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bonding: Verify RX LACPDU has proper dest mac-addr
[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
73
3bf2d28a
VF		 74/* Port Key definitions
75 * key is determined according to the link speed, duplex and
76 * user key (which is yet not supported)
77 * --------------------------------------------------------------
78 * Port key : | User key | Speed | Duplex |
79 * --------------------------------------------------------------
80 * 16 6 1 0
81 */
cb8dda90
JX		 82#define AD_DUPLEX_KEY_MASKS 0x1
83#define AD_SPEED_KEY_MASKS 0x3E
84#define AD_USER_KEY_MASKS 0xFFC0
85
86enum ad_link_speed_type {
87 AD_LINK_SPEED_1MBPS = 1,
88 AD_LINK_SPEED_10MBPS,
89 AD_LINK_SPEED_100MBPS,
90 AD_LINK_SPEED_1000MBPS,
424c3232
JX		 91 AD_LINK_SPEED_2500MBPS,
92 AD_LINK_SPEED_10000MBPS,
93 AD_LINK_SPEED_20000MBPS,
94 AD_LINK_SPEED_40000MBPS,
95 AD_LINK_SPEED_56000MBPS
cb8dda90 96};
1da177e4 97
815117ad 98/* compare MAC addresses */
99#define MAC_ADDRESS_EQUAL(A, B) \
100 ether_addr_equal_64bits((const u8 *)A, (const u8 *)B)
1da177e4 101
128ea6c3 102static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
1da177e4
LT		 103static u16 ad_ticks_per_sec;
104static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
105
e4ac4320
HE		 106static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
107
3bf2d28a 108/* ================= main 802.3ad protocol functions ================== */
1da177e4 109static int ad_lacpdu_send(struct port *port);
1c3f0b8e 110static int ad_marker_send(struct port *port, struct bond_marker *marker);
ee637714 111static void ad_mux_machine(struct port *port, bool *update_slave_arr);
1da177e4
LT		 112static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
113static void ad_tx_machine(struct port *port);
114static void ad_periodic_machine(struct port *port);
ee637714
MB		 115static void ad_port_selection_logic(struct port *port, bool *update_slave_arr);
116static void ad_agg_selection_logic(struct aggregator *aggregator,
117 bool *update_slave_arr);
1da177e4
LT		 118static void ad_clear_agg(struct aggregator *aggregator);
119static void ad_initialize_agg(struct aggregator *aggregator);
120static void ad_initialize_port(struct port *port, int lacp_fast);
ee637714
MB		 121static void ad_enable_collecting_distributing(struct port *port,
122 bool *update_slave_arr);
123static void ad_disable_collecting_distributing(struct port *port,
124 bool *update_slave_arr);
3bf2d28a
VF		 125static void ad_marker_info_received(struct bond_marker *marker_info,
126 struct port *port);
127static void ad_marker_response_received(struct bond_marker *marker,
128 struct port *port);
1da177e4
LT		 129
130
3bf2d28a 131/* ================= api to bonding and kernel code ================== */
1da177e4
LT		 132
133/**
134 * __get_bond_by_port - get the port's bonding struct
135 * @port: the port we're looking at
136 *
137 * Return @port's bonding struct, or %NULL if it can't be found.
138 */
139static inline struct bonding *__get_bond_by_port(struct port *port)
140{
7bfc4753 141 if (port->slave == NULL)
1da177e4 142 return NULL;
1da177e4
LT		 143
144 return bond_get_bond_by_slave(port->slave);
145}
146
1da177e4
LT		 147/**
148 * __get_first_agg - get the first aggregator in the bond
149 * @bond: the bond we're looking at
150 *
151 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
152 * found.
768b9549 153 * The caller must hold RCU or RTNL lock.
1da177e4
LT		 154 */
155static inline struct aggregator *__get_first_agg(struct port *port)
156{
157 struct bonding *bond = __get_bond_by_port(port);
dec1e90e 158 struct slave *first_slave;
768b9549 159 struct aggregator *agg;
1da177e4 160
be79bd04 161 /* If there's no bond for this port, or bond has no slaves */
dec1e90e 162 if (bond == NULL)
1da177e4 163 return NULL;
3bf2d28a 164
be79bd04 165 rcu_read_lock();
166 first_slave = bond_first_slave_rcu(bond);
3fdddd85 167 agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL;
be79bd04 168 rcu_read_unlock();
3bf2d28a 169
768b9549 170 return agg;
1da177e4
LT		 171}
172
3bf2d28a
VF		 173/**
174 * __agg_has_partner - see if we have a partner
175 * @agg: the agregator we're looking at
fd989c83
JV		 176 *
177 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
3bf2d28a 178 * address for the partner). Return 0 if not.
fd989c83
JV		 179 */
180static inline int __agg_has_partner(struct aggregator *agg)
181{
182 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
183}
184
1da177e4
LT		 185/**
186 * __disable_port - disable the port's slave
187 * @port: the port we're looking at
1da177e4
LT		 188 */
189static inline void __disable_port(struct port *port)
190{
5e5b0665 191 bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER);
1da177e4
LT		 192}
193
194/**
195 * __enable_port - enable the port's slave, if it's up
196 * @port: the port we're looking at
1da177e4
LT		 197 */
198static inline void __enable_port(struct port *port)
199{
200 struct slave *slave = port->slave;
201
b6adc610 202 if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave))
5e5b0665 203 bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER);
1da177e4
LT		 204}
205
206/**
207 * __port_is_enabled - check if the port's slave is in active state
208 * @port: the port we're looking at
1da177e4
LT		 209 */
210static inline int __port_is_enabled(struct port *port)
211{
e30bc066 212 return bond_is_active_slave(port->slave);
1da177e4
LT		 213}
214
215/**
216 * __get_agg_selection_mode - get the aggregator selection mode
217 * @port: the port we're looking at
218 *
fd989c83 219 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
1da177e4
LT		 220 */
221static inline u32 __get_agg_selection_mode(struct port *port)
222{
223 struct bonding *bond = __get_bond_by_port(port);
224
7bfc4753 225 if (bond == NULL)
fd989c83 226 return BOND_AD_STABLE;
1da177e4 227
1a14fbcb 228 return bond->params.ad_select;
1da177e4
LT		 229}
230
231/**
232 * __check_agg_selection_timer - check if the selection timer has expired
233 * @port: the port we're looking at
1da177e4
LT		 234 */
235static inline int __check_agg_selection_timer(struct port *port)
236{
237 struct bonding *bond = __get_bond_by_port(port);
238
7bfc4753 239 if (bond == NULL)
1da177e4 240 return 0;
1da177e4
LT		 241
242 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
243}
244
1da177e4
LT		 245/**
246 * __get_link_speed - get a port's speed
247 * @port: the port we're looking at
248 *
cb8dda90 249 * Return @port's speed in 802.3ad enum format. i.e. one of:
1da177e4 250 * 0,
cb8dda90
JX		 251 * %AD_LINK_SPEED_10MBPS,
252 * %AD_LINK_SPEED_100MBPS,
253 * %AD_LINK_SPEED_1000MBPS,
424c3232 254 * %AD_LINK_SPEED_2500MBPS,
cb8dda90 255 * %AD_LINK_SPEED_10000MBPS
424c3232
JX		 256 * %AD_LINK_SPEED_20000MBPS
257 * %AD_LINK_SPEED_40000MBPS
258 * %AD_LINK_SPEED_56000MBPS
1da177e4
LT		 259 */
260static u16 __get_link_speed(struct port *port)
261{
262 struct slave *slave = port->slave;
263 u16 speed;
264
3bf2d28a
VF		 265 /* this if covers only a special case: when the configuration starts
266 * with link down, it sets the speed to 0.
267 * This is done in spite of the fact that the e100 driver reports 0
268 * to be compatible with MVT in the future.
269 */
7bfc4753 270 if (slave->link != BOND_LINK_UP)
128ea6c3 271 speed = 0;
7bfc4753 272 else {
1da177e4
LT		 273 switch (slave->speed) {
274 case SPEED_10:
cb8dda90 275 speed = AD_LINK_SPEED_10MBPS;
1da177e4
LT		 276 break;
277
278 case SPEED_100:
cb8dda90 279 speed = AD_LINK_SPEED_100MBPS;
1da177e4
LT		 280 break;
281
282 case SPEED_1000:
cb8dda90 283 speed = AD_LINK_SPEED_1000MBPS;
1da177e4
LT		 284 break;
285
424c3232
JX		 286 case SPEED_2500:
287 speed = AD_LINK_SPEED_2500MBPS;
288 break;
289
94dbffd5 290 case SPEED_10000:
cb8dda90 291 speed = AD_LINK_SPEED_10000MBPS;
94dbffd5
JV		 292 break;
293
424c3232
JX		 294 case SPEED_20000:
295 speed = AD_LINK_SPEED_20000MBPS;
296 break;
297
298 case SPEED_40000:
299 speed = AD_LINK_SPEED_40000MBPS;
300 break;
301
302 case SPEED_56000:
303 speed = AD_LINK_SPEED_56000MBPS;
304 break;
305
1da177e4 306 default:
3bf2d28a
VF		 307 /* unknown speed value from ethtool. shouldn't happen */
308 speed = 0;
1da177e4
LT		 309 break;
310 }
311 }
312
d4471f5e
VF		 313 netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n",
314 port->actor_port_number, speed);
1da177e4
LT		 315 return speed;
316}
317
318/**
319 * __get_duplex - get a port's duplex
320 * @port: the port we're looking at
321 *
322 * Return @port's duplex in 802.3ad bitmask format. i.e.:
323 * 0x01 if in full duplex
324 * 0x00 otherwise
325 */
326static u8 __get_duplex(struct port *port)
327{
328 struct slave *slave = port->slave;
1da177e4
LT		 329 u8 retval;
330
3bf2d28a
VF		 331 /* handling a special case: when the configuration starts with
332 * link down, it sets the duplex to 0.
333 */
547942ca 334 if (slave->link != BOND_LINK_UP) {
128ea6c3 335 retval = 0x0;
547942ca 336 } else {
1da177e4
LT		 337 switch (slave->duplex) {
338 case DUPLEX_FULL:
128ea6c3 339 retval = 0x1;
d4471f5e
VF		 340 netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n",
341 port->actor_port_number);
1da177e4
LT		 342 break;
343 case DUPLEX_HALF:
344 default:
128ea6c3 345 retval = 0x0;
d4471f5e
VF		 346 netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n",
347 port->actor_port_number);
1da177e4
LT		 348 break;
349 }
350 }
351 return retval;
352}
353
3bf2d28a 354/* Conversions */
1da177e4
LT		 355
356/**
357 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
358 * @timer_type: which timer to operate
359 * @par: timer parameter. see below
360 *
361 * If @timer_type is %current_while_timer, @par indicates long/short timer.
362 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
3bf2d28a 363 * %SLOW_PERIODIC_TIME.
1da177e4
LT		 364 */
365static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
366{
128ea6c3 367 u16 retval = 0; /* to silence the compiler */
1da177e4
LT		 368
369 switch (timer_type) {
3bf2d28a 370 case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */
7bfc4753 371 if (par)
3bf2d28a 372 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec);
7bfc4753 373 else
3bf2d28a 374 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec);
1da177e4 375 break;
3bf2d28a 376 case AD_ACTOR_CHURN_TIMER: /* for local churn machine */
1da177e4
LT		 377 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
378 break;
3bf2d28a
VF		 379 case AD_PERIODIC_TIMER: /* for periodic machine */
380 retval = (par*ad_ticks_per_sec); /* long timeout */
1da177e4 381 break;
3bf2d28a 382 case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */
1da177e4
LT		 383 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
384 break;
3bf2d28a 385 case AD_WAIT_WHILE_TIMER: /* for selection machine */
1da177e4
LT		 386 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
387 break;
388 }
3bf2d28a 389
1da177e4
LT		 390 return retval;
391}
392
393
3bf2d28a 394/* ================= ad_rx_machine helper functions ================== */
1da177e4 395
2d6682db
JV		 396/**
397 * __choose_matched - update a port's matched variable from a received lacpdu
398 * @lacpdu: the lacpdu we've received
399 * @port: the port we're looking at
400 *
401 * Update the value of the matched variable, using parameter values from a
402 * newly received lacpdu. Parameter values for the partner carried in the
403 * received PDU are compared with the corresponding operational parameter
404 * values for the actor. Matched is set to TRUE if all of these parameters
405 * match and the PDU parameter partner_state.aggregation has the same value as
406 * actor_oper_port_state.aggregation and lacp will actively maintain the link
407 * in the aggregation. Matched is also set to TRUE if the value of
408 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
409 * an individual link and lacp will actively maintain the link. Otherwise,
410 * matched is set to FALSE. LACP is considered to be actively maintaining the
411 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
412 * the actor's actor_oper_port_state.lacp_activity and the PDU's
413 * partner_state.lacp_activity variables are TRUE.
