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bonding: protect port for bond_3ad_adapter_duplex_changed()
[deliverable/linux.git] / drivers / net / bonding / bond_3ad.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
7 * any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
1da177e4
LT		 21 */
22
a4aee5c8
JP		 23#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
1da177e4
LT		 25#include <linux/skbuff.h>
26#include <linux/if_ether.h>
27#include <linux/netdevice.h>
28#include <linux/spinlock.h>
29#include <linux/ethtool.h>
fd989c83 30#include <linux/etherdevice.h>
1da177e4
LT		 31#include <linux/if_bonding.h>
32#include <linux/pkt_sched.h>
e730c155 33#include <net/net_namespace.h>
1da177e4
LT		 34#include "bonding.h"
35#include "bond_3ad.h"
36
37// General definitions
38#define AD_SHORT_TIMEOUT 1
39#define AD_LONG_TIMEOUT 0
40#define AD_STANDBY 0x2
41#define AD_MAX_TX_IN_SECOND 3
42#define AD_COLLECTOR_MAX_DELAY 0
43
44// Timer definitions(43.4.4 in the 802.3ad standard)
45#define AD_FAST_PERIODIC_TIME 1
46#define AD_SLOW_PERIODIC_TIME 30
47#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
48#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
49#define AD_CHURN_DETECTION_TIME 60
50#define AD_AGGREGATE_WAIT_TIME 2
51
52// Port state definitions(43.4.2.2 in the 802.3ad standard)
53#define AD_STATE_LACP_ACTIVITY 0x1
54#define AD_STATE_LACP_TIMEOUT 0x2
55#define AD_STATE_AGGREGATION 0x4
56#define AD_STATE_SYNCHRONIZATION 0x8
57#define AD_STATE_COLLECTING 0x10
58#define AD_STATE_DISTRIBUTING 0x20
59#define AD_STATE_DEFAULTED 0x40
60#define AD_STATE_EXPIRED 0x80
61
62// Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
63#define AD_PORT_BEGIN 0x1
64#define AD_PORT_LACP_ENABLED 0x2
65#define AD_PORT_ACTOR_CHURN 0x4
66#define AD_PORT_PARTNER_CHURN 0x8
67#define AD_PORT_READY 0x10
68#define AD_PORT_READY_N 0x20
69#define AD_PORT_MATCHED 0x40
70#define AD_PORT_STANDBY 0x80
71#define AD_PORT_SELECTED 0x100
72#define AD_PORT_MOVED 0x200
73
74// Port Key definitions
75// key is determined according to the link speed, duplex and
76// user key(which is yet not supported)
77// ------------------------------------------------------------
78// Port key : | User key | Speed |Duplex|
79// ------------------------------------------------------------
80// 16 6 1 0
81#define AD_DUPLEX_KEY_BITS 0x1
82#define AD_SPEED_KEY_BITS 0x3E
83#define AD_USER_KEY_BITS 0xFFC0
84
85//dalloun
86#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
87#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
88#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
89#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
94dbffd5 90#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
1da177e4
LT		 91//endalloun
92
93// compare MAC addresses
94#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
95
128ea6c3 96static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
1da177e4
LT		 97static u16 ad_ticks_per_sec;
98static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
99
e4ac4320
HE		 100static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
101
1da177e4
LT		 102// ================= main 802.3ad protocol functions ==================
103static int ad_lacpdu_send(struct port *port);
1c3f0b8e 104static int ad_marker_send(struct port *port, struct bond_marker *marker);
1da177e4
LT		 105static void ad_mux_machine(struct port *port);
106static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
107static void ad_tx_machine(struct port *port);
108static void ad_periodic_machine(struct port *port);
109static void ad_port_selection_logic(struct port *port);
110static void ad_agg_selection_logic(struct aggregator *aggregator);
111static void ad_clear_agg(struct aggregator *aggregator);
112static void ad_initialize_agg(struct aggregator *aggregator);
113static void ad_initialize_port(struct port *port, int lacp_fast);
1da177e4
LT		 114static void ad_enable_collecting_distributing(struct port *port);
115static void ad_disable_collecting_distributing(struct port *port);
1c3f0b8e
MD		 116static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
117static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
1da177e4
LT		 118
119
120/////////////////////////////////////////////////////////////////////////////////
121// ================= api to bonding and kernel code ==================
122/////////////////////////////////////////////////////////////////////////////////
123
124/**
125 * __get_bond_by_port - get the port's bonding struct
126 * @port: the port we're looking at
127 *
128 * Return @port's bonding struct, or %NULL if it can't be found.
129 */
130static inline struct bonding *__get_bond_by_port(struct port *port)
131{
7bfc4753 132 if (port->slave == NULL)
1da177e4 133 return NULL;
1da177e4
LT		 134
135 return bond_get_bond_by_slave(port->slave);
136}
137
1da177e4
LT		 138/**
139 * __get_first_agg - get the first aggregator in the bond
140 * @bond: the bond we're looking at
141 *
142 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
143 * found.
144 */
145static inline struct aggregator *__get_first_agg(struct port *port)
146{
147 struct bonding *bond = __get_bond_by_port(port);
dec1e90e 148 struct slave *first_slave;
1da177e4
LT		 149
150 // If there's no bond for this port, or bond has no slaves
dec1e90e 151 if (bond == NULL)
1da177e4 152 return NULL;
dec1e90e 153 first_slave = bond_first_slave(bond);
1da177e4 154
dec1e90e 155 return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL;
1da177e4
LT		 156}
157
fd989c83
JV		 158/*
159 * __agg_has_partner
160 *
161 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
162 * address for the partner). Return 0 if not.
163 */
164static inline int __agg_has_partner(struct aggregator *agg)
165{
166 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
167}
168
1da177e4
LT		 169/**
170 * __disable_port - disable the port's slave
171 * @port: the port we're looking at
172 *
173 */
174static inline void __disable_port(struct port *port)
175{
176 bond_set_slave_inactive_flags(port->slave);
177}
178
179/**
180 * __enable_port - enable the port's slave, if it's up
181 * @port: the port we're looking at
182 *
183 */
184static inline void __enable_port(struct port *port)
185{
186 struct slave *slave = port->slave;
187
7bfc4753 188 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
1da177e4 189 bond_set_slave_active_flags(slave);
1da177e4
LT		 190}
191
192/**
193 * __port_is_enabled - check if the port's slave is in active state
194 * @port: the port we're looking at
195 *
196 */
197static inline int __port_is_enabled(struct port *port)
198{
e30bc066 199 return bond_is_active_slave(port->slave);
1da177e4
LT		 200}
201
202/**
203 * __get_agg_selection_mode - get the aggregator selection mode
204 * @port: the port we're looking at
205 *
fd989c83 206 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 207 */
208static inline u32 __get_agg_selection_mode(struct port *port)
209{
210 struct bonding *bond = __get_bond_by_port(port);
211
7bfc4753 212 if (bond == NULL)
fd989c83 213 return BOND_AD_STABLE;
1da177e4 214
1a14fbcb 215 return bond->params.ad_select;
1da177e4
LT		 216}
217
218/**
219 * __check_agg_selection_timer - check if the selection timer has expired
220 * @port: the port we're looking at
221 *
222 */
223static inline int __check_agg_selection_timer(struct port *port)
224{
225 struct bonding *bond = __get_bond_by_port(port);
226
7bfc4753 227 if (bond == NULL)
1da177e4 228 return 0;
1da177e4
LT		 229
230 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
231}
232
233/**
9ac3524a 234 * __get_state_machine_lock - lock the port's state machines
1da177e4
LT		 235 * @port: the port we're looking at
236 *
237 */
9ac3524a 238static inline void __get_state_machine_lock(struct port *port)
1da177e4 239{
9ac3524a 240 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 241}
242
243/**
9ac3524a 244 * __release_state_machine_lock - unlock the port's state machines
1da177e4
LT		 245 * @port: the port we're looking at
246 *
247 */
9ac3524a 248static inline void __release_state_machine_lock(struct port *port)
1da177e4 249{
9ac3524a 250 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
1da177e4
LT		 251}
252
253/**
254 * __get_link_speed - get a port's speed
255 * @port: the port we're looking at
256 *
257 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
258 * 0,
259 * %AD_LINK_SPEED_BITMASK_10MBPS,
260 * %AD_LINK_SPEED_BITMASK_100MBPS,
94dbffd5
JV		 261 * %AD_LINK_SPEED_BITMASK_1000MBPS,
262 * %AD_LINK_SPEED_BITMASK_10000MBPS
1da177e4
LT		 263 */
264static u16 __get_link_speed(struct port *port)
265{
266 struct slave *slave = port->slave;
267 u16 speed;
268
269 /* this if covers only a special case: when the configuration starts with
270 * link down, it sets the speed to 0.
271 * This is done in spite of the fact that the e100 driver reports 0 to be
272 * compatible with MVT in the future.*/
7bfc4753 273 if (slave->link != BOND_LINK_UP)
128ea6c3 274 speed = 0;
7bfc4753 275 else {
1da177e4
LT		 276 switch (slave->speed) {
277 case SPEED_10:
278 speed = AD_LINK_SPEED_BITMASK_10MBPS;
279 break;
280
281 case SPEED_100:
282 speed = AD_LINK_SPEED_BITMASK_100MBPS;
283 break;
284
285 case SPEED_1000:
286 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
287 break;
288
94dbffd5
JV		 289 case SPEED_10000:
290 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
291 break;
292
1da177e4
LT		 293 default:
294 speed = 0; // unknown speed value from ethtool. shouldn't happen
295 break;
296 }
297 }
298
a4aee5c8
JP		 299 pr_debug("Port %d Received link speed %d update from adapter\n",
300 port->actor_port_number, speed);
1da177e4
LT		 301 return speed;
302}
303
304/**
305 * __get_duplex - get a port's duplex
306 * @port: the port we're looking at
307 *
308 * Return @port's duplex in 802.3ad bitmask format. i.e.:
309 * 0x01 if in full duplex
310 * 0x00 otherwise
311 */
312static u8 __get_duplex(struct port *port)
313{
314 struct slave *slave = port->slave;
315
316 u8 retval;
317
318 // handling a special case: when the configuration starts with
319 // link down, it sets the duplex to 0.
7bfc4753 320 if (slave->link != BOND_LINK_UP)
128ea6c3 321 retval = 0x0;
7bfc4753 322 else {
1da177e4
LT		 323 switch (slave->duplex) {
324 case DUPLEX_FULL:
128ea6c3 325 retval = 0x1;
a4aee5c8
JP		 326 pr_debug("Port %d Received status full duplex update from adapter\n",
327 port->actor_port_number);
1da177e4
LT		 328 break;
329 case DUPLEX_HALF:
330 default:
128ea6c3 331 retval = 0x0;
a4aee5c8
JP		 332 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
333 port->actor_port_number);
1da177e4
LT		 334 break;
335 }
336 }
337 return retval;
338}
339
340/**
9ac3524a 341 * __initialize_port_locks - initialize a port's STATE machine spinlock
e0809dbc 342 * @port: the slave of the port we're looking at
1da177e4
LT		 343 *
344 */
e0809dbc 345static inline void __initialize_port_locks(struct slave *slave)
1da177e4
LT		 346{
347 // make sure it isn't called twice
e0809dbc 348 spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock));
1da177e4
LT		 349}
350
351//conversions
1da177e4
LT		 352
353/**
354 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
355 * @timer_type: which timer to operate
356 * @par: timer parameter. see below
357 *
358 * If @timer_type is %current_while_timer, @par indicates long/short timer.
