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bonding: fix 802.3ad aggregator reselection
[mirror_ubuntu-bionic-kernel.git] / drivers / net / bonding / bond_3ad.c
CommitLineData
1da177e4
LT		 1/*
2 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
7 * any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59
16 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 *
18 * The full GNU General Public License is included in this distribution in the
19 * file called LICENSE.
20 *
1da177e4
LT		 21 */
22
1da177e4
LT		 23#include <linux/skbuff.h>
24#include <linux/if_ether.h>
25#include <linux/netdevice.h>
26#include <linux/spinlock.h>
27#include <linux/ethtool.h>
fd989c83 28#include <linux/etherdevice.h>
1da177e4
LT		 29#include <linux/if_bonding.h>
30#include <linux/pkt_sched.h>
e730c155 31#include <net/net_namespace.h>
1ef8019b
DM		 32#include <net/bonding.h>
33#include <net/bond_3ad.h>
1da177e4 34
3bf2d28a 35/* General definitions */
1da177e4
LT		 36#define AD_SHORT_TIMEOUT 1
37#define AD_LONG_TIMEOUT 0
38#define AD_STANDBY 0x2
39#define AD_MAX_TX_IN_SECOND 3
40#define AD_COLLECTOR_MAX_DELAY 0
41
3bf2d28a 42/* Timer definitions (43.4.4 in the 802.3ad standard) */
1da177e4
LT		 43#define AD_FAST_PERIODIC_TIME 1
44#define AD_SLOW_PERIODIC_TIME 30
45#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
46#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
47#define AD_CHURN_DETECTION_TIME 60
48#define AD_AGGREGATE_WAIT_TIME 2
49
3bf2d28a 50/* Port state definitions (43.4.2.2 in the 802.3ad standard) */
1da177e4
LT		 51#define AD_STATE_LACP_ACTIVITY 0x1
52#define AD_STATE_LACP_TIMEOUT 0x2
53#define AD_STATE_AGGREGATION 0x4
54#define AD_STATE_SYNCHRONIZATION 0x8
55#define AD_STATE_COLLECTING 0x10
56#define AD_STATE_DISTRIBUTING 0x20
57#define AD_STATE_DEFAULTED 0x40
58#define AD_STATE_EXPIRED 0x80
59
3bf2d28a
VF		 60/* Port Variables definitions used by the State Machines (43.4.7 in the
61 * 802.3ad standard)
62 */
1da177e4
LT		 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
ef015d72 73#define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN)
1da177e4 74
3bf2d28a
VF		 75/* Port Key definitions
76 * key is determined according to the link speed, duplex and
77 * user key (which is yet not supported)
d22a5fc0
MB		 78 * --------------------------------------------------------------
79 * Port key | User key (10 bits) | Speed (5 bits) | Duplex|
80 * --------------------------------------------------------------
81 * |15 6|5 1|0
3bf2d28a 82 */
cb8dda90
JX		 83#define AD_DUPLEX_KEY_MASKS 0x1
84#define AD_SPEED_KEY_MASKS 0x3E
85#define AD_USER_KEY_MASKS 0xFFC0
86
87enum ad_link_speed_type {
88 AD_LINK_SPEED_1MBPS = 1,
89 AD_LINK_SPEED_10MBPS,
90 AD_LINK_SPEED_100MBPS,
91 AD_LINK_SPEED_1000MBPS,
424c3232
JX		 92 AD_LINK_SPEED_2500MBPS,
93 AD_LINK_SPEED_10000MBPS,
94 AD_LINK_SPEED_20000MBPS,
95 AD_LINK_SPEED_40000MBPS,
3952af4d
JP		 96 AD_LINK_SPEED_56000MBPS,
97 AD_LINK_SPEED_100000MBPS,
cb8dda90 98};
1da177e4 99
815117ad 100/* compare MAC addresses */
101#define MAC_ADDRESS_EQUAL(A, B) \
102 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
1da177e4 103
128ea6c3 104static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
1da177e4
LT		 105static u16 ad_ticks_per_sec;
106static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
107
e4ac4320
HE		 108static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
109
3bf2d28a 110/* ================= main 802.3ad protocol functions ================== */
1da177e4 111static int ad_lacpdu_send(struct port *port);
1c3f0b8e 112static int ad_marker_send(struct port *port, struct bond_marker *marker);
ee637714 113static void ad_mux_machine(struct port *port, bool *update_slave_arr);
1da177e4
LT		 114static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
115static void ad_tx_machine(struct port *port);
116static void ad_periodic_machine(struct port *port);
ee637714
MB		 117static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
118static void ad_agg_selection_logic(struct aggregator *aggregator,
119 bool *update_slave_arr);
1da177e4
LT		 120static void ad_clear_agg(struct aggregator *aggregator);
121static void ad_initialize_agg(struct aggregator *aggregator);
122static void ad_initialize_port(struct port *port, int lacp_fast);
ee637714
MB		 123static void ad_enable_collecting_distributing(struct port *port,
124 bool *update_slave_arr);
125static void ad_disable_collecting_distributing(struct port *port,
126 bool *update_slave_arr);
3bf2d28a
VF		 127static void ad_marker_info_received(struct bond_marker *marker_info,
128 struct port *port);
129static void ad_marker_response_received(struct bond_marker *marker,
130 struct port *port);
7bb11dc9 131static void ad_update_actor_keys(struct port *port, bool reset);
1da177e4
LT		 132
133
3bf2d28a 134/* ================= api to bonding and kernel code ================== */
1da177e4
LT		 135
136/**
137 * __get_bond_by_port - get the port's bonding struct
138 * @port: the port we're looking at
139 *
140 * Return @port's bonding struct, or %NULL if it can't be found.
141 */
142static inline struct bonding *__get_bond_by_port(struct port *port)
143{
7bfc4753 144 if (port->slave == NULL)
1da177e4 145 return NULL;
1da177e4
LT		 146
147 return bond_get_bond_by_slave(port->slave);
148}
149
1da177e4
LT		 150/**
151 * __get_first_agg - get the first aggregator in the bond
152 * @bond: the bond we're looking at
153 *
154 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
155 * found.
768b9549 156 * The caller must hold RCU or RTNL lock.
1da177e4
LT		 157 */
158static inline struct aggregator *__get_first_agg(struct port *port)
159{
160 struct bonding *bond = __get_bond_by_port(port);
dec1e90e 161 struct slave *first_slave;
768b9549 162 struct aggregator *agg;
1da177e4 163
be79bd04 164 /* If there's no bond for this port, or bond has no slaves */
dec1e90e 165 if (bond == NULL)
1da177e4 166 return NULL;
3bf2d28a 167
be79bd04 168 rcu_read_lock();
169 first_slave = bond_first_slave_rcu(bond);
3fdddd85 170 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
be79bd04 171 rcu_read_unlock();
3bf2d28a 172
768b9549 173 return agg;
1da177e4
LT		 174}
175
3bf2d28a
VF		 176/**
177 * __agg_has_partner - see if we have a partner
178 * @agg: the agregator we're looking at
fd989c83
JV		 179 *
180 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
3bf2d28a 181 * address for the partner). Return 0 if not.
fd989c83
JV		 182 */
183static inline int __agg_has_partner(struct aggregator *agg)
184{
185 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
186}
187
1da177e4
LT		 188/**
189 * __disable_port - disable the port's slave
190 * @port: the port we're looking at
1da177e4
LT		 191 */
192static inline void __disable_port(struct port *port)
193{
5e5b0665 194 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
1da177e4
LT		 195}
196
197/**
198 * __enable_port - enable the port's slave, if it's up
199 * @port: the port we're looking at
1da177e4
LT		 200 */
201static inline void __enable_port(struct port *port)
202{
203 struct slave *slave = port->slave;
204
b6adc610 205 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
5e5b0665 206 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
1da177e4
LT		 207}
208
209/**
210 * __port_is_enabled - check if the port's slave is in active state
211 * @port: the port we're looking at
1da177e4
LT		 212 */
213static inline int __port_is_enabled(struct port *port)
214{
e30bc066 215 return bond_is_active_slave(port->slave);
1da177e4
LT		 216}
217
218/**
219 * __get_agg_selection_mode - get the aggregator selection mode
220 * @port: the port we're looking at
221 *
fd989c83 222 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 223 */
224static inline u32 __get_agg_selection_mode(struct port *port)
225{
226 struct bonding *bond = __get_bond_by_port(port);
227
7bfc4753 228 if (bond == NULL)
fd989c83 229 return BOND_AD_STABLE;
1da177e4 230
1a14fbcb 231 return bond->params.ad_select;
1da177e4
LT		 232}
233
234/**
235 * __check_agg_selection_timer - check if the selection timer has expired
236 * @port: the port we're looking at
1da177e4
LT		 237 */
238static inline int __check_agg_selection_timer(struct port *port)
239{
240 struct bonding *bond = __get_bond_by_port(port);
241
7bfc4753 242 if (bond == NULL)
1da177e4 243 return 0;
1da177e4
LT		 244
245 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
246}
247
1da177e4
LT		 248/**
249 * __get_link_speed - get a port's speed
250 * @port: the port we're looking at
251 *
cb8dda90 252 * Return @port's speed in 802.3ad enum format. i.e. one of:
1da177e4 253 * 0,
cb8dda90
JX		 254 * %AD_LINK_SPEED_10MBPS,
255 * %AD_LINK_SPEED_100MBPS,
256 * %AD_LINK_SPEED_1000MBPS,
424c3232 257 * %AD_LINK_SPEED_2500MBPS,
cb8dda90 258 * %AD_LINK_SPEED_10000MBPS
424c3232
JX		 259 * %AD_LINK_SPEED_20000MBPS
260 * %AD_LINK_SPEED_40000MBPS
261 * %AD_LINK_SPEED_56000MBPS
3952af4d 262 * %AD_LINK_SPEED_100000MBPS
1da177e4
LT		 263 */
264static u16 __get_link_speed(struct port *port)
265{
266 struct slave *slave = port->slave;
267 u16 speed;
268
3bf2d28a
VF		 269 /* this if covers only a special case: when the configuration starts
270 * with link down, it sets the speed to 0.
271 * This is done in spite of the fact that the e100 driver reports 0
272 * to be compatible with MVT in the future.
273 */
7bfc4753 274 if (slave->link != BOND_LINK_UP)
128ea6c3 275 speed = 0;
7bfc4753 276 else {
1da177e4
LT		 277 switch (slave->speed) {
278 case SPEED_10:
cb8dda90 279 speed = AD_LINK_SPEED_10MBPS;
1da177e4
LT		 280 break;
281
282 case SPEED_100:
cb8dda90 283 speed = AD_LINK_SPEED_100MBPS;
1da177e4
LT		 284 break;
285
286 case SPEED_1000:
cb8dda90 287 speed = AD_LINK_SPEED_1000MBPS;
1da177e4
LT		 288 break;
289
424c3232
JX		 290 case SPEED_2500:
291 speed = AD_LINK_SPEED_2500MBPS;
292 break;
293
94dbffd5 294 case SPEED_10000:
cb8dda90 295 speed = AD_LINK_SPEED_10000MBPS;
94dbffd5
JV		 296 break;
297
424c3232
JX		 298 case SPEED_20000:
299 speed = AD_LINK_SPEED_20000MBPS;
300 break;
301
302 case SPEED_40000:
303 speed = AD_LINK_SPEED_40000MBPS;
304 break;
305
306 case SPEED_56000:
307 speed = AD_LINK_SPEED_56000MBPS;
308 break;
309
3952af4d
JP		 310 case SPEED_100000:
311 speed = AD_LINK_SPEED_100000MBPS;
312 break;
313
1da177e4 314 default:
3bf2d28a
VF		 315 /* unknown speed value from ethtool. shouldn't happen */
316 speed = 0;
1da177e4
LT		 317 break;
318 }
319 }
320
d4471f5e
VF		 321 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
322 port->actor_port_number, speed);
1da177e4
LT		 323 return speed;
324}
325
326/**
327 * __get_duplex - get a port's duplex
328 * @port: the port we're looking at
329 *
330 * Return @port's duplex in 802.3ad bitmask format. i.e.:
331 * 0x01 if in full duplex
332 * 0x00 otherwise
333 */
334static u8 __get_duplex(struct port *port)
335{
336 struct slave *slave = port->slave;
b25c2e7d 337 u8 retval = 0x0;
1da177e4 338
3bf2d28a
VF		 339 /* handling a special case: when the configuration starts with
340 * link down, it sets the duplex to 0.
