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l2tp: fix l2tp_ip_sendmsg() route handling
[deliverable/linux.git] / drivers / net / bonding / bond_3ad.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
7 * any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
1da177e4
LT		 21 */
22
a4aee5c8
JP		 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
1da177e4
LT		 25#include <linux/skbuff.h>
26#include <linux/if_ether.h>
27#include <linux/netdevice.h>
28#include <linux/spinlock.h>
29#include <linux/ethtool.h>
fd989c83 30#include <linux/etherdevice.h>
1da177e4
LT		 31#include <linux/if_bonding.h>
32#include <linux/pkt_sched.h>
e730c155 33#include <net/net_namespace.h>
1da177e4
LT		 34#include "bonding.h"
35#include "bond_3ad.h"
36
37// General definitions
38#define AD_SHORT_TIMEOUT 1
39#define AD_LONG_TIMEOUT 0
40#define AD_STANDBY 0x2
41#define AD_MAX_TX_IN_SECOND 3
42#define AD_COLLECTOR_MAX_DELAY 0
43
44// Timer definitions(43.4.4 in the 802.3ad standard)
45#define AD_FAST_PERIODIC_TIME 1
46#define AD_SLOW_PERIODIC_TIME 30
47#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
48#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
49#define AD_CHURN_DETECTION_TIME 60
50#define AD_AGGREGATE_WAIT_TIME 2
51
52// Port state definitions(43.4.2.2 in the 802.3ad standard)
53#define AD_STATE_LACP_ACTIVITY 0x1
54#define AD_STATE_LACP_TIMEOUT 0x2
55#define AD_STATE_AGGREGATION 0x4
56#define AD_STATE_SYNCHRONIZATION 0x8
57#define AD_STATE_COLLECTING 0x10
58#define AD_STATE_DISTRIBUTING 0x20
59#define AD_STATE_DEFAULTED 0x40
60#define AD_STATE_EXPIRED 0x80
61
62// Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
63#define AD_PORT_BEGIN 0x1
64#define AD_PORT_LACP_ENABLED 0x2
65#define AD_PORT_ACTOR_CHURN 0x4
66#define AD_PORT_PARTNER_CHURN 0x8
67#define AD_PORT_READY 0x10
68#define AD_PORT_READY_N 0x20
69#define AD_PORT_MATCHED 0x40
70#define AD_PORT_STANDBY 0x80
71#define AD_PORT_SELECTED 0x100
72#define AD_PORT_MOVED 0x200
73
74// Port Key definitions
75// key is determined according to the link speed, duplex and
76// user key(which is yet not supported)
77// ------------------------------------------------------------
78// Port key : | User key | Speed |Duplex|
79// ------------------------------------------------------------
80// 16 6 1 0
81#define AD_DUPLEX_KEY_BITS 0x1
82#define AD_SPEED_KEY_BITS 0x3E
83#define AD_USER_KEY_BITS 0xFFC0
84
85//dalloun
86#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
87#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
88#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
89#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
94dbffd5 90#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
1da177e4
LT		 91//endalloun
92
93// compare MAC addresses
94#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
95
128ea6c3 96static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
1da177e4
LT		 97static u16 ad_ticks_per_sec;
98static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
99
e4ac4320
HE		 100static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
101
1da177e4
LT		 102// ================= main 802.3ad protocol functions ==================
103static int ad_lacpdu_send(struct port *port);
1c3f0b8e 104static int ad_marker_send(struct port *port, struct bond_marker *marker);
1da177e4
LT		 105static void ad_mux_machine(struct port *port);
106static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
107static void ad_tx_machine(struct port *port);
108static void ad_periodic_machine(struct port *port);
109static void ad_port_selection_logic(struct port *port);
110static void ad_agg_selection_logic(struct aggregator *aggregator);
111static void ad_clear_agg(struct aggregator *aggregator);
112static void ad_initialize_agg(struct aggregator *aggregator);
113static void ad_initialize_port(struct port *port, int lacp_fast);
1da177e4
LT		 114static void ad_enable_collecting_distributing(struct port *port);
115static void ad_disable_collecting_distributing(struct port *port);
1c3f0b8e
MD		 116static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
117static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
1da177e4
LT		 118
119
120/////////////////////////////////////////////////////////////////////////////////
121// ================= api to bonding and kernel code ==================
122/////////////////////////////////////////////////////////////////////////////////
123
124/**
125 * __get_bond_by_port - get the port's bonding struct
126 * @port: the port we're looking at
127 *
128 * Return @port's bonding struct, or %NULL if it can't be found.
129 */
130static inline struct bonding *__get_bond_by_port(struct port *port)
131{
7bfc4753 132 if (port->slave == NULL)
1da177e4 133 return NULL;
1da177e4
LT		 134
135 return bond_get_bond_by_slave(port->slave);
136}
137
138/**
139 * __get_first_port - get the first port in the bond
140 * @bond: the bond we're looking at
141 *
142 * Return the port of the first slave in @bond, or %NULL if it can't be found.
143 */
144static inline struct port *__get_first_port(struct bonding *bond)
145{
7bfc4753 146 if (bond->slave_cnt == 0)
1da177e4 147 return NULL;
1da177e4
LT		 148
149 return &(SLAVE_AD_INFO(bond->first_slave).port);
150}
151
152/**
153 * __get_next_port - get the next port in the bond
154 * @port: the port we're looking at
155 *
156 * Return the port of the slave that is next in line of @port's slave in the
157 * bond, or %NULL if it can't be found.
158 */
159static inline struct port *__get_next_port(struct port *port)
160{
161 struct bonding *bond = __get_bond_by_port(port);
162 struct slave *slave = port->slave;
163
164 // If there's no bond for this port, or this is the last slave
7bfc4753 165 if ((bond == NULL) || (slave->next == bond->first_slave))
1da177e4 166 return NULL;
1da177e4
LT		 167
168 return &(SLAVE_AD_INFO(slave->next).port);
169}
170
171/**
172 * __get_first_agg - get the first aggregator in the bond
173 * @bond: the bond we're looking at
174 *
175 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
176 * found.
177 */
178static inline struct aggregator *__get_first_agg(struct port *port)
179{
180 struct bonding *bond = __get_bond_by_port(port);
181
182 // If there's no bond for this port, or bond has no slaves
7bfc4753 183 if ((bond == NULL) || (bond->slave_cnt == 0))
1da177e4 184 return NULL;
1da177e4
LT		 185
186 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
187}
188
189/**
190 * __get_next_agg - get the next aggregator in the bond
191 * @aggregator: the aggregator we're looking at
192 *
193 * Return the aggregator of the slave that is next in line of @aggregator's
194 * slave in the bond, or %NULL if it can't be found.
195 */
196static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
197{
198 struct slave *slave = aggregator->slave;
199 struct bonding *bond = bond_get_bond_by_slave(slave);
200
201 // If there's no bond for this aggregator, or this is the last slave
7bfc4753 202 if ((bond == NULL) || (slave->next == bond->first_slave))
1da177e4 203 return NULL;
1da177e4
LT		 204
205 return &(SLAVE_AD_INFO(slave->next).aggregator);
206}
207
fd989c83
JV		 208/*
209 * __agg_has_partner
210 *
211 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
212 * address for the partner). Return 0 if not.
213 */
214static inline int __agg_has_partner(struct aggregator *agg)
215{
216 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
217}
218
1da177e4
LT		 219/**
220 * __disable_port - disable the port's slave
221 * @port: the port we're looking at
222 *
223 */
224static inline void __disable_port(struct port *port)
225{
226 bond_set_slave_inactive_flags(port->slave);
227}
228
229/**
230 * __enable_port - enable the port's slave, if it's up
231 * @port: the port we're looking at
232 *
233 */
234static inline void __enable_port(struct port *port)
235{
236 struct slave *slave = port->slave;
237
7bfc4753 238 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
1da177e4 239 bond_set_slave_active_flags(slave);
1da177e4
LT		 240}
241
242/**
243 * __port_is_enabled - check if the port's slave is in active state
244 * @port: the port we're looking at
245 *
246 */
247static inline int __port_is_enabled(struct port *port)
248{
e30bc066 249 return bond_is_active_slave(port->slave);
1da177e4
LT		 250}
251
252/**
253 * __get_agg_selection_mode - get the aggregator selection mode
254 * @port: the port we're looking at
255 *
fd989c83 256 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 257 */
258static inline u32 __get_agg_selection_mode(struct port *port)
259{
260 struct bonding *bond = __get_bond_by_port(port);
261
7bfc4753 262 if (bond == NULL)
fd989c83 263 return BOND_AD_STABLE;
1da177e4 264
1a14fbcb 265 return bond->params.ad_select;
1da177e4
LT		 266}
267
268/**
269 * __check_agg_selection_timer - check if the selection timer has expired
270 * @port: the port we're looking at
271 *
272 */
273static inline int __check_agg_selection_timer(struct port *port)
274{
275 struct bonding *bond = __get_bond_by_port(port);
276
7bfc4753 277 if (bond == NULL)
1da177e4 278 return 0;
1da177e4
LT		 279
280 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
281}
282
283/**
9ac3524a 284 * __get_state_machine_lock - lock the port's state machines
1da177e4
LT		 285 * @port: the port we're looking at
286 *
287 */
9ac3524a 288static inline void __get_state_machine_lock(struct port *port)
1da177e4 289{
9ac3524a 290 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 291}
292
293/**
9ac3524a 294 * __release_state_machine_lock - unlock the port's state machines
1da177e4
LT		 295 * @port: the port we're looking at
296 *
297 */
9ac3524a 298static inline void __release_state_machine_lock(struct port *port)
1da177e4 299{
9ac3524a 300 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 301}
302
303/**
304 * __get_link_speed - get a port's speed
305 * @port: the port we're looking at
306 *
307 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
308 * 0,
309 * %AD_LINK_SPEED_BITMASK_10MBPS,
310 * %AD_LINK_SPEED_BITMASK_100MBPS,
94dbffd5
JV		 311 * %AD_LINK_SPEED_BITMASK_1000MBPS,
312 * %AD_LINK_SPEED_BITMASK_10000MBPS
1da177e4
LT		 313 */
314static u16 __get_link_speed(struct port *port)
315{
316 struct slave *slave = port->slave;
317 u16 speed;
318
319 /* this if covers only a special case: when the configuration starts with
320 * link down, it sets the speed to 0.
