Received link speed %d update from adapter\n",
357 port->actor_port_number, speed);
1da177e4
LT		 358 return speed;
359}
360
361/**
362 * __get_duplex - get a port's duplex
363 * @port: the port we're looking at
364 *
365 * Return @port's duplex in 802.3ad bitmask format. i.e.:
366 * 0x01 if in full duplex
367 * 0x00 otherwise
368 */
369static u8 __get_duplex(struct port *port)
370{
371 struct slave *slave = port->slave;
372
373 u8 retval;
374
375 // handling a special case: when the configuration starts with
376 // link down, it sets the duplex to 0.
7bfc4753 377 if (slave->link != BOND_LINK_UP)
128ea6c3 378 retval = 0x0;
7bfc4753 379 else {
1da177e4
LT		 380 switch (slave->duplex) {
381 case DUPLEX_FULL:
128ea6c3 382 retval = 0x1;
a4aee5c8
JP		 383 pr_debug("Port %d Received status full duplex update from adapter\n",
384 port->actor_port_number);
1da177e4
LT		 385 break;
386 case DUPLEX_HALF:
387 default:
128ea6c3 388 retval = 0x0;
a4aee5c8
JP		 389 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
390 port->actor_port_number);
1da177e4
LT		 391 break;
392 }
393 }
394 return retval;
395}
396
397/**
9ac3524a 398 * __initialize_port_locks - initialize a port's STATE machine spinlock
e0809dbc 399 * @port: the slave of the port we're looking at
1da177e4
LT		 400 *
401 */
e0809dbc 402static inline void __initialize_port_locks(struct slave *slave)
1da177e4
LT		 403{
404 // make sure it isn't called twice
e0809dbc 405 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock));
1da177e4
LT		 406}
407
408//conversions
1da177e4
LT		 409
410/**
411 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
412 * @timer_type: which timer to operate
413 * @par: timer parameter. see below
414 *
415 * If @timer_type is %current_while_timer, @par indicates long/short timer.
416 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
417 * %SLOW_PERIODIC_TIME.
418 */
419static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
420{
128ea6c3 421 u16 retval = 0; /* to silence the compiler */
1da177e4
LT		 422
423 switch (timer_type) {
424 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
7bfc4753 425 if (par)
1da177e4 426 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
7bfc4753 427 else
1da177e4 428 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
1da177e4
LT		 429 break;
430 case AD_ACTOR_CHURN_TIMER: // for local churn machine
431 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
432 break;
433 case AD_PERIODIC_TIMER: // for periodic machine
434 retval = (par*ad_ticks_per_sec); // long timeout
435 break;
436 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
437 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
438 break;
439 case AD_WAIT_WHILE_TIMER: // for selection machine
440 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
441 break;
442 }
443 return retval;
444}
445
446
447/////////////////////////////////////////////////////////////////////////////////
448// ================= ad_rx_machine helper functions ==================
449/////////////////////////////////////////////////////////////////////////////////
450
2d6682db
JV		 451/**
452 * __choose_matched - update a port's matched variable from a received lacpdu
453 * @lacpdu: the lacpdu we've received
454 * @port: the port we're looking at
455 *
456 * Update the value of the matched variable, using parameter values from a
457 * newly received lacpdu. Parameter values for the partner carried in the
458 * received PDU are compared with the corresponding operational parameter
459 * values for the actor. Matched is set to TRUE if all of these parameters
460 * match and the PDU parameter partner_state.aggregation has the same value as
461 * actor_oper_port_state.aggregation and lacp will actively maintain the link
462 * in the aggregation. Matched is also set to TRUE if the value of
463 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
464 * an individual link and lacp will actively maintain the link. Otherwise,
465 * matched is set to FALSE. LACP is considered to be actively maintaining the
466 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
467 * the actor's actor_oper_port_state.lacp_activity and the PDU's
468 * partner_state.lacp_activity variables are TRUE.
469 *
470 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
471 * used here to implement the language from 802.3ad 43.4.9 that requires
472 * recordPDU to "match" the LACPDU parameters to the stored values.
473 */
474static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
475{
476 // check if all parameters are alike
477 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
478 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
479 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
480 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
481 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
482 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
483 // or this is individual link(aggregation == FALSE)
484 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
485 ) {
486 // update the state machine Matched variable
487 port->sm_vars |= AD_PORT_MATCHED;
488 } else {
489 port->sm_vars &= ~AD_PORT_MATCHED;
490 }
491}
492
1da177e4
LT		 493/**
494 * __record_pdu - record parameters from a received lacpdu
495 * @lacpdu: the lacpdu we've received
496 * @port: the port we're looking at
497 *
498 * Record the parameter values for the Actor carried in a received lacpdu as
499 * the current partner operational parameter values and sets
500 * actor_oper_port_state.defaulted to FALSE.
501 */
502static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
503{
1da177e4 504 if (lacpdu && port) {
b99d6ba9
HE		 505 struct port_params *partner = &port->partner_oper;
506
2d6682db 507 __choose_matched(lacpdu, port);
1da177e4 508 // record the new parameter values for the partner operational
b99d6ba9
HE		 509 partner->port_number = ntohs(lacpdu->actor_port);
510 partner->port_priority = ntohs(lacpdu->actor_port_priority);
511 partner->system = lacpdu->actor_system;
512 partner->system_priority = ntohs(lacpdu->actor_system_priority);
513 partner->key = ntohs(lacpdu->actor_key);
514 partner->port_state = lacpdu->actor_state;
1da177e4
LT		 515
516 // set actor_oper_port_state.defaulted to FALSE
517 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
518
519 // set the partner sync. to on if the partner is sync. and the port is matched
7bfc4753
BD		 520 if ((port->sm_vars & AD_PORT_MATCHED)
521 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
b99d6ba9 522 partner->port_state |= AD_STATE_SYNCHRONIZATION;
7bfc4753 523 else
b99d6ba9 524 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 525 }
526}
527
528/**
529 * __record_default - record default parameters
530 * @port: the port we're looking at
531 *
532 * This function records the default parameter values for the partner carried
533 * in the Partner Admin parameters as the current partner operational parameter
534 * values and sets actor_oper_port_state.defaulted to TRUE.
535 */
536static void __record_default(struct port *port)
537{
1da177e4
LT		 538 if (port) {
539 // record the partner admin parameters
5eefd1ad
HE		 540 memcpy(&port->partner_oper, &port->partner_admin,
541 sizeof(struct port_params));
1da177e4
LT		 542
543 // set actor_oper_port_state.defaulted to true
544 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
545 }
546}
547
548/**
549 * __update_selected - update a port's Selected variable from a received lacpdu
550 * @lacpdu: the lacpdu we've received
551 * @port: the port we're looking at
552 *
553 * Update the value of the selected variable, using parameter values from a
554 * newly received lacpdu. The parameter values for the Actor carried in the
555 * received PDU are compared with the corresponding operational parameter
556 * values for the ports partner. If one or more of the comparisons shows that
557 * the value(s) received in the PDU differ from the current operational values,
558 * then selected is set to FALSE and actor_oper_port_state.synchronization is
559 * set to out_of_sync. Otherwise, selected remains unchanged.
560 */
561static void __update_selected(struct lacpdu *lacpdu, struct port *port)
562{
1da177e4 563 if (lacpdu && port) {
ce6a49ad
HE		 564 const struct port_params *partner = &port->partner_oper;
565
1da177e4 566 // check if any parameter is different
8e95a202
JP		 567 if (ntohs(lacpdu->actor_port) != partner->port_number ||
568 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
569 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
570 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
571 ntohs(lacpdu->actor_key) != partner->key ||
572 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 573 // update the state machine Selected variable
574 port->sm_vars &= ~AD_PORT_SELECTED;
575 }
576 }
577}
578
579/**
580 * __update_default_selected - update a port's Selected variable from Partner
581 * @port: the port we're looking at
582 *
583 * This function updates the value of the selected variable, using the partner
584 * administrative parameter values. The administrative values are compared with
585 * the corresponding operational parameter values for the partner. If one or
586 * more of the comparisons shows that the administrative value(s) differ from
587 * the current operational values, then Selected is set to FALSE and
588 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
589 * Selected remains unchanged.
590 */
591static void __update_default_selected(struct port *port)
592{
1da177e4 593 if (port) {
3c52065f
HE		 594 const struct port_params *admin = &port->partner_admin;
595 const struct port_params *oper = &port->partner_oper;
596
1da177e4 597 // check if any parameter is different
8e95a202
JP		 598 if (admin->port_number != oper->port_number ||
599 admin->port_priority != oper->port_priority ||
600 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
601 admin->system_priority != oper->system_priority ||
602 admin->key != oper->key ||
603 (admin->port_state & AD_STATE_AGGREGATION)
3c52065f 604 != (oper->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 605 // update the state machine Selected variable
606 port->sm_vars &= ~AD_PORT_SELECTED;
607 }
608 }
609}
610
1da177e4
LT		 611/**
612 * __update_ntt - update a port's ntt variable from a received lacpdu
613 * @lacpdu: the lacpdu we've received
614 * @port: the port we're looking at
615 *
616 * Updates the value of the ntt variable, using parameter values from a newly
617 * received lacpdu. The parameter values for the partner carried in the
618 * received PDU are compared with the corresponding operational parameter
619 * values for the Actor. If one or more of the comparisons shows that the
620 * value(s) received in the PDU differ from the current operational values,
621 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
622 */
623static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
624{
625 // validate lacpdu and port
626 if (lacpdu && port) {
627 // check if any parameter is different
89cc76f9
JV		 628 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
629 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
1da177e4 630 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 631 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
632 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 633 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
634 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
635 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
636 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
637 ) {
d238d458
HE		 638
639 port->ntt = true;
1da177e4
LT		 640 }
641 }
642}
643
644/**
645 * __attach_bond_to_agg
646 * @port: the port we're looking at
647 *
648 * Handle the attaching of the port's control parser/multiplexer and the
649 * aggregator. This function does nothing since the parser/multiplexer of the
650 * receive and the parser/multiplexer of the aggregator are already combined.
