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Merge branch 'r8152'
[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
1da177e4
LT		 138/**
139 * __get_first_agg - get the first aggregator in the bond
140 * @bond: the bond we're looking at
141 *
142 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
143 * found.
144 */
145static inline struct aggregator *__get_first_agg(struct port *port)
146{
147 struct bonding *bond = __get_bond_by_port(port);
dec1e90e 148 struct slave *first_slave;
1da177e4 149
be79bd04 150 /* If there's no bond for this port, or bond has no slaves */
dec1e90e 151 if (bond == NULL)
1da177e4 152 return NULL;
be79bd04 153 rcu_read_lock();
154 first_slave = bond_first_slave_rcu(bond);
155 rcu_read_unlock();
dec1e90e 156 return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL;
1da177e4
LT		 157}
158
fd989c83
JV		 159/*
160 * __agg_has_partner
161 *
162 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
163 * address for the partner). Return 0 if not.
164 */
165static inline int __agg_has_partner(struct aggregator *agg)
166{
167 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
168}
169
1da177e4
LT		 170/**
171 * __disable_port - disable the port's slave
172 * @port: the port we're looking at
173 *
174 */
175static inline void __disable_port(struct port *port)
176{
177 bond_set_slave_inactive_flags(port->slave);
178}
179
180/**
181 * __enable_port - enable the port's slave, if it's up
182 * @port: the port we're looking at
183 *
184 */
185static inline void __enable_port(struct port *port)
186{
187 struct slave *slave = port->slave;
188
7bfc4753 189 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
1da177e4 190 bond_set_slave_active_flags(slave);
1da177e4
LT		 191}
192
193/**
194 * __port_is_enabled - check if the port's slave is in active state
195 * @port: the port we're looking at
196 *
197 */
198static inline int __port_is_enabled(struct port *port)
199{
e30bc066 200 return bond_is_active_slave(port->slave);
1da177e4
LT		 201}
202
203/**
204 * __get_agg_selection_mode - get the aggregator selection mode
205 * @port: the port we're looking at
206 *
fd989c83 207 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 208 */
209static inline u32 __get_agg_selection_mode(struct port *port)
210{
211 struct bonding *bond = __get_bond_by_port(port);
212
7bfc4753 213 if (bond == NULL)
fd989c83 214 return BOND_AD_STABLE;
1da177e4 215
1a14fbcb 216 return bond->params.ad_select;
1da177e4
LT		 217}
218
219/**
220 * __check_agg_selection_timer - check if the selection timer has expired
221 * @port: the port we're looking at
222 *
223 */
224static inline int __check_agg_selection_timer(struct port *port)
225{
226 struct bonding *bond = __get_bond_by_port(port);
227
7bfc4753 228 if (bond == NULL)
1da177e4 229 return 0;
1da177e4
LT		 230
231 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
232}
233
234/**
9ac3524a 235 * __get_state_machine_lock - lock the port's state machines
1da177e4
LT		 236 * @port: the port we're looking at
237 *
238 */
9ac3524a 239static inline void __get_state_machine_lock(struct port *port)
1da177e4 240{
9ac3524a 241 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 242}
243
244/**
9ac3524a 245 * __release_state_machine_lock - unlock the port's state machines
1da177e4
LT		 246 * @port: the port we're looking at
247 *
248 */
9ac3524a 249static inline void __release_state_machine_lock(struct port *port)
1da177e4 250{
9ac3524a 251 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 252}
253
254/**
255 * __get_link_speed - get a port's speed
256 * @port: the port we're looking at
257 *
258 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
259 * 0,
260 * %AD_LINK_SPEED_BITMASK_10MBPS,
261 * %AD_LINK_SPEED_BITMASK_100MBPS,
94dbffd5
JV		 262 * %AD_LINK_SPEED_BITMASK_1000MBPS,
263 * %AD_LINK_SPEED_BITMASK_10000MBPS
1da177e4
LT		 264 */
265static u16 __get_link_speed(struct port *port)
266{
267 struct slave *slave = port->slave;
268 u16 speed;
269
270 /* this if covers only a special case: when the configuration starts with
271 * link down, it sets the speed to 0.
272 * This is done in spite of the fact that the e100 driver reports 0 to be
273 * compatible with MVT in the future.*/
7bfc4753 274 if (slave->link != BOND_LINK_UP)
128ea6c3 275 speed = 0;
7bfc4753 276 else {
1da177e4
LT		 277 switch (slave->speed) {
278 case SPEED_10:
279 speed = AD_LINK_SPEED_BITMASK_10MBPS;
280 break;
281
282 case SPEED_100:
283 speed = AD_LINK_SPEED_BITMASK_100MBPS;
284 break;
285
286 case SPEED_1000:
287 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
288 break;
289
94dbffd5
JV		 290 case SPEED_10000:
291 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
292 break;
293
1da177e4
LT		 294 default:
295 speed = 0; // unknown speed value from ethtool. shouldn't happen
296 break;
297 }
298 }
299
a4aee5c8
JP		 300 pr_debug("Port %d Received link speed %d update from adapter\n",
301 port->actor_port_number, speed);
1da177e4
LT		 302 return speed;
303}
304
305/**
306 * __get_duplex - get a port's duplex
307 * @port: the port we're looking at
308 *
309 * Return @port's duplex in 802.3ad bitmask format. i.e.:
310 * 0x01 if in full duplex
311 * 0x00 otherwise
312 */
313static u8 __get_duplex(struct port *port)
314{
315 struct slave *slave = port->slave;
316
317 u8 retval;
318
319 // handling a special case: when the configuration starts with
320 // link down, it sets the duplex to 0.
7bfc4753 321 if (slave->link != BOND_LINK_UP)
128ea6c3 322 retval = 0x0;
7bfc4753 323 else {
1da177e4
LT		 324 switch (slave->duplex) {
325 case DUPLEX_FULL:
128ea6c3 326 retval = 0x1;
a4aee5c8
JP		 327 pr_debug("Port %d Received status full duplex update from adapter\n",
328 port->actor_port_number);
1da177e4
LT		 329 break;
330 case DUPLEX_HALF:
331 default:
128ea6c3 332 retval = 0x0;
a4aee5c8
JP		 333 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
334 port->actor_port_number);
1da177e4
LT		 335 break;
336 }
337 }
338 return retval;
339}
340
341/**
9ac3524a 342 * __initialize_port_locks - initialize a port's STATE machine spinlock
e0809dbc 343 * @port: the slave of the port we're looking at
1da177e4
LT		 344 *
345 */
e0809dbc 346static inline void __initialize_port_locks(struct slave *slave)
1da177e4
LT		 347{
348 // make sure it isn't called twice
e0809dbc 349 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock));
1da177e4
LT		 350}
351
352//conversions
1da177e4
LT		 353
354/**
355 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
356 * @timer_type: which timer to operate
357 * @par: timer parameter. see below
358 *
359 * If @timer_type is %current_while_timer, @par indicates long/short timer.
360 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
361 * %SLOW_PERIODIC_TIME.
362 */
363static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
364{
128ea6c3 365 u16 retval = 0; /* to silence the compiler */
1da177e4
LT		 366
367 switch (timer_type) {
368 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
7bfc4753 369 if (par)
1da177e4 370 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
7bfc4753 371 else
1da177e4 372 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
1da177e4
LT		 373 break;
374 case AD_ACTOR_CHURN_TIMER: // for local churn machine
375 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
376 break;
377 case AD_PERIODIC_TIMER: // for periodic machine
378 retval = (par*ad_ticks_per_sec); // long timeout
379 break;
380 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
381 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
382 break;
383 case AD_WAIT_WHILE_TIMER: // for selection machine
384 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
385 break;
386 }
387 return retval;
388}
389
390
391/////////////////////////////////////////////////////////////////////////////////
392// ================= ad_rx_machine helper functions ==================
393/////////////////////////////////////////////////////////////////////////////////
394
2d6682db
JV		 395/**
396 * __choose_matched - update a port's matched variable from a received lacpdu
397 * @lacpdu: the lacpdu we've received
398 * @port: the port we're looking at
399 *
400 * Update the value of the matched variable, using parameter values from a
401 * newly received lacpdu. Parameter values for the partner carried in the
402 * received PDU are compared with the corresponding operational parameter
403 * values for the actor. Matched is set to TRUE if all of these parameters
404 * match and the PDU parameter partner_state.aggregation has the same value as
405 * actor_oper_port_state.aggregation and lacp will actively maintain the link
406 * in the aggregation. Matched is also set to TRUE if the value of
407 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
408 * an individual link and lacp will actively maintain the link. Otherwise,
409 * matched is set to FALSE. LACP is considered to be actively maintaining the
410 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
411 * the actor's actor_oper_port_state.lacp_activity and the PDU's
412 * partner_state.lacp_activity variables are TRUE.
413 *
414 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
415 * used here to implement the language from 802.3ad 43.4.9 that requires
416 * recordPDU to "match" the LACPDU parameters to the stored values.
417 */
418static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
419{
420 // check if all parameters are alike
421 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
422 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
423 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
424 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
425 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
426 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
427 // or this is individual link(aggregation == FALSE)
428 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
429 ) {
430 // update the state machine Matched variable
431 port->sm_vars |= AD_PORT_MATCHED;
432 } else {
433 port->sm_vars &= ~AD_PORT_MATCHED;
434 }
435}
436
1da177e4
LT		 437/**
438 * __record_pdu - record parameters from a received lacpdu
439 * @lacpdu: the lacpdu we've received
440 * @port: the port we're looking at
441 *
442 * Record the parameter values for the Actor carried in a received lacpdu as
443 * the current partner operational parameter values and sets
444 * actor_oper_port_state.defaulted to FALSE.
445 */
446static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
447{
1da177e4 448 if (lacpdu && port) {
b99d6ba9
HE		 449 struct port_params *partner = &port->partner_oper;
450
2d6682db 451 __choose_matched(lacpdu, port);
1da177e4 452 // record the new parameter values for the partner operational
b99d6ba9
HE		 453 partner->port_number = ntohs(lacpdu->actor_port);
454 partner->port_priority = ntohs(lacpdu->actor_port_priority);
455 partner->system = lacpdu->actor_system;
456 partner->system_priority = ntohs(lacpdu->actor_system_priority);
457 partner->key = ntohs(lacpdu->actor_key);
458 partner->port_state = lacpdu->actor_state;
1da177e4
LT		 459
460 // set actor_oper_port_state.defaulted to FALSE
461 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
462
463 // set the partner sync. to on if the partner is sync. and the port is matched
7bfc4753
BD		 464 if ((port->sm_vars & AD_PORT_MATCHED)
465 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
b99d6ba9 466 partner->port_state |= AD_STATE_SYNCHRONIZATION;
7bfc4753 467 else
b99d6ba9 468 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 469 }
470}
471
472/**
473 * __record_default - record default parameters
474 * @port: the port we're looking at
475 *
476 * This function records the default parameter values for the partner carried
477 * in the Partner Admin parameters as the current partner operational parameter
478 * values and sets actor_oper_port_state.defaulted to TRUE.