321 * This is done in spite of the fact that the e100 driver reports 0 to be
322 * compatible with MVT in the future.*/
7bfc4753 323 if (slave->link != BOND_LINK_UP)
128ea6c3 324 speed = 0;
7bfc4753 325 else {
1da177e4
LT		 326 switch (slave->speed) {
327 case SPEED_10:
328 speed = AD_LINK_SPEED_BITMASK_10MBPS;
329 break;
330
331 case SPEED_100:
332 speed = AD_LINK_SPEED_BITMASK_100MBPS;
333 break;
334
335 case SPEED_1000:
336 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
337 break;
338
94dbffd5
JV		 339 case SPEED_10000:
340 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
341 break;
342
1da177e4
LT		 343 default:
344 speed = 0; // unknown speed value from ethtool. shouldn't happen
345 break;
346 }
347 }
348
a4aee5c8
JP		 349 pr_debug("Port %d Received link speed %d update from adapter\n",
350 port->actor_port_number, speed);
1da177e4
LT		 351 return speed;
352}
353
354/**
355 * __get_duplex - get a port's duplex
356 * @port: the port we're looking at
357 *
358 * Return @port's duplex in 802.3ad bitmask format. i.e.:
359 * 0x01 if in full duplex
360 * 0x00 otherwise
361 */
362static u8 __get_duplex(struct port *port)
363{
364 struct slave *slave = port->slave;
365
366 u8 retval;
367
368 // handling a special case: when the configuration starts with
369 // link down, it sets the duplex to 0.
7bfc4753 370 if (slave->link != BOND_LINK_UP)
128ea6c3 371 retval = 0x0;
7bfc4753 372 else {
1da177e4
LT		 373 switch (slave->duplex) {
374 case DUPLEX_FULL:
128ea6c3 375 retval = 0x1;
a4aee5c8
JP		 376 pr_debug("Port %d Received status full duplex update from adapter\n",
377 port->actor_port_number);
1da177e4
LT		 378 break;
379 case DUPLEX_HALF:
380 default:
128ea6c3 381 retval = 0x0;
a4aee5c8
JP		 382 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
383 port->actor_port_number);
1da177e4
LT		 384 break;
385 }
386 }
387 return retval;
388}
389
390/**
9ac3524a 391 * __initialize_port_locks - initialize a port's STATE machine spinlock
1da177e4
LT		 392 * @port: the port we're looking at
393 *
394 */
395static inline void __initialize_port_locks(struct port *port)
396{
397 // make sure it isn't called twice
9ac3524a 398 spin_lock_init(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 399}
400
401//conversions
1da177e4
LT		 402
403/**
404 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
405 * @timer_type: which timer to operate
406 * @par: timer parameter. see below
407 *
408 * If @timer_type is %current_while_timer, @par indicates long/short timer.
409 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
410 * %SLOW_PERIODIC_TIME.
411 */
412static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
413{
128ea6c3 414 u16 retval = 0; /* to silence the compiler */
1da177e4
LT		 415
416 switch (timer_type) {
417 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
7bfc4753 418 if (par)
1da177e4 419 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
7bfc4753 420 else
1da177e4 421 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
1da177e4
LT		 422 break;
423 case AD_ACTOR_CHURN_TIMER: // for local churn machine
424 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
425 break;
426 case AD_PERIODIC_TIMER: // for periodic machine
427 retval = (par*ad_ticks_per_sec); // long timeout
428 break;
429 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
430 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
431 break;
432 case AD_WAIT_WHILE_TIMER: // for selection machine
433 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
434 break;
435 }
436 return retval;
437}
438
439
440/////////////////////////////////////////////////////////////////////////////////
441// ================= ad_rx_machine helper functions ==================
442/////////////////////////////////////////////////////////////////////////////////
443
2d6682db
JV		 444/**
445 * __choose_matched - update a port's matched variable from a received lacpdu
446 * @lacpdu: the lacpdu we've received
447 * @port: the port we're looking at
448 *
449 * Update the value of the matched variable, using parameter values from a
450 * newly received lacpdu. Parameter values for the partner carried in the
451 * received PDU are compared with the corresponding operational parameter
452 * values for the actor. Matched is set to TRUE if all of these parameters
453 * match and the PDU parameter partner_state.aggregation has the same value as
454 * actor_oper_port_state.aggregation and lacp will actively maintain the link
455 * in the aggregation. Matched is also set to TRUE if the value of
456 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
457 * an individual link and lacp will actively maintain the link. Otherwise,
458 * matched is set to FALSE. LACP is considered to be actively maintaining the
459 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
460 * the actor's actor_oper_port_state.lacp_activity and the PDU's
461 * partner_state.lacp_activity variables are TRUE.
462 *
463 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
464 * used here to implement the language from 802.3ad 43.4.9 that requires
465 * recordPDU to "match" the LACPDU parameters to the stored values.
466 */
467static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
468{
469 // check if all parameters are alike
470 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
471 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
472 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
473 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
474 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
475 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
476 // or this is individual link(aggregation == FALSE)
477 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
478 ) {
479 // update the state machine Matched variable
480 port->sm_vars |= AD_PORT_MATCHED;
481 } else {
482 port->sm_vars &= ~AD_PORT_MATCHED;
483 }
484}
485
1da177e4
LT		 486/**
487 * __record_pdu - record parameters from a received lacpdu
488 * @lacpdu: the lacpdu we've received
489 * @port: the port we're looking at
490 *
491 * Record the parameter values for the Actor carried in a received lacpdu as
492 * the current partner operational parameter values and sets
493 * actor_oper_port_state.defaulted to FALSE.
494 */
495static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
496{
1da177e4 497 if (lacpdu && port) {
b99d6ba9
HE		 498 struct port_params *partner = &port->partner_oper;
499
2d6682db 500 __choose_matched(lacpdu, port);
1da177e4 501 // record the new parameter values for the partner operational
b99d6ba9
HE		 502 partner->port_number = ntohs(lacpdu->actor_port);
503 partner->port_priority = ntohs(lacpdu->actor_port_priority);
504 partner->system = lacpdu->actor_system;
505 partner->system_priority = ntohs(lacpdu->actor_system_priority);
506 partner->key = ntohs(lacpdu->actor_key);
507 partner->port_state = lacpdu->actor_state;
1da177e4
LT		 508
509 // set actor_oper_port_state.defaulted to FALSE
510 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
511
512 // set the partner sync. to on if the partner is sync. and the port is matched
7bfc4753
BD		 513 if ((port->sm_vars & AD_PORT_MATCHED)
514 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
b99d6ba9 515 partner->port_state |= AD_STATE_SYNCHRONIZATION;
7bfc4753 516 else
b99d6ba9 517 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 518 }
519}
520
521/**
522 * __record_default - record default parameters
523 * @port: the port we're looking at
524 *
525 * This function records the default parameter values for the partner carried
526 * in the Partner Admin parameters as the current partner operational parameter
527 * values and sets actor_oper_port_state.defaulted to TRUE.
528 */
529static void __record_default(struct port *port)
530{
1da177e4
LT		 531 if (port) {
532 // record the partner admin parameters
5eefd1ad
HE		 533 memcpy(&port->partner_oper, &port->partner_admin,
534 sizeof(struct port_params));
1da177e4
LT		 535
536 // set actor_oper_port_state.defaulted to true
537 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
538 }
539}
540
541/**
542 * __update_selected - update a port's Selected variable from a received lacpdu
543 * @lacpdu: the lacpdu we've received
544 * @port: the port we're looking at
545 *
546 * Update the value of the selected variable, using parameter values from a
547 * newly received lacpdu. The parameter values for the Actor carried in the
548 * received PDU are compared with the corresponding operational parameter
549 * values for the ports partner. If one or more of the comparisons shows that
550 * the value(s) received in the PDU differ from the current operational values,
551 * then selected is set to FALSE and actor_oper_port_state.synchronization is
552 * set to out_of_sync. Otherwise, selected remains unchanged.
553 */
554static void __update_selected(struct lacpdu *lacpdu, struct port *port)
555{
1da177e4 556 if (lacpdu && port) {
ce6a49ad
HE		 557 const struct port_params *partner = &port->partner_oper;
558
1da177e4 559 // check if any parameter is different
8e95a202
JP		 560 if (ntohs(lacpdu->actor_port) != partner->port_number ||
561 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
562 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
563 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
564 ntohs(lacpdu->actor_key) != partner->key ||
565 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 566 // update the state machine Selected variable
567 port->sm_vars &= ~AD_PORT_SELECTED;
568 }
569 }
570}
571
572/**
573 * __update_default_selected - update a port's Selected variable from Partner
574 * @port: the port we're looking at
575 *
576 * This function updates the value of the selected variable, using the partner
577 * administrative parameter values. The administrative values are compared with
578 * the corresponding operational parameter values for the partner. If one or
579 * more of the comparisons shows that the administrative value(s) differ from
580 * the current operational values, then Selected is set to FALSE and
581 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
582 * Selected remains unchanged.
583 */
584static void __update_default_selected(struct port *port)
585{
1da177e4 586 if (port) {
3c52065f
HE		 587 const struct port_params *admin = &port->partner_admin;
588 const struct port_params *oper = &port->partner_oper;
589
1da177e4 590 // check if any parameter is different
8e95a202
JP		 591 if (admin->port_number != oper->port_number ||
592 admin->port_priority != oper->port_priority ||
593 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
594 admin->system_priority != oper->system_priority ||
595 admin->key != oper->key ||
596 (admin->port_state & AD_STATE_AGGREGATION)
3c52065f 597 != (oper->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 598 // update the state machine Selected variable
599 port->sm_vars &= ~AD_PORT_SELECTED;
600 }
601 }
602}
603
1da177e4
LT		 604/**
605 * __update_ntt - update a port's ntt variable from a received lacpdu
606 * @lacpdu: the lacpdu we've received
607 * @port: the port we're looking at
608 *
609 * Updates the value of the ntt variable, using parameter values from a newly
610 * received lacpdu. The parameter values for the partner carried in the
611 * received PDU are compared with the corresponding operational parameter
612 * values for the Actor. If one or more of the comparisons shows that the
613 * value(s) received in the PDU differ from the current operational values,
614 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
615 */
616static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
617{
618 // validate lacpdu and port
619 if (lacpdu && port) {
620 // check if any parameter is different
89cc76f9
JV		 621 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
622 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
1da177e4 623 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 624 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
625 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 626 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
627 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
628 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
629 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
630 ) {
d238d458
HE		 631
632 port->ntt = true;
1da177e4
LT		 633 }
634 }
635}
636
637/**
638 * __attach_bond_to_agg
639 * @port: the port we're looking at
640 *
641 * Handle the attaching of the port's control parser/multiplexer and the
642 * aggregator. This function does nothing since the parser/multiplexer of the
643 * receive and the parser/multiplexer of the aggregator are already combined.
644 */
645static void __attach_bond_to_agg(struct port *port)
646{
128ea6c3 647 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 648 // This function does nothing since the parser/multiplexer of the receive
649 // and the parser/multiplexer of the aggregator are already combined
650}
651
652/**
653 * __detach_bond_from_agg
654 * @port: the port we're looking at
655 *
656 * Handle the detaching of the port's control parser/multiplexer from the
657 * aggregator. This function does nothing since the parser/multiplexer of the
658 * receive and the parser/multiplexer of the aggregator are already combined.