651 */
652static void __attach_bond_to_agg(struct port *port)
653{
128ea6c3 654 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 655 // This function does nothing since the parser/multiplexer of the receive
656 // and the parser/multiplexer of the aggregator are already combined
657}
658
659/**
660 * __detach_bond_from_agg
661 * @port: the port we're looking at
662 *
663 * Handle the detaching of the port's control parser/multiplexer from the
664 * aggregator. This function does nothing since the parser/multiplexer of the
665 * receive and the parser/multiplexer of the aggregator are already combined.
666 */
667static void __detach_bond_from_agg(struct port *port)
668{
128ea6c3 669 port = NULL; /* just to satisfy the compiler */
b9d6d2db 670 // This function does nothing since the parser/multiplexer of the receive
1da177e4
LT		 671 // and the parser/multiplexer of the aggregator are already combined
672}
673
674/**
675 * __agg_ports_are_ready - check if all ports in an aggregator are ready
676 * @aggregator: the aggregator we're looking at
677 *
678 */
679static int __agg_ports_are_ready(struct aggregator *aggregator)
680{
681 struct port *port;
682 int retval = 1;
683
684 if (aggregator) {
685 // scan all ports in this aggregator to verfy if they are all ready
128ea6c3
BD		 686 for (port = aggregator->lag_ports;
687 port;
688 port = port->next_port_in_aggregator) {
1da177e4
LT		 689 if (!(port->sm_vars & AD_PORT_READY_N)) {
690 retval = 0;
691 break;
692 }
693 }
694 }
695
696 return retval;
697}
698
699/**
700 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
701 * @aggregator: the aggregator we're looking at
702 * @val: Should the ports' ready bit be set on or off
703 *
704 */
705static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
706{
707 struct port *port;
708
128ea6c3
BD		 709 for (port = aggregator->lag_ports; port;
710 port = port->next_port_in_aggregator) {
7bfc4753 711 if (val)
1da177e4 712 port->sm_vars |= AD_PORT_READY;
7bfc4753 713 else
1da177e4 714 port->sm_vars &= ~AD_PORT_READY;
1da177e4
LT		 715 }
716}
717
718/**
719 * __get_agg_bandwidth - get the total bandwidth of an aggregator
720 * @aggregator: the aggregator we're looking at
721 *
722 */
723static u32 __get_agg_bandwidth(struct aggregator *aggregator)
724{
128ea6c3 725 u32 bandwidth = 0;
1da177e4
LT		 726
727 if (aggregator->num_of_ports) {
65cce19c 728 switch (__get_link_speed(aggregator->lag_ports)) {
1da177e4
LT		 729 case AD_LINK_SPEED_BITMASK_1MBPS:
730 bandwidth = aggregator->num_of_ports;
731 break;
732 case AD_LINK_SPEED_BITMASK_10MBPS:
733 bandwidth = aggregator->num_of_ports * 10;
734 break;
735 case AD_LINK_SPEED_BITMASK_100MBPS:
736 bandwidth = aggregator->num_of_ports * 100;
737 break;
738 case AD_LINK_SPEED_BITMASK_1000MBPS:
739 bandwidth = aggregator->num_of_ports * 1000;
740 break;
94dbffd5
JV		 741 case AD_LINK_SPEED_BITMASK_10000MBPS:
742 bandwidth = aggregator->num_of_ports * 10000;
743 break;
1da177e4 744 default:
128ea6c3 745 bandwidth = 0; /*to silence the compiler ....*/
1da177e4
LT		 746 }
747 }
748 return bandwidth;
749}
750
751/**
752 * __get_active_agg - get the current active aggregator
753 * @aggregator: the aggregator we're looking at
754 *
755 */
756static struct aggregator *__get_active_agg(struct aggregator *aggregator)
757{
758 struct aggregator *retval = NULL;
759
760 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
761 if (aggregator->is_active) {
762 retval = aggregator;
763 break;
764 }
765 }
766
767 return retval;
768}
769
770/**
771 * __update_lacpdu_from_port - update a port's lacpdu fields
772 * @port: the port we're looking at
773 *
774 */
775static inline void __update_lacpdu_from_port(struct port *port)
776{
777 struct lacpdu *lacpdu = &port->lacpdu;
3b5b35d0 778 const struct port_params *partner = &port->partner_oper;
1da177e4
LT		 779
780 /* update current actual Actor parameters */
781 /* lacpdu->subtype initialized
782 * lacpdu->version_number initialized
783 * lacpdu->tlv_type_actor_info initialized
784 * lacpdu->actor_information_length initialized
785 */
786
d3bb52b0 787 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 788 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 789 lacpdu->actor_key = htons(port->actor_oper_port_key);
790 lacpdu->actor_port_priority = htons(port->actor_port_priority);
791 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4
LT		 792 lacpdu->actor_state = port->actor_oper_port_state;
793
794 /* lacpdu->reserved_3_1 initialized
795 * lacpdu->tlv_type_partner_info initialized
796 * lacpdu->partner_information_length initialized
797 */
798
3b5b35d0
HE		 799 lacpdu->partner_system_priority = htons(partner->system_priority);
800 lacpdu->partner_system = partner->system;
801 lacpdu->partner_key = htons(partner->key);
802 lacpdu->partner_port_priority = htons(partner->port_priority);
803 lacpdu->partner_port = htons(partner->port_number);
804 lacpdu->partner_state = partner->port_state;
1da177e4
LT		 805
806 /* lacpdu->reserved_3_2 initialized
807 * lacpdu->tlv_type_collector_info initialized
808 * lacpdu->collector_information_length initialized
809 * collector_max_delay initialized
810 * reserved_12[12] initialized
811 * tlv_type_terminator initialized
812 * terminator_length initialized
813 * reserved_50[50] initialized
814 */
1da177e4
LT		 815}
816
817//////////////////////////////////////////////////////////////////////////////////////
818// ================= main 802.3ad protocol code ======================================
819//////////////////////////////////////////////////////////////////////////////////////
820
821/**
822 * ad_lacpdu_send - send out a lacpdu packet on a given port
823 * @port: the port we're looking at
824 *
825 * Returns: 0 on success
826 * < 0 on error
827 */
828static int ad_lacpdu_send(struct port *port)
829{
830 struct slave *slave = port->slave;
831 struct sk_buff *skb;
832 struct lacpdu_header *lacpdu_header;
833 int length = sizeof(struct lacpdu_header);
1da177e4
LT		 834
835 skb = dev_alloc_skb(length);
7bfc4753 836 if (!skb)
1da177e4 837 return -ENOMEM;
1da177e4
LT		 838
839 skb->dev = slave->dev;
459a98ed 840 skb_reset_mac_header(skb);
b0e380b1 841 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 842 skb->protocol = PKT_TYPE_LACPDU;
843 skb->priority = TC_PRIO_CONTROL;
844
845 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
846
e727149e 847 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 848 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 849 because we use it to identify loopback lacpdus in receive. */
e727149e
HE		 850 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
851 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 852
853 lacpdu_header->lacpdu = port->lacpdu; // struct copy
854
855 dev_queue_xmit(skb);
856
857 return 0;
858}
859
860/**
861 * ad_marker_send - send marker information/response on a given port
862 * @port: the port we're looking at
863 * @marker: marker data to send
864 *
865 * Returns: 0 on success
866 * < 0 on error
867 */
1c3f0b8e 868static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 869{
870 struct slave *slave = port->slave;
871 struct sk_buff *skb;
1c3f0b8e
MD		 872 struct bond_marker_header *marker_header;
873 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 874
875 skb = dev_alloc_skb(length + 16);
7bfc4753 876 if (!skb)
1da177e4 877 return -ENOMEM;
1da177e4
LT		 878
879 skb_reserve(skb, 16);
880
881 skb->dev = slave->dev;
459a98ed 882 skb_reset_mac_header(skb);
b0e380b1 883 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 884 skb->protocol = PKT_TYPE_LACPDU;
885
1c3f0b8e 886 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4 887
e727149e 888 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 889 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 890 because we use it to identify loopback MARKERs in receive. */
e727149e
HE		 891 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
892 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 893
894 marker_header->marker = *marker; // struct copy
895
896 dev_queue_xmit(skb);
897
898 return 0;
899}
900
901/**
902 * ad_mux_machine - handle a port's mux state machine
903 * @port: the port we're looking at
904 *
905 */
906static void ad_mux_machine(struct port *port)
907{
908 mux_states_t last_state;
909
910 // keep current State Machine state to compare later if it was changed
911 last_state = port->sm_mux_state;
912
913 if (port->sm_vars & AD_PORT_BEGIN) {
914 port->sm_mux_state = AD_MUX_DETACHED; // next state
915 } else {
916 switch (port->sm_mux_state) {
917 case AD_MUX_DETACHED:
7bfc4753
BD		 918 if ((port->sm_vars & AD_PORT_SELECTED)
919 || (port->sm_vars & AD_PORT_STANDBY))
920 /* if SELECTED or STANDBY */
1da177e4 921 port->sm_mux_state = AD_MUX_WAITING; // next state
1da177e4
LT		 922 break;
923 case AD_MUX_WAITING:
924 // if SELECTED == FALSE return to DETACH state
925 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
926 port->sm_vars &= ~AD_PORT_READY_N;
927 // in order to withhold the Selection Logic to check all ports READY_N value
928 // every callback cycle to update ready variable, we check READY_N and update READY here
929 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
930 port->sm_mux_state = AD_MUX_DETACHED; // next state
931 break;
932 }
933
934 // check if the wait_while_timer expired
7bfc4753
BD		 935 if (port->sm_mux_timer_counter
936 && !(--port->sm_mux_timer_counter))
1da177e4 937 port->sm_vars |= AD_PORT_READY_N;
1da177e4
LT		 938
939 // in order to withhold the selection logic to check all ports READY_N value
940 // every callback cycle to update ready variable, we check READY_N and update READY here
941 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
942
943 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
7bfc4753
BD		 944 if ((port->sm_vars & AD_PORT_READY)
945 && !port->sm_mux_timer_counter)
1da177e4 946 port->sm_mux_state = AD_MUX_ATTACHED; // next state
1da177e4
LT		 947 break;
948 case AD_MUX_ATTACHED:
949 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
1055c9ab 950 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
1da177e4
LT		 951 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
952 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
953 port->sm_vars &= ~AD_PORT_READY_N;
954 // in order to withhold the selection logic to check all ports READY_N value
955 // every callback cycle to update ready variable, we check READY_N and update READY here
956 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
957 port->sm_mux_state = AD_MUX_DETACHED;// next state
958 }
959 break;
960 case AD_MUX_COLLECTING_DISTRIBUTING:
961 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
1055c9ab 962 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
1da177e4
LT		 963 ) {
964 port->sm_mux_state = AD_MUX_ATTACHED;// next state
965
