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bonding: fix 802.3ad state sent to partner when unbinding slave
[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 92 AD_LINK_SPEED_2500MBPS,
c7c55067 93 AD_LINK_SPEED_5000MBPS,
424c3232 94 AD_LINK_SPEED_10000MBPS,
3fcd64cf 95 AD_LINK_SPEED_14000MBPS,
424c3232 96 AD_LINK_SPEED_20000MBPS,
19ddde1e 97 AD_LINK_SPEED_25000MBPS,
424c3232 98 AD_LINK_SPEED_40000MBPS,
c7c55067 99 AD_LINK_SPEED_50000MBPS,
3952af4d
JP		 100 AD_LINK_SPEED_56000MBPS,
101 AD_LINK_SPEED_100000MBPS,
cb8dda90 102};
1da177e4 103
815117ad 104/* compare MAC addresses */
105#define MAC_ADDRESS_EQUAL(A, B) \
106 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
1da177e4 107
f87fda00
ED		 108static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = {
109 0, 0, 0, 0, 0, 0
110};
1da177e4
LT		 111static u16 ad_ticks_per_sec;
112static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
113
f87fda00
ED		 114static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned =
115 MULTICAST_LACPDU_ADDR;
e4ac4320 116
3bf2d28a 117/* ================= main 802.3ad protocol functions ================== */
1da177e4 118static int ad_lacpdu_send(struct port *port);
1c3f0b8e 119static int ad_marker_send(struct port *port, struct bond_marker *marker);
ee637714 120static void ad_mux_machine(struct port *port, bool *update_slave_arr);
1da177e4
LT		 121static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
122static void ad_tx_machine(struct port *port);
123static void ad_periodic_machine(struct port *port);
ee637714
MB		 124static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
125static void ad_agg_selection_logic(struct aggregator *aggregator,
126 bool *update_slave_arr);
1da177e4
LT		 127static void ad_clear_agg(struct aggregator *aggregator);
128static void ad_initialize_agg(struct aggregator *aggregator);
129static void ad_initialize_port(struct port *port, int lacp_fast);
ee637714
MB		 130static void ad_enable_collecting_distributing(struct port *port,
131 bool *update_slave_arr);
132static void ad_disable_collecting_distributing(struct port *port,
133 bool *update_slave_arr);
3bf2d28a
VF		 134static void ad_marker_info_received(struct bond_marker *marker_info,
135 struct port *port);
136static void ad_marker_response_received(struct bond_marker *marker,
137 struct port *port);
7bb11dc9 138static void ad_update_actor_keys(struct port *port, bool reset);
1da177e4
LT		 139
140
3bf2d28a 141/* ================= api to bonding and kernel code ================== */
1da177e4
LT		 142
143/**
144 * __get_bond_by_port - get the port's bonding struct
145 * @port: the port we're looking at
146 *
147 * Return @port's bonding struct, or %NULL if it can't be found.
148 */
149static inline struct bonding *__get_bond_by_port(struct port *port)
150{
7bfc4753 151 if (port->slave == NULL)
1da177e4 152 return NULL;
1da177e4
LT		 153
154 return bond_get_bond_by_slave(port->slave);
155}
156
1da177e4
LT		 157/**
158 * __get_first_agg - get the first aggregator in the bond
159 * @bond: the bond we're looking at
160 *
161 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
162 * found.
768b9549 163 * The caller must hold RCU or RTNL lock.
1da177e4
LT		 164 */
165static inline struct aggregator *__get_first_agg(struct port *port)
166{
167 struct bonding *bond = __get_bond_by_port(port);
dec1e90e 168 struct slave *first_slave;
768b9549 169 struct aggregator *agg;
1da177e4 170
be79bd04 171 /* If there's no bond for this port, or bond has no slaves */
dec1e90e 172 if (bond == NULL)
1da177e4 173 return NULL;
3bf2d28a 174
be79bd04 175 rcu_read_lock();
176 first_slave = bond_first_slave_rcu(bond);
3fdddd85 177 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
be79bd04 178 rcu_read_unlock();
3bf2d28a 179
768b9549 180 return agg;
1da177e4
LT		 181}
182
3bf2d28a
VF		 183/**
184 * __agg_has_partner - see if we have a partner
185 * @agg: the agregator we're looking at
fd989c83
JV		 186 *
187 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
3bf2d28a 188 * address for the partner). Return 0 if not.
fd989c83
JV		 189 */
190static inline int __agg_has_partner(struct aggregator *agg)
191{
192 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
193}
194
1da177e4
LT		 195/**
196 * __disable_port - disable the port's slave
197 * @port: the port we're looking at
1da177e4
LT		 198 */
199static inline void __disable_port(struct port *port)
200{
5e5b0665 201 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
1da177e4
LT		 202}
203
204/**
205 * __enable_port - enable the port's slave, if it's up
206 * @port: the port we're looking at
1da177e4
LT		 207 */
208static inline void __enable_port(struct port *port)
209{
210 struct slave *slave = port->slave;
211
b6adc610 212 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
5e5b0665 213 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
1da177e4
LT		 214}
215
216/**
217 * __port_is_enabled - check if the port's slave is in active state
218 * @port: the port we're looking at
1da177e4
LT		 219 */
220static inline int __port_is_enabled(struct port *port)
221{
e30bc066 222 return bond_is_active_slave(port->slave);
1da177e4
LT		 223}
224
225/**
226 * __get_agg_selection_mode - get the aggregator selection mode
227 * @port: the port we're looking at
228 *
fd989c83 229 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 230 */
231static inline u32 __get_agg_selection_mode(struct port *port)
232{
233 struct bonding *bond = __get_bond_by_port(port);
234
7bfc4753 235 if (bond == NULL)
fd989c83 236 return BOND_AD_STABLE;
1da177e4 237
1a14fbcb 238 return bond->params.ad_select;
1da177e4
LT		 239}
240
241/**
242 * __check_agg_selection_timer - check if the selection timer has expired
243 * @port: the port we're looking at
1da177e4
LT		 244 */
245static inline int __check_agg_selection_timer(struct port *port)
246{
247 struct bonding *bond = __get_bond_by_port(port);
248
7bfc4753 249 if (bond == NULL)
1da177e4 250 return 0;
1da177e4
LT		 251
252 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
253}
254
1da177e4
LT		 255/**
256 * __get_link_speed - get a port's speed
257 * @port: the port we're looking at
258 *
cb8dda90 259 * Return @port's speed in 802.3ad enum format. i.e. one of:
1da177e4 260 * 0,
cb8dda90
JX		 261 * %AD_LINK_SPEED_10MBPS,
262 * %AD_LINK_SPEED_100MBPS,
263 * %AD_LINK_SPEED_1000MBPS,
424c3232 264 * %AD_LINK_SPEED_2500MBPS,
c7c55067 265 * %AD_LINK_SPEED_5000MBPS,
cb8dda90 266 * %AD_LINK_SPEED_10000MBPS
3fcd64cf 267 * %AD_LINK_SPEED_14000MBPS,
424c3232 268 * %AD_LINK_SPEED_20000MBPS
19ddde1e 269 * %AD_LINK_SPEED_25000MBPS
424c3232 270 * %AD_LINK_SPEED_40000MBPS
c7c55067 271 * %AD_LINK_SPEED_50000MBPS
424c3232 272 * %AD_LINK_SPEED_56000MBPS
3952af4d 273 * %AD_LINK_SPEED_100000MBPS
1da177e4
LT		 274 */
275static u16 __get_link_speed(struct port *port)
276{
277 struct slave *slave = port->slave;
278 u16 speed;
279
3bf2d28a
VF		 280 /* this if covers only a special case: when the configuration starts
281 * with link down, it sets the speed to 0.
282 * This is done in spite of the fact that the e100 driver reports 0
283 * to be compatible with MVT in the future.
284 */
7bfc4753 285 if (slave->link != BOND_LINK_UP)
128ea6c3 286 speed = 0;
7bfc4753 287 else {
1da177e4
LT		 288 switch (slave->speed) {
289 case SPEED_10:
cb8dda90 290 speed = AD_LINK_SPEED_10MBPS;
1da177e4
LT		 291 break;
292
293 case SPEED_100:
cb8dda90 294 speed = AD_LINK_SPEED_100MBPS;
1da177e4
LT		 295 break;
296
297 case SPEED_1000:
cb8dda90 298 speed = AD_LINK_SPEED_1000MBPS;
1da177e4
LT		 299 break;
300
424c3232
JX		 301 case SPEED_2500:
302 speed = AD_LINK_SPEED_2500MBPS;
303 break;
304
c7c55067
TC		 305 case SPEED_5000:
306 speed = AD_LINK_SPEED_5000MBPS;
307 break;
308
94dbffd5 309 case SPEED_10000:
cb8dda90 310 speed = AD_LINK_SPEED_10000MBPS;
94dbffd5
JV		 311 break;
312
3fcd64cf
ND		 313 case SPEED_14000:
314 speed = AD_LINK_SPEED_14000MBPS;
315 break;
316
424c3232
JX		 317 case SPEED_20000:
318 speed = AD_LINK_SPEED_20000MBPS;
319 break;
320
19ddde1e
JW		 321 case SPEED_25000:
322 speed = AD_LINK_SPEED_25000MBPS;
323 break;
324
424c3232
JX		 325 case SPEED_40000:
326 speed = AD_LINK_SPEED_40000MBPS;
327 break;
328
c7c55067
TC		 329 case SPEED_50000:
330 speed = AD_LINK_SPEED_50000MBPS;
331 break;
332
424c3232
JX		 333 case SPEED_56000:
334 speed = AD_LINK_SPEED_56000MBPS;
335 break;
336
3952af4d
JP		 337 case SPEED_100000:
338 speed = AD_LINK_SPEED_100000MBPS;
339 break;
340
1da177e4 341 default:
3bf2d28a 342 /* unknown speed value from ethtool. shouldn't happen */
cd99c377
ND		 343 if (slave->speed != SPEED_UNKNOWN)
344 pr_warn_once("%s: unknown ethtool speed (%d) for port %d (set it to 0)\n",
345 slave->bond->dev->name,
346 slave->speed,
347 port->actor_port_number);
3bf2d28a 348 speed = 0;
1da177e4
LT		 349 break;
350 }
351 }
352
d4471f5e
VF		 353 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
354 port->actor_port_number, speed);
1da177e4
LT		 355 return speed;
356}
357
358/**
359 * __get_duplex - get a port's duplex
360 * @port: the port we're looking at
361 *
362 * Return @port's duplex in 802.3ad bitmask format. i.e.:
363 * 0x01 if in full duplex
364 * 0x00 otherwise
365 */
366static u8 __get_duplex(struct port *port)
367{
368 struct slave *slave = port->slave;
b25c2e7d 369 u8 retval = 0x0;
1da177e4 370
3bf2d28a
VF		 371 /* handling a special case: when the configuration starts with
372 * link down, it sets the duplex to 0.
373 */
b25c2e7d 374 if (slave->link == BOND_LINK_UP) {
1da177e4
LT		 375 switch (slave->duplex) {
376 case DUPLEX_FULL:
128ea6c3 377 retval = 0x1;
d4471f5e
VF		 378 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
379 port->actor_port_number);
1da177e4
LT		 380 break;
381 case DUPLEX_HALF:
382 default:
128ea6c3 383 retval = 0x0;
d4471f5e
VF		 384 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
385 port->actor_port_number);
1da177e4
LT		 386 break;
387 }
388 }
389 return retval;
390}
391
5ee14e6d
NA		 392static void __ad_actor_update_port(struct port *port)
393{
394 const struct bonding *bond = bond_get_bond_by_slave(port->slave);
395
396 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
397 port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority;
398}
399
3bf2d28a 400/* Conversions */
1da177e4
LT		 401
402/**
403 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
404 * @timer_type: which timer to operate
405 * @par: timer parameter. see below
406 *
407 * If @timer_type is %current_while_timer, @par indicates long/short timer.
408 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
3bf2d28a 409 * %SLOW_PERIODIC_TIME.