659 */
660static void __detach_bond_from_agg(struct port *port)
661{
128ea6c3 662 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 663 // This function does nothing sience the parser/multiplexer of the receive
664 // and the parser/multiplexer of the aggregator are already combined
665}
666
667/**
668 * __agg_ports_are_ready - check if all ports in an aggregator are ready
669 * @aggregator: the aggregator we're looking at
670 *
671 */
672static int __agg_ports_are_ready(struct aggregator *aggregator)
673{
674 struct port *port;
675 int retval = 1;
676
677 if (aggregator) {
678 // scan all ports in this aggregator to verfy if they are all ready
128ea6c3
BD		 679 for (port = aggregator->lag_ports;
680 port;
681 port = port->next_port_in_aggregator) {
1da177e4
LT		 682 if (!(port->sm_vars & AD_PORT_READY_N)) {
683 retval = 0;
684 break;
685 }
686 }
687 }
688
689 return retval;
690}
691
692/**
693 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
694 * @aggregator: the aggregator we're looking at
695 * @val: Should the ports' ready bit be set on or off
696 *
697 */
698static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
699{
700 struct port *port;
701
128ea6c3
BD		 702 for (port = aggregator->lag_ports; port;
703 port = port->next_port_in_aggregator) {
7bfc4753 704 if (val)
1da177e4 705 port->sm_vars |= AD_PORT_READY;
7bfc4753 706 else
1da177e4 707 port->sm_vars &= ~AD_PORT_READY;
1da177e4
LT		 708 }
709}
710
711/**
712 * __get_agg_bandwidth - get the total bandwidth of an aggregator
713 * @aggregator: the aggregator we're looking at
714 *
715 */
716static u32 __get_agg_bandwidth(struct aggregator *aggregator)
717{
128ea6c3 718 u32 bandwidth = 0;
1da177e4
LT		 719
720 if (aggregator->num_of_ports) {
65cce19c 721 switch (__get_link_speed(aggregator->lag_ports)) {
1da177e4
LT		 722 case AD_LINK_SPEED_BITMASK_1MBPS:
723 bandwidth = aggregator->num_of_ports;
724 break;
725 case AD_LINK_SPEED_BITMASK_10MBPS:
726 bandwidth = aggregator->num_of_ports * 10;
727 break;
728 case AD_LINK_SPEED_BITMASK_100MBPS:
729 bandwidth = aggregator->num_of_ports * 100;
730 break;
731 case AD_LINK_SPEED_BITMASK_1000MBPS:
732 bandwidth = aggregator->num_of_ports * 1000;
733 break;
94dbffd5
JV		 734 case AD_LINK_SPEED_BITMASK_10000MBPS:
735 bandwidth = aggregator->num_of_ports * 10000;
736 break;
1da177e4 737 default:
128ea6c3 738 bandwidth = 0; /*to silence the compiler ....*/
1da177e4
LT		 739 }
740 }
741 return bandwidth;
742}
743
744/**
745 * __get_active_agg - get the current active aggregator
746 * @aggregator: the aggregator we're looking at
747 *
748 */
749static struct aggregator *__get_active_agg(struct aggregator *aggregator)
750{
751 struct aggregator *retval = NULL;
752
753 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
754 if (aggregator->is_active) {
755 retval = aggregator;
756 break;
757 }
758 }
759
760 return retval;
761}
762
763/**
764 * __update_lacpdu_from_port - update a port's lacpdu fields
765 * @port: the port we're looking at
766 *
767 */
768static inline void __update_lacpdu_from_port(struct port *port)
769{
770 struct lacpdu *lacpdu = &port->lacpdu;
3b5b35d0 771 const struct port_params *partner = &port->partner_oper;
1da177e4
LT		 772
773 /* update current actual Actor parameters */
774 /* lacpdu->subtype initialized
775 * lacpdu->version_number initialized
776 * lacpdu->tlv_type_actor_info initialized
777 * lacpdu->actor_information_length initialized
778 */
779
d3bb52b0 780 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 781 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 782 lacpdu->actor_key = htons(port->actor_oper_port_key);
783 lacpdu->actor_port_priority = htons(port->actor_port_priority);
784 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4
LT		 785 lacpdu->actor_state = port->actor_oper_port_state;
786
787 /* lacpdu->reserved_3_1 initialized
788 * lacpdu->tlv_type_partner_info initialized
789 * lacpdu->partner_information_length initialized
790 */
791
3b5b35d0
HE		 792 lacpdu->partner_system_priority = htons(partner->system_priority);
793 lacpdu->partner_system = partner->system;
794 lacpdu->partner_key = htons(partner->key);
795 lacpdu->partner_port_priority = htons(partner->port_priority);
796 lacpdu->partner_port = htons(partner->port_number);
797 lacpdu->partner_state = partner->port_state;
1da177e4
LT		 798
799 /* lacpdu->reserved_3_2 initialized
800 * lacpdu->tlv_type_collector_info initialized
801 * lacpdu->collector_information_length initialized
802 * collector_max_delay initialized
803 * reserved_12[12] initialized
804 * tlv_type_terminator initialized
805 * terminator_length initialized
806 * reserved_50[50] initialized
807 */
1da177e4
LT		 808}
809
810//////////////////////////////////////////////////////////////////////////////////////
811// ================= main 802.3ad protocol code ======================================
812//////////////////////////////////////////////////////////////////////////////////////
813
814/**
815 * ad_lacpdu_send - send out a lacpdu packet on a given port
816 * @port: the port we're looking at
817 *
818 * Returns: 0 on success
819 * < 0 on error
820 */
821static int ad_lacpdu_send(struct port *port)
822{
823 struct slave *slave = port->slave;
824 struct sk_buff *skb;
825 struct lacpdu_header *lacpdu_header;
826 int length = sizeof(struct lacpdu_header);
1da177e4
LT		 827
828 skb = dev_alloc_skb(length);
7bfc4753 829 if (!skb)
1da177e4 830 return -ENOMEM;
1da177e4
LT		 831
832 skb->dev = slave->dev;
459a98ed 833 skb_reset_mac_header(skb);
b0e380b1 834 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 835 skb->protocol = PKT_TYPE_LACPDU;
836 skb->priority = TC_PRIO_CONTROL;
837
838 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
839
e727149e 840 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 841 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 842 because we use it to identify loopback lacpdus in receive. */
e727149e
HE		 843 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
844 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 845
846 lacpdu_header->lacpdu = port->lacpdu; // struct copy
847
848 dev_queue_xmit(skb);
849
850 return 0;
851}
852
853/**
854 * ad_marker_send - send marker information/response on a given port
855 * @port: the port we're looking at
856 * @marker: marker data to send
857 *
858 * Returns: 0 on success
859 * < 0 on error
860 */
1c3f0b8e 861static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 862{
863 struct slave *slave = port->slave;
864 struct sk_buff *skb;
1c3f0b8e
MD		 865 struct bond_marker_header *marker_header;
866 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 867
868 skb = dev_alloc_skb(length + 16);
7bfc4753 869 if (!skb)
1da177e4 870 return -ENOMEM;
1da177e4
LT		 871
872 skb_reserve(skb, 16);
873
874 skb->dev = slave->dev;
459a98ed 875 skb_reset_mac_header(skb);
b0e380b1 876 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 877 skb->protocol = PKT_TYPE_LACPDU;
878
1c3f0b8e 879 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4 880
e727149e 881 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 882 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 883 because we use it to identify loopback MARKERs in receive. */
e727149e
HE		 884 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
885 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 886
887 marker_header->marker = *marker; // struct copy
888
889 dev_queue_xmit(skb);
890
891 return 0;
892}
893
894/**
895 * ad_mux_machine - handle a port's mux state machine
896 * @port: the port we're looking at
897 *
898 */
899static void ad_mux_machine(struct port *port)
900{
901 mux_states_t last_state;
902
903 // keep current State Machine state to compare later if it was changed
904 last_state = port->sm_mux_state;
905
906 if (port->sm_vars & AD_PORT_BEGIN) {
907 port->sm_mux_state = AD_MUX_DETACHED; // next state
908 } else {
909 switch (port->sm_mux_state) {
910 case AD_MUX_DETACHED:
7bfc4753
BD		 911 if ((port->sm_vars & AD_PORT_SELECTED)
912 || (port->sm_vars & AD_PORT_STANDBY))
913 /* if SELECTED or STANDBY */
1da177e4 914 port->sm_mux_state = AD_MUX_WAITING; // next state
1da177e4
LT		 915 break;
916 case AD_MUX_WAITING:
917 // if SELECTED == FALSE return to DETACH state
918 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
919 port->sm_vars &= ~AD_PORT_READY_N;
920 // in order to withhold the Selection Logic to check all ports READY_N value
921 // every callback cycle to update ready variable, we check READY_N and update READY here
922 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
923 port->sm_mux_state = AD_MUX_DETACHED; // next state
924 break;
925 }
926
927 // check if the wait_while_timer expired
7bfc4753
BD		 928 if (port->sm_mux_timer_counter
929 && !(--port->sm_mux_timer_counter))
1da177e4 930 port->sm_vars |= AD_PORT_READY_N;
1da177e4
LT		 931
932 // in order to withhold the selection logic to check all ports READY_N value
933 // every callback cycle to update ready variable, we check READY_N and update READY here
934 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
935
936 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
7bfc4753
BD		 937 if ((port->sm_vars & AD_PORT_READY)
938 && !port->sm_mux_timer_counter)
1da177e4 939 port->sm_mux_state = AD_MUX_ATTACHED; // next state
1da177e4
LT		 940 break;
941 case AD_MUX_ATTACHED:
942 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
1055c9ab 943 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
1da177e4
LT		 944 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
945 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
946 port->sm_vars &= ~AD_PORT_READY_N;
947 // in order to withhold the selection logic to check all ports READY_N value
948 // every callback cycle to update ready variable, we check READY_N and update READY here
949 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
950 port->sm_mux_state = AD_MUX_DETACHED;// next state
951 }
952 break;
953 case AD_MUX_COLLECTING_DISTRIBUTING:
954 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
1055c9ab 955 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
1da177e4
LT		 956 ) {
957 port->sm_mux_state = AD_MUX_ATTACHED;// next state
958
959 } else {
960 // if port state hasn't changed make
961 // sure that a collecting distributing
962 // port in an active aggregator is enabled
963 if (port->aggregator &&
964 port->aggregator->is_active &&
965 !__port_is_enabled(port)) {
966
967 __enable_port(port);
968 }
969 }
970 break;
971 default: //to silence the compiler
972 break;
973 }
974 }
975
976 // check if the state machine was changed
977 if (port->sm_mux_state != last_state) {
a4aee5c8
JP		 978 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
979 port->actor_port_number, last_state,
980 port->sm_mux_state);
1da177e4
LT		 981 switch (port->sm_mux_state) {
982 case AD_MUX_DETACHED:
983 __detach_bond_from_agg(port);
984 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
985 ad_disable_collecting_distributing(port);
986 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
987 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
d238d458 988 port->ntt = true;
1da177e4
LT		 989 break;
990 case AD_MUX_WAITING:
991 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
992 break;
993 case AD_MUX_ATTACHED:
994 __attach_bond_to_agg(port);
995 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
996 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
997 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
998 ad_disable_collecting_distributing(port);
d238d458 999 port->ntt = true;
1da177e4
LT		 1000 break;
1001 case AD_MUX_COLLECTING_DISTRIBUTING:
1002 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1003 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1004 ad_enable_collecting_distributing(port);
d238d458 1005 port->ntt = true;
1da177e4
LT		 1006 break;
1007 default: //to silence the compiler
1008 break;
1009 }
1010 }
1011}
1012
1013/**
1014 * ad_rx_machine - handle a port's rx State Machine
1015 * @lacpdu: the lacpdu we've received
1016 * @port: the port we're looking at
1017 *
1018 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1019 * CURRENT. If timer expired set the state machine in the proper state.