479 */
480static void __record_default(struct port *port)
481{
1da177e4
LT		 482 if (port) {
483 // record the partner admin parameters
5eefd1ad
HE		 484 memcpy(&port->partner_oper, &port->partner_admin,
485 sizeof(struct port_params));
1da177e4
LT		 486
487 // set actor_oper_port_state.defaulted to true
488 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
489 }
490}
491
492/**
493 * __update_selected - update a port's Selected variable from a received lacpdu
494 * @lacpdu: the lacpdu we've received
495 * @port: the port we're looking at
496 *
497 * Update the value of the selected variable, using parameter values from a
498 * newly received lacpdu. The parameter values for the Actor carried in the
499 * received PDU are compared with the corresponding operational parameter
500 * values for the ports partner. If one or more of the comparisons shows that
501 * the value(s) received in the PDU differ from the current operational values,
502 * then selected is set to FALSE and actor_oper_port_state.synchronization is
503 * set to out_of_sync. Otherwise, selected remains unchanged.
504 */
505static void __update_selected(struct lacpdu *lacpdu, struct port *port)
506{
1da177e4 507 if (lacpdu && port) {
ce6a49ad
HE		 508 const struct port_params *partner = &port->partner_oper;
509
1da177e4 510 // check if any parameter is different
8e95a202
JP		 511 if (ntohs(lacpdu->actor_port) != partner->port_number ||
512 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
513 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
514 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
515 ntohs(lacpdu->actor_key) != partner->key ||
516 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 517 // update the state machine Selected variable
518 port->sm_vars &= ~AD_PORT_SELECTED;
519 }
520 }
521}
522
523/**
524 * __update_default_selected - update a port's Selected variable from Partner
525 * @port: the port we're looking at
526 *
527 * This function updates the value of the selected variable, using the partner
528 * administrative parameter values. The administrative values are compared with
529 * the corresponding operational parameter values for the partner. If one or
530 * more of the comparisons shows that the administrative value(s) differ from
531 * the current operational values, then Selected is set to FALSE and
532 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
533 * Selected remains unchanged.
534 */
535static void __update_default_selected(struct port *port)
536{
1da177e4 537 if (port) {
3c52065f
HE		 538 const struct port_params *admin = &port->partner_admin;
539 const struct port_params *oper = &port->partner_oper;
540
1da177e4 541 // check if any parameter is different
8e95a202
JP		 542 if (admin->port_number != oper->port_number ||
543 admin->port_priority != oper->port_priority ||
544 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
545 admin->system_priority != oper->system_priority ||
546 admin->key != oper->key ||
547 (admin->port_state & AD_STATE_AGGREGATION)
3c52065f 548 != (oper->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 549 // update the state machine Selected variable
550 port->sm_vars &= ~AD_PORT_SELECTED;
551 }
552 }
553}
554
1da177e4
LT		 555/**
556 * __update_ntt - update a port's ntt variable from a received lacpdu
557 * @lacpdu: the lacpdu we've received
558 * @port: the port we're looking at
559 *
560 * Updates the value of the ntt variable, using parameter values from a newly
561 * received lacpdu. The parameter values for the partner carried in the
562 * received PDU are compared with the corresponding operational parameter
563 * values for the Actor. If one or more of the comparisons shows that the
564 * value(s) received in the PDU differ from the current operational values,
565 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
566 */
567static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
568{
569 // validate lacpdu and port
570 if (lacpdu && port) {
571 // check if any parameter is different
89cc76f9
JV		 572 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
573 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
1da177e4 574 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 575 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
576 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 577 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
578 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
579 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
580 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
581 ) {
d238d458
HE		 582
583 port->ntt = true;
1da177e4
LT		 584 }
585 }
586}
587
588/**
589 * __attach_bond_to_agg
590 * @port: the port we're looking at
591 *
592 * Handle the attaching of the port's control parser/multiplexer and the
593 * aggregator. This function does nothing since the parser/multiplexer of the
594 * receive and the parser/multiplexer of the aggregator are already combined.
595 */
596static void __attach_bond_to_agg(struct port *port)
597{
128ea6c3 598 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 599 // This function does nothing since the parser/multiplexer of the receive
600 // and the parser/multiplexer of the aggregator are already combined
601}
602
603/**
604 * __detach_bond_from_agg
605 * @port: the port we're looking at
606 *
607 * Handle the detaching of the port's control parser/multiplexer from the
608 * aggregator. This function does nothing since the parser/multiplexer of the
609 * receive and the parser/multiplexer of the aggregator are already combined.
610 */
611static void __detach_bond_from_agg(struct port *port)
612{
128ea6c3 613 port = NULL; /* just to satisfy the compiler */
b9d6d2db 614 // This function does nothing since the parser/multiplexer of the receive
1da177e4
LT		 615 // and the parser/multiplexer of the aggregator are already combined
616}
617
618/**
619 * __agg_ports_are_ready - check if all ports in an aggregator are ready
620 * @aggregator: the aggregator we're looking at
621 *
622 */
623static int __agg_ports_are_ready(struct aggregator *aggregator)
624{
625 struct port *port;
626 int retval = 1;
627
628 if (aggregator) {
629 // scan all ports in this aggregator to verfy if they are all ready
128ea6c3
BD		 630 for (port = aggregator->lag_ports;
631 port;
632 port = port->next_port_in_aggregator) {
1da177e4
LT		 633 if (!(port->sm_vars & AD_PORT_READY_N)) {
634 retval = 0;
635 break;
636 }
637 }
638 }
639
640 return retval;
641}
642
643/**
644 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
645 * @aggregator: the aggregator we're looking at
646 * @val: Should the ports' ready bit be set on or off
647 *
648 */
649static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
650{
651 struct port *port;
652
128ea6c3
BD		 653 for (port = aggregator->lag_ports; port;
654 port = port->next_port_in_aggregator) {
7bfc4753 655 if (val)
1da177e4 656 port->sm_vars |= AD_PORT_READY;
7bfc4753 657 else
1da177e4 658 port->sm_vars &= ~AD_PORT_READY;
1da177e4
LT		 659 }
660}
661
662/**
663 * __get_agg_bandwidth - get the total bandwidth of an aggregator
664 * @aggregator: the aggregator we're looking at
665 *
666 */
667static u32 __get_agg_bandwidth(struct aggregator *aggregator)
668{
128ea6c3 669 u32 bandwidth = 0;
1da177e4
LT		 670
671 if (aggregator->num_of_ports) {
65cce19c 672 switch (__get_link_speed(aggregator->lag_ports)) {
1da177e4
LT		 673 case AD_LINK_SPEED_BITMASK_1MBPS:
674 bandwidth = aggregator->num_of_ports;
675 break;
676 case AD_LINK_SPEED_BITMASK_10MBPS:
677 bandwidth = aggregator->num_of_ports * 10;
678 break;
679 case AD_LINK_SPEED_BITMASK_100MBPS:
680 bandwidth = aggregator->num_of_ports * 100;
681 break;
682 case AD_LINK_SPEED_BITMASK_1000MBPS:
683 bandwidth = aggregator->num_of_ports * 1000;
684 break;
94dbffd5
JV		 685 case AD_LINK_SPEED_BITMASK_10000MBPS:
686 bandwidth = aggregator->num_of_ports * 10000;
687 break;
1da177e4 688 default:
128ea6c3 689 bandwidth = 0; /*to silence the compiler ....*/
1da177e4
LT		 690 }
691 }
692 return bandwidth;
693}
694
695/**
696 * __get_active_agg - get the current active aggregator
697 * @aggregator: the aggregator we're looking at
698 *
699 */
700static struct aggregator *__get_active_agg(struct aggregator *aggregator)
701{
19177e7d
VF		 702 struct bonding *bond = aggregator->slave->bond;
703 struct list_head *iter;
704 struct slave *slave;
1da177e4 705
be79bd04 706 rcu_read_lock();
707 bond_for_each_slave_rcu(bond, slave, iter)
708 if (SLAVE_AD_INFO(slave).aggregator.is_active) {
709 rcu_read_unlock();
19177e7d 710 return &(SLAVE_AD_INFO(slave).aggregator);
be79bd04 711 }
712 rcu_read_unlock();
1da177e4 713
19177e7d 714 return NULL;
1da177e4
LT		 715}
716
717/**
718 * __update_lacpdu_from_port - update a port's lacpdu fields
719 * @port: the port we're looking at
720 *
721 */
722static inline void __update_lacpdu_from_port(struct port *port)
723{
724 struct lacpdu *lacpdu = &port->lacpdu;
3b5b35d0 725 const struct port_params *partner = &port->partner_oper;
1da177e4
LT		 726
727 /* update current actual Actor parameters */
728 /* lacpdu->subtype initialized
729 * lacpdu->version_number initialized
730 * lacpdu->tlv_type_actor_info initialized
731 * lacpdu->actor_information_length initialized
732 */
733
d3bb52b0 734 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 735 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 736 lacpdu->actor_key = htons(port->actor_oper_port_key);
737 lacpdu->actor_port_priority = htons(port->actor_port_priority);
738 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4
LT		 739 lacpdu->actor_state = port->actor_oper_port_state;
740
741 /* lacpdu->reserved_3_1 initialized
742 * lacpdu->tlv_type_partner_info initialized
743 * lacpdu->partner_information_length initialized
744 */
745
3b5b35d0
HE		 746 lacpdu->partner_system_priority = htons(partner->system_priority);
747 lacpdu->partner_system = partner->system;
748 lacpdu->partner_key = htons(partner->key);
749 lacpdu->partner_port_priority = htons(partner->port_priority);
750 lacpdu->partner_port = htons(partner->port_number);
751 lacpdu->partner_state = partner->port_state;
1da177e4
LT		 752
753 /* lacpdu->reserved_3_2 initialized
754 * lacpdu->tlv_type_collector_info initialized
755 * lacpdu->collector_information_length initialized
756 * collector_max_delay initialized
757 * reserved_12[12] initialized
758 * tlv_type_terminator initialized
759 * terminator_length initialized
760 * reserved_50[50] initialized
761 */
1da177e4
LT		 762}
763
764//////////////////////////////////////////////////////////////////////////////////////
765// ================= main 802.3ad protocol code ======================================
766//////////////////////////////////////////////////////////////////////////////////////
767
768/**
769 * ad_lacpdu_send - send out a lacpdu packet on a given port
770 * @port: the port we're looking at
771 *
772 * Returns: 0 on success
773 * < 0 on error
774 */