341 */
b25c2e7d 342 if (slave->link == BOND_LINK_UP) {
1da177e4
LT		 343 switch (slave->duplex) {
344 case DUPLEX_FULL:
128ea6c3 345 retval = 0x1;
d4471f5e
VF		 346 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
347 port->actor_port_number);
1da177e4
LT		 348 break;
349 case DUPLEX_HALF:
350 default:
128ea6c3 351 retval = 0x0;
d4471f5e
VF		 352 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
353 port->actor_port_number);
1da177e4
LT		 354 break;
355 }
356 }
357 return retval;
358}
359
5ee14e6d
NA		 360static void __ad_actor_update_port(struct port *port)
361{
362 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
363
364 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
365 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
366}
367
3bf2d28a 368/* Conversions */
1da177e4
LT		 369
370/**
371 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
372 * @timer_type: which timer to operate
373 * @par: timer parameter. see below
374 *
375 * If @timer_type is %current_while_timer, @par indicates long/short timer.
376 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
3bf2d28a 377 * %SLOW_PERIODIC_TIME.
1da177e4
LT		 378 */
379static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
380{
128ea6c3 381 u16 retval = 0; /* to silence the compiler */
1da177e4
LT		 382
383 switch (timer_type) {
3bf2d28a 384 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
7bfc4753 385 if (par)
3bf2d28a 386 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
7bfc4753 387 else
3bf2d28a 388 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
1da177e4 389 break;
3bf2d28a 390 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
1da177e4
LT		 391 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
392 break;
3bf2d28a
VF		 393 case AD_PERIODIC_TIMER: /* for periodic machine */
394 retval = (par*ad_ticks_per_sec); /* long timeout */
1da177e4 395 break;
3bf2d28a 396 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
1da177e4
LT		 397 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
398 break;
3bf2d28a 399 case AD_WAIT_WHILE_TIMER: /* for selection machine */
1da177e4
LT		 400 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
401 break;
402 }
3bf2d28a 403
1da177e4
LT		 404 return retval;
405}
406
407
3bf2d28a 408/* ================= ad_rx_machine helper functions ================== */
1da177e4 409
2d6682db
JV		 410/**
411 * __choose_matched - update a port's matched variable from a received lacpdu
412 * @lacpdu: the lacpdu we've received
413 * @port: the port we're looking at
414 *
415 * Update the value of the matched variable, using parameter values from a
416 * newly received lacpdu. Parameter values for the partner carried in the
417 * received PDU are compared with the corresponding operational parameter
418 * values for the actor. Matched is set to TRUE if all of these parameters
419 * match and the PDU parameter partner_state.aggregation has the same value as
420 * actor_oper_port_state.aggregation and lacp will actively maintain the link
421 * in the aggregation. Matched is also set to TRUE if the value of
422 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
423 * an individual link and lacp will actively maintain the link. Otherwise,
424 * matched is set to FALSE. LACP is considered to be actively maintaining the
425 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
426 * the actor's actor_oper_port_state.lacp_activity and the PDU's
427 * partner_state.lacp_activity variables are TRUE.
428 *
429 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
430 * used here to implement the language from 802.3ad 43.4.9 that requires
431 * recordPDU to "match" the LACPDU parameters to the stored values.
432 */
433static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
434{
815117ad 435 /* check if all parameters are alike
436 * or this is individual link(aggregation == FALSE)
437 * then update the state machine Matched variable.
438 */
2d6682db
JV		 439 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
440 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
815117ad 441 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
2d6682db
JV		 442 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
443 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
444 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
2d6682db
JV		 445 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
446 ) {
2d6682db
JV		 447 port->sm_vars |= AD_PORT_MATCHED;
448 } else {
449 port->sm_vars &= ~AD_PORT_MATCHED;
450 }
451}
452
1da177e4
LT		 453/**
454 * __record_pdu - record parameters from a received lacpdu
455 * @lacpdu: the lacpdu we've received
456 * @port: the port we're looking at
457 *
458 * Record the parameter values for the Actor carried in a received lacpdu as
459 * the current partner operational parameter values and sets
460 * actor_oper_port_state.defaulted to FALSE.
461 */
462static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
463{
1da177e4 464 if (lacpdu && port) {
b99d6ba9
HE		 465 struct port_params *partner = &port->partner_oper;
466
2d6682db 467 __choose_matched(lacpdu, port);
3bf2d28a
VF		 468 /* record the new parameter values for the partner
469 * operational
470 */
b99d6ba9
HE		 471 partner->port_number = ntohs(lacpdu->actor_port);
472 partner->port_priority = ntohs(lacpdu->actor_port_priority);
473 partner->system = lacpdu->actor_system;
474 partner->system_priority = ntohs(lacpdu->actor_system_priority);
475 partner->key = ntohs(lacpdu->actor_key);
476 partner->port_state = lacpdu->actor_state;
1da177e4 477
3bf2d28a 478 /* set actor_oper_port_state.defaulted to FALSE */
1da177e4
LT		 479 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
480
3bf2d28a
VF		 481 /* set the partner sync. to on if the partner is sync,
482 * and the port is matched
483 */
63b46242
WK		 484 if ((port->sm_vars & AD_PORT_MATCHED) &&
485 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
b99d6ba9 486 partner->port_state |= AD_STATE_SYNCHRONIZATION;
63b46242
WK		 487 pr_debug("%s partner sync=1\n", port->slave->dev->name);
488 } else {
b99d6ba9 489 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
63b46242
WK		 490 pr_debug("%s partner sync=0\n", port->slave->dev->name);
491 }
1da177e4
LT		 492 }
493}
494
495/**
496 * __record_default - record default parameters
497 * @port: the port we're looking at
498 *
499 * This function records the default parameter values for the partner carried
500 * in the Partner Admin parameters as the current partner operational parameter
501 * values and sets actor_oper_port_state.defaulted to TRUE.
502 */
503static void __record_default(struct port *port)
504{
1da177e4 505 if (port) {
3bf2d28a 506 /* record the partner admin parameters */
5eefd1ad
HE		 507 memcpy(&port->partner_oper, &port->partner_admin,
508 sizeof(struct port_params));
1da177e4 509
3bf2d28a 510 /* set actor_oper_port_state.defaulted to true */
1da177e4
LT		 511 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
512 }
513}
514
515/**
516 * __update_selected - update a port's Selected variable from a received lacpdu
517 * @lacpdu: the lacpdu we've received
518 * @port: the port we're looking at
519 *
520 * Update the value of the selected variable, using parameter values from a
521 * newly received lacpdu. The parameter values for the Actor carried in the
522 * received PDU are compared with the corresponding operational parameter
523 * values for the ports partner. If one or more of the comparisons shows that
524 * the value(s) received in the PDU differ from the current operational values,
525 * then selected is set to FALSE and actor_oper_port_state.synchronization is
526 * set to out_of_sync. Otherwise, selected remains unchanged.
527 */
528static void __update_selected(struct lacpdu *lacpdu, struct port *port)
529{
1da177e4 530 if (lacpdu && port) {
ce6a49ad
HE		 531 const struct port_params *partner = &port->partner_oper;
532
815117ad 533 /* check if any parameter is different then
534 * update the state machine selected variable.
535 */
8e95a202
JP		 536 if (ntohs(lacpdu->actor_port) != partner->port_number ||
537 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
815117ad 538 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
8e95a202
JP		 539 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
540 ntohs(lacpdu->actor_key) != partner->key ||
541 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 542 port->sm_vars &= ~AD_PORT_SELECTED;
543 }
544 }
545}
546
547/**
548 * __update_default_selected - update a port's Selected variable from Partner
549 * @port: the port we're looking at
550 *
551 * This function updates the value of the selected variable, using the partner
552 * administrative parameter values. The administrative values are compared with
553 * the corresponding operational parameter values for the partner. If one or
554 * more of the comparisons shows that the administrative value(s) differ from
555 * the current operational values, then Selected is set to FALSE and
556 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
557 * Selected remains unchanged.
558 */
559static void __update_default_selected(struct port *port)
560{
1da177e4 561 if (port) {
3c52065f
HE		 562 const struct port_params *admin = &port->partner_admin;
563 const struct port_params *oper = &port->partner_oper;
564
815117ad 565 /* check if any parameter is different then
566 * update the state machine selected variable.
567 */
8e95a202
JP		 568 if (admin->port_number != oper->port_number ||
569 admin->port_priority != oper->port_priority ||
815117ad 570 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
8e95a202
JP		 571 admin->system_priority != oper->system_priority ||
572 admin->key != oper->key ||
573 (admin->port_state & AD_STATE_AGGREGATION)
3c52065f 574 != (oper->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 575 port->sm_vars &= ~AD_PORT_SELECTED;
576 }
577 }
578}
579
1da177e4
LT		 580/**
581 * __update_ntt - update a port's ntt variable from a received lacpdu
582 * @lacpdu: the lacpdu we've received
583 * @port: the port we're looking at
584 *
585 * Updates the value of the ntt variable, using parameter values from a newly
586 * received lacpdu. The parameter values for the partner carried in the
587 * received PDU are compared with the corresponding operational parameter
588 * values for the Actor. If one or more of the comparisons shows that the
589 * value(s) received in the PDU differ from the current operational values,
590 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
591 */
592static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
593{
815117ad 594 /* validate lacpdu and port */
1da177e4 595 if (lacpdu && port) {
815117ad 596 /* check if any parameter is different then
597 * update the port->ntt.
598 */
89cc76f9
JV		 599 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
600 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
815117ad 601 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 602 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
603 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 604 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
605 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
606 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
607 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
608 ) {
d238d458 609 port->ntt = true;
1da177e4
LT		 610 }
611 }
612}
613
1da177e4
LT		 614/**
615 * __agg_ports_are_ready - check if all ports in an aggregator are ready
616 * @aggregator: the aggregator we're looking at
617 *
618 */
619static int __agg_ports_are_ready(struct aggregator *aggregator)
620{
621 struct port *port;
622 int retval = 1;
623
624 if (aggregator) {
3bf2d28a
VF		 625 /* scan all ports in this aggregator to verfy if they are
626 * all ready.
627 */
128ea6c3
BD		 628 for (port = aggregator->lag_ports;
629 port;
630 port = port->next_port_in_aggregator) {
1da177e4
LT		 631 if (!(port->sm_vars & AD_PORT_READY_N)) {
632 retval = 0;
633 break;
634 }
635 }
636 }
637
638 return retval;
639}
640
641/**
642 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
643 * @aggregator: the aggregator we're looking at
644 * @val: Should the ports' ready bit be set on or off
645 *
646 */
647static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
648{
649 struct port *port;
650
128ea6c3
BD		 651 for (port = aggregator->lag_ports; port;
652 port = port->next_port_in_aggregator) {
7bfc4753 653 if (val)
1da177e4 654 port->sm_vars |= AD_PORT_READY;
7bfc4753 655 else
1da177e4 656 port->sm_vars &= ~AD_PORT_READY;
1da177e4
LT		 657 }
658}
659
0622cab0
JV		 660static int __agg_active_ports(struct aggregator *agg)
661{
662 struct port *port;
663 int active = 0;
664
665 for (port = agg->lag_ports; port;
666 port = port->next_port_in_aggregator) {
667 if (port->is_enabled)
668 active++;
669 }
670
671 return active;
672}
673
1da177e4
LT		 674/**
675 * __get_agg_bandwidth - get the total bandwidth of an aggregator
676 * @aggregator: the aggregator we're looking at
677 *
678 */
679static u32 __get_agg_bandwidth(struct aggregator *aggregator)
680{
0622cab0 681 int nports = __agg_active_ports(aggregator);
128ea6c3 682 u32 bandwidth = 0;
1da177e4 683
0622cab0 684 if (nports) {
65cce19c 685 switch (__get_link_speed(aggregator->lag_ports)) {
cb8dda90 686 case AD_LINK_SPEED_1MBPS:
0622cab0 687 bandwidth = nports;
1da177e4 688 break;
cb8dda90 689 case AD_LINK_SPEED_10MBPS:
0622cab0 690 bandwidth = nports * 10;
1da177e4 691 break;
cb8dda90 692 case AD_LINK_SPEED_100MBPS:
0622cab0 693 bandwidth = nports * 100;
1da177e4 694 break;
cb8dda90 695 case AD_LINK_SPEED_1000MBPS:
0622cab0 696 bandwidth = nports * 1000;
1da177e4 697 break;
424c3232 698 case AD_LINK_SPEED_2500MBPS:
0622cab0 699 bandwidth = nports * 2500;
424c3232 700 break;
cb8dda90 701 case AD_LINK_SPEED_10000MBPS:
0622cab0 702 bandwidth = nports * 10000;
94dbffd5 703 break;
424c3232 704 case AD_LINK_SPEED_20000MBPS:
0622cab0 705 bandwidth = nports * 20000;
424c3232
JX		 706 break;
707 case AD_LINK_SPEED_40000MBPS:
0622cab0 708 bandwidth = nports * 40000;
424c3232
JX		 709 break;
710 case AD_LINK_SPEED_56000MBPS:
0622cab0 711 bandwidth = nports * 56000;
424c3232 712 break;
3952af4d 713 case AD_LINK_SPEED_100000MBPS:
0622cab0 714 bandwidth = nports * 100000;
3952af4d 715 break;
1da177e4 716 default:
3bf2d28a 717 bandwidth = 0; /* to silence the compiler */
1da177e4
LT		 718 }
719 }
720 return bandwidth;
721}
722
723/**
724 * __get_active_agg - get the current active aggregator
725 * @aggregator: the aggregator we're looking at
49b7624e
VF		 726 *
727 * Caller must hold RCU lock.