1da177e4
LT		 410 */
411static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
412{
128ea6c3 413 u16 retval = 0; /* to silence the compiler */
1da177e4
LT		 414
415 switch (timer_type) {
3bf2d28a 416 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
7bfc4753 417 if (par)
3bf2d28a 418 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
7bfc4753 419 else
3bf2d28a 420 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
1da177e4 421 break;
3bf2d28a 422 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
1da177e4
LT		 423 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
424 break;
3bf2d28a
VF		 425 case AD_PERIODIC_TIMER: /* for periodic machine */
426 retval = (par*ad_ticks_per_sec); /* long timeout */
1da177e4 427 break;
3bf2d28a 428 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
1da177e4
LT		 429 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
430 break;
3bf2d28a 431 case AD_WAIT_WHILE_TIMER: /* for selection machine */
1da177e4
LT		 432 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
433 break;
434 }
3bf2d28a 435
1da177e4
LT		 436 return retval;
437}
438
439
3bf2d28a 440/* ================= ad_rx_machine helper functions ================== */
1da177e4 441
2d6682db
JV		 442/**
443 * __choose_matched - update a port's matched variable from a received lacpdu
444 * @lacpdu: the lacpdu we've received
445 * @port: the port we're looking at
446 *
447 * Update the value of the matched variable, using parameter values from a
448 * newly received lacpdu. Parameter values for the partner carried in the
449 * received PDU are compared with the corresponding operational parameter
450 * values for the actor. Matched is set to TRUE if all of these parameters
451 * match and the PDU parameter partner_state.aggregation has the same value as
452 * actor_oper_port_state.aggregation and lacp will actively maintain the link
453 * in the aggregation. Matched is also set to TRUE if the value of
454 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
455 * an individual link and lacp will actively maintain the link. Otherwise,
456 * matched is set to FALSE. LACP is considered to be actively maintaining the
457 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
458 * the actor's actor_oper_port_state.lacp_activity and the PDU's
459 * partner_state.lacp_activity variables are TRUE.
460 *
461 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
462 * used here to implement the language from 802.3ad 43.4.9 that requires
463 * recordPDU to "match" the LACPDU parameters to the stored values.
464 */
465static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
466{
815117ad 467 /* check if all parameters are alike
468 * or this is individual link(aggregation == FALSE)
469 * then update the state machine Matched variable.
470 */
2d6682db
JV		 471 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
472 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
815117ad 473 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
2d6682db
JV		 474 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
475 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
476 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
2d6682db
JV		 477 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
478 ) {
2d6682db
JV		 479 port->sm_vars |= AD_PORT_MATCHED;
480 } else {
481 port->sm_vars &= ~AD_PORT_MATCHED;
482 }
483}
484
1da177e4
LT		 485/**
486 * __record_pdu - record parameters from a received lacpdu
487 * @lacpdu: the lacpdu we've received
488 * @port: the port we're looking at
489 *
490 * Record the parameter values for the Actor carried in a received lacpdu as
491 * the current partner operational parameter values and sets
492 * actor_oper_port_state.defaulted to FALSE.
493 */
494static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
495{
1da177e4 496 if (lacpdu && port) {
b99d6ba9
HE		 497 struct port_params *partner = &port->partner_oper;
498
2d6682db 499 __choose_matched(lacpdu, port);
3bf2d28a
VF		 500 /* record the new parameter values for the partner
501 * operational
502 */
b99d6ba9
HE		 503 partner->port_number = ntohs(lacpdu->actor_port);
504 partner->port_priority = ntohs(lacpdu->actor_port_priority);
505 partner->system = lacpdu->actor_system;
506 partner->system_priority = ntohs(lacpdu->actor_system_priority);
507 partner->key = ntohs(lacpdu->actor_key);
508 partner->port_state = lacpdu->actor_state;
1da177e4 509
3bf2d28a 510 /* set actor_oper_port_state.defaulted to FALSE */
1da177e4
LT		 511 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
512
3bf2d28a
VF		 513 /* set the partner sync. to on if the partner is sync,
514 * and the port is matched
515 */
63b46242
WK		 516 if ((port->sm_vars & AD_PORT_MATCHED) &&
517 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
b99d6ba9 518 partner->port_state |= AD_STATE_SYNCHRONIZATION;
63b46242
WK		 519 pr_debug("%s partner sync=1\n", port->slave->dev->name);
520 } else {
b99d6ba9 521 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
63b46242
WK		 522 pr_debug("%s partner sync=0\n", port->slave->dev->name);
523 }
1da177e4
LT		 524 }
525}
526
527/**
528 * __record_default - record default parameters
529 * @port: the port we're looking at
530 *
531 * This function records the default parameter values for the partner carried
532 * in the Partner Admin parameters as the current partner operational parameter
533 * values and sets actor_oper_port_state.defaulted to TRUE.
534 */
535static void __record_default(struct port *port)
536{
1da177e4 537 if (port) {
3bf2d28a 538 /* record the partner admin parameters */
5eefd1ad
HE		 539 memcpy(&port->partner_oper, &port->partner_admin,
540 sizeof(struct port_params));
1da177e4 541
3bf2d28a 542 /* set actor_oper_port_state.defaulted to true */
1da177e4
LT		 543 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
544 }
545}
546
547/**
548 * __update_selected - update a port's Selected variable from a received lacpdu
549 * @lacpdu: the lacpdu we've received
550 * @port: the port we're looking at
551 *
552 * Update the value of the selected variable, using parameter values from a
553 * newly received lacpdu. The parameter values for the Actor carried in the
554 * received PDU are compared with the corresponding operational parameter
555 * values for the ports partner. If one or more of the comparisons shows that
556 * the value(s) received in the PDU differ from the current operational values,
557 * then selected is set to FALSE and actor_oper_port_state.synchronization is
558 * set to out_of_sync. Otherwise, selected remains unchanged.
559 */
560static void __update_selected(struct lacpdu *lacpdu, struct port *port)
561{
1da177e4 562 if (lacpdu && port) {
ce6a49ad
HE		 563 const struct port_params *partner = &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 (ntohs(lacpdu->actor_port) != partner->port_number ||
569 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
815117ad 570 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
8e95a202
JP		 571 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
572 ntohs(lacpdu->actor_key) != partner->key ||
573 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 574 port->sm_vars &= ~AD_PORT_SELECTED;
575 }
576 }
577}
578
579/**
580 * __update_default_selected - update a port's Selected variable from Partner
581 * @port: the port we're looking at
582 *
583 * This function updates the value of the selected variable, using the partner
584 * administrative parameter values. The administrative values are compared with
585 * the corresponding operational parameter values for the partner. If one or
586 * more of the comparisons shows that the administrative value(s) differ from
587 * the current operational values, then Selected is set to FALSE and
588 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
589 * Selected remains unchanged.
590 */
591static void __update_default_selected(struct port *port)
592{
1da177e4 593 if (port) {
3c52065f
HE		 594 const struct port_params *admin = &port->partner_admin;
595 const struct port_params *oper = &port->partner_oper;
596
815117ad 597 /* check if any parameter is different then
598 * update the state machine selected variable.
599 */
8e95a202
JP		 600 if (admin->port_number != oper->port_number ||
601 admin->port_priority != oper->port_priority ||
815117ad 602 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
8e95a202
JP		 603 admin->system_priority != oper->system_priority ||
604 admin->key != oper->key ||
605 (admin->port_state & AD_STATE_AGGREGATION)
3c52065f 606 != (oper->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 607 port->sm_vars &= ~AD_PORT_SELECTED;
608 }
609 }
610}
611
1da177e4
LT		 612/**
613 * __update_ntt - update a port's ntt variable from a received lacpdu
614 * @lacpdu: the lacpdu we've received
615 * @port: the port we're looking at
616 *
617 * Updates the value of the ntt variable, using parameter values from a newly
618 * received lacpdu. The parameter values for the partner carried in the
619 * received PDU are compared with the corresponding operational parameter
620 * values for the Actor. If one or more of the comparisons shows that the
621 * value(s) received in the PDU differ from the current operational values,
622 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
623 */
624static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
625{
815117ad 626 /* validate lacpdu and port */
1da177e4 627 if (lacpdu && port) {
815117ad 628 /* check if any parameter is different then
629 * update the port->ntt.
630 */
89cc76f9
JV		 631 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
632 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
815117ad 633 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 634 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
635 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 636 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
637 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
638 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
639 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
640 ) {
d238d458 641 port->ntt = true;
1da177e4
LT		 642 }
643 }
644}
645
1da177e4
LT		 646/**
647 * __agg_ports_are_ready - check if all ports in an aggregator are ready
648 * @aggregator: the aggregator we're looking at
649 *
650 */
651static int __agg_ports_are_ready(struct aggregator *aggregator)
652{
653 struct port *port;
654 int retval = 1;
655
656 if (aggregator) {
3bf2d28a
VF		 657 /* scan all ports in this aggregator to verfy if they are
658 * all ready.
659 */
128ea6c3
BD		 660 for (port = aggregator->lag_ports;
661 port;
662 port = port->next_port_in_aggregator) {
1da177e4
LT		 663 if (!(port->sm_vars & AD_PORT_READY_N)) {
664 retval = 0;
665 break;
666 }
667 }
668 }
669
670 return retval;
671}
672
673/**
674 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
675 * @aggregator: the aggregator we're looking at
676 * @val: Should the ports' ready bit be set on or off
677 *
678 */
679static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
680{
681 struct port *port;
682
128ea6c3
BD		 683 for (port = aggregator->lag_ports; port;
684 port = port->next_port_in_aggregator) {
7bfc4753 685 if (val)
1da177e4 686 port->sm_vars |= AD_PORT_READY;
7bfc4753 687 else
1da177e4 688 port->sm_vars &= ~AD_PORT_READY;
1da177e4
LT		 689 }
690}
691
0622cab0
JV		 692static int __agg_active_ports(struct aggregator *agg)
693{
694 struct port *port;
695 int active = 0;
696
697 for (port = agg->lag_ports; port;
698 port = port->next_port_in_aggregator) {
699 if (port->is_enabled)
700 active++;
701 }
702
703 return active;
704}
705
1da177e4
LT		 706/**
707 * __get_agg_bandwidth - get the total bandwidth of an aggregator
708 * @aggregator: the aggregator we're looking at
709 *
710 */
711static u32 __get_agg_bandwidth(struct aggregator *aggregator)
712{
0622cab0 713 int nports = __agg_active_ports(aggregator);
128ea6c3 714 u32 bandwidth = 0;
1da177e4 715
0622cab0 716 if (nports) {
65cce19c 717 switch (__get_link_speed(aggregator->lag_ports)) {
cb8dda90 718 case AD_LINK_SPEED_1MBPS:
0622cab0 719 bandwidth = nports;
1da177e4 720 break;
cb8dda90 721 case AD_LINK_SPEED_10MBPS:
0622cab0 722 bandwidth = nports * 10;
1da177e4 723 break;
cb8dda90 724 case AD_LINK_SPEED_100MBPS:
0622cab0 725 bandwidth = nports * 100;
1da177e4 726 break;
cb8dda90 727 case AD_LINK_SPEED_1000MBPS:
0622cab0 728 bandwidth = nports * 1000;
1da177e4 729 break;
424c3232 730 case AD_LINK_SPEED_2500MBPS:
0622cab0 731 bandwidth = nports * 2500;
424c3232 732 break;
c7c55067
TC		 733 case AD_LINK_SPEED_5000MBPS:
734 bandwidth = nports * 5000;
735 break;
cb8dda90 736 case AD_LINK_SPEED_10000MBPS:
0622cab0 737 bandwidth = nports * 10000;
94dbffd5 738 break;
3fcd64cf
ND		 739 case AD_LINK_SPEED_14000MBPS:
740 bandwidth = nports * 14000;
741 break;
424c3232 742 case AD_LINK_SPEED_20000MBPS:
0622cab0 743 bandwidth = nports * 20000;
424c3232 744 break;
19ddde1e
JW		 745 case AD_LINK_SPEED_25000MBPS:
746 bandwidth = nports * 25000;
747 break;
424c3232 748 case AD_LINK_SPEED_40000MBPS:
0622cab0 749 bandwidth = nports * 40000;
424c3232 750 break;
c7c55067
TC		 751 case AD_LINK_SPEED_50000MBPS:
752 bandwidth = nports * 50000;
753 break;
424c3232 754 case AD_LINK_SPEED_56000MBPS:
0622cab0 755 bandwidth = nports * 56000;
424c3232 756 break;
3952af4d 757 case AD_LINK_SPEED_100000MBPS:
0622cab0 758 bandwidth = nports * 100000;
3952af4d 759 break;
1da177e4 760 default:
3bf2d28a 761 bandwidth = 0; /* to silence the compiler */
1da177e4
LT		 762 }
763 }
764 return bandwidth;
765}
766
767/**
768 * __get_active_agg - get the current active aggregator
769 * @aggregator: the aggregator we're looking at
49b7624e
VF		 770 *
771 * Caller must hold RCU lock.