775static int ad_lacpdu_send(struct port *port)
776{
777 struct slave *slave = port->slave;
778 struct sk_buff *skb;
779 struct lacpdu_header *lacpdu_header;
780 int length = sizeof(struct lacpdu_header);
1da177e4
LT		 781
782 skb = dev_alloc_skb(length);
7bfc4753 783 if (!skb)
1da177e4 784 return -ENOMEM;
1da177e4
LT		 785
786 skb->dev = slave->dev;
459a98ed 787 skb_reset_mac_header(skb);
b0e380b1 788 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 789 skb->protocol = PKT_TYPE_LACPDU;
790 skb->priority = TC_PRIO_CONTROL;
791
792 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
793
e727149e 794 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 795 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 796 because we use it to identify loopback lacpdus in receive. */
e727149e
HE		 797 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
798 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 799
800 lacpdu_header->lacpdu = port->lacpdu; // struct copy
801
802 dev_queue_xmit(skb);
803
804 return 0;
805}
806
807/**
808 * ad_marker_send - send marker information/response on a given port
809 * @port: the port we're looking at
810 * @marker: marker data to send
811 *
812 * Returns: 0 on success
813 * < 0 on error
814 */
1c3f0b8e 815static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 816{
817 struct slave *slave = port->slave;
818 struct sk_buff *skb;
1c3f0b8e
MD		 819 struct bond_marker_header *marker_header;
820 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 821
822 skb = dev_alloc_skb(length + 16);
7bfc4753 823 if (!skb)
1da177e4 824 return -ENOMEM;
1da177e4
LT		 825
826 skb_reserve(skb, 16);
827
828 skb->dev = slave->dev;
459a98ed 829 skb_reset_mac_header(skb);
b0e380b1 830 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 831 skb->protocol = PKT_TYPE_LACPDU;
832
1c3f0b8e 833 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4 834
e727149e 835 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 836 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 837 because we use it to identify loopback MARKERs in receive. */
e727149e
HE		 838 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
839 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 840
841 marker_header->marker = *marker; // struct copy
842
843 dev_queue_xmit(skb);
844
845 return 0;
846}
847
848/**
849 * ad_mux_machine - handle a port's mux state machine
850 * @port: the port we're looking at
851 *
852 */
853static void ad_mux_machine(struct port *port)
854{
855 mux_states_t last_state;
856
857 // keep current State Machine state to compare later if it was changed
858 last_state = port->sm_mux_state;
859
860 if (port->sm_vars & AD_PORT_BEGIN) {
861 port->sm_mux_state = AD_MUX_DETACHED; // next state
862 } else {
863 switch (port->sm_mux_state) {
864 case AD_MUX_DETACHED:
7bfc4753
BD		 865 if ((port->sm_vars & AD_PORT_SELECTED)
866 || (port->sm_vars & AD_PORT_STANDBY))
867 /* if SELECTED or STANDBY */
1da177e4 868 port->sm_mux_state = AD_MUX_WAITING; // next state
1da177e4
LT		 869 break;
870 case AD_MUX_WAITING:
871 // if SELECTED == FALSE return to DETACH state
872 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
873 port->sm_vars &= ~AD_PORT_READY_N;
874 // in order to withhold the Selection Logic to check all ports READY_N value
875 // every callback cycle to update ready variable, we check READY_N and update READY here
876 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
877 port->sm_mux_state = AD_MUX_DETACHED; // next state
878 break;
879 }
880
881 // check if the wait_while_timer expired
7bfc4753
BD		 882 if (port->sm_mux_timer_counter
883 && !(--port->sm_mux_timer_counter))
1da177e4 884 port->sm_vars |= AD_PORT_READY_N;
1da177e4
LT		 885
886 // in order to withhold the selection logic to check all ports READY_N value
887 // every callback cycle to update ready variable, we check READY_N and update READY here
888 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
889
890 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
7bfc4753
BD		 891 if ((port->sm_vars & AD_PORT_READY)
892 && !port->sm_mux_timer_counter)
1da177e4 893 port->sm_mux_state = AD_MUX_ATTACHED; // next state
1da177e4
LT		 894 break;
895 case AD_MUX_ATTACHED:
896 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
1055c9ab 897 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
1da177e4
LT		 898 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
899 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
900 port->sm_vars &= ~AD_PORT_READY_N;
901 // in order to withhold the selection logic to check all ports READY_N value
902 // every callback cycle to update ready variable, we check READY_N and update READY here
903 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
904 port->sm_mux_state = AD_MUX_DETACHED;// next state
905 }
906 break;
907 case AD_MUX_COLLECTING_DISTRIBUTING:
908 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
1055c9ab 909 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
1da177e4
LT		 910 ) {
911 port->sm_mux_state = AD_MUX_ATTACHED;// next state
912
913 } else {
914 // if port state hasn't changed make
915 // sure that a collecting distributing
916 // port in an active aggregator is enabled
917 if (port->aggregator &&
918 port->aggregator->is_active &&
919 !__port_is_enabled(port)) {
920
921 __enable_port(port);
922 }
923 }
924 break;
925 default: //to silence the compiler
926 break;
927 }
928 }
929
930 // check if the state machine was changed
931 if (port->sm_mux_state != last_state) {
a4aee5c8
JP		 932 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
933 port->actor_port_number, last_state,
934 port->sm_mux_state);
1da177e4
LT		 935 switch (port->sm_mux_state) {
936 case AD_MUX_DETACHED:
937 __detach_bond_from_agg(port);
938 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
939 ad_disable_collecting_distributing(port);
940 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
941 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
d238d458 942 port->ntt = true;
1da177e4
LT		 943 break;
944 case AD_MUX_WAITING:
945 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
946 break;
947 case AD_MUX_ATTACHED:
948 __attach_bond_to_agg(port);
949 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
950 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
951 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
952 ad_disable_collecting_distributing(port);
d238d458 953 port->ntt = true;
1da177e4
LT		 954 break;
955 case AD_MUX_COLLECTING_DISTRIBUTING:
956 port->actor_oper_port_state |= AD_STATE_COLLECTING;
957 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
958 ad_enable_collecting_distributing(port);
d238d458 959 port->ntt = true;
1da177e4
LT		 960 break;
961 default: //to silence the compiler
962 break;
963 }
964 }
965}
966
967/**
968 * ad_rx_machine - handle a port's rx State Machine
969 * @lacpdu: the lacpdu we've received
970 * @port: the port we're looking at
971 *
972 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
973 * CURRENT. If timer expired set the state machine in the proper state.
974 * In other cases, this function checks if we need to switch to other state.
975 */
976static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
977{
978 rx_states_t last_state;
979
1da177e4
LT		 980 // keep current State Machine state to compare later if it was changed
981 last_state = port->sm_rx_state;
982
983 // check if state machine should change state
984 // first, check if port was reinitialized
7bfc4753
BD		 985 if (port->sm_vars & AD_PORT_BEGIN)
986 /* next state */
987 port->sm_rx_state = AD_RX_INITIALIZE;
1da177e4 988 // check if port is not enabled
7bfc4753
BD		 989 else if (!(port->sm_vars & AD_PORT_BEGIN)
990 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
991 /* next state */
992 port->sm_rx_state = AD_RX_PORT_DISABLED;
1da177e4
LT		 993 // check if new lacpdu arrived
994 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
995 port->sm_rx_timer_counter = 0; // zero timer
996 port->sm_rx_state = AD_RX_CURRENT;
997 } else {
998 // if timer is on, and if it is expired
999 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1000 switch (port->sm_rx_state) {
1001 case AD_RX_EXPIRED:
1002 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1003 break;
1004 case AD_RX_CURRENT:
1005 port->sm_rx_state = AD_RX_EXPIRED; // next state
1006 break;
1007 default: //to silence the compiler
1008 break;
1009 }
1010 } else {
1011 // if no lacpdu arrived and no timer is on
1012 switch (port->sm_rx_state) {
1013 case AD_RX_PORT_DISABLED:
7bfc4753 1014 if (port->sm_vars & AD_PORT_MOVED)
1da177e4 1015 port->sm_rx_state = AD_RX_INITIALIZE; // next state
7bfc4753
BD		 1016 else if (port->is_enabled
1017 && (port->sm_vars
1018 & AD_PORT_LACP_ENABLED))
1da177e4 1019 port->sm_rx_state = AD_RX_EXPIRED; // next state
7bfc4753
BD		 1020 else if (port->is_enabled
1021 && ((port->sm_vars
1022 & AD_PORT_LACP_ENABLED) == 0))
1da177e4 1023 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1da177e4
LT		 1024 break;
1025 default: //to silence the compiler
1026 break;
1027
1028 }
1029 }
1030 }
1031
1032 // check if the State machine was changed or new lacpdu arrived
1033 if ((port->sm_rx_state != last_state) || (lacpdu)) {
a4aee5c8
JP		 1034 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1035 port->actor_port_number, last_state,
1036 port->sm_rx_state);
1da177e4
LT		 1037 switch (port->sm_rx_state) {
1038 case AD_RX_INITIALIZE:
7bfc4753 1039 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1040 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
7bfc4753 1041 else
1da177e4 1042 port->sm_vars |= AD_PORT_LACP_ENABLED;
1da177e4
LT		 1043 port->sm_vars &= ~AD_PORT_SELECTED;
1044 __record_default(port);
1045 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1046 port->sm_vars &= ~AD_PORT_MOVED;
1047 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1048
1049 /*- Fall Through -*/
1050
1051 case AD_RX_PORT_DISABLED:
1052 port->sm_vars &= ~AD_PORT_MATCHED;
1053 break;
1054 case AD_RX_LACP_DISABLED:
1055 port->sm_vars &= ~AD_PORT_SELECTED;
1056 __record_default(port);
1055c9ab 1057 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1058 port->sm_vars |= AD_PORT_MATCHED;
1059 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1060 break;
1061 case AD_RX_EXPIRED:
1062 //Reset of the Synchronization flag. (Standard 43.4.12)
1063 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1064 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1055c9ab 1065 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1066 port->sm_vars &= ~AD_PORT_MATCHED;
8e321c4f
JL		 1067 port->partner_oper.port_state |=
1068 AD_STATE_LACP_ACTIVITY;
1da177e4
LT		 1069 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1070 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1071 break;
1072 case AD_RX_DEFAULTED:
1073 __update_default_selected(port);
1074 __record_default(port);
1075 port->sm_vars |= AD_PORT_MATCHED;
1076 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1077 break;
