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1da177e4 LT |
1 | /* |
2 | * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; either version 2 of the License, or (at your option) | |
7 | * any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 | |
16 | * Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
1da177e4 LT |
21 | */ |
22 | ||
23 | //#define BONDING_DEBUG 1 | |
24 | ||
25 | #include <linux/skbuff.h> | |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/ethtool.h> | |
fd989c83 | 30 | #include <linux/etherdevice.h> |
1da177e4 LT |
31 | #include <linux/if_bonding.h> |
32 | #include <linux/pkt_sched.h> | |
e730c155 | 33 | #include <net/net_namespace.h> |
1da177e4 LT |
34 | #include "bonding.h" |
35 | #include "bond_3ad.h" | |
36 | ||
37 | // General definitions | |
38 | #define AD_SHORT_TIMEOUT 1 | |
39 | #define AD_LONG_TIMEOUT 0 | |
40 | #define AD_STANDBY 0x2 | |
41 | #define AD_MAX_TX_IN_SECOND 3 | |
42 | #define AD_COLLECTOR_MAX_DELAY 0 | |
43 | ||
44 | // Timer definitions(43.4.4 in the 802.3ad standard) | |
45 | #define AD_FAST_PERIODIC_TIME 1 | |
46 | #define AD_SLOW_PERIODIC_TIME 30 | |
47 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
48 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
49 | #define AD_CHURN_DETECTION_TIME 60 | |
50 | #define AD_AGGREGATE_WAIT_TIME 2 | |
51 | ||
52 | // Port state definitions(43.4.2.2 in the 802.3ad standard) | |
53 | #define AD_STATE_LACP_ACTIVITY 0x1 | |
54 | #define AD_STATE_LACP_TIMEOUT 0x2 | |
55 | #define AD_STATE_AGGREGATION 0x4 | |
56 | #define AD_STATE_SYNCHRONIZATION 0x8 | |
57 | #define AD_STATE_COLLECTING 0x10 | |
58 | #define AD_STATE_DISTRIBUTING 0x20 | |
59 | #define AD_STATE_DEFAULTED 0x40 | |
60 | #define AD_STATE_EXPIRED 0x80 | |
61 | ||
62 | // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) | |
63 | #define AD_PORT_BEGIN 0x1 | |
64 | #define AD_PORT_LACP_ENABLED 0x2 | |
65 | #define AD_PORT_ACTOR_CHURN 0x4 | |
66 | #define AD_PORT_PARTNER_CHURN 0x8 | |
67 | #define AD_PORT_READY 0x10 | |
68 | #define AD_PORT_READY_N 0x20 | |
69 | #define AD_PORT_MATCHED 0x40 | |
70 | #define AD_PORT_STANDBY 0x80 | |
71 | #define AD_PORT_SELECTED 0x100 | |
72 | #define AD_PORT_MOVED 0x200 | |
73 | ||
74 | // Port Key definitions | |
75 | // key is determined according to the link speed, duplex and | |
76 | // user key(which is yet not supported) | |
77 | // ------------------------------------------------------------ | |
78 | // Port key : | User key | Speed |Duplex| | |
79 | // ------------------------------------------------------------ | |
80 | // 16 6 1 0 | |
81 | #define AD_DUPLEX_KEY_BITS 0x1 | |
82 | #define AD_SPEED_KEY_BITS 0x3E | |
83 | #define AD_USER_KEY_BITS 0xFFC0 | |
84 | ||
85 | //dalloun | |
86 | #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 | |
87 | #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 | |
88 | #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 | |
89 | #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 | |
94dbffd5 | 90 | #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 |
1da177e4 LT |
91 | //endalloun |
92 | ||
93 | // compare MAC addresses | |
94 | #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) | |
95 | ||
96 | static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}}; | |
97 | static u16 ad_ticks_per_sec; | |
98 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
99 | ||
100 | // ================= 3AD api to bonding and kernel code ================== | |
101 | static u16 __get_link_speed(struct port *port); | |
102 | static u8 __get_duplex(struct port *port); | |
103 | static inline void __initialize_port_locks(struct port *port); | |
104 | //conversions | |
1da177e4 LT |
105 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 Par); |
106 | ||
107 | ||
108 | // ================= ad code helper functions ================== | |
109 | //needed by ad_rx_machine(...) | |
110 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port); | |
111 | static void __record_default(struct port *port); | |
112 | static void __update_selected(struct lacpdu *lacpdu, struct port *port); | |
113 | static void __update_default_selected(struct port *port); | |