1da177e4
LT		 772 */
773static struct aggregator *__get_active_agg(struct aggregator *aggregator)
774{
19177e7d
VF		 775 struct bonding *bond = aggregator->slave->bond;
776 struct list_head *iter;
777 struct slave *slave;
1da177e4 778
be79bd04 779 bond_for_each_slave_rcu(bond, slave, iter)
3fdddd85 780 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
781 return &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4 782
19177e7d 783 return NULL;
1da177e4
LT		 784}
785
786/**
787 * __update_lacpdu_from_port - update a port's lacpdu fields
788 * @port: the port we're looking at
1da177e4
LT		 789 */
790static inline void __update_lacpdu_from_port(struct port *port)
791{
792 struct lacpdu *lacpdu = &port->lacpdu;
3b5b35d0 793 const struct port_params *partner = &port->partner_oper;
1da177e4 794
3bf2d28a
VF		 795 /* update current actual Actor parameters
796 * lacpdu->subtype initialized
1da177e4
LT		 797 * lacpdu->version_number initialized
798 * lacpdu->tlv_type_actor_info initialized
799 * lacpdu->actor_information_length initialized
800 */
801
d3bb52b0 802 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 803 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 804 lacpdu->actor_key = htons(port->actor_oper_port_key);
805 lacpdu->actor_port_priority = htons(port->actor_port_priority);
806 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4 807 lacpdu->actor_state = port->actor_oper_port_state;
63b46242
WK		 808 pr_debug("update lacpdu: %s, actor port state %x\n",
809 port->slave->dev->name, port->actor_oper_port_state);
1da177e4
LT		 810
811 /* lacpdu->reserved_3_1 initialized
812 * lacpdu->tlv_type_partner_info initialized
813 * lacpdu->partner_information_length initialized
814 */
815
3b5b35d0
HE		 816 lacpdu->partner_system_priority = htons(partner->system_priority);
817 lacpdu->partner_system = partner->system;
818 lacpdu->partner_key = htons(partner->key);
819 lacpdu->partner_port_priority = htons(partner->port_priority);
820 lacpdu->partner_port = htons(partner->port_number);
821 lacpdu->partner_state = partner->port_state;
1da177e4
LT		 822
823 /* lacpdu->reserved_3_2 initialized
824 * lacpdu->tlv_type_collector_info initialized
825 * lacpdu->collector_information_length initialized
826 * collector_max_delay initialized
827 * reserved_12[12] initialized
828 * tlv_type_terminator initialized
829 * terminator_length initialized
830 * reserved_50[50] initialized
831 */
1da177e4
LT		 832}
833
3bf2d28a 834/* ================= main 802.3ad protocol code ========================= */
1da177e4
LT		 835
836/**
837 * ad_lacpdu_send - send out a lacpdu packet on a given port
838 * @port: the port we're looking at
839 *
840 * Returns: 0 on success
841 * < 0 on error
842 */
843static int ad_lacpdu_send(struct port *port)
844{
845 struct slave *slave = port->slave;
846 struct sk_buff *skb;
847 struct lacpdu_header *lacpdu_header;
848 int length = sizeof(struct lacpdu_header);
1da177e4
LT		 849
850 skb = dev_alloc_skb(length);
7bfc4753 851 if (!skb)
1da177e4 852 return -ENOMEM;
1da177e4
LT		 853
854 skb->dev = slave->dev;
459a98ed 855 skb_reset_mac_header(skb);
b0e380b1 856 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 857 skb->protocol = PKT_TYPE_LACPDU;
858 skb->priority = TC_PRIO_CONTROL;
859
4df864c1 860 lacpdu_header = skb_put(skb, length);
1da177e4 861
ada0f863 862 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
b595076a 863 /* Note: source address is set to be the member's PERMANENT address,
3bf2d28a
VF		 864 * because we use it to identify loopback lacpdus in receive.
865 */
ada0f863 866 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
e727149e 867 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4 868
3bf2d28a 869 lacpdu_header->lacpdu = port->lacpdu;
1da177e4
LT		 870
871 dev_queue_xmit(skb);
872
873 return 0;
874}
875
876/**
877 * ad_marker_send - send marker information/response on a given port
878 * @port: the port we're looking at
879 * @marker: marker data to send
880 *
881 * Returns: 0 on success
882 * < 0 on error
883 */
1c3f0b8e 884static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 885{
886 struct slave *slave = port->slave;
887 struct sk_buff *skb;
1c3f0b8e
MD		 888 struct bond_marker_header *marker_header;
889 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 890
891 skb = dev_alloc_skb(length + 16);
7bfc4753 892 if (!skb)
1da177e4 893 return -ENOMEM;
1da177e4
LT		 894
895 skb_reserve(skb, 16);
896
897 skb->dev = slave->dev;
459a98ed 898 skb_reset_mac_header(skb);
b0e380b1 899 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 900 skb->protocol = PKT_TYPE_LACPDU;
901
4df864c1 902 marker_header = skb_put(skb, length);
1da177e4 903
ada0f863 904 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
b595076a 905 /* Note: source address is set to be the member's PERMANENT address,
3bf2d28a
VF		 906 * because we use it to identify loopback MARKERs in receive.
907 */
ada0f863 908 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
e727149e 909 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4 910
3bf2d28a 911 marker_header->marker = *marker;
1da177e4
LT		 912
913 dev_queue_xmit(skb);
914
915 return 0;
916}
917
918/**
919 * ad_mux_machine - handle a port's mux state machine
920 * @port: the port we're looking at
ee637714 921 * @update_slave_arr: Does slave array need update?
1da177e4 922 */
ee637714 923static void ad_mux_machine(struct port *port, bool *update_slave_arr)
1da177e4
LT		 924{
925 mux_states_t last_state;
926
3bf2d28a
VF		 927 /* keep current State Machine state to compare later if it was
928 * changed
929 */
1da177e4
LT		 930 last_state = port->sm_mux_state;
931
932 if (port->sm_vars & AD_PORT_BEGIN) {
3bf2d28a 933 port->sm_mux_state = AD_MUX_DETACHED;
1da177e4
LT		 934 } else {
935 switch (port->sm_mux_state) {
936 case AD_MUX_DETACHED:
7bfc4753
BD		 937 if ((port->sm_vars & AD_PORT_SELECTED)
938 || (port->sm_vars & AD_PORT_STANDBY))
939 /* if SELECTED or STANDBY */
3bf2d28a 940 port->sm_mux_state = AD_MUX_WAITING;
1da177e4
LT		 941 break;
942 case AD_MUX_WAITING:
3bf2d28a
VF		 943 /* if SELECTED == FALSE return to DETACH state */
944 if (!(port->sm_vars & AD_PORT_SELECTED)) {
1da177e4 945 port->sm_vars &= ~AD_PORT_READY_N;
3bf2d28a
VF		 946 /* in order to withhold the Selection Logic to
947 * check all ports READY_N value every callback
948 * cycle to update ready variable, we check
949 * READY_N and update READY here
950 */
1da177e4 951 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
3bf2d28a 952 port->sm_mux_state = AD_MUX_DETACHED;
1da177e4
LT		 953 break;
954 }
955
3bf2d28a 956 /* check if the wait_while_timer expired */
7bfc4753
BD		 957 if (port->sm_mux_timer_counter
958 && !(--port->sm_mux_timer_counter))
1da177e4 959 port->sm_vars |= AD_PORT_READY_N;
1da177e4 960
3bf2d28a
VF		 961 /* in order to withhold the selection logic to check
962 * all ports READY_N value every callback cycle to
963 * update ready variable, we check READY_N and update
964 * READY here
965 */
1da177e4
LT		 966 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
967
3bf2d28a
VF		 968 /* if the wait_while_timer expired, and the port is
969 * in READY state, move to ATTACHED state
970 */
7bfc4753
BD		 971 if ((port->sm_vars & AD_PORT_READY)
972 && !port->sm_mux_timer_counter)
3bf2d28a 973 port->sm_mux_state = AD_MUX_ATTACHED;
1da177e4
LT		 974 break;
975 case AD_MUX_ATTACHED:
3bf2d28a
VF		 976 /* check also if agg_select_timer expired (so the
977 * edable port will take place only after this timer)
978 */
979 if ((port->sm_vars & AD_PORT_SELECTED) &&
980 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
981 !__check_agg_selection_timer(port)) {
63b46242
WK		 982 if (port->aggregator->is_active)
983 port->sm_mux_state =
984 AD_MUX_COLLECTING_DISTRIBUTING;
3bf2d28a
VF		 985 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
986 (port->sm_vars & AD_PORT_STANDBY)) {
987 /* if UNSELECTED or STANDBY */
1da177e4 988 port->sm_vars &= ~AD_PORT_READY_N;
3bf2d28a
VF		 989 /* in order to withhold the selection logic to
990 * check all ports READY_N value every callback
991 * cycle to update ready variable, we check
992 * READY_N and update READY here
993 */
1da177e4 994 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
3bf2d28a 995 port->sm_mux_state = AD_MUX_DETACHED;
63b46242
WK		 996 } else if (port->aggregator->is_active) {
997 port->actor_oper_port_state |=
998 AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 999 }
1000 break;
1001 case AD_MUX_COLLECTING_DISTRIBUTING:
3bf2d28a
VF		 1002 if (!(port->sm_vars & AD_PORT_SELECTED) ||
1003 (port->sm_vars & AD_PORT_STANDBY) ||
63b46242
WK		 1004 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
1005 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
3bf2d28a 1006 port->sm_mux_state = AD_MUX_ATTACHED;
1da177e4 1007 } else {
3bf2d28a
VF		 1008 /* if port state hasn't changed make
1009 * sure that a collecting distributing
1010 * port in an active aggregator is enabled
1011 */
1da177e4
LT		 1012 if (port->aggregator &&
1013 port->aggregator->is_active &&
1014 !__port_is_enabled(port)) {
1015
1016 __enable_port(port);
1017 }
1018 }
1019 break;
3bf2d28a 1020 default:
1da177e4
LT		 1021 break;
1022 }
1023 }
1024
3bf2d28a 1025 /* check if the state machine was changed */
1da177e4 1026 if (port->sm_mux_state != last_state) {
63b46242
WK		 1027 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1028 port->actor_port_number,
1029 port->slave->dev->name,
1030 last_state,
a4aee5c8 1031 port->sm_mux_state);
1da177e4
LT		 1032 switch (port->sm_mux_state) {
1033 case AD_MUX_DETACHED:
1da177e4 1034 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
ee637714
MB		 1035 ad_disable_collecting_distributing(port,
1036 update_slave_arr);
1da177e4
LT		 1037 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1038 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
d238d458 1039 port->ntt = true;
1da177e4
LT		 1040 break;
1041 case AD_MUX_WAITING:
1042 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
1043 break;
1044 case AD_MUX_ATTACHED:
63b46242
WK		 1045 if (port->aggregator->is_active)
1046 port->actor_oper_port_state |=
1047 AD_STATE_SYNCHRONIZATION;
1048 else
1049 port->actor_oper_port_state &=
1050 ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 1051 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
1052 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
ee637714
MB		 1053 ad_disable_collecting_distributing(port,
1054 update_slave_arr);
d238d458 1055 port->ntt = true;
1da177e4
LT		 1056 break;
1057 case AD_MUX_COLLECTING_DISTRIBUTING:
1058 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1059 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
63b46242 1060 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
ee637714
MB		 1061 ad_enable_collecting_distributing(port,
1062 update_slave_arr);
d238d458 1063 port->ntt = true;
1da177e4 1064 break;
3bf2d28a 1065 default:
1da177e4
LT		 1066 break;
1067 }
1068 }
1069}
1070
1071/**
1072 * ad_rx_machine - handle a port's rx State Machine
1073 * @lacpdu: the lacpdu we've received
1074 * @port: the port we're looking at
1075 *
1076 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1077 * CURRENT. If timer expired set the state machine in the proper state.
1078 * In other cases, this function checks if we need to switch to other state.