1020 * In other cases, this function checks if we need to switch to other state.
1021 */
1022static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1023{
1024 rx_states_t last_state;
1025
1da177e4
LT		 1026 // keep current State Machine state to compare later if it was changed
1027 last_state = port->sm_rx_state;
1028
1029 // check if state machine should change state
1030 // first, check if port was reinitialized
7bfc4753
BD		 1031 if (port->sm_vars & AD_PORT_BEGIN)
1032 /* next state */
1033 port->sm_rx_state = AD_RX_INITIALIZE;
1da177e4 1034 // check if port is not enabled
7bfc4753
BD		 1035 else if (!(port->sm_vars & AD_PORT_BEGIN)
1036 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1037 /* next state */
1038 port->sm_rx_state = AD_RX_PORT_DISABLED;
1da177e4
LT		 1039 // check if new lacpdu arrived
1040 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1041 port->sm_rx_timer_counter = 0; // zero timer
1042 port->sm_rx_state = AD_RX_CURRENT;
1043 } else {
1044 // if timer is on, and if it is expired
1045 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1046 switch (port->sm_rx_state) {
1047 case AD_RX_EXPIRED:
1048 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1049 break;
1050 case AD_RX_CURRENT:
1051 port->sm_rx_state = AD_RX_EXPIRED; // next state
1052 break;
1053 default: //to silence the compiler
1054 break;
1055 }
1056 } else {
1057 // if no lacpdu arrived and no timer is on
1058 switch (port->sm_rx_state) {
1059 case AD_RX_PORT_DISABLED:
7bfc4753 1060 if (port->sm_vars & AD_PORT_MOVED)
1da177e4 1061 port->sm_rx_state = AD_RX_INITIALIZE; // next state
7bfc4753
BD		 1062 else if (port->is_enabled
1063 && (port->sm_vars
1064 & AD_PORT_LACP_ENABLED))
1da177e4 1065 port->sm_rx_state = AD_RX_EXPIRED; // next state
7bfc4753
BD		 1066 else if (port->is_enabled
1067 && ((port->sm_vars
1068 & AD_PORT_LACP_ENABLED) == 0))
1da177e4 1069 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1da177e4
LT		 1070 break;
1071 default: //to silence the compiler
1072 break;
1073
1074 }
1075 }
1076 }
1077
1078 // check if the State machine was changed or new lacpdu arrived
1079 if ((port->sm_rx_state != last_state) || (lacpdu)) {
a4aee5c8
JP		 1080 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1081 port->actor_port_number, last_state,
1082 port->sm_rx_state);
1da177e4
LT		 1083 switch (port->sm_rx_state) {
1084 case AD_RX_INITIALIZE:
7bfc4753 1085 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1086 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
7bfc4753 1087 else
1da177e4 1088 port->sm_vars |= AD_PORT_LACP_ENABLED;
1da177e4
LT		 1089 port->sm_vars &= ~AD_PORT_SELECTED;
1090 __record_default(port);
1091 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1092 port->sm_vars &= ~AD_PORT_MOVED;
1093 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1094
1095 /*- Fall Through -*/
1096
1097 case AD_RX_PORT_DISABLED:
1098 port->sm_vars &= ~AD_PORT_MATCHED;
1099 break;
1100 case AD_RX_LACP_DISABLED:
1101 port->sm_vars &= ~AD_PORT_SELECTED;
1102 __record_default(port);
1055c9ab 1103 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1104 port->sm_vars |= AD_PORT_MATCHED;
1105 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1106 break;
1107 case AD_RX_EXPIRED:
1108 //Reset of the Synchronization flag. (Standard 43.4.12)
1109 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1110 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1055c9ab 1111 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1112 port->sm_vars &= ~AD_PORT_MATCHED;
8e321c4f
JL		 1113 port->partner_oper.port_state |=
1114 AD_STATE_LACP_ACTIVITY;
1da177e4
LT		 1115 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1116 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1117 break;
1118 case AD_RX_DEFAULTED:
1119 __update_default_selected(port);
1120 __record_default(port);
1121 port->sm_vars |= AD_PORT_MATCHED;
1122 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1123 break;
1124 case AD_RX_CURRENT:
1125 // detect loopback situation
1126 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1127 // INFO_RECEIVED_LOOPBACK_FRAMES
a4aee5c8
JP		 1128 pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
1129 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
4e0952c7 1130 port->slave->dev->master->name, port->slave->dev->name);
1da177e4
LT		 1131 return;
1132 }
1133 __update_selected(lacpdu, port);
1134 __update_ntt(lacpdu, port);
1135 __record_pdu(lacpdu, port);
1da177e4
LT		 1136 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1137 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1138 // verify that if the aggregator is enabled, the port is enabled too.
1139 //(because if the link goes down for a short time, the 802.3ad will not
1140 // catch it, and the port will continue to be disabled)
7bfc4753
BD		 1141 if (port->aggregator
1142 && port->aggregator->is_active
1143 && !__port_is_enabled(port))
1da177e4 1144 __enable_port(port);
1da177e4
LT		 1145 break;
1146 default: //to silence the compiler
1147 break;
1148 }
1149 }
1da177e4
LT		 1150}
1151
1152/**
1153 * ad_tx_machine - handle a port's tx state machine
1154 * @port: the port we're looking at
1155 *
1156 */
1157static void ad_tx_machine(struct port *port)
1158{
1159 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1160 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1161 // check if there is something to send
1162 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1163 __update_lacpdu_from_port(port);
d238d458 1164
1da177e4 1165 if (ad_lacpdu_send(port) >= 0) {
a4aee5c8
JP		 1166 pr_debug("Sent LACPDU on port %d\n",
1167 port->actor_port_number);
d238d458
HE		 1168
1169 /* mark ntt as false, so it will not be sent again until
1170 demanded */
1171 port->ntt = false;
1da177e4
LT		 1172 }
1173 }
1174 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
128ea6c3
BD		 1175 port->sm_tx_timer_counter =
1176 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 1177 }
1178}
1179
1180/**
1181 * ad_periodic_machine - handle a port's periodic state machine
1182 * @port: the port we're looking at
1183 *
1184 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1185 */
1186static void ad_periodic_machine(struct port *port)
1187{
1188 periodic_states_t last_state;
1189
1190 // keep current state machine state to compare later if it was changed
1191 last_state = port->sm_periodic_state;
1192
1193 // check if port was reinitialized
1194 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1195 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4
LT		 1196 ) {
1197 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1198 }
1199 // check if state machine should change state
1200 else if (port->sm_periodic_timer_counter) {
1201 // check if periodic state machine expired
1202 if (!(--port->sm_periodic_timer_counter)) {
1203 // if expired then do tx
1204 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1205 } else {
1206 // If not expired, check if there is some new timeout parameter from the partner state
1207 switch (port->sm_periodic_state) {
1208 case AD_FAST_PERIODIC:
7bfc4753
BD		 1209 if (!(port->partner_oper.port_state
1210 & AD_STATE_LACP_TIMEOUT))
1da177e4 1211 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1da177e4
LT		 1212 break;
1213 case AD_SLOW_PERIODIC:
1055c9ab 1214 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4
LT		 1215 // stop current timer
1216 port->sm_periodic_timer_counter = 0;
1217 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1218 }
1219 break;
1220 default: //to silence the compiler
1221 break;
1222 }
1223 }
1224 } else {
1225 switch (port->sm_periodic_state) {
1226 case AD_NO_PERIODIC:
1227 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1228 break;
1229 case AD_PERIODIC_TX:
7bfc4753
BD		 1230 if (!(port->partner_oper.port_state
1231 & AD_STATE_LACP_TIMEOUT))
1da177e4 1232 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
7bfc4753 1233 else
1da177e4 1234 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1da177e4
LT		 1235 break;
1236 default: //to silence the compiler
1237 break;
1238 }
1239 }
1240
1241 // check if the state machine was changed
1242 if (port->sm_periodic_state != last_state) {
a4aee5c8
JP		 1243 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1244 port->actor_port_number, last_state,
1245 port->sm_periodic_state);
1da177e4
LT		 1246 switch (port->sm_periodic_state) {
1247 case AD_NO_PERIODIC:
1248 port->sm_periodic_timer_counter = 0; // zero timer
1249 break;
1250 case AD_FAST_PERIODIC:
1251 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1252 break;
1253 case AD_SLOW_PERIODIC:
1254 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1255 break;
1256 case AD_PERIODIC_TX:
d238d458 1257 port->ntt = true;
1da177e4
LT		 1258 break;
1259 default: //to silence the compiler
1260 break;
1261 }
1262 }
1263}
1264
1265/**
1266 * ad_port_selection_logic - select aggregation groups
1267 * @port: the port we're looking at
1268 *
1269 * Select aggregation groups, and assign each port for it's aggregetor. The
1270 * selection logic is called in the inititalization (after all the handshkes),
1271 * and after every lacpdu receive (if selected is off).