359 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
360 * %SLOW_PERIODIC_TIME.
361 */
362static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
363{
128ea6c3 364 u16 retval = 0; /* to silence the compiler */
1da177e4
LT		 365
366 switch (timer_type) {
367 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
7bfc4753 368 if (par)
1da177e4 369 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
7bfc4753 370 else
1da177e4 371 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
1da177e4
LT		 372 break;
373 case AD_ACTOR_CHURN_TIMER: // for local churn machine
374 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
375 break;
376 case AD_PERIODIC_TIMER: // for periodic machine
377 retval = (par*ad_ticks_per_sec); // long timeout
378 break;
379 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
380 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
381 break;
382 case AD_WAIT_WHILE_TIMER: // for selection machine
383 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
384 break;
385 }
386 return retval;
387}
388
389
390/////////////////////////////////////////////////////////////////////////////////
391// ================= ad_rx_machine helper functions ==================
392/////////////////////////////////////////////////////////////////////////////////
393
2d6682db
JV		 394/**
395 * __choose_matched - update a port's matched variable from a received lacpdu
396 * @lacpdu: the lacpdu we've received
397 * @port: the port we're looking at
398 *
399 * Update the value of the matched variable, using parameter values from a
400 * newly received lacpdu. Parameter values for the partner carried in the
401 * received PDU are compared with the corresponding operational parameter
402 * values for the actor. Matched is set to TRUE if all of these parameters
403 * match and the PDU parameter partner_state.aggregation has the same value as
404 * actor_oper_port_state.aggregation and lacp will actively maintain the link
405 * in the aggregation. Matched is also set to TRUE if the value of
406 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
407 * an individual link and lacp will actively maintain the link. Otherwise,
408 * matched is set to FALSE. LACP is considered to be actively maintaining the
409 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
410 * the actor's actor_oper_port_state.lacp_activity and the PDU's
411 * partner_state.lacp_activity variables are TRUE.
412 *
413 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
414 * used here to implement the language from 802.3ad 43.4.9 that requires
415 * recordPDU to "match" the LACPDU parameters to the stored values.
416 */
417static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
418{
419 // check if all parameters are alike
420 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
421 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
422 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
423 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
424 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
425 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
426 // or this is individual link(aggregation == FALSE)
427 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
428 ) {
429 // update the state machine Matched variable
430 port->sm_vars |= AD_PORT_MATCHED;
431 } else {
432 port->sm_vars &= ~AD_PORT_MATCHED;
433 }
434}
435
1da177e4
LT		 436/**
437 * __record_pdu - record parameters from a received lacpdu
438 * @lacpdu: the lacpdu we've received
439 * @port: the port we're looking at
440 *
441 * Record the parameter values for the Actor carried in a received lacpdu as
442 * the current partner operational parameter values and sets
443 * actor_oper_port_state.defaulted to FALSE.
444 */
445static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
446{
1da177e4 447 if (lacpdu && port) {
b99d6ba9
HE		 448 struct port_params *partner = &port->partner_oper;
449
2d6682db 450 __choose_matched(lacpdu, port);
1da177e4 451 // record the new parameter values for the partner operational
b99d6ba9
HE		 452 partner->port_number = ntohs(lacpdu->actor_port);
453 partner->port_priority = ntohs(lacpdu->actor_port_priority);
454 partner->system = lacpdu->actor_system;
455 partner->system_priority = ntohs(lacpdu->actor_system_priority);
456 partner->key = ntohs(lacpdu->actor_key);
457 partner->port_state = lacpdu->actor_state;
1da177e4
LT		 458
459 // set actor_oper_port_state.defaulted to FALSE
460 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
461
462 // set the partner sync. to on if the partner is sync. and the port is matched
7bfc4753
BD		 463 if ((port->sm_vars & AD_PORT_MATCHED)
464 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
b99d6ba9 465 partner->port_state |= AD_STATE_SYNCHRONIZATION;
7bfc4753 466 else
b99d6ba9 467 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 468 }
469}
470
471/**
472 * __record_default - record default parameters
473 * @port: the port we're looking at
474 *
475 * This function records the default parameter values for the partner carried
476 * in the Partner Admin parameters as the current partner operational parameter
477 * values and sets actor_oper_port_state.defaulted to TRUE.
478 */
479static void __record_default(struct port *port)
480{
1da177e4
LT		 481 if (port) {
482 // record the partner admin parameters
5eefd1ad
HE		 483 memcpy(&port->partner_oper, &port->partner_admin,
484 sizeof(struct port_params));
1da177e4
LT		 485
486 // set actor_oper_port_state.defaulted to true
487 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
488 }
489}
490
491/**
492 * __update_selected - update a port's Selected variable from a received lacpdu
493 * @lacpdu: the lacpdu we've received
494 * @port: the port we're looking at
495 *
496 * Update the value of the selected variable, using parameter values from a
497 * newly received lacpdu. The parameter values for the Actor carried in the
498 * received PDU are compared with the corresponding operational parameter
499 * values for the ports partner. If one or more of the comparisons shows that
500 * the value(s) received in the PDU differ from the current operational values,
501 * then selected is set to FALSE and actor_oper_port_state.synchronization is
502 * set to out_of_sync. Otherwise, selected remains unchanged.
503 */
504static void __update_selected(struct lacpdu *lacpdu, struct port *port)
505{
1da177e4 506 if (lacpdu && port) {
ce6a49ad
HE		 507 const struct port_params *partner = &port->partner_oper;
508
1da177e4 509 // check if any parameter is different
8e95a202
JP		 510 if (ntohs(lacpdu->actor_port) != partner->port_number ||
511 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
512 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
513 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
514 ntohs(lacpdu->actor_key) != partner->key ||
515 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 516 // update the state machine Selected variable
517 port->sm_vars &= ~AD_PORT_SELECTED;
518 }
519 }
520}
521
522/**
523 * __update_default_selected - update a port's Selected variable from Partner
524 * @port: the port we're looking at
525 *
526 * This function updates the value of the selected variable, using the partner
527 * administrative parameter values. The administrative values are compared with
528 * the corresponding operational parameter values for the partner. If one or
529 * more of the comparisons shows that the administrative value(s) differ from
530 * the current operational values, then Selected is set to FALSE and
531 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
532 * Selected remains unchanged.
533 */
534static void __update_default_selected(struct port *port)
535{
1da177e4 536 if (port) {
3c52065f
HE		 537 const struct port_params *admin = &port->partner_admin;
538 const struct port_params *oper = &port->partner_oper;
539
1da177e4 540 // check if any parameter is different
8e95a202
JP		 541 if (admin->port_number != oper->port_number ||
542 admin->port_priority != oper->port_priority ||
543 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
544 admin->system_priority != oper->system_priority ||
545 admin->key != oper->key ||
546 (admin->port_state & AD_STATE_AGGREGATION)
3c52065f 547 != (oper->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 548 // update the state machine Selected variable
549 port->sm_vars &= ~AD_PORT_SELECTED;
550 }
551 }
552}
553
1da177e4
LT		 554/**
555 * __update_ntt - update a port's ntt variable from a received lacpdu
556 * @lacpdu: the lacpdu we've received
557 * @port: the port we're looking at
558 *
559 * Updates the value of the ntt variable, using parameter values from a newly
560 * received lacpdu. The parameter values for the partner carried in the
561 * received PDU are compared with the corresponding operational parameter
562 * values for the Actor. If one or more of the comparisons shows that the
563 * value(s) received in the PDU differ from the current operational values,
564 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
565 */
566static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
567{
568 // validate lacpdu and port
569 if (lacpdu && port) {
570 // check if any parameter is different
89cc76f9
JV		 571 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
572 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
1da177e4 573 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 574 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
575 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 576 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
577 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
578 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
579 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
580 ) {
d238d458
HE		 581
582 port->ntt = true;
1da177e4
LT		 583 }
584 }
585}
586
587/**
588 * __attach_bond_to_agg
589 * @port: the port we're looking at
590 *
591 * Handle the attaching of the port's control parser/multiplexer and the
592 * aggregator. This function does nothing since the parser/multiplexer of the
593 * receive and the parser/multiplexer of the aggregator are already combined.
594 */
595static void __attach_bond_to_agg(struct port *port)
596{
128ea6c3 597 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 598 // This function does nothing since the parser/multiplexer of the receive
599 // and the parser/multiplexer of the aggregator are already combined
600}
601
602/**
603 * __detach_bond_from_agg
604 * @port: the port we're looking at
605 *
606 * Handle the detaching of the port's control parser/multiplexer from the
607 * aggregator. This function does nothing since the parser/multiplexer of the
608 * receive and the parser/multiplexer of the aggregator are already combined.