1079 */
1080static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1081{
1082 rx_states_t last_state;
1083
3bf2d28a
VF		 1084 /* keep current State Machine state to compare later if it was
1085 * changed
1086 */
1da177e4
LT		 1087 last_state = port->sm_rx_state;
1088
3bf2d28a
VF		 1089 /* check if state machine should change state */
1090
1091 /* first, check if port was reinitialized */
14c9551a 1092 if (port->sm_vars & AD_PORT_BEGIN) {
7bfc4753 1093 port->sm_rx_state = AD_RX_INITIALIZE;
ef015d72 1094 port->sm_vars |= AD_PORT_CHURNED;
3bf2d28a 1095 /* check if port is not enabled */
ec891c8b 1096 } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled)
7bfc4753 1097 port->sm_rx_state = AD_RX_PORT_DISABLED;
3bf2d28a
VF		 1098 /* check if new lacpdu arrived */
1099 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1100 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1101 (port->sm_rx_state == AD_RX_CURRENT))) {
14c9551a 1102 if (port->sm_rx_state != AD_RX_CURRENT)
ef015d72 1103 port->sm_vars |= AD_PORT_CHURNED;
3bf2d28a 1104 port->sm_rx_timer_counter = 0;
1da177e4
LT		 1105 port->sm_rx_state = AD_RX_CURRENT;
1106 } else {
3bf2d28a
VF		 1107 /* if timer is on, and if it is expired */
1108 if (port->sm_rx_timer_counter &&
1109 !(--port->sm_rx_timer_counter)) {
1da177e4
LT		 1110 switch (port->sm_rx_state) {
1111 case AD_RX_EXPIRED:
3bf2d28a 1112 port->sm_rx_state = AD_RX_DEFAULTED;
1da177e4
LT		 1113 break;
1114 case AD_RX_CURRENT:
3bf2d28a 1115 port->sm_rx_state = AD_RX_EXPIRED;
1da177e4 1116 break;
3bf2d28a 1117 default:
1da177e4
LT		 1118 break;
1119 }
1120 } else {
3bf2d28a 1121 /* if no lacpdu arrived and no timer is on */
1da177e4
LT		 1122 switch (port->sm_rx_state) {
1123 case AD_RX_PORT_DISABLED:
ec891c8b
MB		 1124 if (port->is_enabled &&
1125 (port->sm_vars & AD_PORT_LACP_ENABLED))
3bf2d28a 1126 port->sm_rx_state = AD_RX_EXPIRED;
7bfc4753
BD		 1127 else if (port->is_enabled
1128 && ((port->sm_vars
1129 & AD_PORT_LACP_ENABLED) == 0))
3bf2d28a 1130 port->sm_rx_state = AD_RX_LACP_DISABLED;
1da177e4 1131 break;
3bf2d28a 1132 default:
1da177e4
LT		 1133 break;
1134
1135 }
1136 }
1137 }
1138
3bf2d28a 1139 /* check if the State machine was changed or new lacpdu arrived */
1da177e4 1140 if ((port->sm_rx_state != last_state) || (lacpdu)) {
63b46242
WK		 1141 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1142 port->actor_port_number,
1143 port->slave->dev->name,
1144 last_state,
a4aee5c8 1145 port->sm_rx_state);
1da177e4
LT		 1146 switch (port->sm_rx_state) {
1147 case AD_RX_INITIALIZE:
cb8dda90 1148 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1da177e4 1149 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
7bfc4753 1150 else
1da177e4 1151 port->sm_vars |= AD_PORT_LACP_ENABLED;
1da177e4
LT		 1152 port->sm_vars &= ~AD_PORT_SELECTED;
1153 __record_default(port);
1154 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
3bf2d28a 1155 port->sm_rx_state = AD_RX_PORT_DISABLED;
1da177e4 1156
3bf2d28a 1157 /* Fall Through */
1da177e4
LT		 1158 case AD_RX_PORT_DISABLED:
1159 port->sm_vars &= ~AD_PORT_MATCHED;
1160 break;
1161 case AD_RX_LACP_DISABLED:
1162 port->sm_vars &= ~AD_PORT_SELECTED;
1163 __record_default(port);
1055c9ab 1164 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1165 port->sm_vars |= AD_PORT_MATCHED;
1166 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1167 break;
1168 case AD_RX_EXPIRED:
3bf2d28a
VF		 1169 /* Reset of the Synchronization flag (Standard 43.4.12)
1170 * This reset cause to disable this port in the
1171 * COLLECTING_DISTRIBUTING state of the mux machine in
1172 * case of EXPIRED even if LINK_DOWN didn't arrive for
1173 * the port.
1174 */
1055c9ab 1175 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1176 port->sm_vars &= ~AD_PORT_MATCHED;
14c9551a 1177 port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT;
3bf2d28a 1178 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1da177e4
LT		 1179 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1180 port->actor_oper_port_state |= AD_STATE_EXPIRED;
ef015d72 1181 port->sm_vars |= AD_PORT_CHURNED;
1da177e4
LT		 1182 break;
1183 case AD_RX_DEFAULTED:
1184 __update_default_selected(port);
1185 __record_default(port);
1186 port->sm_vars |= AD_PORT_MATCHED;
1187 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1188 break;
1189 case AD_RX_CURRENT:
815117ad 1190 /* detect loopback situation */
3bf2d28a
VF		 1191 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1192 &(port->actor_system))) {
d4471f5e 1193 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
90194264 1194 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
3bf2d28a 1195 port->slave->dev->name);
1da177e4
LT		 1196 return;
1197 }
1198 __update_selected(lacpdu, port);
1199 __update_ntt(lacpdu, port);
1200 __record_pdu(lacpdu, port);
1da177e4
LT		 1201 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1202 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1da177e4 1203 break;
3bf2d28a 1204 default:
1da177e4
LT		 1205 break;
1206 }
1207 }
1da177e4
LT		 1208}
1209
14c9551a
MB		 1210/**
1211 * ad_churn_machine - handle port churn's state machine
1212 * @port: the port we're looking at
1213 *
1214 */
1215static void ad_churn_machine(struct port *port)
1216{
ef015d72
MB		 1217 if (port->sm_vars & AD_PORT_CHURNED) {
1218 port->sm_vars &= ~AD_PORT_CHURNED;
14c9551a
MB		 1219 port->sm_churn_actor_state = AD_CHURN_MONITOR;
1220 port->sm_churn_partner_state = AD_CHURN_MONITOR;
1221 port->sm_churn_actor_timer_counter =
1222 __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0);
1223 port->sm_churn_partner_timer_counter =
1224 __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0);
1225 return;
1226 }
1227 if (port->sm_churn_actor_timer_counter &&
1228 !(--port->sm_churn_actor_timer_counter) &&
1229 port->sm_churn_actor_state == AD_CHURN_MONITOR) {
1230 if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) {
1231 port->sm_churn_actor_state = AD_NO_CHURN;
1232 } else {
1233 port->churn_actor_count++;
1234 port->sm_churn_actor_state = AD_CHURN;
1235 }
1236 }
1237 if (port->sm_churn_partner_timer_counter &&
1238 !(--port->sm_churn_partner_timer_counter) &&
1239 port->sm_churn_partner_state == AD_CHURN_MONITOR) {
1240 if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) {
1241 port->sm_churn_partner_state = AD_NO_CHURN;
1242 } else {
1243 port->churn_partner_count++;
1244 port->sm_churn_partner_state = AD_CHURN;
1245 }
1246 }
1247}
1248
1da177e4
LT		 1249/**
1250 * ad_tx_machine - handle a port's tx state machine
1251 * @port: the port we're looking at
1da177e4
LT		 1252 */
1253static void ad_tx_machine(struct port *port)
1254{
3bf2d28a
VF		 1255 /* check if tx timer expired, to verify that we do not send more than
1256 * 3 packets per second
1257 */
1da177e4 1258 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
3bf2d28a 1259 /* check if there is something to send */
1da177e4
LT		 1260 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1261 __update_lacpdu_from_port(port);
d238d458 1262
1da177e4 1263 if (ad_lacpdu_send(port) >= 0) {
a4aee5c8
JP		 1264 pr_debug("Sent LACPDU on port %d\n",
1265 port->actor_port_number);
d238d458 1266
3bf2d28a
VF		 1267 /* mark ntt as false, so it will not be sent
1268 * again until demanded
1269 */
d238d458 1270 port->ntt = false;
1da177e4
LT		 1271 }
1272 }
3bf2d28a
VF		 1273 /* restart tx timer(to verify that we will not exceed
1274 * AD_MAX_TX_IN_SECOND
1275 */
1276 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 1277 }
1278}
1279
1280/**
1281 * ad_periodic_machine - handle a port's periodic state machine
1282 * @port: the port we're looking at
1283 *
1284 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1285 */
1286static void ad_periodic_machine(struct port *port)
1287{
1288 periodic_states_t last_state;
1289
3bf2d28a 1290 /* keep current state machine state to compare later if it was changed */
1da177e4
LT		 1291 last_state = port->sm_periodic_state;
1292
3bf2d28a 1293 /* check if port was reinitialized */
1da177e4 1294 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1295 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4 1296 ) {
3bf2d28a 1297 port->sm_periodic_state = AD_NO_PERIODIC;
1da177e4 1298 }
3bf2d28a 1299 /* check if state machine should change state */
1da177e4 1300 else if (port->sm_periodic_timer_counter) {
3bf2d28a 1301 /* check if periodic state machine expired */
1da177e4 1302 if (!(--port->sm_periodic_timer_counter)) {
3bf2d28a
VF		 1303 /* if expired then do tx */
1304 port->sm_periodic_state = AD_PERIODIC_TX;
1da177e4 1305 } else {
3bf2d28a
VF		 1306 /* If not expired, check if there is some new timeout
1307 * parameter from the partner state
1308 */
1da177e4
LT		 1309 switch (port->sm_periodic_state) {
1310 case AD_FAST_PERIODIC:
7bfc4753
BD		 1311 if (!(port->partner_oper.port_state
1312 & AD_STATE_LACP_TIMEOUT))
3bf2d28a 1313 port->sm_periodic_state = AD_SLOW_PERIODIC;
1da177e4
LT		 1314 break;
1315 case AD_SLOW_PERIODIC:
1055c9ab 1316 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4 1317 port->sm_periodic_timer_counter = 0;
3bf2d28a 1318 port->sm_periodic_state = AD_PERIODIC_TX;
1da177e4
LT		 1319 }
1320 break;
3bf2d28a 1321 default:
1da177e4
LT		 1322 break;
1323 }
1324 }
1325 } else {
1326 switch (port->sm_periodic_state) {
1327 case AD_NO_PERIODIC:
3bf2d28a 1328 port->sm_periodic_state = AD_FAST_PERIODIC;
1da177e4
LT		 1329 break;
1330 case AD_PERIODIC_TX:
3bf2d28a
VF		 1331 if (!(port->partner_oper.port_state &
1332 AD_STATE_LACP_TIMEOUT))
1333 port->sm_periodic_state = AD_SLOW_PERIODIC;
7bfc4753 1334 else
3bf2d28a 1335 port->sm_periodic_state = AD_FAST_PERIODIC;
1da177e4 1336 break;
3bf2d28a 1337 default:
1da177e4
LT		 1338 break;
1339 }
1340 }
1341
3bf2d28a 1342 /* check if the state machine was changed */
1da177e4 1343 if (port->sm_periodic_state != last_state) {
a4aee5c8
JP		 1344 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1345 port->actor_port_number, last_state,
1346 port->sm_periodic_state);
1da177e4
LT		 1347 switch (port->sm_periodic_state) {
1348 case AD_NO_PERIODIC:
3bf2d28a 1349 port->sm_periodic_timer_counter = 0;
1da177e4
LT		 1350 break;
1351 case AD_FAST_PERIODIC:
3bf2d28a
VF		 1352 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1353 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1da177e4
LT		 1354 break;
1355 case AD_SLOW_PERIODIC:
3bf2d28a
VF		 1356 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1357 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1da177e4
LT		 1358 break;
1359 case AD_PERIODIC_TX:
d238d458 1360 port->ntt = true;
1da177e4 1361 break;
3bf2d28a 1362 default:
1da177e4
LT		 1363 break;
1364 }
1365 }
1366}
1367
1368/**
1369 * ad_port_selection_logic - select aggregation groups
1370 * @port: the port we're looking at
ee637714 1371 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1372 *
1373 * Select aggregation groups, and assign each port for it's aggregetor. The
1374 * selection logic is called in the inititalization (after all the handshkes),
1375 * and after every lacpdu receive (if selected is off).