414 *
415 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
416 * used here to implement the language from 802.3ad 43.4.9 that requires
417 * recordPDU to "match" the LACPDU parameters to the stored values.
418 */
419static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
420{
815117ad 421 /* check if all parameters are alike
422 * or this is individual link(aggregation == FALSE)
423 * then update the state machine Matched variable.
424 */
2d6682db
JV		 425 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
426 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
815117ad 427 MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) &&
2d6682db
JV		 428 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
429 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
430 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
2d6682db
JV		 431 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
432 ) {
2d6682db
JV		 433 port->sm_vars |= AD_PORT_MATCHED;
434 } else {
435 port->sm_vars &= ~AD_PORT_MATCHED;
436 }
437}
438
1da177e4
LT		 439/**
440 * __record_pdu - record parameters from a received lacpdu
441 * @lacpdu: the lacpdu we've received
442 * @port: the port we're looking at
443 *
444 * Record the parameter values for the Actor carried in a received lacpdu as
445 * the current partner operational parameter values and sets
446 * actor_oper_port_state.defaulted to FALSE.
447 */
448static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
449{
1da177e4 450 if (lacpdu && port) {
b99d6ba9
HE		 451 struct port_params *partner = &port->partner_oper;
452
2d6682db 453 __choose_matched(lacpdu, port);
3bf2d28a
VF		 454 /* record the new parameter values for the partner
455 * operational
456 */
b99d6ba9
HE		 457 partner->port_number = ntohs(lacpdu->actor_port);
458 partner->port_priority = ntohs(lacpdu->actor_port_priority);
459 partner->system = lacpdu->actor_system;
460 partner->system_priority = ntohs(lacpdu->actor_system_priority);
461 partner->key = ntohs(lacpdu->actor_key);
462 partner->port_state = lacpdu->actor_state;
1da177e4 463
3bf2d28a 464 /* set actor_oper_port_state.defaulted to FALSE */
1da177e4
LT		 465 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
466
3bf2d28a
VF		 467 /* set the partner sync. to on if the partner is sync,
468 * and the port is matched
469 */
63b46242
WK		 470 if ((port->sm_vars & AD_PORT_MATCHED) &&
471 (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) {
b99d6ba9 472 partner->port_state |= AD_STATE_SYNCHRONIZATION;
63b46242
WK		 473 pr_debug("%s partner sync=1\n", port->slave->dev->name);
474 } else {
b99d6ba9 475 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
63b46242
WK		 476 pr_debug("%s partner sync=0\n", port->slave->dev->name);
477 }
1da177e4
LT		 478 }
479}
480
481/**
482 * __record_default - record default parameters
483 * @port: the port we're looking at
484 *
485 * This function records the default parameter values for the partner carried
486 * in the Partner Admin parameters as the current partner operational parameter
487 * values and sets actor_oper_port_state.defaulted to TRUE.
488 */
489static void __record_default(struct port *port)
490{
1da177e4 491 if (port) {
3bf2d28a 492 /* record the partner admin parameters */
5eefd1ad
HE		 493 memcpy(&port->partner_oper, &port->partner_admin,
494 sizeof(struct port_params));
1da177e4 495
3bf2d28a 496 /* set actor_oper_port_state.defaulted to true */
1da177e4
LT		 497 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
498 }
499}
500
501/**
502 * __update_selected - update a port's Selected variable from a received lacpdu
503 * @lacpdu: the lacpdu we've received
504 * @port: the port we're looking at
505 *
506 * Update the value of the selected variable, using parameter values from a
507 * newly received lacpdu. The parameter values for the Actor carried in the
508 * received PDU are compared with the corresponding operational parameter
509 * values for the ports partner. If one or more of the comparisons shows that
510 * the value(s) received in the PDU differ from the current operational values,
511 * then selected is set to FALSE and actor_oper_port_state.synchronization is
512 * set to out_of_sync. Otherwise, selected remains unchanged.
513 */
514static void __update_selected(struct lacpdu *lacpdu, struct port *port)
515{
1da177e4 516 if (lacpdu && port) {
ce6a49ad
HE		 517 const struct port_params *partner = &port->partner_oper;
518
815117ad 519 /* check if any parameter is different then
520 * update the state machine selected variable.
521 */
8e95a202
JP		 522 if (ntohs(lacpdu->actor_port) != partner->port_number ||
523 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
815117ad 524 !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) ||
8e95a202
JP		 525 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
526 ntohs(lacpdu->actor_key) != partner->key ||
527 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 528 port->sm_vars &= ~AD_PORT_SELECTED;
529 }
530 }
531}
532
533/**
534 * __update_default_selected - update a port's Selected variable from Partner
535 * @port: the port we're looking at
536 *
537 * This function updates the value of the selected variable, using the partner
538 * administrative parameter values. The administrative values are compared with
539 * the corresponding operational parameter values for the partner. If one or
540 * more of the comparisons shows that the administrative value(s) differ from
541 * the current operational values, then Selected is set to FALSE and
542 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
543 * Selected remains unchanged.
544 */
545static void __update_default_selected(struct port *port)
546{
1da177e4 547 if (port) {
3c52065f
HE		 548 const struct port_params *admin = &port->partner_admin;
549 const struct port_params *oper = &port->partner_oper;
550
815117ad 551 /* check if any parameter is different then
552 * update the state machine selected variable.
553 */
8e95a202
JP		 554 if (admin->port_number != oper->port_number ||
555 admin->port_priority != oper->port_priority ||
815117ad 556 !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) ||
8e95a202
JP		 557 admin->system_priority != oper->system_priority ||
558 admin->key != oper->key ||
559 (admin->port_state & AD_STATE_AGGREGATION)
3c52065f 560 != (oper->port_state & AD_STATE_AGGREGATION)) {
1da177e4
LT		 561 port->sm_vars &= ~AD_PORT_SELECTED;
562 }
563 }
564}
565
1da177e4
LT		 566/**
567 * __update_ntt - update a port's ntt variable from a received lacpdu
568 * @lacpdu: the lacpdu we've received
569 * @port: the port we're looking at
570 *
571 * Updates the value of the ntt variable, using parameter values from a newly
572 * received lacpdu. The parameter values for the partner carried in the
573 * received PDU are compared with the corresponding operational parameter
574 * values for the Actor. If one or more of the comparisons shows that the
575 * value(s) received in the PDU differ from the current operational values,
576 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
577 */
578static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
579{
815117ad 580 /* validate lacpdu and port */
1da177e4 581 if (lacpdu && port) {
815117ad 582 /* check if any parameter is different then
583 * update the port->ntt.
584 */
89cc76f9
JV		 585 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
586 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
815117ad 587 !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) ||
89cc76f9
JV		 588 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
589 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
1da177e4
LT		 590 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
591 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
592 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
593 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
594 ) {
d238d458 595 port->ntt = true;
1da177e4
LT		 596 }
597 }
598}
599
1da177e4
LT		 600/**
601 * __agg_ports_are_ready - check if all ports in an aggregator are ready
602 * @aggregator: the aggregator we're looking at
603 *
604 */
605static int __agg_ports_are_ready(struct aggregator *aggregator)
606{
607 struct port *port;
608 int retval = 1;
609
610 if (aggregator) {
3bf2d28a
VF		 611 /* scan all ports in this aggregator to verfy if they are
612 * all ready.
613 */
128ea6c3
BD		 614 for (port = aggregator->lag_ports;
615 port;
616 port = port->next_port_in_aggregator) {
1da177e4
LT		 617 if (!(port->sm_vars & AD_PORT_READY_N)) {
618 retval = 0;
619 break;
620 }
621 }
622 }
623
624 return retval;
625}
626
627/**
628 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
629 * @aggregator: the aggregator we're looking at
630 * @val: Should the ports' ready bit be set on or off
631 *
632 */
633static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
634{
635 struct port *port;
636
128ea6c3
BD		 637 for (port = aggregator->lag_ports; port;
638 port = port->next_port_in_aggregator) {
7bfc4753 639 if (val)
1da177e4 640 port->sm_vars |= AD_PORT_READY;
7bfc4753 641 else
1da177e4 642 port->sm_vars &= ~AD_PORT_READY;
1da177e4
LT		 643 }
644}
645
646/**
647 * __get_agg_bandwidth - get the total bandwidth of an aggregator
648 * @aggregator: the aggregator we're looking at
649 *
650 */
651static u32 __get_agg_bandwidth(struct aggregator *aggregator)
652{
128ea6c3 653 u32 bandwidth = 0;
1da177e4
LT		 654
655 if (aggregator->num_of_ports) {
65cce19c 656 switch (__get_link_speed(aggregator->lag_ports)) {
cb8dda90 657 case AD_LINK_SPEED_1MBPS:
1da177e4
LT		 658 bandwidth = aggregator->num_of_ports;
659 break;
cb8dda90 660 case AD_LINK_SPEED_10MBPS:
1da177e4
LT		 661 bandwidth = aggregator->num_of_ports * 10;
662 break;
cb8dda90 663 case AD_LINK_SPEED_100MBPS:
1da177e4
LT		 664 bandwidth = aggregator->num_of_ports * 100;
665 break;
cb8dda90 666 case AD_LINK_SPEED_1000MBPS:
1da177e4
LT		 667 bandwidth = aggregator->num_of_ports * 1000;
668 break;
424c3232
JX		 669 case AD_LINK_SPEED_2500MBPS:
670 bandwidth = aggregator->num_of_ports * 2500;
671 break;
cb8dda90 672 case AD_LINK_SPEED_10000MBPS:
94dbffd5
JV		 673 bandwidth = aggregator->num_of_ports * 10000;
674 break;
424c3232
JX		 675 case AD_LINK_SPEED_20000MBPS:
676 bandwidth = aggregator->num_of_ports * 20000;
677 break;
678 case AD_LINK_SPEED_40000MBPS:
679 bandwidth = aggregator->num_of_ports * 40000;
680 break;
681 case AD_LINK_SPEED_56000MBPS:
682 bandwidth = aggregator->num_of_ports * 56000;
683 break;
1da177e4 684 default:
3bf2d28a 685 bandwidth = 0; /* to silence the compiler */
1da177e4
LT		 686 }
687 }
688 return bandwidth;
689}
690
691/**
692 * __get_active_agg - get the current active aggregator
693 * @aggregator: the aggregator we're looking at
49b7624e
VF		 694 *
695 * Caller must hold RCU lock.