1da177e4
LT		 728 */
729static struct aggregator *__get_active_agg(struct aggregator *aggregator)
730{
19177e7d
VF		 731 struct bonding *bond = aggregator->slave->bond;
732 struct list_head *iter;
733 struct slave *slave;
1da177e4 734
be79bd04 735 bond_for_each_slave_rcu(bond, slave, iter)
3fdddd85 736 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
737 return &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4 738
19177e7d 739 return NULL;
1da177e4
LT		 740}
741
742/**
743 * __update_lacpdu_from_port - update a port's lacpdu fields
744 * @port: the port we're looking at
1da177e4
LT		 745 */
746static inline void __update_lacpdu_from_port(struct port *port)
747{
748 struct lacpdu *lacpdu = &port->lacpdu;
3b5b35d0 749 const struct port_params *partner = &port->partner_oper;
1da177e4 750
3bf2d28a
VF		 751 /* update current actual Actor parameters
752 * lacpdu->subtype initialized
1da177e4
LT		 753 * lacpdu->version_number initialized
754 * lacpdu->tlv_type_actor_info initialized
755 * lacpdu->actor_information_length initialized
756 */
757
d3bb52b0 758 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 759 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 760 lacpdu->actor_key = htons(port->actor_oper_port_key);
761 lacpdu->actor_port_priority = htons(port->actor_port_priority);
762 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4 763 lacpdu->actor_state = port->actor_oper_port_state;
63b46242
WK		 764 pr_debug("update lacpdu: %s, actor port state %x\n",
765 port->slave->dev->name, port->actor_oper_port_state);
1da177e4
LT		 766
767 /* lacpdu->reserved_3_1 initialized
768 * lacpdu->tlv_type_partner_info initialized
769 * lacpdu->partner_information_length initialized
770 */
771
3b5b35d0
HE		 772 lacpdu->partner_system_priority = htons(partner->system_priority);
773 lacpdu->partner_system = partner->system;
774 lacpdu->partner_key = htons(partner->key);
775 lacpdu->partner_port_priority = htons(partner->port_priority);
776 lacpdu->partner_port = htons(partner->port_number);
777 lacpdu->partner_state = partner->port_state;
1da177e4
LT		 778
779 /* lacpdu->reserved_3_2 initialized
780 * lacpdu->tlv_type_collector_info initialized
781 * lacpdu->collector_information_length initialized
782 * collector_max_delay initialized
783 * reserved_12[12] initialized
784 * tlv_type_terminator initialized
785 * terminator_length initialized
786 * reserved_50[50] initialized
787 */
1da177e4
LT		 788}
789
3bf2d28a 790/* ================= main 802.3ad protocol code ========================= */
1da177e4
LT		 791
792/**
793 * ad_lacpdu_send - send out a lacpdu packet on a given port
794 * @port: the port we're looking at
795 *
796 * Returns: 0 on success
797 * < 0 on error
798 */
799static int ad_lacpdu_send(struct port *port)
800{
801 struct slave *slave = port->slave;
802 struct sk_buff *skb;
803 struct lacpdu_header *lacpdu_header;
804 int length = sizeof(struct lacpdu_header);
1da177e4
LT		 805
806 skb = dev_alloc_skb(length);
7bfc4753 807 if (!skb)
1da177e4 808 return -ENOMEM;
1da177e4
LT		 809
810 skb->dev = slave->dev;
459a98ed 811 skb_reset_mac_header(skb);
b0e380b1 812 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 813 skb->protocol = PKT_TYPE_LACPDU;
814 skb->priority = TC_PRIO_CONTROL;
815
816 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
817
ada0f863 818 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
b595076a 819 /* Note: source address is set to be the member's PERMANENT address,
3bf2d28a
VF		 820 * because we use it to identify loopback lacpdus in receive.
821 */
ada0f863 822 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
e727149e 823 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4 824
3bf2d28a 825 lacpdu_header->lacpdu = port->lacpdu;
1da177e4
LT		 826
827 dev_queue_xmit(skb);
828
829 return 0;
830}
831
832/**
833 * ad_marker_send - send marker information/response on a given port
834 * @port: the port we're looking at
835 * @marker: marker data to send
836 *
837 * Returns: 0 on success
838 * < 0 on error
839 */
1c3f0b8e 840static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 841{
842 struct slave *slave = port->slave;
843 struct sk_buff *skb;
1c3f0b8e
MD		 844 struct bond_marker_header *marker_header;
845 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 846
847 skb = dev_alloc_skb(length + 16);
7bfc4753 848 if (!skb)
1da177e4 849 return -ENOMEM;
1da177e4
LT		 850
851 skb_reserve(skb, 16);
852
853 skb->dev = slave->dev;
459a98ed 854 skb_reset_mac_header(skb);
b0e380b1 855 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 856 skb->protocol = PKT_TYPE_LACPDU;
857
1c3f0b8e 858 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4 859
ada0f863 860 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
b595076a 861 /* Note: source address is set to be the member's PERMANENT address,
3bf2d28a
VF		 862 * because we use it to identify loopback MARKERs in receive.
863 */
ada0f863 864 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
e727149e 865 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4 866
3bf2d28a 867 marker_header->marker = *marker;
1da177e4
LT		 868
869 dev_queue_xmit(skb);
870
871 return 0;
872}
873
874/**
875 * ad_mux_machine - handle a port's mux state machine
876 * @port: the port we're looking at
ee637714 877 * @update_slave_arr: Does slave array need update?
1da177e4 878 */
ee637714 879static void ad_mux_machine(struct port *port, bool *update_slave_arr)
1da177e4
LT		 880{
881 mux_states_t last_state;
882
3bf2d28a
VF		 883 /* keep current State Machine state to compare later if it was
884 * changed
885 */
1da177e4
LT		 886 last_state = port->sm_mux_state;
887
888 if (port->sm_vars & AD_PORT_BEGIN) {
3bf2d28a 889 port->sm_mux_state = AD_MUX_DETACHED;
1da177e4
LT		 890 } else {
891 switch (port->sm_mux_state) {
892 case AD_MUX_DETACHED:
7bfc4753
BD		 893 if ((port->sm_vars & AD_PORT_SELECTED)
894 || (port->sm_vars & AD_PORT_STANDBY))
895 /* if SELECTED or STANDBY */
3bf2d28a 896 port->sm_mux_state = AD_MUX_WAITING;
1da177e4
LT		 897 break;
898 case AD_MUX_WAITING:
3bf2d28a
VF		 899 /* if SELECTED == FALSE return to DETACH state */
900 if (!(port->sm_vars & AD_PORT_SELECTED)) {
1da177e4 901 port->sm_vars &= ~AD_PORT_READY_N;
3bf2d28a
VF		 902 /* in order to withhold the Selection Logic to
903 * check all ports READY_N value every callback
904 * cycle to update ready variable, we check
905 * READY_N and update READY here
906 */
1da177e4 907 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
3bf2d28a 908 port->sm_mux_state = AD_MUX_DETACHED;
1da177e4
LT		 909 break;
910 }
911
3bf2d28a 912 /* check if the wait_while_timer expired */
7bfc4753
BD		 913 if (port->sm_mux_timer_counter
914 && !(--port->sm_mux_timer_counter))
1da177e4 915 port->sm_vars |= AD_PORT_READY_N;
1da177e4 916
3bf2d28a
VF		 917 /* in order to withhold the selection logic to check
918 * all ports READY_N value every callback cycle to
919 * update ready variable, we check READY_N and update
920 * READY here
921 */
1da177e4
LT		 922 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
923
3bf2d28a
VF		 924 /* if the wait_while_timer expired, and the port is
925 * in READY state, move to ATTACHED state
926 */
7bfc4753
BD		 927 if ((port->sm_vars & AD_PORT_READY)
928 && !port->sm_mux_timer_counter)
3bf2d28a 929 port->sm_mux_state = AD_MUX_ATTACHED;
1da177e4
LT		 930 break;
931 case AD_MUX_ATTACHED:
3bf2d28a
VF		 932 /* check also if agg_select_timer expired (so the
933 * edable port will take place only after this timer)
934 */
935 if ((port->sm_vars & AD_PORT_SELECTED) &&
936 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
937 !__check_agg_selection_timer(port)) {
63b46242
WK		 938 if (port->aggregator->is_active)
939 port->sm_mux_state =
940 AD_MUX_COLLECTING_DISTRIBUTING;
3bf2d28a
VF		 941 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
942 (port->sm_vars & AD_PORT_STANDBY)) {
943 /* if UNSELECTED or STANDBY */
1da177e4 944 port->sm_vars &= ~AD_PORT_READY_N;
3bf2d28a
VF		 945 /* in order to withhold the selection logic to
946 * check all ports READY_N value every callback
947 * cycle to update ready variable, we check
948 * READY_N and update READY here
949 */
1da177e4 950 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
3bf2d28a 951 port->sm_mux_state = AD_MUX_DETACHED;
63b46242
WK		 952 } else if (port->aggregator->is_active) {
953 port->actor_oper_port_state |=
954 AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 955 }
956 break;
957 case AD_MUX_COLLECTING_DISTRIBUTING:
3bf2d28a
VF		 958 if (!(port->sm_vars & AD_PORT_SELECTED) ||
959 (port->sm_vars & AD_PORT_STANDBY) ||
63b46242
WK		 960 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
961 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
3bf2d28a 962 port->sm_mux_state = AD_MUX_ATTACHED;
1da177e4 963 } else {
3bf2d28a
VF		 964 /* if port state hasn't changed make
965 * sure that a collecting distributing
966 * port in an active aggregator is enabled
967 */
1da177e4
LT		 968 if (port->aggregator &&
969 port->aggregator->is_active &&
970 !__port_is_enabled(port)) {
971
972 __enable_port(port);
973 }
974 }
975 break;
3bf2d28a 976 default:
1da177e4
LT		 977 break;
978 }
979 }
980
3bf2d28a 981 /* check if the state machine was changed */
1da177e4 982 if (port->sm_mux_state != last_state) {
63b46242
WK		 983 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
984 port->actor_port_number,
985 port->slave->dev->name,
986 last_state,
a4aee5c8 987 port->sm_mux_state);
1da177e4
LT		 988 switch (port->sm_mux_state) {
989 case AD_MUX_DETACHED:
1da177e4 990 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
ee637714
MB		 991 ad_disable_collecting_distributing(port,
992 update_slave_arr);
1da177e4
LT		 993 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
994 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
d238d458 995 port->ntt = true;
1da177e4
LT		 996 break;
997 case AD_MUX_WAITING:
998 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
999 break;
1000 case AD_MUX_ATTACHED:
63b46242
WK		 1001 if (port->aggregator->is_active)
1002 port->actor_oper_port_state |=
1003 AD_STATE_SYNCHRONIZATION;
1004 else
1005 port->actor_oper_port_state &=
1006 ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 1007 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1008 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
ee637714
MB		 1009 ad_disable_collecting_distributing(port,
1010 update_slave_arr);
d238d458 1011 port->ntt = true;
1da177e4
LT		 1012 break;
1013 case AD_MUX_COLLECTING_DISTRIBUTING:
1014 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1015 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
63b46242 1016 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
ee637714
MB		 1017 ad_enable_collecting_distributing(port,
1018 update_slave_arr);
d238d458 1019 port->ntt = true;
1da177e4 1020 break;
3bf2d28a 1021 default:
1da177e4
LT		 1022 break;
1023 }
1024 }
1025}
1026
1027/**
1028 * ad_rx_machine - handle a port's rx State Machine
1029 * @lacpdu: the lacpdu we've received
1030 * @port: the port we're looking at
1031 *
1032 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1033 * CURRENT. If timer expired set the state machine in the proper state.
1034 * In other cases, this function checks if we need to switch to other state.