114 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port); | |
115 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port); | |
116 | ||
117 | //needed for ad_mux_machine(..) | |
118 | static void __attach_bond_to_agg(struct port *port); | |
119 | static void __detach_bond_from_agg(struct port *port); | |
120 | static int __agg_ports_are_ready(struct aggregator *aggregator); | |
121 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val); | |
122 | ||
123 | //needed for ad_agg_selection_logic(...) | |
124 | static u32 __get_agg_bandwidth(struct aggregator *aggregator); | |
125 | static struct aggregator *__get_active_agg(struct aggregator *aggregator); | |
126 | ||
127 | ||
128 | // ================= main 802.3ad protocol functions ================== | |
129 | static int ad_lacpdu_send(struct port *port); | |
1c3f0b8e | 130 | static int ad_marker_send(struct port *port, struct bond_marker *marker); |
1da177e4 LT |
131 | static void ad_mux_machine(struct port *port); |
132 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); | |
133 | static void ad_tx_machine(struct port *port); | |
134 | static void ad_periodic_machine(struct port *port); | |
135 | static void ad_port_selection_logic(struct port *port); | |
136 | static void ad_agg_selection_logic(struct aggregator *aggregator); | |
137 | static void ad_clear_agg(struct aggregator *aggregator); | |
138 | static void ad_initialize_agg(struct aggregator *aggregator); | |
139 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
140 | static void ad_initialize_lacpdu(struct lacpdu *Lacpdu); | |
141 | static void ad_enable_collecting_distributing(struct port *port); | |
142 | static void ad_disable_collecting_distributing(struct port *port); | |
1c3f0b8e MD |
143 | static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); |
144 | static void ad_marker_response_received(struct bond_marker *marker, struct port *port); | |
1da177e4 LT |
145 | |
146 | ||
147 | ///////////////////////////////////////////////////////////////////////////////// | |
148 | // ================= api to bonding and kernel code ================== | |
149 | ///////////////////////////////////////////////////////////////////////////////// | |
150 | ||
151 | /** | |
152 | * __get_bond_by_port - get the port's bonding struct | |
153 | * @port: the port we're looking at | |
154 | * | |
155 | * Return @port's bonding struct, or %NULL if it can't be found. | |
156 | */ | |
157 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
158 | { | |
159 | if (port->slave == NULL) { | |
160 | return NULL; | |
161 | } | |
162 | ||
163 | return bond_get_bond_by_slave(port->slave); | |
164 | } | |
165 | ||
166 | /** | |
167 | * __get_first_port - get the first port in the bond | |
168 | * @bond: the bond we're looking at | |
169 | * | |
170 | * Return the port of the first slave in @bond, or %NULL if it can't be found. | |
171 | */ | |
172 | static inline struct port *__get_first_port(struct bonding *bond) | |
173 | { | |
174 | if (bond->slave_cnt == 0) { | |
175 | return NULL; | |
176 | } | |
177 | ||
178 | return &(SLAVE_AD_INFO(bond->first_slave).port); | |
179 | } | |
180 | ||
181 | /** | |
182 | * __get_next_port - get the next port in the bond | |
183 | * @port: the port we're looking at | |
184 | * | |
185 | * Return the port of the slave that is next in line of @port's slave in the | |
186 | * bond, or %NULL if it can't be found. | |
187 | */ | |
188 | static inline struct port *__get_next_port(struct port *port) | |
189 | { | |
190 | struct bonding *bond = __get_bond_by_port(port); | |
191 | struct slave *slave = port->slave; | |
192 | ||
193 | // If there's no bond for this port, or this is the last slave | |
194 | if ((bond == NULL) || (slave->next == bond->first_slave)) { | |
195 | return NULL; | |
196 | } | |
197 | ||
198 | return &(SLAVE_AD_INFO(slave->next).port); | |
199 | } | |
200 | ||
201 | /** | |
202 | * __get_first_agg - get the first aggregator in the bond | |
203 | * @bond: the bond we're looking at | |
204 | * | |
205 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
206 | * found. | |
207 | */ | |