966 } else {
967 // if port state hasn't changed make
968 // sure that a collecting distributing
969 // port in an active aggregator is enabled
970 if (port->aggregator &&
971 port->aggregator->is_active &&
972 !__port_is_enabled(port)) {
973
974 __enable_port(port);
975 }
976 }
977 break;
978 default: //to silence the compiler
979 break;
980 }
981 }
982
983 // check if the state machine was changed
984 if (port->sm_mux_state != last_state) {
a4aee5c8
JP		 985 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
986 port->actor_port_number, last_state,
987 port->sm_mux_state);
1da177e4
LT		 988 switch (port->sm_mux_state) {
989 case AD_MUX_DETACHED:
990 __detach_bond_from_agg(port);
991 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
992 ad_disable_collecting_distributing(port);
993 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
994 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
d238d458 995 port->ntt = true;
1da177e4
LT		 996 break;
997 case AD_MUX_WAITING:
998 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
999 break;
1000 case AD_MUX_ATTACHED:
1001 __attach_bond_to_agg(port);
1002 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
1003 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1004 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1005 ad_disable_collecting_distributing(port);
d238d458 1006 port->ntt = true;
1da177e4
LT		 1007 break;
1008 case AD_MUX_COLLECTING_DISTRIBUTING:
1009 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1010 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1011 ad_enable_collecting_distributing(port);
d238d458 1012 port->ntt = true;
1da177e4
LT		 1013 break;
1014 default: //to silence the compiler
1015 break;
1016 }
1017 }
1018}
1019
1020/**
1021 * ad_rx_machine - handle a port's rx State Machine
1022 * @lacpdu: the lacpdu we've received
1023 * @port: the port we're looking at
1024 *
1025 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1026 * CURRENT. If timer expired set the state machine in the proper state.
1027 * In other cases, this function checks if we need to switch to other state.
1028 */
1029static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1030{
1031 rx_states_t last_state;
1032
1da177e4
LT		 1033 // keep current State Machine state to compare later if it was changed
1034 last_state = port->sm_rx_state;
1035
1036 // check if state machine should change state
1037 // first, check if port was reinitialized
7bfc4753
BD		 1038 if (port->sm_vars & AD_PORT_BEGIN)
1039 /* next state */
1040 port->sm_rx_state = AD_RX_INITIALIZE;
1da177e4 1041 // check if port is not enabled
7bfc4753
BD		 1042 else if (!(port->sm_vars & AD_PORT_BEGIN)
1043 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1044 /* next state */
1045 port->sm_rx_state = AD_RX_PORT_DISABLED;
1da177e4
LT		 1046 // check if new lacpdu arrived
1047 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1048 port->sm_rx_timer_counter = 0; // zero timer
1049 port->sm_rx_state = AD_RX_CURRENT;
1050 } else {
1051 // if timer is on, and if it is expired
1052 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1053 switch (port->sm_rx_state) {
1054 case AD_RX_EXPIRED:
1055 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1056 break;
1057 case AD_RX_CURRENT:
1058 port->sm_rx_state = AD_RX_EXPIRED; // next state
1059 break;
1060 default: //to silence the compiler
1061 break;
1062 }
1063 } else {
1064 // if no lacpdu arrived and no timer is on
1065 switch (port->sm_rx_state) {
1066 case AD_RX_PORT_DISABLED:
7bfc4753 1067 if (port->sm_vars & AD_PORT_MOVED)
1da177e4 1068 port->sm_rx_state = AD_RX_INITIALIZE; // next state
7bfc4753
BD		 1069 else if (port->is_enabled
1070 && (port->sm_vars
1071 & AD_PORT_LACP_ENABLED))
1da177e4 1072 port->sm_rx_state = AD_RX_EXPIRED; // next state
7bfc4753
BD		 1073 else if (port->is_enabled
1074 && ((port->sm_vars
1075 & AD_PORT_LACP_ENABLED) == 0))
1da177e4 1076 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1da177e4
LT		 1077 break;
1078 default: //to silence the compiler
1079 break;
1080
1081 }
1082 }
1083 }
1084
1085 // check if the State machine was changed or new lacpdu arrived
1086 if ((port->sm_rx_state != last_state) || (lacpdu)) {
a4aee5c8
JP		 1087 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1088 port->actor_port_number, last_state,
1089 port->sm_rx_state);
1da177e4
LT		 1090 switch (port->sm_rx_state) {
1091 case AD_RX_INITIALIZE:
7bfc4753 1092 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1093 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
7bfc4753 1094 else
1da177e4 1095 port->sm_vars |= AD_PORT_LACP_ENABLED;
1da177e4
LT		 1096 port->sm_vars &= ~AD_PORT_SELECTED;
1097 __record_default(port);
1098 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1099 port->sm_vars &= ~AD_PORT_MOVED;
1100 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1101
1102 /*- Fall Through -*/
1103
1104 case AD_RX_PORT_DISABLED:
1105 port->sm_vars &= ~AD_PORT_MATCHED;
1106 break;
1107 case AD_RX_LACP_DISABLED:
1108 port->sm_vars &= ~AD_PORT_SELECTED;
1109 __record_default(port);
1055c9ab 1110 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1111 port->sm_vars |= AD_PORT_MATCHED;
1112 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1113 break;
1114 case AD_RX_EXPIRED:
1115 //Reset of the Synchronization flag. (Standard 43.4.12)
1116 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1117 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1055c9ab 1118 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1119 port->sm_vars &= ~AD_PORT_MATCHED;
8e321c4f
JL		 1120 port->partner_oper.port_state |=
1121 AD_STATE_LACP_ACTIVITY;
1da177e4
LT		 1122 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1123 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1124 break;
1125 case AD_RX_DEFAULTED:
1126 __update_default_selected(port);
1127 __record_default(port);
1128 port->sm_vars |= AD_PORT_MATCHED;
1129 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1130 break;
1131 case AD_RX_CURRENT:
1132 // detect loopback situation
1133 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1134 // INFO_RECEIVED_LOOPBACK_FRAMES
a4aee5c8
JP		 1135 pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
1136 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
471cb5a3 1137 port->slave->bond->dev->name, port->slave->dev->name);
1da177e4
LT		 1138 return;
1139 }
1140 __update_selected(lacpdu, port);
1141 __update_ntt(lacpdu, port);
1142 __record_pdu(lacpdu, port);
1da177e4
LT		 1143 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1144 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1da177e4
LT		 1145 break;
1146 default: //to silence the compiler
1147 break;
1148 }
1149 }
1da177e4
LT		 1150}
1151
1152/**
1153 * ad_tx_machine - handle a port's tx state machine
1154 * @port: the port we're looking at
1155 *
1156 */
1157static void ad_tx_machine(struct port *port)
1158{
1159 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1160 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1161 // check if there is something to send
1162 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1163 __update_lacpdu_from_port(port);
d238d458 1164
1da177e4 1165 if (ad_lacpdu_send(port) >= 0) {
a4aee5c8
JP		 1166 pr_debug("Sent LACPDU on port %d\n",
1167 port->actor_port_number);
d238d458
HE		 1168
1169 /* mark ntt as false, so it will not be sent again until
1170 demanded */
1171 port->ntt = false;
1da177e4
LT		 1172 }
1173 }
1174 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
128ea6c3
BD		 1175 port->sm_tx_timer_counter =
1176 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 1177 }
1178}
1179
1180/**
1181 * ad_periodic_machine - handle a port's periodic state machine
1182 * @port: the port we're looking at
1183 *
1184 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1185 */
1186static void ad_periodic_machine(struct port *port)
1187{
1188 periodic_states_t last_state;
1189
1190 // keep current state machine state to compare later if it was changed
1191 last_state = port->sm_periodic_state;
1192
1193 // check if port was reinitialized
1194 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1195 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4
LT		 1196 ) {
1197 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1198 }
1199 // check if state machine should change state
1200 else if (port->sm_periodic_timer_counter) {
1201 // check if periodic state machine expired
1202 if (!(--port->sm_periodic_timer_counter)) {
1203 // if expired then do tx
1204 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1205 } else {
1206 // If not expired, check if there is some new timeout parameter from the partner state
1207 switch (port->sm_periodic_state) {
1208 case AD_FAST_PERIODIC:
7bfc4753
BD		 1209 if (!(port->partner_oper.port_state
1210 & AD_STATE_LACP_TIMEOUT))
1da177e4 1211 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1da177e4
LT		 1212 break;
1213 case AD_SLOW_PERIODIC:
1055c9ab 1214 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4
LT		 1215 // stop current timer
1216 port->sm_periodic_timer_counter = 0;
1217 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1218 }
1219 break;
1220 default: //to silence the compiler
1221 break;
1222 }
1223 }
1224 } else {
1225 switch (port->sm_periodic_state) {
1226 case AD_NO_PERIODIC:
1227 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1228 break;
1229 case AD_PERIODIC_TX:
7bfc4753
BD		 1230 if (!(port->partner_oper.port_state
1231 & AD_STATE_LACP_TIMEOUT))
1da177e4 1232 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
7bfc4753 1233 else
1da177e4 1234 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1da177e4
LT		 1235 break;
1236 default: //to silence the compiler
1237 break;
1238 }
1239 }
1240
1241 // check if the state machine was changed
1242 if (port->sm_periodic_state != last_state) {
a4aee5c8
JP		 1243 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1244 port->actor_port_number, last_state,
1245 port->sm_periodic_state);
1da177e4
LT		 1246 switch (port->sm_periodic_state) {
1247 case AD_NO_PERIODIC:
1248 port->sm_periodic_timer_counter = 0; // zero timer
1249 break;
1250 case AD_FAST_PERIODIC:
1251 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
1252 break;
1253 case AD_SLOW_PERIODIC:
1254 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
1255 break;
1256 case AD_PERIODIC_TX:
d238d458 1257 port->ntt = true;
1da177e4
LT		 1258 break;
1259 default: //to silence the compiler
1260 break;
1261 }
1262 }
1263}
1264
1265/**
1266 * ad_port_selection_logic - select aggregation groups
1267 * @port: the port we're looking at
1268 *
1269 * Select aggregation groups, and assign each port for it's aggregetor. The
1270 * selection logic is called in the inititalization (after all the handshkes),
1271 * and after every lacpdu receive (if selected is off).