1035 */
1036static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1037{
1038 rx_states_t last_state;
1039
3bf2d28a
VF		 1040 /* keep current State Machine state to compare later if it was
1041 * changed
1042 */
1da177e4
LT		 1043 last_state = port->sm_rx_state;
1044
3bf2d28a
VF		 1045 /* check if state machine should change state */
1046
1047 /* first, check if port was reinitialized */
14c9551a 1048 if (port->sm_vars & AD_PORT_BEGIN) {
7bfc4753 1049 port->sm_rx_state = AD_RX_INITIALIZE;
ef015d72 1050 port->sm_vars |= AD_PORT_CHURNED;
3bf2d28a 1051 /* check if port is not enabled */
14c9551a 1052 } else if (!(port->sm_vars & AD_PORT_BEGIN)
7bfc4753 1053 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
7bfc4753 1054 port->sm_rx_state = AD_RX_PORT_DISABLED;
3bf2d28a
VF		 1055 /* check if new lacpdu arrived */
1056 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1057 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1058 (port->sm_rx_state == AD_RX_CURRENT))) {
14c9551a 1059 if (port->sm_rx_state != AD_RX_CURRENT)
ef015d72 1060 port->sm_vars |= AD_PORT_CHURNED;
3bf2d28a 1061 port->sm_rx_timer_counter = 0;
1da177e4
LT		 1062 port->sm_rx_state = AD_RX_CURRENT;
1063 } else {
3bf2d28a
VF		 1064 /* if timer is on, and if it is expired */
1065 if (port->sm_rx_timer_counter &&
1066 !(--port->sm_rx_timer_counter)) {
1da177e4
LT		 1067 switch (port->sm_rx_state) {
1068 case AD_RX_EXPIRED:
3bf2d28a 1069 port->sm_rx_state = AD_RX_DEFAULTED;
1da177e4
LT		 1070 break;
1071 case AD_RX_CURRENT:
3bf2d28a 1072 port->sm_rx_state = AD_RX_EXPIRED;
1da177e4 1073 break;
3bf2d28a 1074 default:
1da177e4
LT		 1075 break;
1076 }
1077 } else {
3bf2d28a 1078 /* if no lacpdu arrived and no timer is on */
1da177e4
LT		 1079 switch (port->sm_rx_state) {
1080 case AD_RX_PORT_DISABLED:
7bfc4753 1081 if (port->sm_vars & AD_PORT_MOVED)
3bf2d28a 1082 port->sm_rx_state = AD_RX_INITIALIZE;
7bfc4753
BD		 1083 else if (port->is_enabled
1084 && (port->sm_vars
1085 & AD_PORT_LACP_ENABLED))
3bf2d28a 1086 port->sm_rx_state = AD_RX_EXPIRED;
7bfc4753
BD		 1087 else if (port->is_enabled
1088 && ((port->sm_vars
1089 & AD_PORT_LACP_ENABLED) == 0))
3bf2d28a 1090 port->sm_rx_state = AD_RX_LACP_DISABLED;
1da177e4 1091 break;
3bf2d28a 1092 default:
1da177e4
LT		 1093 break;
1094
1095 }
1096 }
1097 }
1098
3bf2d28a 1099 /* check if the State machine was changed or new lacpdu arrived */
1da177e4 1100 if ((port->sm_rx_state != last_state) || (lacpdu)) {
63b46242
WK		 1101 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1102 port->actor_port_number,
1103 port->slave->dev->name,
1104 last_state,
a4aee5c8 1105 port->sm_rx_state);
1da177e4
LT		 1106 switch (port->sm_rx_state) {
1107 case AD_RX_INITIALIZE:
cb8dda90 1108 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1da177e4 1109 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
7bfc4753 1110 else
1da177e4 1111 port->sm_vars |= AD_PORT_LACP_ENABLED;
1da177e4
LT		 1112 port->sm_vars &= ~AD_PORT_SELECTED;
1113 __record_default(port);
1114 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1115 port->sm_vars &= ~AD_PORT_MOVED;
3bf2d28a 1116 port->sm_rx_state = AD_RX_PORT_DISABLED;
1da177e4 1117
3bf2d28a 1118 /* Fall Through */
1da177e4
LT		 1119 case AD_RX_PORT_DISABLED:
1120 port->sm_vars &= ~AD_PORT_MATCHED;
1121 break;
1122 case AD_RX_LACP_DISABLED:
1123 port->sm_vars &= ~AD_PORT_SELECTED;
1124 __record_default(port);
1055c9ab 1125 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1126 port->sm_vars |= AD_PORT_MATCHED;
1127 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1128 break;
1129 case AD_RX_EXPIRED:
3bf2d28a
VF		 1130 /* Reset of the Synchronization flag (Standard 43.4.12)
1131 * This reset cause to disable this port in the
1132 * COLLECTING_DISTRIBUTING state of the mux machine in
1133 * case of EXPIRED even if LINK_DOWN didn't arrive for
1134 * the port.
1135 */
1055c9ab 1136 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1137 port->sm_vars &= ~AD_PORT_MATCHED;
14c9551a 1138 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
3bf2d28a 1139 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1da177e4
LT		 1140 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1141 port->actor_oper_port_state |= AD_STATE_EXPIRED;
ef015d72 1142 port->sm_vars |= AD_PORT_CHURNED;
1da177e4
LT		 1143 break;
1144 case AD_RX_DEFAULTED:
1145 __update_default_selected(port);
1146 __record_default(port);
1147 port->sm_vars |= AD_PORT_MATCHED;
1148 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1149 break;
1150 case AD_RX_CURRENT:
815117ad 1151 /* detect loopback situation */
3bf2d28a
VF		 1152 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1153 &(port->actor_system))) {
d4471f5e 1154 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
90194264 1155 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
3bf2d28a 1156 port->slave->dev->name);
1da177e4
LT		 1157 return;
1158 }
1159 __update_selected(lacpdu, port);
1160 __update_ntt(lacpdu, port);
1161 __record_pdu(lacpdu, port);
1da177e4
LT		 1162 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1163 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1da177e4 1164 break;
3bf2d28a 1165 default:
1da177e4
LT		 1166 break;
1167 }
1168 }
1da177e4
LT		 1169}
1170
14c9551a
MB		 1171/**
1172 * ad_churn_machine - handle port churn's state machine
1173 * @port: the port we're looking at
1174 *
1175 */
1176static void ad_churn_machine(struct port *port)
1177{
ef015d72
MB		 1178 if (port->sm_vars & AD_PORT_CHURNED) {
1179 port->sm_vars &= ~AD_PORT_CHURNED;
14c9551a
MB		 1180 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1181 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1182 port->sm_churn_actor_timer_counter =
1183 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1184 port->sm_churn_partner_timer_counter =
1185 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1186 return;
1187 }
1188 if (port->sm_churn_actor_timer_counter &&
1189 !(--port->sm_churn_actor_timer_counter) &&
1190 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1191 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1192 port->sm_churn_actor_state = AD_NO_CHURN;
1193 } else {
1194 port->churn_actor_count++;
1195 port->sm_churn_actor_state = AD_CHURN;
1196 }
1197 }
1198 if (port->sm_churn_partner_timer_counter &&
1199 !(--port->sm_churn_partner_timer_counter) &&
1200 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1201 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1202 port->sm_churn_partner_state = AD_NO_CHURN;
1203 } else {
1204 port->churn_partner_count++;
1205 port->sm_churn_partner_state = AD_CHURN;
1206 }
1207 }
1208}
1209
1da177e4
LT		 1210/**
1211 * ad_tx_machine - handle a port's tx state machine
1212 * @port: the port we're looking at
1da177e4
LT		 1213 */
1214static void ad_tx_machine(struct port *port)
1215{
3bf2d28a
VF		 1216 /* check if tx timer expired, to verify that we do not send more than
1217 * 3 packets per second
1218 */
1da177e4 1219 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
3bf2d28a 1220 /* check if there is something to send */
1da177e4
LT		 1221 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1222 __update_lacpdu_from_port(port);
d238d458 1223
1da177e4 1224 if (ad_lacpdu_send(port) >= 0) {
a4aee5c8
JP		 1225 pr_debug("Sent LACPDU on port %d\n",
1226 port->actor_port_number);
d238d458 1227
3bf2d28a
VF		 1228 /* mark ntt as false, so it will not be sent
1229 * again until demanded
1230 */
d238d458 1231 port->ntt = false;
1da177e4
LT		 1232 }
1233 }
3bf2d28a
VF		 1234 /* restart tx timer(to verify that we will not exceed
1235 * AD_MAX_TX_IN_SECOND
1236 */
1237 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 1238 }
1239}
1240
1241/**
1242 * ad_periodic_machine - handle a port's periodic state machine
1243 * @port: the port we're looking at
1244 *
1245 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1246 */
1247static void ad_periodic_machine(struct port *port)
1248{
1249 periodic_states_t last_state;
1250
3bf2d28a 1251 /* keep current state machine state to compare later if it was changed */
1da177e4
LT		 1252 last_state = port->sm_periodic_state;
1253
3bf2d28a 1254 /* check if port was reinitialized */
1da177e4 1255 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1256 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4 1257 ) {
3bf2d28a 1258 port->sm_periodic_state = AD_NO_PERIODIC;
1da177e4 1259 }
3bf2d28a 1260 /* check if state machine should change state */
1da177e4 1261 else if (port->sm_periodic_timer_counter) {
3bf2d28a 1262 /* check if periodic state machine expired */
1da177e4 1263 if (!(--port->sm_periodic_timer_counter)) {
3bf2d28a
VF		 1264 /* if expired then do tx */
1265 port->sm_periodic_state = AD_PERIODIC_TX;
1da177e4 1266 } else {
3bf2d28a
VF		 1267 /* If not expired, check if there is some new timeout
1268 * parameter from the partner state
1269 */
1da177e4
LT		 1270 switch (port->sm_periodic_state) {
1271 case AD_FAST_PERIODIC:
7bfc4753
BD		 1272 if (!(port->partner_oper.port_state
1273 & AD_STATE_LACP_TIMEOUT))
3bf2d28a 1274 port->sm_periodic_state = AD_SLOW_PERIODIC;
1da177e4
LT		 1275 break;
1276 case AD_SLOW_PERIODIC:
1055c9ab 1277 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4 1278 port->sm_periodic_timer_counter = 0;
3bf2d28a 1279 port->sm_periodic_state = AD_PERIODIC_TX;
1da177e4
LT		 1280 }
1281 break;
3bf2d28a 1282 default:
1da177e4
LT		 1283 break;
1284 }
1285 }
1286 } else {
1287 switch (port->sm_periodic_state) {
1288 case AD_NO_PERIODIC:
3bf2d28a 1289 port->sm_periodic_state = AD_FAST_PERIODIC;
1da177e4
LT		 1290 break;
1291 case AD_PERIODIC_TX:
3bf2d28a
VF		 1292 if (!(port->partner_oper.port_state &
1293 AD_STATE_LACP_TIMEOUT))
1294 port->sm_periodic_state = AD_SLOW_PERIODIC;
7bfc4753 1295 else
3bf2d28a 1296 port->sm_periodic_state = AD_FAST_PERIODIC;
1da177e4 1297 break;
3bf2d28a 1298 default:
1da177e4
LT		 1299 break;
1300 }
1301 }
1302
3bf2d28a 1303 /* check if the state machine was changed */
1da177e4 1304 if (port->sm_periodic_state != last_state) {
a4aee5c8
JP		 1305 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1306 port->actor_port_number, last_state,
1307 port->sm_periodic_state);
1da177e4
LT		 1308 switch (port->sm_periodic_state) {
1309 case AD_NO_PERIODIC:
3bf2d28a 1310 port->sm_periodic_timer_counter = 0;
1da177e4
LT		 1311 break;
1312 case AD_FAST_PERIODIC:
3bf2d28a
VF		 1313 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1314 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1da177e4
LT		 1315 break;
1316 case AD_SLOW_PERIODIC:
3bf2d28a
VF		 1317 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1318 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1da177e4
LT		 1319 break;
1320 case AD_PERIODIC_TX:
d238d458 1321 port->ntt = true;
1da177e4 1322 break;
3bf2d28a 1323 default:
1da177e4
LT		 1324 break;
1325 }
1326 }
1327}
1328
1329/**
1330 * ad_port_selection_logic - select aggregation groups
1331 * @port: the port we're looking at
ee637714 1332 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1333 *
1334 * Select aggregation groups, and assign each port for it's aggregetor. The
1335 * selection logic is called in the inititalization (after all the handshkes),
1336 * and after every lacpdu receive (if selected is off).