208 | static inline struct aggregator *__get_first_agg(struct port *port) | |
209 | { | |
210 | struct bonding *bond = __get_bond_by_port(port); | |
211 | ||
212 | // If there's no bond for this port, or bond has no slaves | |
213 | if ((bond == NULL) || (bond->slave_cnt == 0)) { | |
214 | return NULL; | |
215 | } | |
216 | ||
217 | return &(SLAVE_AD_INFO(bond->first_slave).aggregator); | |
218 | } | |
219 | ||
220 | /** | |
221 | * __get_next_agg - get the next aggregator in the bond | |
222 | * @aggregator: the aggregator we're looking at | |
223 | * | |
224 | * Return the aggregator of the slave that is next in line of @aggregator's | |
225 | * slave in the bond, or %NULL if it can't be found. | |
226 | */ | |
227 | static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) | |
228 | { | |
229 | struct slave *slave = aggregator->slave; | |
230 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
231 | ||
232 | // If there's no bond for this aggregator, or this is the last slave | |
233 | if ((bond == NULL) || (slave->next == bond->first_slave)) { | |
234 | return NULL; | |
235 | } | |
236 | ||
237 | return &(SLAVE_AD_INFO(slave->next).aggregator); | |
238 | } | |
239 | ||
fd989c83 JV |
240 | /* |
241 | * __agg_has_partner | |
242 | * | |
243 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
244 | * address for the partner). Return 0 if not. | |
245 | */ | |
246 | static inline int __agg_has_partner(struct aggregator *agg) | |
247 | { | |
248 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
249 | } | |
250 | ||
1da177e4 LT |
251 | /** |
252 | * __disable_port - disable the port's slave | |
253 | * @port: the port we're looking at | |
254 | * | |
255 | */ | |
256 | static inline void __disable_port(struct port *port) | |
257 | { | |
258 | bond_set_slave_inactive_flags(port->slave); | |
259 | } | |
260 | ||
261 | /** | |
262 | * __enable_port - enable the port's slave, if it's up | |
263 | * @port: the port we're looking at | |
264 | * | |
265 | */ | |
266 | static inline void __enable_port(struct port *port) | |
267 | { | |
268 | struct slave *slave = port->slave; | |
269 | ||
270 | if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) { | |
271 | bond_set_slave_active_flags(slave); | |
272 | } | |
273 | } | |
274 | ||
275 | /** | |
276 | * __port_is_enabled - check if the port's slave is in active state | |
277 | * @port: the port we're looking at | |
278 | * | |
279 | */ | |
280 | static inline int __port_is_enabled(struct port *port) | |
281 | { | |
282 | return(port->slave->state == BOND_STATE_ACTIVE); | |
283 | } | |
284 | ||
285 | /** | |
286 | * __get_agg_selection_mode - get the aggregator selection mode | |
287 | * @port: the port we're looking at | |
288 | * | |
fd989c83 | 289 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
290 | */ |
291 | static inline u32 __get_agg_selection_mode(struct port *port) | |
292 | { | |
293 | struct bonding *bond = __get_bond_by_port(port); | |
294 | ||
295 | if (bond == NULL) { | |
fd989c83 | 296 | return BOND_AD_STABLE; |
1da177e4 LT |
297 | } |
298 | ||
299 | return BOND_AD_INFO(bond).agg_select_mode; | |
300 | } | |
301 | ||
302 | /** | |
303 | * __check_agg_selection_timer - check if the selection timer has expired | |
304 | * @port: the port we're looking at | |
305 | * | |
306 | */ | |
307 | static inline int __check_agg_selection_timer(struct port *port) | |
308 | { | |
309 | struct bonding *bond = __get_bond_by_port(port); | |
310 | ||
311 | if (bond == NULL) { | |
312 | return 0; | |
313 | } | |
314 | ||
315 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
316 | } | |
317 | ||
318 | /** | |
319 | * __get_rx_machine_lock - lock the port's RX machine | |
320 | * @port: the port we're looking at | |
321 | * | |
322 | */ | |
323 | static inline void __get_rx_machine_lock(struct port *port) | |
324 | { | |
2bf86b7a | 325 | spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); |
1da177e4 LT |
326 | } |
327 | ||
328 | /** | |
329 | * __release_rx_machine_lock - unlock the port's RX machine | |
330 | * @port: the port we're looking at | |
331 | * | |
332 | */ | |
333 | static inline void __release_rx_machine_lock(struct port *port) | |
334 | { | |