1da177e4
LT		 696 */
697static struct aggregator *__get_active_agg(struct aggregator *aggregator)
698{
19177e7d
VF		 699 struct bonding *bond = aggregator->slave->bond;
700 struct list_head *iter;
701 struct slave *slave;
1da177e4 702
be79bd04 703 bond_for_each_slave_rcu(bond, slave, iter)
3fdddd85 704 if (SLAVE_AD_INFO(slave)->aggregator.is_active)
705 return &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4 706
19177e7d 707 return NULL;
1da177e4
LT		 708}
709
710/**
711 * __update_lacpdu_from_port - update a port's lacpdu fields
712 * @port: the port we're looking at
1da177e4
LT		 713 */
714static inline void __update_lacpdu_from_port(struct port *port)
715{
716 struct lacpdu *lacpdu = &port->lacpdu;
3b5b35d0 717 const struct port_params *partner = &port->partner_oper;
1da177e4 718
3bf2d28a
VF		 719 /* update current actual Actor parameters
720 * lacpdu->subtype initialized
1da177e4
LT		 721 * lacpdu->version_number initialized
722 * lacpdu->tlv_type_actor_info initialized
723 * lacpdu->actor_information_length initialized
724 */
725
d3bb52b0 726 lacpdu->actor_system_priority = htons(port->actor_system_priority);
1da177e4 727 lacpdu->actor_system = port->actor_system;
d3bb52b0
AV		 728 lacpdu->actor_key = htons(port->actor_oper_port_key);
729 lacpdu->actor_port_priority = htons(port->actor_port_priority);
730 lacpdu->actor_port = htons(port->actor_port_number);
1da177e4 731 lacpdu->actor_state = port->actor_oper_port_state;
63b46242
WK		 732 pr_debug("update lacpdu: %s, actor port state %x\n",
733 port->slave->dev->name, port->actor_oper_port_state);
1da177e4
LT		 734
735 /* lacpdu->reserved_3_1 initialized
736 * lacpdu->tlv_type_partner_info initialized
737 * lacpdu->partner_information_length initialized
738 */
739
3b5b35d0
HE		 740 lacpdu->partner_system_priority = htons(partner->system_priority);
741 lacpdu->partner_system = partner->system;
742 lacpdu->partner_key = htons(partner->key);
743 lacpdu->partner_port_priority = htons(partner->port_priority);
744 lacpdu->partner_port = htons(partner->port_number);
745 lacpdu->partner_state = partner->port_state;
1da177e4
LT		 746
747 /* lacpdu->reserved_3_2 initialized
748 * lacpdu->tlv_type_collector_info initialized
749 * lacpdu->collector_information_length initialized
750 * collector_max_delay initialized
751 * reserved_12[12] initialized
752 * tlv_type_terminator initialized
753 * terminator_length initialized
754 * reserved_50[50] initialized
755 */
1da177e4
LT		 756}
757
3bf2d28a 758/* ================= main 802.3ad protocol code ========================= */
1da177e4
LT		 759
760/**
761 * ad_lacpdu_send - send out a lacpdu packet on a given port
762 * @port: the port we're looking at
763 *
764 * Returns: 0 on success
765 * < 0 on error
766 */
767static int ad_lacpdu_send(struct port *port)
768{
769 struct slave *slave = port->slave;
770 struct sk_buff *skb;
771 struct lacpdu_header *lacpdu_header;
772 int length = sizeof(struct lacpdu_header);
1da177e4
LT		 773
774 skb = dev_alloc_skb(length);
7bfc4753 775 if (!skb)
1da177e4 776 return -ENOMEM;
1da177e4
LT		 777
778 skb->dev = slave->dev;
459a98ed 779 skb_reset_mac_header(skb);
b0e380b1 780 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 781 skb->protocol = PKT_TYPE_LACPDU;
782 skb->priority = TC_PRIO_CONTROL;
783
784 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
785
ada0f863 786 ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr);
b595076a 787 /* Note: source address is set to be the member's PERMANENT address,
3bf2d28a
VF		 788 * because we use it to identify loopback lacpdus in receive.
789 */
ada0f863 790 ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr);
e727149e 791 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4 792
3bf2d28a 793 lacpdu_header->lacpdu = port->lacpdu;
1da177e4
LT		 794
795 dev_queue_xmit(skb);
796
797 return 0;
798}
799
800/**
801 * ad_marker_send - send marker information/response on a given port
802 * @port: the port we're looking at
803 * @marker: marker data to send
804 *
805 * Returns: 0 on success
806 * < 0 on error
807 */
1c3f0b8e 808static int ad_marker_send(struct port *port, struct bond_marker *marker)
1da177e4
LT		 809{
810 struct slave *slave = port->slave;
811 struct sk_buff *skb;
1c3f0b8e
MD		 812 struct bond_marker_header *marker_header;
813 int length = sizeof(struct bond_marker_header);
1da177e4
LT		 814
815 skb = dev_alloc_skb(length + 16);
7bfc4753 816 if (!skb)
1da177e4 817 return -ENOMEM;
1da177e4
LT		 818
819 skb_reserve(skb, 16);
820
821 skb->dev = slave->dev;
459a98ed 822 skb_reset_mac_header(skb);
b0e380b1 823 skb->network_header = skb->mac_header + ETH_HLEN;
1da177e4
LT		 824 skb->protocol = PKT_TYPE_LACPDU;
825
1c3f0b8e 826 marker_header = (struct bond_marker_header *)skb_put(skb, length);
1da177e4 827
ada0f863 828 ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr);
b595076a 829 /* Note: source address is set to be the member's PERMANENT address,
3bf2d28a
VF		 830 * because we use it to identify loopback MARKERs in receive.
831 */
ada0f863 832 ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr);
e727149e 833 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
1da177e4 834
3bf2d28a 835 marker_header->marker = *marker;
1da177e4
LT		 836
837 dev_queue_xmit(skb);
838
839 return 0;
840}
841
842/**
843 * ad_mux_machine - handle a port's mux state machine
844 * @port: the port we're looking at
ee637714 845 * @update_slave_arr: Does slave array need update?
1da177e4 846 */
ee637714 847static void ad_mux_machine(struct port *port, bool *update_slave_arr)
1da177e4
LT		 848{
849 mux_states_t last_state;
850
3bf2d28a
VF		 851 /* keep current State Machine state to compare later if it was
852 * changed
853 */
1da177e4
LT		 854 last_state = port->sm_mux_state;
855
856 if (port->sm_vars & AD_PORT_BEGIN) {
3bf2d28a 857 port->sm_mux_state = AD_MUX_DETACHED;
1da177e4
LT		 858 } else {
859 switch (port->sm_mux_state) {
860 case AD_MUX_DETACHED:
7bfc4753
BD		 861 if ((port->sm_vars & AD_PORT_SELECTED)
862 || (port->sm_vars & AD_PORT_STANDBY))
863 /* if SELECTED or STANDBY */
3bf2d28a 864 port->sm_mux_state = AD_MUX_WAITING;
1da177e4
LT		 865 break;
866 case AD_MUX_WAITING:
3bf2d28a
VF		 867 /* if SELECTED == FALSE return to DETACH state */
868 if (!(port->sm_vars & AD_PORT_SELECTED)) {
1da177e4 869 port->sm_vars &= ~AD_PORT_READY_N;
3bf2d28a
VF		 870 /* in order to withhold the Selection Logic to
871 * check all ports READY_N value every callback
872 * cycle to update ready variable, we check
873 * READY_N and update READY here
874 */
1da177e4 875 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
3bf2d28a 876 port->sm_mux_state = AD_MUX_DETACHED;
1da177e4
LT		 877 break;
878 }
879
3bf2d28a 880 /* check if the wait_while_timer expired */
7bfc4753
BD		 881 if (port->sm_mux_timer_counter
882 && !(--port->sm_mux_timer_counter))
1da177e4 883 port->sm_vars |= AD_PORT_READY_N;
1da177e4 884
3bf2d28a
VF		 885 /* in order to withhold the selection logic to check
886 * all ports READY_N value every callback cycle to
887 * update ready variable, we check READY_N and update
888 * READY here
889 */
1da177e4
LT		 890 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
891
3bf2d28a
VF		 892 /* if the wait_while_timer expired, and the port is
893 * in READY state, move to ATTACHED state
894 */
7bfc4753
BD		 895 if ((port->sm_vars & AD_PORT_READY)
896 && !port->sm_mux_timer_counter)
3bf2d28a 897 port->sm_mux_state = AD_MUX_ATTACHED;
1da177e4
LT		 898 break;
899 case AD_MUX_ATTACHED:
3bf2d28a
VF		 900 /* check also if agg_select_timer expired (so the
901 * edable port will take place only after this timer)
902 */
903 if ((port->sm_vars & AD_PORT_SELECTED) &&
904 (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) &&
905 !__check_agg_selection_timer(port)) {
63b46242
WK		 906 if (port->aggregator->is_active)
907 port->sm_mux_state =
908 AD_MUX_COLLECTING_DISTRIBUTING;
3bf2d28a
VF		 909 } else if (!(port->sm_vars & AD_PORT_SELECTED) ||
910 (port->sm_vars & AD_PORT_STANDBY)) {
911 /* if UNSELECTED or STANDBY */
1da177e4 912 port->sm_vars &= ~AD_PORT_READY_N;
3bf2d28a
VF		 913 /* in order to withhold the selection logic to
914 * check all ports READY_N value every callback
915 * cycle to update ready variable, we check
916 * READY_N and update READY here
917 */
1da177e4 918 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
3bf2d28a 919 port->sm_mux_state = AD_MUX_DETACHED;
63b46242
WK		 920 } else if (port->aggregator->is_active) {
921 port->actor_oper_port_state |=
922 AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 923 }
924 break;
925 case AD_MUX_COLLECTING_DISTRIBUTING:
3bf2d28a
VF		 926 if (!(port->sm_vars & AD_PORT_SELECTED) ||
927 (port->sm_vars & AD_PORT_STANDBY) ||
63b46242
WK		 928 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) ||
929 !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) {
3bf2d28a 930 port->sm_mux_state = AD_MUX_ATTACHED;
1da177e4 931 } else {
3bf2d28a
VF		 932 /* if port state hasn't changed make
933 * sure that a collecting distributing
934 * port in an active aggregator is enabled
935 */
1da177e4
LT		 936 if (port->aggregator &&
937 port->aggregator->is_active &&
938 !__port_is_enabled(port)) {
939
940 __enable_port(port);
941 }
942 }
943 break;
3bf2d28a 944 default:
1da177e4
LT		 945 break;
946 }
947 }
948
3bf2d28a 949 /* check if the state machine was changed */
1da177e4 950 if (port->sm_mux_state != last_state) {
63b46242
WK		 951 pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
952 port->actor_port_number,
953 port->slave->dev->name,
954 last_state,
a4aee5c8 955 port->sm_mux_state);
1da177e4
LT		 956 switch (port->sm_mux_state) {
957 case AD_MUX_DETACHED:
1da177e4 958 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
ee637714
MB		 959 ad_disable_collecting_distributing(port,
960 update_slave_arr);
1da177e4
LT		 961 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
962 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
d238d458 963 port->ntt = true;
1da177e4
LT		 964 break;
965 case AD_MUX_WAITING:
966 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
967 break;
968 case AD_MUX_ATTACHED:
63b46242
WK		 969 if (port->aggregator->is_active)
970 port->actor_oper_port_state |=
971 AD_STATE_SYNCHRONIZATION;
972 else
973 port->actor_oper_port_state &=
974 ~AD_STATE_SYNCHRONIZATION;
1da177e4
LT		 975 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
976 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
ee637714
MB		 977 ad_disable_collecting_distributing(port,
978 update_slave_arr);
d238d458 979 port->ntt = true;
1da177e4
LT		 980 break;
981 case AD_MUX_COLLECTING_DISTRIBUTING:
982 port->actor_oper_port_state |= AD_STATE_COLLECTING;
983 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
63b46242 984 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
ee637714
MB		 985 ad_enable_collecting_distributing(port,
986 update_slave_arr);
d238d458 987 port->ntt = true;
1da177e4 988 break;
3bf2d28a 989 default:
1da177e4
LT		 990 break;
991 }
992 }
993}
994
995/**
996 * ad_rx_machine - handle a port's rx State Machine
997 * @lacpdu: the lacpdu we've received
998 * @port: the port we're looking at
999 *
1000 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1001 * CURRENT. If timer expired set the state machine in the proper state.
1002 * In other cases, this function checks if we need to switch to other state.