1376 */
ee637714 1377static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1da177e4
LT		 1378{
1379 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1380 struct port *last_port = NULL, *curr_port;
3e36bb75
VF		 1381 struct list_head *iter;
1382 struct bonding *bond;
1383 struct slave *slave;
1da177e4
LT		 1384 int found = 0;
1385
3bf2d28a 1386 /* if the port is already Selected, do nothing */
7bfc4753 1387 if (port->sm_vars & AD_PORT_SELECTED)
1da177e4 1388 return;
1da177e4 1389
3e36bb75
VF		 1390 bond = __get_bond_by_port(port);
1391
3bf2d28a 1392 /* if the port is connected to other aggregator, detach it */
1da177e4 1393 if (port->aggregator) {
3bf2d28a 1394 /* detach the port from its former aggregator */
128ea6c3
BD		 1395 temp_aggregator = port->aggregator;
1396 for (curr_port = temp_aggregator->lag_ports; curr_port;
1397 last_port = curr_port,
3bf2d28a 1398 curr_port = curr_port->next_port_in_aggregator) {
1da177e4
LT		 1399 if (curr_port == port) {
1400 temp_aggregator->num_of_ports--;
3bf2d28a
VF		 1401 /* if it is the first port attached to the
1402 * aggregator
1403 */
1404 if (!last_port) {
128ea6c3
BD		 1405 temp_aggregator->lag_ports =
1406 port->next_port_in_aggregator;
3bf2d28a
VF		 1407 } else {
1408 /* not the first port attached to the
1409 * aggregator
1410 */
128ea6c3
BD		 1411 last_port->next_port_in_aggregator =
1412 port->next_port_in_aggregator;
1da177e4
LT		 1413 }
1414
3bf2d28a
VF		 1415 /* clear the port's relations to this
1416 * aggregator
1417 */
1da177e4 1418 port->aggregator = NULL;
128ea6c3
BD		 1419 port->next_port_in_aggregator = NULL;
1420 port->actor_port_aggregator_identifier = 0;
1da177e4 1421
d4471f5e
VF		 1422 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1423 port->actor_port_number,
1424 temp_aggregator->aggregator_identifier);
3bf2d28a
VF		 1425 /* if the aggregator is empty, clear its
1426 * parameters, and set it ready to be attached
1427 */
7bfc4753 1428 if (!temp_aggregator->lag_ports)
1da177e4 1429 ad_clear_agg(temp_aggregator);
1da177e4
LT		 1430 break;
1431 }
1432 }
3bf2d28a
VF		 1433 if (!curr_port) {
1434 /* meaning: the port was related to an aggregator
1435 * but was not on the aggregator port list
1436 */
d4471f5e
VF		 1437 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1438 port->slave->bond->dev->name,
1439 port->actor_port_number,
1440 port->slave->dev->name,
1441 port->aggregator->aggregator_identifier);
1da177e4
LT		 1442 }
1443 }
3bf2d28a 1444 /* search on all aggregators for a suitable aggregator for this port */
3e36bb75 1445 bond_for_each_slave(bond, slave, iter) {
3fdddd85 1446 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4 1447
3bf2d28a 1448 /* keep a free aggregator for later use(if needed) */
1da177e4 1449 if (!aggregator->lag_ports) {
7bfc4753 1450 if (!free_aggregator)
128ea6c3 1451 free_aggregator = aggregator;
1da177e4
LT		 1452 continue;
1453 }
815117ad 1454 /* check if current aggregator suits us */
1455 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1456 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1055c9ab
HE		 1457 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1458 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1459 ) &&
815117ad 1460 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1461 !aggregator->is_individual) /* but is not individual OR */
1da177e4
LT		 1462 )
1463 ) {
815117ad 1464 /* attach to the founded aggregator */
1da177e4 1465 port->aggregator = aggregator;
128ea6c3
BD		 1466 port->actor_port_aggregator_identifier =
1467 port->aggregator->aggregator_identifier;
1468 port->next_port_in_aggregator = aggregator->lag_ports;
1da177e4 1469 port->aggregator->num_of_ports++;
128ea6c3 1470 aggregator->lag_ports = port;
d4471f5e
VF		 1471 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1472 port->actor_port_number,
1473 port->aggregator->aggregator_identifier);
1da177e4 1474
3bf2d28a 1475 /* mark this port as selected */
1da177e4
LT		 1476 port->sm_vars |= AD_PORT_SELECTED;
1477 found = 1;
1478 break;
1479 }
1480 }
1481
3bf2d28a
VF		 1482 /* the port couldn't find an aggregator - attach it to a new
1483 * aggregator
1484 */
1da177e4
LT		 1485 if (!found) {
1486 if (free_aggregator) {
3bf2d28a 1487 /* assign port a new aggregator */
1da177e4 1488 port->aggregator = free_aggregator;
128ea6c3
BD		 1489 port->actor_port_aggregator_identifier =
1490 port->aggregator->aggregator_identifier;
1da177e4 1491
3bf2d28a
VF		 1492 /* update the new aggregator's parameters
1493 * if port was responsed from the end-user
1494 */
cb8dda90 1495 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
7bfc4753 1496 /* if port is full duplex */
1624db7b 1497 port->aggregator->is_individual = false;
7bfc4753 1498 else
1624db7b 1499 port->aggregator->is_individual = true;
1da177e4 1500
c3cd9ee1
MB		 1501 port->aggregator->actor_admin_aggregator_key =
1502 port->actor_admin_port_key;
1503 port->aggregator->actor_oper_aggregator_key =
1504 port->actor_oper_port_key;
128ea6c3
BD		 1505 port->aggregator->partner_system =
1506 port->partner_oper.system;
1507 port->aggregator->partner_system_priority =
1508 port->partner_oper.system_priority;
1055c9ab 1509 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1510 port->aggregator->receive_state = 1;
1511 port->aggregator->transmit_state = 1;
1512 port->aggregator->lag_ports = port;
1513 port->aggregator->num_of_ports++;
1514
3bf2d28a 1515 /* mark this port as selected */
1da177e4
LT		 1516 port->sm_vars |= AD_PORT_SELECTED;
1517
d4471f5e
VF		 1518 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1519 port->actor_port_number,
1520 port->aggregator->aggregator_identifier);
1da177e4 1521 } else {
d4471f5e 1522 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1da177e4
LT		 1523 port->actor_port_number, port->slave->dev->name);
1524 }
1525 }
3bf2d28a
VF		 1526 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1527 * in all aggregator's ports, else set ready=FALSE in all
1528 * aggregator's ports
1529 */
1530 __set_agg_ports_ready(port->aggregator,
1531 __agg_ports_are_ready(port->aggregator));
1da177e4 1532
fd989c83 1533 aggregator = __get_first_agg(port);
ee637714 1534 ad_agg_selection_logic(aggregator, update_slave_arr);
63b46242
WK		 1535
1536 if (!port->aggregator->is_active)
1537 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
fd989c83
JV		 1538}
1539
3bf2d28a 1540/* Decide if "agg" is a better choice for the new active aggregator that
fd989c83
JV		 1541 * the current best, according to the ad_select policy.
1542 */
1543static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1544 struct aggregator *curr)
1545{
3bf2d28a 1546 /* 0. If no best, select current.
fd989c83
JV		 1547 *
1548 * 1. If the current agg is not individual, and the best is
1549 * individual, select current.
1550 *
1551 * 2. If current agg is individual and the best is not, keep best.
1552 *
1553 * 3. Therefore, current and best are both individual or both not
1554 * individual, so:
1555 *
1556 * 3a. If current agg partner replied, and best agg partner did not,
1557 * select current.
1558 *
1559 * 3b. If current agg partner did not reply and best agg partner
1560 * did reply, keep best.
1561 *
1562 * 4. Therefore, current and best both have partner replies or
1563 * both do not, so perform selection policy:
1564 *
1565 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1566 * select by bandwidth.
1567 *
1568 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1569 */
1570 if (!best)
1571 return curr;
1572
1573 if (!curr->is_individual && best->is_individual)
1574 return curr;
1575
1576 if (curr->is_individual && !best->is_individual)
1577 return best;
1578
1579 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1580 return curr;
1581
1582 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1583 return best;
1584
1585 switch (__get_agg_selection_mode(curr->lag_ports)) {
1586 case BOND_AD_COUNT:
0622cab0 1587 if (__agg_active_ports(curr) > __agg_active_ports(best))
fd989c83
JV		 1588 return curr;
1589
0622cab0 1590 if (__agg_active_ports(curr) < __agg_active_ports(best))
fd989c83
JV		 1591 return best;
1592
1593 /*FALLTHROUGH*/
1594 case BOND_AD_STABLE:
1595 case BOND_AD_BANDWIDTH:
1596 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1597 return curr;
1598
1599 break;
1600
1601 default:
d4471f5e
VF		 1602 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1603 curr->slave->bond->dev->name,
1604 __get_agg_selection_mode(curr->lag_ports));
fd989c83 1605 break;
1da177e4 1606 }
fd989c83
JV		 1607
1608 return best;
1da177e4
LT		 1609}
1610
4cd6fe1c
SH		 1611static int agg_device_up(const struct aggregator *agg)
1612{
2430af8b 1613 struct port *port = agg->lag_ports;
3bf2d28a 1614
2430af8b
JB		 1615 if (!port)
1616 return 0;
3bf2d28a 1617
0622cab0
JV		 1618 for (port = agg->lag_ports; port;
1619 port = port->next_port_in_aggregator) {
1620 if (netif_running(port->slave->dev) &&
1621 netif_carrier_ok(port->slave->dev))
1622 return 1;
1623 }
1624
1625 return 0;
4cd6fe1c
SH		 1626}
1627
1da177e4
LT		 1628/**
1629 * ad_agg_selection_logic - select an aggregation group for a team
1630 * @aggregator: the aggregator we're looking at
ee637714 1631 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1632 *
1633 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1634 *
1635 * The logic of this function is to select the aggregator according to
1636 * the ad_select policy:
1637 *
1638 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1639 * it, and to reselect the active aggregator only if the previous
1640 * aggregator has no more ports related to it.
1641 *
1642 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1643 * bandwidth, and reselect whenever a link state change takes place or the
1644 * set of slaves in the bond changes.
1645 *
1646 * BOND_AD_COUNT: select the aggregator with largest number of ports
1647 * (slaves), and reselect whenever a link state change takes place or the
1648 * set of slaves in the bond changes.
1da177e4
LT		 1649 *
1650 * FIXME: this function MUST be called with the first agg in the bond, or
1651 * __get_active_agg() won't work correctly. This function should be better
1652 * called with the bond itself, and retrieve the first agg from it.
1653 */
ee637714
MB		 1654static void ad_agg_selection_logic(struct aggregator *agg,
1655 bool *update_slave_arr)
1da177e4 1656{
fd989c83 1657 struct aggregator *best, *active, *origin;
bef1fcce
VF		 1658 struct bonding *bond = agg->slave->bond;
1659 struct list_head *iter;
1660 struct slave *slave;
1da177e4 1661 struct port *port;
1da177e4 1662
49b7624e 1663 rcu_read_lock();
fd989c83 1664 origin = agg;
fd989c83 1665 active = __get_active_agg(agg);
4cd6fe1c 1666 best = (active && agg_device_up(active)) ? active : NULL;
1da177e4 1667
be79bd04 1668 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 1669 agg = &(SLAVE_AD_INFO(slave)->aggregator);
bef1fcce 1670
fd989c83
JV		 1671 agg->is_active = 0;
1672
0622cab0 1673 if (__agg_active_ports(agg) && agg_device_up(agg))
fd989c83 1674 best = ad_agg_selection_test(best, agg);
bef1fcce 1675 }
fd989c83
JV		 1676
1677 if (best &&
1678 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
3bf2d28a 1679 /* For the STABLE policy, don't replace the old active
fd989c83
JV		 1680 * aggregator if it's still active (it has an answering
1681 * partner) or if both the best and active don't have an
1682 * answering partner.
1683 */
1684 if (active && active->lag_ports &&
0622cab0 1685 __agg_active_ports(active) &&
fd989c83 1686 (__agg_has_partner(active) ||
3bf2d28a
VF		 1687 (!__agg_has_partner(active) &&
1688 !__agg_has_partner(best)))) {
fd989c83
JV		 1689 if (!(!active->actor_oper_aggregator_key &&
1690 best->actor_oper_aggregator_key)) {
1691 best = NULL;
1692 active->is_active = 1;
1da177e4
LT		 1693 }
1694 }
fd989c83 1695 }
1da177e4 1696
fd989c83
JV		 1697 if (best && (best == active)) {
1698 best = NULL;
1699 active->is_active = 1;
1da177e4
LT		 1700 }
1701
be79bd04 1702 /* if there is new best aggregator, activate it */
fd989c83 1703 if (best) {
d4471f5e
VF		 1704 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1705 best->aggregator_identifier, best->num_of_ports,
1706 best->actor_oper_aggregator_key,
1707 best->partner_oper_aggregator_key,
1708 best->is_individual, best->is_active);
1709 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1710 best->lag_ports, best->slave,
1711 best->slave ? best->slave->dev->name : "NULL");
fd989c83 1712
be79bd04 1713 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 1714 agg = &(SLAVE_AD_INFO(slave)->aggregator);
fd989c83 1715
d4471f5e
VF		 1716 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1717 agg->aggregator_identifier, agg->num_of_ports,
1718 agg->actor_oper_aggregator_key,
1719 agg->partner_oper_aggregator_key,
1720 agg->is_individual, agg->is_active);
1da177e4
LT		 1721 }
1722
be79bd04 1723 /* check if any partner replys */
fd989c83 1724 if (best->is_individual) {
d4471f5e
VF		 1725 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1726 best->slave ?