1337 */
ee637714 1338static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1da177e4
LT		 1339{
1340 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1341 struct port *last_port = NULL, *curr_port;
3e36bb75
VF		 1342 struct list_head *iter;
1343 struct bonding *bond;
1344 struct slave *slave;
1da177e4
LT		 1345 int found = 0;
1346
3bf2d28a 1347 /* if the port is already Selected, do nothing */
7bfc4753 1348 if (port->sm_vars & AD_PORT_SELECTED)
1da177e4 1349 return;
1da177e4 1350
3e36bb75
VF		 1351 bond = __get_bond_by_port(port);
1352
3bf2d28a 1353 /* if the port is connected to other aggregator, detach it */
1da177e4 1354 if (port->aggregator) {
3bf2d28a 1355 /* detach the port from its former aggregator */
128ea6c3
BD		 1356 temp_aggregator = port->aggregator;
1357 for (curr_port = temp_aggregator->lag_ports; curr_port;
1358 last_port = curr_port,
3bf2d28a 1359 curr_port = curr_port->next_port_in_aggregator) {
1da177e4
LT		 1360 if (curr_port == port) {
1361 temp_aggregator->num_of_ports--;
3bf2d28a
VF		 1362 /* if it is the first port attached to the
1363 * aggregator
1364 */
1365 if (!last_port) {
128ea6c3
BD		 1366 temp_aggregator->lag_ports =
1367 port->next_port_in_aggregator;
3bf2d28a
VF		 1368 } else {
1369 /* not the first port attached to the
1370 * aggregator
1371 */
128ea6c3
BD		 1372 last_port->next_port_in_aggregator =
1373 port->next_port_in_aggregator;
1da177e4
LT		 1374 }
1375
3bf2d28a
VF		 1376 /* clear the port's relations to this
1377 * aggregator
1378 */
1da177e4 1379 port->aggregator = NULL;
128ea6c3
BD		 1380 port->next_port_in_aggregator = NULL;
1381 port->actor_port_aggregator_identifier = 0;
1da177e4 1382
d4471f5e
VF		 1383 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1384 port->actor_port_number,
1385 temp_aggregator->aggregator_identifier);
3bf2d28a
VF		 1386 /* if the aggregator is empty, clear its
1387 * parameters, and set it ready to be attached
1388 */
7bfc4753 1389 if (!temp_aggregator->lag_ports)
1da177e4 1390 ad_clear_agg(temp_aggregator);
1da177e4
LT		 1391 break;
1392 }
1393 }
3bf2d28a
VF		 1394 if (!curr_port) {
1395 /* meaning: the port was related to an aggregator
1396 * but was not on the aggregator port list
1397 */
d4471f5e
VF		 1398 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1399 port->slave->bond->dev->name,
1400 port->actor_port_number,
1401 port->slave->dev->name,
1402 port->aggregator->aggregator_identifier);
1da177e4
LT		 1403 }
1404 }
3bf2d28a 1405 /* search on all aggregators for a suitable aggregator for this port */
3e36bb75 1406 bond_for_each_slave(bond, slave, iter) {
3fdddd85 1407 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4 1408
3bf2d28a 1409 /* keep a free aggregator for later use(if needed) */
1da177e4 1410 if (!aggregator->lag_ports) {
7bfc4753 1411 if (!free_aggregator)
128ea6c3 1412 free_aggregator = aggregator;
1da177e4
LT		 1413 continue;
1414 }
815117ad 1415 /* check if current aggregator suits us */
1416 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1417 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1055c9ab
HE		 1418 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1419 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1420 ) &&
815117ad 1421 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1422 !aggregator->is_individual) /* but is not individual OR */
1da177e4
LT		 1423 )
1424 ) {
815117ad 1425 /* attach to the founded aggregator */
1da177e4 1426 port->aggregator = aggregator;
128ea6c3
BD		 1427 port->actor_port_aggregator_identifier =
1428 port->aggregator->aggregator_identifier;
1429 port->next_port_in_aggregator = aggregator->lag_ports;
1da177e4 1430 port->aggregator->num_of_ports++;
128ea6c3 1431 aggregator->lag_ports = port;
d4471f5e
VF		 1432 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1433 port->actor_port_number,
1434 port->aggregator->aggregator_identifier);
1da177e4 1435
3bf2d28a 1436 /* mark this port as selected */
1da177e4
LT		 1437 port->sm_vars |= AD_PORT_SELECTED;
1438 found = 1;
1439 break;
1440 }
1441 }
1442
3bf2d28a
VF		 1443 /* the port couldn't find an aggregator - attach it to a new
1444 * aggregator
1445 */
1da177e4
LT		 1446 if (!found) {
1447 if (free_aggregator) {
3bf2d28a 1448 /* assign port a new aggregator */
1da177e4 1449 port->aggregator = free_aggregator;
128ea6c3
BD		 1450 port->actor_port_aggregator_identifier =
1451 port->aggregator->aggregator_identifier;
1da177e4 1452
3bf2d28a
VF		 1453 /* update the new aggregator's parameters
1454 * if port was responsed from the end-user
1455 */
cb8dda90 1456 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
7bfc4753 1457 /* if port is full duplex */
1624db7b 1458 port->aggregator->is_individual = false;
7bfc4753 1459 else
1624db7b 1460 port->aggregator->is_individual = true;
1da177e4 1461
c3cd9ee1
MB		 1462 port->aggregator->actor_admin_aggregator_key =
1463 port->actor_admin_port_key;
1464 port->aggregator->actor_oper_aggregator_key =
1465 port->actor_oper_port_key;
128ea6c3
BD		 1466 port->aggregator->partner_system =
1467 port->partner_oper.system;
1468 port->aggregator->partner_system_priority =
1469 port->partner_oper.system_priority;
1055c9ab 1470 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1471 port->aggregator->receive_state = 1;
1472 port->aggregator->transmit_state = 1;
1473 port->aggregator->lag_ports = port;
1474 port->aggregator->num_of_ports++;
1475
3bf2d28a 1476 /* mark this port as selected */
1da177e4
LT		 1477 port->sm_vars |= AD_PORT_SELECTED;
1478
d4471f5e
VF		 1479 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1480 port->actor_port_number,
1481 port->aggregator->aggregator_identifier);
1da177e4 1482 } else {
d4471f5e 1483 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1da177e4
LT		 1484 port->actor_port_number, port->slave->dev->name);
1485 }
1486 }
3bf2d28a
VF		 1487 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1488 * in all aggregator's ports, else set ready=FALSE in all
1489 * aggregator's ports
1490 */
1491 __set_agg_ports_ready(port->aggregator,
1492 __agg_ports_are_ready(port->aggregator));
1da177e4 1493
fd989c83 1494 aggregator = __get_first_agg(port);
ee637714 1495 ad_agg_selection_logic(aggregator, update_slave_arr);
63b46242
WK		 1496
1497 if (!port->aggregator->is_active)
1498 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
fd989c83
JV		 1499}
1500
3bf2d28a 1501/* Decide if "agg" is a better choice for the new active aggregator that
fd989c83
JV		 1502 * the current best, according to the ad_select policy.
1503 */
1504static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1505 struct aggregator *curr)
1506{
3bf2d28a 1507 /* 0. If no best, select current.
fd989c83
JV		 1508 *
1509 * 1. If the current agg is not individual, and the best is
1510 * individual, select current.
1511 *
1512 * 2. If current agg is individual and the best is not, keep best.
1513 *
1514 * 3. Therefore, current and best are both individual or both not
1515 * individual, so:
1516 *
1517 * 3a. If current agg partner replied, and best agg partner did not,
1518 * select current.
1519 *
1520 * 3b. If current agg partner did not reply and best agg partner
1521 * did reply, keep best.
1522 *
1523 * 4. Therefore, current and best both have partner replies or
1524 * both do not, so perform selection policy:
1525 *
1526 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1527 * select by bandwidth.
1528 *
1529 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1530 */
1531 if (!best)
1532 return curr;
1533
1534 if (!curr->is_individual && best->is_individual)
1535 return curr;
1536
1537 if (curr->is_individual && !best->is_individual)
1538 return best;
1539
1540 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1541 return curr;
1542
1543 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1544 return best;
1545
1546 switch (__get_agg_selection_mode(curr->lag_ports)) {
1547 case BOND_AD_COUNT:
0622cab0 1548 if (__agg_active_ports(curr) > __agg_active_ports(best))
fd989c83
JV		 1549 return curr;
1550
0622cab0 1551 if (__agg_active_ports(curr) < __agg_active_ports(best))
fd989c83
JV		 1552 return best;
1553
1554 /*FALLTHROUGH*/
1555 case BOND_AD_STABLE:
1556 case BOND_AD_BANDWIDTH:
1557 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1558 return curr;
1559
1560 break;
1561
1562 default:
d4471f5e
VF		 1563 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1564 curr->slave->bond->dev->name,
1565 __get_agg_selection_mode(curr->lag_ports));
fd989c83 1566 break;
1da177e4 1567 }
fd989c83
JV		 1568
1569 return best;
1da177e4
LT		 1570}
1571
4cd6fe1c
SH		 1572static int agg_device_up(const struct aggregator *agg)
1573{
2430af8b 1574 struct port *port = agg->lag_ports;
3bf2d28a 1575
2430af8b
JB		 1576 if (!port)
1577 return 0;
3bf2d28a 1578
0622cab0
JV		 1579 for (port = agg->lag_ports; port;
1580 port = port->next_port_in_aggregator) {
1581 if (netif_running(port->slave->dev) &&
1582 netif_carrier_ok(port->slave->dev))
1583 return 1;
1584 }
1585
1586 return 0;
4cd6fe1c
SH		 1587}
1588
1da177e4
LT		 1589/**
1590 * ad_agg_selection_logic - select an aggregation group for a team
1591 * @aggregator: the aggregator we're looking at
ee637714 1592 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1593 *
1594 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1595 *
1596 * The logic of this function is to select the aggregator according to
1597 * the ad_select policy:
1598 *
1599 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1600 * it, and to reselect the active aggregator only if the previous
1601 * aggregator has no more ports related to it.
1602 *
1603 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1604 * bandwidth, and reselect whenever a link state change takes place or the
1605 * set of slaves in the bond changes.
1606 *
1607 * BOND_AD_COUNT: select the aggregator with largest number of ports
1608 * (slaves), and reselect whenever a link state change takes place or the
1609 * set of slaves in the bond changes.
1da177e4
LT		 1610 *
1611 * FIXME: this function MUST be called with the first agg in the bond, or
1612 * __get_active_agg() won't work correctly. This function should be better
1613 * called with the bond itself, and retrieve the first agg from it.
1614 */
ee637714
MB		 1615static void ad_agg_selection_logic(struct aggregator *agg,
1616 bool *update_slave_arr)
1da177e4 1617{
fd989c83 1618 struct aggregator *best, *active, *origin;
bef1fcce
VF		 1619 struct bonding *bond = agg->slave->bond;
1620 struct list_head *iter;
1621 struct slave *slave;
1da177e4 1622 struct port *port;
1da177e4 1623
49b7624e 1624 rcu_read_lock();
fd989c83 1625 origin = agg;
fd989c83 1626 active = __get_active_agg(agg);
4cd6fe1c 1627 best = (active && agg_device_up(active)) ? active : NULL;
1da177e4 1628
be79bd04 1629 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 1630 agg = &(SLAVE_AD_INFO(slave)->aggregator);
bef1fcce 1631
fd989c83
JV		 1632 agg->is_active = 0;
1633
0622cab0 1634 if (__agg_active_ports(agg) && agg_device_up(agg))
fd989c83 1635 best = ad_agg_selection_test(best, agg);
bef1fcce 1636 }
fd989c83
JV		 1637
1638 if (best &&
1639 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
3bf2d28a 1640 /* For the STABLE policy, don't replace the old active
fd989c83
JV		 1641 * aggregator if it's still active (it has an answering
1642 * partner) or if both the best and active don't have an
1643 * answering partner.
1644 */
1645 if (active && active->lag_ports &&
0622cab0 1646 __agg_active_ports(active) &&
fd989c83 1647 (__agg_has_partner(active) ||
3bf2d28a
VF		 1648 (!__agg_has_partner(active) &&
1649 !__agg_has_partner(best)))) {
fd989c83
JV		 1650 if (!(!active->actor_oper_aggregator_key &&
1651 best->actor_oper_aggregator_key)) {
1652 best = NULL;
1653 active->is_active = 1;
1da177e4
LT		 1654 }
1655 }
fd989c83 1656 }
1da177e4 1657
fd989c83
JV		 1658 if (best && (best == active)) {
1659 best = NULL;
1660 active->is_active = 1;
1da177e4
LT		 1661 }
1662
be79bd04 1663 /* if there is new best aggregator, activate it */
fd989c83 1664 if (best) {
d4471f5e
VF		 1665 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1666 best->aggregator_identifier, best->num_of_ports,
1667 best->actor_oper_aggregator_key,
1668 best->partner_oper_aggregator_key,
1669 best->is_individual, best->is_active);
1670 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1671 best->lag_ports, best->slave,
1672 best->slave ? best->slave->dev->name : "NULL");
fd989c83 1673
be79bd04 1674 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 1675 agg = &(SLAVE_AD_INFO(slave)->aggregator);
fd989c83 1676
d4471f5e
VF		 1677 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1678 agg->aggregator_identifier, agg->num_of_ports,
1679 agg->actor_oper_aggregator_key,
1680 agg->partner_oper_aggregator_key,
1681 agg->is_individual, agg->is_active);
1da177e4
LT		 1682 }
1683
be79bd04 1684 /* check if any partner replys */
fd989c83 1685 if (best->is_individual) {
d4471f5e
VF		 1686 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1687 best->slave ?