1003 */
1004static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1005{
1006 rx_states_t last_state;
1007
3bf2d28a
VF		 1008 /* keep current State Machine state to compare later if it was
1009 * changed
1010 */
1da177e4
LT		 1011 last_state = port->sm_rx_state;
1012
3bf2d28a
VF		 1013 /* check if state machine should change state */
1014
1015 /* first, check if port was reinitialized */
7bfc4753 1016 if (port->sm_vars & AD_PORT_BEGIN)
7bfc4753 1017 port->sm_rx_state = AD_RX_INITIALIZE;
3bf2d28a 1018 /* check if port is not enabled */
7bfc4753
BD		 1019 else if (!(port->sm_vars & AD_PORT_BEGIN)
1020 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
7bfc4753 1021 port->sm_rx_state = AD_RX_PORT_DISABLED;
3bf2d28a
VF		 1022 /* check if new lacpdu arrived */
1023 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) ||
1024 (port->sm_rx_state == AD_RX_DEFAULTED) ||
1025 (port->sm_rx_state == AD_RX_CURRENT))) {
1026 port->sm_rx_timer_counter = 0;
1da177e4
LT		 1027 port->sm_rx_state = AD_RX_CURRENT;
1028 } else {
3bf2d28a
VF		 1029 /* if timer is on, and if it is expired */
1030 if (port->sm_rx_timer_counter &&
1031 !(--port->sm_rx_timer_counter)) {
1da177e4
LT		 1032 switch (port->sm_rx_state) {
1033 case AD_RX_EXPIRED:
3bf2d28a 1034 port->sm_rx_state = AD_RX_DEFAULTED;
1da177e4
LT		 1035 break;
1036 case AD_RX_CURRENT:
3bf2d28a 1037 port->sm_rx_state = AD_RX_EXPIRED;
1da177e4 1038 break;
3bf2d28a 1039 default:
1da177e4
LT		 1040 break;
1041 }
1042 } else {
3bf2d28a 1043 /* if no lacpdu arrived and no timer is on */
1da177e4
LT		 1044 switch (port->sm_rx_state) {
1045 case AD_RX_PORT_DISABLED:
7bfc4753 1046 if (port->sm_vars & AD_PORT_MOVED)
3bf2d28a 1047 port->sm_rx_state = AD_RX_INITIALIZE;
7bfc4753
BD		 1048 else if (port->is_enabled
1049 && (port->sm_vars
1050 & AD_PORT_LACP_ENABLED))
3bf2d28a 1051 port->sm_rx_state = AD_RX_EXPIRED;
7bfc4753
BD		 1052 else if (port->is_enabled
1053 && ((port->sm_vars
1054 & AD_PORT_LACP_ENABLED) == 0))
3bf2d28a 1055 port->sm_rx_state = AD_RX_LACP_DISABLED;
1da177e4 1056 break;
3bf2d28a 1057 default:
1da177e4
LT		 1058 break;
1059
1060 }
1061 }
1062 }
1063
3bf2d28a 1064 /* check if the State machine was changed or new lacpdu arrived */
1da177e4 1065 if ((port->sm_rx_state != last_state) || (lacpdu)) {
63b46242
WK		 1066 pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n",
1067 port->actor_port_number,
1068 port->slave->dev->name,
1069 last_state,
a4aee5c8 1070 port->sm_rx_state);
1da177e4
LT		 1071 switch (port->sm_rx_state) {
1072 case AD_RX_INITIALIZE:
cb8dda90 1073 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1da177e4 1074 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
7bfc4753 1075 else
1da177e4 1076 port->sm_vars |= AD_PORT_LACP_ENABLED;
1da177e4
LT		 1077 port->sm_vars &= ~AD_PORT_SELECTED;
1078 __record_default(port);
1079 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1080 port->sm_vars &= ~AD_PORT_MOVED;
3bf2d28a 1081 port->sm_rx_state = AD_RX_PORT_DISABLED;
1da177e4 1082
3bf2d28a 1083 /* Fall Through */
1da177e4
LT		 1084 case AD_RX_PORT_DISABLED:
1085 port->sm_vars &= ~AD_PORT_MATCHED;
1086 break;
1087 case AD_RX_LACP_DISABLED:
1088 port->sm_vars &= ~AD_PORT_SELECTED;
1089 __record_default(port);
1055c9ab 1090 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
1da177e4
LT		 1091 port->sm_vars |= AD_PORT_MATCHED;
1092 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1093 break;
1094 case AD_RX_EXPIRED:
3bf2d28a
VF		 1095 /* Reset of the Synchronization flag (Standard 43.4.12)
1096 * This reset cause to disable this port in the
1097 * COLLECTING_DISTRIBUTING state of the mux machine in
1098 * case of EXPIRED even if LINK_DOWN didn't arrive for
1099 * the port.
1100 */
1055c9ab 1101 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
1da177e4 1102 port->sm_vars &= ~AD_PORT_MATCHED;
3bf2d28a 1103 port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY;
1da177e4
LT		 1104 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1105 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1106 break;
1107 case AD_RX_DEFAULTED:
1108 __update_default_selected(port);
1109 __record_default(port);
1110 port->sm_vars |= AD_PORT_MATCHED;
1111 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1112 break;
1113 case AD_RX_CURRENT:
815117ad 1114 /* detect loopback situation */
3bf2d28a
VF		 1115 if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system),
1116 &(port->actor_system))) {
d4471f5e 1117 netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n"
90194264 1118 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
3bf2d28a 1119 port->slave->dev->name);
1da177e4
LT		 1120 return;
1121 }
1122 __update_selected(lacpdu, port);
1123 __update_ntt(lacpdu, port);
1124 __record_pdu(lacpdu, port);
1da177e4
LT		 1125 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1126 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1da177e4 1127 break;
3bf2d28a 1128 default:
1da177e4
LT		 1129 break;
1130 }
1131 }
1da177e4
LT		 1132}
1133
1134/**
1135 * ad_tx_machine - handle a port's tx state machine
1136 * @port: the port we're looking at
1da177e4
LT		 1137 */
1138static void ad_tx_machine(struct port *port)
1139{
3bf2d28a
VF		 1140 /* check if tx timer expired, to verify that we do not send more than
1141 * 3 packets per second
1142 */
1da177e4 1143 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
3bf2d28a 1144 /* check if there is something to send */
1da177e4
LT		 1145 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1146 __update_lacpdu_from_port(port);
d238d458 1147
1da177e4 1148 if (ad_lacpdu_send(port) >= 0) {
a4aee5c8
JP		 1149 pr_debug("Sent LACPDU on port %d\n",
1150 port->actor_port_number);
d238d458 1151
3bf2d28a
VF		 1152 /* mark ntt as false, so it will not be sent
1153 * again until demanded
1154 */
d238d458 1155 port->ntt = false;
1da177e4
LT		 1156 }
1157 }
3bf2d28a
VF		 1158 /* restart tx timer(to verify that we will not exceed
1159 * AD_MAX_TX_IN_SECOND
1160 */
1161 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1da177e4
LT		 1162 }
1163}
1164
1165/**
1166 * ad_periodic_machine - handle a port's periodic state machine
1167 * @port: the port we're looking at
1168 *
1169 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1170 */
1171static void ad_periodic_machine(struct port *port)
1172{
1173 periodic_states_t last_state;
1174
3bf2d28a 1175 /* keep current state machine state to compare later if it was changed */
1da177e4
LT		 1176 last_state = port->sm_periodic_state;
1177
3bf2d28a 1178 /* check if port was reinitialized */
1da177e4 1179 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
1055c9ab 1180 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
1da177e4 1181 ) {
3bf2d28a 1182 port->sm_periodic_state = AD_NO_PERIODIC;
1da177e4 1183 }
3bf2d28a 1184 /* check if state machine should change state */
1da177e4 1185 else if (port->sm_periodic_timer_counter) {
3bf2d28a 1186 /* check if periodic state machine expired */
1da177e4 1187 if (!(--port->sm_periodic_timer_counter)) {
3bf2d28a
VF		 1188 /* if expired then do tx */
1189 port->sm_periodic_state = AD_PERIODIC_TX;
1da177e4 1190 } else {
3bf2d28a
VF		 1191 /* If not expired, check if there is some new timeout
1192 * parameter from the partner state
1193 */
1da177e4
LT		 1194 switch (port->sm_periodic_state) {
1195 case AD_FAST_PERIODIC:
7bfc4753
BD		 1196 if (!(port->partner_oper.port_state
1197 & AD_STATE_LACP_TIMEOUT))
3bf2d28a 1198 port->sm_periodic_state = AD_SLOW_PERIODIC;
1da177e4
LT		 1199 break;
1200 case AD_SLOW_PERIODIC:
1055c9ab 1201 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
1da177e4 1202 port->sm_periodic_timer_counter = 0;
3bf2d28a 1203 port->sm_periodic_state = AD_PERIODIC_TX;
1da177e4
LT		 1204 }
1205 break;
3bf2d28a 1206 default:
1da177e4
LT		 1207 break;
1208 }
1209 }
1210 } else {
1211 switch (port->sm_periodic_state) {
1212 case AD_NO_PERIODIC:
3bf2d28a 1213 port->sm_periodic_state = AD_FAST_PERIODIC;
1da177e4
LT		 1214 break;
1215 case AD_PERIODIC_TX:
3bf2d28a
VF		 1216 if (!(port->partner_oper.port_state &
1217 AD_STATE_LACP_TIMEOUT))
1218 port->sm_periodic_state = AD_SLOW_PERIODIC;
7bfc4753 1219 else
3bf2d28a 1220 port->sm_periodic_state = AD_FAST_PERIODIC;
1da177e4 1221 break;
3bf2d28a 1222 default:
1da177e4
LT		 1223 break;
1224 }
1225 }
1226
3bf2d28a 1227 /* check if the state machine was changed */
1da177e4 1228 if (port->sm_periodic_state != last_state) {
a4aee5c8
JP		 1229 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1230 port->actor_port_number, last_state,
1231 port->sm_periodic_state);
1da177e4
LT		 1232 switch (port->sm_periodic_state) {
1233 case AD_NO_PERIODIC:
3bf2d28a 1234 port->sm_periodic_timer_counter = 0;
1da177e4
LT		 1235 break;
1236 case AD_FAST_PERIODIC:
3bf2d28a
VF		 1237 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1238 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1;
1da177e4
LT		 1239 break;
1240 case AD_SLOW_PERIODIC:
3bf2d28a
VF		 1241 /* decrement 1 tick we lost in the PERIODIC_TX cycle */
1242 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1;
1da177e4
LT		 1243 break;
1244 case AD_PERIODIC_TX:
d238d458 1245 port->ntt = true;
1da177e4 1246 break;
3bf2d28a 1247 default:
1da177e4
LT		 1248 break;
1249 }
1250 }
1251}
1252
1253/**
1254 * ad_port_selection_logic - select aggregation groups
1255 * @port: the port we're looking at
ee637714 1256 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1257 *
1258 * Select aggregation groups, and assign each port for it's aggregetor. The
1259 * selection logic is called in the inititalization (after all the handshkes),
1260 * and after every lacpdu receive (if selected is off).
