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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070021 */
22
Joe Perchesa4aee5c2009-12-13 20:06:07 -080023#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/skbuff.h>
26#include <linux/if_ether.h>
27#include <linux/netdevice.h>
28#include <linux/spinlock.h>
29#include <linux/ethtool.h>
Jay Vosburghfd989c82008-11-04 17:51:16 -080030#include <linux/etherdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/if_bonding.h>
32#include <linux/pkt_sched.h>
Eric W. Biedermane730c152007-09-17 11:53:39 -070033#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "bonding.h"
35#include "bond_3ad.h"
36
37// General definitions
38#define AD_SHORT_TIMEOUT 1
39#define AD_LONG_TIMEOUT 0
40#define AD_STANDBY 0x2
41#define AD_MAX_TX_IN_SECOND 3
42#define AD_COLLECTOR_MAX_DELAY 0
43
44// Timer definitions(43.4.4 in the 802.3ad standard)
45#define AD_FAST_PERIODIC_TIME 1
46#define AD_SLOW_PERIODIC_TIME 30
47#define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME)
48#define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME)
49#define AD_CHURN_DETECTION_TIME 60
50#define AD_AGGREGATE_WAIT_TIME 2
51
52// Port state definitions(43.4.2.2 in the 802.3ad standard)
53#define AD_STATE_LACP_ACTIVITY 0x1
54#define AD_STATE_LACP_TIMEOUT 0x2
55#define AD_STATE_AGGREGATION 0x4
56#define AD_STATE_SYNCHRONIZATION 0x8
57#define AD_STATE_COLLECTING 0x10
58#define AD_STATE_DISTRIBUTING 0x20
59#define AD_STATE_DEFAULTED 0x40
60#define AD_STATE_EXPIRED 0x80
61
62// Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard)
63#define AD_PORT_BEGIN 0x1
64#define AD_PORT_LACP_ENABLED 0x2
65#define AD_PORT_ACTOR_CHURN 0x4
66#define AD_PORT_PARTNER_CHURN 0x8
67#define AD_PORT_READY 0x10
68#define AD_PORT_READY_N 0x20
69#define AD_PORT_MATCHED 0x40
70#define AD_PORT_STANDBY 0x80
71#define AD_PORT_SELECTED 0x100
72#define AD_PORT_MOVED 0x200
73
74// Port Key definitions
75// key is determined according to the link speed, duplex and
76// user key(which is yet not supported)
77// ------------------------------------------------------------
78// Port key : | User key | Speed |Duplex|
79// ------------------------------------------------------------
80// 16 6 1 0
81#define AD_DUPLEX_KEY_BITS 0x1
82#define AD_SPEED_KEY_BITS 0x3E
83#define AD_USER_KEY_BITS 0xFFC0
84
85//dalloun
86#define AD_LINK_SPEED_BITMASK_1MBPS 0x1
87#define AD_LINK_SPEED_BITMASK_10MBPS 0x2
88#define AD_LINK_SPEED_BITMASK_100MBPS 0x4
89#define AD_LINK_SPEED_BITMASK_1000MBPS 0x8
Jay Vosburgh94dbffd2006-09-22 21:52:15 -070090#define AD_LINK_SPEED_BITMASK_10000MBPS 0x10
Linus Torvalds1da177e2005-04-16 15:20:36 -070091//endalloun
92
93// compare MAC addresses
94#define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN)
95
Bandan Das128ea6c2010-10-16 20:19:58 +000096static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } };
Linus Torvalds1da177e2005-04-16 15:20:36 -070097static u16 ad_ticks_per_sec;
98static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000;
99
Holger Eitzenbergere4ac4322008-12-26 13:40:48 -0800100static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102// ================= main 802.3ad protocol functions ==================
103static int ad_lacpdu_send(struct port *port);
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -0700104static int ad_marker_send(struct port *port, struct bond_marker *marker);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105static void ad_mux_machine(struct port *port);
106static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port);
107static void ad_tx_machine(struct port *port);
108static void ad_periodic_machine(struct port *port);
109static void ad_port_selection_logic(struct port *port);
110static void ad_agg_selection_logic(struct aggregator *aggregator);
111static void ad_clear_agg(struct aggregator *aggregator);
112static void ad_initialize_agg(struct aggregator *aggregator);
113static void ad_initialize_port(struct port *port, int lacp_fast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114static void ad_enable_collecting_distributing(struct port *port);
115static void ad_disable_collecting_distributing(struct port *port);
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -0700116static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port);
117static void ad_marker_response_received(struct bond_marker *marker, struct port *port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
119
120/////////////////////////////////////////////////////////////////////////////////
121// ================= api to bonding and kernel code ==================
122/////////////////////////////////////////////////////////////////////////////////
123
124/**
125 * __get_bond_by_port - get the port's bonding struct
126 * @port: the port we're looking at
127 *
128 * Return @port's bonding struct, or %NULL if it can't be found.
129 */
130static inline struct bonding *__get_bond_by_port(struct port *port)
131{
Bandan Das7bfc4752010-10-16 20:19:59 +0000132 if (port->slave == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135 return bond_get_bond_by_slave(port->slave);
136}
137
138/**
139 * __get_first_port - get the first port in the bond
140 * @bond: the bond we're looking at
141 *
142 * Return the port of the first slave in @bond, or %NULL if it can't be found.
143 */
144static inline struct port *__get_first_port(struct bonding *bond)
145{
Bandan Das7bfc4752010-10-16 20:19:59 +0000146 if (bond->slave_cnt == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149 return &(SLAVE_AD_INFO(bond->first_slave).port);
150}
151
152/**
153 * __get_next_port - get the next port in the bond
154 * @port: the port we're looking at
155 *
156 * Return the port of the slave that is next in line of @port's slave in the
157 * bond, or %NULL if it can't be found.
158 */
159static inline struct port *__get_next_port(struct port *port)
160{
161 struct bonding *bond = __get_bond_by_port(port);
162 struct slave *slave = port->slave;
163
164 // If there's no bond for this port, or this is the last slave
Bandan Das7bfc4752010-10-16 20:19:59 +0000165 if ((bond == NULL) || (slave->next == bond->first_slave))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168 return &(SLAVE_AD_INFO(slave->next).port);
169}
170
171/**
172 * __get_first_agg - get the first aggregator in the bond
173 * @bond: the bond we're looking at
174 *
175 * Return the aggregator of the first slave in @bond, or %NULL if it can't be
176 * found.
177 */
178static inline struct aggregator *__get_first_agg(struct port *port)
179{
180 struct bonding *bond = __get_bond_by_port(port);
181
182 // If there's no bond for this port, or bond has no slaves
Bandan Das7bfc4752010-10-16 20:19:59 +0000183 if ((bond == NULL) || (bond->slave_cnt == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186 return &(SLAVE_AD_INFO(bond->first_slave).aggregator);
187}
188
189/**
190 * __get_next_agg - get the next aggregator in the bond
191 * @aggregator: the aggregator we're looking at
192 *
193 * Return the aggregator of the slave that is next in line of @aggregator's
194 * slave in the bond, or %NULL if it can't be found.
195 */
196static inline struct aggregator *__get_next_agg(struct aggregator *aggregator)
197{
198 struct slave *slave = aggregator->slave;
199 struct bonding *bond = bond_get_bond_by_slave(slave);
200
201 // If there's no bond for this aggregator, or this is the last slave
Bandan Das7bfc4752010-10-16 20:19:59 +0000202 if ((bond == NULL) || (slave->next == bond->first_slave))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
205 return &(SLAVE_AD_INFO(slave->next).aggregator);
206}
207
Jay Vosburghfd989c82008-11-04 17:51:16 -0800208/*
209 * __agg_has_partner
210 *
211 * Return nonzero if aggregator has a partner (denoted by a non-zero ether
212 * address for the partner). Return 0 if not.
213 */
214static inline int __agg_has_partner(struct aggregator *agg)
215{
216 return !is_zero_ether_addr(agg->partner_system.mac_addr_value);
217}
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219/**
220 * __disable_port - disable the port's slave
221 * @port: the port we're looking at
222 *
223 */
224static inline void __disable_port(struct port *port)
225{
226 bond_set_slave_inactive_flags(port->slave);
227}
228
229/**
230 * __enable_port - enable the port's slave, if it's up
231 * @port: the port we're looking at
232 *
233 */
234static inline void __enable_port(struct port *port)
235{
236 struct slave *slave = port->slave;
237
Bandan Das7bfc4752010-10-16 20:19:59 +0000238 if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 bond_set_slave_active_flags(slave);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
242/**
243 * __port_is_enabled - check if the port's slave is in active state
244 * @port: the port we're looking at
245 *
246 */
247static inline int __port_is_enabled(struct port *port)
248{
Jiri Pirkoe30bc062011-03-12 03:14:37 +0000249 return bond_is_active_slave(port->slave);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250}
251
252/**
253 * __get_agg_selection_mode - get the aggregator selection mode
254 * @port: the port we're looking at
255 *
Jay Vosburghfd989c82008-11-04 17:51:16 -0800256 * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 */
258static inline u32 __get_agg_selection_mode(struct port *port)
259{
260 struct bonding *bond = __get_bond_by_port(port);
261
Bandan Das7bfc4752010-10-16 20:19:59 +0000262 if (bond == NULL)
Jay Vosburghfd989c82008-11-04 17:51:16 -0800263 return BOND_AD_STABLE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
265 return BOND_AD_INFO(bond).agg_select_mode;
266}
267
268/**
269 * __check_agg_selection_timer - check if the selection timer has expired
270 * @port: the port we're looking at
271 *
272 */
273static inline int __check_agg_selection_timer(struct port *port)
274{
275 struct bonding *bond = __get_bond_by_port(port);
276
Bandan Das7bfc4752010-10-16 20:19:59 +0000277 if (bond == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279
280 return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0;
281}
282
283/**
Nils Carlson9ac35242011-03-03 22:09:12 +0000284 * __get_state_machine_lock - lock the port's state machines
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 * @port: the port we're looking at
286 *
287 */
Nils Carlson9ac35242011-03-03 22:09:12 +0000288static inline void __get_state_machine_lock(struct port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289{
Nils Carlson9ac35242011-03-03 22:09:12 +0000290 spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291}
292
293/**
Nils Carlson9ac35242011-03-03 22:09:12 +0000294 * __release_state_machine_lock - unlock the port's state machines
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 * @port: the port we're looking at
296 *
297 */
Nils Carlson9ac35242011-03-03 22:09:12 +0000298static inline void __release_state_machine_lock(struct port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
Nils Carlson9ac35242011-03-03 22:09:12 +0000300 spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301}
302
303/**
304 * __get_link_speed - get a port's speed
305 * @port: the port we're looking at
306 *
307 * Return @port's speed in 802.3ad bitmask format. i.e. one of:
308 * 0,
309 * %AD_LINK_SPEED_BITMASK_10MBPS,
310 * %AD_LINK_SPEED_BITMASK_100MBPS,
Jay Vosburgh94dbffd2006-09-22 21:52:15 -0700311 * %AD_LINK_SPEED_BITMASK_1000MBPS,
312 * %AD_LINK_SPEED_BITMASK_10000MBPS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 */
314static u16 __get_link_speed(struct port *port)
315{
316 struct slave *slave = port->slave;
317 u16 speed;
318
319 /* this if covers only a special case: when the configuration starts with
320 * link down, it sets the speed to 0.