1272 */
1273static void ad_port_selection_logic(struct port *port)
1274{
1275 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1276 struct port *last_port = NULL, *curr_port;
1277 int found = 0;
1278
1279 // if the port is already Selected, do nothing
7bfc4753 1280 if (port->sm_vars & AD_PORT_SELECTED)
1da177e4 1281 return;
1da177e4
LT		 1282
1283 // if the port is connected to other aggregator, detach it
1284 if (port->aggregator) {
1285 // detach the port from its former aggregator
128ea6c3
BD		 1286 temp_aggregator = port->aggregator;
1287 for (curr_port = temp_aggregator->lag_ports; curr_port;
1288 last_port = curr_port,
1289 curr_port = curr_port->next_port_in_aggregator) {
1da177e4
LT		 1290 if (curr_port == port) {
1291 temp_aggregator->num_of_ports--;
1292 if (!last_port) {// if it is the first port attached to the aggregator
128ea6c3
BD		 1293 temp_aggregator->lag_ports =
1294 port->next_port_in_aggregator;
1da177e4 1295 } else {// not the first port attached to the aggregator
128ea6c3
BD		 1296 last_port->next_port_in_aggregator =
1297 port->next_port_in_aggregator;
1da177e4
LT		 1298 }
1299
1300 // clear the port's relations to this aggregator
1301 port->aggregator = NULL;
128ea6c3
BD		 1302 port->next_port_in_aggregator = NULL;
1303 port->actor_port_aggregator_identifier = 0;
1da177e4 1304
a4aee5c8
JP		 1305 pr_debug("Port %d left LAG %d\n",
1306 port->actor_port_number,
1307 temp_aggregator->aggregator_identifier);
1da177e4 1308 // if the aggregator is empty, clear its parameters, and set it ready to be attached
7bfc4753 1309 if (!temp_aggregator->lag_ports)
1da177e4 1310 ad_clear_agg(temp_aggregator);
1da177e4
LT		 1311 break;
1312 }
1313 }
1314 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
a4aee5c8 1315 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
471cb5a3 1316 port->slave->bond->dev->name,
e5e2a8fd
JP		 1317 port->actor_port_number,
1318 port->slave->dev->name,
1319 port->aggregator->aggregator_identifier);
1da177e4
LT		 1320 }
1321 }
1322 // search on all aggregators for a suitable aggregator for this port
1323 for (aggregator = __get_first_agg(port); aggregator;
1324 aggregator = __get_next_agg(aggregator)) {
1325
1326 // keep a free aggregator for later use(if needed)
1327 if (!aggregator->lag_ports) {
7bfc4753 1328 if (!free_aggregator)
128ea6c3 1329 free_aggregator = aggregator;
1da177e4
LT		 1330 continue;
1331 }
1332 // check if current aggregator suits us
1333 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1055c9ab
HE		 1334 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1335 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1336 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1337 ) &&
1055c9ab 1338 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1da177e4
LT		 1339 !aggregator->is_individual) // but is not individual OR
1340 )
1341 ) {
1342 // attach to the founded aggregator
1343 port->aggregator = aggregator;
128ea6c3
BD		 1344 port->actor_port_aggregator_identifier =
1345 port->aggregator->aggregator_identifier;
1346 port->next_port_in_aggregator = aggregator->lag_ports;
1da177e4 1347 port->aggregator->num_of_ports++;
128ea6c3 1348 aggregator->lag_ports = port;
a4aee5c8
JP		 1349 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1350 port->actor_port_number,
1351 port->aggregator->aggregator_identifier);
1da177e4
LT		 1352
1353 // mark this port as selected
1354 port->sm_vars |= AD_PORT_SELECTED;
1355 found = 1;
1356 break;
1357 }
1358 }
1359
1360 // the port couldn't find an aggregator - attach it to a new aggregator
1361 if (!found) {
1362 if (free_aggregator) {
1363 // assign port a new aggregator
1364 port->aggregator = free_aggregator;
128ea6c3
BD		 1365 port->actor_port_aggregator_identifier =
1366 port->aggregator->aggregator_identifier;
1da177e4
LT		 1367
1368 // update the new aggregator's parameters
1369 // if port was responsed from the end-user
7bfc4753
BD		 1370 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1371 /* if port is full duplex */
1624db7b 1372 port->aggregator->is_individual = false;
7bfc4753 1373 else
1624db7b 1374 port->aggregator->is_individual = true;
1da177e4
LT		 1375
1376 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1377 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
128ea6c3
BD		 1378 port->aggregator->partner_system =
1379 port->partner_oper.system;
1380 port->aggregator->partner_system_priority =
1381 port->partner_oper.system_priority;
1055c9ab 1382 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1383 port->aggregator->receive_state = 1;
1384 port->aggregator->transmit_state = 1;
1385 port->aggregator->lag_ports = port;
1386 port->aggregator->num_of_ports++;
1387
1388 // mark this port as selected
1389 port->sm_vars |= AD_PORT_SELECTED;
1390
a4aee5c8
JP		 1391 pr_debug("Port %d joined LAG %d(new LAG)\n",
1392 port->actor_port_number,
1393 port->aggregator->aggregator_identifier);
1da177e4 1394 } else {
a4aee5c8 1395 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
471cb5a3 1396 port->slave->bond->dev->name,
1da177e4
LT		 1397 port->actor_port_number, port->slave->dev->name);
1398 }
1399 }
1400 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1401 // else set ready=FALSE in all aggregator's ports
1402 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1403
fd989c83
JV		 1404 aggregator = __get_first_agg(port);
1405 ad_agg_selection_logic(aggregator);
1406}
1407
1408/*
1409 * Decide if "agg" is a better choice for the new active aggregator that
1410 * the current best, according to the ad_select policy.
1411 */
1412static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1413 struct aggregator *curr)
1414{
1415 /*
1416 * 0. If no best, select current.
1417 *
1418 * 1. If the current agg is not individual, and the best is
1419 * individual, select current.
1420 *
1421 * 2. If current agg is individual and the best is not, keep best.
1422 *
1423 * 3. Therefore, current and best are both individual or both not
1424 * individual, so:
1425 *
1426 * 3a. If current agg partner replied, and best agg partner did not,
1427 * select current.
1428 *
1429 * 3b. If current agg partner did not reply and best agg partner
1430 * did reply, keep best.
1431 *
1432 * 4. Therefore, current and best both have partner replies or
1433 * both do not, so perform selection policy:
1434 *
1435 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1436 * select by bandwidth.
1437 *
1438 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1439 */
1440 if (!best)
1441 return curr;
1442
1443 if (!curr->is_individual && best->is_individual)
1444 return curr;
1445
1446 if (curr->is_individual && !best->is_individual)
1447 return best;
1448
1449 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1450 return curr;
1451
1452 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1453 return best;
1454
1455 switch (__get_agg_selection_mode(curr->lag_ports)) {
1456 case BOND_AD_COUNT:
1457 if (curr->num_of_ports > best->num_of_ports)
1458 return curr;
1459
1460 if (curr->num_of_ports < best->num_of_ports)
1461 return best;
1462
1463 /*FALLTHROUGH*/
1464 case BOND_AD_STABLE:
1465 case BOND_AD_BANDWIDTH:
1466 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1467 return curr;
1468
1469 break;
1470
1471 default:
a4aee5c8 1472 pr_warning("%s: Impossible agg select mode %d\n",
471cb5a3 1473 curr->slave->bond->dev->name,
e5e2a8fd 1474 __get_agg_selection_mode(curr->lag_ports));
fd989c83 1475 break;
1da177e4 1476 }
fd989c83
JV		 1477
1478 return best;
1da177e4
LT		 1479}
1480
4cd6fe1c
SH		 1481static int agg_device_up(const struct aggregator *agg)
1482{
2430af8b
JB		 1483 struct port *port = agg->lag_ports;
1484 if (!port)
1485 return 0;
1486 return (netif_running(port->slave->dev) &&
1487 netif_carrier_ok(port->slave->dev));
4cd6fe1c
SH		 1488}
1489
1da177e4
LT		 1490/**
1491 * ad_agg_selection_logic - select an aggregation group for a team
1492 * @aggregator: the aggregator we're looking at
1493 *
1494 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1495 *
1496 * The logic of this function is to select the aggregator according to
1497 * the ad_select policy:
1498 *
1499 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1500 * it, and to reselect the active aggregator only if the previous
1501 * aggregator has no more ports related to it.