1078 case AD_RX_CURRENT:
1079 // detect loopback situation
1080 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1081 // INFO_RECEIVED_LOOPBACK_FRAMES
a4aee5c8
JP		 1082 pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
1083 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
471cb5a3 1084 port->slave->bond->dev->name, port->slave->dev->name);
1da177e4
LT		 1085 return;
1086 }
1087 __update_selected(lacpdu, port);
1088 __update_ntt(lacpdu, port);
1089 __record_pdu(lacpdu, port);
1da177e4
LT		 1090 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1091 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1da177e4
LT		 1092 break;
1093 default: //to silence the compiler
1094 break;
1095 }
1096 }
1da177e4
LT		 1097}
1098
1099/**
1100 * ad_tx_machine - handle a port's tx state machine
1101 * @port: the port we're looking at
1102 *
1103 */
1104static void ad_tx_machine(struct port *port)
1105{
1106 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1107 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1108 // check if there is something to send
1109 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1110 __update_lacpdu_from_port(port);
d238d458 1111
1da177e4 1112 if (ad_lacpdu_send(port) >= 0) {
a4aee5c8
JP		 1113 pr_debug("Sent LACPDU on port %d\n",
1114 port->actor_port_number);
d238d458
HE		 1115
1116 /* mark ntt as false, so it will not be sent again until
1117 demanded */
1118 port->ntt = false;
1da177e4
LT		 1119 }
1120 }
1121 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
128ea6c3
BD		 1122 port->sm_tx_timer_counter =
1123 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 1124 }
1125}
1126
1127/**
1128 * ad_periodic_machine - handle a port's periodic state machine
1129 * @port: the port we're looking at
1130 *
1131 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1132 */
1133static void ad_periodic_machine(struct port *port)
1134{
1135 periodic_states_t last_state;
1136
1137 // keep current state machine state to compare later if it was changed
1138 last_state = port->sm_periodic_state;
1139
1140 // check if port was reinitialized
1141 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1142 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4
LT		 1143 ) {
1144 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1145 }
1146 // check if state machine should change state
1147 else if (port->sm_periodic_timer_counter) {
1148 // check if periodic state machine expired
1149 if (!(--port->sm_periodic_timer_counter)) {
1150 // if expired then do tx
1151 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1152 } else {
1153 // If not expired, check if there is some new timeout parameter from the partner state
1154 switch (port->sm_periodic_state) {
1155 case AD_FAST_PERIODIC:
7bfc4753
BD		 1156 if (!(port->partner_oper.port_state
1157 & AD_STATE_LACP_TIMEOUT))
1da177e4 1158 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1da177e4
LT		 1159 break;
1160 case AD_SLOW_PERIODIC:
1055c9ab 1161 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4
LT		 1162 // stop current timer
1163 port->sm_periodic_timer_counter = 0;
1164 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1165 }
1166 break;
1167 default: //to silence the compiler
1168 break;
1169 }
1170 }
1171 } else {
1172 switch (port->sm_periodic_state) {
1173 case AD_NO_PERIODIC:
1174 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1175 break;
1176 case AD_PERIODIC_TX:
7bfc4753
BD		 1177 if (!(port->partner_oper.port_state
1178 & AD_STATE_LACP_TIMEOUT))
1da177e4 1179 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
7bfc4753 1180 else
1da177e4 1181 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1da177e4
LT		 1182 break;
1183 default: //to silence the compiler
1184 break;
1185 }
1186 }
1187
1188 // check if the state machine was changed
1189 if (port->sm_periodic_state != last_state) {
a4aee5c8
JP		 1190 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1191 port->actor_port_number, last_state,
1192 port->sm_periodic_state);
1da177e4
LT		 1193 switch (port->sm_periodic_state) {
1194 case AD_NO_PERIODIC:
1195 port->sm_periodic_timer_counter = 0; // zero timer
1196 break;
1197 case AD_FAST_PERIODIC:
1198 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
1199 break;
1200 case AD_SLOW_PERIODIC:
1201 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
1202 break;
1203 case AD_PERIODIC_TX:
d238d458 1204 port->ntt = true;
1da177e4
LT		 1205 break;
1206 default: //to silence the compiler
1207 break;
1208 }
1209 }
1210}
1211
1212/**
1213 * ad_port_selection_logic - select aggregation groups
1214 * @port: the port we're looking at
1215 *
1216 * Select aggregation groups, and assign each port for it's aggregetor. The
1217 * selection logic is called in the inititalization (after all the handshkes),
1218 * and after every lacpdu receive (if selected is off).
1219 */
1220static void ad_port_selection_logic(struct port *port)
1221{
1222 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1223 struct port *last_port = NULL, *curr_port;
3e36bb75
VF		 1224 struct list_head *iter;
1225 struct bonding *bond;
1226 struct slave *slave;
1da177e4
LT		 1227 int found = 0;
1228
1229 // if the port is already Selected, do nothing
7bfc4753 1230 if (port->sm_vars & AD_PORT_SELECTED)
1da177e4 1231 return;
1da177e4 1232
3e36bb75
VF		 1233 bond = __get_bond_by_port(port);
1234
1da177e4
LT		 1235 // if the port is connected to other aggregator, detach it
1236 if (port->aggregator) {
1237 // detach the port from its former aggregator
128ea6c3
BD		 1238 temp_aggregator = port->aggregator;
1239 for (curr_port = temp_aggregator->lag_ports; curr_port;
1240 last_port = curr_port,
1241 curr_port = curr_port->next_port_in_aggregator) {
1da177e4
LT		 1242 if (curr_port == port) {
1243 temp_aggregator->num_of_ports--;
1244 if (!last_port) {// if it is the first port attached to the aggregator
128ea6c3
BD		 1245 temp_aggregator->lag_ports =
1246 port->next_port_in_aggregator;
1da177e4 1247 } else {// not the first port attached to the aggregator
128ea6c3
BD		 1248 last_port->next_port_in_aggregator =
1249 port->next_port_in_aggregator;
1da177e4
LT		 1250 }
1251
1252 // clear the port's relations to this aggregator
1253 port->aggregator = NULL;
128ea6c3
BD		 1254 port->next_port_in_aggregator = NULL;
1255 port->actor_port_aggregator_identifier = 0;
1da177e4 1256
a4aee5c8
JP		 1257 pr_debug("Port %d left LAG %d\n",
1258 port->actor_port_number,
1259 temp_aggregator->aggregator_identifier);
1da177e4 1260 // if the aggregator is empty, clear its parameters, and set it ready to be attached
7bfc4753 1261 if (!temp_aggregator->lag_ports)
1da177e4 1262 ad_clear_agg(temp_aggregator);
1da177e4
LT		 1263 break;
1264 }
1265 }
1266 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
a4aee5c8 1267 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
471cb5a3 1268 port->slave->bond->dev->name,
e5e2a8fd
JP		 1269 port->actor_port_number,
1270 port->slave->dev->name,
1271 port->aggregator->aggregator_identifier);
1da177e4
LT		 1272 }
1273 }
1274 // search on all aggregators for a suitable aggregator for this port
3e36bb75
VF		 1275 bond_for_each_slave(bond, slave, iter) {
1276 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1da177e4
LT		 1277
1278 // keep a free aggregator for later use(if needed)
1279 if (!aggregator->lag_ports) {
7bfc4753 1280 if (!free_aggregator)
128ea6c3 1281 free_aggregator = aggregator;
1da177e4
LT		 1282 continue;
1283 }
1284 // check if current aggregator suits us
1285 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1055c9ab
HE		 1286 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1287 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1288 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1289 ) &&
1055c9ab 1290 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1da177e4
LT		 1291 !aggregator->is_individual) // but is not individual OR
1292 )
1293 ) {
1294 // attach to the founded aggregator
1295 port->aggregator = aggregator;
128ea6c3
BD		 1296 port->actor_port_aggregator_identifier =
1297 port->aggregator->aggregator_identifier;
1298 port->next_port_in_aggregator = aggregator->lag_ports;
1da177e4 1299 port->aggregator->num_of_ports++;
128ea6c3 1300 aggregator->lag_ports = port;
a4aee5c8
JP		 1301 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1302 port->actor_port_number,
1303 port->aggregator->aggregator_identifier);
1da177e4
LT		 1304
1305 // mark this port as selected
1306 port->sm_vars |= AD_PORT_SELECTED;
1307 found = 1;
1308 break;
1309 }
1310 }
1311
1312 // the port couldn't find an aggregator - attach it to a new aggregator
1313 if (!found) {
1314 if (free_aggregator) {
1315 // assign port a new aggregator
1316 port->aggregator = free_aggregator;
128ea6c3
BD		 1317 port->actor_port_aggregator_identifier =
1318 port->aggregator->aggregator_identifier;
1da177e4
LT		 1319
1320 // update the new aggregator's parameters
1321 // if port was responsed from the end-user
7bfc4753
BD		 1322 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1323 /* if port is full duplex */
1624db7b 1324 port->aggregator->is_individual = false;
7bfc4753 1325 else
1624db7b 1326 port->aggregator->is_individual = true;
1da177e4
LT		 1327
1328 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1329 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
128ea6c3
BD		 1330 port->aggregator->partner_system =
1331 port->partner_oper.system;
1332 port->aggregator->partner_system_priority =
1333 port->partner_oper.system_priority;
1055c9ab 1334 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1335 port->aggregator->receive_state = 1;
1336 port->aggregator->transmit_state = 1;
1337 port->aggregator->lag_ports = port;
1338 port->aggregator->num_of_ports++;
1339
1340 // mark this port as selected
1341 port->sm_vars |= AD_PORT_SELECTED;
1342
a4aee5c8
JP		 1343 pr_debug("Port %d joined LAG %d(new LAG)\n",
1344 port->actor_port_number,
1345 port->aggregator->aggregator_identifier);
1da177e4 1346 } else {
a4aee5c8 1347 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
471cb5a3 1348 port->slave->bond->dev->name,
1da177e4
LT		 1349 port->actor_port_number, port->slave->dev->name);
1350 }
1351 }
1352 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1353 // else set ready=FALSE in all aggregator's ports
1354 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1355
fd989c83
JV		 1356 aggregator = __get_first_agg(port);
1357 ad_agg_selection_logic(aggregator);
1358}
1359
1360/*
1361 * Decide if "agg" is a better choice for the new active aggregator that
1362 * the current best, according to the ad_select policy.
1363 */
1364static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1365 struct aggregator *curr)
1366{
1367 /*
1368 * 0. If no best, select current.
1369 *
1370 * 1. If the current agg is not individual, and the best is
1371 * individual, select current.
1372 *
1373 * 2. If current agg is individual and the best is not, keep best.