321 * This is done in spite of the fact that the e100 driver reports 0 to be
322 * compatible with MVT in the future.*/
Bandan Das7bfc4752010-10-16 20:19:59 +0000323 if (slave->link != BOND_LINK_UP)
Bandan Das128ea6c2010-10-16 20:19:58 +0000324 speed = 0;
Bandan Das7bfc4752010-10-16 20:19:59 +0000325 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 switch (slave->speed) {
327 case SPEED_10:
328 speed = AD_LINK_SPEED_BITMASK_10MBPS;
329 break;
330
331 case SPEED_100:
332 speed = AD_LINK_SPEED_BITMASK_100MBPS;
333 break;
334
335 case SPEED_1000:
336 speed = AD_LINK_SPEED_BITMASK_1000MBPS;
337 break;
338
Jay Vosburgh94dbffd2006-09-22 21:52:15 -0700339 case SPEED_10000:
340 speed = AD_LINK_SPEED_BITMASK_10000MBPS;
341 break;
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 default:
344 speed = 0; // unknown speed value from ethtool. shouldn't happen
345 break;
346 }
347 }
348
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800349 pr_debug("Port %d Received link speed %d update from adapter\n",
350 port->actor_port_number, speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 return speed;
352}
353
354/**
355 * __get_duplex - get a port's duplex
356 * @port: the port we're looking at
357 *
358 * Return @port's duplex in 802.3ad bitmask format. i.e.:
359 * 0x01 if in full duplex
360 * 0x00 otherwise
361 */
362static u8 __get_duplex(struct port *port)
363{
364 struct slave *slave = port->slave;
365
366 u8 retval;
367
368 // handling a special case: when the configuration starts with
369 // link down, it sets the duplex to 0.
Bandan Das7bfc4752010-10-16 20:19:59 +0000370 if (slave->link != BOND_LINK_UP)
Bandan Das128ea6c2010-10-16 20:19:58 +0000371 retval = 0x0;
Bandan Das7bfc4752010-10-16 20:19:59 +0000372 else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 switch (slave->duplex) {
374 case DUPLEX_FULL:
Bandan Das128ea6c2010-10-16 20:19:58 +0000375 retval = 0x1;
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800376 pr_debug("Port %d Received status full duplex update from adapter\n",
377 port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 break;
379 case DUPLEX_HALF:
380 default:
Bandan Das128ea6c2010-10-16 20:19:58 +0000381 retval = 0x0;
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800382 pr_debug("Port %d Received status NOT full duplex update from adapter\n",
383 port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 break;
385 }
386 }
387 return retval;
388}
389
390/**
Nils Carlson9ac35242011-03-03 22:09:12 +0000391 * __initialize_port_locks - initialize a port's STATE machine spinlock
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 * @port: the port we're looking at
393 *
394 */
395static inline void __initialize_port_locks(struct port *port)
396{
397 // make sure it isn't called twice
Nils Carlson9ac35242011-03-03 22:09:12 +0000398 spin_lock_init(&(SLAVE_AD_INFO(port->slave).state_machine_lock));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399}
400
401//conversions
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403/**
404 * __ad_timer_to_ticks - convert a given timer type to AD module ticks
405 * @timer_type: which timer to operate
406 * @par: timer parameter. see below
407 *
408 * If @timer_type is %current_while_timer, @par indicates long/short timer.
409 * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME,
410 * %SLOW_PERIODIC_TIME.
411 */
412static u16 __ad_timer_to_ticks(u16 timer_type, u16 par)
413{
Bandan Das128ea6c2010-10-16 20:19:58 +0000414 u16 retval = 0; /* to silence the compiler */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416 switch (timer_type) {
417 case AD_CURRENT_WHILE_TIMER: // for rx machine usage
Bandan Das7bfc4752010-10-16 20:19:59 +0000418 if (par)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout
Bandan Das7bfc4752010-10-16 20:19:59 +0000420 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 break;
423 case AD_ACTOR_CHURN_TIMER: // for local churn machine
424 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
425 break;
426 case AD_PERIODIC_TIMER: // for periodic machine
427 retval = (par*ad_ticks_per_sec); // long timeout
428 break;
429 case AD_PARTNER_CHURN_TIMER: // for remote churn machine
430 retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec);
431 break;
432 case AD_WAIT_WHILE_TIMER: // for selection machine
433 retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec);
434 break;
435 }
436 return retval;
437}
438
439
440/////////////////////////////////////////////////////////////////////////////////
441// ================= ad_rx_machine helper functions ==================
442/////////////////////////////////////////////////////////////////////////////////
443
444/**
Jay Vosburgh2d6682d2009-11-13 13:13:01 +0000445 * __choose_matched - update a port's matched variable from a received lacpdu
446 * @lacpdu: the lacpdu we've received
447 * @port: the port we're looking at
448 *
449 * Update the value of the matched variable, using parameter values from a
450 * newly received lacpdu. Parameter values for the partner carried in the
451 * received PDU are compared with the corresponding operational parameter
452 * values for the actor. Matched is set to TRUE if all of these parameters
453 * match and the PDU parameter partner_state.aggregation has the same value as
454 * actor_oper_port_state.aggregation and lacp will actively maintain the link
455 * in the aggregation. Matched is also set to TRUE if the value of
456 * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates
457 * an individual link and lacp will actively maintain the link. Otherwise,
458 * matched is set to FALSE. LACP is considered to be actively maintaining the
459 * link if either the PDU's actor_state.lacp_activity variable is TRUE or both
460 * the actor's actor_oper_port_state.lacp_activity and the PDU's
461 * partner_state.lacp_activity variables are TRUE.
462 *
463 * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is
464 * used here to implement the language from 802.3ad 43.4.9 that requires
465 * recordPDU to "match" the LACPDU parameters to the stored values.
466 */
467static void __choose_matched(struct lacpdu *lacpdu, struct port *port)
468{
469 // check if all parameters are alike
470 if (((ntohs(lacpdu->partner_port) == port->actor_port_number) &&
471 (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) &&
472 !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) &&
473 (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) &&
474 (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) &&
475 ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) ||
476 // or this is individual link(aggregation == FALSE)
477 ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0)
478 ) {
479 // update the state machine Matched variable
480 port->sm_vars |= AD_PORT_MATCHED;
481 } else {
482 port->sm_vars &= ~AD_PORT_MATCHED;
483 }
484}
485
486/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 * __record_pdu - record parameters from a received lacpdu
488 * @lacpdu: the lacpdu we've received
489 * @port: the port we're looking at
490 *
491 * Record the parameter values for the Actor carried in a received lacpdu as
492 * the current partner operational parameter values and sets
493 * actor_oper_port_state.defaulted to FALSE.
494 */
495static void __record_pdu(struct lacpdu *lacpdu, struct port *port)
496{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 if (lacpdu && port) {
Holger Eitzenbergerb99d6ba2008-12-17 19:08:14 -0800498 struct port_params *partner = &port->partner_oper;
499
Jay Vosburgh2d6682d2009-11-13 13:13:01 +0000500 __choose_matched(lacpdu, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 // record the new parameter values for the partner operational
Holger Eitzenbergerb99d6ba2008-12-17 19:08:14 -0800502 partner->port_number = ntohs(lacpdu->actor_port);
503 partner->port_priority = ntohs(lacpdu->actor_port_priority);
504 partner->system = lacpdu->actor_system;
505 partner->system_priority = ntohs(lacpdu->actor_system_priority);
506 partner->key = ntohs(lacpdu->actor_key);
507 partner->port_state = lacpdu->actor_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
509 // set actor_oper_port_state.defaulted to FALSE
510 port->actor_oper_port_state &= ~AD_STATE_DEFAULTED;
511
512 // set the partner sync. to on if the partner is sync. and the port is matched
Bandan Das7bfc4752010-10-16 20:19:59 +0000513 if ((port->sm_vars & AD_PORT_MATCHED)
514 && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION))
Holger Eitzenbergerb99d6ba2008-12-17 19:08:14 -0800515 partner->port_state |= AD_STATE_SYNCHRONIZATION;
Bandan Das7bfc4752010-10-16 20:19:59 +0000516 else
Holger Eitzenbergerb99d6ba2008-12-17 19:08:14 -0800517 partner->port_state &= ~AD_STATE_SYNCHRONIZATION;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
519}
520
521/**
522 * __record_default - record default parameters
523 * @port: the port we're looking at
524 *
525 * This function records the default parameter values for the partner carried
526 * in the Partner Admin parameters as the current partner operational parameter
527 * values and sets actor_oper_port_state.defaulted to TRUE.
528 */
529static void __record_default(struct port *port)
530{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 if (port) {
532 // record the partner admin parameters
Holger Eitzenberger5eefd1a2008-12-17 19:08:46 -0800533 memcpy(&port->partner_oper, &port->partner_admin,
534 sizeof(struct port_params));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535
536 // set actor_oper_port_state.defaulted to true
537 port->actor_oper_port_state |= AD_STATE_DEFAULTED;
538 }
539}
540
541/**
542 * __update_selected - update a port's Selected variable from a received lacpdu
543 * @lacpdu: the lacpdu we've received
544 * @port: the port we're looking at
545 *
546 * Update the value of the selected variable, using parameter values from a
547 * newly received lacpdu. The parameter values for the Actor carried in the
548 * received PDU are compared with the corresponding operational parameter
549 * values for the ports partner. If one or more of the comparisons shows that
550 * the value(s) received in the PDU differ from the current operational values,
551 * then selected is set to FALSE and actor_oper_port_state.synchronization is
552 * set to out_of_sync. Otherwise, selected remains unchanged.
553 */
554static void __update_selected(struct lacpdu *lacpdu, struct port *port)
555{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 if (lacpdu && port) {
Holger Eitzenbergerce6a49a2008-12-17 19:13:07 -0800557 const struct port_params *partner = &port->partner_oper;
558
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 // check if any parameter is different
Joe Perches8e95a202009-12-03 07:58:21 +0000560 if (ntohs(lacpdu->actor_port) != partner->port_number ||
561 ntohs(lacpdu->actor_port_priority) != partner->port_priority ||
562 MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) ||
563 ntohs(lacpdu->actor_system_priority) != partner->system_priority ||
564 ntohs(lacpdu->actor_key) != partner->key ||
565 (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 // update the state machine Selected variable
567 port->sm_vars &= ~AD_PORT_SELECTED;
568 }
569 }
570}
571
572/**
573 * __update_default_selected - update a port's Selected variable from Partner
574 * @port: the port we're looking at
575 *
576 * This function updates the value of the selected variable, using the partner
577 * administrative parameter values. The administrative values are compared with
578 * the corresponding operational parameter values for the partner. If one or
579 * more of the comparisons shows that the administrative value(s) differ from
580 * the current operational values, then Selected is set to FALSE and
581 * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise,
582 * Selected remains unchanged.
583 */
584static void __update_default_selected(struct port *port)
585{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 if (port) {
Holger Eitzenberger3c520652008-12-17 19:13:27 -0800587 const struct port_params *admin = &port->partner_admin;
588 const struct port_params *oper = &port->partner_oper;
589
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 // check if any parameter is different
Joe Perches8e95a202009-12-03 07:58:21 +0000591 if (admin->port_number != oper->port_number ||
592 admin->port_priority != oper->port_priority ||
593 MAC_ADDRESS_COMPARE(&admin->system, &oper->system) ||
594 admin->system_priority != oper->system_priority ||
595 admin->key != oper->key ||
596 (admin->port_state & AD_STATE_AGGREGATION)
Holger Eitzenberger3c520652008-12-17 19:13:27 -0800597 != (oper->port_state & AD_STATE_AGGREGATION)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 // update the state machine Selected variable
599 port->sm_vars &= ~AD_PORT_SELECTED;
600 }
601 }
602}
603
604/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 * __update_ntt - update a port's ntt variable from a received lacpdu
606 * @lacpdu: the lacpdu we've received
607 * @port: the port we're looking at
608 *
609 * Updates the value of the ntt variable, using parameter values from a newly
610 * received lacpdu. The parameter values for the partner carried in the
611 * received PDU are compared with the corresponding operational parameter
612 * values for the Actor. If one or more of the comparisons shows that the
613 * value(s) received in the PDU differ from the current operational values,
614 * then ntt is set to TRUE. Otherwise, ntt remains unchanged.