1272 */
1273static void ad_port_selection_logic(struct port *port)
1274{
1275 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1276 struct port *last_port = NULL, *curr_port;
1277 int found = 0;
1278
1279 // if the port is already Selected, do nothing
7bfc4753 1280 if (port->sm_vars & AD_PORT_SELECTED)
1da177e4 1281 return;
1da177e4
LT		 1282
1283 // if the port is connected to other aggregator, detach it
1284 if (port->aggregator) {
1285 // detach the port from its former aggregator
128ea6c3
BD		 1286 temp_aggregator = port->aggregator;
1287 for (curr_port = temp_aggregator->lag_ports; curr_port;
1288 last_port = curr_port,
1289 curr_port = curr_port->next_port_in_aggregator) {
1da177e4
LT		 1290 if (curr_port == port) {
1291 temp_aggregator->num_of_ports--;
1292 if (!last_port) {// if it is the first port attached to the aggregator
128ea6c3
BD		 1293 temp_aggregator->lag_ports =
1294 port->next_port_in_aggregator;
1da177e4 1295 } else {// not the first port attached to the aggregator
128ea6c3
BD		 1296 last_port->next_port_in_aggregator =
1297 port->next_port_in_aggregator;
1da177e4
LT		 1298 }
1299
1300 // clear the port's relations to this aggregator
1301 port->aggregator = NULL;
128ea6c3
BD		 1302 port->next_port_in_aggregator = NULL;
1303 port->actor_port_aggregator_identifier = 0;
1da177e4 1304
a4aee5c8
JP		 1305 pr_debug("Port %d left LAG %d\n",
1306 port->actor_port_number,
1307 temp_aggregator->aggregator_identifier);
1da177e4 1308 // if the aggregator is empty, clear its parameters, and set it ready to be attached
7bfc4753 1309 if (!temp_aggregator->lag_ports)
1da177e4 1310 ad_clear_agg(temp_aggregator);
1da177e4
LT		 1311 break;
1312 }
1313 }
1314 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
a4aee5c8 1315 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
e5e2a8fd
JP		 1316 port->slave->dev->master->name,
1317 port->actor_port_number,
1318 port->slave->dev->name,
1319 port->aggregator->aggregator_identifier);
1da177e4
LT		 1320 }
1321 }
1322 // search on all aggregators for a suitable aggregator for this port
1323 for (aggregator = __get_first_agg(port); aggregator;
1324 aggregator = __get_next_agg(aggregator)) {
1325
1326 // keep a free aggregator for later use(if needed)
1327 if (!aggregator->lag_ports) {
7bfc4753 1328 if (!free_aggregator)
128ea6c3 1329 free_aggregator = aggregator;
1da177e4
LT		 1330 continue;
1331 }
1332 // check if current aggregator suits us
1333 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1055c9ab
HE		 1334 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1335 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1336 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1337 ) &&
1055c9ab 1338 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1da177e4
LT		 1339 !aggregator->is_individual) // but is not individual OR
1340 )
1341 ) {
1342 // attach to the founded aggregator
1343 port->aggregator = aggregator;
128ea6c3
BD		 1344 port->actor_port_aggregator_identifier =
1345 port->aggregator->aggregator_identifier;
1346 port->next_port_in_aggregator = aggregator->lag_ports;
1da177e4 1347 port->aggregator->num_of_ports++;
128ea6c3 1348 aggregator->lag_ports = port;
a4aee5c8
JP		 1349 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1350 port->actor_port_number,
1351 port->aggregator->aggregator_identifier);
1da177e4
LT		 1352
1353 // mark this port as selected
1354 port->sm_vars |= AD_PORT_SELECTED;
1355 found = 1;
1356 break;
1357 }
1358 }
1359
1360 // the port couldn't find an aggregator - attach it to a new aggregator
1361 if (!found) {
1362 if (free_aggregator) {
1363 // assign port a new aggregator
1364 port->aggregator = free_aggregator;
128ea6c3
BD		 1365 port->actor_port_aggregator_identifier =
1366 port->aggregator->aggregator_identifier;
1da177e4
LT		 1367
1368 // update the new aggregator's parameters
1369 // if port was responsed from the end-user
7bfc4753
BD		 1370 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1371 /* if port is full duplex */
1624db7b 1372 port->aggregator->is_individual = false;
7bfc4753 1373 else
1624db7b 1374 port->aggregator->is_individual = true;
1da177e4
LT		 1375
1376 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1377 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
128ea6c3
BD		 1378 port->aggregator->partner_system =
1379 port->partner_oper.system;
1380 port->aggregator->partner_system_priority =
1381 port->partner_oper.system_priority;
1055c9ab 1382 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1383 port->aggregator->receive_state = 1;
1384 port->aggregator->transmit_state = 1;
1385 port->aggregator->lag_ports = port;
1386 port->aggregator->num_of_ports++;
1387
1388 // mark this port as selected
1389 port->sm_vars |= AD_PORT_SELECTED;
1390
a4aee5c8
JP		 1391 pr_debug("Port %d joined LAG %d(new LAG)\n",
1392 port->actor_port_number,
1393 port->aggregator->aggregator_identifier);
1da177e4 1394 } else {
a4aee5c8 1395 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
4e0952c7 1396 port->slave->dev->master->name,
1da177e4
LT		 1397 port->actor_port_number, port->slave->dev->name);
1398 }
1399 }
1400 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1401 // else set ready=FALSE in all aggregator's ports
1402 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1403
fd989c83
JV		 1404 aggregator = __get_first_agg(port);
1405 ad_agg_selection_logic(aggregator);
1406}
1407
1408/*
1409 * Decide if "agg" is a better choice for the new active aggregator that
1410 * the current best, according to the ad_select policy.
1411 */
1412static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1413 struct aggregator *curr)
1414{
1415 /*
1416 * 0. If no best, select current.
1417 *
1418 * 1. If the current agg is not individual, and the best is
1419 * individual, select current.
1420 *
1421 * 2. If current agg is individual and the best is not, keep best.
1422 *
1423 * 3. Therefore, current and best are both individual or both not
1424 * individual, so:
1425 *
1426 * 3a. If current agg partner replied, and best agg partner did not,
1427 * select current.
1428 *
1429 * 3b. If current agg partner did not reply and best agg partner
1430 * did reply, keep best.
1431 *
1432 * 4. Therefore, current and best both have partner replies or
1433 * both do not, so perform selection policy:
1434 *
1435 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1436 * select by bandwidth.
1437 *
1438 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1439 */
1440 if (!best)
1441 return curr;
1442
1443 if (!curr->is_individual && best->is_individual)
1444 return curr;
1445
1446 if (curr->is_individual && !best->is_individual)
1447 return best;
1448
1449 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1450 return curr;
1451
1452 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1453 return best;
1454
1455 switch (__get_agg_selection_mode(curr->lag_ports)) {
1456 case BOND_AD_COUNT:
1457 if (curr->num_of_ports > best->num_of_ports)
1458 return curr;
1459
1460 if (curr->num_of_ports < best->num_of_ports)
1461 return best;
1462
1463 /*FALLTHROUGH*/
1464 case BOND_AD_STABLE:
1465 case BOND_AD_BANDWIDTH:
1466 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1467 return curr;
1468
1469 break;
1470
1471 default:
a4aee5c8 1472 pr_warning("%s: Impossible agg select mode %d\n",
e5e2a8fd
JP		 1473 curr->slave->dev->master->name,
1474 __get_agg_selection_mode(curr->lag_ports));
fd989c83 1475 break;
1da177e4 1476 }
fd989c83
JV		 1477
1478 return best;
1da177e4
LT		 1479}
1480
4cd6fe1c
SH		 1481static int agg_device_up(const struct aggregator *agg)
1482{
2430af8b
JB		 1483 struct port *port = agg->lag_ports;
1484 if (!port)
1485 return 0;
1486 return (netif_running(port->slave->dev) &&
1487 netif_carrier_ok(port->slave->dev));
4cd6fe1c
SH		 1488}
1489
1da177e4
LT		 1490/**
1491 * ad_agg_selection_logic - select an aggregation group for a team
1492 * @aggregator: the aggregator we're looking at
1493 *
1494 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1495 *
1496 * The logic of this function is to select the aggregator according to
1497 * the ad_select policy:
1498 *
1499 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1500 * it, and to reselect the active aggregator only if the previous
1501 * aggregator has no more ports related to it.
1502 *
1503 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1504 * bandwidth, and reselect whenever a link state change takes place or the
1505 * set of slaves in the bond changes.
1506 *
1507 * BOND_AD_COUNT: select the aggregator with largest number of ports
1508 * (slaves), and reselect whenever a link state change takes place or the
1509 * set of slaves in the bond changes.
1da177e4
LT		 1510 *
1511 * FIXME: this function MUST be called with the first agg in the bond, or
1512 * __get_active_agg() won't work correctly. This function should be better
1513 * called with the bond itself, and retrieve the first agg from it.
1514 */
fd989c83 1515static void ad_agg_selection_logic(struct aggregator *agg)
1da177e4 1516{
fd989c83 1517 struct aggregator *best, *active, *origin;
1da177e4 1518 struct port *port;
1da177e4 1519
fd989c83 1520 origin = agg;
fd989c83 1521 active = __get_active_agg(agg);
4cd6fe1c 1522 best = (active && agg_device_up(active)) ? active : NULL;
1da177e4 1523
1da177e4 1524 do {
fd989c83
JV		 1525 agg->is_active = 0;
1526
4cd6fe1c 1527 if (agg->num_of_ports && agg_device_up(agg))
fd989c83
JV		 1528 best = ad_agg_selection_test(best, agg);
1529
1530 } while ((agg = __get_next_agg(agg)));
1531
1532 if (best &&
1533 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1534 /*
1535 * For the STABLE policy, don't replace the old active
1536 * aggregator if it's still active (it has an answering
1537 * partner) or if both the best and active don't have an
1538 * answering partner.