2bf86b7a | 335 | spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); |
1da177e4 LT |
336 | } |
337 | ||
338 | /** | |
339 | * __get_link_speed - get a port's speed | |
340 | * @port: the port we're looking at | |
341 | * | |
342 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
343 | * 0, | |
344 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
345 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
346 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
347 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
348 | */ |
349 | static u16 __get_link_speed(struct port *port) | |
350 | { | |
351 | struct slave *slave = port->slave; | |
352 | u16 speed; | |
353 | ||
354 | /* this if covers only a special case: when the configuration starts with | |
355 | * link down, it sets the speed to 0. | |
356 | * This is done in spite of the fact that the e100 driver reports 0 to be | |
357 | * compatible with MVT in the future.*/ | |
358 | if (slave->link != BOND_LINK_UP) { | |
359 | speed=0; | |
360 | } else { | |
361 | switch (slave->speed) { | |
362 | case SPEED_10: | |
363 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
364 | break; | |
365 | ||
366 | case SPEED_100: | |
367 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
368 | break; | |
369 | ||
370 | case SPEED_1000: | |
371 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
372 | break; | |
373 | ||
94dbffd5 JV |
374 | case SPEED_10000: |
375 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
376 | break; | |
377 | ||
1da177e4 LT |
378 | default: |
379 | speed = 0; // unknown speed value from ethtool. shouldn't happen | |
380 | break; | |
381 | } | |
382 | } | |
383 | ||
384 | dprintk("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed); | |
385 | return speed; | |
386 | } | |
387 | ||
388 | /** | |
389 | * __get_duplex - get a port's duplex | |
390 | * @port: the port we're looking at | |
391 | * | |
392 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
393 | * 0x01 if in full duplex | |
394 | * 0x00 otherwise | |
395 | */ | |
396 | static u8 __get_duplex(struct port *port) | |
397 | { | |
398 | struct slave *slave = port->slave; | |
399 | ||
400 | u8 retval; | |
401 | ||
402 | // handling a special case: when the configuration starts with | |
403 | // link down, it sets the duplex to 0. | |
404 | if (slave->link != BOND_LINK_UP) { | |
405 | retval=0x0; | |
406 | } else { | |
407 | switch (slave->duplex) { | |
408 | case DUPLEX_FULL: | |
409 | retval=0x1; | |
410 | dprintk("Port %d Received status full duplex update from adapter\n", port->actor_port_number); | |
411 | break; | |
412 | case DUPLEX_HALF: | |
413 | default: | |
414 | retval=0x0; | |
415 | dprintk("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number); | |
416 | break; | |
417 | } | |
418 | } | |
419 | return retval; | |
420 | } | |
421 | ||
422 | /** | |
423 | * __initialize_port_locks - initialize a port's RX machine spinlock | |
424 | * @port: the port we're looking at | |
425 | * | |
426 | */ | |
427 | static inline void __initialize_port_locks(struct port *port) | |
428 | { | |
429 | // make sure it isn't called twice | |
430 | spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); | |
431 | } | |
432 | ||
433 | //conversions | |
1da177e4 LT |
434 | |
435 | /** | |
436 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
437 | * @timer_type: which timer to operate | |
438 | * @par: timer parameter. see below | |
439 | * | |
440 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
441 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
442 | * %SLOW_PERIODIC_TIME. | |
443 | */ | |
444 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
445 | { | |
446 | u16 retval=0; //to silence the compiler | |
447 | ||
448 | switch (timer_type) { | |
449 | case AD_CURRENT_WHILE_TIMER: // for rx machine usage | |
450 | if (par) { // for short or long timeout | |
451 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout | |
452 | } else { | |
453 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout | |
454 | } | |
455 | break; | |
456 | case AD_ACTOR_CHURN_TIMER: // for local churn machine | |