615 */
616static void __update_ntt(struct lacpdu *lacpdu, struct port *port)
617{
618 // validate lacpdu and port
619 if (lacpdu && port) {
620 // check if any parameter is different
Jay Vosburgh89cc76f2006-09-22 21:55:32 -0700621 if ((ntohs(lacpdu->partner_port) != port->actor_port_number) ||
622 (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) ||
Jay Vosburgh89cc76f2006-09-22 21:55:32 -0700624 (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) ||
625 (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626 ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) ||
627 ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) ||
628 ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) ||
629 ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION))
630 ) {
Holger Eitzenbergerd238d452008-12-26 11:18:15 -0800631
632 port->ntt = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 }
634 }
635}
636
637/**
638 * __attach_bond_to_agg
639 * @port: the port we're looking at
640 *
641 * Handle the attaching of the port's control parser/multiplexer and the
642 * aggregator. This function does nothing since the parser/multiplexer of the
643 * receive and the parser/multiplexer of the aggregator are already combined.
644 */
645static void __attach_bond_to_agg(struct port *port)
646{
Bandan Das128ea6c2010-10-16 20:19:58 +0000647 port = NULL; /* just to satisfy the compiler */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 // This function does nothing since the parser/multiplexer of the receive
649 // and the parser/multiplexer of the aggregator are already combined
650}
651
652/**
653 * __detach_bond_from_agg
654 * @port: the port we're looking at
655 *
656 * Handle the detaching of the port's control parser/multiplexer from the
657 * aggregator. This function does nothing since the parser/multiplexer of the
658 * receive and the parser/multiplexer of the aggregator are already combined.
659 */
660static void __detach_bond_from_agg(struct port *port)
661{
Bandan Das128ea6c2010-10-16 20:19:58 +0000662 port = NULL; /* just to satisfy the compiler */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 // This function does nothing sience the parser/multiplexer of the receive
664 // and the parser/multiplexer of the aggregator are already combined
665}
666
667/**
668 * __agg_ports_are_ready - check if all ports in an aggregator are ready
669 * @aggregator: the aggregator we're looking at
670 *
671 */
672static int __agg_ports_are_ready(struct aggregator *aggregator)
673{
674 struct port *port;
675 int retval = 1;
676
677 if (aggregator) {
678 // scan all ports in this aggregator to verfy if they are all ready
Bandan Das128ea6c2010-10-16 20:19:58 +0000679 for (port = aggregator->lag_ports;
680 port;
681 port = port->next_port_in_aggregator) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 if (!(port->sm_vars & AD_PORT_READY_N)) {
683 retval = 0;
684 break;
685 }
686 }
687 }
688
689 return retval;
690}
691
692/**
693 * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator
694 * @aggregator: the aggregator we're looking at
695 * @val: Should the ports' ready bit be set on or off
696 *
697 */
698static void __set_agg_ports_ready(struct aggregator *aggregator, int val)
699{
700 struct port *port;
701
Bandan Das128ea6c2010-10-16 20:19:58 +0000702 for (port = aggregator->lag_ports; port;
703 port = port->next_port_in_aggregator) {
Bandan Das7bfc4752010-10-16 20:19:59 +0000704 if (val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 port->sm_vars |= AD_PORT_READY;
Bandan Das7bfc4752010-10-16 20:19:59 +0000706 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 port->sm_vars &= ~AD_PORT_READY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 }
709}
710
711/**
712 * __get_agg_bandwidth - get the total bandwidth of an aggregator
713 * @aggregator: the aggregator we're looking at
714 *
715 */
716static u32 __get_agg_bandwidth(struct aggregator *aggregator)
717{
Bandan Das128ea6c2010-10-16 20:19:58 +0000718 u32 bandwidth = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
720 if (aggregator->num_of_ports) {
David Decotigny65cce192011-04-13 15:22:30 +0000721 switch (__get_link_speed(aggregator->lag_ports)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 case AD_LINK_SPEED_BITMASK_1MBPS:
723 bandwidth = aggregator->num_of_ports;
724 break;
725 case AD_LINK_SPEED_BITMASK_10MBPS:
726 bandwidth = aggregator->num_of_ports * 10;
727 break;
728 case AD_LINK_SPEED_BITMASK_100MBPS:
729 bandwidth = aggregator->num_of_ports * 100;
730 break;
731 case AD_LINK_SPEED_BITMASK_1000MBPS:
732 bandwidth = aggregator->num_of_ports * 1000;
733 break;
Jay Vosburgh94dbffd2006-09-22 21:52:15 -0700734 case AD_LINK_SPEED_BITMASK_10000MBPS:
735 bandwidth = aggregator->num_of_ports * 10000;
736 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 default:
Bandan Das128ea6c2010-10-16 20:19:58 +0000738 bandwidth = 0; /*to silence the compiler ....*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739 }
740 }
741 return bandwidth;
742}
743
744/**
745 * __get_active_agg - get the current active aggregator
746 * @aggregator: the aggregator we're looking at
747 *
748 */
749static struct aggregator *__get_active_agg(struct aggregator *aggregator)
750{
751 struct aggregator *retval = NULL;
752
753 for (; aggregator; aggregator = __get_next_agg(aggregator)) {
754 if (aggregator->is_active) {
755 retval = aggregator;
756 break;
757 }
758 }
759
760 return retval;
761}
762
763/**
764 * __update_lacpdu_from_port - update a port's lacpdu fields
765 * @port: the port we're looking at
766 *
767 */
768static inline void __update_lacpdu_from_port(struct port *port)
769{
770 struct lacpdu *lacpdu = &port->lacpdu;
Holger Eitzenberger3b5b35d2008-12-17 19:13:53 -0800771 const struct port_params *partner = &port->partner_oper;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
773 /* update current actual Actor parameters */
774 /* lacpdu->subtype initialized
775 * lacpdu->version_number initialized
776 * lacpdu->tlv_type_actor_info initialized
777 * lacpdu->actor_information_length initialized
778 */
779
Al Virod3bb52b2007-08-22 20:06:58 -0400780 lacpdu->actor_system_priority = htons(port->actor_system_priority);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 lacpdu->actor_system = port->actor_system;
Al Virod3bb52b2007-08-22 20:06:58 -0400782 lacpdu->actor_key = htons(port->actor_oper_port_key);
783 lacpdu->actor_port_priority = htons(port->actor_port_priority);
784 lacpdu->actor_port = htons(port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 lacpdu->actor_state = port->actor_oper_port_state;
786
787 /* lacpdu->reserved_3_1 initialized
788 * lacpdu->tlv_type_partner_info initialized
789 * lacpdu->partner_information_length initialized
790 */
791
Holger Eitzenberger3b5b35d2008-12-17 19:13:53 -0800792 lacpdu->partner_system_priority = htons(partner->system_priority);
793 lacpdu->partner_system = partner->system;
794 lacpdu->partner_key = htons(partner->key);
795 lacpdu->partner_port_priority = htons(partner->port_priority);
796 lacpdu->partner_port = htons(partner->port_number);
797 lacpdu->partner_state = partner->port_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
799 /* lacpdu->reserved_3_2 initialized
800 * lacpdu->tlv_type_collector_info initialized
801 * lacpdu->collector_information_length initialized
802 * collector_max_delay initialized
803 * reserved_12[12] initialized
804 * tlv_type_terminator initialized
805 * terminator_length initialized
806 * reserved_50[50] initialized
807 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808}
809
810//////////////////////////////////////////////////////////////////////////////////////
811// ================= main 802.3ad protocol code ======================================
812//////////////////////////////////////////////////////////////////////////////////////
813
814/**
815 * ad_lacpdu_send - send out a lacpdu packet on a given port
816 * @port: the port we're looking at
817 *
818 * Returns: 0 on success
819 * < 0 on error
820 */
821static int ad_lacpdu_send(struct port *port)
822{
823 struct slave *slave = port->slave;
824 struct sk_buff *skb;
825 struct lacpdu_header *lacpdu_header;
826 int length = sizeof(struct lacpdu_header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
828 skb = dev_alloc_skb(length);
Bandan Das7bfc4752010-10-16 20:19:59 +0000829 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
832 skb->dev = slave->dev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -0700833 skb_reset_mac_header(skb);
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700834 skb->network_header = skb->mac_header + ETH_HLEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 skb->protocol = PKT_TYPE_LACPDU;
836 skb->priority = TC_PRIO_CONTROL;
837
838 lacpdu_header = (struct lacpdu_header *)skb_put(skb, length);
839
Holger Eitzenbergere7271492008-12-26 13:41:53 -0800840 memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
Uwe Kleine-Königb5950762010-11-01 15:38:34 -0400841 /* Note: source address is set to be the member's PERMANENT address,
Holger Eitzenbergere4ac4322008-12-26 13:40:48 -0800842 because we use it to identify loopback lacpdus in receive. */
Holger Eitzenbergere7271492008-12-26 13:41:53 -0800843 memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
844 lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
846 lacpdu_header->lacpdu = port->lacpdu; // struct copy
847
848 dev_queue_xmit(skb);
849
850 return 0;
851}
852
853/**
854 * ad_marker_send - send marker information/response on a given port
855 * @port: the port we're looking at
856 * @marker: marker data to send
857 *
858 * Returns: 0 on success
859 * < 0 on error
860 */
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -0700861static int ad_marker_send(struct port *port, struct bond_marker *marker)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862{
863 struct slave *slave = port->slave;
864 struct sk_buff *skb;
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -0700865 struct bond_marker_header *marker_header;
866 int length = sizeof(struct bond_marker_header);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867
868 skb = dev_alloc_skb(length + 16);
Bandan Das7bfc4752010-10-16 20:19:59 +0000869 if (!skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
872 skb_reserve(skb, 16);
873
874 skb->dev = slave->dev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -0700875 skb_reset_mac_header(skb);
Arnaldo Carvalho de Melob0e380b2007-04-10 21:21:55 -0700876 skb->network_header = skb->mac_header + ETH_HLEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 skb->protocol = PKT_TYPE_LACPDU;
878
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -0700879 marker_header = (struct bond_marker_header *)skb_put(skb, length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880
Holger Eitzenbergere7271492008-12-26 13:41:53 -0800881 memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN);
Uwe Kleine-Königb5950762010-11-01 15:38:34 -0400882 /* Note: source address is set to be the member's PERMANENT address,
Holger Eitzenbergere4ac4322008-12-26 13:40:48 -0800883 because we use it to identify loopback MARKERs in receive. */
Holger Eitzenbergere7271492008-12-26 13:41:53 -0800884 memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN);
885 marker_header->hdr.h_proto = PKT_TYPE_LACPDU;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886
887 marker_header->marker = *marker; // struct copy
888
889 dev_queue_xmit(skb);
890
891 return 0;
892}
893
894/**
895 * ad_mux_machine - handle a port's mux state machine
896 * @port: the port we're looking at
897 *
898 */
899static void ad_mux_machine(struct port *port)
900{
901 mux_states_t last_state;
902
903 // keep current State Machine state to compare later if it was changed
904 last_state = port->sm_mux_state;
905
906 if (port->sm_vars & AD_PORT_BEGIN) {
907 port->sm_mux_state = AD_MUX_DETACHED; // next state
908 } else {
909 switch (port->sm_mux_state) {
910 case AD_MUX_DETACHED:
Bandan Das7bfc4752010-10-16 20:19:59 +0000911 if ((port->sm_vars & AD_PORT_SELECTED)
912 || (port->sm_vars & AD_PORT_STANDBY))
913 /* if SELECTED or STANDBY */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 port->sm_mux_state = AD_MUX_WAITING; // next state
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 break;
916 case AD_MUX_WAITING:
917 // if SELECTED == FALSE return to DETACH state
918 if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED
919 port->sm_vars &= ~AD_PORT_READY_N;
920 // in order to withhold the Selection Logic to check all ports READY_N value
921 // every callback cycle to update ready variable, we check READY_N and update READY here
922 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
923 port->sm_mux_state = AD_MUX_DETACHED; // next state
924 break;
925 }
926
927 // check if the wait_while_timer expired
Bandan Das7bfc4752010-10-16 20:19:59 +0000928 if (port->sm_mux_timer_counter
929 && !(--port->sm_mux_timer_counter))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 port->sm_vars |= AD_PORT_READY_N;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931
932 // in order to withhold the selection logic to check all ports READY_N value
933 // every callback cycle to update ready variable, we check READY_N and update READY here
934 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
935
936 // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state
Bandan Das7bfc4752010-10-16 20:19:59 +0000937 if ((port->sm_vars & AD_PORT_READY)
938 && !port->sm_mux_timer_counter)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 port->sm_mux_state = AD_MUX_ATTACHED; // next state
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 break;
941 case AD_MUX_ATTACHED:
942 // check also if agg_select_timer expired(so the edable port will take place only after this timer)
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -0800943 if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state
945 } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY
946 port->sm_vars &= ~AD_PORT_READY_N;
947 // in order to withhold the selection logic to check all ports READY_N value
948 // every callback cycle to update ready variable, we check READY_N and update READY here
949 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
950 port->sm_mux_state = AD_MUX_DETACHED;// next state
951 }
952 break;
953 case AD_MUX_COLLECTING_DISTRIBUTING:
954 if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) ||
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -0800955 !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 ) {
957 port->sm_mux_state = AD_MUX_ATTACHED;// next state
958
959 } else {
960 // if port state hasn't changed make
961 // sure that a collecting distributing
962 // port in an active aggregator is enabled
963 if (port->aggregator &&
964 port->aggregator->is_active &&
965 !__port_is_enabled(port)) {
966
967 __enable_port(port);
968 }
969 }
970 break;
971 default: //to silence the compiler
972 break;
973 }
974 }
975
976 // check if the state machine was changed
977 if (port->sm_mux_state != last_state) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800978 pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n",
979 port->actor_port_number, last_state,
980 port->sm_mux_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 switch (port->sm_mux_state) {
982 case AD_MUX_DETACHED:
983 __detach_bond_from_agg(port);
984 port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION;
985 ad_disable_collecting_distributing(port);
986 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
987 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
Holger Eitzenbergerd238d452008-12-26 11:18:15 -0800988 port->ntt = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 break;
990 case AD_MUX_WAITING:
991 port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0);
992 break;
993 case AD_MUX_ATTACHED:
994 __attach_bond_to_agg(port);
995 port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION;
996 port->actor_oper_port_state &= ~AD_STATE_COLLECTING;
997 port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING;
998 ad_disable_collecting_distributing(port);
Holger Eitzenbergerd238d452008-12-26 11:18:15 -0800999 port->ntt = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 break;
1001 case AD_MUX_COLLECTING_DISTRIBUTING:
1002 port->actor_oper_port_state |= AD_STATE_COLLECTING;
1003 port->actor_oper_port_state |= AD_STATE_DISTRIBUTING;
1004 ad_enable_collecting_distributing(port);
Holger Eitzenbergerd238d452008-12-26 11:18:15 -08001005 port->ntt = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 break;
1007 default: //to silence the compiler
1008 break;
1009 }
1010 }
1011}
1012
1013/**
1014 * ad_rx_machine - handle a port's rx State Machine
1015 * @lacpdu: the lacpdu we've received
1016 * @port: the port we're looking at
1017 *
1018 * If lacpdu arrived, stop previous timer (if exists) and set the next state as
1019 * CURRENT. If timer expired set the state machine in the proper state.