1539 */
1540 if (active && active->lag_ports &&
1541 active->lag_ports->is_enabled &&
1542 (__agg_has_partner(active) ||
1543 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1544 if (!(!active->actor_oper_aggregator_key &&
1545 best->actor_oper_aggregator_key)) {
1546 best = NULL;
1547 active->is_active = 1;
1da177e4
LT		 1548 }
1549 }
fd989c83 1550 }
1da177e4 1551
fd989c83
JV		 1552 if (best && (best == active)) {
1553 best = NULL;
1554 active->is_active = 1;
1da177e4
LT		 1555 }
1556
1557 // if there is new best aggregator, activate it
fd989c83 1558 if (best) {
5a03cdb7 1559 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1560 best->aggregator_identifier, best->num_of_ports,
1561 best->actor_oper_aggregator_key,
1562 best->partner_oper_aggregator_key,
1563 best->is_individual, best->is_active);
5a03cdb7 1564 pr_debug("best ports %p slave %p %s\n",
a4aee5c8
JP		 1565 best->lag_ports, best->slave,
1566 best->slave ? best->slave->dev->name : "NULL");
fd989c83
JV		 1567
1568 for (agg = __get_first_agg(best->lag_ports); agg;
1569 agg = __get_next_agg(agg)) {
1570
5a03cdb7 1571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1572 agg->aggregator_identifier, agg->num_of_ports,
1573 agg->actor_oper_aggregator_key,
1574 agg->partner_oper_aggregator_key,
1575 agg->is_individual, agg->is_active);
1da177e4
LT		 1576 }
1577
1578 // check if any partner replys
fd989c83 1579 if (best->is_individual) {
a4aee5c8 1580 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
c99a3d2e 1581 best->slave ? best->slave->dev->master->name : "NULL");
1da177e4
LT		 1582 }
1583
fd989c83 1584 best->is_active = 1;
5a03cdb7 1585 pr_debug("LAG %d chosen as the active LAG\n",
a4aee5c8 1586 best->aggregator_identifier);
5a03cdb7 1587 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1588 best->aggregator_identifier, best->num_of_ports,
1589 best->actor_oper_aggregator_key,
1590 best->partner_oper_aggregator_key,
1591 best->is_individual, best->is_active);
1da177e4
LT		 1592
1593 // disable the ports that were related to the former active_aggregator
fd989c83
JV		 1594 if (active) {
1595 for (port = active->lag_ports; port;
1596 port = port->next_port_in_aggregator) {
1da177e4
LT		 1597 __disable_port(port);
1598 }
1599 }
1600 }
1601
fd989c83
JV		 1602 /*
1603 * if the selected aggregator is of join individuals
1604 * (partner_system is NULL), enable their ports
1605 */
1606 active = __get_active_agg(origin);
1da177e4 1607
fd989c83
JV		 1608 if (active) {
1609 if (!__agg_has_partner(active)) {
1610 for (port = active->lag_ports; port;
1611 port = port->next_port_in_aggregator) {
1da177e4
LT		 1612 __enable_port(port);
1613 }
1614 }
1615 }
fd989c83
JV		 1616
1617 if (origin->slave) {
1618 struct bonding *bond;
1619
1620 bond = bond_get_bond_by_slave(origin->slave);
1621 if (bond)
1622 bond_3ad_set_carrier(bond);
1623 }
1da177e4
LT		 1624}
1625
1626/**
1627 * ad_clear_agg - clear a given aggregator's parameters
1628 * @aggregator: the aggregator we're looking at
1629 *
1630 */
1631static void ad_clear_agg(struct aggregator *aggregator)
1632{
1633 if (aggregator) {
1624db7b 1634 aggregator->is_individual = false;
1da177e4
LT		 1635 aggregator->actor_admin_aggregator_key = 0;
1636 aggregator->actor_oper_aggregator_key = 0;
1637 aggregator->partner_system = null_mac_addr;
1638 aggregator->partner_system_priority = 0;
1639 aggregator->partner_oper_aggregator_key = 0;
1640 aggregator->receive_state = 0;
1641 aggregator->transmit_state = 0;
1642 aggregator->lag_ports = NULL;
1643 aggregator->is_active = 0;
1644 aggregator->num_of_ports = 0;
a4aee5c8
JP		 1645 pr_debug("LAG %d was cleared\n",
1646 aggregator->aggregator_identifier);
1da177e4
LT		 1647 }
1648}
1649
1650/**
1651 * ad_initialize_agg - initialize a given aggregator's parameters
1652 * @aggregator: the aggregator we're looking at
1653 *
1654 */
1655static void ad_initialize_agg(struct aggregator *aggregator)
1656{
1657 if (aggregator) {
1658 ad_clear_agg(aggregator);
1659
1660 aggregator->aggregator_mac_address = null_mac_addr;
1661 aggregator->aggregator_identifier = 0;
1662 aggregator->slave = NULL;
1663 }
1664}
1665
1666/**
1667 * ad_initialize_port - initialize a given port's parameters
1668 * @aggregator: the aggregator we're looking at
1669 * @lacp_fast: boolean. whether fast periodic should be used
1670 *
1671 */
1672static void ad_initialize_port(struct port *port, int lacp_fast)
1673{
c7e703d0
HE		 1674 static const struct port_params tmpl = {
1675 .system_priority = 0xffff,
1676 .key = 1,
1677 .port_number = 1,
1678 .port_priority = 0xff,
1679 .port_state = 1,
1680 };
7addeef6
HE		 1681 static const struct lacpdu lacpdu = {
1682 .subtype = 0x01,
1683 .version_number = 0x01,
1684 .tlv_type_actor_info = 0x01,
1685 .actor_information_length = 0x14,
1686 .tlv_type_partner_info = 0x02,
1687 .partner_information_length = 0x14,
1688 .tlv_type_collector_info = 0x03,
1689 .collector_information_length = 0x10,
1690 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1691 };
c7e703d0 1692
1da177e4
LT		 1693 if (port) {
1694 port->actor_port_number = 1;
1695 port->actor_port_priority = 0xff;
1696 port->actor_system = null_mac_addr;
1697 port->actor_system_priority = 0xffff;
1698 port->actor_port_aggregator_identifier = 0;
d238d458 1699 port->ntt = false;
1da177e4
LT		 1700 port->actor_admin_port_key = 1;
1701 port->actor_oper_port_key = 1;
1702 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1703 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1704
7bfc4753 1705 if (lacp_fast)
1da177e4 1706 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1da177e4 1707
c7e703d0
HE		 1708 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1709 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1710
f48127b6 1711 port->is_enabled = true;
1da177e4
LT		 1712 // ****** private parameters ******
1713 port->sm_vars = 0x3;
1714 port->sm_rx_state = 0;
1715 port->sm_rx_timer_counter = 0;
1716 port->sm_periodic_state = 0;
1717 port->sm_periodic_timer_counter = 0;
1718 port->sm_mux_state = 0;
1719 port->sm_mux_timer_counter = 0;
1720 port->sm_tx_state = 0;
1721 port->sm_tx_timer_counter = 0;
1722 port->slave = NULL;
1723 port->aggregator = NULL;
1724 port->next_port_in_aggregator = NULL;
1725 port->transaction_id = 0;
1726
7addeef6 1727 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1da177e4
LT		 1728 }
1729}
1730
1731/**
1732 * ad_enable_collecting_distributing - enable a port's transmit/receive
1733 * @port: the port we're looking at
1734 *
1735 * Enable @port if it's in an active aggregator
1736 */
1737static void ad_enable_collecting_distributing(struct port *port)
1738{
1739 if (port->aggregator->is_active) {
a4aee5c8
JP		 1740 pr_debug("Enabling port %d(LAG %d)\n",
1741 port->actor_port_number,
1742 port->aggregator->aggregator_identifier);
1da177e4
LT		 1743 __enable_port(port);
1744 }
1745}
1746
1747/**
1748 * ad_disable_collecting_distributing - disable a port's transmit/receive
1749 * @port: the port we're looking at
1750 *
1751 */
1752static void ad_disable_collecting_distributing(struct port *port)
1753{
1754 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
a4aee5c8
JP		 1755 pr_debug("Disabling port %d(LAG %d)\n",
1756 port->actor_port_number,
1757 port->aggregator->aggregator_identifier);
1da177e4
LT		 1758 __disable_port(port);
1759 }
1760}
1761
1762#if 0
1763/**
1764 * ad_marker_info_send - send a marker information frame
1765 * @port: the port we're looking at
1766 *
1767 * This function does nothing since we decided not to implement send and handle
1768 * response for marker PDU's, in this stage, but only to respond to marker
1769 * information.
1770 */
1771static void ad_marker_info_send(struct port *port)
1772{
1c3f0b8e 1773 struct bond_marker marker;
1da177e4
LT		 1774 u16 index;
1775
1776 // fill the marker PDU with the appropriate values
1777 marker.subtype = 0x02;
1778 marker.version_number = 0x01;
1779 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1780 marker.marker_length = 0x16;
1781 // convert requester_port to Big Endian
1782 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1783 marker.requester_system = port->actor_system;
1784 // convert requester_port(u32) to Big Endian
128ea6c3
BD		 1785 marker.requester_transaction_id =
1786 (((++port->transaction_id & 0xFF) << 24)
1787 | ((port->transaction_id & 0xFF00) << 8)
1788 | ((port->transaction_id & 0xFF0000) >> 8)
1789 | ((port->transaction_id & 0xFF000000) >> 24));
1da177e4
LT		 1790 marker.pad = 0;
1791 marker.tlv_type_terminator = 0x00;
1792 marker.terminator_length = 0x00;
128ea6c3
BD		 1793 for (index = 0; index < 90; index++)
1794 marker.reserved_90[index] = 0;
1da177e4
LT		 1795
1796 // send the marker information
1797 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1798 pr_debug("Sent Marker Information on port %d\n",
1799 port->actor_port_number);
1da177e4
LT		 1800 }
1801}
1802#endif
1803
1804/**
1805 * ad_marker_info_received - handle receive of a Marker information frame
1806 * @marker_info: Marker info received
1807 * @port: the port we're looking at
1808 *
1809 */
1c3f0b8e
MD		 1810static void ad_marker_info_received(struct bond_marker *marker_info,
1811 struct port *port)
1da177e4 1812{
1c3f0b8e 1813 struct bond_marker marker;
1da177e4
LT		 1814
1815 // copy the received marker data to the response marker
1816 //marker = *marker_info;
1c3f0b8e 1817 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1da177e4 1818 // change the marker subtype to marker response
128ea6c3 1819 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1da177e4
LT		 1820 // send the marker response
1821
1822 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1823 pr_debug("Sent Marker Response on port %d\n",
1824 port->actor_port_number);
1da177e4
LT		 1825 }
1826}
1827
1828/**
1829 * ad_marker_response_received - handle receive of a marker response frame
1830 * @marker: marker PDU received
1831 * @port: the port we're looking at
1832 *
1833 * This function does nothing since we decided not to implement send and handle
1834 * response for marker PDU's, in this stage, but only to respond to marker
1835 * information.
1836 */
1c3f0b8e
MD		 1837static void ad_marker_response_received(struct bond_marker *marker,
1838 struct port *port)
1da177e4 1839{
128ea6c3
BD		 1840 marker = NULL; /* just to satisfy the compiler */
1841 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 1842 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1843}
1844
1da177e4
LT		 1845//////////////////////////////////////////////////////////////////////////////////////
1846// ================= AD exported functions to the main bonding code ==================
1847//////////////////////////////////////////////////////////////////////////////////////
1848
1849// Check aggregators status in team every T seconds
1850#define AD_AGGREGATOR_SELECTION_TIMER 8
1851
fd989c83
JV		 1852/*
1853 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1854 *
1855 * Set the aggregation selection timer, to initiate an agg selection in
1856 * the very near future. Called during first initialization, and during
1857 * any down to up transitions of the bond.
1858 */
1859void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1860{
1861 BOND_AD_INFO(bond).agg_select_timer = timeout;
fd989c83
JV		 1862}
1863
1da177e4
LT		 1864static u16 aggregator_identifier;
1865
1866/**
1867 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1868 * @bond: bonding struct to work on
1869 * @tick_resolution: tick duration (millisecond resolution)
1da177e4
LT		 1870 *
1871 * Can be called only after the mac address of the bond is set.