609 */
610static void __detach_bond_from_agg(struct port *port)
611{
128ea6c3 612 port = NULL; /* just to satisfy the compiler */
b9d6d2db 613 // This function does nothing since the parser/multiplexer of the receive
1da177e4
LT		 614 // and the parser/multiplexer of the aggregator are already combined
615}
616
617/**
618 * __agg_ports_are_ready - check if all ports in an aggregator are ready
619 * @aggregator: the aggregator we're looking at
620 *
621 */
622static int __agg_ports_are_ready(struct aggregator *aggregator)
623{
624 struct port *port;
625 int retval = 1;
626
627 if (aggregator) {
628 // scan all ports in this aggregator to verfy if they are all ready
128ea6c3
BD		 629 for (port = aggregator->lag_ports;
630 port;
631 port = port->next_port_in_aggregator) {
1da177e4
LT		 632 if (!(port->sm_vars & AD_PORT_READY_N)) {
633 retval = 0;
634 break;
635 }
636 }
637 }
638
639 return retval;
640}
641
642/**
643 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
644 * @aggregator: the aggregator we're looking at
645 * @val: Should the ports' ready bit be set on or off
646 *
647 */
648static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
649{
650 struct port *port;
651
128ea6c3
BD		 652 for (port = aggregator->lag_ports; port;
653 port = port->next_port_in_aggregator) {
7bfc4753 654 if (val)
1da177e4 655 port->sm_vars |= AD_PORT_READY;
7bfc4753 656 else
1da177e4 657 port->sm_vars &= ~AD_PORT_READY;
1da177e4
LT		 658 }
659}
660
661/**
662 * __get_agg_bandwidth - get the total bandwidth of an aggregator
663 * @aggregator: the aggregator we're looking at
664 *
665 */
666static u32 __get_agg_bandwidth(struct aggregator *aggregator)
667{
128ea6c3 668 u32 bandwidth = 0;
1da177e4
LT		 669
670 if (aggregator->num_of_ports) {
65cce19c 671 switch (__get_link_speed(aggregator->lag_ports)) {
1da177e4
LT		 672 case AD_LINK_SPEED_BITMASK_1MBPS:
673 bandwidth = aggregator->num_of_ports;
674 break;
675 case AD_LINK_SPEED_BITMASK_10MBPS:
676 bandwidth = aggregator->num_of_ports * 10;
677 break;
678 case AD_LINK_SPEED_BITMASK_100MBPS:
679 bandwidth = aggregator->num_of_ports * 100;
680 break;
681 case AD_LINK_SPEED_BITMASK_1000MBPS:
682 bandwidth = aggregator->num_of_ports * 1000;
683 break;
94dbffd5
JV		 684 case AD_LINK_SPEED_BITMASK_10000MBPS:
685 bandwidth = aggregator->num_of_ports * 10000;
686 break;
1da177e4 687 default:
128ea6c3 688 bandwidth = 0; /*to silence the compiler ....*/
1da177e4
LT		 689 }
690 }
691 return bandwidth;
692}
693
694/**
695 * __get_active_agg - get the current active aggregator
696 * @aggregator: the aggregator we're looking at
697 *
698 */
699static struct aggregator *__get_active_agg(struct aggregator *aggregator)
700{
19177e7d
VF		 701 struct bonding *bond = aggregator->slave->bond;
702 struct list_head *iter;
703 struct slave *slave;
1da177e4 704
19177e7d
VF		 705 bond_for_each_slave(bond, slave, iter)
706 if (SLAVE_AD_INFO(slave).aggregator.is_active)
707 return &(SLAVE_AD_INFO(slave).aggregator);
1da177e4 708
19177e7d 709 return NULL;
1da177e4
LT		 710}
711
712/**
713 * __update_lacpdu_from_port - update a port's lacpdu fields
714 * @port: the port we're looking at
715 *
716 */
717static inline void __update_lacpdu_from_port(struct port *port)
718{
719 struct lacpdu *lacpdu = &port->lacpdu;
3b5b35d0 720 const struct port_params *partner = &port->partner_oper;
1da177e4
LT		 721
722 /* update current actual Actor parameters */
723 /* lacpdu->subtype initialized
724 * lacpdu->version_number initialized
725 * lacpdu->tlv_type_actor_info initialized
726 * lacpdu->actor_information_length initialized
727 */
728
d3bb52b0 729 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 730 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 731 lacpdu->actor_key = htons(port->actor_oper_port_key);
732 lacpdu->actor_port_priority = htons(port->actor_port_priority);
733 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4
LT		 734 lacpdu->actor_state = port->actor_oper_port_state;
735
736 /* lacpdu->reserved_3_1 initialized
737 * lacpdu->tlv_type_partner_info initialized
738 * lacpdu->partner_information_length initialized
739 */
740
3b5b35d0
HE		 741 lacpdu->partner_system_priority = htons(partner->system_priority);
742 lacpdu->partner_system = partner->system;
743 lacpdu->partner_key = htons(partner->key);
744 lacpdu->partner_port_priority = htons(partner->port_priority);
745 lacpdu->partner_port = htons(partner->port_number);
746 lacpdu->partner_state = partner->port_state;
1da177e4
LT		 747
748 /* lacpdu->reserved_3_2 initialized
749 * lacpdu->tlv_type_collector_info initialized
750 * lacpdu->collector_information_length initialized
751 * collector_max_delay initialized
752 * reserved_12[12] initialized
753 * tlv_type_terminator initialized
754 * terminator_length initialized
755 * reserved_50[50] initialized
756 */
1da177e4
LT		 757}
758
759//////////////////////////////////////////////////////////////////////////////////////
760// ================= main 802.3ad protocol code ======================================
761//////////////////////////////////////////////////////////////////////////////////////
762
763/**
764 * ad_lacpdu_send - send out a lacpdu packet on a given port
765 * @port: the port we're looking at
766 *
767 * Returns: 0 on success
768 * < 0 on error
769 */
770static int ad_lacpdu_send(struct port *port)
771{
772 struct slave *slave = port->slave;
773 struct sk_buff *skb;
774 struct lacpdu_header *lacpdu_header;
775 int length = sizeof(struct lacpdu_header);
1da177e4
LT		 776
777 skb = dev_alloc_skb(length);
7bfc4753 778 if (!skb)
1da177e4 779 return -ENOMEM;
1da177e4
LT		 780
781 skb->dev = slave->dev;
459a98ed 782 skb_reset_mac_header(skb);
b0e380b1 783 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 784 skb->protocol = PKT_TYPE_LACPDU;
785 skb->priority = TC_PRIO_CONTROL;
786
787 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
788
e727149e 789 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 790 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 791 because we use it to identify loopback lacpdus in receive. */
e727149e
HE		 792 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
793 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 794
795 lacpdu_header->lacpdu = port->lacpdu; // struct copy
796
797 dev_queue_xmit(skb);
798
799 return 0;
800}
801
802/**
803 * ad_marker_send - send marker information/response on a given port
804 * @port: the port we're looking at
805 * @marker: marker data to send
806 *
807 * Returns: 0 on success
808 * < 0 on error
809 */
1c3f0b8e 810static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 811{
812 struct slave *slave = port->slave;
813 struct sk_buff *skb;
1c3f0b8e
MD		 814 struct bond_marker_header *marker_header;
815 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 816
817 skb = dev_alloc_skb(length + 16);
7bfc4753 818 if (!skb)
1da177e4 819 return -ENOMEM;
1da177e4
LT		 820
821 skb_reserve(skb, 16);
822
823 skb->dev = slave->dev;
459a98ed 824 skb_reset_mac_header(skb);
b0e380b1 825 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 826 skb->protocol = PKT_TYPE_LACPDU;
827
1c3f0b8e 828 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4 829
e727149e 830 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
b595076a 831 /* Note: source address is set to be the member's PERMANENT address,
e4ac4320 832 because we use it to identify loopback MARKERs in receive. */
e727149e
HE		 833 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
834 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4
LT		 835
836 marker_header->marker = *marker; // struct copy
837
838 dev_queue_xmit(skb);
839
840 return 0;
841}
842
843/**
844 * ad_mux_machine - handle a port's mux state machine
845 * @port: the port we're looking at
846 *
847 */
848static void ad_mux_machine(struct port *port)
849{
850 mux_states_t last_state;
851
852 // keep current State Machine state to compare later if it was changed
853 last_state = port->sm_mux_state;
854
855 if (port->sm_vars & AD_PORT_BEGIN) {
856 port->sm_mux_state = AD_MUX_DETACHED; // next state
857 } else {
858 switch (port->sm_mux_state) {
859 case AD_MUX_DETACHED:
7bfc4753
BD		 860 if ((port->sm_vars & AD_PORT_SELECTED)
861 || (port->sm_vars & AD_PORT_STANDBY))
862 /* if SELECTED or STANDBY */
1da177e4 863 port->sm_mux_state = AD_MUX_WAITING; // next state
1da177e4
LT		 864 break;
865 case AD_MUX_WAITING:
866 // if SELECTED == FALSE return to DETACH state
867 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
868 port->sm_vars &= ~AD_PORT_READY_N;
869 // in order to withhold the Selection Logic to check all ports READY_N value
870 // every callback cycle to update ready variable, we check READY_N and update READY here
871 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
872 port->sm_mux_state = AD_MUX_DETACHED; // next state
873 break;
874 }
875
876 // check if the wait_while_timer expired
7bfc4753
BD		 877 if (port->sm_mux_timer_counter
878 && !(--port->sm_mux_timer_counter))
1da177e4 879 port->sm_vars |= AD_PORT_READY_N;
1da177e4
LT		 880
881 // in order to withhold the selection logic to check all ports READY_N value
882 // every callback cycle to update ready variable, we check READY_N and update READY here
883 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
884
885 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
7bfc4753
BD		 886 if ((port->sm_vars & AD_PORT_READY)
887 && !port->sm_mux_timer_counter)
1da177e4 888 port->sm_mux_state = AD_MUX_ATTACHED; // next state
1da177e4
LT		 889 break;
890 case AD_MUX_ATTACHED:
891 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
1055c9ab 892 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
1da177e4
LT		 893 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
894 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
895 port->sm_vars &= ~AD_PORT_READY_N;
896 // in order to withhold the selection logic to check all ports READY_N value
897 // every callback cycle to update ready variable, we check READY_N and update READY here
898 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
899 port->sm_mux_state = AD_MUX_DETACHED;// next state
900 }
901 break;
902 case AD_MUX_COLLECTING_DISTRIBUTING:
903 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
1055c9ab 904 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
1da177e4
LT		 905 ) {
906 port->sm_mux_state = AD_MUX_ATTACHED;// next state
907
908 } else {
909 // if port state hasn't changed make
910 // sure that a collecting distributing
911 // port in an active aggregator is enabled
912 if (port->aggregator &&
913 port->aggregator->is_active &&
914 !__port_is_enabled(port)) {
915
916 __enable_port(port);
917 }
918 }
919 break;
920 default: //to silence the compiler
921 break;
922 }
923 }
924
925 // check if the state machine was changed
926 if (port->sm_mux_state != last_state) {
a4aee5c8
JP		 927 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
928 port->actor_port_number, last_state,
929 port->sm_mux_state);
1da177e4
LT		 930 switch (port->sm_mux_state) {
931 case AD_MUX_DETACHED:
932 __detach_bond_from_agg(port);
933 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
934 ad_disable_collecting_distributing(port);
935 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
936 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
d238d458 937 port->ntt = true;
1da177e4
LT		 938 break;
939 case AD_MUX_WAITING:
940 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
941 break;
942 case AD_MUX_ATTACHED:
943 __attach_bond_to_agg(port);
944 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
945 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
946 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
947 ad_disable_collecting_distributing(port);
d238d458 948 port->ntt = true;
1da177e4
LT		 949 break;
950 case AD_MUX_COLLECTING_DISTRIBUTING:
951 port->actor_oper_port_state |= AD_STATE_COLLECTING;
952 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
953 ad_enable_collecting_distributing(port);
d238d458 954 port->ntt = true;
1da177e4
LT		 955 break;
956 default: //to silence the compiler
957 break;
958 }
959 }
960}
961
962/**
963 * ad_rx_machine - handle a port's rx State Machine
964 * @lacpdu: the lacpdu we've received
965 * @port: the port we're looking at
966 *
967 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
968 * CURRENT. If timer expired set the state machine in the proper state.
969 * In other cases, this function checks if we need to switch to other state.