1727 best->slave->bond->dev->name : "NULL");
1da177e4
LT		 1728 }
1729
fd989c83 1730 best->is_active = 1;
d4471f5e
VF		 1731 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1732 best->aggregator_identifier);
1733 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1734 best->aggregator_identifier, best->num_of_ports,
1735 best->actor_oper_aggregator_key,
1736 best->partner_oper_aggregator_key,
1737 best->is_individual, best->is_active);
1da177e4 1738
3bf2d28a
VF		 1739 /* disable the ports that were related to the former
1740 * active_aggregator
1741 */
fd989c83
JV		 1742 if (active) {
1743 for (port = active->lag_ports; port;
1744 port = port->next_port_in_aggregator) {
1da177e4
LT		 1745 __disable_port(port);
1746 }
1747 }
ee637714
MB		 1748 /* Slave array needs update. */
1749 *update_slave_arr = true;
1da177e4
LT		 1750 }
1751
3bf2d28a 1752 /* if the selected aggregator is of join individuals
fd989c83
JV		 1753 * (partner_system is NULL), enable their ports
1754 */
1755 active = __get_active_agg(origin);
1da177e4 1756
fd989c83
JV		 1757 if (active) {
1758 if (!__agg_has_partner(active)) {
1759 for (port = active->lag_ports; port;
1760 port = port->next_port_in_aggregator) {
1da177e4
LT		 1761 __enable_port(port);
1762 }
1763 }
1764 }
fd989c83 1765
be79bd04 1766 rcu_read_unlock();
1767
bef1fcce 1768 bond_3ad_set_carrier(bond);
1da177e4
LT		 1769}
1770
1771/**
1772 * ad_clear_agg - clear a given aggregator's parameters
1773 * @aggregator: the aggregator we're looking at
1da177e4
LT		 1774 */
1775static void ad_clear_agg(struct aggregator *aggregator)
1776{
1777 if (aggregator) {
1624db7b 1778 aggregator->is_individual = false;
1da177e4
LT		 1779 aggregator->actor_admin_aggregator_key = 0;
1780 aggregator->actor_oper_aggregator_key = 0;
f87fda00 1781 eth_zero_addr(aggregator->partner_system.mac_addr_value);
1da177e4
LT		 1782 aggregator->partner_system_priority = 0;
1783 aggregator->partner_oper_aggregator_key = 0;
1784 aggregator->receive_state = 0;
1785 aggregator->transmit_state = 0;
1786 aggregator->lag_ports = NULL;
1787 aggregator->is_active = 0;
1788 aggregator->num_of_ports = 0;
a4aee5c8
JP		 1789 pr_debug("LAG %d was cleared\n",
1790 aggregator->aggregator_identifier);
1da177e4
LT		 1791 }
1792}
1793
1794/**
1795 * ad_initialize_agg - initialize a given aggregator's parameters
1796 * @aggregator: the aggregator we're looking at
1da177e4
LT		 1797 */
1798static void ad_initialize_agg(struct aggregator *aggregator)
1799{
1800 if (aggregator) {
1801 ad_clear_agg(aggregator);
1802
f87fda00 1803 eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value);
1da177e4
LT		 1804 aggregator->aggregator_identifier = 0;
1805 aggregator->slave = NULL;
1806 }
1807}
1808
1809/**
1810 * ad_initialize_port - initialize a given port's parameters
1811 * @aggregator: the aggregator we're looking at
1812 * @lacp_fast: boolean. whether fast periodic should be used
1da177e4
LT		 1813 */
1814static void ad_initialize_port(struct port *port, int lacp_fast)
1815{
c7e703d0
HE		 1816 static const struct port_params tmpl = {
1817 .system_priority = 0xffff,
1818 .key = 1,
1819 .port_number = 1,
1820 .port_priority = 0xff,
1821 .port_state = 1,
1822 };
7addeef6
HE		 1823 static const struct lacpdu lacpdu = {
1824 .subtype = 0x01,
1825 .version_number = 0x01,
1826 .tlv_type_actor_info = 0x01,
1827 .actor_information_length = 0x14,
1828 .tlv_type_partner_info = 0x02,
1829 .partner_information_length = 0x14,
1830 .tlv_type_collector_info = 0x03,
1831 .collector_information_length = 0x10,
1832 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1833 };
c7e703d0 1834
1da177e4 1835 if (port) {
1da177e4 1836 port->actor_port_priority = 0xff;
1da177e4 1837 port->actor_port_aggregator_identifier = 0;
d238d458 1838 port->ntt = false;
3bf2d28a
VF		 1839 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1840 AD_STATE_LACP_ACTIVITY;
1841 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1842 AD_STATE_LACP_ACTIVITY;
1da177e4 1843
7bfc4753 1844 if (lacp_fast)
1da177e4 1845 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1da177e4 1846
c7e703d0
HE		 1847 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1848 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1849
f48127b6 1850 port->is_enabled = true;
3bf2d28a 1851 /* private parameters */
19a12049 1852 port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED;
1da177e4
LT		 1853 port->sm_rx_state = 0;
1854 port->sm_rx_timer_counter = 0;
1855 port->sm_periodic_state = 0;
1856 port->sm_periodic_timer_counter = 0;
1857 port->sm_mux_state = 0;
1858 port->sm_mux_timer_counter = 0;
1859 port->sm_tx_state = 0;
1da177e4
LT		 1860 port->aggregator = NULL;
1861 port->next_port_in_aggregator = NULL;
1862 port->transaction_id = 0;
1863
14c9551a
MB		 1864 port->sm_churn_actor_timer_counter = 0;
1865 port->sm_churn_actor_state = 0;
1866 port->churn_actor_count = 0;
1867 port->sm_churn_partner_timer_counter = 0;
1868 port->sm_churn_partner_state = 0;
1869 port->churn_partner_count = 0;
1870
7addeef6 1871 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1da177e4
LT		 1872 }
1873}
1874
1875/**
1876 * ad_enable_collecting_distributing - enable a port's transmit/receive
1877 * @port: the port we're looking at
ee637714 1878 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1879 *
1880 * Enable @port if it's in an active aggregator
1881 */
ee637714
MB		 1882static void ad_enable_collecting_distributing(struct port *port,
1883 bool *update_slave_arr)
1da177e4
LT		 1884{
1885 if (port->aggregator->is_active) {
a4aee5c8
JP		 1886 pr_debug("Enabling port %d(LAG %d)\n",
1887 port->actor_port_number,
1888 port->aggregator->aggregator_identifier);
1da177e4 1889 __enable_port(port);
ee637714
MB		 1890 /* Slave array needs update */
1891 *update_slave_arr = true;
1da177e4
LT		 1892 }
1893}
1894
1895/**
1896 * ad_disable_collecting_distributing - disable a port's transmit/receive
1897 * @port: the port we're looking at
ee637714 1898 * @update_slave_arr: Does slave array need update?
1da177e4 1899 */
ee637714
MB		 1900static void ad_disable_collecting_distributing(struct port *port,
1901 bool *update_slave_arr)
1da177e4 1902{
3bf2d28a
VF		 1903 if (port->aggregator &&
1904 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1905 &(null_mac_addr))) {
a4aee5c8
JP		 1906 pr_debug("Disabling port %d(LAG %d)\n",
1907 port->actor_port_number,
1908 port->aggregator->aggregator_identifier);
1da177e4 1909 __disable_port(port);
ee637714
MB		 1910 /* Slave array needs an update */
1911 *update_slave_arr = true;
1da177e4
LT		 1912 }
1913}
1914
1da177e4
LT		 1915/**
1916 * ad_marker_info_received - handle receive of a Marker information frame
1917 * @marker_info: Marker info received
1918 * @port: the port we're looking at
1da177e4 1919 */
1c3f0b8e
MD		 1920static void ad_marker_info_received(struct bond_marker *marker_info,
1921 struct port *port)
1da177e4 1922{
1c3f0b8e 1923 struct bond_marker marker;
1da177e4 1924
3bf2d28a 1925 /* copy the received marker data to the response marker */
1c3f0b8e 1926 memcpy(&marker, marker_info, sizeof(struct bond_marker));
3bf2d28a 1927 /* change the marker subtype to marker response */
128ea6c3 1928 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1da177e4 1929
3bf2d28a 1930 /* send the marker response */
1da177e4 1931 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1932 pr_debug("Sent Marker Response on port %d\n",
1933 port->actor_port_number);
1da177e4
LT		 1934 }
1935}
1936
1937/**
1938 * ad_marker_response_received - handle receive of a marker response frame
1939 * @marker: marker PDU received
1940 * @port: the port we're looking at
1941 *
1942 * This function does nothing since we decided not to implement send and handle
1943 * response for marker PDU's, in this stage, but only to respond to marker
1944 * information.
1945 */
1c3f0b8e 1946static void ad_marker_response_received(struct bond_marker *marker,
3bf2d28a 1947 struct port *port)
1da177e4 1948{
3bf2d28a 1949 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1da177e4
LT		 1950}
1951
3bf2d28a 1952/* ========= AD exported functions to the main bonding code ========= */
1da177e4 1953
3bf2d28a 1954/* Check aggregators status in team every T seconds */
1da177e4
LT		 1955#define AD_AGGREGATOR_SELECTION_TIMER 8
1956
3bf2d28a
VF		 1957/**
1958 * bond_3ad_initiate_agg_selection - initate aggregator selection
1959 * @bond: bonding struct
fd989c83
JV		 1960 *
1961 * Set the aggregation selection timer, to initiate an agg selection in
1962 * the very near future. Called during first initialization, and during
1963 * any down to up transitions of the bond.
1964 */
1965void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1966{
1967 BOND_AD_INFO(bond).agg_select_timer = timeout;
fd989c83
JV		 1968}
1969
1da177e4
LT		 1970/**
1971 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1972 * @bond: bonding struct to work on
1973 * @tick_resolution: tick duration (millisecond resolution)
1da177e4
LT		 1974 *
1975 * Can be called only after the mac address of the bond is set.
1976 */
56d00c67 1977void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
3a6d54c5 1978{
815117ad 1979 /* check that the bond is not initialized yet */
1980 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
3a6d54c5 1981 bond->dev->dev_addr)) {
1da177e4 1982
163c8ff3 1983 BOND_AD_INFO(bond).aggregator_identifier = 0;
1da177e4 1984
6791e466
MB		 1985 BOND_AD_INFO(bond).system.sys_priority =
1986 bond->params.ad_actor_sys_prio;
74514957
MB		 1987 if (is_zero_ether_addr(bond->params.ad_actor_system))
1988 BOND_AD_INFO(bond).system.sys_mac_addr =
1989 *((struct mac_addr *)bond->dev->dev_addr);
1990 else
1991 BOND_AD_INFO(bond).system.sys_mac_addr =
1992 *((struct mac_addr *)bond->params.ad_actor_system);
1da177e4 1993
3bf2d28a
VF		 1994 /* initialize how many times this module is called in one
1995 * second (should be about every 100ms)
1996 */
1da177e4
LT		 1997 ad_ticks_per_sec = tick_resolution;
1998
fd989c83
JV		 1999 bond_3ad_initiate_agg_selection(bond,
2000 AD_AGGREGATOR_SELECTION_TIMER *
2001 ad_ticks_per_sec);
1da177e4
LT		 2002 }
2003}
2004
2005/**
2006 * bond_3ad_bind_slave - initialize a slave's port
2007 * @slave: slave struct to work on
2008 *
2009 * Returns: 0 on success
2010 * < 0 on error
2011 */
359632e5 2012void bond_3ad_bind_slave(struct slave *slave)
1da177e4
LT		 2013{
2014 struct bonding *bond = bond_get_bond_by_slave(slave);
2015 struct port *port;
2016 struct aggregator *aggregator;
2017
359632e5 2018 /* check that the slave has not been initialized yet. */
3fdddd85 2019 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1da177e4 2020
359632e5 2021 /* port initialization */
3fdddd85 2022 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2023
bf0239a9 2024 ad_initialize_port(port, bond->params.lacp_fast);
1da177e4
LT		 2025
2026 port->slave = slave;
3fdddd85 2027 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
d22a5fc0
MB		 2028 /* key is determined according to the link speed, duplex and
2029 * user key
359632e5 2030 */
d22a5fc0 2031 port->actor_admin_port_key = bond->params.ad_user_port_key << 6;
7bb11dc9 2032 ad_update_actor_keys(port, false);
359632e5 2033 /* actor system is the bond's system */
5ee14e6d 2034 __ad_actor_update_port(port);
3bf2d28a
VF		 2035 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
2036 * lacpdu's are sent in one second)
2037 */
1da177e4 2038 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 2039
2040 __disable_port(port);
1da177e4 2041
359632e5 2042 /* aggregator initialization */
3fdddd85 2043 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4
LT		 2044
2045 ad_initialize_agg(aggregator);
2046
2047 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
163c8ff3 2048 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1da177e4
LT		 2049 aggregator->slave = slave;
2050 aggregator->is_active = 0;
2051 aggregator->num_of_ports = 0;
2052 }
1da177e4
LT		 2053}
2054
2055/**
2056 * bond_3ad_unbind_slave - deinitialize a slave's port
2057 * @slave: slave struct to work on
2058 *
2059 * Search for the aggregator that is related to this port, remove the
2060 * aggregator and assign another aggregator for other port related to it
2061 * (if any), and remove the port.