1872 */
56d00c67 1873void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
3a6d54c5 1874{
1da177e4 1875 // check that the bond is not initialized yet
3a6d54c5
JP		 1876 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1877 bond->dev->dev_addr)) {
1da177e4
LT		 1878
1879 aggregator_identifier = 0;
1880
1da177e4
LT		 1881 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1882 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1883
1884 // initialize how many times this module is called in one second(should be about every 100ms)
1885 ad_ticks_per_sec = tick_resolution;
1886
fd989c83
JV		 1887 bond_3ad_initiate_agg_selection(bond,
1888 AD_AGGREGATOR_SELECTION_TIMER *
1889 ad_ticks_per_sec);
1da177e4
LT		 1890 }
1891}
1892
1893/**
1894 * bond_3ad_bind_slave - initialize a slave's port
1895 * @slave: slave struct to work on
1896 *
1897 * Returns: 0 on success
1898 * < 0 on error
1899 */
1900int bond_3ad_bind_slave(struct slave *slave)
1901{
1902 struct bonding *bond = bond_get_bond_by_slave(slave);
56d00c67 1903 int lacp_fast = bond->params.lacp_fast;
1da177e4
LT		 1904 struct port *port;
1905 struct aggregator *aggregator;
1906
1907 if (bond == NULL) {
a4aee5c8 1908 pr_err("%s: The slave %s is not attached to its bond\n",
4e0952c7 1909 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 1910 return -1;
1911 }
1912
b595076a 1913 //check that the slave has not been initialized yet.
1da177e4
LT		 1914 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1915
1916 // port initialization
1917 port = &(SLAVE_AD_INFO(slave).port);
1918
56d00c67 1919 ad_initialize_port(port, lacp_fast);
1da177e4
LT		 1920
1921 port->slave = slave;
1922 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1923 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1924 // ------------------------------------------------------------
1925 // Port key : | User key | Speed |Duplex|
1926 // ------------------------------------------------------------
1927 // 16 6 1 0
1928 port->actor_admin_port_key = 0; // initialize this parameter
1929 port->actor_admin_port_key |= __get_duplex(port);
1930 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1931 port->actor_oper_port_key = port->actor_admin_port_key;
1932 // if the port is not full duplex, then the port should be not lacp Enabled
7bfc4753 1933 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1934 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1da177e4
LT		 1935 // actor system is the bond's system
1936 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1937 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1938 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1939 port->aggregator = NULL;
1940 port->next_port_in_aggregator = NULL;
1941
1942 __disable_port(port);
1943 __initialize_port_locks(port);
1944
1945
1946 // aggregator initialization
1947 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1948
1949 ad_initialize_agg(aggregator);
1950
1951 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1952 aggregator->aggregator_identifier = (++aggregator_identifier);
1953 aggregator->slave = slave;
1954 aggregator->is_active = 0;
1955 aggregator->num_of_ports = 0;
1956 }
1957
1958 return 0;
1959}
1960
1961/**
1962 * bond_3ad_unbind_slave - deinitialize a slave's port
1963 * @slave: slave struct to work on
1964 *
1965 * Search for the aggregator that is related to this port, remove the
1966 * aggregator and assign another aggregator for other port related to it
1967 * (if any), and remove the port.
1968 */
1969void bond_3ad_unbind_slave(struct slave *slave)
1970{
1971 struct port *port, *prev_port, *temp_port;
1972 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1973 int select_new_active_agg = 0;
a361c83c 1974
1da177e4
LT		 1975 // find the aggregator related to this slave
1976 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1977
1978 // find the port related to this slave
1979 port = &(SLAVE_AD_INFO(slave).port);
1980
1981 // if slave is null, the whole port is not initialized
1982 if (!port->slave) {
a4aee5c8 1983 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
e5e2a8fd 1984 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 1985 return;
1986 }
1987
a4aee5c8
JP		 1988 pr_debug("Unbinding Link Aggregation Group %d\n",
1989 aggregator->aggregator_identifier);
1da177e4
LT		 1990
1991 /* Tell the partner that this port is not suitable for aggregation */
1992 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1993 __update_lacpdu_from_port(port);
1994 ad_lacpdu_send(port);
1995
1996 // check if this aggregator is occupied
1997 if (aggregator->lag_ports) {
1998 // check if there are other ports related to this aggregator except
1999 // the port related to this slave(thats ensure us that there is a
2000 // reason to search for new aggregator, and that we will find one
2001 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2002 // find new aggregator for the related port(s)
2003 new_aggregator = __get_first_agg(port);
2004 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
fd589a8f 2005 // if the new aggregator is empty, or it is connected to our port only
7bfc4753
BD		 2006 if (!new_aggregator->lag_ports
2007 || ((new_aggregator->lag_ports == port)
2008 && !new_aggregator->lag_ports->next_port_in_aggregator))
1da177e4 2009 break;
1da177e4
LT		 2010 }
2011 // if new aggregator found, copy the aggregator's parameters
2012 // and connect the related lag_ports to the new aggregator
2013 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
a4aee5c8
JP		 2014 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
2015 aggregator->aggregator_identifier,
2016 new_aggregator->aggregator_identifier);
1da177e4
LT		 2017
2018 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
a4aee5c8 2019 pr_info("%s: Removing an active aggregator\n",
e5e2a8fd 2020 aggregator->slave->dev->master->name);
1da177e4
LT		 2021 // select new active aggregator
2022 select_new_active_agg = 1;
2023 }
2024
2025 new_aggregator->is_individual = aggregator->is_individual;
2026 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2027 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2028 new_aggregator->partner_system = aggregator->partner_system;
2029 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2030 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2031 new_aggregator->receive_state = aggregator->receive_state;
2032 new_aggregator->transmit_state = aggregator->transmit_state;
2033 new_aggregator->lag_ports = aggregator->lag_ports;
2034 new_aggregator->is_active = aggregator->is_active;
2035 new_aggregator->num_of_ports = aggregator->num_of_ports;
2036
2037 // update the information that is written on the ports about the aggregator
128ea6c3
BD		 2038 for (temp_port = aggregator->lag_ports; temp_port;
2039 temp_port = temp_port->next_port_in_aggregator) {
2040 temp_port->aggregator = new_aggregator;
1da177e4
LT		 2041 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2042 }
2043
2044 // clear the aggregator
2045 ad_clear_agg(aggregator);
a361c83c 2046
7bfc4753 2047 if (select_new_active_agg)
1da177e4 2048 ad_agg_selection_logic(__get_first_agg(port));
1da177e4 2049 } else {
a4aee5c8 2050 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
e5e2a8fd 2051 slave->dev->master->name);
1da177e4
LT		 2052 }
2053 } else { // in case that the only port related to this aggregator is the one we want to remove
2054 select_new_active_agg = aggregator->is_active;
2055 // clear the aggregator
2056 ad_clear_agg(aggregator);
2057 if (select_new_active_agg) {
a4aee5c8 2058 pr_info("%s: Removing an active aggregator\n",
e5e2a8fd 2059 slave->dev->master->name);
1da177e4
LT		 2060 // select new active aggregator
2061 ad_agg_selection_logic(__get_first_agg(port));
2062 }
2063 }
2064 }
2065
5a03cdb7 2066 pr_debug("Unbinding port %d\n", port->actor_port_number);
1da177e4
LT		 2067 // find the aggregator that this port is connected to
2068 temp_aggregator = __get_first_agg(port);
2069 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2070 prev_port = NULL;
2071 // search the port in the aggregator's related ports
128ea6c3
BD		 2072 for (temp_port = temp_aggregator->lag_ports; temp_port;
2073 prev_port = temp_port,
2074 temp_port = temp_port->next_port_in_aggregator) {
1da177e4 2075 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
7bfc4753 2076 if (prev_port)
1da177e4 2077 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
7bfc4753 2078 else
1da177e4 2079 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
1da177e4 2080 temp_aggregator->num_of_ports--;
128ea6c3 2081 if (temp_aggregator->num_of_ports == 0) {
1da177e4
LT		 2082 select_new_active_agg = temp_aggregator->is_active;
2083 // clear the aggregator
2084 ad_clear_agg(temp_aggregator);
2085 if (select_new_active_agg) {
a4aee5c8 2086 pr_info("%s: Removing an active aggregator\n",
e5e2a8fd 2087 slave->dev->master->name);
1da177e4
LT		 2088 // select new active aggregator
2089 ad_agg_selection_logic(__get_first_agg(port));
2090 }
2091 }
2092 break;
2093 }
2094 }
2095 }
128ea6c3 2096 port->slave = NULL;
1da177e4
LT		 2097}
2098
2099/**
2100 * bond_3ad_state_machine_handler - handle state machines timeout
2101 * @bond: bonding struct to work on
2102 *
2103 * The state machine handling concept in this module is to check every tick
2104 * which state machine should operate any function. The execution order is
2105 * round robin, so when we have an interaction between state machines, the
2106 * reply of one to each other might be delayed until next tick.
2107 *
2108 * This function also complete the initialization when the agg_select_timer
2109 * times out, and it selects an aggregator for the ports that are yet not
2110 * related to any aggregator, and selects the active aggregator for a bond.
2111 */
1b76b316 2112void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2113{
1b76b316
JV		 2114 struct bonding *bond = container_of(work, struct bonding,
2115 ad_work.work);
1da177e4
LT		 2116 struct port *port;
2117 struct aggregator *aggregator;
2118
2119 read_lock(&bond->lock);
2120
7bfc4753 2121 if (bond->kill_timers)
1da177e4 2122 goto out;
1da177e4
LT		 2123
2124 //check if there are any slaves
7bfc4753 2125 if (bond->slave_cnt == 0)
1da177e4 2126 goto re_arm;
1da177e4
LT		 2127
2128 // check if agg_select_timer timer after initialize is timed out
2129 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2130 // select the active aggregator for the bond
2131 if ((port = __get_first_port(bond))) {
2132 if (!port->slave) {
a4aee5c8
JP		 2133 pr_warning("%s: Warning: bond's first port is uninitialized\n",
2134 bond->dev->name);
1da177e4
LT		 2135 goto re_arm;
2136 }
2137
2138 aggregator = __get_first_agg(port);
2139 ad_agg_selection_logic(aggregator);
2140 }
f0c76d61 2141 bond_3ad_set_carrier(bond);
1da177e4
LT		 2142 }
2143
2144 // for each port run the state machines
2145 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2146 if (!port->slave) {
a4aee5c8
JP		 2147 pr_warning("%s: Warning: Found an uninitialized port\n",
2148 bond->dev->name);
1da177e4
LT		 2149 goto re_arm;
2150 }
2151
16d79d7d
NC		 2152 /* Lock around state machines to protect data accessed
2153 * by all (e.g., port->sm_vars). ad_rx_machine may run
2154 * concurrently due to incoming LACPDU.
2155 */
9ac3524a 2156 __get_state_machine_lock(port);
16d79d7d 2157
1da177e4
LT		 2158 ad_rx_machine(NULL, port);
2159 ad_periodic_machine(port);
2160 ad_port_selection_logic(port);
2161 ad_mux_machine(port);
2162 ad_tx_machine(port);
2163
2164 // turn off the BEGIN bit, since we already handled it
7bfc4753 2165 if (port->sm_vars & AD_PORT_BEGIN)
1da177e4 2166 port->sm_vars &= ~AD_PORT_BEGIN;
16d79d7d 2167
9ac3524a 2168 __release_state_machine_lock(port);
1da177e4
LT		 2169 }
2170
2171re_arm:
1b76b316 2172 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1da177e4
LT		 2173out:
2174 read_unlock(&bond->lock);
2175}
2176
2177/**
2178 * bond_3ad_rx_indication - handle a received frame
2179 * @lacpdu: received lacpdu
2180 * @slave: slave struct to work on
2181 * @length: length of the data received
2182 *
2183 * It is assumed that frames that were sent on this NIC don't returned as new
2184 * received frames (loopback). Since only the payload is given to this
2185 * function, it check for loopback.