970 */
971static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
972{
973 rx_states_t last_state;
974
1da177e4
LT		 975 // keep current State Machine state to compare later if it was changed
976 last_state = port->sm_rx_state;
977
978 // check if state machine should change state
979 // first, check if port was reinitialized
7bfc4753
BD		 980 if (port->sm_vars & AD_PORT_BEGIN)
981 /* next state */
982 port->sm_rx_state = AD_RX_INITIALIZE;
1da177e4 983 // check if port is not enabled
7bfc4753
BD		 984 else if (!(port->sm_vars & AD_PORT_BEGIN)
985 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
986 /* next state */
987 port->sm_rx_state = AD_RX_PORT_DISABLED;
1da177e4
LT		 988 // check if new lacpdu arrived
989 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
990 port->sm_rx_timer_counter = 0; // zero timer
991 port->sm_rx_state = AD_RX_CURRENT;
992 } else {
993 // if timer is on, and if it is expired
994 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
995 switch (port->sm_rx_state) {
996 case AD_RX_EXPIRED:
997 port->sm_rx_state = AD_RX_DEFAULTED; // next state
998 break;
999 case AD_RX_CURRENT:
1000 port->sm_rx_state = AD_RX_EXPIRED; // next state
1001 break;
1002 default: //to silence the compiler
1003 break;
1004 }
1005 } else {
1006 // if no lacpdu arrived and no timer is on
1007 switch (port->sm_rx_state) {
1008 case AD_RX_PORT_DISABLED:
7bfc4753 1009 if (port->sm_vars & AD_PORT_MOVED)
1da177e4 1010 port->sm_rx_state = AD_RX_INITIALIZE; // next state
7bfc4753
BD		 1011 else if (port->is_enabled
1012 && (port->sm_vars
1013 & AD_PORT_LACP_ENABLED))
1da177e4 1014 port->sm_rx_state = AD_RX_EXPIRED; // next state
7bfc4753
BD		 1015 else if (port->is_enabled
1016 && ((port->sm_vars
1017 & AD_PORT_LACP_ENABLED) == 0))
1da177e4 1018 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
1da177e4
LT		 1019 break;
1020 default: //to silence the compiler
1021 break;
1022
1023 }
1024 }
1025 }
1026
1027 // check if the State machine was changed or new lacpdu arrived
1028 if ((port->sm_rx_state != last_state) || (lacpdu)) {
a4aee5c8
JP		 1029 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1030 port->actor_port_number, last_state,
1031 port->sm_rx_state);
1da177e4
LT		 1032 switch (port->sm_rx_state) {
1033 case AD_RX_INITIALIZE:
7bfc4753 1034 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1035 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
7bfc4753 1036 else
1da177e4 1037 port->sm_vars |= AD_PORT_LACP_ENABLED;
1da177e4
LT		 1038 port->sm_vars &= ~AD_PORT_SELECTED;
1039 __record_default(port);
1040 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1041 port->sm_vars &= ~AD_PORT_MOVED;
1042 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1043
1044 /*- Fall Through -*/
1045
1046 case AD_RX_PORT_DISABLED:
1047 port->sm_vars &= ~AD_PORT_MATCHED;
1048 break;
1049 case AD_RX_LACP_DISABLED:
1050 port->sm_vars &= ~AD_PORT_SELECTED;
1051 __record_default(port);
1055c9ab 1052 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1053 port->sm_vars |= AD_PORT_MATCHED;
1054 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1055 break;
1056 case AD_RX_EXPIRED:
1057 //Reset of the Synchronization flag. (Standard 43.4.12)
1058 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1059 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
1055c9ab 1060 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1061 port->sm_vars &= ~AD_PORT_MATCHED;
8e321c4f
JL		 1062 port->partner_oper.port_state |=
1063 AD_STATE_LACP_ACTIVITY;
1da177e4
LT		 1064 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1065 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1066 break;
1067 case AD_RX_DEFAULTED:
1068 __update_default_selected(port);
1069 __record_default(port);
1070 port->sm_vars |= AD_PORT_MATCHED;
1071 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1072 break;
1073 case AD_RX_CURRENT:
1074 // detect loopback situation
1075 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1076 // INFO_RECEIVED_LOOPBACK_FRAMES
a4aee5c8
JP		 1077 pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
1078 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
471cb5a3 1079 port->slave->bond->dev->name, port->slave->dev->name);
1da177e4
LT		 1080 return;
1081 }
1082 __update_selected(lacpdu, port);
1083 __update_ntt(lacpdu, port);
1084 __record_pdu(lacpdu, port);
1da177e4
LT		 1085 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1086 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1da177e4
LT		 1087 break;
1088 default: //to silence the compiler
1089 break;
1090 }
1091 }
1da177e4
LT		 1092}
1093
1094/**
1095 * ad_tx_machine - handle a port's tx state machine
1096 * @port: the port we're looking at
1097 *
1098 */
1099static void ad_tx_machine(struct port *port)
1100{
1101 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1102 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1103 // check if there is something to send
1104 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1105 __update_lacpdu_from_port(port);
d238d458 1106
1da177e4 1107 if (ad_lacpdu_send(port) >= 0) {
a4aee5c8
JP		 1108 pr_debug("Sent LACPDU on port %d\n",
1109 port->actor_port_number);
d238d458
HE		 1110
1111 /* mark ntt as false, so it will not be sent again until
1112 demanded */
1113 port->ntt = false;
1da177e4
LT		 1114 }
1115 }
1116 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
128ea6c3
BD		 1117 port->sm_tx_timer_counter =
1118 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 1119 }
1120}
1121
1122/**
1123 * ad_periodic_machine - handle a port's periodic state machine
1124 * @port: the port we're looking at
1125 *
1126 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1127 */
1128static void ad_periodic_machine(struct port *port)
1129{
1130 periodic_states_t last_state;
1131
1132 // keep current state machine state to compare later if it was changed
1133 last_state = port->sm_periodic_state;
1134
1135 // check if port was reinitialized
1136 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1137 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4
LT		 1138 ) {
1139 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1140 }
1141 // check if state machine should change state
1142 else if (port->sm_periodic_timer_counter) {
1143 // check if periodic state machine expired
1144 if (!(--port->sm_periodic_timer_counter)) {
1145 // if expired then do tx
1146 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1147 } else {
1148 // If not expired, check if there is some new timeout parameter from the partner state
1149 switch (port->sm_periodic_state) {
1150 case AD_FAST_PERIODIC:
7bfc4753
BD		 1151 if (!(port->partner_oper.port_state
1152 & AD_STATE_LACP_TIMEOUT))
1da177e4 1153 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
1da177e4
LT		 1154 break;
1155 case AD_SLOW_PERIODIC:
1055c9ab 1156 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4
LT		 1157 // stop current timer
1158 port->sm_periodic_timer_counter = 0;
1159 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1160 }
1161 break;
1162 default: //to silence the compiler
1163 break;
1164 }
1165 }
1166 } else {
1167 switch (port->sm_periodic_state) {
1168 case AD_NO_PERIODIC:
1169 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1170 break;
1171 case AD_PERIODIC_TX:
7bfc4753
BD		 1172 if (!(port->partner_oper.port_state
1173 & AD_STATE_LACP_TIMEOUT))
1da177e4 1174 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
7bfc4753 1175 else
1da177e4 1176 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1da177e4
LT		 1177 break;
1178 default: //to silence the compiler
1179 break;
1180 }
1181 }
1182
1183 // check if the state machine was changed
1184 if (port->sm_periodic_state != last_state) {
a4aee5c8
JP		 1185 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1186 port->actor_port_number, last_state,
1187 port->sm_periodic_state);
1da177e4
LT		 1188 switch (port->sm_periodic_state) {
1189 case AD_NO_PERIODIC:
1190 port->sm_periodic_timer_counter = 0; // zero timer
1191 break;
1192 case AD_FAST_PERIODIC:
1193 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
1194 break;
1195 case AD_SLOW_PERIODIC:
1196 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
1197 break;
1198 case AD_PERIODIC_TX:
d238d458 1199 port->ntt = true;
1da177e4
LT		 1200 break;
1201 default: //to silence the compiler
1202 break;
1203 }
1204 }
1205}
1206
1207/**
1208 * ad_port_selection_logic - select aggregation groups
1209 * @port: the port we're looking at
1210 *
1211 * Select aggregation groups, and assign each port for it's aggregetor. The
1212 * selection logic is called in the inititalization (after all the handshkes),
1213 * and after every lacpdu receive (if selected is off).
1214 */
1215static void ad_port_selection_logic(struct port *port)
1216{
1217 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1218 struct port *last_port = NULL, *curr_port;
3e36bb75
VF		 1219 struct list_head *iter;
1220 struct bonding *bond;
1221 struct slave *slave;
1da177e4
LT		 1222 int found = 0;
1223
1224 // if the port is already Selected, do nothing
7bfc4753 1225 if (port->sm_vars & AD_PORT_SELECTED)
1da177e4 1226 return;
1da177e4 1227
3e36bb75
VF		 1228 bond = __get_bond_by_port(port);
1229
1da177e4
LT		 1230 // if the port is connected to other aggregator, detach it
1231 if (port->aggregator) {
1232 // detach the port from its former aggregator
128ea6c3
BD		 1233 temp_aggregator = port->aggregator;
1234 for (curr_port = temp_aggregator->lag_ports; curr_port;
1235 last_port = curr_port,
1236 curr_port = curr_port->next_port_in_aggregator) {
1da177e4
LT		 1237 if (curr_port == port) {
1238 temp_aggregator->num_of_ports--;
1239 if (!last_port) {// if it is the first port attached to the aggregator
128ea6c3
BD		 1240 temp_aggregator->lag_ports =
1241 port->next_port_in_aggregator;
1da177e4 1242 } else {// not the first port attached to the aggregator
128ea6c3
BD		 1243 last_port->next_port_in_aggregator =
1244 port->next_port_in_aggregator;
1da177e4
LT		 1245 }
1246
1247 // clear the port's relations to this aggregator
1248 port->aggregator = NULL;
128ea6c3
BD		 1249 port->next_port_in_aggregator = NULL;
1250 port->actor_port_aggregator_identifier = 0;
1da177e4 1251
a4aee5c8
JP		 1252 pr_debug("Port %d left LAG %d\n",
1253 port->actor_port_number,
1254 temp_aggregator->aggregator_identifier);
1da177e4 1255 // if the aggregator is empty, clear its parameters, and set it ready to be attached
7bfc4753 1256 if (!temp_aggregator->lag_ports)
1da177e4 1257 ad_clear_agg(temp_aggregator);
1da177e4
LT		 1258 break;
1259 }
1260 }
1261 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
a4aee5c8 1262 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
471cb5a3 1263 port->slave->bond->dev->name,
e5e2a8fd
JP		 1264 port->actor_port_number,
1265 port->slave->dev->name,
1266 port->aggregator->aggregator_identifier);
1da177e4
LT		 1267 }
1268 }
1269 // search on all aggregators for a suitable aggregator for this port
3e36bb75
VF		 1270 bond_for_each_slave(bond, slave, iter) {
1271 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1da177e4
LT		 1272
1273 // keep a free aggregator for later use(if needed)
1274 if (!aggregator->lag_ports) {
7bfc4753 1275 if (!free_aggregator)
128ea6c3 1276 free_aggregator = aggregator;
1da177e4
LT		 1277 continue;
1278 }
1279 // check if current aggregator suits us
1280 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
1055c9ab
HE		 1281 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1282 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1283 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1284 ) &&
1055c9ab 1285 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
1da177e4
LT		 1286 !aggregator->is_individual) // but is not individual OR
1287 )
1288 ) {
1289 // attach to the founded aggregator
1290 port->aggregator = aggregator;
128ea6c3
BD		 1291 port->actor_port_aggregator_identifier =
1292 port->aggregator->aggregator_identifier;
1293 port->next_port_in_aggregator = aggregator->lag_ports;
1da177e4 1294 port->aggregator->num_of_ports++;
128ea6c3 1295 aggregator->lag_ports = port;
a4aee5c8
JP		 1296 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1297 port->actor_port_number,
1298 port->aggregator->aggregator_identifier);
1da177e4
LT		 1299
1300 // mark this port as selected
1301 port->sm_vars |= AD_PORT_SELECTED;
1302 found = 1;
1303 break;
1304 }
1305 }
1306
1307 // the port couldn't find an aggregator - attach it to a new aggregator
1308 if (!found) {
1309 if (free_aggregator) {
1310 // assign port a new aggregator
1311 port->aggregator = free_aggregator;
128ea6c3
BD		 1312 port->actor_port_aggregator_identifier =
1313 port->aggregator->aggregator_identifier;
1da177e4
LT		 1314
1315 // update the new aggregator's parameters
1316 // if port was responsed from the end-user
7bfc4753
BD		 1317 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1318 /* if port is full duplex */
1624db7b 1319 port->aggregator->is_individual = false;
7bfc4753 1320 else
1624db7b 1321 port->aggregator->is_individual = true;
1da177e4
LT		 1322
1323 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1324 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
128ea6c3
BD		 1325 port->aggregator->partner_system =
1326 port->partner_oper.system;
1327 port->aggregator->partner_system_priority =
1328 port->partner_oper.system_priority;
1055c9ab 1329 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1330 port->aggregator->receive_state = 1;
1331 port->aggregator->transmit_state = 1;
1332 port->aggregator->lag_ports = port;
1333 port->aggregator->num_of_ports++;
1334
1335 // mark this port as selected
1336 port->sm_vars |= AD_PORT_SELECTED;
1337
a4aee5c8
JP		 1338 pr_debug("Port %d joined LAG %d(new LAG)\n",
1339 port->actor_port_number,
1340 port->aggregator->aggregator_identifier);
1da177e4 1341 } else {
a4aee5c8 1342 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
471cb5a3 1343 port->slave->bond->dev->name,
1da177e4
LT		 1344 port->actor_port_number, port->slave->dev->name);
1345 }
1346 }
1347 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1348 // else set ready=FALSE in all aggregator's ports
1349 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1350
fd989c83
JV		 1351 aggregator = __get_first_agg(port);
1352 ad_agg_selection_logic(aggregator);
1353}
1354
1355/*
1356 * Decide if "agg" is a better choice for the new active aggregator that
1357 * the current best, according to the ad_select policy.