1261 */
ee637714 1262static void ad_port_selection_logic(struct port *port, bool *update_slave_arr)
1da177e4
LT		 1263{
1264 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1265 struct port *last_port = NULL, *curr_port;
3e36bb75
VF		 1266 struct list_head *iter;
1267 struct bonding *bond;
1268 struct slave *slave;
1da177e4
LT		 1269 int found = 0;
1270
3bf2d28a 1271 /* if the port is already Selected, do nothing */
7bfc4753 1272 if (port->sm_vars & AD_PORT_SELECTED)
1da177e4 1273 return;
1da177e4 1274
3e36bb75
VF		 1275 bond = __get_bond_by_port(port);
1276
3bf2d28a 1277 /* if the port is connected to other aggregator, detach it */
1da177e4 1278 if (port->aggregator) {
3bf2d28a 1279 /* detach the port from its former aggregator */
128ea6c3
BD		 1280 temp_aggregator = port->aggregator;
1281 for (curr_port = temp_aggregator->lag_ports; curr_port;
1282 last_port = curr_port,
3bf2d28a 1283 curr_port = curr_port->next_port_in_aggregator) {
1da177e4
LT		 1284 if (curr_port == port) {
1285 temp_aggregator->num_of_ports--;
3bf2d28a
VF		 1286 /* if it is the first port attached to the
1287 * aggregator
1288 */
1289 if (!last_port) {
128ea6c3
BD		 1290 temp_aggregator->lag_ports =
1291 port->next_port_in_aggregator;
3bf2d28a
VF		 1292 } else {
1293 /* not the first port attached to the
1294 * aggregator
1295 */
128ea6c3
BD		 1296 last_port->next_port_in_aggregator =
1297 port->next_port_in_aggregator;
1da177e4
LT		 1298 }
1299
3bf2d28a
VF		 1300 /* clear the port's relations to this
1301 * aggregator
1302 */
1da177e4 1303 port->aggregator = NULL;
128ea6c3
BD		 1304 port->next_port_in_aggregator = NULL;
1305 port->actor_port_aggregator_identifier = 0;
1da177e4 1306
d4471f5e
VF		 1307 netdev_dbg(bond->dev, "Port %d left LAG %d\n",
1308 port->actor_port_number,
1309 temp_aggregator->aggregator_identifier);
3bf2d28a
VF		 1310 /* if the aggregator is empty, clear its
1311 * parameters, and set it ready to be attached
1312 */
7bfc4753 1313 if (!temp_aggregator->lag_ports)
1da177e4 1314 ad_clear_agg(temp_aggregator);
1da177e4
LT		 1315 break;
1316 }
1317 }
3bf2d28a
VF		 1318 if (!curr_port) {
1319 /* meaning: the port was related to an aggregator
1320 * but was not on the aggregator port list
1321 */
d4471f5e
VF		 1322 net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
1323 port->slave->bond->dev->name,
1324 port->actor_port_number,
1325 port->slave->dev->name,
1326 port->aggregator->aggregator_identifier);
1da177e4
LT		 1327 }
1328 }
3bf2d28a 1329 /* search on all aggregators for a suitable aggregator for this port */
3e36bb75 1330 bond_for_each_slave(bond, slave, iter) {
3fdddd85 1331 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4 1332
3bf2d28a 1333 /* keep a free aggregator for later use(if needed) */
1da177e4 1334 if (!aggregator->lag_ports) {
7bfc4753 1335 if (!free_aggregator)
128ea6c3 1336 free_aggregator = aggregator;
1da177e4
LT		 1337 continue;
1338 }
815117ad 1339 /* check if current aggregator suits us */
1340 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */
1341 MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1055c9ab
HE		 1342 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1343 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
1da177e4 1344 ) &&
815117ad 1345 ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */
1346 !aggregator->is_individual) /* but is not individual OR */
1da177e4
LT		 1347 )
1348 ) {
815117ad 1349 /* attach to the founded aggregator */
1da177e4 1350 port->aggregator = aggregator;
128ea6c3
BD		 1351 port->actor_port_aggregator_identifier =
1352 port->aggregator->aggregator_identifier;
1353 port->next_port_in_aggregator = aggregator->lag_ports;
1da177e4 1354 port->aggregator->num_of_ports++;
128ea6c3 1355 aggregator->lag_ports = port;
d4471f5e
VF		 1356 netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n",
1357 port->actor_port_number,
1358 port->aggregator->aggregator_identifier);
1da177e4 1359
3bf2d28a 1360 /* mark this port as selected */
1da177e4
LT		 1361 port->sm_vars |= AD_PORT_SELECTED;
1362 found = 1;
1363 break;
1364 }
1365 }
1366
3bf2d28a
VF		 1367 /* the port couldn't find an aggregator - attach it to a new
1368 * aggregator
1369 */
1da177e4
LT		 1370 if (!found) {
1371 if (free_aggregator) {
3bf2d28a 1372 /* assign port a new aggregator */
1da177e4 1373 port->aggregator = free_aggregator;
128ea6c3
BD		 1374 port->actor_port_aggregator_identifier =
1375 port->aggregator->aggregator_identifier;
1da177e4 1376
3bf2d28a
VF		 1377 /* update the new aggregator's parameters
1378 * if port was responsed from the end-user
1379 */
cb8dda90 1380 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
7bfc4753 1381 /* if port is full duplex */
1624db7b 1382 port->aggregator->is_individual = false;
7bfc4753 1383 else
1624db7b 1384 port->aggregator->is_individual = true;
1da177e4
LT		 1385
1386 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1387 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
128ea6c3
BD		 1388 port->aggregator->partner_system =
1389 port->partner_oper.system;
1390 port->aggregator->partner_system_priority =
1391 port->partner_oper.system_priority;
1055c9ab 1392 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
1da177e4
LT		 1393 port->aggregator->receive_state = 1;
1394 port->aggregator->transmit_state = 1;
1395 port->aggregator->lag_ports = port;
1396 port->aggregator->num_of_ports++;
1397
3bf2d28a 1398 /* mark this port as selected */
1da177e4
LT		 1399 port->sm_vars |= AD_PORT_SELECTED;
1400
d4471f5e
VF		 1401 netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n",
1402 port->actor_port_number,
1403 port->aggregator->aggregator_identifier);
1da177e4 1404 } else {
d4471f5e 1405 netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n",
1da177e4
LT		 1406 port->actor_port_number, port->slave->dev->name);
1407 }
1408 }
3bf2d28a
VF		 1409 /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE
1410 * in all aggregator's ports, else set ready=FALSE in all
1411 * aggregator's ports
1412 */
1413 __set_agg_ports_ready(port->aggregator,
1414 __agg_ports_are_ready(port->aggregator));
1da177e4 1415
fd989c83 1416 aggregator = __get_first_agg(port);
ee637714 1417 ad_agg_selection_logic(aggregator, update_slave_arr);
63b46242
WK		 1418
1419 if (!port->aggregator->is_active)
1420 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
fd989c83
JV		 1421}
1422
3bf2d28a 1423/* Decide if "agg" is a better choice for the new active aggregator that
fd989c83
JV		 1424 * the current best, according to the ad_select policy.
1425 */
1426static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1427 struct aggregator *curr)
1428{
3bf2d28a 1429 /* 0. If no best, select current.
fd989c83
JV		 1430 *
1431 * 1. If the current agg is not individual, and the best is
1432 * individual, select current.
1433 *
1434 * 2. If current agg is individual and the best is not, keep best.
1435 *
1436 * 3. Therefore, current and best are both individual or both not
1437 * individual, so:
1438 *
1439 * 3a. If current agg partner replied, and best agg partner did not,
1440 * select current.
1441 *
1442 * 3b. If current agg partner did not reply and best agg partner
1443 * did reply, keep best.
1444 *
1445 * 4. Therefore, current and best both have partner replies or
1446 * both do not, so perform selection policy:
1447 *
1448 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1449 * select by bandwidth.
1450 *
1451 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1452 */
1453 if (!best)
1454 return curr;
1455
1456 if (!curr->is_individual && best->is_individual)
1457 return curr;
1458
1459 if (curr->is_individual && !best->is_individual)
1460 return best;
1461
1462 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1463 return curr;
1464
1465 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1466 return best;
1467
1468 switch (__get_agg_selection_mode(curr->lag_ports)) {
1469 case BOND_AD_COUNT:
1470 if (curr->num_of_ports > best->num_of_ports)
1471 return curr;
1472
1473 if (curr->num_of_ports < best->num_of_ports)
1474 return best;
1475
1476 /*FALLTHROUGH*/
1477 case BOND_AD_STABLE:
1478 case BOND_AD_BANDWIDTH:
1479 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1480 return curr;
1481
1482 break;
1483
1484 default:
d4471f5e
VF		 1485 net_warn_ratelimited("%s: Impossible agg select mode %d\n",
1486 curr->slave->bond->dev->name,
1487 __get_agg_selection_mode(curr->lag_ports));
fd989c83 1488 break;
1da177e4 1489 }
fd989c83
JV		 1490
1491 return best;
1da177e4
LT		 1492}
1493
4cd6fe1c
SH		 1494static int agg_device_up(const struct aggregator *agg)
1495{
2430af8b 1496 struct port *port = agg->lag_ports;
3bf2d28a 1497
2430af8b
JB		 1498 if (!port)
1499 return 0;
3bf2d28a
VF		 1500
1501 return netif_running(port->slave->dev) &&
1502 netif_carrier_ok(port->slave->dev);
4cd6fe1c
SH		 1503}
1504
1da177e4
LT		 1505/**
1506 * ad_agg_selection_logic - select an aggregation group for a team
1507 * @aggregator: the aggregator we're looking at
ee637714 1508 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1509 *
1510 * It is assumed that only one aggregator may be selected for a team.
fd989c83
JV		 1511 *
1512 * The logic of this function is to select the aggregator according to
1513 * the ad_select policy:
1514 *
1515 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1516 * it, and to reselect the active aggregator only if the previous
1517 * aggregator has no more ports related to it.
1518 *
1519 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1520 * bandwidth, and reselect whenever a link state change takes place or the
1521 * set of slaves in the bond changes.
1522 *
1523 * BOND_AD_COUNT: select the aggregator with largest number of ports
1524 * (slaves), and reselect whenever a link state change takes place or the
1525 * set of slaves in the bond changes.
1da177e4
LT		 1526 *
1527 * FIXME: this function MUST be called with the first agg in the bond, or
1528 * __get_active_agg() won't work correctly. This function should be better
1529 * called with the bond itself, and retrieve the first agg from it.
1530 */
ee637714
MB		 1531static void ad_agg_selection_logic(struct aggregator *agg,
1532 bool *update_slave_arr)
1da177e4 1533{
fd989c83 1534 struct aggregator *best, *active, *origin;
bef1fcce
VF		 1535 struct bonding *bond = agg->slave->bond;
1536 struct list_head *iter;
1537 struct slave *slave;
1da177e4 1538 struct port *port;
1da177e4 1539
49b7624e 1540 rcu_read_lock();
fd989c83 1541 origin = agg;
fd989c83 1542 active = __get_active_agg(agg);
4cd6fe1c 1543 best = (active && agg_device_up(active)) ? active : NULL;
1da177e4 1544
be79bd04 1545 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 1546 agg = &(SLAVE_AD_INFO(slave)->aggregator);
bef1fcce 1547
fd989c83
JV		 1548 agg->is_active = 0;
1549
4cd6fe1c 1550 if (agg->num_of_ports && agg_device_up(agg))
fd989c83 1551 best = ad_agg_selection_test(best, agg);
bef1fcce 1552 }
fd989c83
JV		 1553
1554 if (best &&
1555 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
3bf2d28a 1556 /* For the STABLE policy, don't replace the old active
fd989c83
JV		 1557 * aggregator if it's still active (it has an answering
1558 * partner) or if both the best and active don't have an
1559 * answering partner.
1560 */
1561 if (active && active->lag_ports &&
1562 active->lag_ports->is_enabled &&
1563 (__agg_has_partner(active) ||
3bf2d28a
VF		 1564 (!__agg_has_partner(active) &&
1565 !__agg_has_partner(best)))) {
fd989c83
JV		 1566 if (!(!active->actor_oper_aggregator_key &&
1567 best->actor_oper_aggregator_key)) {
1568 best = NULL;
1569 active->is_active = 1;
1da177e4
LT		 1570 }
1571 }
fd989c83 1572 }
1da177e4 1573
fd989c83
JV		 1574 if (best && (best == active)) {
1575 best = NULL;
1576 active->is_active = 1;
1da177e4
LT		 1577 }
1578
be79bd04 1579 /* if there is new best aggregator, activate it */
fd989c83 1580 if (best) {
d4471f5e
VF		 1581 netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1582 best->aggregator_identifier, best->num_of_ports,
1583 best->actor_oper_aggregator_key,
1584 best->partner_oper_aggregator_key,
1585 best->is_individual, best->is_active);
1586 netdev_dbg(bond->dev, "best ports %p slave %p %s\n",
1587 best->lag_ports, best->slave,
1588 best->slave ? best->slave->dev->name : "NULL");
fd989c83 1589
be79bd04 1590 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 1591 agg = &(SLAVE_AD_INFO(slave)->aggregator);
fd989c83 1592
d4471f5e
VF		 1593 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1594 agg->aggregator_identifier, agg->num_of_ports,
1595 agg->actor_oper_aggregator_key,
1596 agg->partner_oper_aggregator_key,
1597 agg->is_individual, agg->is_active);
1da177e4
LT		 1598 }
1599
be79bd04 1600 /* check if any partner replys */
fd989c83 1601 if (best->is_individual) {
d4471f5e
VF		 1602 net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
1603 best->slave ?