1688 best->slave->bond->dev->name : "NULL");
1da177e4
LT		 1689 }
1690
fd989c83 1691 best->is_active = 1;
d4471f5e
VF		 1692 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1693 best->aggregator_identifier);
1694 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1695 best->aggregator_identifier, best->num_of_ports,
1696 best->actor_oper_aggregator_key,
1697 best->partner_oper_aggregator_key,
1698 best->is_individual, best->is_active);
1da177e4 1699
3bf2d28a
VF		 1700 /* disable the ports that were related to the former
1701 * active_aggregator
1702 */
fd989c83
JV		 1703 if (active) {
1704 for (port = active->lag_ports; port;
1705 port = port->next_port_in_aggregator) {
1da177e4
LT		 1706 __disable_port(port);
1707 }
1708 }
ee637714
MB		 1709 /* Slave array needs update. */
1710 *update_slave_arr = true;
1da177e4
LT		 1711 }
1712
3bf2d28a 1713 /* if the selected aggregator is of join individuals
fd989c83
JV		 1714 * (partner_system is NULL), enable their ports
1715 */
1716 active = __get_active_agg(origin);
1da177e4 1717
fd989c83
JV		 1718 if (active) {
1719 if (!__agg_has_partner(active)) {
1720 for (port = active->lag_ports; port;
1721 port = port->next_port_in_aggregator) {
1da177e4
LT		 1722 __enable_port(port);
1723 }
1724 }
1725 }
fd989c83 1726
be79bd04 1727 rcu_read_unlock();
1728
bef1fcce 1729 bond_3ad_set_carrier(bond);
1da177e4
LT		 1730}
1731
1732/**
1733 * ad_clear_agg - clear a given aggregator's parameters
1734 * @aggregator: the aggregator we're looking at
1da177e4
LT		 1735 */
1736static void ad_clear_agg(struct aggregator *aggregator)
1737{
1738 if (aggregator) {
1624db7b 1739 aggregator->is_individual = false;
1da177e4
LT		 1740 aggregator->actor_admin_aggregator_key = 0;
1741 aggregator->actor_oper_aggregator_key = 0;
1742 aggregator->partner_system = null_mac_addr;
1743 aggregator->partner_system_priority = 0;
1744 aggregator->partner_oper_aggregator_key = 0;
1745 aggregator->receive_state = 0;
1746 aggregator->transmit_state = 0;
1747 aggregator->lag_ports = NULL;
1748 aggregator->is_active = 0;
1749 aggregator->num_of_ports = 0;
a4aee5c8
JP		 1750 pr_debug("LAG %d was cleared\n",
1751 aggregator->aggregator_identifier);
1da177e4
LT		 1752 }
1753}
1754
1755/**
1756 * ad_initialize_agg - initialize a given aggregator's parameters
1757 * @aggregator: the aggregator we're looking at
1da177e4
LT		 1758 */
1759static void ad_initialize_agg(struct aggregator *aggregator)
1760{
1761 if (aggregator) {
1762 ad_clear_agg(aggregator);
1763
1764 aggregator->aggregator_mac_address = null_mac_addr;
1765 aggregator->aggregator_identifier = 0;
1766 aggregator->slave = NULL;
1767 }
1768}
1769
1770/**
1771 * ad_initialize_port - initialize a given port's parameters
1772 * @aggregator: the aggregator we're looking at
1773 * @lacp_fast: boolean. whether fast periodic should be used
1da177e4
LT		 1774 */
1775static void ad_initialize_port(struct port *port, int lacp_fast)
1776{
c7e703d0
HE		 1777 static const struct port_params tmpl = {
1778 .system_priority = 0xffff,
1779 .key = 1,
1780 .port_number = 1,
1781 .port_priority = 0xff,
1782 .port_state = 1,
1783 };
7addeef6
HE		 1784 static const struct lacpdu lacpdu = {
1785 .subtype = 0x01,
1786 .version_number = 0x01,
1787 .tlv_type_actor_info = 0x01,
1788 .actor_information_length = 0x14,
1789 .tlv_type_partner_info = 0x02,
1790 .partner_information_length = 0x14,
1791 .tlv_type_collector_info = 0x03,
1792 .collector_information_length = 0x10,
1793 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1794 };
c7e703d0 1795
1da177e4 1796 if (port) {
1da177e4 1797 port->actor_port_priority = 0xff;
1da177e4 1798 port->actor_port_aggregator_identifier = 0;
d238d458 1799 port->ntt = false;
3bf2d28a
VF		 1800 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1801 AD_STATE_LACP_ACTIVITY;
1802 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1803 AD_STATE_LACP_ACTIVITY;
1da177e4 1804
7bfc4753 1805 if (lacp_fast)
1da177e4 1806 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1da177e4 1807
c7e703d0
HE		 1808 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1809 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1810
f48127b6 1811 port->is_enabled = true;
3bf2d28a 1812 /* private parameters */
19a12049 1813 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1da177e4
LT		 1814 port->sm_rx_state = 0;
1815 port->sm_rx_timer_counter = 0;
1816 port->sm_periodic_state = 0;
1817 port->sm_periodic_timer_counter = 0;
1818 port->sm_mux_state = 0;
1819 port->sm_mux_timer_counter = 0;
1820 port->sm_tx_state = 0;
1da177e4
LT		 1821 port->aggregator = NULL;
1822 port->next_port_in_aggregator = NULL;
1823 port->transaction_id = 0;
1824
14c9551a
MB		 1825 port->sm_churn_actor_timer_counter = 0;
1826 port->sm_churn_actor_state = 0;
1827 port->churn_actor_count = 0;
1828 port->sm_churn_partner_timer_counter = 0;
1829 port->sm_churn_partner_state = 0;
1830 port->churn_partner_count = 0;
1831
7addeef6 1832 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1da177e4
LT		 1833 }
1834}
1835
1836/**
1837 * ad_enable_collecting_distributing - enable a port's transmit/receive
1838 * @port: the port we're looking at
ee637714 1839 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1840 *
1841 * Enable @port if it's in an active aggregator
1842 */
ee637714
MB		 1843static void ad_enable_collecting_distributing(struct port *port,
1844 bool *update_slave_arr)
1da177e4
LT		 1845{
1846 if (port->aggregator->is_active) {
a4aee5c8
JP		 1847 pr_debug("Enabling port %d(LAG %d)\n",
1848 port->actor_port_number,
1849 port->aggregator->aggregator_identifier);
1da177e4 1850 __enable_port(port);
ee637714
MB		 1851 /* Slave array needs update */
1852 *update_slave_arr = true;
1da177e4
LT		 1853 }
1854}
1855
1856/**
1857 * ad_disable_collecting_distributing - disable a port's transmit/receive
1858 * @port: the port we're looking at
ee637714 1859 * @update_slave_arr: Does slave array need update?
1da177e4 1860 */
ee637714
MB		 1861static void ad_disable_collecting_distributing(struct port *port,
1862 bool *update_slave_arr)
1da177e4 1863{
3bf2d28a
VF		 1864 if (port->aggregator &&
1865 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1866 &(null_mac_addr))) {
a4aee5c8
JP		 1867 pr_debug("Disabling port %d(LAG %d)\n",
1868 port->actor_port_number,
1869 port->aggregator->aggregator_identifier);
1da177e4 1870 __disable_port(port);
ee637714
MB		 1871 /* Slave array needs an update */
1872 *update_slave_arr = true;
1da177e4
LT		 1873 }
1874}
1875
1da177e4
LT		 1876/**
1877 * ad_marker_info_received - handle receive of a Marker information frame
1878 * @marker_info: Marker info received
1879 * @port: the port we're looking at
1da177e4 1880 */
1c3f0b8e
MD		 1881static void ad_marker_info_received(struct bond_marker *marker_info,
1882 struct port *port)
1da177e4 1883{
1c3f0b8e 1884 struct bond_marker marker;
1da177e4 1885
3bf2d28a 1886 /* copy the received marker data to the response marker */
1c3f0b8e 1887 memcpy(&marker, marker_info, sizeof(struct bond_marker));
3bf2d28a 1888 /* change the marker subtype to marker response */
128ea6c3 1889 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1da177e4 1890
3bf2d28a 1891 /* send the marker response */
1da177e4 1892 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1893 pr_debug("Sent Marker Response on port %d\n",
1894 port->actor_port_number);
1da177e4
LT		 1895 }
1896}
1897
1898/**
1899 * ad_marker_response_received - handle receive of a marker response frame
1900 * @marker: marker PDU received
1901 * @port: the port we're looking at
1902 *
1903 * This function does nothing since we decided not to implement send and handle
1904 * response for marker PDU's, in this stage, but only to respond to marker
1905 * information.
1906 */
1c3f0b8e 1907static void ad_marker_response_received(struct bond_marker *marker,
3bf2d28a 1908 struct port *port)
1da177e4 1909{
3bf2d28a 1910 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1da177e4
LT		 1911}
1912
3bf2d28a 1913/* ========= AD exported functions to the main bonding code ========= */
1da177e4 1914
3bf2d28a 1915/* Check aggregators status in team every T seconds */
1da177e4
LT		 1916#define AD_AGGREGATOR_SELECTION_TIMER 8
1917
3bf2d28a
VF		 1918/**
1919 * bond_3ad_initiate_agg_selection - initate aggregator selection
1920 * @bond: bonding struct
fd989c83
JV		 1921 *
1922 * Set the aggregation selection timer, to initiate an agg selection in
1923 * the very near future. Called during first initialization, and during
1924 * any down to up transitions of the bond.
1925 */
1926void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1927{
1928 BOND_AD_INFO(bond).agg_select_timer = timeout;
fd989c83
JV		 1929}
1930
1da177e4
LT		 1931/**
1932 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1933 * @bond: bonding struct to work on
1934 * @tick_resolution: tick duration (millisecond resolution)
1da177e4
LT		 1935 *
1936 * Can be called only after the mac address of the bond is set.
1937 */
56d00c67 1938void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
3a6d54c5 1939{
815117ad 1940 /* check that the bond is not initialized yet */
1941 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
3a6d54c5 1942 bond->dev->dev_addr)) {
1da177e4 1943
163c8ff3 1944 BOND_AD_INFO(bond).aggregator_identifier = 0;
1da177e4 1945
6791e466
MB		 1946 BOND_AD_INFO(bond).system.sys_priority =
1947 bond->params.ad_actor_sys_prio;
74514957
MB		 1948 if (is_zero_ether_addr(bond->params.ad_actor_system))
1949 BOND_AD_INFO(bond).system.sys_mac_addr =
1950 *((struct mac_addr *)bond->dev->dev_addr);
1951 else
1952 BOND_AD_INFO(bond).system.sys_mac_addr =
1953 *((struct mac_addr *)bond->params.ad_actor_system);
1da177e4 1954
3bf2d28a
VF		 1955 /* initialize how many times this module is called in one
1956 * second (should be about every 100ms)
1957 */
1da177e4
LT		 1958 ad_ticks_per_sec = tick_resolution;
1959
fd989c83
JV		 1960 bond_3ad_initiate_agg_selection(bond,
1961 AD_AGGREGATOR_SELECTION_TIMER *
1962 ad_ticks_per_sec);
1da177e4
LT		 1963 }
1964}
1965
1966/**
1967 * bond_3ad_bind_slave - initialize a slave's port
1968 * @slave: slave struct to work on
1969 *
1970 * Returns: 0 on success
1971 * < 0 on error
1972 */
359632e5 1973void bond_3ad_bind_slave(struct slave *slave)
1da177e4
LT		 1974{
1975 struct bonding *bond = bond_get_bond_by_slave(slave);
1976 struct port *port;
1977 struct aggregator *aggregator;
1978
359632e5 1979 /* check that the slave has not been initialized yet. */
3fdddd85 1980 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1da177e4 1981
359632e5 1982 /* port initialization */
3fdddd85 1983 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 1984
bf0239a9 1985 ad_initialize_port(port, bond->params.lacp_fast);
1da177e4
LT		 1986
1987 port->slave = slave;
3fdddd85 1988 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
d22a5fc0
MB		 1989 /* key is determined according to the link speed, duplex and
1990 * user key
359632e5 1991 */
d22a5fc0 1992 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
7bb11dc9 1993 ad_update_actor_keys(port, false);
359632e5 1994 /* actor system is the bond's system */
5ee14e6d 1995 __ad_actor_update_port(port);
3bf2d28a
VF		 1996 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1997 * lacpdu's are sent in one second)
1998 */
1da177e4 1999 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 2000
2001 __disable_port(port);
1da177e4 2002
359632e5 2003 /* aggregator initialization */
3fdddd85 2004 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4
LT		 2005
2006 ad_initialize_agg(aggregator);
2007
2008 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
163c8ff3 2009 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1da177e4
LT		 2010 aggregator->slave = slave;
2011 aggregator->is_active = 0;
2012 aggregator->num_of_ports = 0;
2013 }
1da177e4
LT		 2014}
2015
2016/**
2017 * bond_3ad_unbind_slave - deinitialize a slave's port
2018 * @slave: slave struct to work on
2019 *
2020 * Search for the aggregator that is related to this port, remove the
2021 * aggregator and assign another aggregator for other port related to it
2022 * (if any), and remove the port.