457 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
458 | break; | |
459 | case AD_PERIODIC_TIMER: // for periodic machine | |
460 | retval = (par*ad_ticks_per_sec); // long timeout | |
461 | break; | |
462 | case AD_PARTNER_CHURN_TIMER: // for remote churn machine | |
463 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
464 | break; | |
465 | case AD_WAIT_WHILE_TIMER: // for selection machine | |
466 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
467 | break; | |
468 | } | |
469 | return retval; | |
470 | } | |
471 | ||
472 | ||
473 | ///////////////////////////////////////////////////////////////////////////////// | |
474 | // ================= ad_rx_machine helper functions ================== | |
475 | ///////////////////////////////////////////////////////////////////////////////// | |
476 | ||
477 | /** | |
478 | * __record_pdu - record parameters from a received lacpdu | |
479 | * @lacpdu: the lacpdu we've received | |
480 | * @port: the port we're looking at | |
481 | * | |
482 | * Record the parameter values for the Actor carried in a received lacpdu as | |
483 | * the current partner operational parameter values and sets | |
484 | * actor_oper_port_state.defaulted to FALSE. | |
485 | */ | |
486 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
487 | { | |
488 | // validate lacpdu and port | |
489 | if (lacpdu && port) { | |
490 | // record the new parameter values for the partner operational | |
89cc76f9 JV |
491 | port->partner_oper_port_number = ntohs(lacpdu->actor_port); |
492 | port->partner_oper_port_priority = ntohs(lacpdu->actor_port_priority); | |
1da177e4 | 493 | port->partner_oper_system = lacpdu->actor_system; |
89cc76f9 JV |
494 | port->partner_oper_system_priority = ntohs(lacpdu->actor_system_priority); |
495 | port->partner_oper_key = ntohs(lacpdu->actor_key); | |
1da177e4 LT |
496 | // zero partener's lase states |
497 | port->partner_oper_port_state = 0; | |
498 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_ACTIVITY); | |
499 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_TIMEOUT); | |
500 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_AGGREGATION); | |
501 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION); | |
502 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_COLLECTING); | |
503 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DISTRIBUTING); | |
504 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DEFAULTED); | |
505 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_EXPIRED); | |
506 | ||
507 | // set actor_oper_port_state.defaulted to FALSE | |
508 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; | |
509 | ||
510 | // set the partner sync. to on if the partner is sync. and the port is matched | |
511 | if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { | |
512 | port->partner_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
513 | } else { | |
514 | port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
515 | } | |
516 | } | |
517 | } | |
518 | ||
519 | /** | |
520 | * __record_default - record default parameters | |
521 | * @port: the port we're looking at | |
522 | * | |
523 | * This function records the default parameter values for the partner carried | |
524 | * in the Partner Admin parameters as the current partner operational parameter | |
525 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
526 | */ | |
527 | static void __record_default(struct port *port) | |
528 | { | |
529 | // validate the port | |
530 | if (port) { | |
531 | // record the partner admin parameters | |
532 | port->partner_oper_port_number = port->partner_admin_port_number; | |
533 | port->partner_oper_port_priority = port->partner_admin_port_priority; | |
534 | port->partner_oper_system = port->partner_admin_system; | |
535 | port->partner_oper_system_priority = port->partner_admin_system_priority; | |
536 | port->partner_oper_key = port->partner_admin_key; | |
537 | port->partner_oper_port_state = port->partner_admin_port_state; | |
538 | ||
539 | // set actor_oper_port_state.defaulted to true | |
540 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; | |
541 | } | |
542 | } | |
543 | ||
544 | /** | |