2062 */
2063void bond_3ad_unbind_slave(struct slave *slave)
2064{
2065 struct port *port, *prev_port, *temp_port;
2066 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
2067 int select_new_active_agg = 0;
0b088264
VF		 2068 struct bonding *bond = slave->bond;
2069 struct slave *slave_iter;
2070 struct list_head *iter;
ee637714 2071 bool dummy_slave_update; /* Ignore this value as caller updates array */
a361c83c 2072
e470259f
NA		 2073 /* Sync against bond_3ad_state_machine_handler() */
2074 spin_lock_bh(&bond->mode_lock);
3fdddd85 2075 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
2076 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2077
3bf2d28a 2078 /* if slave is null, the whole port is not initialized */
1da177e4 2079 if (!port->slave) {
d4471f5e
VF		 2080 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
2081 slave->dev->name);
e470259f 2082 goto out;
1da177e4
LT		 2083 }
2084
d4471f5e
VF		 2085 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
2086 aggregator->aggregator_identifier);
1da177e4
LT		 2087
2088 /* Tell the partner that this port is not suitable for aggregation */
032fd240
TP		 2089 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
2090 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
2091 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
1da177e4
LT		 2092 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
2093 __update_lacpdu_from_port(port);
2094 ad_lacpdu_send(port);
2095
3bf2d28a 2096 /* check if this aggregator is occupied */
1da177e4 2097 if (aggregator->lag_ports) {
3bf2d28a
VF		 2098 /* check if there are other ports related to this aggregator
2099 * except the port related to this slave(thats ensure us that
2100 * there is a reason to search for new aggregator, and that we
2101 * will find one
2102 */
2103 if ((aggregator->lag_ports != port) ||
2104 (aggregator->lag_ports->next_port_in_aggregator)) {
2105 /* find new aggregator for the related port(s) */
0b088264 2106 bond_for_each_slave(bond, slave_iter, iter) {
3fdddd85 2107 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
3bf2d28a
VF		 2108 /* if the new aggregator is empty, or it is
2109 * connected to our port only
2110 */
2111 if (!new_aggregator->lag_ports ||
2112 ((new_aggregator->lag_ports == port) &&
2113 !new_aggregator->lag_ports->next_port_in_aggregator))
1da177e4 2114 break;
1da177e4 2115 }
0b088264
VF		 2116 if (!slave_iter)
2117 new_aggregator = NULL;
3bf2d28a
VF		 2118
2119 /* if new aggregator found, copy the aggregator's
2120 * parameters and connect the related lag_ports to the
2121 * new aggregator
2122 */
1da177e4 2123 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
d4471f5e
VF		 2124 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2125 aggregator->aggregator_identifier,
2126 new_aggregator->aggregator_identifier);
1da177e4 2127
3bf2d28a
VF		 2128 if ((new_aggregator->lag_ports == port) &&
2129 new_aggregator->is_active) {
d4471f5e 2130 netdev_info(bond->dev, "Removing an active aggregator\n");
1da177e4
LT		 2131 select_new_active_agg = 1;
2132 }
2133
2134 new_aggregator->is_individual = aggregator->is_individual;
2135 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2136 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2137 new_aggregator->partner_system = aggregator->partner_system;
2138 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2139 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2140 new_aggregator->receive_state = aggregator->receive_state;
2141 new_aggregator->transmit_state = aggregator->transmit_state;
2142 new_aggregator->lag_ports = aggregator->lag_ports;
2143 new_aggregator->is_active = aggregator->is_active;
2144 new_aggregator->num_of_ports = aggregator->num_of_ports;
2145
3bf2d28a
VF		 2146 /* update the information that is written on
2147 * the ports about the aggregator
2148 */
128ea6c3
BD		 2149 for (temp_port = aggregator->lag_ports; temp_port;
2150 temp_port = temp_port->next_port_in_aggregator) {
2151 temp_port->aggregator = new_aggregator;
1da177e4
LT		 2152 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2153 }
2154
1da177e4 2155 ad_clear_agg(aggregator);
a361c83c 2156
7bfc4753 2157 if (select_new_active_agg)
ee637714
MB		 2158 ad_agg_selection_logic(__get_first_agg(port),
2159 &dummy_slave_update);
1da177e4 2160 } else {
d4471f5e 2161 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
1da177e4 2162 }
3bf2d28a
VF		 2163 } else {
2164 /* in case that the only port related to this
2165 * aggregator is the one we want to remove
2166 */
1da177e4 2167 select_new_active_agg = aggregator->is_active;
1da177e4
LT		 2168 ad_clear_agg(aggregator);
2169 if (select_new_active_agg) {
d4471f5e 2170 netdev_info(bond->dev, "Removing an active aggregator\n");
3bf2d28a 2171 /* select new active aggregator */
74684493
VF		 2172 temp_aggregator = __get_first_agg(port);
2173 if (temp_aggregator)
ee637714
MB		 2174 ad_agg_selection_logic(temp_aggregator,
2175 &dummy_slave_update);
1da177e4
LT		 2176 }
2177 }
2178 }
2179
d4471f5e 2180 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
3bf2d28a
VF		 2181
2182 /* find the aggregator that this port is connected to */
0b088264 2183 bond_for_each_slave(bond, slave_iter, iter) {
3fdddd85 2184 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
1da177e4 2185 prev_port = NULL;
3bf2d28a 2186 /* search the port in the aggregator's related ports */
128ea6c3
BD		 2187 for (temp_port = temp_aggregator->lag_ports; temp_port;
2188 prev_port = temp_port,
3bf2d28a
VF		 2189 temp_port = temp_port->next_port_in_aggregator) {
2190 if (temp_port == port) {
2191 /* the aggregator found - detach the port from
2192 * this aggregator
2193 */
7bfc4753 2194 if (prev_port)
1da177e4 2195 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
7bfc4753 2196 else
1da177e4 2197 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
1da177e4 2198 temp_aggregator->num_of_ports--;
0622cab0 2199 if (__agg_active_ports(temp_aggregator) == 0) {
1da177e4 2200 select_new_active_agg = temp_aggregator->is_active;
1da177e4
LT		 2201 ad_clear_agg(temp_aggregator);
2202 if (select_new_active_agg) {
d4471f5e 2203 netdev_info(bond->dev, "Removing an active aggregator\n");
3bf2d28a 2204 /* select new active aggregator */
ee637714
MB		 2205 ad_agg_selection_logic(__get_first_agg(port),
2206 &dummy_slave_update);
1da177e4
LT		 2207 }
2208 }
2209 break;
2210 }
2211 }
2212 }
128ea6c3 2213 port->slave = NULL;
e470259f
NA		 2214
2215out:
2216 spin_unlock_bh(&bond->mode_lock);
1da177e4
LT		 2217}
2218
5ee14e6d
NA		 2219/**
2220 * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports
2221 * @bond: bonding struct to work on
2222 *
2223 * If an ad_actor setting gets changed we need to update the individual port
2224 * settings so the bond device will use the new values when it gets upped.
2225 */
2226void bond_3ad_update_ad_actor_settings(struct bonding *bond)
2227{
2228 struct list_head *iter;
2229 struct slave *slave;
2230
2231 ASSERT_RTNL();
2232
2233 BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio;
2234 if (is_zero_ether_addr(bond->params.ad_actor_system))
2235 BOND_AD_INFO(bond).system.sys_mac_addr =
2236 *((struct mac_addr *)bond->dev->dev_addr);
2237 else
2238 BOND_AD_INFO(bond).system.sys_mac_addr =
2239 *((struct mac_addr *)bond->params.ad_actor_system);
2240
2241 spin_lock_bh(&bond->mode_lock);
7f20cd25
NA		 2242 bond_for_each_slave(bond, slave, iter) {
2243 struct port *port = &(SLAVE_AD_INFO(slave))->port;
2244
2245 __ad_actor_update_port(port);
2246 port->ntt = true;
2247 }
5ee14e6d
NA		 2248 spin_unlock_bh(&bond->mode_lock);
2249}
2250
1da177e4
LT		 2251/**
2252 * bond_3ad_state_machine_handler - handle state machines timeout
2253 * @bond: bonding struct to work on
2254 *
2255 * The state machine handling concept in this module is to check every tick
2256 * which state machine should operate any function. The execution order is
2257 * round robin, so when we have an interaction between state machines, the
2258 * reply of one to each other might be delayed until next tick.
2259 *
2260 * This function also complete the initialization when the agg_select_timer
2261 * times out, and it selects an aggregator for the ports that are yet not
2262 * related to any aggregator, and selects the active aggregator for a bond.
2263 */
1b76b316 2264void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2265{
1b76b316
JV		 2266 struct bonding *bond = container_of(work, struct bonding,
2267 ad_work.work);
1da177e4 2268 struct aggregator *aggregator;
3c4c88a1
VF		 2269 struct list_head *iter;
2270 struct slave *slave;
2271 struct port *port;
5e5b0665 2272 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
ee637714 2273 bool update_slave_arr = false;
1da177e4 2274
e470259f
NA		 2275 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2276 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2277 * concurrently due to incoming LACPDU as well.
2278 */
b7435628 2279 spin_lock_bh(&bond->mode_lock);
be79bd04 2280 rcu_read_lock();
1f2cd845 2281
be79bd04 2282 /* check if there are any slaves */
0965a1f3 2283 if (!bond_has_slaves(bond))
1da177e4 2284 goto re_arm;
1da177e4 2285
be79bd04 2286 /* check if agg_select_timer timer after initialize is timed out */
3bf2d28a
VF		 2287 if (BOND_AD_INFO(bond).agg_select_timer &&
2288 !(--BOND_AD_INFO(bond).agg_select_timer)) {
be79bd04 2289 slave = bond_first_slave_rcu(bond);
3fdddd85 2290 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
fe9323da 2291
be79bd04 2292 /* select the active aggregator for the bond */
fe9323da 2293 if (port) {
1da177e4 2294 if (!port->slave) {
d4471f5e
VF		 2295 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2296 bond->dev->name);
1da177e4
LT		 2297 goto re_arm;
2298 }
2299
2300 aggregator = __get_first_agg(port);
ee637714 2301 ad_agg_selection_logic(aggregator, &update_slave_arr);
1da177e4 2302 }
f0c76d61 2303 bond_3ad_set_carrier(bond);
1da177e4
LT		 2304 }
2305
be79bd04 2306 /* for each port run the state machines */
2307 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 2308 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2309 if (!port->slave) {
d4471f5e 2310 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
86a2b9cf 2311 bond->dev->name);
1da177e4
LT		 2312 goto re_arm;
2313 }
2314
2315 ad_rx_machine(NULL, port);
2316 ad_periodic_machine(port);
ee637714
MB		 2317 ad_port_selection_logic(port, &update_slave_arr);
2318 ad_mux_machine(port, &update_slave_arr);
1da177e4 2319 ad_tx_machine(port);
14c9551a 2320 ad_churn_machine(port);
1da177e4 2321
be79bd04 2322 /* turn off the BEGIN bit, since we already handled it */
7bfc4753 2323 if (port->sm_vars & AD_PORT_BEGIN)
1da177e4 2324 port->sm_vars &= ~AD_PORT_BEGIN;
1da177e4
LT		 2325 }
2326
2327re_arm:
5e5b0665 2328 bond_for_each_slave_rcu(bond, slave, iter) {
2329 if (slave->should_notify) {
2330 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2331 break;
2332 }
2333 }
be79bd04 2334 rcu_read_unlock();
b7435628 2335 spin_unlock_bh(&bond->mode_lock);
5e5b0665 2336
ee637714
MB		 2337 if (update_slave_arr)
2338 bond_slave_arr_work_rearm(bond, 0);
2339
5e5b0665 2340 if (should_notify_rtnl && rtnl_trylock()) {
b0929915 2341 bond_slave_state_notify(bond);
5e5b0665 2342 rtnl_unlock();
2343 }
be79bd04 2344 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1da177e4
LT		 2345}
2346
2347/**
2348 * bond_3ad_rx_indication - handle a received frame
2349 * @lacpdu: received lacpdu
2350 * @slave: slave struct to work on
2351 * @length: length of the data received
2352 *
2353 * It is assumed that frames that were sent on this NIC don't returned as new
2354 * received frames (loopback). Since only the payload is given to this
2355 * function, it check for loopback.