1358 */
1359static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1360 struct aggregator *curr)
1361{
1362 /*
1363 * 0. If no best, select current.
1364 *
1365 * 1. If the current agg is not individual, and the best is
1366 * individual, select current.
1367 *
1368 * 2. If current agg is individual and the best is not, keep best.
1369 *
1370 * 3. Therefore, current and best are both individual or both not
1371 * individual, so:
1372 *
1373 * 3a. If current agg partner replied, and best agg partner did not,
1374 * select current.
1375 *
1376 * 3b. If current agg partner did not reply and best agg partner
1377 * did reply, keep best.
1378 *
1379 * 4. Therefore, current and best both have partner replies or
1380 * both do not, so perform selection policy:
1381 *
1382 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1383 * select by bandwidth.
1384 *
1385 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1386 */
1387 if (!best)
1388 return curr;
1389
1390 if (!curr->is_individual && best->is_individual)
1391 return curr;
1392
1393 if (curr->is_individual && !best->is_individual)
1394 return best;
1395
1396 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1397 return curr;
1398
1399 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1400 return best;
1401
1402 switch (__get_agg_selection_mode(curr->lag_ports)) {
1403 case BOND_AD_COUNT:
1404 if (curr->num_of_ports > best->num_of_ports)
1405 return curr;
1406
1407 if (curr->num_of_ports < best->num_of_ports)
1408 return best;
1409
1410 /*FALLTHROUGH*/
1411 case BOND_AD_STABLE:
1412 case BOND_AD_BANDWIDTH:
1413 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1414 return curr;
1415
1416 break;
1417
1418 default:
a4aee5c8 1419 pr_warning("%s: Impossible agg select mode %d\n",
471cb5a3 1420 curr->slave->bond->dev->name,
e5e2a8fd 1421 __get_agg_selection_mode(curr->lag_ports));
fd989c83 1422 break;
1da177e4 1423 }
fd989c83
JV		 1424
1425 return best;
1da177e4
LT		 1426}
1427
4cd6fe1c
SH		 1428static int agg_device_up(const struct aggregator *agg)
1429{
2430af8b
JB		 1430 struct port *port = agg->lag_ports;
1431 if (!port)
1432 return 0;
1433 return (netif_running(port->slave->dev) &&
1434 netif_carrier_ok(port->slave->dev));
4cd6fe1c
SH		 1435}
1436
1da177e4
LT		 1437/**
1438 * ad_agg_selection_logic - select an aggregation group for a team
1439 * @aggregator: the aggregator we're looking at
1440 *
1441 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1442 *
1443 * The logic of this function is to select the aggregator according to
1444 * the ad_select policy:
1445 *
1446 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1447 * it, and to reselect the active aggregator only if the previous
1448 * aggregator has no more ports related to it.
1449 *
1450 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1451 * bandwidth, and reselect whenever a link state change takes place or the
1452 * set of slaves in the bond changes.
1453 *
1454 * BOND_AD_COUNT: select the aggregator with largest number of ports
1455 * (slaves), and reselect whenever a link state change takes place or the
1456 * set of slaves in the bond changes.
1da177e4
LT		 1457 *
1458 * FIXME: this function MUST be called with the first agg in the bond, or
1459 * __get_active_agg() won't work correctly. This function should be better
1460 * called with the bond itself, and retrieve the first agg from it.
1461 */
fd989c83 1462static void ad_agg_selection_logic(struct aggregator *agg)
1da177e4 1463{
fd989c83 1464 struct aggregator *best, *active, *origin;
bef1fcce
VF		 1465 struct bonding *bond = agg->slave->bond;
1466 struct list_head *iter;
1467 struct slave *slave;
1da177e4 1468 struct port *port;
1da177e4 1469
fd989c83 1470 origin = agg;
fd989c83 1471 active = __get_active_agg(agg);
4cd6fe1c 1472 best = (active && agg_device_up(active)) ? active : NULL;
1da177e4 1473
bef1fcce
VF		 1474 bond_for_each_slave(bond, slave, iter) {
1475 agg = &(SLAVE_AD_INFO(slave).aggregator);
1476
fd989c83
JV		 1477 agg->is_active = 0;
1478
4cd6fe1c 1479 if (agg->num_of_ports && agg_device_up(agg))
fd989c83 1480 best = ad_agg_selection_test(best, agg);
bef1fcce 1481 }
fd989c83
JV		 1482
1483 if (best &&
1484 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1485 /*
1486 * For the STABLE policy, don't replace the old active
1487 * aggregator if it's still active (it has an answering
1488 * partner) or if both the best and active don't have an
1489 * answering partner.
1490 */
1491 if (active && active->lag_ports &&
1492 active->lag_ports->is_enabled &&
1493 (__agg_has_partner(active) ||
1494 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1495 if (!(!active->actor_oper_aggregator_key &&
1496 best->actor_oper_aggregator_key)) {
1497 best = NULL;
1498 active->is_active = 1;
1da177e4
LT		 1499 }
1500 }
fd989c83 1501 }
1da177e4 1502
fd989c83
JV		 1503 if (best && (best == active)) {
1504 best = NULL;
1505 active->is_active = 1;
1da177e4
LT		 1506 }
1507
1508 // if there is new best aggregator, activate it
fd989c83 1509 if (best) {
5a03cdb7 1510 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1511 best->aggregator_identifier, best->num_of_ports,
1512 best->actor_oper_aggregator_key,
1513 best->partner_oper_aggregator_key,
1514 best->is_individual, best->is_active);
5a03cdb7 1515 pr_debug("best ports %p slave %p %s\n",
a4aee5c8
JP		 1516 best->lag_ports, best->slave,
1517 best->slave ? best->slave->dev->name : "NULL");
fd989c83 1518
bef1fcce
VF		 1519 bond_for_each_slave(bond, slave, iter) {
1520 agg = &(SLAVE_AD_INFO(slave).aggregator);
fd989c83 1521
5a03cdb7 1522 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1523 agg->aggregator_identifier, agg->num_of_ports,
1524 agg->actor_oper_aggregator_key,
1525 agg->partner_oper_aggregator_key,
1526 agg->is_individual, agg->is_active);
1da177e4
LT		 1527 }
1528
1529 // check if any partner replys
fd989c83 1530 if (best->is_individual) {
a4aee5c8 1531 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
471cb5a3 1532 best->slave ? best->slave->bond->dev->name : "NULL");
1da177e4
LT		 1533 }
1534
fd989c83 1535 best->is_active = 1;
5a03cdb7 1536 pr_debug("LAG %d chosen as the active LAG\n",
a4aee5c8 1537 best->aggregator_identifier);
5a03cdb7 1538 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
a4aee5c8
JP		 1539 best->aggregator_identifier, best->num_of_ports,
1540 best->actor_oper_aggregator_key,
1541 best->partner_oper_aggregator_key,
1542 best->is_individual, best->is_active);
1da177e4
LT		 1543
1544 // disable the ports that were related to the former active_aggregator
fd989c83
JV		 1545 if (active) {
1546 for (port = active->lag_ports; port;
1547 port = port->next_port_in_aggregator) {
1da177e4
LT		 1548 __disable_port(port);
1549 }
1550 }
1551 }
1552
fd989c83
JV		 1553 /*
1554 * if the selected aggregator is of join individuals
1555 * (partner_system is NULL), enable their ports
1556 */
1557 active = __get_active_agg(origin);
1da177e4 1558
fd989c83
JV		 1559 if (active) {
1560 if (!__agg_has_partner(active)) {
1561 for (port = active->lag_ports; port;
1562 port = port->next_port_in_aggregator) {
1da177e4
LT		 1563 __enable_port(port);
1564 }
1565 }
1566 }
fd989c83 1567
bef1fcce 1568 bond_3ad_set_carrier(bond);
1da177e4
LT		 1569}
1570
1571/**
1572 * ad_clear_agg - clear a given aggregator's parameters
1573 * @aggregator: the aggregator we're looking at
1574 *
1575 */
1576static void ad_clear_agg(struct aggregator *aggregator)
1577{
1578 if (aggregator) {
1624db7b 1579 aggregator->is_individual = false;
1da177e4
LT		 1580 aggregator->actor_admin_aggregator_key = 0;
1581 aggregator->actor_oper_aggregator_key = 0;
1582 aggregator->partner_system = null_mac_addr;
1583 aggregator->partner_system_priority = 0;
1584 aggregator->partner_oper_aggregator_key = 0;
1585 aggregator->receive_state = 0;
1586 aggregator->transmit_state = 0;
1587 aggregator->lag_ports = NULL;
1588 aggregator->is_active = 0;
1589 aggregator->num_of_ports = 0;
a4aee5c8
JP		 1590 pr_debug("LAG %d was cleared\n",
1591 aggregator->aggregator_identifier);
1da177e4
LT		 1592 }
1593}
1594
1595/**
1596 * ad_initialize_agg - initialize a given aggregator's parameters
1597 * @aggregator: the aggregator we're looking at
1598 *
1599 */
1600static void ad_initialize_agg(struct aggregator *aggregator)
1601{
1602 if (aggregator) {
1603 ad_clear_agg(aggregator);
1604
1605 aggregator->aggregator_mac_address = null_mac_addr;
1606 aggregator->aggregator_identifier = 0;
1607 aggregator->slave = NULL;
1608 }
1609}
1610
1611/**
1612 * ad_initialize_port - initialize a given port's parameters
1613 * @aggregator: the aggregator we're looking at
1614 * @lacp_fast: boolean. whether fast periodic should be used
1615 *
1616 */
1617static void ad_initialize_port(struct port *port, int lacp_fast)
1618{
c7e703d0
HE		 1619 static const struct port_params tmpl = {
1620 .system_priority = 0xffff,
1621 .key = 1,
1622 .port_number = 1,
1623 .port_priority = 0xff,
1624 .port_state = 1,
1625 };
7addeef6
HE		 1626 static const struct lacpdu lacpdu = {
1627 .subtype = 0x01,
1628 .version_number = 0x01,
1629 .tlv_type_actor_info = 0x01,
1630 .actor_information_length = 0x14,
1631 .tlv_type_partner_info = 0x02,
1632 .partner_information_length = 0x14,
1633 .tlv_type_collector_info = 0x03,
1634 .collector_information_length = 0x10,
1635 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1636 };
c7e703d0 1637
1da177e4
LT		 1638 if (port) {
1639 port->actor_port_number = 1;
1640 port->actor_port_priority = 0xff;
1641 port->actor_system = null_mac_addr;
1642 port->actor_system_priority = 0xffff;
1643 port->actor_port_aggregator_identifier = 0;
d238d458 1644 port->ntt = false;
1da177e4
LT		 1645 port->actor_admin_port_key = 1;
1646 port->actor_oper_port_key = 1;