1502 *
1503 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1504 * bandwidth, and reselect whenever a link state change takes place or the
1505 * set of slaves in the bond changes.
1506 *
1507 * BOND_AD_COUNT: select the aggregator with largest number of ports
1508 * (slaves), and reselect whenever a link state change takes place or the
1509 * set of slaves in the bond changes.
1da177e4
LT		 1510 *
1511 * FIXME: this function MUST be called with the first agg in the bond, or
1512 * __get_active_agg() won't work correctly. This function should be better
1513 * called with the bond itself, and retrieve the first agg from it.
1514 */
fd989c83 1515static void ad_agg_selection_logic(struct aggregator *agg)
1da177e4 1516{
fd989c83 1517 struct aggregator *best, *active, *origin;
1da177e4 1518 struct port *port;
1da177e4 1519
fd989c83 1520 origin = agg;
fd989c83 1521 active = __get_active_agg(agg);
4cd6fe1c 1522 best = (active && agg_device_up(active)) ? active : NULL;
1da177e4 1523
1da177e4 1524 do {
fd989c83
JV		 1525 agg->is_active = 0;
1526
4cd6fe1c 1527 if (agg->num_of_ports && agg_device_up(agg))
fd989c83
JV		 1528 best = ad_agg_selection_test(best, agg);
1529
1530 } while ((agg = __get_next_agg(agg)));
1531
1532 if (best &&
1533 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1534 /*
1535 * For the STABLE policy, don't replace the old active
1536 * aggregator if it's still active (it has an answering
1537 * partner) or if both the best and active don't have an
1538 * answering partner.
1539 */
1540 if (active && active->lag_ports &&
1541 active->lag_ports->is_enabled &&
1542 (__agg_has_partner(active) ||
1543 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1544 if (!(!active->actor_oper_aggregator_key &&
1545 best->actor_oper_aggregator_key)) {
1546 best = NULL;
1547 active->is_active = 1;
1da177e4
LT		 1548 }
1549 }
fd989c83 1550 }
1da177e4 1551
fd989c83
JV		 1552 if (best && (best == active)) {
1553 best = NULL;
1554 active->is_active = 1;
1da177e4
LT		 1555 }
1556
1557 // if there is new best aggregator, activate it
fd989c83 1558 if (best) {
5a03cdb7 1559 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1560 best->aggregator_identifier, best->num_of_ports,
1561 best->actor_oper_aggregator_key,
1562 best->partner_oper_aggregator_key,
1563 best->is_individual, best->is_active);
5a03cdb7 1564 pr_debug("best ports %p slave %p %s\n",
a4aee5c8
JP		 1565 best->lag_ports, best->slave,
1566 best->slave ? best->slave->dev->name : "NULL");
fd989c83
JV		 1567
1568 for (agg = __get_first_agg(best->lag_ports); agg;
1569 agg = __get_next_agg(agg)) {
1570
5a03cdb7 1571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1572 agg->aggregator_identifier, agg->num_of_ports,
1573 agg->actor_oper_aggregator_key,
1574 agg->partner_oper_aggregator_key,
1575 agg->is_individual, agg->is_active);
1da177e4
LT		 1576 }
1577
1578 // check if any partner replys
fd989c83 1579 if (best->is_individual) {
a4aee5c8 1580 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
471cb5a3 1581 best->slave ? best->slave->bond->dev->name : "NULL");
1da177e4
LT		 1582 }
1583
fd989c83 1584 best->is_active = 1;
5a03cdb7 1585 pr_debug("LAG %d chosen as the active LAG\n",
a4aee5c8 1586 best->aggregator_identifier);
5a03cdb7 1587 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1588 best->aggregator_identifier, best->num_of_ports,
1589 best->actor_oper_aggregator_key,
1590 best->partner_oper_aggregator_key,
1591 best->is_individual, best->is_active);
1da177e4
LT		 1592
1593 // disable the ports that were related to the former active_aggregator
fd989c83
JV		 1594 if (active) {
1595 for (port = active->lag_ports; port;
1596 port = port->next_port_in_aggregator) {
1da177e4
LT		 1597 __disable_port(port);
1598 }
1599 }
1600 }
1601
fd989c83
JV		 1602 /*
1603 * if the selected aggregator is of join individuals
1604 * (partner_system is NULL), enable their ports
1605 */
1606 active = __get_active_agg(origin);
1da177e4 1607
fd989c83
JV		 1608 if (active) {
1609 if (!__agg_has_partner(active)) {
1610 for (port = active->lag_ports; port;
1611 port = port->next_port_in_aggregator) {
1da177e4
LT		 1612 __enable_port(port);
1613 }
1614 }
1615 }
fd989c83
JV		 1616
1617 if (origin->slave) {
1618 struct bonding *bond;
1619
1620 bond = bond_get_bond_by_slave(origin->slave);
1621 if (bond)
1622 bond_3ad_set_carrier(bond);
1623 }
1da177e4
LT		 1624}
1625
1626/**
1627 * ad_clear_agg - clear a given aggregator's parameters
1628 * @aggregator: the aggregator we're looking at
1629 *
1630 */
1631static void ad_clear_agg(struct aggregator *aggregator)
1632{
1633 if (aggregator) {
1624db7b 1634 aggregator->is_individual = false;
1da177e4
LT		 1635 aggregator->actor_admin_aggregator_key = 0;
1636 aggregator->actor_oper_aggregator_key = 0;
1637 aggregator->partner_system = null_mac_addr;
1638 aggregator->partner_system_priority = 0;
1639 aggregator->partner_oper_aggregator_key = 0;
1640 aggregator->receive_state = 0;
1641 aggregator->transmit_state = 0;
1642 aggregator->lag_ports = NULL;
1643 aggregator->is_active = 0;
1644 aggregator->num_of_ports = 0;
a4aee5c8
JP		 1645 pr_debug("LAG %d was cleared\n",
1646 aggregator->aggregator_identifier);
1da177e4
LT		 1647 }
1648}
1649
1650/**
1651 * ad_initialize_agg - initialize a given aggregator's parameters
1652 * @aggregator: the aggregator we're looking at
1653 *
1654 */
1655static void ad_initialize_agg(struct aggregator *aggregator)
1656{
1657 if (aggregator) {
1658 ad_clear_agg(aggregator);
1659
1660 aggregator->aggregator_mac_address = null_mac_addr;
1661 aggregator->aggregator_identifier = 0;
1662 aggregator->slave = NULL;
1663 }
1664}
1665
1666/**
1667 * ad_initialize_port - initialize a given port's parameters
1668 * @aggregator: the aggregator we're looking at
1669 * @lacp_fast: boolean. whether fast periodic should be used
1670 *
1671 */
1672static void ad_initialize_port(struct port *port, int lacp_fast)
1673{
c7e703d0
HE		 1674 static const struct port_params tmpl = {
1675 .system_priority = 0xffff,
1676 .key = 1,
1677 .port_number = 1,
1678 .port_priority = 0xff,
1679 .port_state = 1,
1680 };
7addeef6
HE		 1681 static const struct lacpdu lacpdu = {
1682 .subtype = 0x01,
1683 .version_number = 0x01,
1684 .tlv_type_actor_info = 0x01,
1685 .actor_information_length = 0x14,
1686 .tlv_type_partner_info = 0x02,
1687 .partner_information_length = 0x14,
1688 .tlv_type_collector_info = 0x03,
1689 .collector_information_length = 0x10,
1690 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1691 };
c7e703d0 1692
1da177e4
LT		 1693 if (port) {
1694 port->actor_port_number = 1;
1695 port->actor_port_priority = 0xff;
1696 port->actor_system = null_mac_addr;
1697 port->actor_system_priority = 0xffff;
1698 port->actor_port_aggregator_identifier = 0;
d238d458 1699 port->ntt = false;
1da177e4
LT		 1700 port->actor_admin_port_key = 1;
1701 port->actor_oper_port_key = 1;
1702 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1703 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1704
7bfc4753 1705 if (lacp_fast)
1da177e4 1706 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1da177e4 1707
c7e703d0
HE		 1708 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1709 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1710
f48127b6 1711 port->is_enabled = true;
1da177e4
LT		 1712 // ****** private parameters ******
1713 port->sm_vars = 0x3;
1714 port->sm_rx_state = 0;
1715 port->sm_rx_timer_counter = 0;
1716 port->sm_periodic_state = 0;
1717 port->sm_periodic_timer_counter = 0;
1718 port->sm_mux_state = 0;
1719 port->sm_mux_timer_counter = 0;
1720 port->sm_tx_state = 0;
1721 port->sm_tx_timer_counter = 0;
1722 port->slave = NULL;
1723 port->aggregator = NULL;
1724 port->next_port_in_aggregator = NULL;
1725 port->transaction_id = 0;
1726
7addeef6 1727 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1da177e4
LT		 1728 }
1729}
1730
1731/**
1732 * ad_enable_collecting_distributing - enable a port's transmit/receive
1733 * @port: the port we're looking at
1734 *
1735 * Enable @port if it's in an active aggregator
1736 */
1737static void ad_enable_collecting_distributing(struct port *port)
1738{
1739 if (port->aggregator->is_active) {
a4aee5c8
JP		 1740 pr_debug("Enabling port %d(LAG %d)\n",
1741 port->actor_port_number,
1742 port->aggregator->aggregator_identifier);
1da177e4
LT		 1743 __enable_port(port);
1744 }
1745}
1746
1747/**
1748 * ad_disable_collecting_distributing - disable a port's transmit/receive
1749 * @port: the port we're looking at
1750 *
1751 */
1752static void ad_disable_collecting_distributing(struct port *port)
1753{
1754 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
a4aee5c8
JP		 1755 pr_debug("Disabling port %d(LAG %d)\n",
1756 port->actor_port_number,
1757 port->aggregator->aggregator_identifier);
1da177e4
LT		 1758 __disable_port(port);
1759 }
1760}
1761
1762#if 0
1763/**
1764 * ad_marker_info_send - send a marker information frame
1765 * @port: the port we're looking at
1766 *
1767 * This function does nothing since we decided not to implement send and handle
1768 * response for marker PDU's, in this stage, but only to respond to marker
1769 * information.