2356 */
3bf2d28a
VF		 2357static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2358 u16 length)
1da177e4
LT		 2359{
2360 struct port *port;
13a8e0c8 2361 int ret = RX_HANDLER_ANOTHER;
1da177e4
LT		 2362
2363 if (length >= sizeof(struct lacpdu)) {
2364
3fdddd85 2365 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4
LT		 2366
2367 if (!port->slave) {
d4471f5e
VF		 2368 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2369 slave->dev->name, slave->bond->dev->name);
13a8e0c8 2370 return ret;
1da177e4
LT		 2371 }
2372
2373 switch (lacpdu->subtype) {
2374 case AD_TYPE_LACPDU:
13a8e0c8 2375 ret = RX_HANDLER_CONSUMED;
2f637324
SA		 2376 netdev_dbg(slave->bond->dev,
2377 "Received LACPDU on port %d slave %s\n",
2378 port->actor_port_number,
2379 slave->dev->name);
16d79d7d 2380 /* Protect against concurrent state machines */
e470259f 2381 spin_lock(&slave->bond->mode_lock);
1da177e4 2382 ad_rx_machine(lacpdu, port);
e470259f 2383 spin_unlock(&slave->bond->mode_lock);
1da177e4
LT		 2384 break;
2385
2386 case AD_TYPE_MARKER:
13a8e0c8 2387 ret = RX_HANDLER_CONSUMED;
3bf2d28a
VF		 2388 /* No need to convert fields to Little Endian since we
2389 * don't use the marker's fields.
2390 */
1da177e4 2391
1c3f0b8e 2392 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2393 case AD_MARKER_INFORMATION_SUBTYPE:
d4471f5e
VF		 2394 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2395 port->actor_port_number);
1c3f0b8e 2396 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2397 break;
2398
2399 case AD_MARKER_RESPONSE_SUBTYPE:
d4471f5e
VF		 2400 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2401 port->actor_port_number);
1c3f0b8e 2402 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2403 break;
2404
2405 default:
d4471f5e
VF		 2406 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2407 port->actor_port_number);
1da177e4
LT		 2408 }
2409 }
2410 }
13a8e0c8 2411 return ret;
1da177e4
LT		 2412}
2413
7bb11dc9
MB		 2414/**
2415 * ad_update_actor_keys - Update the oper / admin keys for a port based on
2416 * its current speed and duplex settings.
2417 *
2418 * @port: the port we'are looking at
2419 * @reset: Boolean to just reset the speed and the duplex part of the key
2420 *
2421 * The logic to change the oper / admin keys is:
2422 * (a) A full duplex port can participate in LACP with partner.
2423 * (b) When the speed is changed, LACP need to be reinitiated.
2424 */
2425static void ad_update_actor_keys(struct port *port, bool reset)
2426{
2427 u8 duplex = 0;
2428 u16 ospeed = 0, speed = 0;
2429 u16 old_oper_key = port->actor_oper_port_key;
2430
2431 port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS);
2432 if (!reset) {
2433 speed = __get_link_speed(port);
2434 ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1;
2435 duplex = __get_duplex(port);
2436 port->actor_admin_port_key |= (speed << 1) | duplex;
2437 }
2438 port->actor_oper_port_key = port->actor_admin_port_key;
2439
2440 if (old_oper_key != port->actor_oper_port_key) {
2441 /* Only 'duplex' port participates in LACP */
2442 if (duplex)
2443 port->sm_vars |= AD_PORT_LACP_ENABLED;
2444 else
2445 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
2446
2447 if (!reset) {
2448 if (!speed) {
2449 netdev_err(port->slave->dev,
2450 "speed changed to 0 for port %s",
2451 port->slave->dev->name);
2452 } else if (duplex && ospeed != speed) {
2453 /* Speed change restarts LACP state-machine */
2454 port->sm_vars |= AD_PORT_BEGIN;
2455 }
2456 }
2457 }
2458}
2459
1da177e4 2460/**
52bc6716
MB		 2461 * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex
2462 * change indication
1da177e4 2463 *
1da177e4
LT		 2464 * @slave: slave struct to work on
2465 *
2466 * Handle reselection of aggregator (if needed) for this port.
2467 */
52bc6716 2468void bond_3ad_adapter_speed_duplex_changed(struct slave *slave)
1da177e4
LT		 2469{
2470 struct port *port;
2471
3fdddd85 2472 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2473
bca44a73 2474 /* if slave is null, the whole port is not initialized */
1da177e4 2475 if (!port->slave) {
52bc6716
MB		 2476 netdev_warn(slave->bond->dev,
2477 "speed/duplex changed for uninitialized port %s\n",
d4471f5e 2478 slave->dev->name);
1da177e4
LT		 2479 return;
2480 }
2481
e470259f 2482 spin_lock_bh(&slave->bond->mode_lock);
7bb11dc9 2483 ad_update_actor_keys(port, false);
e292dcae 2484 spin_unlock_bh(&slave->bond->mode_lock);
52bc6716 2485 netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n",
2f637324 2486 port->actor_port_number, slave->dev->name);
1da177e4
LT		 2487}
2488
2489/**
2490 * bond_3ad_handle_link_change - handle a slave's link status change indication
2491 * @slave: slave struct to work on
2492 * @status: whether the link is now up or down
2493 *
2494 * Handle reselection of aggregator (if needed) for this port.
2495 */
2496void bond_3ad_handle_link_change(struct slave *slave, char link)
2497{
0622cab0 2498 struct aggregator *agg;
1da177e4 2499 struct port *port;
0622cab0 2500 bool dummy;
1da177e4 2501
3fdddd85 2502 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2503
108db736 2504 /* if slave is null, the whole port is not initialized */
1da177e4 2505 if (!port->slave) {
d4471f5e
VF		 2506 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2507 slave->dev->name);
1da177e4
LT		 2508 return;
2509 }
2510
e470259f 2511 spin_lock_bh(&slave->bond->mode_lock);
108db736 2512 /* on link down we are zeroing duplex and speed since
2513 * some of the adaptors(ce1000.lan) report full duplex/speed
2514 * instead of N/A(duplex) / 0(speed).
2515 *
2516 * on link up we are forcing recheck on the duplex and speed since
2517 * some of he adaptors(ce1000.lan) report.
2518 */
1da177e4 2519 if (link == BOND_LINK_UP) {
f48127b6 2520 port->is_enabled = true;
7bb11dc9 2521 ad_update_actor_keys(port, false);
1da177e4
LT		 2522 } else {
2523 /* link has failed */
f48127b6 2524 port->is_enabled = false;
7bb11dc9 2525 ad_update_actor_keys(port, true);
1da177e4 2526 }
0622cab0
JV		 2527 agg = __get_first_agg(port);
2528 ad_agg_selection_logic(agg, &dummy);
2529
e292dcae
MB		 2530 spin_unlock_bh(&slave->bond->mode_lock);
2531
d4471f5e
VF		 2532 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2533 port->actor_port_number,
2534 link == BOND_LINK_UP ? "UP" : "DOWN");
108db736 2535
ee637714
MB		 2536 /* RTNL is held and mode_lock is released so it's safe
2537 * to update slave_array here.
2538 */
2539 bond_update_slave_arr(slave->bond, NULL);
1da177e4
LT		 2540}
2541
3bf2d28a
VF		 2542/**
2543 * bond_3ad_set_carrier - set link state for bonding master
2544 * @bond - bonding structure
2545 *
2546 * if we have an active aggregator, we're up, if not, we're down.
2547 * Presumes that we cannot have an active aggregator if there are
2548 * no slaves with link up.
ff59c456 2549 *
031ae4de
JV		 2550 * This behavior complies with IEEE 802.3 section 43.3.9.
2551 *
ff59c456
JV		 2552 * Called by bond_set_carrier(). Return zero if carrier state does not
2553 * change, nonzero if it does.
2554 */
2555int bond_3ad_set_carrier(struct bonding *bond)
2556{
655f8919 2557 struct aggregator *active;
dec1e90e 2558 struct slave *first_slave;
c1bc9644 2559 int ret = 1;
655f8919 2560
be79bd04 2561 rcu_read_lock();
2562 first_slave = bond_first_slave_rcu(bond);
c1bc9644
VF		 2563 if (!first_slave) {
2564 ret = 0;
2565 goto out;
2566 }
3fdddd85 2567 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
655f8919 2568 if (active) {
2569 /* are enough slaves available to consider link up? */
0622cab0 2570 if (__agg_active_ports(active) < bond->params.min_links) {
655f8919 2571 if (netif_carrier_ok(bond->dev)) {
2572 netif_carrier_off(bond->dev);
c1bc9644 2573 goto out;
655f8919 2574 }
2575 } else if (!netif_carrier_ok(bond->dev)) {
ff59c456 2576 netif_carrier_on(bond->dev);
c1bc9644 2577 goto out;
ff59c456 2578 }
c1bc9644 2579 } else if (netif_carrier_ok(bond->dev)) {
ff59c456 2580 netif_carrier_off(bond->dev);
ff59c456 2581 }
c1bc9644
VF		 2582out:
2583 rcu_read_unlock();
2584 return ret;
ff59c456
JV		 2585}
2586
1da177e4 2587/**
318debd8 2588 * __bond_3ad_get_active_agg_info - get information of the active aggregator
1da177e4
LT		 2589 * @bond: bonding struct to work on
2590 * @ad_info: ad_info struct to fill with the bond's info
2591 *
2592 * Returns: 0 on success
2593 * < 0 on error
2594 */
318debd8 2595int __bond_3ad_get_active_agg_info(struct bonding *bond,
2596 struct ad_info *ad_info)
1da177e4
LT		 2597{
2598 struct aggregator *aggregator = NULL;
3c4c88a1
VF		 2599 struct list_head *iter;
2600 struct slave *slave;
1da177e4
LT		 2601 struct port *port;
2602
47e91f56 2603 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 2604 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4
LT		 2605 if (port->aggregator && port->aggregator->is_active) {
2606 aggregator = port->aggregator;
2607 break;
2608 }
2609 }
2610
21f374c6
JP		 2611 if (!aggregator)
2612 return -1;
2613
2614 ad_info->aggregator_id = aggregator->aggregator_identifier;
751da2a6 2615 ad_info->ports = __agg_active_ports(aggregator);
21f374c6
JP		 2616 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2617 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2618 ether_addr_copy(ad_info->partner_system,
2619 aggregator->partner_system.mac_addr_value);
2620 return 0;
1da177e4
LT		 2621}
2622
318debd8 2623int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2624{
2625 int ret;
2626
47e91f56 2627 rcu_read_lock();
318debd8 2628 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
47e91f56 2629 rcu_read_unlock();
318debd8 2630
2631 return ret;
2632}
2633
de063b70
ED		 2634int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2635 struct slave *slave)
1da177e4 2636{
de063b70
ED		 2637 struct lacpdu *lacpdu, _lacpdu;
2638
3aba891d 2639 if (skb->protocol != PKT_TYPE_LACPDU)
86e74986 2640 return RX_HANDLER_ANOTHER;
b3053251 2641
bb54e589
MB		 2642 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2643 return RX_HANDLER_ANOTHER;
2644
de063b70
ED		 2645 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2646 if (!lacpdu)
86e74986 2647 return RX_HANDLER_ANOTHER;
ab12811c 2648
86e74986 2649 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
1da177e4 2650}
ba824a8b 2651
3bf2d28a
VF		 2652/**
2653 * bond_3ad_update_lacp_rate - change the lacp rate
2654 * @bond - bonding struct
2655 *
ba824a8b
PP		 2656 * When modify lacp_rate parameter via sysfs,
2657 * update actor_oper_port_state of each port.
2658 *
e470259f 2659 * Hold bond->mode_lock,
ba824a8b
PP		 2660 * so we can modify port->actor_oper_port_state,
2661 * no matter bond is up or down.
2662 */
2663void bond_3ad_update_lacp_rate(struct bonding *bond)
2664{
ba824a8b 2665 struct port *port = NULL;
9caff1e7 2666 struct list_head *iter;
c509316b 2667 struct slave *slave;
ba824a8b
PP		 2668 int lacp_fast;
2669
ba824a8b 2670 lacp_fast = bond->params.lacp_fast;
e470259f 2671 spin_lock_bh(&bond->mode_lock);
9caff1e7 2672 bond_for_each_slave(bond, slave, iter) {
3fdddd85 2673 port = &(SLAVE_AD_INFO(slave)->port);
ba824a8b
PP		 2674 if (lacp_fast)
2675 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2676 else
2677 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
ba824a8b 2678 }
e470259f 2679 spin_unlock_bh(&bond->mode_lock);
ba824a8b 2680}
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