1020 * In other cases, this function checks if we need to switch to other state.
1021 */
1022static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
1023{
1024 rx_states_t last_state;
1025
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 // keep current State Machine state to compare later if it was changed
1027 last_state = port->sm_rx_state;
1028
1029 // check if state machine should change state
1030 // first, check if port was reinitialized
Bandan Das7bfc4752010-10-16 20:19:59 +00001031 if (port->sm_vars & AD_PORT_BEGIN)
1032 /* next state */
1033 port->sm_rx_state = AD_RX_INITIALIZE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 // check if port is not enabled
Bandan Das7bfc4752010-10-16 20:19:59 +00001035 else if (!(port->sm_vars & AD_PORT_BEGIN)
1036 && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED))
1037 /* next state */
1038 port->sm_rx_state = AD_RX_PORT_DISABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 // check if new lacpdu arrived
1040 else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) {
1041 port->sm_rx_timer_counter = 0; // zero timer
1042 port->sm_rx_state = AD_RX_CURRENT;
1043 } else {
1044 // if timer is on, and if it is expired
1045 if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) {
1046 switch (port->sm_rx_state) {
1047 case AD_RX_EXPIRED:
1048 port->sm_rx_state = AD_RX_DEFAULTED; // next state
1049 break;
1050 case AD_RX_CURRENT:
1051 port->sm_rx_state = AD_RX_EXPIRED; // next state
1052 break;
1053 default: //to silence the compiler
1054 break;
1055 }
1056 } else {
1057 // if no lacpdu arrived and no timer is on
1058 switch (port->sm_rx_state) {
1059 case AD_RX_PORT_DISABLED:
Bandan Das7bfc4752010-10-16 20:19:59 +00001060 if (port->sm_vars & AD_PORT_MOVED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 port->sm_rx_state = AD_RX_INITIALIZE; // next state
Bandan Das7bfc4752010-10-16 20:19:59 +00001062 else if (port->is_enabled
1063 && (port->sm_vars
1064 & AD_PORT_LACP_ENABLED))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 port->sm_rx_state = AD_RX_EXPIRED; // next state
Bandan Das7bfc4752010-10-16 20:19:59 +00001066 else if (port->is_enabled
1067 && ((port->sm_vars
1068 & AD_PORT_LACP_ENABLED) == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 port->sm_rx_state = AD_RX_LACP_DISABLED; // next state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 break;
1071 default: //to silence the compiler
1072 break;
1073
1074 }
1075 }
1076 }
1077
1078 // check if the State machine was changed or new lacpdu arrived
1079 if ((port->sm_rx_state != last_state) || (lacpdu)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001080 pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n",
1081 port->actor_port_number, last_state,
1082 port->sm_rx_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 switch (port->sm_rx_state) {
1084 case AD_RX_INITIALIZE:
Bandan Das7bfc4752010-10-16 20:19:59 +00001085 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
Bandan Das7bfc4752010-10-16 20:19:59 +00001087 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 port->sm_vars |= AD_PORT_LACP_ENABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 port->sm_vars &= ~AD_PORT_SELECTED;
1090 __record_default(port);
1091 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1092 port->sm_vars &= ~AD_PORT_MOVED;
1093 port->sm_rx_state = AD_RX_PORT_DISABLED; // next state
1094
1095 /*- Fall Through -*/
1096
1097 case AD_RX_PORT_DISABLED:
1098 port->sm_vars &= ~AD_PORT_MATCHED;
1099 break;
1100 case AD_RX_LACP_DISABLED:
1101 port->sm_vars &= ~AD_PORT_SELECTED;
1102 __record_default(port);
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -08001103 port->partner_oper.port_state &= ~AD_STATE_AGGREGATION;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 port->sm_vars |= AD_PORT_MATCHED;
1105 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1106 break;
1107 case AD_RX_EXPIRED:
1108 //Reset of the Synchronization flag. (Standard 43.4.12)
1109 //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the
1110 //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port.
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -08001111 port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 port->sm_vars &= ~AD_PORT_MATCHED;
Julia Lawall8e321c42009-07-11 10:03:55 +00001113 port->partner_oper.port_state |=
1114 AD_STATE_LACP_ACTIVITY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT));
1116 port->actor_oper_port_state |= AD_STATE_EXPIRED;
1117 break;
1118 case AD_RX_DEFAULTED:
1119 __update_default_selected(port);
1120 __record_default(port);
1121 port->sm_vars |= AD_PORT_MATCHED;
1122 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1123 break;
1124 case AD_RX_CURRENT:
1125 // detect loopback situation
1126 if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) {
1127 // INFO_RECEIVED_LOOPBACK_FRAMES
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001128 pr_err("%s: An illegal loopback occurred on adapter (%s).\n"
1129 "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n",
Mitch Williams4e0952c2005-11-09 10:34:57 -08001130 port->slave->dev->master->name, port->slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 return;
1132 }
1133 __update_selected(lacpdu, port);
1134 __update_ntt(lacpdu, port);
1135 __record_pdu(lacpdu, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT));
1137 port->actor_oper_port_state &= ~AD_STATE_EXPIRED;
1138 // verify that if the aggregator is enabled, the port is enabled too.
1139 //(because if the link goes down for a short time, the 802.3ad will not
1140 // catch it, and the port will continue to be disabled)
Bandan Das7bfc4752010-10-16 20:19:59 +00001141 if (port->aggregator
1142 && port->aggregator->is_active
1143 && !__port_is_enabled(port))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 __enable_port(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 break;
1146 default: //to silence the compiler
1147 break;
1148 }
1149 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150}
1151
1152/**
1153 * ad_tx_machine - handle a port's tx state machine
1154 * @port: the port we're looking at
1155 *
1156 */
1157static void ad_tx_machine(struct port *port)
1158{
1159 // check if tx timer expired, to verify that we do not send more than 3 packets per second
1160 if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) {
1161 // check if there is something to send
1162 if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) {
1163 __update_lacpdu_from_port(port);
Holger Eitzenbergerd238d452008-12-26 11:18:15 -08001164
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 if (ad_lacpdu_send(port) >= 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001166 pr_debug("Sent LACPDU on port %d\n",
1167 port->actor_port_number);
Holger Eitzenbergerd238d452008-12-26 11:18:15 -08001168
1169 /* mark ntt as false, so it will not be sent again until
1170 demanded */
1171 port->ntt = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172 }
1173 }
1174 // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND
Bandan Das128ea6c2010-10-16 20:19:58 +00001175 port->sm_tx_timer_counter =
1176 ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 }
1178}
1179
1180/**
1181 * ad_periodic_machine - handle a port's periodic state machine
1182 * @port: the port we're looking at
1183 *
1184 * Turn ntt flag on priodically to perform periodic transmission of lacpdu's.
1185 */
1186static void ad_periodic_machine(struct port *port)
1187{
1188 periodic_states_t last_state;
1189
1190 // keep current state machine state to compare later if it was changed
1191 last_state = port->sm_periodic_state;
1192
1193 // check if port was reinitialized
1194 if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) ||
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -08001195 (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001196 ) {
1197 port->sm_periodic_state = AD_NO_PERIODIC; // next state
1198 }
1199 // check if state machine should change state
1200 else if (port->sm_periodic_timer_counter) {
1201 // check if periodic state machine expired
1202 if (!(--port->sm_periodic_timer_counter)) {
1203 // if expired then do tx
1204 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1205 } else {
1206 // If not expired, check if there is some new timeout parameter from the partner state
1207 switch (port->sm_periodic_state) {
1208 case AD_FAST_PERIODIC:
Bandan Das7bfc4752010-10-16 20:19:59 +00001209 if (!(port->partner_oper.port_state
1210 & AD_STATE_LACP_TIMEOUT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 break;
1213 case AD_SLOW_PERIODIC:
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -08001214 if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 // stop current timer
1216 port->sm_periodic_timer_counter = 0;
1217 port->sm_periodic_state = AD_PERIODIC_TX; // next state
1218 }
1219 break;
1220 default: //to silence the compiler
1221 break;
1222 }
1223 }
1224 } else {
1225 switch (port->sm_periodic_state) {
1226 case AD_NO_PERIODIC:
1227 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
1228 break;
1229 case AD_PERIODIC_TX:
Bandan Das7bfc4752010-10-16 20:19:59 +00001230 if (!(port->partner_oper.port_state
1231 & AD_STATE_LACP_TIMEOUT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001232 port->sm_periodic_state = AD_SLOW_PERIODIC; // next state
Bandan Das7bfc4752010-10-16 20:19:59 +00001233 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 port->sm_periodic_state = AD_FAST_PERIODIC; // next state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 break;
1236 default: //to silence the compiler
1237 break;
1238 }
1239 }
1240
1241 // check if the state machine was changed
1242 if (port->sm_periodic_state != last_state) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001243 pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n",
1244 port->actor_port_number, last_state,
1245 port->sm_periodic_state);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246 switch (port->sm_periodic_state) {
1247 case AD_NO_PERIODIC:
1248 port->sm_periodic_timer_counter = 0; // zero timer
1249 break;
1250 case AD_FAST_PERIODIC:
1251 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1252 break;
1253 case AD_SLOW_PERIODIC:
1254 port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle
1255 break;
1256 case AD_PERIODIC_TX:
Holger Eitzenbergerd238d452008-12-26 11:18:15 -08001257 port->ntt = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 break;
1259 default: //to silence the compiler
1260 break;
1261 }
1262 }
1263}
1264
1265/**
1266 * ad_port_selection_logic - select aggregation groups
1267 * @port: the port we're looking at
1268 *
1269 * Select aggregation groups, and assign each port for it's aggregetor. The
1270 * selection logic is called in the inititalization (after all the handshkes),
1271 * and after every lacpdu receive (if selected is off).