1374 *
1375 * 3. Therefore, current and best are both individual or both not
1376 * individual, so:
1377 *
1378 * 3a. If current agg partner replied, and best agg partner did not,
1379 * select current.
1380 *
1381 * 3b. If current agg partner did not reply and best agg partner
1382 * did reply, keep best.
1383 *
1384 * 4. Therefore, current and best both have partner replies or
1385 * both do not, so perform selection policy:
1386 *
1387 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1388 * select by bandwidth.
1389 *
1390 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1391 */
1392 if (!best)
1393 return curr;
1394
1395 if (!curr->is_individual && best->is_individual)
1396 return curr;
1397
1398 if (curr->is_individual && !best->is_individual)
1399 return best;
1400
1401 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1402 return curr;
1403
1404 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1405 return best;
1406
1407 switch (__get_agg_selection_mode(curr->lag_ports)) {
1408 case BOND_AD_COUNT:
1409 if (curr->num_of_ports > best->num_of_ports)
1410 return curr;
1411
1412 if (curr->num_of_ports < best->num_of_ports)
1413 return best;
1414
1415 /*FALLTHROUGH*/
1416 case BOND_AD_STABLE:
1417 case BOND_AD_BANDWIDTH:
1418 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1419 return curr;
1420
1421 break;
1422
1423 default:
a4aee5c8 1424 pr_warning("%s: Impossible agg select mode %d\n",
471cb5a3 1425 curr->slave->bond->dev->name,
e5e2a8fd 1426 __get_agg_selection_mode(curr->lag_ports));
fd989c83 1427 break;
1da177e4 1428 }
fd989c83
JV		 1429
1430 return best;
1da177e4
LT		 1431}
1432
4cd6fe1c
SH		 1433static int agg_device_up(const struct aggregator *agg)
1434{
2430af8b
JB		 1435 struct port *port = agg->lag_ports;
1436 if (!port)
1437 return 0;
1438 return (netif_running(port->slave->dev) &&
1439 netif_carrier_ok(port->slave->dev));
4cd6fe1c
SH		 1440}
1441
1da177e4
LT		 1442/**
1443 * ad_agg_selection_logic - select an aggregation group for a team
1444 * @aggregator: the aggregator we're looking at
1445 *
1446 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1447 *
1448 * The logic of this function is to select the aggregator according to
1449 * the ad_select policy:
1450 *
1451 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1452 * it, and to reselect the active aggregator only if the previous
1453 * aggregator has no more ports related to it.
1454 *
1455 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1456 * bandwidth, and reselect whenever a link state change takes place or the
1457 * set of slaves in the bond changes.
1458 *
1459 * BOND_AD_COUNT: select the aggregator with largest number of ports
1460 * (slaves), and reselect whenever a link state change takes place or the
1461 * set of slaves in the bond changes.
1da177e4
LT		 1462 *
1463 * FIXME: this function MUST be called with the first agg in the bond, or
1464 * __get_active_agg() won't work correctly. This function should be better
1465 * called with the bond itself, and retrieve the first agg from it.
1466 */
fd989c83 1467static void ad_agg_selection_logic(struct aggregator *agg)
1da177e4 1468{
fd989c83 1469 struct aggregator *best, *active, *origin;
bef1fcce
VF		 1470 struct bonding *bond = agg->slave->bond;
1471 struct list_head *iter;
1472 struct slave *slave;
1da177e4 1473 struct port *port;
1da177e4 1474
fd989c83 1475 origin = agg;
fd989c83 1476 active = __get_active_agg(agg);
4cd6fe1c 1477 best = (active && agg_device_up(active)) ? active : NULL;
1da177e4 1478
be79bd04 1479 rcu_read_lock();
1480 bond_for_each_slave_rcu(bond, slave, iter) {
bef1fcce
VF		 1481 agg = &(SLAVE_AD_INFO(slave).aggregator);
1482
fd989c83
JV		 1483 agg->is_active = 0;
1484
4cd6fe1c 1485 if (agg->num_of_ports && agg_device_up(agg))
fd989c83 1486 best = ad_agg_selection_test(best, agg);
bef1fcce 1487 }
fd989c83
JV		 1488
1489 if (best &&
1490 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1491 /*
1492 * For the STABLE policy, don't replace the old active
1493 * aggregator if it's still active (it has an answering
1494 * partner) or if both the best and active don't have an
1495 * answering partner.
1496 */
1497 if (active && active->lag_ports &&
1498 active->lag_ports->is_enabled &&
1499 (__agg_has_partner(active) ||
1500 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1501 if (!(!active->actor_oper_aggregator_key &&
1502 best->actor_oper_aggregator_key)) {
1503 best = NULL;
1504 active->is_active = 1;
1da177e4
LT		 1505 }
1506 }
fd989c83 1507 }
1da177e4 1508
fd989c83
JV		 1509 if (best && (best == active)) {
1510 best = NULL;
1511 active->is_active = 1;
1da177e4
LT		 1512 }
1513
be79bd04 1514 /* if there is new best aggregator, activate it */
fd989c83 1515 if (best) {
5a03cdb7 1516 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1517 best->aggregator_identifier, best->num_of_ports,
1518 best->actor_oper_aggregator_key,
1519 best->partner_oper_aggregator_key,
1520 best->is_individual, best->is_active);
5a03cdb7 1521 pr_debug("best ports %p slave %p %s\n",
a4aee5c8
JP		 1522 best->lag_ports, best->slave,
1523 best->slave ? best->slave->dev->name : "NULL");
fd989c83 1524
be79bd04 1525 bond_for_each_slave_rcu(bond, slave, iter) {
bef1fcce 1526 agg = &(SLAVE_AD_INFO(slave).aggregator);
fd989c83 1527
5a03cdb7 1528 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1529 agg->aggregator_identifier, agg->num_of_ports,
1530 agg->actor_oper_aggregator_key,
1531 agg->partner_oper_aggregator_key,
1532 agg->is_individual, agg->is_active);
1da177e4
LT		 1533 }
1534
be79bd04 1535 /* check if any partner replys */
fd989c83 1536 if (best->is_individual) {
a4aee5c8 1537 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
be79bd04 1538 best->slave ?
1539 best->slave->bond->dev->name : "NULL");
1da177e4
LT		 1540 }
1541
fd989c83 1542 best->is_active = 1;
5a03cdb7 1543 pr_debug("LAG %d chosen as the active LAG\n",
a4aee5c8 1544 best->aggregator_identifier);
5a03cdb7 1545 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1546 best->aggregator_identifier, best->num_of_ports,
1547 best->actor_oper_aggregator_key,
1548 best->partner_oper_aggregator_key,
1549 best->is_individual, best->is_active);
1da177e4 1550
be79bd04 1551 /* disable the ports that were related to the former active_aggregator */
fd989c83
JV		 1552 if (active) {
1553 for (port = active->lag_ports; port;
1554 port = port->next_port_in_aggregator) {
1da177e4
LT		 1555 __disable_port(port);
1556 }
1557 }
1558 }
1559
fd989c83
JV		 1560 /*
1561 * if the selected aggregator is of join individuals
1562 * (partner_system is NULL), enable their ports
1563 */
1564 active = __get_active_agg(origin);
1da177e4 1565
fd989c83
JV		 1566 if (active) {
1567 if (!__agg_has_partner(active)) {
1568 for (port = active->lag_ports; port;
1569 port = port->next_port_in_aggregator) {
1da177e4
LT		 1570 __enable_port(port);
1571 }
1572 }
1573 }
fd989c83 1574
be79bd04 1575 rcu_read_unlock();
1576
bef1fcce 1577 bond_3ad_set_carrier(bond);
1da177e4
LT		 1578}
1579
1580/**
1581 * ad_clear_agg - clear a given aggregator's parameters
1582 * @aggregator: the aggregator we're looking at
1583 *
1584 */
1585static void ad_clear_agg(struct aggregator *aggregator)
1586{
1587 if (aggregator) {
1624db7b 1588 aggregator->is_individual = false;
1da177e4
LT		 1589 aggregator->actor_admin_aggregator_key = 0;
1590 aggregator->actor_oper_aggregator_key = 0;
1591 aggregator->partner_system = null_mac_addr;
1592 aggregator->partner_system_priority = 0;
1593 aggregator->partner_oper_aggregator_key = 0;
1594 aggregator->receive_state = 0;
1595 aggregator->transmit_state = 0;
1596 aggregator->lag_ports = NULL;
1597 aggregator->is_active = 0;
1598 aggregator->num_of_ports = 0;
a4aee5c8
JP		 1599 pr_debug("LAG %d was cleared\n",
1600 aggregator->aggregator_identifier);
1da177e4
LT		 1601 }
1602}
1603
1604/**
1605 * ad_initialize_agg - initialize a given aggregator's parameters
1606 * @aggregator: the aggregator we're looking at
1607 *
1608 */
1609static void ad_initialize_agg(struct aggregator *aggregator)
1610{
1611 if (aggregator) {
1612 ad_clear_agg(aggregator);
1613
1614 aggregator->aggregator_mac_address = null_mac_addr;
1615 aggregator->aggregator_identifier = 0;
1616 aggregator->slave = NULL;
1617 }
1618}
1619
1620/**
1621 * ad_initialize_port - initialize a given port's parameters
1622 * @aggregator: the aggregator we're looking at
1623 * @lacp_fast: boolean. whether fast periodic should be used
1624 *
1625 */
1626static void ad_initialize_port(struct port *port, int lacp_fast)
1627{
c7e703d0
HE		 1628 static const struct port_params tmpl = {
1629 .system_priority = 0xffff,
1630 .key = 1,
1631 .port_number = 1,
1632 .port_priority = 0xff,
1633 .port_state = 1,
1634 };
7addeef6
HE		 1635 static const struct lacpdu lacpdu = {
1636 .subtype = 0x01,
1637 .version_number = 0x01,
1638 .tlv_type_actor_info = 0x01,
1639 .actor_information_length = 0x14,
1640 .tlv_type_partner_info = 0x02,
1641 .partner_information_length = 0x14,
1642 .tlv_type_collector_info = 0x03,
1643 .collector_information_length = 0x10,
1644 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1645 };
c7e703d0 1646
1da177e4
LT		 1647 if (port) {
1648 port->actor_port_number = 1;
1649 port->actor_port_priority = 0xff;
1650 port->actor_system = null_mac_addr;
1651 port->actor_system_priority = 0xffff;
1652 port->actor_port_aggregator_identifier = 0;
d238d458 1653 port->ntt = false;
1da177e4
LT		 1654 port->actor_admin_port_key = 1;
1655 port->actor_oper_port_key = 1;
1656 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1657 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1658
7bfc4753 1659 if (lacp_fast)
1da177e4 1660 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1da177e4 1661
c7e703d0
HE		 1662 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1663 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1664
f48127b6 1665 port->is_enabled = true;
1da177e4
LT		 1666 // ****** private parameters ******
1667 port->sm_vars = 0x3;
1668 port->sm_rx_state = 0;
1669 port->sm_rx_timer_counter = 0;
1670 port->sm_periodic_state = 0;
1671 port->sm_periodic_timer_counter = 0;
1672 port->sm_mux_state = 0;
1673 port->sm_mux_timer_counter = 0;
1674 port->sm_tx_state = 0;
1675 port->sm_tx_timer_counter = 0;
1676 port->slave = NULL;
1677 port->aggregator = NULL;
1678 port->next_port_in_aggregator = NULL;
1679 port->transaction_id = 0;
1680
7addeef6 1681 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1da177e4
LT		 1682 }
1683}
1684
1685/**
1686 * ad_enable_collecting_distributing - enable a port's transmit/receive
1687 * @port: the port we're looking at
1688 *
1689 * Enable @port if it's in an active aggregator
1690 */
1691static void ad_enable_collecting_distributing(struct port *port)
1692{
1693 if (port->aggregator->is_active) {
a4aee5c8
JP		 1694 pr_debug("Enabling port %d(LAG %d)\n",
1695 port->actor_port_number,
1696 port->aggregator->aggregator_identifier);
1da177e4
LT		 1697 __enable_port(port);
1698 }
1699}
1700
1701/**
1702 * ad_disable_collecting_distributing - disable a port's transmit/receive
1703 * @port: the port we're looking at
1704 *
1705 */
1706static void ad_disable_collecting_distributing(struct port *port)
1707{
1708 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
a4aee5c8
JP		 1709 pr_debug("Disabling port %d(LAG %d)\n",
1710 port->actor_port_number,
1711 port->aggregator->aggregator_identifier);
1da177e4
LT		 1712 __disable_port(port);
1713 }
1714}
1715
1716#if 0
1717/**
1718 * ad_marker_info_send - send a marker information frame
1719 * @port: the port we're looking at
1720 *
1721 * This function does nothing since we decided not to implement send and handle
1722 * response for marker PDU's, in this stage, but only to respond to marker
1723 * information.