545 | * __update_selected - update a port's Selected variable from a received lacpdu | |
546 | * @lacpdu: the lacpdu we've received | |
547 | * @port: the port we're looking at | |
548 | * | |
549 | * Update the value of the selected variable, using parameter values from a | |
550 | * newly received lacpdu. The parameter values for the Actor carried in the | |
551 | * received PDU are compared with the corresponding operational parameter | |
552 | * values for the ports partner. If one or more of the comparisons shows that | |
553 | * the value(s) received in the PDU differ from the current operational values, | |
554 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
555 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
556 | */ | |
557 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
558 | { | |
559 | // validate lacpdu and port | |
560 | if (lacpdu && port) { | |
561 | // check if any parameter is different | |
89cc76f9 JV |
562 | if ((ntohs(lacpdu->actor_port) != port->partner_oper_port_number) || |
563 | (ntohs(lacpdu->actor_port_priority) != port->partner_oper_port_priority) || | |
1da177e4 | 564 | MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper_system)) || |
89cc76f9 JV |
565 | (ntohs(lacpdu->actor_system_priority) != port->partner_oper_system_priority) || |
566 | (ntohs(lacpdu->actor_key) != port->partner_oper_key) || | |
1da177e4 LT |
567 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) |
568 | ) { | |
569 | // update the state machine Selected variable | |
570 | port->sm_vars &= ~AD_PORT_SELECTED; | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
575 | /** | |
576 | * __update_default_selected - update a port's Selected variable from Partner | |
577 | * @port: the port we're looking at | |
578 | * | |
579 | * This function updates the value of the selected variable, using the partner | |
580 | * administrative parameter values. The administrative values are compared with | |
581 | * the corresponding operational parameter values for the partner. If one or | |
582 | * more of the comparisons shows that the administrative value(s) differ from | |
583 | * the current operational values, then Selected is set to FALSE and | |
584 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
585 | * Selected remains unchanged. | |
586 | */ | |
587 | static void __update_default_selected(struct port *port) | |
588 | { | |
589 | // validate the port | |
590 | if (port) { | |
591 | // check if any parameter is different | |
592 | if ((port->partner_admin_port_number != port->partner_oper_port_number) || | |
593 | (port->partner_admin_port_priority != port->partner_oper_port_priority) || | |
594 | MAC_ADDRESS_COMPARE(&(port->partner_admin_system), &(port->partner_oper_system)) || | |
595 | (port->partner_admin_system_priority != port->partner_oper_system_priority) || | |
596 | (port->partner_admin_key != port->partner_oper_key) || | |
597 | ((port->partner_admin_port_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) | |
598 | ) { | |
599 | // update the state machine Selected variable | |
600 | port->sm_vars &= ~AD_PORT_SELECTED; | |
601 | } | |
602 | } | |
603 | } | |
604 | ||
605 | /** | |
606 | * __choose_matched - update a port's matched variable from a received lacpdu | |
607 | * @lacpdu: the lacpdu we've received | |
608 | * @port: the port we're looking at | |
609 | * | |
610 | * Update the value of the matched variable, using parameter values from a | |
611 | * newly received lacpdu. Parameter values for the partner carried in the | |
612 | * received PDU are compared with the corresponding operational parameter | |
613 | * values for the actor. Matched is set to TRUE if all of these parameters | |
614 | * match and the PDU parameter partner_state.aggregation has the same value as | |
615 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
616 | * in the aggregation. Matched is also set to TRUE if the value of | |
617 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
618 | * an individual link and lacp will actively maintain the link. Otherwise, | |
619 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
620 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