1647 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1648 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1649
7bfc4753 1650 if (lacp_fast)
1da177e4 1651 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1da177e4 1652
c7e703d0
HE		 1653 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1654 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1655
f48127b6 1656 port->is_enabled = true;
1da177e4
LT		 1657 // ****** private parameters ******
1658 port->sm_vars = 0x3;
1659 port->sm_rx_state = 0;
1660 port->sm_rx_timer_counter = 0;
1661 port->sm_periodic_state = 0;
1662 port->sm_periodic_timer_counter = 0;
1663 port->sm_mux_state = 0;
1664 port->sm_mux_timer_counter = 0;
1665 port->sm_tx_state = 0;
1666 port->sm_tx_timer_counter = 0;
1667 port->slave = NULL;
1668 port->aggregator = NULL;
1669 port->next_port_in_aggregator = NULL;
1670 port->transaction_id = 0;
1671
7addeef6 1672 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1da177e4
LT		 1673 }
1674}
1675
1676/**
1677 * ad_enable_collecting_distributing - enable a port's transmit/receive
1678 * @port: the port we're looking at
1679 *
1680 * Enable @port if it's in an active aggregator
1681 */
1682static void ad_enable_collecting_distributing(struct port *port)
1683{
1684 if (port->aggregator->is_active) {
a4aee5c8
JP		 1685 pr_debug("Enabling port %d(LAG %d)\n",
1686 port->actor_port_number,
1687 port->aggregator->aggregator_identifier);
1da177e4
LT		 1688 __enable_port(port);
1689 }
1690}
1691
1692/**
1693 * ad_disable_collecting_distributing - disable a port's transmit/receive
1694 * @port: the port we're looking at
1695 *
1696 */
1697static void ad_disable_collecting_distributing(struct port *port)
1698{
1699 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
a4aee5c8
JP		 1700 pr_debug("Disabling port %d(LAG %d)\n",
1701 port->actor_port_number,
1702 port->aggregator->aggregator_identifier);
1da177e4
LT		 1703 __disable_port(port);
1704 }
1705}
1706
1707#if 0
1708/**
1709 * ad_marker_info_send - send a marker information frame
1710 * @port: the port we're looking at
1711 *
1712 * This function does nothing since we decided not to implement send and handle
1713 * response for marker PDU's, in this stage, but only to respond to marker
1714 * information.
1715 */
1716static void ad_marker_info_send(struct port *port)
1717{
1c3f0b8e 1718 struct bond_marker marker;
1da177e4
LT		 1719 u16 index;
1720
1721 // fill the marker PDU with the appropriate values
1722 marker.subtype = 0x02;
1723 marker.version_number = 0x01;
1724 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1725 marker.marker_length = 0x16;
1726 // convert requester_port to Big Endian
1727 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1728 marker.requester_system = port->actor_system;
1729 // convert requester_port(u32) to Big Endian
128ea6c3
BD		 1730 marker.requester_transaction_id =
1731 (((++port->transaction_id & 0xFF) << 24)
1732 | ((port->transaction_id & 0xFF00) << 8)
1733 | ((port->transaction_id & 0xFF0000) >> 8)
1734 | ((port->transaction_id & 0xFF000000) >> 24));
1da177e4
LT		 1735 marker.pad = 0;
1736 marker.tlv_type_terminator = 0x00;
1737 marker.terminator_length = 0x00;
128ea6c3
BD		 1738 for (index = 0; index < 90; index++)
1739 marker.reserved_90[index] = 0;
1da177e4
LT		 1740
1741 // send the marker information
1742 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1743 pr_debug("Sent Marker Information on port %d\n",
1744 port->actor_port_number);
1da177e4
LT		 1745 }
1746}
1747#endif
1748
1749/**
1750 * ad_marker_info_received - handle receive of a Marker information frame
1751 * @marker_info: Marker info received
1752 * @port: the port we're looking at
1753 *
1754 */
1c3f0b8e
MD		 1755static void ad_marker_info_received(struct bond_marker *marker_info,
1756 struct port *port)
1da177e4 1757{
1c3f0b8e 1758 struct bond_marker marker;
1da177e4
LT		 1759
1760 // copy the received marker data to the response marker
1761 //marker = *marker_info;
1c3f0b8e 1762 memcpy(&marker, marker_info, sizeof(struct bond_marker));
1da177e4 1763 // change the marker subtype to marker response
128ea6c3 1764 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1da177e4
LT		 1765 // send the marker response
1766
1767 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1768 pr_debug("Sent Marker Response on port %d\n",
1769 port->actor_port_number);
1da177e4
LT		 1770 }
1771}
1772
1773/**
1774 * ad_marker_response_received - handle receive of a marker response frame
1775 * @marker: marker PDU received
1776 * @port: the port we're looking at
1777 *
1778 * This function does nothing since we decided not to implement send and handle
1779 * response for marker PDU's, in this stage, but only to respond to marker
1780 * information.
1781 */
1c3f0b8e
MD		 1782static void ad_marker_response_received(struct bond_marker *marker,
1783 struct port *port)
1da177e4 1784{
128ea6c3
BD		 1785 marker = NULL; /* just to satisfy the compiler */
1786 port = NULL; /* just to satisfy the compiler */
1da177e4
LT		 1787 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1788}
1789
1da177e4
LT		 1790//////////////////////////////////////////////////////////////////////////////////////
1791// ================= AD exported functions to the main bonding code ==================
1792//////////////////////////////////////////////////////////////////////////////////////
1793
1794// Check aggregators status in team every T seconds
1795#define AD_AGGREGATOR_SELECTION_TIMER 8
1796
fd989c83
JV		 1797/*
1798 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1799 *
1800 * Set the aggregation selection timer, to initiate an agg selection in
1801 * the very near future. Called during first initialization, and during
1802 * any down to up transitions of the bond.
1803 */
1804void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1805{
1806 BOND_AD_INFO(bond).agg_select_timer = timeout;
fd989c83
JV		 1807}
1808
1da177e4
LT		 1809static u16 aggregator_identifier;
1810
1811/**
1812 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1813 * @bond: bonding struct to work on
1814 * @tick_resolution: tick duration (millisecond resolution)
1da177e4
LT		 1815 *
1816 * Can be called only after the mac address of the bond is set.
1817 */
56d00c67 1818void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
3a6d54c5 1819{
1da177e4 1820 // check that the bond is not initialized yet
3a6d54c5
JP		 1821 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1822 bond->dev->dev_addr)) {
1da177e4
LT		 1823
1824 aggregator_identifier = 0;
1825
1da177e4
LT		 1826 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1827 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1828
1829 // initialize how many times this module is called in one second(should be about every 100ms)
1830 ad_ticks_per_sec = tick_resolution;
1831
fd989c83
JV		 1832 bond_3ad_initiate_agg_selection(bond,
1833 AD_AGGREGATOR_SELECTION_TIMER *
1834 ad_ticks_per_sec);
1da177e4
LT		 1835 }
1836}
1837
1838/**
1839 * bond_3ad_bind_slave - initialize a slave's port
1840 * @slave: slave struct to work on
1841 *
1842 * Returns: 0 on success
1843 * < 0 on error
1844 */
1845int bond_3ad_bind_slave(struct slave *slave)
1846{
1847 struct bonding *bond = bond_get_bond_by_slave(slave);
1848 struct port *port;
1849 struct aggregator *aggregator;
1850
1851 if (bond == NULL) {
a4aee5c8 1852 pr_err("%s: The slave %s is not attached to its bond\n",
471cb5a3 1853 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 1854 return -1;
1855 }
1856
b595076a 1857 //check that the slave has not been initialized yet.
1da177e4
LT		 1858 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1859
1860 // port initialization
1861 port = &(SLAVE_AD_INFO(slave).port);
1862
bf0239a9 1863 ad_initialize_port(port, bond->params.lacp_fast);
1da177e4 1864
e0809dbc 1865 __initialize_port_locks(slave);
1da177e4
LT		 1866 port->slave = slave;
1867 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1868 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1869 // ------------------------------------------------------------
1870 // Port key : | User key | Speed |Duplex|
1871 // ------------------------------------------------------------
1872 // 16 6 1 0
1873 port->actor_admin_port_key = 0; // initialize this parameter
1874 port->actor_admin_port_key |= __get_duplex(port);
1875 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1876 port->actor_oper_port_key = port->actor_admin_port_key;
1877 // if the port is not full duplex, then the port should be not lacp Enabled
7bfc4753 1878 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
1da177e4 1879 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
1da177e4
LT		 1880 // actor system is the bond's system
1881 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1882 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1883 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1884 port->aggregator = NULL;
1885 port->next_port_in_aggregator = NULL;
1886
1887 __disable_port(port);
1da177e4
LT		 1888
1889 // aggregator initialization
1890 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1891
1892 ad_initialize_agg(aggregator);
1893
1894 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1895 aggregator->aggregator_identifier = (++aggregator_identifier);
1896 aggregator->slave = slave;
1897 aggregator->is_active = 0;
1898 aggregator->num_of_ports = 0;
1899 }
1900
1901 return 0;
1902}
1903
1904/**
1905 * bond_3ad_unbind_slave - deinitialize a slave's port
1906 * @slave: slave struct to work on
1907 *
1908 * Search for the aggregator that is related to this port, remove the
1909 * aggregator and assign another aggregator for other port related to it
1910 * (if any), and remove the port.