1724 */
1725static void ad_marker_info_send(struct port *port)
1726{
1c3f0b8e 1727 struct bond_marker marker;
1da177e4
LT		 1728 u16 index;
1729
1730 // fill the marker PDU with the appropriate values
1731 marker.subtype = 0x02;
1732 marker.version_number = 0x01;
1733 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1734 marker.marker_length = 0x16;
1735 // convert requester_port to Big Endian
1736 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1737 marker.requester_system = port->actor_system;
1738 // convert requester_port(u32) to Big Endian
128ea6c3
BD		 1739 marker.requester_transaction_id =
1740 (((++port->transaction_id & 0xFF) << 24)
1741 | ((port->transaction_id & 0xFF00) << 8)
1742 | ((port->transaction_id & 0xFF0000) >> 8)
1743 | ((port->transaction_id & 0xFF000000) >> 24));
1da177e4
LT		 1744 marker.pad = 0;
1745 marker.tlv_type_terminator = 0x00;
1746 marker.terminator_length = 0x00;
128ea6c3
BD		 1747 for (index = 0; index < 90; index++)
1748 marker.reserved_90[index] = 0;
1da177e4
LT		 1749
1750 // send the marker information
1751 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1752 pr_debug("Sent Marker Information on port %d\n",
1753 port->actor_port_number);
1da177e4
LT		 1754 }
1755}
1756#endif
1757
1758/**
1759 * ad_marker_info_received - handle receive of a Marker information frame
1760 * @marker_info: Marker info received
1761 * @port: the port we're looking at
1762 *
1763 */
1c3f0b8e
MD		 1764static void ad_marker_info_received(struct bond_marker *marker_info,
1765 struct port *port)
1da177e4 1766{
1c3f0b8e 1767 struct bond_marker marker;
1da177e4
LT		 1768
1769 // copy the received marker data to the response marker
1770 //marker = *marker_info;
1c3f0b8e 1771 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1da177e4 1772 // change the marker subtype to marker response
128ea6c3 1773 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1da177e4
LT		 1774 // send the marker response
1775
1776 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1777 pr_debug("Sent Marker Response on port %d\n",
1778 port->actor_port_number);
1da177e4
LT		 1779 }
1780}
1781
1782/**
1783 * ad_marker_response_received - handle receive of a marker response frame
1784 * @marker: marker PDU received
1785 * @port: the port we're looking at
1786 *
1787 * This function does nothing since we decided not to implement send and handle
1788 * response for marker PDU's, in this stage, but only to respond to marker
1789 * information.
1790 */
1c3f0b8e
MD		 1791static void ad_marker_response_received(struct bond_marker *marker,
1792 struct port *port)
1da177e4 1793{
128ea6c3
BD		 1794 marker = NULL; /* just to satisfy the compiler */
1795 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 1796 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1797}
1798
1da177e4
LT		 1799//////////////////////////////////////////////////////////////////////////////////////
1800// ================= AD exported functions to the main bonding code ==================
1801//////////////////////////////////////////////////////////////////////////////////////
1802
1803// Check aggregators status in team every T seconds
1804#define AD_AGGREGATOR_SELECTION_TIMER 8
1805
fd989c83
JV		 1806/*
1807 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1808 *
1809 * Set the aggregation selection timer, to initiate an agg selection in
1810 * the very near future. Called during first initialization, and during
1811 * any down to up transitions of the bond.
1812 */
1813void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1814{
1815 BOND_AD_INFO(bond).agg_select_timer = timeout;
fd989c83
JV		 1816}
1817
1da177e4
LT		 1818static u16 aggregator_identifier;
1819
1820/**
1821 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1822 * @bond: bonding struct to work on
1823 * @tick_resolution: tick duration (millisecond resolution)
1da177e4
LT		 1824 *
1825 * Can be called only after the mac address of the bond is set.
1826 */
56d00c67 1827void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
3a6d54c5 1828{
1da177e4 1829 // check that the bond is not initialized yet
3a6d54c5
JP		 1830 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1831 bond->dev->dev_addr)) {
1da177e4
LT		 1832
1833 aggregator_identifier = 0;
1834
1da177e4
LT		 1835 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1836 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1837
1838 // initialize how many times this module is called in one second(should be about every 100ms)
1839 ad_ticks_per_sec = tick_resolution;
1840
fd989c83
JV		 1841 bond_3ad_initiate_agg_selection(bond,
1842 AD_AGGREGATOR_SELECTION_TIMER *
1843 ad_ticks_per_sec);
1da177e4
LT		 1844 }
1845}
1846
1847/**
1848 * bond_3ad_bind_slave - initialize a slave's port
1849 * @slave: slave struct to work on
1850 *
1851 * Returns: 0 on success
1852 * < 0 on error
1853 */
1854int bond_3ad_bind_slave(struct slave *slave)
1855{
1856 struct bonding *bond = bond_get_bond_by_slave(slave);
1857 struct port *port;
1858 struct aggregator *aggregator;
1859
1860 if (bond == NULL) {
a4aee5c8 1861 pr_err("%s: The slave %s is not attached to its bond\n",
471cb5a3 1862 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 1863 return -1;
1864 }
1865
b595076a 1866 //check that the slave has not been initialized yet.
1da177e4
LT		 1867 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1868
1869 // port initialization
1870 port = &(SLAVE_AD_INFO(slave).port);
1871
bf0239a9 1872 ad_initialize_port(port, bond->params.lacp_fast);
1da177e4 1873
e0809dbc 1874 __initialize_port_locks(slave);
1da177e4
LT		 1875 port->slave = slave;
1876 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1877 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1878 // ------------------------------------------------------------
1879 // Port key : | User key | Speed |Duplex|
1880 // ------------------------------------------------------------
1881 // 16 6 1 0
1882 port->actor_admin_port_key = 0; // initialize this parameter
1883 port->actor_admin_port_key |= __get_duplex(port);
1884 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1885 port->actor_oper_port_key = port->actor_admin_port_key;
1886 // if the port is not full duplex, then the port should be not lacp Enabled
7bfc4753 1887 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1888 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1da177e4
LT		 1889 // actor system is the bond's system
1890 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1891 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1892 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1893 port->aggregator = NULL;
1894 port->next_port_in_aggregator = NULL;
1895
1896 __disable_port(port);
1da177e4
LT		 1897
1898 // aggregator initialization
1899 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1900
1901 ad_initialize_agg(aggregator);
1902
1903 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1904 aggregator->aggregator_identifier = (++aggregator_identifier);
1905 aggregator->slave = slave;
1906 aggregator->is_active = 0;
1907 aggregator->num_of_ports = 0;
1908 }
1909
1910 return 0;
1911}
1912
1913/**
1914 * bond_3ad_unbind_slave - deinitialize a slave's port
1915 * @slave: slave struct to work on
1916 *
1917 * Search for the aggregator that is related to this port, remove the
1918 * aggregator and assign another aggregator for other port related to it
1919 * (if any), and remove the port.