1770 */
1771static void ad_marker_info_send(struct port *port)
1772{
1c3f0b8e 1773 struct bond_marker marker;
1da177e4
LT		 1774 u16 index;
1775
1776 // fill the marker PDU with the appropriate values
1777 marker.subtype = 0x02;
1778 marker.version_number = 0x01;
1779 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1780 marker.marker_length = 0x16;
1781 // convert requester_port to Big Endian
1782 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1783 marker.requester_system = port->actor_system;
1784 // convert requester_port(u32) to Big Endian
128ea6c3
BD		 1785 marker.requester_transaction_id =
1786 (((++port->transaction_id & 0xFF) << 24)
1787 | ((port->transaction_id & 0xFF00) << 8)
1788 | ((port->transaction_id & 0xFF0000) >> 8)
1789 | ((port->transaction_id & 0xFF000000) >> 24));
1da177e4
LT		 1790 marker.pad = 0;
1791 marker.tlv_type_terminator = 0x00;
1792 marker.terminator_length = 0x00;
128ea6c3
BD		 1793 for (index = 0; index < 90; index++)
1794 marker.reserved_90[index] = 0;
1da177e4
LT		 1795
1796 // send the marker information
1797 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1798 pr_debug("Sent Marker Information on port %d\n",
1799 port->actor_port_number);
1da177e4
LT		 1800 }
1801}
1802#endif
1803
1804/**
1805 * ad_marker_info_received - handle receive of a Marker information frame
1806 * @marker_info: Marker info received
1807 * @port: the port we're looking at
1808 *
1809 */
1c3f0b8e
MD		 1810static void ad_marker_info_received(struct bond_marker *marker_info,
1811 struct port *port)
1da177e4 1812{
1c3f0b8e 1813 struct bond_marker marker;
1da177e4
LT		 1814
1815 // copy the received marker data to the response marker
1816 //marker = *marker_info;
1c3f0b8e 1817 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1da177e4 1818 // change the marker subtype to marker response
128ea6c3 1819 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1da177e4
LT		 1820 // send the marker response
1821
1822 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1823 pr_debug("Sent Marker Response on port %d\n",
1824 port->actor_port_number);
1da177e4
LT		 1825 }
1826}
1827
1828/**
1829 * ad_marker_response_received - handle receive of a marker response frame
1830 * @marker: marker PDU received
1831 * @port: the port we're looking at
1832 *
1833 * This function does nothing since we decided not to implement send and handle
1834 * response for marker PDU's, in this stage, but only to respond to marker
1835 * information.
1836 */
1c3f0b8e
MD		 1837static void ad_marker_response_received(struct bond_marker *marker,
1838 struct port *port)
1da177e4 1839{
128ea6c3
BD		 1840 marker = NULL; /* just to satisfy the compiler */
1841 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 1842 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1843}
1844
1da177e4
LT		 1845//////////////////////////////////////////////////////////////////////////////////////
1846// ================= AD exported functions to the main bonding code ==================
1847//////////////////////////////////////////////////////////////////////////////////////
1848
1849// Check aggregators status in team every T seconds
1850#define AD_AGGREGATOR_SELECTION_TIMER 8
1851
fd989c83
JV		 1852/*
1853 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1854 *
1855 * Set the aggregation selection timer, to initiate an agg selection in
1856 * the very near future. Called during first initialization, and during
1857 * any down to up transitions of the bond.
1858 */
1859void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1860{
1861 BOND_AD_INFO(bond).agg_select_timer = timeout;
fd989c83
JV		 1862}
1863
1da177e4
LT		 1864static u16 aggregator_identifier;
1865
1866/**
1867 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1868 * @bond: bonding struct to work on
1869 * @tick_resolution: tick duration (millisecond resolution)
1da177e4
LT		 1870 *
1871 * Can be called only after the mac address of the bond is set.
1872 */
56d00c67 1873void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
3a6d54c5 1874{
1da177e4 1875 // check that the bond is not initialized yet
3a6d54c5
JP		 1876 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1877 bond->dev->dev_addr)) {
1da177e4
LT		 1878
1879 aggregator_identifier = 0;
1880
1da177e4
LT		 1881 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1882 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1883
1884 // initialize how many times this module is called in one second(should be about every 100ms)
1885 ad_ticks_per_sec = tick_resolution;
1886
fd989c83
JV		 1887 bond_3ad_initiate_agg_selection(bond,
1888 AD_AGGREGATOR_SELECTION_TIMER *
1889 ad_ticks_per_sec);
1da177e4
LT		 1890 }
1891}
1892
1893/**
1894 * bond_3ad_bind_slave - initialize a slave's port
1895 * @slave: slave struct to work on
1896 *
1897 * Returns: 0 on success
1898 * < 0 on error
1899 */
1900int bond_3ad_bind_slave(struct slave *slave)
1901{
1902 struct bonding *bond = bond_get_bond_by_slave(slave);
1903 struct port *port;
1904 struct aggregator *aggregator;
1905
1906 if (bond == NULL) {
a4aee5c8 1907 pr_err("%s: The slave %s is not attached to its bond\n",
471cb5a3 1908 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 1909 return -1;
1910 }
1911
b595076a 1912 //check that the slave has not been initialized yet.
1da177e4
LT		 1913 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1914
1915 // port initialization
1916 port = &(SLAVE_AD_INFO(slave).port);
1917
bf0239a9 1918 ad_initialize_port(port, bond->params.lacp_fast);
1da177e4 1919
e0809dbc 1920 __initialize_port_locks(slave);
1da177e4
LT		 1921 port->slave = slave;
1922 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1923 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1924 // ------------------------------------------------------------
1925 // Port key : | User key | Speed |Duplex|
1926 // ------------------------------------------------------------
1927 // 16 6 1 0
1928 port->actor_admin_port_key = 0; // initialize this parameter
1929 port->actor_admin_port_key |= __get_duplex(port);
1930 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1931 port->actor_oper_port_key = port->actor_admin_port_key;
1932 // if the port is not full duplex, then the port should be not lacp Enabled
7bfc4753 1933 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1934 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1da177e4
LT		 1935 // actor system is the bond's system
1936 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1937 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1938 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1939 port->aggregator = NULL;
1940 port->next_port_in_aggregator = NULL;
1941
1942 __disable_port(port);
1da177e4
LT		 1943
1944 // aggregator initialization
1945 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1946
1947 ad_initialize_agg(aggregator);
1948
1949 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1950 aggregator->aggregator_identifier = (++aggregator_identifier);
1951 aggregator->slave = slave;
1952 aggregator->is_active = 0;
1953 aggregator->num_of_ports = 0;
1954 }
1955
1956 return 0;
1957}
1958
1959/**
1960 * bond_3ad_unbind_slave - deinitialize a slave's port
1961 * @slave: slave struct to work on
1962 *
1963 * Search for the aggregator that is related to this port, remove the
1964 * aggregator and assign another aggregator for other port related to it
1965 * (if any), and remove the port.