1604 best->slave->bond->dev->name : "NULL");
1da177e4
LT		 1605 }
1606
fd989c83 1607 best->is_active = 1;
d4471f5e
VF		 1608 netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n",
1609 best->aggregator_identifier);
1610 netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
1611 best->aggregator_identifier, best->num_of_ports,
1612 best->actor_oper_aggregator_key,
1613 best->partner_oper_aggregator_key,
1614 best->is_individual, best->is_active);
1da177e4 1615
3bf2d28a
VF		 1616 /* disable the ports that were related to the former
1617 * active_aggregator
1618 */
fd989c83
JV		 1619 if (active) {
1620 for (port = active->lag_ports; port;
1621 port = port->next_port_in_aggregator) {
1da177e4
LT		 1622 __disable_port(port);
1623 }
1624 }
ee637714
MB		 1625 /* Slave array needs update. */
1626 *update_slave_arr = true;
1da177e4
LT		 1627 }
1628
3bf2d28a 1629 /* if the selected aggregator is of join individuals
fd989c83
JV		 1630 * (partner_system is NULL), enable their ports
1631 */
1632 active = __get_active_agg(origin);
1da177e4 1633
fd989c83
JV		 1634 if (active) {
1635 if (!__agg_has_partner(active)) {
1636 for (port = active->lag_ports; port;
1637 port = port->next_port_in_aggregator) {
1da177e4
LT		 1638 __enable_port(port);
1639 }
1640 }
1641 }
fd989c83 1642
be79bd04 1643 rcu_read_unlock();
1644
bef1fcce 1645 bond_3ad_set_carrier(bond);
1da177e4
LT		 1646}
1647
1648/**
1649 * ad_clear_agg - clear a given aggregator's parameters
1650 * @aggregator: the aggregator we're looking at
1da177e4
LT		 1651 */
1652static void ad_clear_agg(struct aggregator *aggregator)
1653{
1654 if (aggregator) {
1624db7b 1655 aggregator->is_individual = false;
1da177e4
LT		 1656 aggregator->actor_admin_aggregator_key = 0;
1657 aggregator->actor_oper_aggregator_key = 0;
1658 aggregator->partner_system = null_mac_addr;
1659 aggregator->partner_system_priority = 0;
1660 aggregator->partner_oper_aggregator_key = 0;
1661 aggregator->receive_state = 0;
1662 aggregator->transmit_state = 0;
1663 aggregator->lag_ports = NULL;
1664 aggregator->is_active = 0;
1665 aggregator->num_of_ports = 0;
a4aee5c8
JP		 1666 pr_debug("LAG %d was cleared\n",
1667 aggregator->aggregator_identifier);
1da177e4
LT		 1668 }
1669}
1670
1671/**
1672 * ad_initialize_agg - initialize a given aggregator's parameters
1673 * @aggregator: the aggregator we're looking at
1da177e4
LT		 1674 */
1675static void ad_initialize_agg(struct aggregator *aggregator)
1676{
1677 if (aggregator) {
1678 ad_clear_agg(aggregator);
1679
1680 aggregator->aggregator_mac_address = null_mac_addr;
1681 aggregator->aggregator_identifier = 0;
1682 aggregator->slave = NULL;
1683 }
1684}
1685
1686/**
1687 * ad_initialize_port - initialize a given port's parameters
1688 * @aggregator: the aggregator we're looking at
1689 * @lacp_fast: boolean. whether fast periodic should be used
1da177e4
LT		 1690 */
1691static void ad_initialize_port(struct port *port, int lacp_fast)
1692{
c7e703d0
HE		 1693 static const struct port_params tmpl = {
1694 .system_priority = 0xffff,
1695 .key = 1,
1696 .port_number = 1,
1697 .port_priority = 0xff,
1698 .port_state = 1,
1699 };
7addeef6
HE		 1700 static const struct lacpdu lacpdu = {
1701 .subtype = 0x01,
1702 .version_number = 0x01,
1703 .tlv_type_actor_info = 0x01,
1704 .actor_information_length = 0x14,
1705 .tlv_type_partner_info = 0x02,
1706 .partner_information_length = 0x14,
1707 .tlv_type_collector_info = 0x03,
1708 .collector_information_length = 0x10,
1709 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1710 };
c7e703d0 1711
1da177e4
LT		 1712 if (port) {
1713 port->actor_port_number = 1;
1714 port->actor_port_priority = 0xff;
1715 port->actor_system = null_mac_addr;
1716 port->actor_system_priority = 0xffff;
1717 port->actor_port_aggregator_identifier = 0;
d238d458 1718 port->ntt = false;
1da177e4
LT		 1719 port->actor_admin_port_key = 1;
1720 port->actor_oper_port_key = 1;
3bf2d28a
VF		 1721 port->actor_admin_port_state = AD_STATE_AGGREGATION |
1722 AD_STATE_LACP_ACTIVITY;
1723 port->actor_oper_port_state = AD_STATE_AGGREGATION |
1724 AD_STATE_LACP_ACTIVITY;
1da177e4 1725
7bfc4753 1726 if (lacp_fast)
1da177e4 1727 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
1da177e4 1728
c7e703d0
HE		 1729 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1730 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1731
f48127b6 1732 port->is_enabled = true;
3bf2d28a 1733 /* private parameters */
1da177e4
LT		 1734 port->sm_vars = 0x3;
1735 port->sm_rx_state = 0;
1736 port->sm_rx_timer_counter = 0;
1737 port->sm_periodic_state = 0;
1738 port->sm_periodic_timer_counter = 0;
1739 port->sm_mux_state = 0;
1740 port->sm_mux_timer_counter = 0;
1741 port->sm_tx_state = 0;
1742 port->sm_tx_timer_counter = 0;
1743 port->slave = NULL;
1744 port->aggregator = NULL;
1745 port->next_port_in_aggregator = NULL;
1746 port->transaction_id = 0;
1747
7addeef6 1748 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
1da177e4
LT		 1749 }
1750}
1751
1752/**
1753 * ad_enable_collecting_distributing - enable a port's transmit/receive
1754 * @port: the port we're looking at
ee637714 1755 * @update_slave_arr: Does slave array need update?
1da177e4
LT		 1756 *
1757 * Enable @port if it's in an active aggregator
1758 */
ee637714
MB		 1759static void ad_enable_collecting_distributing(struct port *port,
1760 bool *update_slave_arr)
1da177e4
LT		 1761{
1762 if (port->aggregator->is_active) {
a4aee5c8
JP		 1763 pr_debug("Enabling port %d(LAG %d)\n",
1764 port->actor_port_number,
1765 port->aggregator->aggregator_identifier);
1da177e4 1766 __enable_port(port);
ee637714
MB		 1767 /* Slave array needs update */
1768 *update_slave_arr = true;
1da177e4
LT		 1769 }
1770}
1771
1772/**
1773 * ad_disable_collecting_distributing - disable a port's transmit/receive
1774 * @port: the port we're looking at
ee637714 1775 * @update_slave_arr: Does slave array need update?
1da177e4 1776 */
ee637714
MB		 1777static void ad_disable_collecting_distributing(struct port *port,
1778 bool *update_slave_arr)
1da177e4 1779{
3bf2d28a
VF		 1780 if (port->aggregator &&
1781 !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system),
1782 &(null_mac_addr))) {
a4aee5c8
JP		 1783 pr_debug("Disabling port %d(LAG %d)\n",
1784 port->actor_port_number,
1785 port->aggregator->aggregator_identifier);
1da177e4 1786 __disable_port(port);
ee637714
MB		 1787 /* Slave array needs an update */
1788 *update_slave_arr = true;
1da177e4
LT		 1789 }
1790}
1791
1da177e4
LT		 1792/**
1793 * ad_marker_info_received - handle receive of a Marker information frame
1794 * @marker_info: Marker info received
1795 * @port: the port we're looking at
1da177e4 1796 */
1c3f0b8e
MD		 1797static void ad_marker_info_received(struct bond_marker *marker_info,
1798 struct port *port)
1da177e4 1799{
1c3f0b8e 1800 struct bond_marker marker;
1da177e4 1801
3bf2d28a 1802 /* copy the received marker data to the response marker */
1c3f0b8e 1803 memcpy(&marker, marker_info, sizeof(struct bond_marker));
3bf2d28a 1804 /* change the marker subtype to marker response */
128ea6c3 1805 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
1da177e4 1806
3bf2d28a 1807 /* send the marker response */
1da177e4 1808 if (ad_marker_send(port, &marker) >= 0) {
a4aee5c8
JP		 1809 pr_debug("Sent Marker Response on port %d\n",
1810 port->actor_port_number);
1da177e4
LT		 1811 }
1812}
1813
1814/**
1815 * ad_marker_response_received - handle receive of a marker response frame
1816 * @marker: marker PDU received
1817 * @port: the port we're looking at
1818 *
1819 * This function does nothing since we decided not to implement send and handle
1820 * response for marker PDU's, in this stage, but only to respond to marker
1821 * information.
1822 */
1c3f0b8e 1823static void ad_marker_response_received(struct bond_marker *marker,
3bf2d28a 1824 struct port *port)
1da177e4 1825{
3bf2d28a
VF		 1826 marker = NULL;
1827 port = NULL;
1828 /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */
1da177e4
LT		 1829}
1830
3bf2d28a 1831/* ========= AD exported functions to the main bonding code ========= */
1da177e4 1832
3bf2d28a 1833/* Check aggregators status in team every T seconds */
1da177e4
LT		 1834#define AD_AGGREGATOR_SELECTION_TIMER 8
1835
3bf2d28a
VF		 1836/**
1837 * bond_3ad_initiate_agg_selection - initate aggregator selection
1838 * @bond: bonding struct
fd989c83
JV		 1839 *
1840 * Set the aggregation selection timer, to initiate an agg selection in
1841 * the very near future. Called during first initialization, and during
1842 * any down to up transitions of the bond.
1843 */
1844void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1845{
1846 BOND_AD_INFO(bond).agg_select_timer = timeout;
fd989c83
JV		 1847}
1848
1da177e4
LT		 1849/**
1850 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1851 * @bond: bonding struct to work on
1852 * @tick_resolution: tick duration (millisecond resolution)
1da177e4
LT		 1853 *
1854 * Can be called only after the mac address of the bond is set.
1855 */
56d00c67 1856void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution)
3a6d54c5 1857{
815117ad 1858 /* check that the bond is not initialized yet */
1859 if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr),
3a6d54c5 1860 bond->dev->dev_addr)) {
1da177e4 1861
163c8ff3 1862 BOND_AD_INFO(bond).aggregator_identifier = 0;
1da177e4 1863
1da177e4
LT		 1864 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1865 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1866
3bf2d28a
VF		 1867 /* initialize how many times this module is called in one
1868 * second (should be about every 100ms)
1869 */
1da177e4
LT		 1870 ad_ticks_per_sec = tick_resolution;
1871
fd989c83
JV		 1872 bond_3ad_initiate_agg_selection(bond,
1873 AD_AGGREGATOR_SELECTION_TIMER *
1874 ad_ticks_per_sec);
1da177e4
LT		 1875 }
1876}
1877
1878/**
1879 * bond_3ad_bind_slave - initialize a slave's port
1880 * @slave: slave struct to work on
1881 *
1882 * Returns: 0 on success
1883 * < 0 on error
1884 */
359632e5 1885void bond_3ad_bind_slave(struct slave *slave)
1da177e4
LT		 1886{
1887 struct bonding *bond = bond_get_bond_by_slave(slave);
1888 struct port *port;
1889 struct aggregator *aggregator;
1890
359632e5 1891 /* check that the slave has not been initialized yet. */
3fdddd85 1892 if (SLAVE_AD_INFO(slave)->port.slave != slave) {
1da177e4 1893
359632e5 1894 /* port initialization */
3fdddd85 1895 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 1896
bf0239a9 1897 ad_initialize_port(port, bond->params.lacp_fast);
1da177e4
LT		 1898
1899 port->slave = slave;
3fdddd85 1900 port->actor_port_number = SLAVE_AD_INFO(slave)->id;
359632e5 1901 /* key is determined according to the link speed, duplex and user key(which
1902 * is yet not supported)
359632e5 1903 */
3bf2d28a 1904 port->actor_admin_port_key = 0;
1da177e4
LT		 1905 port->actor_admin_port_key |= __get_duplex(port);
1906 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1907 port->actor_oper_port_key = port->actor_admin_port_key;
3bf2d28a
VF		 1908 /* if the port is not full duplex, then the port should be not
1909 * lacp Enabled
1910 */
cb8dda90 1911 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS))
1da177e4 1912 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
359632e5 1913 /* actor system is the bond's system */
1da177e4 1914 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
3bf2d28a
VF		 1915 /* tx timer(to verify that no more than MAX_TX_IN_SECOND
1916 * lacpdu's are sent in one second)
1917 */
1da177e4
LT		 1918 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1919 port->aggregator = NULL;
1920 port->next_port_in_aggregator = NULL;
1921
1922 __disable_port(port);
1da177e4 1923
359632e5 1924 /* aggregator initialization */
3fdddd85 1925 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1da177e4
LT		 1926
1927 ad_initialize_agg(aggregator);
1928
1929 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
163c8ff3 1930 aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier;
1da177e4
LT		 1931 aggregator->slave = slave;
1932 aggregator->is_active = 0;
1933 aggregator->num_of_ports = 0;
1934 }
1da177e4
LT		 1935}
1936
1937/**
1938 * bond_3ad_unbind_slave - deinitialize a slave's port
1939 * @slave: slave struct to work on
1940 *
1941 * Search for the aggregator that is related to this port, remove the
1942 * aggregator and assign another aggregator for other port related to it
1943 * (if any), and remove the port.