1272 */
1273static void ad_port_selection_logic(struct port *port)
1274{
1275 struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator;
1276 struct port *last_port = NULL, *curr_port;
1277 int found = 0;
1278
1279 // if the port is already Selected, do nothing
Bandan Das7bfc4752010-10-16 20:19:59 +00001280 if (port->sm_vars & AD_PORT_SELECTED)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282
1283 // if the port is connected to other aggregator, detach it
1284 if (port->aggregator) {
1285 // detach the port from its former aggregator
Bandan Das128ea6c2010-10-16 20:19:58 +00001286 temp_aggregator = port->aggregator;
1287 for (curr_port = temp_aggregator->lag_ports; curr_port;
1288 last_port = curr_port,
1289 curr_port = curr_port->next_port_in_aggregator) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 if (curr_port == port) {
1291 temp_aggregator->num_of_ports--;
1292 if (!last_port) {// if it is the first port attached to the aggregator
Bandan Das128ea6c2010-10-16 20:19:58 +00001293 temp_aggregator->lag_ports =
1294 port->next_port_in_aggregator;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 } else {// not the first port attached to the aggregator
Bandan Das128ea6c2010-10-16 20:19:58 +00001296 last_port->next_port_in_aggregator =
1297 port->next_port_in_aggregator;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298 }
1299
1300 // clear the port's relations to this aggregator
1301 port->aggregator = NULL;
Bandan Das128ea6c2010-10-16 20:19:58 +00001302 port->next_port_in_aggregator = NULL;
1303 port->actor_port_aggregator_identifier = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001305 pr_debug("Port %d left LAG %d\n",
1306 port->actor_port_number,
1307 temp_aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 // if the aggregator is empty, clear its parameters, and set it ready to be attached
Bandan Das7bfc4752010-10-16 20:19:59 +00001309 if (!temp_aggregator->lag_ports)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310 ad_clear_agg(temp_aggregator);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 break;
1312 }
1313 }
1314 if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001315 pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00001316 port->slave->dev->master->name,
1317 port->actor_port_number,
1318 port->slave->dev->name,
1319 port->aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 }
1321 }
1322 // search on all aggregators for a suitable aggregator for this port
1323 for (aggregator = __get_first_agg(port); aggregator;
1324 aggregator = __get_next_agg(aggregator)) {
1325
1326 // keep a free aggregator for later use(if needed)
1327 if (!aggregator->lag_ports) {
Bandan Das7bfc4752010-10-16 20:19:59 +00001328 if (!free_aggregator)
Bandan Das128ea6c2010-10-16 20:19:58 +00001329 free_aggregator = aggregator;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 continue;
1331 }
1332 // check if current aggregator suits us
1333 if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -08001334 !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) &&
1335 (aggregator->partner_system_priority == port->partner_oper.system_priority) &&
1336 (aggregator->partner_oper_aggregator_key == port->partner_oper.key)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 ) &&
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -08001338 ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 !aggregator->is_individual) // but is not individual OR
1340 )
1341 ) {
1342 // attach to the founded aggregator
1343 port->aggregator = aggregator;
Bandan Das128ea6c2010-10-16 20:19:58 +00001344 port->actor_port_aggregator_identifier =
1345 port->aggregator->aggregator_identifier;
1346 port->next_port_in_aggregator = aggregator->lag_ports;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001347 port->aggregator->num_of_ports++;
Bandan Das128ea6c2010-10-16 20:19:58 +00001348 aggregator->lag_ports = port;
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001349 pr_debug("Port %d joined LAG %d(existing LAG)\n",
1350 port->actor_port_number,
1351 port->aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352
1353 // mark this port as selected
1354 port->sm_vars |= AD_PORT_SELECTED;
1355 found = 1;
1356 break;
1357 }
1358 }
1359
1360 // the port couldn't find an aggregator - attach it to a new aggregator
1361 if (!found) {
1362 if (free_aggregator) {
1363 // assign port a new aggregator
1364 port->aggregator = free_aggregator;
Bandan Das128ea6c2010-10-16 20:19:58 +00001365 port->actor_port_aggregator_identifier =
1366 port->aggregator->aggregator_identifier;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
1368 // update the new aggregator's parameters
1369 // if port was responsed from the end-user
Bandan Das7bfc4752010-10-16 20:19:59 +00001370 if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)
1371 /* if port is full duplex */
Holger Eitzenberger1624db72008-12-26 13:27:21 -08001372 port->aggregator->is_individual = false;
Bandan Das7bfc4752010-10-16 20:19:59 +00001373 else
Holger Eitzenberger1624db72008-12-26 13:27:21 -08001374 port->aggregator->is_individual = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375
1376 port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key;
1377 port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key;
Bandan Das128ea6c2010-10-16 20:19:58 +00001378 port->aggregator->partner_system =
1379 port->partner_oper.system;
1380 port->aggregator->partner_system_priority =
1381 port->partner_oper.system_priority;
Holger Eitzenberger1055c9a2008-12-17 19:07:38 -08001382 port->aggregator->partner_oper_aggregator_key = port->partner_oper.key;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383 port->aggregator->receive_state = 1;
1384 port->aggregator->transmit_state = 1;
1385 port->aggregator->lag_ports = port;
1386 port->aggregator->num_of_ports++;
1387
1388 // mark this port as selected
1389 port->sm_vars |= AD_PORT_SELECTED;
1390
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001391 pr_debug("Port %d joined LAG %d(new LAG)\n",
1392 port->actor_port_number,
1393 port->aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001395 pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n",
Mitch Williams4e0952c2005-11-09 10:34:57 -08001396 port->slave->dev->master->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001397 port->actor_port_number, port->slave->dev->name);
1398 }
1399 }
1400 // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports
1401 // else set ready=FALSE in all aggregator's ports
1402 __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator));
1403
Jay Vosburghfd989c82008-11-04 17:51:16 -08001404 aggregator = __get_first_agg(port);
1405 ad_agg_selection_logic(aggregator);
1406}
1407
1408/*
1409 * Decide if "agg" is a better choice for the new active aggregator that
1410 * the current best, according to the ad_select policy.
1411 */
1412static struct aggregator *ad_agg_selection_test(struct aggregator *best,
1413 struct aggregator *curr)
1414{
1415 /*
1416 * 0. If no best, select current.
1417 *
1418 * 1. If the current agg is not individual, and the best is
1419 * individual, select current.
1420 *
1421 * 2. If current agg is individual and the best is not, keep best.
1422 *
1423 * 3. Therefore, current and best are both individual or both not
1424 * individual, so:
1425 *
1426 * 3a. If current agg partner replied, and best agg partner did not,
1427 * select current.
1428 *
1429 * 3b. If current agg partner did not reply and best agg partner
1430 * did reply, keep best.
1431 *
1432 * 4. Therefore, current and best both have partner replies or
1433 * both do not, so perform selection policy:
1434 *
1435 * BOND_AD_COUNT: Select by count of ports. If count is equal,
1436 * select by bandwidth.
1437 *
1438 * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth.
1439 */
1440 if (!best)
1441 return curr;
1442
1443 if (!curr->is_individual && best->is_individual)
1444 return curr;
1445
1446 if (curr->is_individual && !best->is_individual)
1447 return best;
1448
1449 if (__agg_has_partner(curr) && !__agg_has_partner(best))
1450 return curr;
1451
1452 if (!__agg_has_partner(curr) && __agg_has_partner(best))
1453 return best;
1454
1455 switch (__get_agg_selection_mode(curr->lag_ports)) {
1456 case BOND_AD_COUNT:
1457 if (curr->num_of_ports > best->num_of_ports)
1458 return curr;
1459
1460 if (curr->num_of_ports < best->num_of_ports)
1461 return best;
1462
1463 /*FALLTHROUGH*/
1464 case BOND_AD_STABLE:
1465 case BOND_AD_BANDWIDTH:
1466 if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
1467 return curr;
1468
1469 break;
1470
1471 default:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001472 pr_warning("%s: Impossible agg select mode %d\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00001473 curr->slave->dev->master->name,
1474 __get_agg_selection_mode(curr->lag_ports));
Jay Vosburghfd989c82008-11-04 17:51:16 -08001475 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 }
Jay Vosburghfd989c82008-11-04 17:51:16 -08001477
1478 return best;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479}
1480
Stephen Hemminger4cd6fe12009-05-15 08:44:32 +00001481static int agg_device_up(const struct aggregator *agg)
1482{
Jiri Bohac2430af82011-04-19 02:09:55 +00001483 struct port *port = agg->lag_ports;
1484 if (!port)
1485 return 0;
1486 return (netif_running(port->slave->dev) &&
1487 netif_carrier_ok(port->slave->dev));
Stephen Hemminger4cd6fe12009-05-15 08:44:32 +00001488}
1489
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490/**
1491 * ad_agg_selection_logic - select an aggregation group for a team
1492 * @aggregator: the aggregator we're looking at
1493 *
1494 * It is assumed that only one aggregator may be selected for a team.
Jay Vosburghfd989c82008-11-04 17:51:16 -08001495 *
1496 * The logic of this function is to select the aggregator according to
1497 * the ad_select policy:
1498 *
1499 * BOND_AD_STABLE: select the aggregator with the most ports attached to
1500 * it, and to reselect the active aggregator only if the previous
1501 * aggregator has no more ports related to it.
1502 *
1503 * BOND_AD_BANDWIDTH: select the aggregator with the highest total
1504 * bandwidth, and reselect whenever a link state change takes place or the
1505 * set of slaves in the bond changes.
1506 *
1507 * BOND_AD_COUNT: select the aggregator with largest number of ports
1508 * (slaves), and reselect whenever a link state change takes place or the
1509 * set of slaves in the bond changes.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001510 *
1511 * FIXME: this function MUST be called with the first agg in the bond, or
1512 * __get_active_agg() won't work correctly. This function should be better
1513 * called with the bond itself, and retrieve the first agg from it.
1514 */
Jay Vosburghfd989c82008-11-04 17:51:16 -08001515static void ad_agg_selection_logic(struct aggregator *agg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516{
Jay Vosburghfd989c82008-11-04 17:51:16 -08001517 struct aggregator *best, *active, *origin;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518 struct port *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519
Jay Vosburghfd989c82008-11-04 17:51:16 -08001520 origin = agg;
Jay Vosburghfd989c82008-11-04 17:51:16 -08001521 active = __get_active_agg(agg);
Stephen Hemminger4cd6fe12009-05-15 08:44:32 +00001522 best = (active && agg_device_up(active)) ? active : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 do {
Jay Vosburghfd989c82008-11-04 17:51:16 -08001525 agg->is_active = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526
Stephen Hemminger4cd6fe12009-05-15 08:44:32 +00001527 if (agg->num_of_ports && agg_device_up(agg))
Jay Vosburghfd989c82008-11-04 17:51:16 -08001528 best = ad_agg_selection_test(best, agg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
Jay Vosburghfd989c82008-11-04 17:51:16 -08001530 } while ((agg = __get_next_agg(agg)));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001531
Jay Vosburghfd989c82008-11-04 17:51:16 -08001532 if (best &&
1533 __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) {
1534 /*
1535 * For the STABLE policy, don't replace the old active
1536 * aggregator if it's still active (it has an answering
1537 * partner) or if both the best and active don't have an
1538 * answering partner.