1920 */
1921void bond_3ad_unbind_slave(struct slave *slave)
1922{
1923 struct port *port, *prev_port, *temp_port;
1924 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1925 int select_new_active_agg = 0;
0b088264
VF		 1926 struct bonding *bond = slave->bond;
1927 struct slave *slave_iter;
1928 struct list_head *iter;
a361c83c 1929
1da177e4
LT		 1930 // find the aggregator related to this slave
1931 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1932
1933 // find the port related to this slave
1934 port = &(SLAVE_AD_INFO(slave).port);
1935
1936 // if slave is null, the whole port is not initialized
1937 if (!port->slave) {
a4aee5c8 1938 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
471cb5a3 1939 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 1940 return;
1941 }
1942
a4aee5c8
JP		 1943 pr_debug("Unbinding Link Aggregation Group %d\n",
1944 aggregator->aggregator_identifier);
1da177e4
LT		 1945
1946 /* Tell the partner that this port is not suitable for aggregation */
1947 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1948 __update_lacpdu_from_port(port);
1949 ad_lacpdu_send(port);
1950
1951 // check if this aggregator is occupied
1952 if (aggregator->lag_ports) {
1953 // check if there are other ports related to this aggregator except
1954 // the port related to this slave(thats ensure us that there is a
1955 // reason to search for new aggregator, and that we will find one
1956 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
1957 // find new aggregator for the related port(s)
0b088264
VF		 1958 bond_for_each_slave(bond, slave_iter, iter) {
1959 new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
fd589a8f 1960 // if the new aggregator is empty, or it is connected to our port only
7bfc4753
BD		 1961 if (!new_aggregator->lag_ports
1962 || ((new_aggregator->lag_ports == port)
1963 && !new_aggregator->lag_ports->next_port_in_aggregator))
1da177e4 1964 break;
1da177e4 1965 }
0b088264
VF		 1966 if (!slave_iter)
1967 new_aggregator = NULL;
1da177e4
LT		 1968 // if new aggregator found, copy the aggregator's parameters
1969 // and connect the related lag_ports to the new aggregator
1970 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
a4aee5c8
JP		 1971 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
1972 aggregator->aggregator_identifier,
1973 new_aggregator->aggregator_identifier);
1da177e4
LT		 1974
1975 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
a4aee5c8 1976 pr_info("%s: Removing an active aggregator\n",
471cb5a3 1977 aggregator->slave->bond->dev->name);
1da177e4
LT		 1978 // select new active aggregator
1979 select_new_active_agg = 1;
1980 }
1981
1982 new_aggregator->is_individual = aggregator->is_individual;
1983 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
1984 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
1985 new_aggregator->partner_system = aggregator->partner_system;
1986 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
1987 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
1988 new_aggregator->receive_state = aggregator->receive_state;
1989 new_aggregator->transmit_state = aggregator->transmit_state;
1990 new_aggregator->lag_ports = aggregator->lag_ports;
1991 new_aggregator->is_active = aggregator->is_active;
1992 new_aggregator->num_of_ports = aggregator->num_of_ports;
1993
1994 // update the information that is written on the ports about the aggregator
128ea6c3
BD		 1995 for (temp_port = aggregator->lag_ports; temp_port;
1996 temp_port = temp_port->next_port_in_aggregator) {
1997 temp_port->aggregator = new_aggregator;
1da177e4
LT		 1998 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
1999 }
2000
2001 // clear the aggregator
2002 ad_clear_agg(aggregator);
a361c83c 2003
7bfc4753 2004 if (select_new_active_agg)
1da177e4 2005 ad_agg_selection_logic(__get_first_agg(port));
1da177e4 2006 } else {
a4aee5c8 2007 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
471cb5a3 2008 slave->bond->dev->name);
1da177e4
LT		 2009 }
2010 } else { // in case that the only port related to this aggregator is the one we want to remove
2011 select_new_active_agg = aggregator->is_active;
2012 // clear the aggregator
2013 ad_clear_agg(aggregator);
2014 if (select_new_active_agg) {
a4aee5c8 2015 pr_info("%s: Removing an active aggregator\n",
471cb5a3 2016 slave->bond->dev->name);
1da177e4 2017 // select new active aggregator
74684493
VF		 2018 temp_aggregator = __get_first_agg(port);
2019 if (temp_aggregator)
2020 ad_agg_selection_logic(temp_aggregator);
1da177e4
LT		 2021 }
2022 }
2023 }
2024
5a03cdb7 2025 pr_debug("Unbinding port %d\n", port->actor_port_number);
1da177e4 2026 // find the aggregator that this port is connected to
0b088264
VF		 2027 bond_for_each_slave(bond, slave_iter, iter) {
2028 temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
1da177e4
LT		 2029 prev_port = NULL;
2030 // search the port in the aggregator's related ports
128ea6c3
BD		 2031 for (temp_port = temp_aggregator->lag_ports; temp_port;
2032 prev_port = temp_port,
2033 temp_port = temp_port->next_port_in_aggregator) {
1da177e4 2034 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
7bfc4753 2035 if (prev_port)
1da177e4 2036 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
7bfc4753 2037 else
1da177e4 2038 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
1da177e4 2039 temp_aggregator->num_of_ports--;
128ea6c3 2040 if (temp_aggregator->num_of_ports == 0) {
1da177e4
LT		 2041 select_new_active_agg = temp_aggregator->is_active;
2042 // clear the aggregator
2043 ad_clear_agg(temp_aggregator);
2044 if (select_new_active_agg) {
a4aee5c8 2045 pr_info("%s: Removing an active aggregator\n",
471cb5a3 2046 slave->bond->dev->name);
1da177e4
LT		 2047 // select new active aggregator
2048 ad_agg_selection_logic(__get_first_agg(port));
2049 }
2050 }
2051 break;
2052 }
2053 }
2054 }
128ea6c3 2055 port->slave = NULL;
1da177e4
LT		 2056}
2057
2058/**
2059 * bond_3ad_state_machine_handler - handle state machines timeout
2060 * @bond: bonding struct to work on
2061 *
2062 * The state machine handling concept in this module is to check every tick
2063 * which state machine should operate any function. The execution order is
2064 * round robin, so when we have an interaction between state machines, the
2065 * reply of one to each other might be delayed until next tick.
2066 *
2067 * This function also complete the initialization when the agg_select_timer
2068 * times out, and it selects an aggregator for the ports that are yet not
2069 * related to any aggregator, and selects the active aggregator for a bond.
2070 */
1b76b316 2071void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2072{
1b76b316
JV		 2073 struct bonding *bond = container_of(work, struct bonding,
2074 ad_work.work);
1da177e4 2075 struct aggregator *aggregator;
3c4c88a1
VF		 2076 struct list_head *iter;
2077 struct slave *slave;
2078 struct port *port;
1da177e4 2079
1f2cd845 2080 read_lock(&bond->lock);
be79bd04 2081 rcu_read_lock();
1f2cd845 2082
be79bd04 2083 /* check if there are any slaves */
0965a1f3 2084 if (!bond_has_slaves(bond))
1da177e4 2085 goto re_arm;
1da177e4 2086
be79bd04 2087 /* check if agg_select_timer timer after initialize is timed out */
1da177e4 2088 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
be79bd04 2089 slave = bond_first_slave_rcu(bond);
fe9323da
VF		 2090 port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL;
2091
be79bd04 2092 /* select the active aggregator for the bond */
fe9323da 2093 if (port) {
1da177e4 2094 if (!port->slave) {
a4aee5c8
JP		 2095 pr_warning("%s: Warning: bond's first port is uninitialized\n",
2096 bond->dev->name);
1da177e4
LT		 2097 goto re_arm;
2098 }
2099
2100 aggregator = __get_first_agg(port);
2101 ad_agg_selection_logic(aggregator);
2102 }
f0c76d61 2103 bond_3ad_set_carrier(bond);
1da177e4
LT		 2104 }
2105
be79bd04 2106 /* for each port run the state machines */
2107 bond_for_each_slave_rcu(bond, slave, iter) {
3c4c88a1 2108 port = &(SLAVE_AD_INFO(slave).port);
1da177e4 2109 if (!port->slave) {
a4aee5c8
JP		 2110 pr_warning("%s: Warning: Found an uninitialized port\n",
2111 bond->dev->name);
1da177e4
LT		 2112 goto re_arm;
2113 }
2114
16d79d7d
NC		 2115 /* Lock around state machines to protect data accessed
2116 * by all (e.g., port->sm_vars). ad_rx_machine may run
2117 * concurrently due to incoming LACPDU.
2118 */
9ac3524a 2119 __get_state_machine_lock(port);
16d79d7d 2120
1da177e4
LT		 2121 ad_rx_machine(NULL, port);
2122 ad_periodic_machine(port);
2123 ad_port_selection_logic(port);
2124 ad_mux_machine(port);
2125 ad_tx_machine(port);
2126
be79bd04 2127 /* turn off the BEGIN bit, since we already handled it */
7bfc4753 2128 if (port->sm_vars & AD_PORT_BEGIN)
1da177e4 2129 port->sm_vars &= ~AD_PORT_BEGIN;
16d79d7d 2130
9ac3524a 2131 __release_state_machine_lock(port);
1da177e4
LT		 2132 }
2133
2134re_arm:
be79bd04 2135 rcu_read_unlock();
1f2cd845 2136 read_unlock(&bond->lock);
be79bd04 2137 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1da177e4
LT		 2138}
2139
2140/**
2141 * bond_3ad_rx_indication - handle a received frame
2142 * @lacpdu: received lacpdu
2143 * @slave: slave struct to work on
2144 * @length: length of the data received
2145 *
2146 * It is assumed that frames that were sent on this NIC don't returned as new
2147 * received frames (loopback). Since only the payload is given to this
2148 * function, it check for loopback.
2149 */
13a8e0c8 2150static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
1da177e4
LT		 2151{
2152 struct port *port;
13a8e0c8 2153 int ret = RX_HANDLER_ANOTHER;
1da177e4
LT		 2154
2155 if (length >= sizeof(struct lacpdu)) {
2156
2157 port = &(SLAVE_AD_INFO(slave).port);
2158
2159 if (!port->slave) {
a4aee5c8 2160 pr_warning("%s: Warning: port of slave %s is uninitialized\n",
471cb5a3 2161 slave->dev->name, slave->bond->dev->name);
13a8e0c8 2162 return ret;
1da177e4
LT		 2163 }
2164
2165 switch (lacpdu->subtype) {
2166 case AD_TYPE_LACPDU:
13a8e0c8 2167 ret = RX_HANDLER_CONSUMED;
a4aee5c8
JP		 2168 pr_debug("Received LACPDU on port %d\n",
2169 port->actor_port_number);
16d79d7d 2170 /* Protect against concurrent state machines */
9ac3524a 2171 __get_state_machine_lock(port);
1da177e4 2172 ad_rx_machine(lacpdu, port);
9ac3524a 2173 __release_state_machine_lock(port);
1da177e4
LT		 2174 break;
2175
2176 case AD_TYPE_MARKER:
13a8e0c8 2177 ret = RX_HANDLER_CONSUMED;
1da177e4
LT		 2178 // No need to convert fields to Little Endian since we don't use the marker's fields.
2179
1c3f0b8e 2180 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2181 case AD_MARKER_INFORMATION_SUBTYPE:
a4aee5c8
JP		 2182 pr_debug("Received Marker Information on port %d\n",
2183 port->actor_port_number);
1c3f0b8e 2184 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2185 break;
2186
2187 case AD_MARKER_RESPONSE_SUBTYPE:
a4aee5c8
JP		 2188 pr_debug("Received Marker Response on port %d\n",
2189 port->actor_port_number);
1c3f0b8e 2190 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2191 break;
2192
2193 default:
a4aee5c8
JP		 2194 pr_debug("Received an unknown Marker subtype on slot %d\n",
2195 port->actor_port_number);
1da177e4
LT		 2196 }
2197 }
2198 }
13a8e0c8 2199 return ret;
1da177e4
LT		 2200}
2201
2202/**
2203 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2204 * @slave: slave struct to work on
2205 *
2206 * Handle reselection of aggregator (if needed) for this port.