1966 */
1967void bond_3ad_unbind_slave(struct slave *slave)
1968{
1969 struct port *port, *prev_port, *temp_port;
1970 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1971 int select_new_active_agg = 0;
a361c83c 1972
1da177e4
LT		 1973 // find the aggregator related to this slave
1974 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1975
1976 // find the port related to this slave
1977 port = &(SLAVE_AD_INFO(slave).port);
1978
1979 // if slave is null, the whole port is not initialized
1980 if (!port->slave) {
a4aee5c8 1981 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
471cb5a3 1982 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 1983 return;
1984 }
1985
a4aee5c8
JP		 1986 pr_debug("Unbinding Link Aggregation Group %d\n",
1987 aggregator->aggregator_identifier);
1da177e4
LT		 1988
1989 /* Tell the partner that this port is not suitable for aggregation */
1990 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1991 __update_lacpdu_from_port(port);
1992 ad_lacpdu_send(port);
1993
1994 // check if this aggregator is occupied
1995 if (aggregator->lag_ports) {
1996 // check if there are other ports related to this aggregator except
1997 // the port related to this slave(thats ensure us that there is a
1998 // reason to search for new aggregator, and that we will find one
1999 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2000 // find new aggregator for the related port(s)
2001 new_aggregator = __get_first_agg(port);
2002 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
fd589a8f 2003 // if the new aggregator is empty, or it is connected to our port only
7bfc4753
BD		 2004 if (!new_aggregator->lag_ports
2005 || ((new_aggregator->lag_ports == port)
2006 && !new_aggregator->lag_ports->next_port_in_aggregator))
1da177e4 2007 break;
1da177e4
LT		 2008 }
2009 // if new aggregator found, copy the aggregator's parameters
2010 // and connect the related lag_ports to the new aggregator
2011 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
a4aee5c8
JP		 2012 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
2013 aggregator->aggregator_identifier,
2014 new_aggregator->aggregator_identifier);
1da177e4
LT		 2015
2016 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
a4aee5c8 2017 pr_info("%s: Removing an active aggregator\n",
471cb5a3 2018 aggregator->slave->bond->dev->name);
1da177e4
LT		 2019 // select new active aggregator
2020 select_new_active_agg = 1;
2021 }
2022
2023 new_aggregator->is_individual = aggregator->is_individual;
2024 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2025 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2026 new_aggregator->partner_system = aggregator->partner_system;
2027 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2028 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2029 new_aggregator->receive_state = aggregator->receive_state;
2030 new_aggregator->transmit_state = aggregator->transmit_state;
2031 new_aggregator->lag_ports = aggregator->lag_ports;
2032 new_aggregator->is_active = aggregator->is_active;
2033 new_aggregator->num_of_ports = aggregator->num_of_ports;
2034
2035 // update the information that is written on the ports about the aggregator
128ea6c3
BD		 2036 for (temp_port = aggregator->lag_ports; temp_port;
2037 temp_port = temp_port->next_port_in_aggregator) {
2038 temp_port->aggregator = new_aggregator;
1da177e4
LT		 2039 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2040 }
2041
2042 // clear the aggregator
2043 ad_clear_agg(aggregator);
a361c83c 2044
7bfc4753 2045 if (select_new_active_agg)
1da177e4 2046 ad_agg_selection_logic(__get_first_agg(port));
1da177e4 2047 } else {
a4aee5c8 2048 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
471cb5a3 2049 slave->bond->dev->name);
1da177e4
LT		 2050 }
2051 } else { // in case that the only port related to this aggregator is the one we want to remove
2052 select_new_active_agg = aggregator->is_active;
2053 // clear the aggregator
2054 ad_clear_agg(aggregator);
2055 if (select_new_active_agg) {
a4aee5c8 2056 pr_info("%s: Removing an active aggregator\n",
471cb5a3 2057 slave->bond->dev->name);
1da177e4
LT		 2058 // select new active aggregator
2059 ad_agg_selection_logic(__get_first_agg(port));
2060 }
2061 }
2062 }
2063
5a03cdb7 2064 pr_debug("Unbinding port %d\n", port->actor_port_number);
1da177e4
LT		 2065 // find the aggregator that this port is connected to
2066 temp_aggregator = __get_first_agg(port);
2067 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2068 prev_port = NULL;
2069 // search the port in the aggregator's related ports
128ea6c3
BD		 2070 for (temp_port = temp_aggregator->lag_ports; temp_port;
2071 prev_port = temp_port,
2072 temp_port = temp_port->next_port_in_aggregator) {
1da177e4 2073 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
7bfc4753 2074 if (prev_port)
1da177e4 2075 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
7bfc4753 2076 else
1da177e4 2077 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
1da177e4 2078 temp_aggregator->num_of_ports--;
128ea6c3 2079 if (temp_aggregator->num_of_ports == 0) {
1da177e4
LT		 2080 select_new_active_agg = temp_aggregator->is_active;
2081 // clear the aggregator
2082 ad_clear_agg(temp_aggregator);
2083 if (select_new_active_agg) {
a4aee5c8 2084 pr_info("%s: Removing an active aggregator\n",
471cb5a3 2085 slave->bond->dev->name);
1da177e4
LT		 2086 // select new active aggregator
2087 ad_agg_selection_logic(__get_first_agg(port));
2088 }
2089 }
2090 break;
2091 }
2092 }
2093 }
128ea6c3 2094 port->slave = NULL;
1da177e4
LT		 2095}
2096
2097/**
2098 * bond_3ad_state_machine_handler - handle state machines timeout
2099 * @bond: bonding struct to work on
2100 *
2101 * The state machine handling concept in this module is to check every tick
2102 * which state machine should operate any function. The execution order is
2103 * round robin, so when we have an interaction between state machines, the
2104 * reply of one to each other might be delayed until next tick.
2105 *
2106 * This function also complete the initialization when the agg_select_timer
2107 * times out, and it selects an aggregator for the ports that are yet not
2108 * related to any aggregator, and selects the active aggregator for a bond.
2109 */
1b76b316 2110void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2111{
1b76b316
JV		 2112 struct bonding *bond = container_of(work, struct bonding,
2113 ad_work.work);
1da177e4
LT		 2114 struct port *port;
2115 struct aggregator *aggregator;
2116
2117 read_lock(&bond->lock);
2118
1da177e4 2119 //check if there are any slaves
dec1e90e 2120 if (list_empty(&bond->slave_list))
1da177e4 2121 goto re_arm;
1da177e4
LT		 2122
2123 // check if agg_select_timer timer after initialize is timed out
2124 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2125 // select the active aggregator for the bond
2126 if ((port = __get_first_port(bond))) {
2127 if (!port->slave) {
a4aee5c8
JP		 2128 pr_warning("%s: Warning: bond's first port is uninitialized\n",
2129 bond->dev->name);
1da177e4
LT		 2130 goto re_arm;
2131 }
2132
2133 aggregator = __get_first_agg(port);
2134 ad_agg_selection_logic(aggregator);
2135 }
f0c76d61 2136 bond_3ad_set_carrier(bond);
1da177e4
LT		 2137 }
2138
2139 // for each port run the state machines
2140 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2141 if (!port->slave) {
a4aee5c8
JP		 2142 pr_warning("%s: Warning: Found an uninitialized port\n",
2143 bond->dev->name);
1da177e4
LT		 2144 goto re_arm;
2145 }
2146
16d79d7d
NC		 2147 /* Lock around state machines to protect data accessed
2148 * by all (e.g., port->sm_vars). ad_rx_machine may run
2149 * concurrently due to incoming LACPDU.
2150 */
9ac3524a 2151 __get_state_machine_lock(port);
16d79d7d 2152
1da177e4
LT		 2153 ad_rx_machine(NULL, port);
2154 ad_periodic_machine(port);
2155 ad_port_selection_logic(port);
2156 ad_mux_machine(port);
2157 ad_tx_machine(port);
2158
2159 // turn off the BEGIN bit, since we already handled it
7bfc4753 2160 if (port->sm_vars & AD_PORT_BEGIN)
1da177e4 2161 port->sm_vars &= ~AD_PORT_BEGIN;
16d79d7d 2162
9ac3524a 2163 __release_state_machine_lock(port);
1da177e4
LT		 2164 }
2165
2166re_arm:
e6d265e8
JV		 2167 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
2168
1da177e4
LT		 2169 read_unlock(&bond->lock);
2170}
2171
2172/**
2173 * bond_3ad_rx_indication - handle a received frame
2174 * @lacpdu: received lacpdu
2175 * @slave: slave struct to work on
2176 * @length: length of the data received
2177 *
2178 * It is assumed that frames that were sent on this NIC don't returned as new
2179 * received frames (loopback). Since only the payload is given to this
2180 * function, it check for loopback.
2181 */
13a8e0c8 2182static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
1da177e4
LT		 2183{
2184 struct port *port;
13a8e0c8 2185 int ret = RX_HANDLER_ANOTHER;
1da177e4
LT		 2186
2187 if (length >= sizeof(struct lacpdu)) {
2188
2189 port = &(SLAVE_AD_INFO(slave).port);
2190
2191 if (!port->slave) {
a4aee5c8 2192 pr_warning("%s: Warning: port of slave %s is uninitialized\n",
471cb5a3 2193 slave->dev->name, slave->bond->dev->name);
13a8e0c8 2194 return ret;
1da177e4
LT		 2195 }
2196
2197 switch (lacpdu->subtype) {
2198 case AD_TYPE_LACPDU:
13a8e0c8 2199 ret = RX_HANDLER_CONSUMED;
a4aee5c8
JP		 2200 pr_debug("Received LACPDU on port %d\n",
2201 port->actor_port_number);
16d79d7d 2202 /* Protect against concurrent state machines */
9ac3524a 2203 __get_state_machine_lock(port);
1da177e4 2204 ad_rx_machine(lacpdu, port);
9ac3524a 2205 __release_state_machine_lock(port);
1da177e4
LT		 2206 break;
2207
2208 case AD_TYPE_MARKER:
13a8e0c8 2209 ret = RX_HANDLER_CONSUMED;
1da177e4
LT		 2210 // No need to convert fields to Little Endian since we don't use the marker's fields.
2211
1c3f0b8e 2212 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2213 case AD_MARKER_INFORMATION_SUBTYPE:
a4aee5c8
JP		 2214 pr_debug("Received Marker Information on port %d\n",
2215 port->actor_port_number);
1c3f0b8e 2216 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2217 break;
2218
2219 case AD_MARKER_RESPONSE_SUBTYPE:
a4aee5c8
JP		 2220 pr_debug("Received Marker Response on port %d\n",
2221 port->actor_port_number);
1c3f0b8e 2222 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2223 break;
2224
2225 default:
a4aee5c8
JP		 2226 pr_debug("Received an unknown Marker subtype on slot %d\n",
2227 port->actor_port_number);
1da177e4
LT		 2228 }
2229 }
2230 }
13a8e0c8 2231 return ret;
1da177e4
LT		 2232}
2233
2234/**
2235 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2236 * @slave: slave struct to work on
2237 *
2238 * Handle reselection of aggregator (if needed) for this port.
2239 */
2240void bond_3ad_adapter_speed_changed(struct slave *slave)
2241{
2242 struct port *port;
2243
2244 port = &(SLAVE_AD_INFO(slave).port);
2245
2246 // if slave is null, the whole port is not initialized
2247 if (!port->slave) {
a4aee5c8 2248 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
471cb5a3 2249 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2250 return;
2251 }
2252
2253 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2254 port->actor_oper_port_key = port->actor_admin_port_key |=
2255 (__get_link_speed(port) << 1);
5a03cdb7 2256 pr_debug("Port %d changed speed\n", port->actor_port_number);
1da177e4
LT		 2257 // there is no need to reselect a new aggregator, just signal the
2258 // state machines to reinitialize
2259 port->sm_vars |= AD_PORT_BEGIN;
2260}
2261
2262/**
2263 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2264 * @slave: slave struct to work on
2265 *
2266 * Handle reselection of aggregator (if needed) for this port.