1539 */
1540 if (active && active->lag_ports &&
1541 active->lag_ports->is_enabled &&
1542 (__agg_has_partner(active) ||
1543 (!__agg_has_partner(active) && !__agg_has_partner(best)))) {
1544 if (!(!active->actor_oper_aggregator_key &&
1545 best->actor_oper_aggregator_key)) {
1546 best = NULL;
1547 active->is_active = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001548 }
1549 }
1550 }
1551
Jay Vosburghfd989c82008-11-04 17:51:16 -08001552 if (best && (best == active)) {
1553 best = NULL;
1554 active->is_active = 1;
1555 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556
Jay Vosburghfd989c82008-11-04 17:51:16 -08001557 // if there is new best aggregator, activate it
1558 if (best) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001559 pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001560 best->aggregator_identifier, best->num_of_ports,
1561 best->actor_oper_aggregator_key,
1562 best->partner_oper_aggregator_key,
1563 best->is_individual, best->is_active);
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001564 pr_debug("best ports %p slave %p %s\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001565 best->lag_ports, best->slave,
1566 best->slave ? best->slave->dev->name : "NULL");
Jay Vosburghfd989c82008-11-04 17:51:16 -08001567
1568 for (agg = __get_first_agg(best->lag_ports); agg;
1569 agg = __get_next_agg(agg)) {
1570
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001571 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001572 agg->aggregator_identifier, agg->num_of_ports,
1573 agg->actor_oper_aggregator_key,
1574 agg->partner_oper_aggregator_key,
1575 agg->is_individual, agg->is_active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001576 }
1577
1578 // check if any partner replys
Jay Vosburghfd989c82008-11-04 17:51:16 -08001579 if (best->is_individual) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001580 pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n",
Dan Carpenterc99a3d22009-12-23 03:27:10 +00001581 best->slave ? best->slave->dev->master->name : "NULL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001582 }
1583
Jay Vosburghfd989c82008-11-04 17:51:16 -08001584 best->is_active = 1;
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001585 pr_debug("LAG %d chosen as the active LAG\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001586 best->aggregator_identifier);
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001587 pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001588 best->aggregator_identifier, best->num_of_ports,
1589 best->actor_oper_aggregator_key,
1590 best->partner_oper_aggregator_key,
1591 best->is_individual, best->is_active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592
1593 // disable the ports that were related to the former active_aggregator
Jay Vosburghfd989c82008-11-04 17:51:16 -08001594 if (active) {
1595 for (port = active->lag_ports; port;
1596 port = port->next_port_in_aggregator) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597 __disable_port(port);
1598 }
1599 }
1600 }
1601
Jay Vosburghfd989c82008-11-04 17:51:16 -08001602 /*
1603 * if the selected aggregator is of join individuals
1604 * (partner_system is NULL), enable their ports
1605 */
1606 active = __get_active_agg(origin);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607
Jay Vosburghfd989c82008-11-04 17:51:16 -08001608 if (active) {
1609 if (!__agg_has_partner(active)) {
1610 for (port = active->lag_ports; port;
1611 port = port->next_port_in_aggregator) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612 __enable_port(port);
1613 }
1614 }
1615 }
Jay Vosburghfd989c82008-11-04 17:51:16 -08001616
1617 if (origin->slave) {
1618 struct bonding *bond;
1619
1620 bond = bond_get_bond_by_slave(origin->slave);
1621 if (bond)
1622 bond_3ad_set_carrier(bond);
1623 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624}
1625
1626/**
1627 * ad_clear_agg - clear a given aggregator's parameters
1628 * @aggregator: the aggregator we're looking at
1629 *
1630 */
1631static void ad_clear_agg(struct aggregator *aggregator)
1632{
1633 if (aggregator) {
Holger Eitzenberger1624db72008-12-26 13:27:21 -08001634 aggregator->is_individual = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001635 aggregator->actor_admin_aggregator_key = 0;
1636 aggregator->actor_oper_aggregator_key = 0;
1637 aggregator->partner_system = null_mac_addr;
1638 aggregator->partner_system_priority = 0;
1639 aggregator->partner_oper_aggregator_key = 0;
1640 aggregator->receive_state = 0;
1641 aggregator->transmit_state = 0;
1642 aggregator->lag_ports = NULL;
1643 aggregator->is_active = 0;
1644 aggregator->num_of_ports = 0;
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001645 pr_debug("LAG %d was cleared\n",
1646 aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001647 }
1648}
1649
1650/**
1651 * ad_initialize_agg - initialize a given aggregator's parameters
1652 * @aggregator: the aggregator we're looking at
1653 *
1654 */
1655static void ad_initialize_agg(struct aggregator *aggregator)
1656{
1657 if (aggregator) {
1658 ad_clear_agg(aggregator);
1659
1660 aggregator->aggregator_mac_address = null_mac_addr;
1661 aggregator->aggregator_identifier = 0;
1662 aggregator->slave = NULL;
1663 }
1664}
1665
1666/**
1667 * ad_initialize_port - initialize a given port's parameters
1668 * @aggregator: the aggregator we're looking at
1669 * @lacp_fast: boolean. whether fast periodic should be used
1670 *
1671 */
1672static void ad_initialize_port(struct port *port, int lacp_fast)
1673{
Holger Eitzenbergerc7e703d2008-12-17 19:12:07 -08001674 static const struct port_params tmpl = {
1675 .system_priority = 0xffff,
1676 .key = 1,
1677 .port_number = 1,
1678 .port_priority = 0xff,
1679 .port_state = 1,
1680 };
Holger Eitzenberger7addeef2008-12-26 13:28:33 -08001681 static const struct lacpdu lacpdu = {
1682 .subtype = 0x01,
1683 .version_number = 0x01,
1684 .tlv_type_actor_info = 0x01,
1685 .actor_information_length = 0x14,
1686 .tlv_type_partner_info = 0x02,
1687 .partner_information_length = 0x14,
1688 .tlv_type_collector_info = 0x03,
1689 .collector_information_length = 0x10,
1690 .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY),
1691 };
Holger Eitzenbergerc7e703d2008-12-17 19:12:07 -08001692
Linus Torvalds1da177e2005-04-16 15:20:36 -07001693 if (port) {
1694 port->actor_port_number = 1;
1695 port->actor_port_priority = 0xff;
1696 port->actor_system = null_mac_addr;
1697 port->actor_system_priority = 0xffff;
1698 port->actor_port_aggregator_identifier = 0;
Holger Eitzenbergerd238d452008-12-26 11:18:15 -08001699 port->ntt = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 port->actor_admin_port_key = 1;
1701 port->actor_oper_port_key = 1;
1702 port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1703 port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY;
1704
Bandan Das7bfc4752010-10-16 20:19:59 +00001705 if (lacp_fast)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001707
Holger Eitzenbergerc7e703d2008-12-17 19:12:07 -08001708 memcpy(&port->partner_admin, &tmpl, sizeof(tmpl));
1709 memcpy(&port->partner_oper, &tmpl, sizeof(tmpl));
1710
Holger Eitzenbergerf48127b2008-12-26 13:26:54 -08001711 port->is_enabled = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712 // ****** private parameters ******
1713 port->sm_vars = 0x3;
1714 port->sm_rx_state = 0;
1715 port->sm_rx_timer_counter = 0;
1716 port->sm_periodic_state = 0;
1717 port->sm_periodic_timer_counter = 0;
1718 port->sm_mux_state = 0;
1719 port->sm_mux_timer_counter = 0;
1720 port->sm_tx_state = 0;
1721 port->sm_tx_timer_counter = 0;
1722 port->slave = NULL;
1723 port->aggregator = NULL;
1724 port->next_port_in_aggregator = NULL;
1725 port->transaction_id = 0;
1726
Holger Eitzenberger7addeef2008-12-26 13:28:33 -08001727 memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 }
1729}
1730
1731/**
1732 * ad_enable_collecting_distributing - enable a port's transmit/receive
1733 * @port: the port we're looking at
1734 *
1735 * Enable @port if it's in an active aggregator
1736 */
1737static void ad_enable_collecting_distributing(struct port *port)
1738{
1739 if (port->aggregator->is_active) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001740 pr_debug("Enabling port %d(LAG %d)\n",
1741 port->actor_port_number,
1742 port->aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 __enable_port(port);
1744 }
1745}
1746
1747/**
1748 * ad_disable_collecting_distributing - disable a port's transmit/receive
1749 * @port: the port we're looking at
1750 *
1751 */
1752static void ad_disable_collecting_distributing(struct port *port)
1753{
1754 if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001755 pr_debug("Disabling port %d(LAG %d)\n",
1756 port->actor_port_number,
1757 port->aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758 __disable_port(port);
1759 }
1760}
1761
1762#if 0
1763/**
1764 * ad_marker_info_send - send a marker information frame
1765 * @port: the port we're looking at
1766 *
1767 * This function does nothing since we decided not to implement send and handle
1768 * response for marker PDU's, in this stage, but only to respond to marker
1769 * information.
1770 */
1771static void ad_marker_info_send(struct port *port)
1772{
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07001773 struct bond_marker marker;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 u16 index;
1775
1776 // fill the marker PDU with the appropriate values
1777 marker.subtype = 0x02;
1778 marker.version_number = 0x01;
1779 marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE;
1780 marker.marker_length = 0x16;
1781 // convert requester_port to Big Endian
1782 marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8));
1783 marker.requester_system = port->actor_system;
1784 // convert requester_port(u32) to Big Endian
Bandan Das128ea6c2010-10-16 20:19:58 +00001785 marker.requester_transaction_id =
1786 (((++port->transaction_id & 0xFF) << 24)
1787 | ((port->transaction_id & 0xFF00) << 8)
1788 | ((port->transaction_id & 0xFF0000) >> 8)
1789 | ((port->transaction_id & 0xFF000000) >> 24));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 marker.pad = 0;
1791 marker.tlv_type_terminator = 0x00;
1792 marker.terminator_length = 0x00;
Bandan Das128ea6c2010-10-16 20:19:58 +00001793 for (index = 0; index < 90; index++)
1794 marker.reserved_90[index] = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795
1796 // send the marker information
1797 if (ad_marker_send(port, &marker) >= 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001798 pr_debug("Sent Marker Information on port %d\n",
1799 port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800 }
1801}
1802#endif
1803
1804/**
1805 * ad_marker_info_received - handle receive of a Marker information frame
1806 * @marker_info: Marker info received
1807 * @port: the port we're looking at
1808 *
1809 */
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07001810static void ad_marker_info_received(struct bond_marker *marker_info,
1811 struct port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812{
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07001813 struct bond_marker marker;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814
1815 // copy the received marker data to the response marker
1816 //marker = *marker_info;
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07001817 memcpy(&marker, marker_info, sizeof(struct bond_marker));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001818 // change the marker subtype to marker response
Bandan Das128ea6c2010-10-16 20:19:58 +00001819 marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001820 // send the marker response
1821
1822 if (ad_marker_send(port, &marker) >= 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001823 pr_debug("Sent Marker Response on port %d\n",
1824 port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825 }
1826}
1827
1828/**
1829 * ad_marker_response_received - handle receive of a marker response frame
1830 * @marker: marker PDU received
1831 * @port: the port we're looking at
1832 *
1833 * This function does nothing since we decided not to implement send and handle
1834 * response for marker PDU's, in this stage, but only to respond to marker
1835 * information.
1836 */
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07001837static void ad_marker_response_received(struct bond_marker *marker,
1838 struct port *port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839{
Bandan Das128ea6c2010-10-16 20:19:58 +00001840 marker = NULL; /* just to satisfy the compiler */
1841 port = NULL; /* just to satisfy the compiler */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW
1843}
1844
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845//////////////////////////////////////////////////////////////////////////////////////
1846// ================= AD exported functions to the main bonding code ==================
1847//////////////////////////////////////////////////////////////////////////////////////
1848
1849// Check aggregators status in team every T seconds
1850#define AD_AGGREGATOR_SELECTION_TIMER 8
1851
Jay Vosburghfd989c82008-11-04 17:51:16 -08001852/*
1853 * bond_3ad_initiate_agg_selection(struct bonding *bond)
1854 *
1855 * Set the aggregation selection timer, to initiate an agg selection in
1856 * the very near future. Called during first initialization, and during
1857 * any down to up transitions of the bond.