2023 */
2024void bond_3ad_unbind_slave(struct slave *slave)
2025{
2026 struct port *port, *prev_port, *temp_port;
2027 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2028 int select_new_active_agg = 0;
0b088264
VF		 2029 struct bonding *bond = slave->bond;
2030 struct slave *slave_iter;
2031 struct list_head *iter;
ee637714 2032 bool dummy_slave_update; /* Ignore this value as caller updates array */
a361c83c 2033
e470259f
NA		 2034 /* Sync against bond_3ad_state_machine_handler() */
2035 spin_lock_bh(&bond->mode_lock);
3fdddd85 2036 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2037 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2038
3bf2d28a 2039 /* if slave is null, the whole port is not initialized */
1da177e4 2040 if (!port->slave) {
d4471f5e
VF		 2041 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2042 slave->dev->name);
e470259f 2043 goto out;
1da177e4
LT		 2044 }
2045
d4471f5e
VF		 2046 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2047 aggregator->aggregator_identifier);
1da177e4
LT		 2048
2049 /* Tell the partner that this port is not suitable for aggregation */
2050 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2051 __update_lacpdu_from_port(port);
2052 ad_lacpdu_send(port);
2053
3bf2d28a 2054 /* check if this aggregator is occupied */
1da177e4 2055 if (aggregator->lag_ports) {
3bf2d28a
VF		 2056 /* check if there are other ports related to this aggregator
2057 * except the port related to this slave(thats ensure us that
2058 * there is a reason to search for new aggregator, and that we
2059 * will find one
2060 */
2061 if ((aggregator->lag_ports != port) ||
2062 (aggregator->lag_ports->next_port_in_aggregator)) {
2063 /* find new aggregator for the related port(s) */
0b088264 2064 bond_for_each_slave(bond, slave_iter, iter) {
3fdddd85 2065 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
3bf2d28a
VF		 2066 /* if the new aggregator is empty, or it is
2067 * connected to our port only
2068 */
2069 if (!new_aggregator->lag_ports ||
2070 ((new_aggregator->lag_ports == port) &&
2071 !new_aggregator->lag_ports->next_port_in_aggregator))
1da177e4 2072 break;
1da177e4 2073 }
0b088264
VF		 2074 if (!slave_iter)
2075 new_aggregator = NULL;
3bf2d28a
VF		 2076
2077 /* if new aggregator found, copy the aggregator's
2078 * parameters and connect the related lag_ports to the
2079 * new aggregator
2080 */
1da177e4 2081 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
d4471f5e
VF		 2082 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2083 aggregator->aggregator_identifier,
2084 new_aggregator->aggregator_identifier);
1da177e4 2085
3bf2d28a
VF		 2086 if ((new_aggregator->lag_ports == port) &&
2087 new_aggregator->is_active) {
d4471f5e 2088 netdev_info(bond->dev, "Removing an active aggregator\n");
1da177e4
LT		 2089 select_new_active_agg = 1;
2090 }
2091
2092 new_aggregator->is_individual = aggregator->is_individual;
2093 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2094 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2095 new_aggregator->partner_system = aggregator->partner_system;
2096 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2097 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2098 new_aggregator->receive_state = aggregator->receive_state;
2099 new_aggregator->transmit_state = aggregator->transmit_state;
2100 new_aggregator->lag_ports = aggregator->lag_ports;
2101 new_aggregator->is_active = aggregator->is_active;
2102 new_aggregator->num_of_ports = aggregator->num_of_ports;
2103
3bf2d28a
VF		 2104 /* update the information that is written on
2105 * the ports about the aggregator
2106 */
128ea6c3
BD		 2107 for (temp_port = aggregator->lag_ports; temp_port;
2108 temp_port = temp_port->next_port_in_aggregator) {
2109 temp_port->aggregator = new_aggregator;
1da177e4
LT		 2110 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2111 }
2112
1da177e4 2113 ad_clear_agg(aggregator);
a361c83c 2114
7bfc4753 2115 if (select_new_active_agg)
ee637714
MB		 2116 ad_agg_selection_logic(__get_first_agg(port),
2117 &dummy_slave_update);
1da177e4 2118 } else {
d4471f5e 2119 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
1da177e4 2120 }
3bf2d28a
VF		 2121 } else {
2122 /* in case that the only port related to this
2123 * aggregator is the one we want to remove
2124 */
1da177e4 2125 select_new_active_agg = aggregator->is_active;
1da177e4
LT		 2126 ad_clear_agg(aggregator);
2127 if (select_new_active_agg) {
d4471f5e 2128 netdev_info(bond->dev, "Removing an active aggregator\n");
3bf2d28a 2129 /* select new active aggregator */
74684493
VF		 2130 temp_aggregator = __get_first_agg(port);
2131 if (temp_aggregator)
ee637714
MB		 2132 ad_agg_selection_logic(temp_aggregator,
2133 &dummy_slave_update);
1da177e4
LT		 2134 }
2135 }
2136 }
2137
d4471f5e 2138 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
3bf2d28a
VF		 2139
2140 /* find the aggregator that this port is connected to */
0b088264 2141 bond_for_each_slave(bond, slave_iter, iter) {
3fdddd85 2142 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
1da177e4 2143 prev_port = NULL;
3bf2d28a 2144 /* search the port in the aggregator's related ports */
128ea6c3
BD		 2145 for (temp_port = temp_aggregator->lag_ports; temp_port;
2146 prev_port = temp_port,
3bf2d28a
VF		 2147 temp_port = temp_port->next_port_in_aggregator) {
2148 if (temp_port == port) {
2149 /* the aggregator found - detach the port from
2150 * this aggregator
2151 */
7bfc4753 2152 if (prev_port)
1da177e4 2153 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
7bfc4753 2154 else
1da177e4 2155 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
1da177e4 2156 temp_aggregator->num_of_ports--;
0622cab0 2157 if (__agg_active_ports(temp_aggregator) == 0) {
1da177e4 2158 select_new_active_agg = temp_aggregator->is_active;
1da177e4
LT		 2159 ad_clear_agg(temp_aggregator);
2160 if (select_new_active_agg) {
d4471f5e 2161 netdev_info(bond->dev, "Removing an active aggregator\n");
3bf2d28a 2162 /* select new active aggregator */
ee637714
MB		 2163 ad_agg_selection_logic(__get_first_agg(port),
2164 &dummy_slave_update);
1da177e4
LT		 2165 }
2166 }
2167 break;
2168 }
2169 }
2170 }
128ea6c3 2171 port->slave = NULL;
e470259f
NA		 2172
2173out:
2174 spin_unlock_bh(&bond->mode_lock);
1da177e4
LT		 2175}
2176
5ee14e6d
NA		 2177/**
2178 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2179 * @bond: bonding struct to work on
2180 *
2181 * If an ad_actor setting gets changed we need to update the individual port
2182 * settings so the bond device will use the new values when it gets upped.
2183 */
2184void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2185{
2186 struct list_head *iter;
2187 struct slave *slave;
2188
2189 ASSERT_RTNL();
2190
2191 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2192 if (is_zero_ether_addr(bond->params.ad_actor_system))
2193 BOND_AD_INFO(bond).system.sys_mac_addr =
2194 *((struct mac_addr *)bond->dev->dev_addr);
2195 else
2196 BOND_AD_INFO(bond).system.sys_mac_addr =
2197 *((struct mac_addr *)bond->params.ad_actor_system);
2198
2199 spin_lock_bh(&bond->mode_lock);
7f20cd25
NA		 2200 bond_for_each_slave(bond, slave, iter) {
2201 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2202
2203 __ad_actor_update_port(port);
2204 port->ntt = true;
2205 }
5ee14e6d
NA		 2206 spin_unlock_bh(&bond->mode_lock);
2207}
2208
1da177e4
LT		 2209/**
2210 * bond_3ad_state_machine_handler - handle state machines timeout
2211 * @bond: bonding struct to work on
2212 *
2213 * The state machine handling concept in this module is to check every tick
2214 * which state machine should operate any function. The execution order is
2215 * round robin, so when we have an interaction between state machines, the
2216 * reply of one to each other might be delayed until next tick.
2217 *
2218 * This function also complete the initialization when the agg_select_timer
2219 * times out, and it selects an aggregator for the ports that are yet not
2220 * related to any aggregator, and selects the active aggregator for a bond.
2221 */
1b76b316 2222void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2223{
1b76b316
JV		 2224 struct bonding *bond = container_of(work, struct bonding,
2225 ad_work.work);
1da177e4 2226 struct aggregator *aggregator;
3c4c88a1
VF		 2227 struct list_head *iter;
2228 struct slave *slave;
2229 struct port *port;
5e5b0665 2230 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
ee637714 2231 bool update_slave_arr = false;
1da177e4 2232
e470259f
NA		 2233 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2234 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2235 * concurrently due to incoming LACPDU as well.
2236 */
b7435628 2237 spin_lock_bh(&bond->mode_lock);
be79bd04 2238 rcu_read_lock();
1f2cd845 2239
be79bd04 2240 /* check if there are any slaves */
0965a1f3 2241 if (!bond_has_slaves(bond))
1da177e4 2242 goto re_arm;
1da177e4 2243
be79bd04 2244 /* check if agg_select_timer timer after initialize is timed out */
3bf2d28a
VF		 2245 if (BOND_AD_INFO(bond).agg_select_timer &&
2246 !(--BOND_AD_INFO(bond).agg_select_timer)) {
be79bd04 2247 slave = bond_first_slave_rcu(bond);
3fdddd85 2248 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
fe9323da 2249
be79bd04 2250 /* select the active aggregator for the bond */
fe9323da 2251 if (port) {
1da177e4 2252 if (!port->slave) {
d4471f5e
VF		 2253 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2254 bond->dev->name);
1da177e4
LT		 2255 goto re_arm;
2256 }
2257
2258 aggregator = __get_first_agg(port);
ee637714 2259 ad_agg_selection_logic(aggregator, &update_slave_arr);
1da177e4 2260 }
f0c76d61 2261 bond_3ad_set_carrier(bond);
1da177e4
LT		 2262 }
2263
be79bd04 2264 /* for each port run the state machines */
2265 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 2266 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2267 if (!port->slave) {
d4471f5e 2268 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
86a2b9cf 2269 bond->dev->name);
1da177e4
LT		 2270 goto re_arm;
2271 }
2272
2273 ad_rx_machine(NULL, port);
2274 ad_periodic_machine(port);
ee637714
MB		 2275 ad_port_selection_logic(port, &update_slave_arr);
2276 ad_mux_machine(port, &update_slave_arr);
1da177e4 2277 ad_tx_machine(port);
14c9551a 2278 ad_churn_machine(port);
1da177e4 2279
be79bd04 2280 /* turn off the BEGIN bit, since we already handled it */
7bfc4753 2281 if (port->sm_vars & AD_PORT_BEGIN)
1da177e4 2282 port->sm_vars &= ~AD_PORT_BEGIN;
1da177e4
LT		 2283 }
2284
2285re_arm:
5e5b0665 2286 bond_for_each_slave_rcu(bond, slave, iter) {
2287 if (slave->should_notify) {
2288 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2289 break;
2290 }
2291 }
be79bd04 2292 rcu_read_unlock();
b7435628 2293 spin_unlock_bh(&bond->mode_lock);
5e5b0665 2294
ee637714
MB		 2295 if (update_slave_arr)
2296 bond_slave_arr_work_rearm(bond, 0);
2297
5e5b0665 2298 if (should_notify_rtnl && rtnl_trylock()) {
b0929915 2299 bond_slave_state_notify(bond);
5e5b0665 2300 rtnl_unlock();
2301 }
be79bd04 2302 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1da177e4
LT		 2303}
2304
2305/**
2306 * bond_3ad_rx_indication - handle a received frame
2307 * @lacpdu: received lacpdu
2308 * @slave: slave struct to work on
2309 * @length: length of the data received
2310 *
2311 * It is assumed that frames that were sent on this NIC don't returned as new
2312 * received frames (loopback). Since only the payload is given to this
2313 * function, it check for loopback.