1944 */
1945void bond_3ad_unbind_slave(struct slave *slave)
1946{
1947 struct port *port, *prev_port, *temp_port;
1948 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1949 int select_new_active_agg = 0;
0b088264
VF		 1950 struct bonding *bond = slave->bond;
1951 struct slave *slave_iter;
1952 struct list_head *iter;
ee637714 1953 bool dummy_slave_update; /* Ignore this value as caller updates array */
a361c83c 1954
e470259f
NA		 1955 /* Sync against bond_3ad_state_machine_handler() */
1956 spin_lock_bh(&bond->mode_lock);
3fdddd85 1957 aggregator = &(SLAVE_AD_INFO(slave)->aggregator);
1958 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 1959
3bf2d28a 1960 /* if slave is null, the whole port is not initialized */
1da177e4 1961 if (!port->slave) {
d4471f5e
VF		 1962 netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n",
1963 slave->dev->name);
e470259f 1964 goto out;
1da177e4
LT		 1965 }
1966
d4471f5e
VF		 1967 netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n",
1968 aggregator->aggregator_identifier);
1da177e4
LT		 1969
1970 /* Tell the partner that this port is not suitable for aggregation */
1971 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1972 __update_lacpdu_from_port(port);
1973 ad_lacpdu_send(port);
1974
3bf2d28a 1975 /* check if this aggregator is occupied */
1da177e4 1976 if (aggregator->lag_ports) {
3bf2d28a
VF		 1977 /* check if there are other ports related to this aggregator
1978 * except the port related to this slave(thats ensure us that
1979 * there is a reason to search for new aggregator, and that we
1980 * will find one
1981 */
1982 if ((aggregator->lag_ports != port) ||
1983 (aggregator->lag_ports->next_port_in_aggregator)) {
1984 /* find new aggregator for the related port(s) */
0b088264 1985 bond_for_each_slave(bond, slave_iter, iter) {
3fdddd85 1986 new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
3bf2d28a
VF		 1987 /* if the new aggregator is empty, or it is
1988 * connected to our port only
1989 */
1990 if (!new_aggregator->lag_ports ||
1991 ((new_aggregator->lag_ports == port) &&
1992 !new_aggregator->lag_ports->next_port_in_aggregator))
1da177e4 1993 break;
1da177e4 1994 }
0b088264
VF		 1995 if (!slave_iter)
1996 new_aggregator = NULL;
3bf2d28a
VF		 1997
1998 /* if new aggregator found, copy the aggregator's
1999 * parameters and connect the related lag_ports to the
2000 * new aggregator
2001 */
1da177e4 2002 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
d4471f5e
VF		 2003 netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n",
2004 aggregator->aggregator_identifier,
2005 new_aggregator->aggregator_identifier);
1da177e4 2006
3bf2d28a
VF		 2007 if ((new_aggregator->lag_ports == port) &&
2008 new_aggregator->is_active) {
d4471f5e 2009 netdev_info(bond->dev, "Removing an active aggregator\n");
1da177e4
LT		 2010 select_new_active_agg = 1;
2011 }
2012
2013 new_aggregator->is_individual = aggregator->is_individual;
2014 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2015 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2016 new_aggregator->partner_system = aggregator->partner_system;
2017 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2018 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2019 new_aggregator->receive_state = aggregator->receive_state;
2020 new_aggregator->transmit_state = aggregator->transmit_state;
2021 new_aggregator->lag_ports = aggregator->lag_ports;
2022 new_aggregator->is_active = aggregator->is_active;
2023 new_aggregator->num_of_ports = aggregator->num_of_ports;
2024
3bf2d28a
VF		 2025 /* update the information that is written on
2026 * the ports about the aggregator
2027 */
128ea6c3
BD		 2028 for (temp_port = aggregator->lag_ports; temp_port;
2029 temp_port = temp_port->next_port_in_aggregator) {
2030 temp_port->aggregator = new_aggregator;
1da177e4
LT		 2031 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2032 }
2033
1da177e4 2034 ad_clear_agg(aggregator);
a361c83c 2035
7bfc4753 2036 if (select_new_active_agg)
ee637714
MB		 2037 ad_agg_selection_logic(__get_first_agg(port),
2038 &dummy_slave_update);
1da177e4 2039 } else {
d4471f5e 2040 netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n");
1da177e4 2041 }
3bf2d28a
VF		 2042 } else {
2043 /* in case that the only port related to this
2044 * aggregator is the one we want to remove
2045 */
1da177e4 2046 select_new_active_agg = aggregator->is_active;
1da177e4
LT		 2047 ad_clear_agg(aggregator);
2048 if (select_new_active_agg) {
d4471f5e 2049 netdev_info(bond->dev, "Removing an active aggregator\n");
3bf2d28a 2050 /* select new active aggregator */
74684493
VF		 2051 temp_aggregator = __get_first_agg(port);
2052 if (temp_aggregator)
ee637714
MB		 2053 ad_agg_selection_logic(temp_aggregator,
2054 &dummy_slave_update);
1da177e4
LT		 2055 }
2056 }
2057 }
2058
d4471f5e 2059 netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number);
3bf2d28a
VF		 2060
2061 /* find the aggregator that this port is connected to */
0b088264 2062 bond_for_each_slave(bond, slave_iter, iter) {
3fdddd85 2063 temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator);
1da177e4 2064 prev_port = NULL;
3bf2d28a 2065 /* search the port in the aggregator's related ports */
128ea6c3
BD		 2066 for (temp_port = temp_aggregator->lag_ports; temp_port;
2067 prev_port = temp_port,
3bf2d28a
VF		 2068 temp_port = temp_port->next_port_in_aggregator) {
2069 if (temp_port == port) {
2070 /* the aggregator found - detach the port from
2071 * this aggregator
2072 */
7bfc4753 2073 if (prev_port)
1da177e4 2074 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
7bfc4753 2075 else
1da177e4 2076 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
1da177e4 2077 temp_aggregator->num_of_ports--;
128ea6c3 2078 if (temp_aggregator->num_of_ports == 0) {
1da177e4 2079 select_new_active_agg = temp_aggregator->is_active;
1da177e4
LT		 2080 ad_clear_agg(temp_aggregator);
2081 if (select_new_active_agg) {
d4471f5e 2082 netdev_info(bond->dev, "Removing an active aggregator\n");
3bf2d28a 2083 /* select new active aggregator */
ee637714
MB		 2084 ad_agg_selection_logic(__get_first_agg(port),
2085 &dummy_slave_update);
1da177e4
LT		 2086 }
2087 }
2088 break;
2089 }
2090 }
2091 }
128ea6c3 2092 port->slave = NULL;
e470259f
NA		 2093
2094out:
2095 spin_unlock_bh(&bond->mode_lock);
1da177e4
LT		 2096}
2097
2098/**
2099 * bond_3ad_state_machine_handler - handle state machines timeout
2100 * @bond: bonding struct to work on
2101 *
2102 * The state machine handling concept in this module is to check every tick
2103 * which state machine should operate any function. The execution order is
2104 * round robin, so when we have an interaction between state machines, the
2105 * reply of one to each other might be delayed until next tick.
2106 *
2107 * This function also complete the initialization when the agg_select_timer
2108 * times out, and it selects an aggregator for the ports that are yet not
2109 * related to any aggregator, and selects the active aggregator for a bond.
2110 */
1b76b316 2111void bond_3ad_state_machine_handler(struct work_struct *work)
1da177e4 2112{
1b76b316
JV		 2113 struct bonding *bond = container_of(work, struct bonding,
2114 ad_work.work);
1da177e4 2115 struct aggregator *aggregator;
3c4c88a1
VF		 2116 struct list_head *iter;
2117 struct slave *slave;
2118 struct port *port;
5e5b0665 2119 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
ee637714 2120 bool update_slave_arr = false;
1da177e4 2121
e470259f
NA		 2122 /* Lock to protect data accessed by all (e.g., port->sm_vars) and
2123 * against running with bond_3ad_unbind_slave. ad_rx_machine may run
2124 * concurrently due to incoming LACPDU as well.
2125 */
b7435628 2126 spin_lock_bh(&bond->mode_lock);
be79bd04 2127 rcu_read_lock();
1f2cd845 2128
be79bd04 2129 /* check if there are any slaves */
0965a1f3 2130 if (!bond_has_slaves(bond))
1da177e4 2131 goto re_arm;
1da177e4 2132
be79bd04 2133 /* check if agg_select_timer timer after initialize is timed out */
3bf2d28a
VF		 2134 if (BOND_AD_INFO(bond).agg_select_timer &&
2135 !(--BOND_AD_INFO(bond).agg_select_timer)) {
be79bd04 2136 slave = bond_first_slave_rcu(bond);
3fdddd85 2137 port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL;
fe9323da 2138
be79bd04 2139 /* select the active aggregator for the bond */
fe9323da 2140 if (port) {
1da177e4 2141 if (!port->slave) {
d4471f5e
VF		 2142 net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n",
2143 bond->dev->name);
1da177e4
LT		 2144 goto re_arm;
2145 }
2146
2147 aggregator = __get_first_agg(port);
ee637714 2148 ad_agg_selection_logic(aggregator, &update_slave_arr);
1da177e4 2149 }
f0c76d61 2150 bond_3ad_set_carrier(bond);
1da177e4
LT		 2151 }
2152
be79bd04 2153 /* for each port run the state machines */
2154 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 2155 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2156 if (!port->slave) {
d4471f5e 2157 net_warn_ratelimited("%s: Warning: Found an uninitialized port\n",
86a2b9cf 2158 bond->dev->name);
1da177e4
LT		 2159 goto re_arm;
2160 }
2161
2162 ad_rx_machine(NULL, port);
2163 ad_periodic_machine(port);
ee637714
MB		 2164 ad_port_selection_logic(port, &update_slave_arr);
2165 ad_mux_machine(port, &update_slave_arr);
1da177e4
LT		 2166 ad_tx_machine(port);
2167
be79bd04 2168 /* turn off the BEGIN bit, since we already handled it */
7bfc4753 2169 if (port->sm_vars & AD_PORT_BEGIN)
1da177e4 2170 port->sm_vars &= ~AD_PORT_BEGIN;
1da177e4
LT		 2171 }
2172
2173re_arm:
5e5b0665 2174 bond_for_each_slave_rcu(bond, slave, iter) {
2175 if (slave->should_notify) {
2176 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2177 break;
2178 }
2179 }
be79bd04 2180 rcu_read_unlock();
b7435628 2181 spin_unlock_bh(&bond->mode_lock);
5e5b0665 2182
ee637714
MB		 2183 if (update_slave_arr)
2184 bond_slave_arr_work_rearm(bond, 0);
2185
5e5b0665 2186 if (should_notify_rtnl && rtnl_trylock()) {
b0929915 2187 bond_slave_state_notify(bond);
5e5b0665 2188 rtnl_unlock();
2189 }
be79bd04 2190 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
1da177e4
LT		 2191}
2192
2193/**
2194 * bond_3ad_rx_indication - handle a received frame
2195 * @lacpdu: received lacpdu
2196 * @slave: slave struct to work on
2197 * @length: length of the data received
2198 *
2199 * It is assumed that frames that were sent on this NIC don't returned as new
2200 * received frames (loopback). Since only the payload is given to this
2201 * function, it check for loopback.
2202 */
3bf2d28a
VF		 2203static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave,
2204 u16 length)
1da177e4
LT		 2205{
2206 struct port *port;
13a8e0c8 2207 int ret = RX_HANDLER_ANOTHER;
1da177e4
LT		 2208
2209 if (length >= sizeof(struct lacpdu)) {
2210
3fdddd85 2211 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4
LT		 2212
2213 if (!port->slave) {
d4471f5e
VF		 2214 net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n",
2215 slave->dev->name, slave->bond->dev->name);
13a8e0c8 2216 return ret;
1da177e4
LT		 2217 }
2218
2219 switch (lacpdu->subtype) {
2220 case AD_TYPE_LACPDU:
13a8e0c8 2221 ret = RX_HANDLER_CONSUMED;
2f637324
SA		 2222 netdev_dbg(slave->bond->dev,
2223 "Received LACPDU on port %d slave %s\n",
2224 port->actor_port_number,
2225 slave->dev->name);
16d79d7d 2226 /* Protect against concurrent state machines */
e470259f 2227 spin_lock(&slave->bond->mode_lock);
1da177e4 2228 ad_rx_machine(lacpdu, port);
e470259f 2229 spin_unlock(&slave->bond->mode_lock);
1da177e4
LT		 2230 break;
2231
2232 case AD_TYPE_MARKER:
13a8e0c8 2233 ret = RX_HANDLER_CONSUMED;
3bf2d28a
VF		 2234 /* No need to convert fields to Little Endian since we
2235 * don't use the marker's fields.