1858 */
1859void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout)
1860{
1861 BOND_AD_INFO(bond).agg_select_timer = timeout;
1862 BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select;
1863}
1864
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865static u16 aggregator_identifier;
1866
1867/**
1868 * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures
1869 * @bond: bonding struct to work on
1870 * @tick_resolution: tick duration (millisecond resolution)
1871 * @lacp_fast: boolean. whether fast periodic should be used
1872 *
1873 * Can be called only after the mac address of the bond is set.
1874 */
1875void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast)
Jiri Pirko3a6d54c2009-05-11 23:37:15 +00001876{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001877 // check that the bond is not initialized yet
Jiri Pirko3a6d54c2009-05-11 23:37:15 +00001878 if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr),
1879 bond->dev->dev_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880
1881 aggregator_identifier = 0;
1882
1883 BOND_AD_INFO(bond).lacp_fast = lacp_fast;
1884 BOND_AD_INFO(bond).system.sys_priority = 0xFFFF;
1885 BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr);
1886
1887 // initialize how many times this module is called in one second(should be about every 100ms)
1888 ad_ticks_per_sec = tick_resolution;
1889
Jay Vosburghfd989c82008-11-04 17:51:16 -08001890 bond_3ad_initiate_agg_selection(bond,
1891 AD_AGGREGATOR_SELECTION_TIMER *
1892 ad_ticks_per_sec);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001893 }
1894}
1895
1896/**
1897 * bond_3ad_bind_slave - initialize a slave's port
1898 * @slave: slave struct to work on
1899 *
1900 * Returns: 0 on success
1901 * < 0 on error
1902 */
1903int bond_3ad_bind_slave(struct slave *slave)
1904{
1905 struct bonding *bond = bond_get_bond_by_slave(slave);
1906 struct port *port;
1907 struct aggregator *aggregator;
1908
1909 if (bond == NULL) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001910 pr_err("%s: The slave %s is not attached to its bond\n",
Mitch Williams4e0952c2005-11-09 10:34:57 -08001911 slave->dev->master->name, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912 return -1;
1913 }
1914
Uwe Kleine-Königb5950762010-11-01 15:38:34 -04001915 //check that the slave has not been initialized yet.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001916 if (SLAVE_AD_INFO(slave).port.slave != slave) {
1917
1918 // port initialization
1919 port = &(SLAVE_AD_INFO(slave).port);
1920
1921 ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast);
1922
1923 port->slave = slave;
1924 port->actor_port_number = SLAVE_AD_INFO(slave).id;
1925 // key is determined according to the link speed, duplex and user key(which is yet not supported)
1926 // ------------------------------------------------------------
1927 // Port key : | User key | Speed |Duplex|
1928 // ------------------------------------------------------------
1929 // 16 6 1 0
1930 port->actor_admin_port_key = 0; // initialize this parameter
1931 port->actor_admin_port_key |= __get_duplex(port);
1932 port->actor_admin_port_key |= (__get_link_speed(port) << 1);
1933 port->actor_oper_port_key = port->actor_admin_port_key;
1934 // if the port is not full duplex, then the port should be not lacp Enabled
Bandan Das7bfc4752010-10-16 20:19:59 +00001935 if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 port->sm_vars &= ~AD_PORT_LACP_ENABLED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 // actor system is the bond's system
1938 port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr;
1939 // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second)
1940 port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND;
1941 port->aggregator = NULL;
1942 port->next_port_in_aggregator = NULL;
1943
1944 __disable_port(port);
1945 __initialize_port_locks(port);
1946
1947
1948 // aggregator initialization
1949 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1950
1951 ad_initialize_agg(aggregator);
1952
1953 aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr);
1954 aggregator->aggregator_identifier = (++aggregator_identifier);
1955 aggregator->slave = slave;
1956 aggregator->is_active = 0;
1957 aggregator->num_of_ports = 0;
1958 }
1959
1960 return 0;
1961}
1962
1963/**
1964 * bond_3ad_unbind_slave - deinitialize a slave's port
1965 * @slave: slave struct to work on
1966 *
1967 * Search for the aggregator that is related to this port, remove the
1968 * aggregator and assign another aggregator for other port related to it
1969 * (if any), and remove the port.
1970 */
1971void bond_3ad_unbind_slave(struct slave *slave)
1972{
1973 struct port *port, *prev_port, *temp_port;
1974 struct aggregator *aggregator, *new_aggregator, *temp_aggregator;
1975 int select_new_active_agg = 0;
Jasper Spaansa361c832009-10-23 04:09:24 +00001976
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 // find the aggregator related to this slave
1978 aggregator = &(SLAVE_AD_INFO(slave).aggregator);
1979
1980 // find the port related to this slave
1981 port = &(SLAVE_AD_INFO(slave).port);
1982
1983 // if slave is null, the whole port is not initialized
1984 if (!port->slave) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001985 pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00001986 slave->dev->master->name, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001987 return;
1988 }
1989
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001990 pr_debug("Unbinding Link Aggregation Group %d\n",
1991 aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001992
1993 /* Tell the partner that this port is not suitable for aggregation */
1994 port->actor_oper_port_state &= ~AD_STATE_AGGREGATION;
1995 __update_lacpdu_from_port(port);
1996 ad_lacpdu_send(port);
1997
1998 // check if this aggregator is occupied
1999 if (aggregator->lag_ports) {
2000 // check if there are other ports related to this aggregator except
2001 // the port related to this slave(thats ensure us that there is a
2002 // reason to search for new aggregator, and that we will find one
2003 if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) {
2004 // find new aggregator for the related port(s)
2005 new_aggregator = __get_first_agg(port);
2006 for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) {
Anand Gadiyarfd589a82009-07-16 17:13:03 +02002007 // if the new aggregator is empty, or it is connected to our port only
Bandan Das7bfc4752010-10-16 20:19:59 +00002008 if (!new_aggregator->lag_ports
2009 || ((new_aggregator->lag_ports == port)
2010 && !new_aggregator->lag_ports->next_port_in_aggregator))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002011 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 }
2013 // if new aggregator found, copy the aggregator's parameters
2014 // and connect the related lag_ports to the new aggregator
2015 if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002016 pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n",
2017 aggregator->aggregator_identifier,
2018 new_aggregator->aggregator_identifier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002019
2020 if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002021 pr_info("%s: Removing an active aggregator\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002022 aggregator->slave->dev->master->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002023 // select new active aggregator
2024 select_new_active_agg = 1;
2025 }
2026
2027 new_aggregator->is_individual = aggregator->is_individual;
2028 new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key;
2029 new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key;
2030 new_aggregator->partner_system = aggregator->partner_system;
2031 new_aggregator->partner_system_priority = aggregator->partner_system_priority;
2032 new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key;
2033 new_aggregator->receive_state = aggregator->receive_state;
2034 new_aggregator->transmit_state = aggregator->transmit_state;
2035 new_aggregator->lag_ports = aggregator->lag_ports;
2036 new_aggregator->is_active = aggregator->is_active;
2037 new_aggregator->num_of_ports = aggregator->num_of_ports;
2038
2039 // update the information that is written on the ports about the aggregator
Bandan Das128ea6c2010-10-16 20:19:58 +00002040 for (temp_port = aggregator->lag_ports; temp_port;
2041 temp_port = temp_port->next_port_in_aggregator) {
2042 temp_port->aggregator = new_aggregator;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier;
2044 }
2045
2046 // clear the aggregator
2047 ad_clear_agg(aggregator);
Jasper Spaansa361c832009-10-23 04:09:24 +00002048
Bandan Das7bfc4752010-10-16 20:19:59 +00002049 if (select_new_active_agg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050 ad_agg_selection_logic(__get_first_agg(port));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002052 pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002053 slave->dev->master->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002054 }
2055 } else { // in case that the only port related to this aggregator is the one we want to remove
2056 select_new_active_agg = aggregator->is_active;
2057 // clear the aggregator
2058 ad_clear_agg(aggregator);
2059 if (select_new_active_agg) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002060 pr_info("%s: Removing an active aggregator\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002061 slave->dev->master->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002062 // select new active aggregator
2063 ad_agg_selection_logic(__get_first_agg(port));
2064 }
2065 }
2066 }
2067
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002068 pr_debug("Unbinding port %d\n", port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002069 // find the aggregator that this port is connected to
2070 temp_aggregator = __get_first_agg(port);
2071 for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) {
2072 prev_port = NULL;
2073 // search the port in the aggregator's related ports
Bandan Das128ea6c2010-10-16 20:19:58 +00002074 for (temp_port = temp_aggregator->lag_ports; temp_port;
2075 prev_port = temp_port,
2076 temp_port = temp_port->next_port_in_aggregator) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077 if (temp_port == port) { // the aggregator found - detach the port from this aggregator
Bandan Das7bfc4752010-10-16 20:19:59 +00002078 if (prev_port)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002079 prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator;
Bandan Das7bfc4752010-10-16 20:19:59 +00002080 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081 temp_aggregator->lag_ports = temp_port->next_port_in_aggregator;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082 temp_aggregator->num_of_ports--;
Bandan Das128ea6c2010-10-16 20:19:58 +00002083 if (temp_aggregator->num_of_ports == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 select_new_active_agg = temp_aggregator->is_active;
2085 // clear the aggregator
2086 ad_clear_agg(temp_aggregator);
2087 if (select_new_active_agg) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002088 pr_info("%s: Removing an active aggregator\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002089 slave->dev->master->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002090 // select new active aggregator
2091 ad_agg_selection_logic(__get_first_agg(port));
2092 }
2093 }
2094 break;
2095 }
2096 }
2097 }
Bandan Das128ea6c2010-10-16 20:19:58 +00002098 port->slave = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002099}
2100
2101/**
2102 * bond_3ad_state_machine_handler - handle state machines timeout
2103 * @bond: bonding struct to work on
2104 *
2105 * The state machine handling concept in this module is to check every tick
2106 * which state machine should operate any function. The execution order is
2107 * round robin, so when we have an interaction between state machines, the
2108 * reply of one to each other might be delayed until next tick.
2109 *
2110 * This function also complete the initialization when the agg_select_timer
2111 * times out, and it selects an aggregator for the ports that are yet not
2112 * related to any aggregator, and selects the active aggregator for a bond.
2113 */
Jay Vosburgh1b76b312007-10-17 17:37:45 -07002114void bond_3ad_state_machine_handler(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002115{
Jay Vosburgh1b76b312007-10-17 17:37:45 -07002116 struct bonding *bond = container_of(work, struct bonding,
2117 ad_work.work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002118 struct port *port;
2119 struct aggregator *aggregator;
2120
2121 read_lock(&bond->lock);
2122
Bandan Das7bfc4752010-10-16 20:19:59 +00002123 if (bond->kill_timers)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002124 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002125
2126 //check if there are any slaves
Bandan Das7bfc4752010-10-16 20:19:59 +00002127 if (bond->slave_cnt == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 goto re_arm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002129
2130 // check if agg_select_timer timer after initialize is timed out
2131 if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) {
2132 // select the active aggregator for the bond
2133 if ((port = __get_first_port(bond))) {
2134 if (!port->slave) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002135 pr_warning("%s: Warning: bond's first port is uninitialized\n",
2136 bond->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002137 goto re_arm;
2138 }
2139
2140 aggregator = __get_first_agg(port);
2141 ad_agg_selection_logic(aggregator);
2142 }
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002143 bond_3ad_set_carrier(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002144 }
2145
2146 // for each port run the state machines
2147 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2148 if (!port->slave) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002149 pr_warning("%s: Warning: Found an uninitialized port\n",
2150 bond->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151 goto re_arm;
2152 }
2153
Nils Carlson16d79d72011-03-03 22:09:11 +00002154 /* Lock around state machines to protect data accessed
2155 * by all (e.g., port->sm_vars). ad_rx_machine may run
2156 * concurrently due to incoming LACPDU.