621 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
622 | * partner_state.lacp_activity variables are TRUE. | |
623 | */ | |
624 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
625 | { | |
626 | // validate lacpdu and port | |
627 | if (lacpdu && port) { | |
628 | // check if all parameters are alike | |
89cc76f9 JV |
629 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
630 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
1da177e4 | 631 | !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && |
89cc76f9 JV |
632 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
633 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
1da177e4 LT |
634 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || |
635 | // or this is individual link(aggregation == FALSE) | |
636 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) | |
637 | ) { | |
638 | // update the state machine Matched variable | |
639 | port->sm_vars |= AD_PORT_MATCHED; | |
640 | } else { | |
641 | port->sm_vars &= ~AD_PORT_MATCHED; | |
642 | } | |
643 | } | |
644 | } | |
645 | ||
646 | /** | |
647 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
648 | * @lacpdu: the lacpdu we've received | |
649 | * @port: the port we're looking at | |
650 | * | |
651 | * Updates the value of the ntt variable, using parameter values from a newly | |
652 | * received lacpdu. The parameter values for the partner carried in the | |
653 | * received PDU are compared with the corresponding operational parameter | |
654 | * values for the Actor. If one or more of the comparisons shows that the | |
655 | * value(s) received in the PDU differ from the current operational values, | |
656 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
657 | */ | |
658 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
659 | { | |
660 | // validate lacpdu and port | |
661 | if (lacpdu && port) { | |
662 | // check if any parameter is different | |
89cc76f9 JV |
663 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
664 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
1da177e4 | 665 | MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
666 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
667 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
668 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
669 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
670 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
671 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
672 | ) { | |
673 | // set ntt to be TRUE | |
674 | port->ntt = 1; | |
675 | } | |
676 | } | |
677 | } | |
678 | ||
679 | /** | |
680 | * __attach_bond_to_agg | |
681 | * @port: the port we're looking at | |
682 | * | |
683 | * Handle the attaching of the port's control parser/multiplexer and the | |
684 | * aggregator. This function does nothing since the parser/multiplexer of the | |
685 | * receive and the parser/multiplexer of the aggregator are already combined. | |
686 | */ | |
687 | static void __attach_bond_to_agg(struct port *port) | |
688 | { | |
689 | port=NULL; // just to satisfy the compiler | |
690 | // This function does nothing since the parser/multiplexer of the receive | |
691 | // and the parser/multiplexer of the aggregator are already combined | |
692 | } | |
693 | ||
694 | /** | |
695 | * __detach_bond_from_agg | |
696 | * @port: the port we're looking at | |
697 | * | |
698 | * Handle the detaching of the port's control parser/multiplexer from the | |
699 | * aggregator. This function does nothing since the parser/multiplexer of the | |
700 | * receive and the parser/multiplexer of the aggregator are already combined. | |
701 | */ | |
702 | static void __detach_bond_from_agg(struct port *port) | |
703 | { | |
704 | port=NULL; // just to satisfy the compiler | |
705 | // This function does nothing sience the parser/multiplexer of the receive | |
706 | // and the parser/multiplexer of the aggregator are already combined | |
707 | } | |
708 | ||
709 | /** | |
710 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
711 | * @aggregator: the aggregator we're looking at | |
712 | * | |
713 | */ | |