2314 */
3bf2d28a
VF		 2315static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2316 u16 length)
1da177e4
LT		 2317{
2318 struct port *port;
13a8e0c8 2319 int ret = RX_HANDLER_ANOTHER;
1da177e4
LT		 2320
2321 if (length >= sizeof(struct lacpdu)) {
2322
3fdddd85 2323 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4
LT		 2324
2325 if (!port->slave) {
d4471f5e
VF		 2326 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2327 slave->dev->name, slave->bond->dev->name);
13a8e0c8 2328 return ret;
1da177e4
LT		 2329 }
2330
2331 switch (lacpdu->subtype) {
2332 case AD_TYPE_LACPDU:
13a8e0c8 2333 ret = RX_HANDLER_CONSUMED;
2f637324
SA		 2334 netdev_dbg(slave->bond->dev,
2335 "Received LACPDU on port %d slave %s\n",
2336 port->actor_port_number,
2337 slave->dev->name);
16d79d7d 2338 /* Protect against concurrent state machines */
e470259f 2339 spin_lock(&slave->bond->mode_lock);
1da177e4 2340 ad_rx_machine(lacpdu, port);
e470259f 2341 spin_unlock(&slave->bond->mode_lock);
1da177e4
LT		 2342 break;
2343
2344 case AD_TYPE_MARKER:
13a8e0c8 2345 ret = RX_HANDLER_CONSUMED;
3bf2d28a
VF		 2346 /* No need to convert fields to Little Endian since we
2347 * don't use the marker's fields.
2348 */
1da177e4 2349
1c3f0b8e 2350 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2351 case AD_MARKER_INFORMATION_SUBTYPE:
d4471f5e
VF		 2352 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2353 port->actor_port_number);
1c3f0b8e 2354 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2355 break;
2356
2357 case AD_MARKER_RESPONSE_SUBTYPE:
d4471f5e
VF		 2358 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2359 port->actor_port_number);
1c3f0b8e 2360 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2361 break;
2362
2363 default:
d4471f5e
VF		 2364 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2365 port->actor_port_number);
1da177e4
LT		 2366 }
2367 }
2368 }
13a8e0c8 2369 return ret;
1da177e4
LT		 2370}
2371
7bb11dc9
MB		 2372/**
2373 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2374 * its current speed and duplex settings.
2375 *
2376 * @port: the port we'are looking at
2377 * @reset: Boolean to just reset the speed and the duplex part of the key
2378 *
2379 * The logic to change the oper / admin keys is:
2380 * (a) A full duplex port can participate in LACP with partner.
2381 * (b) When the speed is changed, LACP need to be reinitiated.
2382 */
2383static void ad_update_actor_keys(struct port *port, bool reset)
2384{
2385 u8 duplex = 0;
2386 u16 ospeed = 0, speed = 0;
2387 u16 old_oper_key = port->actor_oper_port_key;
2388
2389 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2390 if (!reset) {
2391 speed = __get_link_speed(port);
2392 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2393 duplex = __get_duplex(port);
2394 port->actor_admin_port_key |= (speed << 1) | duplex;
2395 }
2396 port->actor_oper_port_key = port->actor_admin_port_key;
2397
2398 if (old_oper_key != port->actor_oper_port_key) {
2399 /* Only 'duplex' port participates in LACP */
2400 if (duplex)
2401 port->sm_vars |= AD_PORT_LACP_ENABLED;
2402 else
2403 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2404
2405 if (!reset) {
2406 if (!speed) {
2407 netdev_err(port->slave->dev,
2408 "speed changed to 0 for port %s",
2409 port->slave->dev->name);
2410 } else if (duplex && ospeed != speed) {
2411 /* Speed change restarts LACP state-machine */
2412 port->sm_vars |= AD_PORT_BEGIN;
2413 }
2414 }
2415 }
2416}
2417
1da177e4 2418/**
52bc6716
MB		 2419 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2420 * change indication
1da177e4 2421 *
1da177e4
LT		 2422 * @slave: slave struct to work on
2423 *
2424 * Handle reselection of aggregator (if needed) for this port.
2425 */
52bc6716 2426void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
1da177e4
LT		 2427{
2428 struct port *port;
2429
3fdddd85 2430 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2431
bca44a73 2432 /* if slave is null, the whole port is not initialized */
1da177e4 2433 if (!port->slave) {
52bc6716
MB		 2434 netdev_warn(slave->bond->dev,
2435 "speed/duplex changed for uninitialized port %s\n",
d4471f5e 2436 slave->dev->name);
1da177e4
LT		 2437 return;
2438 }
2439
e470259f 2440 spin_lock_bh(&slave->bond->mode_lock);
7bb11dc9 2441 ad_update_actor_keys(port, false);
52bc6716 2442 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
2f637324 2443 port->actor_port_number, slave->dev->name);
e470259f 2444 spin_unlock_bh(&slave->bond->mode_lock);
1da177e4
LT		 2445}
2446
2447/**
2448 * bond_3ad_handle_link_change - handle a slave's link status change indication
2449 * @slave: slave struct to work on
2450 * @status: whether the link is now up or down
2451 *
2452 * Handle reselection of aggregator (if needed) for this port.
2453 */
2454void bond_3ad_handle_link_change(struct slave *slave, char link)
2455{
0622cab0 2456 struct aggregator *agg;
1da177e4 2457 struct port *port;
0622cab0 2458 bool dummy;
1da177e4 2459
3fdddd85 2460 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2461
108db736 2462 /* if slave is null, the whole port is not initialized */
1da177e4 2463 if (!port->slave) {
d4471f5e
VF		 2464 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2465 slave->dev->name);
1da177e4
LT		 2466 return;
2467 }
2468
e470259f 2469 spin_lock_bh(&slave->bond->mode_lock);
108db736 2470 /* on link down we are zeroing duplex and speed since
2471 * some of the adaptors(ce1000.lan) report full duplex/speed
2472 * instead of N/A(duplex) / 0(speed).
2473 *
2474 * on link up we are forcing recheck on the duplex and speed since
2475 * some of he adaptors(ce1000.lan) report.
2476 */
1da177e4 2477 if (link == BOND_LINK_UP) {
f48127b6 2478 port->is_enabled = true;
7bb11dc9 2479 ad_update_actor_keys(port, false);
1da177e4
LT		 2480 } else {
2481 /* link has failed */
f48127b6 2482 port->is_enabled = false;
7bb11dc9 2483 ad_update_actor_keys(port, true);
1da177e4 2484 }
0622cab0
JV		 2485 agg = __get_first_agg(port);
2486 ad_agg_selection_logic(agg, &dummy);
2487
d4471f5e
VF		 2488 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2489 port->actor_port_number,
2490 link == BOND_LINK_UP ? "UP" : "DOWN");
108db736 2491
e470259f 2492 spin_unlock_bh(&slave->bond->mode_lock);
ee637714
MB		 2493
2494 /* RTNL is held and mode_lock is released so it's safe
2495 * to update slave_array here.
2496 */
2497 bond_update_slave_arr(slave->bond, NULL);
1da177e4
LT		 2498}
2499
3bf2d28a
VF		 2500/**
2501 * bond_3ad_set_carrier - set link state for bonding master
2502 * @bond - bonding structure
2503 *
2504 * if we have an active aggregator, we're up, if not, we're down.
2505 * Presumes that we cannot have an active aggregator if there are
2506 * no slaves with link up.
ff59c456 2507 *
031ae4de
JV		 2508 * This behavior complies with IEEE 802.3 section 43.3.9.
2509 *
ff59c456
JV		 2510 * Called by bond_set_carrier(). Return zero if carrier state does not
2511 * change, nonzero if it does.
2512 */
2513int bond_3ad_set_carrier(struct bonding *bond)
2514{
655f8919 2515 struct aggregator *active;
dec1e90e 2516 struct slave *first_slave;
c1bc9644 2517 int ret = 1;
655f8919 2518
be79bd04 2519 rcu_read_lock();
2520 first_slave = bond_first_slave_rcu(bond);
c1bc9644
VF		 2521 if (!first_slave) {
2522 ret = 0;
2523 goto out;
2524 }
3fdddd85 2525 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
655f8919 2526 if (active) {
2527 /* are enough slaves available to consider link up? */
0622cab0 2528 if (__agg_active_ports(active) < bond->params.min_links) {
655f8919 2529 if (netif_carrier_ok(bond->dev)) {
2530 netif_carrier_off(bond->dev);
c1bc9644 2531 goto out;
655f8919 2532 }
2533 } else if (!netif_carrier_ok(bond->dev)) {
ff59c456 2534 netif_carrier_on(bond->dev);
c1bc9644 2535 goto out;
ff59c456 2536 }
c1bc9644 2537 } else if (netif_carrier_ok(bond->dev)) {
ff59c456 2538 netif_carrier_off(bond->dev);
ff59c456 2539 }
c1bc9644
VF		 2540out:
2541 rcu_read_unlock();
2542 return ret;
ff59c456
JV		 2543}
2544
1da177e4 2545/**
318debd8 2546 * __bond_3ad_get_active_agg_info - get information of the active aggregator
1da177e4
LT		 2547 * @bond: bonding struct to work on
2548 * @ad_info: ad_info struct to fill with the bond's info
2549 *
2550 * Returns: 0 on success
2551 * < 0 on error
2552 */
318debd8 2553int __bond_3ad_get_active_agg_info(struct bonding *bond,
2554 struct ad_info *ad_info)
1da177e4
LT		 2555{
2556 struct aggregator *aggregator = NULL;
3c4c88a1
VF		 2557 struct list_head *iter;
2558 struct slave *slave;
1da177e4
LT		 2559 struct port *port;
2560
47e91f56 2561 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 2562 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4
LT		 2563 if (port->aggregator && port->aggregator->is_active) {
2564 aggregator = port->aggregator;
2565 break;
2566 }
2567 }
2568
21f374c6
JP		 2569 if (!aggregator)
2570 return -1;
2571
2572 ad_info->aggregator_id = aggregator->aggregator_identifier;
2573 ad_info->ports = aggregator->num_of_ports;
2574 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2575 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2576 ether_addr_copy(ad_info->partner_system,
2577 aggregator->partner_system.mac_addr_value);
2578 return 0;
1da177e4
LT		 2579}
2580
318debd8 2581int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2582{
2583 int ret;
2584
47e91f56 2585 rcu_read_lock();
318debd8 2586 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
47e91f56 2587 rcu_read_unlock();
318debd8 2588
2589 return ret;
2590}
2591
de063b70
ED		 2592int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2593 struct slave *slave)
1da177e4 2594{
de063b70
ED		 2595 struct lacpdu *lacpdu, _lacpdu;
2596
3aba891d 2597 if (skb->protocol != PKT_TYPE_LACPDU)
86e74986 2598 return RX_HANDLER_ANOTHER;
b3053251 2599
bb54e589
MB		 2600 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2601 return RX_HANDLER_ANOTHER;
2602
de063b70
ED		 2603 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2604 if (!lacpdu)
86e74986 2605 return RX_HANDLER_ANOTHER;
ab12811c 2606
86e74986 2607 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
1da177e4 2608}
ba824a8b 2609
3bf2d28a
VF		 2610/**
2611 * bond_3ad_update_lacp_rate - change the lacp rate
2612 * @bond - bonding struct
2613 *
ba824a8b
PP		 2614 * When modify lacp_rate parameter via sysfs,
2615 * update actor_oper_port_state of each port.
2616 *
e470259f 2617 * Hold bond->mode_lock,
ba824a8b
PP		 2618 * so we can modify port->actor_oper_port_state,
2619 * no matter bond is up or down.
2620 */
2621void bond_3ad_update_lacp_rate(struct bonding *bond)
2622{
ba824a8b 2623 struct port *port = NULL;
9caff1e7 2624 struct list_head *iter;
c509316b 2625 struct slave *slave;
ba824a8b
PP		 2626 int lacp_fast;
2627
ba824a8b 2628 lacp_fast = bond->params.lacp_fast;
e470259f 2629 spin_lock_bh(&bond->mode_lock);
9caff1e7 2630 bond_for_each_slave(bond, slave, iter) {
3fdddd85 2631 port = &(SLAVE_AD_INFO(slave)->port);
ba824a8b
PP		 2632 if (lacp_fast)
2633 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2634 else
2635 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
ba824a8b 2636 }
e470259f 2637 spin_unlock_bh(&bond->mode_lock);
ba824a8b 2638}
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