1911 */
1912void bond_3ad_unbind_slave(struct slave *slave)
1913{
1914 struct port *port, *prev_port, *temp_port;
1915 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1916 int select_new_active_agg = 0;
0b088264
VF		 1917 struct bonding *bond = slave->bond;
1918 struct slave *slave_iter;
1919 struct list_head *iter;
a361c83c 1920
1da177e4
LT		 1921 // find the aggregator related to this slave
1922 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1923
1924 // find the port related to this slave
1925 port = &(SLAVE_AD_INFO(slave).port);
1926
1927 // if slave is null, the whole port is not initialized
1928 if (!port->slave) {
a4aee5c8 1929 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
471cb5a3 1930 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 1931 return;
1932 }
1933
a4aee5c8
JP		 1934 pr_debug("Unbinding Link Aggregation Group %d\n",
1935 aggregator->aggregator_identifier);
1da177e4
LT		 1936
1937 /* Tell the partner that this port is not suitable for aggregation */
1938 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1939 __update_lacpdu_from_port(port);
1940 ad_lacpdu_send(port);
1941
1942 // check if this aggregator is occupied
1943 if (aggregator->lag_ports) {
1944 // check if there are other ports related to this aggregator except
1945 // the port related to this slave(thats ensure us that there is a
1946 // reason to search for new aggregator, and that we will find one
1947 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
1948 // find new aggregator for the related port(s)
0b088264
VF		 1949 bond_for_each_slave(bond, slave_iter, iter) {
1950 new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
fd589a8f 1951 // if the new aggregator is empty, or it is connected to our port only
7bfc4753
BD		 1952 if (!new_aggregator->lag_ports
1953 || ((new_aggregator->lag_ports == port)
1954 && !new_aggregator->lag_ports->next_port_in_aggregator))
1da177e4 1955 break;
1da177e4 1956 }
0b088264
VF		 1957 if (!slave_iter)
1958 new_aggregator = NULL;
1da177e4
LT		 1959 // if new aggregator found, copy the aggregator's parameters
1960 // and connect the related lag_ports to the new aggregator
1961 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
a4aee5c8
JP		 1962 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
1963 aggregator->aggregator_identifier,
1964 new_aggregator->aggregator_identifier);
1da177e4
LT		 1965
1966 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
a4aee5c8 1967 pr_info("%s: Removing an active aggregator\n",
471cb5a3 1968 aggregator->slave->bond->dev->name);
1da177e4
LT		 1969 // select new active aggregator
1970 select_new_active_agg = 1;
1971 }
1972
1973 new_aggregator->is_individual = aggregator->is_individual;
1974 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
1975 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
1976 new_aggregator->partner_system = aggregator->partner_system;
1977 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
1978 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
1979 new_aggregator->receive_state = aggregator->receive_state;
1980 new_aggregator->transmit_state = aggregator->transmit_state;
1981 new_aggregator->lag_ports = aggregator->lag_ports;
1982 new_aggregator->is_active = aggregator->is_active;
1983 new_aggregator->num_of_ports = aggregator->num_of_ports;
1984
1985 // update the information that is written on the ports about the aggregator
128ea6c3
BD		 1986 for (temp_port = aggregator->lag_ports; temp_port;
1987 temp_port = temp_port->next_port_in_aggregator) {
1988 temp_port->aggregator = new_aggregator;
1da177e4
LT		 1989 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
1990 }
1991
1992 // clear the aggregator
1993 ad_clear_agg(aggregator);
a361c83c 1994
7bfc4753 1995 if (select_new_active_agg)
1da177e4 1996 ad_agg_selection_logic(__get_first_agg(port));
1da177e4 1997 } else {
a4aee5c8 1998 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
471cb5a3 1999 slave->bond->dev->name);
1da177e4
LT		 2000 }
2001 } else { // in case that the only port related to this aggregator is the one we want to remove
2002 select_new_active_agg = aggregator->is_active;
2003 // clear the aggregator
2004 ad_clear_agg(aggregator);
2005 if (select_new_active_agg) {
a4aee5c8 2006 pr_info("%s: Removing an active aggregator\n",
471cb5a3 2007 slave->bond->dev->name);
1da177e4 2008 // select new active aggregator
74684493
VF		 2009 temp_aggregator = __get_first_agg(port);
2010 if (temp_aggregator)
2011 ad_agg_selection_logic(temp_aggregator);
1da177e4
LT		 2012 }
2013 }
2014 }
2015
5a03cdb7 2016 pr_debug("Unbinding port %d\n", port->actor_port_number);
1da177e4 2017 // find the aggregator that this port is connected to
0b088264
VF		 2018 bond_for_each_slave(bond, slave_iter, iter) {
2019 temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator);
1da177e4
LT		 2020 prev_port = NULL;
2021 // search the port in the aggregator's related ports
128ea6c3
BD		 2022 for (temp_port = temp_aggregator->lag_ports; temp_port;
2023 prev_port = temp_port,
2024 temp_port = temp_port->next_port_in_aggregator) {
1da177e4 2025 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
7bfc4753 2026 if (prev_port)
1da177e4 2027 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
7bfc4753 2028 else
1da177e4 2029 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
1da177e4 2030 temp_aggregator->num_of_ports--;
128ea6c3 2031 if (temp_aggregator->num_of_ports == 0) {
1da177e4
LT		 2032 select_new_active_agg = temp_aggregator->is_active;
2033 // clear the aggregator
2034 ad_clear_agg(temp_aggregator);
2035 if (select_new_active_agg) {
a4aee5c8 2036 pr_info("%s: Removing an active aggregator\n",
471cb5a3 2037 slave->bond->dev->name);
1da177e4
LT		 2038 // select new active aggregator
2039 ad_agg_selection_logic(__get_first_agg(port));
2040 }
2041 }
2042 break;
2043 }
2044 }
2045 }
128ea6c3 2046 port->slave = NULL;
1da177e4
LT		 2047}
2048
2049/**
2050 * bond_3ad_state_machine_handler - handle state machines timeout
2051 * @bond: bonding struct to work on
2052 *
2053 * The state machine handling concept in this module is to check every tick
2054 * which state machine should operate any function. The execution order is
2055 * round robin, so when we have an interaction between state machines, the
2056 * reply of one to each other might be delayed until next tick.
2057 *
2058 * This function also complete the initialization when the agg_select_timer
2059 * times out, and it selects an aggregator for the ports that are yet not
2060 * related to any aggregator, and selects the active aggregator for a bond.
2061 */
1b76b316 2062void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2063{
1b76b316
JV		 2064 struct bonding *bond = container_of(work, struct bonding,
2065 ad_work.work);
1da177e4 2066 struct aggregator *aggregator;
3c4c88a1
VF		 2067 struct list_head *iter;
2068 struct slave *slave;
2069 struct port *port;
1da177e4 2070
1f2cd845
DM		 2071 read_lock(&bond->lock);
2072
1da177e4 2073 //check if there are any slaves
0965a1f3 2074 if (!bond_has_slaves(bond))
1da177e4 2075 goto re_arm;
1da177e4
LT		 2076
2077 // check if agg_select_timer timer after initialize is timed out
2078 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
fe9323da
VF		 2079 slave = bond_first_slave(bond);
2080 port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL;
2081
1da177e4 2082 // select the active aggregator for the bond
fe9323da 2083 if (port) {
1da177e4 2084 if (!port->slave) {
a4aee5c8
JP		 2085 pr_warning("%s: Warning: bond's first port is uninitialized\n",
2086 bond->dev->name);
1da177e4
LT		 2087 goto re_arm;
2088 }
2089
2090 aggregator = __get_first_agg(port);
2091 ad_agg_selection_logic(aggregator);
2092 }
f0c76d61 2093 bond_3ad_set_carrier(bond);
1da177e4
LT		 2094 }
2095
2096 // for each port run the state machines
3c4c88a1
VF		 2097 bond_for_each_slave(bond, slave, iter) {
2098 port = &(SLAVE_AD_INFO(slave).port);
1da177e4 2099 if (!port->slave) {
a4aee5c8
JP		 2100 pr_warning("%s: Warning: Found an uninitialized port\n",
2101 bond->dev->name);
1da177e4
LT		 2102 goto re_arm;
2103 }
2104
16d79d7d
NC		 2105 /* Lock around state machines to protect data accessed
2106 * by all (e.g., port->sm_vars). ad_rx_machine may run
2107 * concurrently due to incoming LACPDU.
2108 */
9ac3524a 2109 __get_state_machine_lock(port);
16d79d7d 2110
1da177e4
LT		 2111 ad_rx_machine(NULL, port);
2112 ad_periodic_machine(port);
2113 ad_port_selection_logic(port);
2114 ad_mux_machine(port);
2115 ad_tx_machine(port);
2116
2117 // turn off the BEGIN bit, since we already handled it
7bfc4753 2118 if (port->sm_vars & AD_PORT_BEGIN)
1da177e4 2119 port->sm_vars &= ~AD_PORT_BEGIN;
16d79d7d 2120
9ac3524a 2121 __release_state_machine_lock(port);
1da177e4
LT		 2122 }
2123
2124re_arm:
e6d265e8 2125 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1f2cd845
DM		 2126
2127 read_unlock(&bond->lock);
1da177e4
LT		 2128}
2129
2130/**
2131 * bond_3ad_rx_indication - handle a received frame
2132 * @lacpdu: received lacpdu
2133 * @slave: slave struct to work on
2134 * @length: length of the data received
2135 *
2136 * It is assumed that frames that were sent on this NIC don't returned as new
2137 * received frames (loopback). Since only the payload is given to this
2138 * function, it check for loopback.
2139 */
13a8e0c8 2140static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
1da177e4
LT		 2141{
2142 struct port *port;
13a8e0c8 2143 int ret = RX_HANDLER_ANOTHER;
1da177e4
LT		 2144
2145 if (length >= sizeof(struct lacpdu)) {
2146
2147 port = &(SLAVE_AD_INFO(slave).port);
2148
2149 if (!port->slave) {
a4aee5c8 2150 pr_warning("%s: Warning: port of slave %s is uninitialized\n",
471cb5a3 2151 slave->dev->name, slave->bond->dev->name);
13a8e0c8 2152 return ret;
1da177e4
LT		 2153 }
2154
2155 switch (lacpdu->subtype) {
2156 case AD_TYPE_LACPDU:
13a8e0c8 2157 ret = RX_HANDLER_CONSUMED;
a4aee5c8
JP		 2158 pr_debug("Received LACPDU on port %d\n",
2159 port->actor_port_number);
16d79d7d 2160 /* Protect against concurrent state machines */
9ac3524a 2161 __get_state_machine_lock(port);
1da177e4 2162 ad_rx_machine(lacpdu, port);
9ac3524a 2163 __release_state_machine_lock(port);
1da177e4
LT		 2164 break;
2165
2166 case AD_TYPE_MARKER:
13a8e0c8 2167 ret = RX_HANDLER_CONSUMED;
1da177e4
LT		 2168 // No need to convert fields to Little Endian since we don't use the marker's fields.
2169
1c3f0b8e 2170 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2171 case AD_MARKER_INFORMATION_SUBTYPE:
a4aee5c8
JP		 2172 pr_debug("Received Marker Information on port %d\n",
2173 port->actor_port_number);
1c3f0b8e 2174 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2175 break;
2176
2177 case AD_MARKER_RESPONSE_SUBTYPE:
a4aee5c8
JP		 2178 pr_debug("Received Marker Response on port %d\n",
2179 port->actor_port_number);
1c3f0b8e 2180 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2181 break;
2182
2183 default:
a4aee5c8
JP		 2184 pr_debug("Received an unknown Marker subtype on slot %d\n",
2185 port->actor_port_number);
1da177e4
LT		 2186 }
2187 }
2188 }
13a8e0c8 2189 return ret;
1da177e4
LT		 2190}
2191
2192/**
2193 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2194 * @slave: slave struct to work on
2195 *
2196 * Handle reselection of aggregator (if needed) for this port.