2207 */
2208void bond_3ad_adapter_speed_changed(struct slave *slave)
2209{
2210 struct port *port;
2211
2212 port = &(SLAVE_AD_INFO(slave).port);
2213
2214 // if slave is null, the whole port is not initialized
2215 if (!port->slave) {
a4aee5c8 2216 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
471cb5a3 2217 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2218 return;
2219 }
2220
2221 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2222 port->actor_oper_port_key = port->actor_admin_port_key |=
2223 (__get_link_speed(port) << 1);
5a03cdb7 2224 pr_debug("Port %d changed speed\n", port->actor_port_number);
1da177e4
LT		 2225 // there is no need to reselect a new aggregator, just signal the
2226 // state machines to reinitialize
2227 port->sm_vars |= AD_PORT_BEGIN;
2228}
2229
2230/**
2231 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2232 * @slave: slave struct to work on
2233 *
2234 * Handle reselection of aggregator (if needed) for this port.
2235 */
2236void bond_3ad_adapter_duplex_changed(struct slave *slave)
2237{
2238 struct port *port;
2239
128ea6c3 2240 port = &(SLAVE_AD_INFO(slave).port);
1da177e4
LT		 2241
2242 // if slave is null, the whole port is not initialized
2243 if (!port->slave) {
a4aee5c8 2244 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
471cb5a3 2245 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2246 return;
2247 }
2248
2249 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2250 port->actor_oper_port_key = port->actor_admin_port_key |=
2251 __get_duplex(port);
5a03cdb7 2252 pr_debug("Port %d changed duplex\n", port->actor_port_number);
1da177e4
LT		 2253 // there is no need to reselect a new aggregator, just signal the
2254 // state machines to reinitialize
2255 port->sm_vars |= AD_PORT_BEGIN;
2256}
2257
2258/**
2259 * bond_3ad_handle_link_change - handle a slave's link status change indication
2260 * @slave: slave struct to work on
2261 * @status: whether the link is now up or down
2262 *
2263 * Handle reselection of aggregator (if needed) for this port.
2264 */
2265void bond_3ad_handle_link_change(struct slave *slave, char link)
2266{
2267 struct port *port;
2268
2269 port = &(SLAVE_AD_INFO(slave).port);
2270
2271 // if slave is null, the whole port is not initialized
2272 if (!port->slave) {
a4aee5c8 2273 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
471cb5a3 2274 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2275 return;
2276 }
2277
2278 // 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)
2279 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2280 if (link == BOND_LINK_UP) {
f48127b6 2281 port->is_enabled = true;
1da177e4 2282 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2283 port->actor_oper_port_key = port->actor_admin_port_key |=
2284 __get_duplex(port);
1da177e4 2285 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2286 port->actor_oper_port_key = port->actor_admin_port_key |=
2287 (__get_link_speed(port) << 1);
1da177e4
LT		 2288 } else {
2289 /* link has failed */
f48127b6 2290 port->is_enabled = false;
1da177e4 2291 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2292 port->actor_oper_port_key = (port->actor_admin_port_key &=
2293 ~AD_SPEED_KEY_BITS);
1da177e4
LT		 2294 }
2295 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2296 // there is no need to reselect a new aggregator, just signal the
2297 // state machines to reinitialize
2298 port->sm_vars |= AD_PORT_BEGIN;
2299}
2300
ff59c456 2301/*
a361c83c 2302 * set link state for bonding master: if we have an active
ff59c456
JV		 2303 * aggregator, we're up, if not, we're down. Presumes that we cannot
2304 * have an active aggregator if there are no slaves with link up.
2305 *
031ae4de
JV		 2306 * This behavior complies with IEEE 802.3 section 43.3.9.
2307 *
ff59c456
JV		 2308 * Called by bond_set_carrier(). Return zero if carrier state does not
2309 * change, nonzero if it does.
2310 */
2311int bond_3ad_set_carrier(struct bonding *bond)
2312{
655f8919 2313 struct aggregator *active;
dec1e90e 2314 struct slave *first_slave;
655f8919 2315
be79bd04 2316 rcu_read_lock();
2317 first_slave = bond_first_slave_rcu(bond);
2318 rcu_read_unlock();
dec1e90e 2319 if (!first_slave)
2320 return 0;
2321 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator));
655f8919 2322 if (active) {
2323 /* are enough slaves available to consider link up? */
2324 if (active->num_of_ports < bond->params.min_links) {
2325 if (netif_carrier_ok(bond->dev)) {
2326 netif_carrier_off(bond->dev);
2327 return 1;
2328 }
2329 } else if (!netif_carrier_ok(bond->dev)) {
ff59c456
JV		 2330 netif_carrier_on(bond->dev);
2331 return 1;
2332 }
2333 return 0;
2334 }
2335
2336 if (netif_carrier_ok(bond->dev)) {
2337 netif_carrier_off(bond->dev);
2338 return 1;
2339 }
2340 return 0;
2341}
2342
1da177e4 2343/**
318debd8 2344 * __bond_3ad_get_active_agg_info - get information of the active aggregator
1da177e4
LT		 2345 * @bond: bonding struct to work on
2346 * @ad_info: ad_info struct to fill with the bond's info
2347 *
2348 * Returns: 0 on success
2349 * < 0 on error
2350 */
318debd8 2351int __bond_3ad_get_active_agg_info(struct bonding *bond,
2352 struct ad_info *ad_info)
1da177e4
LT		 2353{
2354 struct aggregator *aggregator = NULL;
3c4c88a1
VF		 2355 struct list_head *iter;
2356 struct slave *slave;
1da177e4
LT		 2357 struct port *port;
2358
47e91f56 2359 bond_for_each_slave_rcu(bond, slave, iter) {
3c4c88a1 2360 port = &(SLAVE_AD_INFO(slave).port);
1da177e4
LT		 2361 if (port->aggregator && port->aggregator->is_active) {
2362 aggregator = port->aggregator;
2363 break;
2364 }
2365 }
2366
2367 if (aggregator) {
2368 ad_info->aggregator_id = aggregator->aggregator_identifier;
2369 ad_info->ports = aggregator->num_of_ports;
2370 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2371 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2372 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2373 return 0;
2374 }
2375
2376 return -1;
2377}
2378
318debd8 2379/* Wrapper used to hold bond->lock so no slave manipulation can occur */
2380int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2381{
2382 int ret;
2383
47e91f56 2384 rcu_read_lock();
318debd8 2385 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
47e91f56 2386 rcu_read_unlock();
318debd8 2387
2388 return ret;
2389}
2390
1da177e4
LT		 2391int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2392{
454d7c9b 2393 struct bonding *bond = netdev_priv(dev);
c33d7887
VF		 2394 struct slave *slave, *first_ok_slave;
2395 struct aggregator *agg;
2396 struct ad_info ad_info;
9caff1e7 2397 struct list_head *iter;
1da177e4 2398 int slaves_in_agg;
c33d7887 2399 int slave_agg_no;
1da177e4 2400 int res = 1;
c33d7887 2401 int agg_id;
1da177e4 2402
318debd8 2403 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
2404 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
a4aee5c8 2405 dev->name);
1da177e4
LT		 2406 goto out;
2407 }
2408
2409 slaves_in_agg = ad_info.ports;
2410 agg_id = ad_info.aggregator_id;
2411
2412 if (slaves_in_agg == 0) {
a4aee5c8 2413 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
1da177e4
LT		 2414 goto out;
2415 }
2416
32819dc1 2417 slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg);
c33d7887 2418 first_ok_slave = NULL;
1da177e4 2419
47e91f56 2420 bond_for_each_slave_rcu(bond, slave, iter) {
c33d7887
VF		 2421 agg = SLAVE_AD_INFO(slave).port.aggregator;
2422 if (!agg || agg->aggregator_identifier != agg_id)
2423 continue;
1da177e4 2424
c33d7887
VF		 2425 if (slave_agg_no >= 0) {
2426 if (!first_ok_slave && SLAVE_IS_OK(slave))
2427 first_ok_slave = slave;
1da177e4 2428 slave_agg_no--;
c33d7887
VF		 2429 continue;
2430 }
2431
2432 if (SLAVE_IS_OK(slave)) {
2433 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2434 goto out;
1da177e4
LT		 2435 }
2436 }
2437
2438 if (slave_agg_no >= 0) {
a4aee5c8
JP		 2439 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2440 dev->name, agg_id);
1da177e4
LT		 2441 goto out;
2442 }
2443
c33d7887
VF		 2444 /* we couldn't find any suitable slave after the agg_no, so use the
2445 * first suitable found, if found. */
2446 if (first_ok_slave)
2447 res = bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
1da177e4
LT		 2448
2449out:
2450 if (res) {
2451 /* no suitable interface, frame not sent */
04502430 2452 kfree_skb(skb);
1da177e4 2453 }
0693e88e 2454
ec634fe3 2455 return NETDEV_TX_OK;
1da177e4
LT		 2456}
2457
de063b70
ED		 2458int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2459 struct slave *slave)
1da177e4 2460{
13a8e0c8 2461 int ret = RX_HANDLER_ANOTHER;
de063b70
ED		 2462 struct lacpdu *lacpdu, _lacpdu;
2463
3aba891d 2464 if (skb->protocol != PKT_TYPE_LACPDU)
13a8e0c8 2465 return ret;
b3053251 2466
de063b70
ED		 2467 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2468 if (!lacpdu)
13a8e0c8 2469 return ret;
ab12811c 2470
1da177e4 2471 read_lock(&bond->lock);
de063b70 2472 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len);
1da177e4 2473 read_unlock(&bond->lock);
13a8e0c8 2474 return ret;
1da177e4 2475}
ba824a8b
PP		 2476
2477/*
2478 * When modify lacp_rate parameter via sysfs,
2479 * update actor_oper_port_state of each port.
2480 *
2481 * Hold slave->state_machine_lock,
2482 * so we can modify port->actor_oper_port_state,
2483 * no matter bond is up or down.
2484 */
2485void bond_3ad_update_lacp_rate(struct bonding *bond)
2486{
ba824a8b 2487 struct port *port = NULL;
9caff1e7 2488 struct list_head *iter;
c509316b 2489 struct slave *slave;
ba824a8b
PP		 2490 int lacp_fast;
2491
ba824a8b 2492 lacp_fast = bond->params.lacp_fast;
9caff1e7 2493 bond_for_each_slave(bond, slave, iter) {
ba824a8b
PP		 2494 port = &(SLAVE_AD_INFO(slave).port);
2495 __get_state_machine_lock(port);
2496 if (lacp_fast)
2497 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2498 else
2499 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2500 __release_state_machine_lock(port);
2501 }
ba824a8b 2502}
Linux kernel - Deliverables
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