2267 */
2268void bond_3ad_adapter_duplex_changed(struct slave *slave)
2269{
2270 struct port *port;
2271
128ea6c3 2272 port = &(SLAVE_AD_INFO(slave).port);
1da177e4
LT		 2273
2274 // if slave is null, the whole port is not initialized
2275 if (!port->slave) {
a4aee5c8 2276 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
471cb5a3 2277 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2278 return;
2279 }
2280
2281 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2282 port->actor_oper_port_key = port->actor_admin_port_key |=
2283 __get_duplex(port);
5a03cdb7 2284 pr_debug("Port %d changed duplex\n", port->actor_port_number);
1da177e4
LT		 2285 // there is no need to reselect a new aggregator, just signal the
2286 // state machines to reinitialize
2287 port->sm_vars |= AD_PORT_BEGIN;
2288}
2289
2290/**
2291 * bond_3ad_handle_link_change - handle a slave's link status change indication
2292 * @slave: slave struct to work on
2293 * @status: whether the link is now up or down
2294 *
2295 * Handle reselection of aggregator (if needed) for this port.
2296 */
2297void bond_3ad_handle_link_change(struct slave *slave, char link)
2298{
2299 struct port *port;
2300
2301 port = &(SLAVE_AD_INFO(slave).port);
2302
2303 // if slave is null, the whole port is not initialized
2304 if (!port->slave) {
a4aee5c8 2305 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
471cb5a3 2306 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2307 return;
2308 }
2309
2310 // 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)
2311 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2312 if (link == BOND_LINK_UP) {
f48127b6 2313 port->is_enabled = true;
1da177e4 2314 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2315 port->actor_oper_port_key = port->actor_admin_port_key |=
2316 __get_duplex(port);
1da177e4 2317 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2318 port->actor_oper_port_key = port->actor_admin_port_key |=
2319 (__get_link_speed(port) << 1);
1da177e4
LT		 2320 } else {
2321 /* link has failed */
f48127b6 2322 port->is_enabled = false;
1da177e4 2323 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2324 port->actor_oper_port_key = (port->actor_admin_port_key &=
2325 ~AD_SPEED_KEY_BITS);
1da177e4
LT		 2326 }
2327 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2328 // there is no need to reselect a new aggregator, just signal the
2329 // state machines to reinitialize
2330 port->sm_vars |= AD_PORT_BEGIN;
2331}
2332
ff59c456 2333/*
a361c83c 2334 * set link state for bonding master: if we have an active
ff59c456
JV		 2335 * aggregator, we're up, if not, we're down. Presumes that we cannot
2336 * have an active aggregator if there are no slaves with link up.
2337 *
031ae4de
JV		 2338 * This behavior complies with IEEE 802.3 section 43.3.9.
2339 *
ff59c456
JV		 2340 * Called by bond_set_carrier(). Return zero if carrier state does not
2341 * change, nonzero if it does.
2342 */
2343int bond_3ad_set_carrier(struct bonding *bond)
2344{
655f8919 2345 struct aggregator *active;
dec1e90e 2346 struct slave *first_slave;
655f8919 2347
dec1e90e 2348 first_slave = bond_first_slave(bond);
2349 if (!first_slave)
2350 return 0;
2351 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator));
655f8919 2352 if (active) {
2353 /* are enough slaves available to consider link up? */
2354 if (active->num_of_ports < bond->params.min_links) {
2355 if (netif_carrier_ok(bond->dev)) {
2356 netif_carrier_off(bond->dev);
2357 return 1;
2358 }
2359 } else if (!netif_carrier_ok(bond->dev)) {
ff59c456
JV		 2360 netif_carrier_on(bond->dev);
2361 return 1;
2362 }
2363 return 0;
2364 }
2365
2366 if (netif_carrier_ok(bond->dev)) {
2367 netif_carrier_off(bond->dev);
2368 return 1;
2369 }
2370 return 0;
2371}
2372
1da177e4 2373/**
318debd8 2374 * __bond_3ad_get_active_agg_info - get information of the active aggregator
1da177e4
LT		 2375 * @bond: bonding struct to work on
2376 * @ad_info: ad_info struct to fill with the bond's info
2377 *
2378 * Returns: 0 on success
2379 * < 0 on error
2380 */
318debd8 2381int __bond_3ad_get_active_agg_info(struct bonding *bond,
2382 struct ad_info *ad_info)
1da177e4
LT		 2383{
2384 struct aggregator *aggregator = NULL;
2385 struct port *port;
2386
2387 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2388 if (port->aggregator && port->aggregator->is_active) {
2389 aggregator = port->aggregator;
2390 break;
2391 }
2392 }
2393
2394 if (aggregator) {
2395 ad_info->aggregator_id = aggregator->aggregator_identifier;
2396 ad_info->ports = aggregator->num_of_ports;
2397 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2398 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2399 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2400 return 0;
2401 }
2402
2403 return -1;
2404}
2405
318debd8 2406/* Wrapper used to hold bond->lock so no slave manipulation can occur */
2407int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2408{
2409 int ret;
2410
2411 read_lock(&bond->lock);
2412 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
2413 read_unlock(&bond->lock);
2414
2415 return ret;
2416}
2417
1da177e4
LT		 2418int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2419{
2420 struct slave *slave, *start_at;
454d7c9b 2421 struct bonding *bond = netdev_priv(dev);
1da177e4
LT		 2422 int slave_agg_no;
2423 int slaves_in_agg;
2424 int agg_id;
2425 int i;
2426 struct ad_info ad_info;
2427 int res = 1;
2428
278b2083 2429 read_lock(&bond->lock);
318debd8 2430 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
2431 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
a4aee5c8 2432 dev->name);
1da177e4
LT		 2433 goto out;
2434 }
2435
2436 slaves_in_agg = ad_info.ports;
2437 agg_id = ad_info.aggregator_id;
2438
2439 if (slaves_in_agg == 0) {
2440 /*the aggregator is empty*/
a4aee5c8 2441 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
1da177e4
LT		 2442 goto out;
2443 }
2444
a361c83c 2445 slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
1da177e4 2446
dec1e90e 2447 bond_for_each_slave(bond, slave) {
1da177e4
LT		 2448 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2449
2450 if (agg && (agg->aggregator_identifier == agg_id)) {
2451 slave_agg_no--;
7bfc4753 2452 if (slave_agg_no < 0)
1da177e4 2453 break;
1da177e4
LT		 2454 }
2455 }
2456
2457 if (slave_agg_no >= 0) {
a4aee5c8
JP		 2458 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2459 dev->name, agg_id);
1da177e4
LT		 2460 goto out;
2461 }
2462
2463 start_at = slave;
2464
2465 bond_for_each_slave_from(bond, slave, i, start_at) {
2466 int slave_agg_id = 0;
2467 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2468
7bfc4753 2469 if (agg)
1da177e4 2470 slave_agg_id = agg->aggregator_identifier;
1da177e4
LT		 2471
2472 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2473 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2474 break;
2475 }
2476 }
2477
2478out:
278b2083 2479 read_unlock(&bond->lock);
1da177e4
LT		 2480 if (res) {
2481 /* no suitable interface, frame not sent */
04502430 2482 kfree_skb(skb);
1da177e4 2483 }
0693e88e 2484
ec634fe3 2485 return NETDEV_TX_OK;
1da177e4
LT		 2486}
2487
de063b70
ED		 2488int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2489 struct slave *slave)
1da177e4 2490{
13a8e0c8 2491 int ret = RX_HANDLER_ANOTHER;
de063b70
ED		 2492 struct lacpdu *lacpdu, _lacpdu;
2493
3aba891d 2494 if (skb->protocol != PKT_TYPE_LACPDU)
13a8e0c8 2495 return ret;
b3053251 2496
de063b70
ED		 2497 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2498 if (!lacpdu)
13a8e0c8 2499 return ret;
ab12811c 2500
1da177e4 2501 read_lock(&bond->lock);
de063b70 2502 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len);
1da177e4 2503 read_unlock(&bond->lock);
13a8e0c8 2504 return ret;
1da177e4 2505}
ba824a8b
PP		 2506
2507/*
2508 * When modify lacp_rate parameter via sysfs,
2509 * update actor_oper_port_state of each port.
2510 *
2511 * Hold slave->state_machine_lock,
2512 * so we can modify port->actor_oper_port_state,
2513 * no matter bond is up or down.
2514 */
2515void bond_3ad_update_lacp_rate(struct bonding *bond)
2516{
ba824a8b
PP		 2517 struct slave *slave;
2518 struct port *port = NULL;
2519 int lacp_fast;
2520
b59340c2 2521 write_lock_bh(&bond->lock);
ba824a8b
PP		 2522 lacp_fast = bond->params.lacp_fast;
2523
dec1e90e 2524 bond_for_each_slave(bond, slave) {
ba824a8b 2525 port = &(SLAVE_AD_INFO(slave).port);
b59340c2 2526 if (port->slave == NULL)
2527 continue;
ba824a8b
PP		 2528 __get_state_machine_lock(port);
2529 if (lacp_fast)
2530 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2531 else
2532 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2533 __release_state_machine_lock(port);
2534 }
2535
b59340c2 2536 write_unlock_bh(&bond->lock);
ba824a8b 2537}
Linux kernel - Deliverables
This page took 1.006943 seconds and 5 git commands to generate.