2197 */
2198void bond_3ad_adapter_speed_changed(struct slave *slave)
2199{
2200 struct port *port;
2201
2202 port = &(SLAVE_AD_INFO(slave).port);
2203
71a06c59 2204 /* if slave is null, the whole port is not initialized */
1da177e4 2205 if (!port->slave) {
a4aee5c8 2206 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
471cb5a3 2207 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2208 return;
2209 }
2210
71a06c59 2211 __get_state_machine_lock(port);
2212
1da177e4 2213 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2214 port->actor_oper_port_key = port->actor_admin_port_key |=
2215 (__get_link_speed(port) << 1);
5a03cdb7 2216 pr_debug("Port %d changed speed\n", port->actor_port_number);
71a06c59 2217 /* there is no need to reselect a new aggregator, just signal the
2218 * state machines to reinitialize
2219 */
1da177e4 2220 port->sm_vars |= AD_PORT_BEGIN;
71a06c59 2221
2222 __release_state_machine_lock(port);
1da177e4
LT		 2223}
2224
2225/**
2226 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2227 * @slave: slave struct to work on
2228 *
2229 * Handle reselection of aggregator (if needed) for this port.
2230 */
2231void bond_3ad_adapter_duplex_changed(struct slave *slave)
2232{
2233 struct port *port;
2234
128ea6c3 2235 port = &(SLAVE_AD_INFO(slave).port);
1da177e4 2236
bca44a73 2237 /* if slave is null, the whole port is not initialized */
1da177e4 2238 if (!port->slave) {
a4aee5c8 2239 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
471cb5a3 2240 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2241 return;
2242 }
2243
bca44a73 2244 __get_state_machine_lock(port);
2245
1da177e4 2246 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2247 port->actor_oper_port_key = port->actor_admin_port_key |=
2248 __get_duplex(port);
5a03cdb7 2249 pr_debug("Port %d changed duplex\n", port->actor_port_number);
bca44a73 2250 /* there is no need to reselect a new aggregator, just signal the
2251 * state machines to reinitialize
2252 */
1da177e4 2253 port->sm_vars |= AD_PORT_BEGIN;
bca44a73 2254
2255 __release_state_machine_lock(port);
1da177e4
LT		 2256}
2257
2258/**
2259 * bond_3ad_handle_link_change - handle a slave's link status change indication
2260 * @slave: slave struct to work on
2261 * @status: whether the link is now up or down
2262 *
2263 * Handle reselection of aggregator (if needed) for this port.
2264 */
2265void bond_3ad_handle_link_change(struct slave *slave, char link)
2266{
2267 struct port *port;
2268
2269 port = &(SLAVE_AD_INFO(slave).port);
2270
2271 // if slave is null, the whole port is not initialized
2272 if (!port->slave) {
a4aee5c8 2273 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
471cb5a3 2274 slave->bond->dev->name, slave->dev->name);
1da177e4
LT		 2275 return;
2276 }
2277
2278 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
2279 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2280 if (link == BOND_LINK_UP) {
f48127b6 2281 port->is_enabled = true;
1da177e4 2282 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2283 port->actor_oper_port_key = port->actor_admin_port_key |=
2284 __get_duplex(port);
1da177e4 2285 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
128ea6c3
BD		 2286 port->actor_oper_port_key = port->actor_admin_port_key |=
2287 (__get_link_speed(port) << 1);
1da177e4
LT		 2288 } else {
2289 /* link has failed */
f48127b6 2290 port->is_enabled = false;
1da177e4 2291 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
128ea6c3
BD		 2292 port->actor_oper_port_key = (port->actor_admin_port_key &=
2293 ~AD_SPEED_KEY_BITS);
1da177e4
LT		 2294 }
2295 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2296 // there is no need to reselect a new aggregator, just signal the
2297 // state machines to reinitialize
2298 port->sm_vars |= AD_PORT_BEGIN;
2299}
2300
ff59c456 2301/*
a361c83c 2302 * set link state for bonding master: if we have an active
ff59c456
JV		 2303 * aggregator, we're up, if not, we're down. Presumes that we cannot
2304 * have an active aggregator if there are no slaves with link up.
2305 *
031ae4de
JV		 2306 * This behavior complies with IEEE 802.3 section 43.3.9.
2307 *
ff59c456
JV		 2308 * Called by bond_set_carrier(). Return zero if carrier state does not
2309 * change, nonzero if it does.
2310 */
2311int bond_3ad_set_carrier(struct bonding *bond)
2312{
655f8919 2313 struct aggregator *active;
dec1e90e 2314 struct slave *first_slave;
655f8919 2315
dec1e90e 2316 first_slave = bond_first_slave(bond);
2317 if (!first_slave)
2318 return 0;
2319 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator));
655f8919 2320 if (active) {
2321 /* are enough slaves available to consider link up? */
2322 if (active->num_of_ports < bond->params.min_links) {
2323 if (netif_carrier_ok(bond->dev)) {
2324 netif_carrier_off(bond->dev);
2325 return 1;
2326 }
2327 } else if (!netif_carrier_ok(bond->dev)) {
ff59c456
JV		 2328 netif_carrier_on(bond->dev);
2329 return 1;
2330 }
2331 return 0;
2332 }
2333
2334 if (netif_carrier_ok(bond->dev)) {
2335 netif_carrier_off(bond->dev);
2336 return 1;
2337 }
2338 return 0;
2339}
2340
1da177e4 2341/**
318debd8 2342 * __bond_3ad_get_active_agg_info - get information of the active aggregator
1da177e4
LT		 2343 * @bond: bonding struct to work on
2344 * @ad_info: ad_info struct to fill with the bond's info
2345 *
2346 * Returns: 0 on success
2347 * < 0 on error
2348 */
318debd8 2349int __bond_3ad_get_active_agg_info(struct bonding *bond,
2350 struct ad_info *ad_info)
1da177e4
LT		 2351{
2352 struct aggregator *aggregator = NULL;
3c4c88a1
VF		 2353 struct list_head *iter;
2354 struct slave *slave;
1da177e4
LT		 2355 struct port *port;
2356
47e91f56 2357 bond_for_each_slave_rcu(bond, slave, iter) {
3c4c88a1 2358 port = &(SLAVE_AD_INFO(slave).port);
1da177e4
LT		 2359 if (port->aggregator && port->aggregator->is_active) {
2360 aggregator = port->aggregator;
2361 break;
2362 }
2363 }
2364
2365 if (aggregator) {
2366 ad_info->aggregator_id = aggregator->aggregator_identifier;
2367 ad_info->ports = aggregator->num_of_ports;
2368 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2369 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2370 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2371 return 0;
2372 }
2373
2374 return -1;
2375}
2376
318debd8 2377/* Wrapper used to hold bond->lock so no slave manipulation can occur */
2378int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2379{
2380 int ret;
2381
47e91f56 2382 rcu_read_lock();
318debd8 2383 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
47e91f56 2384 rcu_read_unlock();
318debd8 2385
2386 return ret;
2387}
2388
1da177e4
LT		 2389int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2390{
454d7c9b 2391 struct bonding *bond = netdev_priv(dev);
c33d7887
VF		 2392 struct slave *slave, *first_ok_slave;
2393 struct aggregator *agg;
2394 struct ad_info ad_info;
9caff1e7 2395 struct list_head *iter;
1da177e4 2396 int slaves_in_agg;
c33d7887 2397 int slave_agg_no;
1da177e4 2398 int res = 1;
c33d7887 2399 int agg_id;
1da177e4 2400
318debd8 2401 if (__bond_3ad_get_active_agg_info(bond, &ad_info)) {
2402 pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n",
a4aee5c8 2403 dev->name);
1da177e4
LT		 2404 goto out;
2405 }
2406
2407 slaves_in_agg = ad_info.ports;
2408 agg_id = ad_info.aggregator_id;
2409
2410 if (slaves_in_agg == 0) {
a4aee5c8 2411 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
1da177e4
LT		 2412 goto out;
2413 }
2414
32819dc1 2415 slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg);
c33d7887 2416 first_ok_slave = NULL;
1da177e4 2417
47e91f56 2418 bond_for_each_slave_rcu(bond, slave, iter) {
c33d7887
VF		 2419 agg = SLAVE_AD_INFO(slave).port.aggregator;
2420 if (!agg || agg->aggregator_identifier != agg_id)
2421 continue;
1da177e4 2422
c33d7887
VF		 2423 if (slave_agg_no >= 0) {
2424 if (!first_ok_slave && SLAVE_IS_OK(slave))
2425 first_ok_slave = slave;
1da177e4 2426 slave_agg_no--;
c33d7887
VF		 2427 continue;
2428 }
2429
2430 if (SLAVE_IS_OK(slave)) {
2431 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2432 goto out;
1da177e4
LT		 2433 }
2434 }
2435
2436 if (slave_agg_no >= 0) {
a4aee5c8
JP		 2437 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2438 dev->name, agg_id);
1da177e4
LT		 2439 goto out;
2440 }
2441
c33d7887
VF		 2442 /* we couldn't find any suitable slave after the agg_no, so use the
2443 * first suitable found, if found. */
2444 if (first_ok_slave)
2445 res = bond_dev_queue_xmit(bond, skb, first_ok_slave->dev);
1da177e4
LT		 2446
2447out:
2448 if (res) {
2449 /* no suitable interface, frame not sent */
04502430 2450 kfree_skb(skb);
1da177e4 2451 }
0693e88e 2452
ec634fe3 2453 return NETDEV_TX_OK;
1da177e4
LT		 2454}
2455
de063b70
ED		 2456int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2457 struct slave *slave)
1da177e4 2458{
13a8e0c8 2459 int ret = RX_HANDLER_ANOTHER;
de063b70
ED		 2460 struct lacpdu *lacpdu, _lacpdu;
2461
3aba891d 2462 if (skb->protocol != PKT_TYPE_LACPDU)
13a8e0c8 2463 return ret;
b3053251 2464
de063b70
ED		 2465 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2466 if (!lacpdu)
13a8e0c8 2467 return ret;
ab12811c 2468
1da177e4 2469 read_lock(&bond->lock);
de063b70 2470 ret = bond_3ad_rx_indication(lacpdu, slave, skb->len);
1da177e4 2471 read_unlock(&bond->lock);
13a8e0c8 2472 return ret;
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{
ba824a8b 2485 struct port *port = NULL;
9caff1e7 2486 struct list_head *iter;
c509316b 2487 struct slave *slave;
ba824a8b
PP		 2488 int lacp_fast;
2489
ba824a8b 2490 lacp_fast = bond->params.lacp_fast;
9caff1e7 2491 bond_for_each_slave(bond, slave, iter) {
ba824a8b
PP		 2492 port = &(SLAVE_AD_INFO(slave).port);
2493 __get_state_machine_lock(port);
2494 if (lacp_fast)
2495 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2496 else
2497 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
2498 __release_state_machine_lock(port);
2499 }
ba824a8b 2500}
Linux kernel - Deliverables
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