2157 */
Nils Carlson9ac35242011-03-03 22:09:12 +00002158 __get_state_machine_lock(port);
Nils Carlson16d79d72011-03-03 22:09:11 +00002159
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160 ad_rx_machine(NULL, port);
2161 ad_periodic_machine(port);
2162 ad_port_selection_logic(port);
2163 ad_mux_machine(port);
2164 ad_tx_machine(port);
2165
2166 // turn off the BEGIN bit, since we already handled it
Bandan Das7bfc4752010-10-16 20:19:59 +00002167 if (port->sm_vars & AD_PORT_BEGIN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 port->sm_vars &= ~AD_PORT_BEGIN;
Nils Carlson16d79d72011-03-03 22:09:11 +00002169
Nils Carlson9ac35242011-03-03 22:09:12 +00002170 __release_state_machine_lock(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002171 }
2172
2173re_arm:
Jay Vosburgh1b76b312007-10-17 17:37:45 -07002174 queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175out:
2176 read_unlock(&bond->lock);
2177}
2178
2179/**
2180 * bond_3ad_rx_indication - handle a received frame
2181 * @lacpdu: received lacpdu
2182 * @slave: slave struct to work on
2183 * @length: length of the data received
2184 *
2185 * It is assumed that frames that were sent on this NIC don't returned as new
2186 * received frames (loopback). Since only the payload is given to this
2187 * function, it check for loopback.
2188 */
2189static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length)
2190{
2191 struct port *port;
2192
2193 if (length >= sizeof(struct lacpdu)) {
2194
2195 port = &(SLAVE_AD_INFO(slave).port);
2196
2197 if (!port->slave) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002198 pr_warning("%s: Warning: port of slave %s is uninitialized\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002199 slave->dev->name, slave->dev->master->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002200 return;
2201 }
2202
2203 switch (lacpdu->subtype) {
2204 case AD_TYPE_LACPDU:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002205 pr_debug("Received LACPDU on port %d\n",
2206 port->actor_port_number);
Nils Carlson16d79d72011-03-03 22:09:11 +00002207 /* Protect against concurrent state machines */
Nils Carlson9ac35242011-03-03 22:09:12 +00002208 __get_state_machine_lock(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209 ad_rx_machine(lacpdu, port);
Nils Carlson9ac35242011-03-03 22:09:12 +00002210 __release_state_machine_lock(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002211 break;
2212
2213 case AD_TYPE_MARKER:
2214 // No need to convert fields to Little Endian since we don't use the marker's fields.
2215
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07002216 switch (((struct bond_marker *)lacpdu)->tlv_type) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002217 case AD_MARKER_INFORMATION_SUBTYPE:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002218 pr_debug("Received Marker Information on port %d\n",
2219 port->actor_port_number);
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07002220 ad_marker_info_received((struct bond_marker *)lacpdu, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002221 break;
2222
2223 case AD_MARKER_RESPONSE_SUBTYPE:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002224 pr_debug("Received Marker Response on port %d\n",
2225 port->actor_port_number);
Mathieu Desnoyers1c3f0b82007-10-18 23:41:04 -07002226 ad_marker_response_received((struct bond_marker *)lacpdu, port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227 break;
2228
2229 default:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002230 pr_debug("Received an unknown Marker subtype on slot %d\n",
2231 port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 }
2233 }
2234 }
2235}
2236
2237/**
2238 * bond_3ad_adapter_speed_changed - handle a slave's speed change indication
2239 * @slave: slave struct to work on
2240 *
2241 * Handle reselection of aggregator (if needed) for this port.
2242 */
2243void bond_3ad_adapter_speed_changed(struct slave *slave)
2244{
2245 struct port *port;
2246
2247 port = &(SLAVE_AD_INFO(slave).port);
2248
2249 // if slave is null, the whole port is not initialized
2250 if (!port->slave) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002251 pr_warning("Warning: %s: speed changed for uninitialized port on %s\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002252 slave->dev->master->name, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253 return;
2254 }
2255
2256 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
Bandan Das128ea6c2010-10-16 20:19:58 +00002257 port->actor_oper_port_key = port->actor_admin_port_key |=
2258 (__get_link_speed(port) << 1);
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002259 pr_debug("Port %d changed speed\n", port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002260 // there is no need to reselect a new aggregator, just signal the
2261 // state machines to reinitialize
2262 port->sm_vars |= AD_PORT_BEGIN;
2263}
2264
2265/**
2266 * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication
2267 * @slave: slave struct to work on
2268 *
2269 * Handle reselection of aggregator (if needed) for this port.
2270 */
2271void bond_3ad_adapter_duplex_changed(struct slave *slave)
2272{
2273 struct port *port;
2274
Bandan Das128ea6c2010-10-16 20:19:58 +00002275 port = &(SLAVE_AD_INFO(slave).port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276
2277 // if slave is null, the whole port is not initialized
2278 if (!port->slave) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002279 pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002280 slave->dev->master->name, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 return;
2282 }
2283
2284 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
Bandan Das128ea6c2010-10-16 20:19:58 +00002285 port->actor_oper_port_key = port->actor_admin_port_key |=
2286 __get_duplex(port);
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002287 pr_debug("Port %d changed duplex\n", port->actor_port_number);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 // there is no need to reselect a new aggregator, just signal the
2289 // state machines to reinitialize
2290 port->sm_vars |= AD_PORT_BEGIN;
2291}
2292
2293/**
2294 * bond_3ad_handle_link_change - handle a slave's link status change indication
2295 * @slave: slave struct to work on
2296 * @status: whether the link is now up or down
2297 *
2298 * Handle reselection of aggregator (if needed) for this port.
2299 */
2300void bond_3ad_handle_link_change(struct slave *slave, char link)
2301{
2302 struct port *port;
2303
2304 port = &(SLAVE_AD_INFO(slave).port);
2305
2306 // if slave is null, the whole port is not initialized
2307 if (!port->slave) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002308 pr_warning("Warning: %s: link status changed for uninitialized port on %s\n",
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00002309 slave->dev->master->name, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002310 return;
2311 }
2312
2313 // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed)
2314 // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report
2315 if (link == BOND_LINK_UP) {
Holger Eitzenbergerf48127b2008-12-26 13:26:54 -08002316 port->is_enabled = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
Bandan Das128ea6c2010-10-16 20:19:58 +00002318 port->actor_oper_port_key = port->actor_admin_port_key |=
2319 __get_duplex(port);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320 port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS;
Bandan Das128ea6c2010-10-16 20:19:58 +00002321 port->actor_oper_port_key = port->actor_admin_port_key |=
2322 (__get_link_speed(port) << 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002323 } else {
2324 /* link has failed */
Holger Eitzenbergerf48127b2008-12-26 13:26:54 -08002325 port->is_enabled = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS;
Bandan Das128ea6c2010-10-16 20:19:58 +00002327 port->actor_oper_port_key = (port->actor_admin_port_key &=
2328 ~AD_SPEED_KEY_BITS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329 }
2330 //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN")));
2331 // there is no need to reselect a new aggregator, just signal the
2332 // state machines to reinitialize
2333 port->sm_vars |= AD_PORT_BEGIN;
2334}
2335
Jay Vosburghff59c452006-03-27 13:27:43 -08002336/*
Jasper Spaansa361c832009-10-23 04:09:24 +00002337 * set link state for bonding master: if we have an active
Jay Vosburghff59c452006-03-27 13:27:43 -08002338 * aggregator, we're up, if not, we're down. Presumes that we cannot
2339 * have an active aggregator if there are no slaves with link up.
2340 *
Jay Vosburgh031ae4d2007-06-13 22:11:34 -07002341 * This behavior complies with IEEE 802.3 section 43.3.9.
2342 *
Jay Vosburghff59c452006-03-27 13:27:43 -08002343 * Called by bond_set_carrier(). Return zero if carrier state does not
2344 * change, nonzero if it does.
2345 */
2346int bond_3ad_set_carrier(struct bonding *bond)
2347{
Jay Vosburgh031ae4d2007-06-13 22:11:34 -07002348 if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) {
Jay Vosburghff59c452006-03-27 13:27:43 -08002349 if (!netif_carrier_ok(bond->dev)) {
2350 netif_carrier_on(bond->dev);
2351 return 1;
2352 }
2353 return 0;
2354 }
2355
2356 if (netif_carrier_ok(bond->dev)) {
2357 netif_carrier_off(bond->dev);
2358 return 1;
2359 }
2360 return 0;
2361}
2362
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363/**
2364 * bond_3ad_get_active_agg_info - get information of the active aggregator
2365 * @bond: bonding struct to work on
2366 * @ad_info: ad_info struct to fill with the bond's info
2367 *
2368 * Returns: 0 on success
2369 * < 0 on error
2370 */
2371int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info)
2372{
2373 struct aggregator *aggregator = NULL;
2374 struct port *port;
2375
2376 for (port = __get_first_port(bond); port; port = __get_next_port(port)) {
2377 if (port->aggregator && port->aggregator->is_active) {
2378 aggregator = port->aggregator;
2379 break;
2380 }
2381 }
2382
2383 if (aggregator) {
2384 ad_info->aggregator_id = aggregator->aggregator_identifier;
2385 ad_info->ports = aggregator->num_of_ports;
2386 ad_info->actor_key = aggregator->actor_oper_aggregator_key;
2387 ad_info->partner_key = aggregator->partner_oper_aggregator_key;
2388 memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN);
2389 return 0;
2390 }
2391
2392 return -1;
2393}
2394
2395int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev)
2396{
2397 struct slave *slave, *start_at;
Wang Chen454d7c92008-11-12 23:37:49 -08002398 struct bonding *bond = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002399 int slave_agg_no;
2400 int slaves_in_agg;
2401 int agg_id;
2402 int i;
2403 struct ad_info ad_info;
2404 int res = 1;
2405
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002407 pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n",
2408 dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002409 goto out;
2410 }
2411
2412 slaves_in_agg = ad_info.ports;
2413 agg_id = ad_info.aggregator_id;
2414
2415 if (slaves_in_agg == 0) {
2416 /*the aggregator is empty*/
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002417 pr_debug("%s: Error: active aggregator is empty\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002418 goto out;
2419 }
2420
Jasper Spaansa361c832009-10-23 04:09:24 +00002421 slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422
2423 bond_for_each_slave(bond, slave, i) {
2424 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2425
2426 if (agg && (agg->aggregator_identifier == agg_id)) {
2427 slave_agg_no--;
Bandan Das7bfc4752010-10-16 20:19:59 +00002428 if (slave_agg_no < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430 }
2431 }
2432
2433 if (slave_agg_no >= 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002434 pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n",
2435 dev->name, agg_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002436 goto out;
2437 }
2438
2439 start_at = slave;
2440
2441 bond_for_each_slave_from(bond, slave, i, start_at) {
2442 int slave_agg_id = 0;
2443 struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator;
2444
Bandan Das7bfc4752010-10-16 20:19:59 +00002445 if (agg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002446 slave_agg_id = agg->aggregator_identifier;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002447
2448 if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) {
2449 res = bond_dev_queue_xmit(bond, skb, slave->dev);
2450 break;
2451 }
2452 }
2453
2454out:
2455 if (res) {
2456 /* no suitable interface, frame not sent */
2457 dev_kfree_skb(skb);
2458 }
Michał Mirosław0693e882011-05-07 01:48:02 +00002459
Patrick McHardyec634fe2009-07-05 19:23:38 -07002460 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002461}
2462
Jiri Pirko3aba8912011-04-19 03:48:16 +00002463void bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond,
2464 struct slave *slave)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002465{
Jiri Pirko3aba8912011-04-19 03:48:16 +00002466 if (skb->protocol != PKT_TYPE_LACPDU)
2467 return;
Neil Hormanb3053252011-01-20 09:02:31 +00002468
Andy Gospodarekab128112010-09-10 11:43:20 +00002469 if (!pskb_may_pull(skb, sizeof(struct lacpdu)))
Jiri Pirko3aba8912011-04-19 03:48:16 +00002470 return;
Andy Gospodarekab128112010-09-10 11:43:20 +00002471
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472 read_lock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002473 bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002474 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475}