2236 */
1da177e4 2237
1c3f0b8e 2238 switch (((struct bond_marker *)lacpdu)->tlv_type) {
1da177e4 2239 case AD_MARKER_INFORMATION_SUBTYPE:
d4471f5e
VF		 2240 netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n",
2241 port->actor_port_number);
1c3f0b8e 2242 ad_marker_info_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2243 break;
2244
2245 case AD_MARKER_RESPONSE_SUBTYPE:
d4471f5e
VF		 2246 netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n",
2247 port->actor_port_number);
1c3f0b8e 2248 ad_marker_response_received((struct bond_marker *)lacpdu, port);
1da177e4
LT		 2249 break;
2250
2251 default:
d4471f5e
VF		 2252 netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n",
2253 port->actor_port_number);
1da177e4
LT		 2254 }
2255 }
2256 }
13a8e0c8 2257 return ret;
1da177e4
LT		 2258}
2259
2260/**
2261 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2262 * @slave: slave struct to work on
2263 *
2264 * Handle reselection of aggregator (if needed) for this port.
2265 */
2266void bond_3ad_adapter_speed_changed(struct slave *slave)
2267{
2268 struct port *port;
2269
3fdddd85 2270 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2271
71a06c59 2272 /* if slave is null, the whole port is not initialized */
1da177e4 2273 if (!port->slave) {
d4471f5e
VF		 2274 netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n",
2275 slave->dev->name);
1da177e4
LT		 2276 return;
2277 }
2278
e470259f 2279 spin_lock_bh(&slave->bond->mode_lock);
71a06c59 2280
cb8dda90 2281 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
128ea6c3
BD		 2282 port->actor_oper_port_key = port->actor_admin_port_key |=
2283 (__get_link_speed(port) << 1);
d4471f5e 2284 netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number);
71a06c59 2285 /* there is no need to reselect a new aggregator, just signal the
2286 * state machines to reinitialize
2287 */
1da177e4 2288 port->sm_vars |= AD_PORT_BEGIN;
71a06c59 2289
e470259f 2290 spin_unlock_bh(&slave->bond->mode_lock);
1da177e4
LT		 2291}
2292
2293/**
2294 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2295 * @slave: slave struct to work on
2296 *
2297 * Handle reselection of aggregator (if needed) for this port.
2298 */
2299void bond_3ad_adapter_duplex_changed(struct slave *slave)
2300{
2301 struct port *port;
2302
3fdddd85 2303 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2304
bca44a73 2305 /* if slave is null, the whole port is not initialized */
1da177e4 2306 if (!port->slave) {
d4471f5e
VF		 2307 netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n",
2308 slave->dev->name);
1da177e4
LT		 2309 return;
2310 }
2311
e470259f 2312 spin_lock_bh(&slave->bond->mode_lock);
bca44a73 2313
cb8dda90 2314 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
128ea6c3
BD		 2315 port->actor_oper_port_key = port->actor_admin_port_key |=
2316 __get_duplex(port);
2f637324
SA		 2317 netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n",
2318 port->actor_port_number, slave->dev->name);
2319 if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)
2320 port->sm_vars |= AD_PORT_LACP_ENABLED;
bca44a73 2321 /* there is no need to reselect a new aggregator, just signal the
2322 * state machines to reinitialize
2323 */
1da177e4 2324 port->sm_vars |= AD_PORT_BEGIN;
bca44a73 2325
e470259f 2326 spin_unlock_bh(&slave->bond->mode_lock);
1da177e4
LT		 2327}
2328
2329/**
2330 * bond_3ad_handle_link_change - handle a slave's link status change indication
2331 * @slave: slave struct to work on
2332 * @status: whether the link is now up or down
2333 *
2334 * Handle reselection of aggregator (if needed) for this port.
2335 */
2336void bond_3ad_handle_link_change(struct slave *slave, char link)
2337{
2338 struct port *port;
2339
3fdddd85 2340 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4 2341
108db736 2342 /* if slave is null, the whole port is not initialized */
1da177e4 2343 if (!port->slave) {
d4471f5e
VF		 2344 netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n",
2345 slave->dev->name);
1da177e4
LT		 2346 return;
2347 }
2348
e470259f 2349 spin_lock_bh(&slave->bond->mode_lock);
108db736 2350 /* on link down we are zeroing duplex and speed since
2351 * some of the adaptors(ce1000.lan) report full duplex/speed
2352 * instead of N/A(duplex) / 0(speed).
2353 *
2354 * on link up we are forcing recheck on the duplex and speed since
2355 * some of he adaptors(ce1000.lan) report.
2356 */
1da177e4 2357 if (link == BOND_LINK_UP) {
f48127b6 2358 port->is_enabled = true;
cb8dda90 2359 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
128ea6c3
BD		 2360 port->actor_oper_port_key = port->actor_admin_port_key |=
2361 __get_duplex(port);
cb8dda90 2362 port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS;
128ea6c3
BD		 2363 port->actor_oper_port_key = port->actor_admin_port_key |=
2364 (__get_link_speed(port) << 1);
1da177e4
LT		 2365 } else {
2366 /* link has failed */
f48127b6 2367 port->is_enabled = false;
cb8dda90 2368 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS;
128ea6c3 2369 port->actor_oper_port_key = (port->actor_admin_port_key &=
cb8dda90 2370 ~AD_SPEED_KEY_MASKS);
1da177e4 2371 }
d4471f5e
VF		 2372 netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n",
2373 port->actor_port_number,
2374 link == BOND_LINK_UP ? "UP" : "DOWN");
108db736 2375 /* there is no need to reselect a new aggregator, just signal the
2376 * state machines to reinitialize
2377 */
1da177e4 2378 port->sm_vars |= AD_PORT_BEGIN;
108db736 2379
e470259f 2380 spin_unlock_bh(&slave->bond->mode_lock);
ee637714
MB		 2381
2382 /* RTNL is held and mode_lock is released so it's safe
2383 * to update slave_array here.
2384 */
2385 bond_update_slave_arr(slave->bond, NULL);
1da177e4
LT		 2386}
2387
3bf2d28a
VF		 2388/**
2389 * bond_3ad_set_carrier - set link state for bonding master
2390 * @bond - bonding structure
2391 *
2392 * if we have an active aggregator, we're up, if not, we're down.
2393 * Presumes that we cannot have an active aggregator if there are
2394 * no slaves with link up.
ff59c456 2395 *
031ae4de
JV		 2396 * This behavior complies with IEEE 802.3 section 43.3.9.
2397 *
ff59c456
JV		 2398 * Called by bond_set_carrier(). Return zero if carrier state does not
2399 * change, nonzero if it does.
2400 */
2401int bond_3ad_set_carrier(struct bonding *bond)
2402{
655f8919 2403 struct aggregator *active;
dec1e90e 2404 struct slave *first_slave;
c1bc9644 2405 int ret = 1;
655f8919 2406
be79bd04 2407 rcu_read_lock();
2408 first_slave = bond_first_slave_rcu(bond);
c1bc9644
VF		 2409 if (!first_slave) {
2410 ret = 0;
2411 goto out;
2412 }
3fdddd85 2413 active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator));
655f8919 2414 if (active) {
2415 /* are enough slaves available to consider link up? */
2416 if (active->num_of_ports < bond->params.min_links) {
2417 if (netif_carrier_ok(bond->dev)) {
2418 netif_carrier_off(bond->dev);
c1bc9644 2419 goto out;
655f8919 2420 }
2421 } else if (!netif_carrier_ok(bond->dev)) {
ff59c456 2422 netif_carrier_on(bond->dev);
c1bc9644 2423 goto out;
ff59c456 2424 }
c1bc9644 2425 } else if (netif_carrier_ok(bond->dev)) {
ff59c456 2426 netif_carrier_off(bond->dev);
ff59c456 2427 }
c1bc9644
VF		 2428out:
2429 rcu_read_unlock();
2430 return ret;
ff59c456
JV		 2431}
2432
1da177e4 2433/**
318debd8 2434 * __bond_3ad_get_active_agg_info - get information of the active aggregator
1da177e4
LT		 2435 * @bond: bonding struct to work on
2436 * @ad_info: ad_info struct to fill with the bond's info
2437 *
2438 * Returns: 0 on success
2439 * < 0 on error
2440 */
318debd8 2441int __bond_3ad_get_active_agg_info(struct bonding *bond,
2442 struct ad_info *ad_info)
1da177e4
LT		 2443{
2444 struct aggregator *aggregator = NULL;
3c4c88a1
VF		 2445 struct list_head *iter;
2446 struct slave *slave;
1da177e4
LT		 2447 struct port *port;
2448
47e91f56 2449 bond_for_each_slave_rcu(bond, slave, iter) {
3fdddd85 2450 port = &(SLAVE_AD_INFO(slave)->port);
1da177e4
LT		 2451 if (port->aggregator && port->aggregator->is_active) {
2452 aggregator = port->aggregator;
2453 break;
2454 }
2455 }
2456
21f374c6
JP		 2457 if (!aggregator)
2458 return -1;
2459
2460 ad_info->aggregator_id = aggregator->aggregator_identifier;
2461 ad_info->ports = aggregator->num_of_ports;
2462 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2463 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2464 ether_addr_copy(ad_info->partner_system,
2465 aggregator->partner_system.mac_addr_value);
2466 return 0;
1da177e4
LT		 2467}
2468
318debd8 2469int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2470{
2471 int ret;
2472
47e91f56 2473 rcu_read_lock();
318debd8 2474 ret = __bond_3ad_get_active_agg_info(bond, ad_info);
47e91f56 2475 rcu_read_unlock();
318debd8 2476
2477 return ret;
2478}
2479
de063b70
ED		 2480int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond,
2481 struct slave *slave)
1da177e4 2482{
de063b70
ED		 2483 struct lacpdu *lacpdu, _lacpdu;
2484
3aba891d 2485 if (skb->protocol != PKT_TYPE_LACPDU)
86e74986 2486 return RX_HANDLER_ANOTHER;
b3053251 2487
bb54e589
MB		 2488 if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr))
2489 return RX_HANDLER_ANOTHER;
2490
de063b70
ED		 2491 lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu);
2492 if (!lacpdu)
86e74986 2493 return RX_HANDLER_ANOTHER;
ab12811c 2494
86e74986 2495 return bond_3ad_rx_indication(lacpdu, slave, skb->len);
1da177e4 2496}
ba824a8b 2497
3bf2d28a
VF		 2498/**
2499 * bond_3ad_update_lacp_rate - change the lacp rate
2500 * @bond - bonding struct
2501 *
ba824a8b
PP		 2502 * When modify lacp_rate parameter via sysfs,
2503 * update actor_oper_port_state of each port.
2504 *
e470259f 2505 * Hold bond->mode_lock,
ba824a8b
PP		 2506 * so we can modify port->actor_oper_port_state,
2507 * no matter bond is up or down.
2508 */
2509void bond_3ad_update_lacp_rate(struct bonding *bond)
2510{
ba824a8b 2511 struct port *port = NULL;
9caff1e7 2512 struct list_head *iter;
c509316b 2513 struct slave *slave;
ba824a8b
PP		 2514 int lacp_fast;
2515
ba824a8b 2516 lacp_fast = bond->params.lacp_fast;
e470259f 2517 spin_lock_bh(&bond->mode_lock);
9caff1e7 2518 bond_for_each_slave(bond, slave, iter) {
3fdddd85 2519 port = &(SLAVE_AD_INFO(slave)->port);
ba824a8b
PP		 2520 if (lacp_fast)
2521 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
2522 else
2523 port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT;
ba824a8b 2524 }
e470259f 2525 spin_unlock_bh(&bond->mode_lock);
ba824a8b 2526}
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