2186 */
2187static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2188{
2189 struct port *port;
2190
2191 if (length >= sizeof(struct lacpdu)) {
2192
2193 port = &(SLAVE_AD_INFO(slave).port);
2194
2195 if (!port->slave) {
a4aee5c8 2196 pr_warning("%s: Warning: port of slave %s is uninitialized\n",
e5e2a8fd 2197 slave->dev->name, slave->dev->master->name);
1da177e4
LT		 2198 return;
2199 }
2200
2201 switch (lacpdu->subtype) {
2202 case AD_TYPE_LACPDU:
a4aee5c8
JP		 2203 pr_debug("Received LACPDU on port %d\n",
2204 port->actor_port_number);
16d79d7d 2205 /* Protect against concurrent state machines */
9ac3524a 2206 __get_state_machine_lock(port);
1da177e4 2207 ad_rx_machine(lacpdu, port);
9ac3524a 2208 __release_state_machine_lock(port);
1da177e4
LT		 2209 break;
2210
2211 case AD_TYPE_MARKER:
2212 // No need to convert fields to Little Endian since we don't use the marker's fields.
2213
1c3f0b8e 2214 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2215 case AD_MARKER_INFORMATION_SUBTYPE:
a4aee5c8
JP		 2216 pr_debug("Received Marker Information on port %d\n",
2217 port->actor_port_number);
1c3f0b8e 2218 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2219 break;
2220
2221 case AD_MARKER_RESPONSE_SUBTYPE:
a4aee5c8
JP		 2222 pr_debug("Received Marker Response on port %d\n",
2223 port->actor_port_number);
1c3f0b8e 2224 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2225 break;
2226
2227 default:
a4aee5c8
JP		 2228 pr_debug("Received an unknown Marker subtype on slot %d\n",
2229 port->actor_port_number);
1da177e4
LT		 2230 }
2231 }
2232 }
2233}
2234
2235/**
2236 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2237 * @slave: slave struct to work on
2238 *
2239 * Handle reselection of aggregator (if needed) for this port.
2240 */
2241void bond_3ad_adapter_speed_changed(struct slave *slave)
2242{
2243 struct port *port;
2244
2245 port = &(SLAVE_AD_INFO(slave).port);
2246
2247 // if slave is null, the whole port is not initialized
2248 if (!port->slave) {
a4aee5c8 2249 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
e5e2a8fd 2250 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2251 return;
2252 }
2253
2254 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2255 port->actor_oper_port_key = port->actor_admin_port_key |=
2256 (__get_link_speed(port) << 1);
5a03cdb7 2257 pr_debug("Port %d changed speed\n", port->actor_port_number);
1da177e4
LT		 2258 // there is no need to reselect a new aggregator, just signal the
2259 // state machines to reinitialize
2260 port->sm_vars |= AD_PORT_BEGIN;
2261}
2262
2263/**
2264 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2265 * @slave: slave struct to work on
2266 *
2267 * Handle reselection of aggregator (if needed) for this port.
2268 */
2269void bond_3ad_adapter_duplex_changed(struct slave *slave)
2270{
2271 struct port *port;
2272
128ea6c3 2273 port = &(SLAVE_AD_INFO(slave).port);
1da177e4
LT		 2274
2275 // if slave is null, the whole port is not initialized
2276 if (!port->slave) {
a4aee5c8 2277 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
e5e2a8fd 2278 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2279 return;
2280 }
2281
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);
5a03cdb7 2285 pr_debug("Port %d changed duplex\n", port->actor_port_number);
1da177e4
LT		 2286 // there is no need to reselect a new aggregator, just signal the
2287 // state machines to reinitialize
2288 port->sm_vars |= AD_PORT_BEGIN;
2289}
2290
2291/**
2292 * bond_3ad_handle_link_change - handle a slave's link status change indication
2293 * @slave: slave struct to work on
2294 * @status: whether the link is now up or down
2295 *
2296 * Handle reselection of aggregator (if needed) for this port.
2297 */
2298void bond_3ad_handle_link_change(struct slave *slave, char link)
2299{
2300 struct port *port;
2301
2302 port = &(SLAVE_AD_INFO(slave).port);
2303
2304 // if slave is null, the whole port is not initialized
2305 if (!port->slave) {
a4aee5c8 2306 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
e5e2a8fd 2307 slave->dev->master->name, slave->dev->name);
1da177e4
LT		 2308 return;
2309 }
2310
2311 // 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)
2312 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2313 if (link == BOND_LINK_UP) {
f48127b6 2314 port->is_enabled = true;
1da177e4 2315 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2316 port->actor_oper_port_key = port->actor_admin_port_key |=
2317 __get_duplex(port);
1da177e4 2318 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2319 port->actor_oper_port_key = port->actor_admin_port_key |=
2320 (__get_link_speed(port) << 1);
1da177e4
LT		 2321 } else {
2322 /* link has failed */
f48127b6 2323 port->is_enabled = false;
1da177e4 2324 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2325 port->actor_oper_port_key = (port->actor_admin_port_key &=
2326 ~AD_SPEED_KEY_BITS);
1da177e4
LT		 2327 }
2328 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2329 // there is no need to reselect a new aggregator, just signal the
2330 // state machines to reinitialize
2331 port->sm_vars |= AD_PORT_BEGIN;
2332}
2333
ff59c456 2334/*
a361c83c 2335 * set link state for bonding master: if we have an active
ff59c456
JV		 2336 * aggregator, we're up, if not, we're down. Presumes that we cannot
2337 * have an active aggregator if there are no slaves with link up.
2338 *
031ae4de
JV		 2339 * This behavior complies with IEEE 802.3 section 43.3.9.
2340 *
ff59c456
JV		 2341 * Called by bond_set_carrier(). Return zero if carrier state does not
2342 * change, nonzero if it does.
2343 */
2344int bond_3ad_set_carrier(struct bonding *bond)
2345{
031ae4de 2346 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
ff59c456
JV		 2347 if (!netif_carrier_ok(bond->dev)) {
2348 netif_carrier_on(bond->dev);
2349 return 1;
2350 }
2351 return 0;
2352 }
2353
2354 if (netif_carrier_ok(bond->dev)) {
2355 netif_carrier_off(bond->dev);
2356 return 1;
2357 }
2358 return 0;
2359}
2360
1da177e4
LT		 2361/**
2362 * bond_3ad_get_active_agg_info - get information of the active aggregator
2363 * @bond: bonding struct to work on
2364 * @ad_info: ad_info struct to fill with the bond's info
2365 *
2366 * Returns: 0 on success
2367 * < 0 on error
2368 */
2369int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2370{
2371 struct aggregator *aggregator = NULL;
2372 struct port *port;
2373
2374 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2375 if (port->aggregator && port->aggregator->is_active) {
2376 aggregator = port->aggregator;
2377 break;
2378 }
2379 }
2380
2381 if (aggregator) {
2382 ad_info->aggregator_id = aggregator->aggregator_identifier;
2383 ad_info->ports = aggregator->num_of_ports;
2384 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2385 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2386 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2387 return 0;
2388 }
2389
2390 return -1;
2391}
2392
2393int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2394{
2395 struct slave *slave, *start_at;
454d7c9b 2396 struct bonding *bond = netdev_priv(dev);
1da177e4
LT		 2397 int slave_agg_no;
2398 int slaves_in_agg;
2399 int agg_id;
2400 int i;
2401 struct ad_info ad_info;
2402 int res = 1;
2403
1da177e4 2404 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
a4aee5c8
JP		 2405 pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n",
2406 dev->name);
1da177e4
LT		 2407 goto out;
2408 }
2409
2410 slaves_in_agg = ad_info.ports;
2411 agg_id = ad_info.aggregator_id;
2412
2413 if (slaves_in_agg == 0) {
2414 /*the aggregator is empty*/
a4aee5c8 2415 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
1da177e4
LT		 2416 goto out;
2417 }
2418
a361c83c 2419 slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
1da177e4
LT		 2420
2421 bond_for_each_slave(bond, slave, i) {
2422 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2423
2424 if (agg && (agg->aggregator_identifier == agg_id)) {
2425 slave_agg_no--;
7bfc4753 2426 if (slave_agg_no < 0)
1da177e4 2427 break;
1da177e4
LT		 2428 }
2429 }
2430
2431 if (slave_agg_no >= 0) {
a4aee5c8
JP		 2432 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2433 dev->name, agg_id);
1da177e4
LT		 2434 goto out;
2435 }
2436
2437 start_at = slave;
2438
2439 bond_for_each_slave_from(bond, slave, i, start_at) {
2440 int slave_agg_id = 0;
2441 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2442
7bfc4753 2443 if (agg)
1da177e4 2444 slave_agg_id = agg->aggregator_identifier;
1da177e4
LT		 2445
2446 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2447 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2448 break;
2449 }
2450 }
2451
2452out:
2453 if (res) {
2454 /* no suitable interface, frame not sent */
2455 dev_kfree_skb(skb);
2456 }
0693e88e 2457
ec634fe3 2458 return NETDEV_TX_OK;
1da177e4
LT		 2459}
2460
3aba891d
JP		 2461void bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
2462 struct slave *slave)
1da177e4 2463{
3aba891d
JP		 2464 if (skb->protocol != PKT_TYPE_LACPDU)
2465 return;
b3053251 2466
ab12811c 2467 if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
3aba891d 2468 return;
ab12811c 2469
1da177e4 2470 read_lock(&bond->lock);
1da177e4 2471 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
1da177e4 2472 read_unlock(&bond->lock);
1da177e4 2473}
ba824a8b
PP		 2474
2475/*
2476 * When modify lacp_rate parameter via sysfs,
2477 * update actor_oper_port_state of each port.
2478 *
2479 * Hold slave->state_machine_lock,
2480 * so we can modify port->actor_oper_port_state,
2481 * no matter bond is up or down.
2482 */
2483void bond_3ad_update_lacp_rate(struct bonding *bond)
2484{
2485 int i;
2486 struct slave *slave;
2487 struct port *port = NULL;
2488 int lacp_fast;
2489
2490 read_lock(&bond->lock);
2491 lacp_fast = bond->params.lacp_fast;
2492
2493 bond_for_each_slave(bond, slave, i) {
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 }
2502
2503 read_unlock(&bond->lock);
2504}
Linux kernel - Deliverables
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