714 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
715 | { | |
716 | struct port *port; | |
717 | int retval = 1; | |
718 | ||
719 | if (aggregator) { | |
720 | // scan all ports in this aggregator to verfy if they are all ready | |
721 | for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
722 | if (!(port->sm_vars & AD_PORT_READY_N)) { | |
723 | retval = 0; | |
724 | break; | |
725 | } | |
726 | } | |
727 | } | |
728 | ||
729 | return retval; | |
730 | } | |
731 | ||
732 | /** | |
733 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
734 | * @aggregator: the aggregator we're looking at | |
735 | * @val: Should the ports' ready bit be set on or off | |
736 | * | |
737 | */ | |
738 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
739 | { | |
740 | struct port *port; | |
741 | ||
742 | for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
743 | if (val) { | |
744 | port->sm_vars |= AD_PORT_READY; | |
745 | } else { | |
746 | port->sm_vars &= ~AD_PORT_READY; | |
747 | } | |
748 | } | |
749 | } | |
750 | ||
751 | /** | |
752 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
753 | * @aggregator: the aggregator we're looking at | |
754 | * | |
755 | */ | |
756 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
757 | { | |
758 | u32 bandwidth=0; | |
759 | u32 basic_speed; | |
760 | ||
761 | if (aggregator->num_of_ports) { | |
762 | basic_speed = __get_link_speed(aggregator->lag_ports); | |
763 | switch (basic_speed) { | |
764 | case AD_LINK_SPEED_BITMASK_1MBPS: | |
765 | bandwidth = aggregator->num_of_ports; | |
766 | break; | |
767 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
768 | bandwidth = aggregator->num_of_ports * 10; | |
769 | break; | |
770 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
771 | bandwidth = aggregator->num_of_ports * 100; | |
772 | break; | |
773 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
774 | bandwidth = aggregator->num_of_ports * 1000; | |
775 | break; | |
94dbffd5 JV |
776 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
777 | bandwidth = aggregator->num_of_ports * 10000; | |
778 | break; | |
1da177e4 LT |
779 | default: |
780 | bandwidth=0; // to silent the compilor .... | |
781 | } | |
782 | } | |
783 | return bandwidth; | |
784 | } | |
785 | ||
786 | /** | |
787 | * __get_active_agg - get the current active aggregator | |
788 | * @aggregator: the aggregator we're looking at | |
789 | * | |
790 | */ | |
791 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
792 | { | |
793 | struct aggregator *retval = NULL; | |
794 | ||
795 | for (; aggregator; aggregator = __get_next_agg(aggregator)) { | |
796 | if (aggregator->is_active) { | |
797 | retval = aggregator; | |
798 | break; | |
799 | } | |
800 | } | |
801 | ||
802 | return retval; | |
803 | } | |
804 | ||
805 | /** | |
806 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
807 | * @port: the port we're looking at | |
808 | * | |
809 | */ | |
810 | static inline void __update_lacpdu_from_port(struct port *port) | |
811 | { | |
812 | struct lacpdu *lacpdu = &port->lacpdu; | |
813 | ||
814 | /* update current actual Actor parameters */ | |
815 | /* lacpdu->subtype initialized | |
816 | * lacpdu->version_number initialized | |
817 | * lacpdu->tlv_type_actor_info initialized | |
818 | * lacpdu->actor_information_length initialized | |
819 | */ | |
820 | ||
d3bb52b0 | 821 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 822 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
823 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
824 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
825 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
826 | lacpdu->actor_state = port->actor_oper_port_state; |
827 | ||
828 | /* lacpdu->reserved_3_1 initialized | |
829 | * lacpdu->tlv_type_partner_info initialized | |
830 | * lacpdu->partner_information_length initialized | |
831 | */ | |
832 | ||
d3bb52b0 | 833 | lacpdu->partner_system_priority = htons(port->partner_oper_system_priority); |
1da177e4 | 834 | lacpdu->partner_system = port->partner_oper_system; |
d3bb52b0 AV |
835 | lacpdu->partner_key = htons(port->partner_oper_key); |
836 | lacpdu->partner_port_priority = htons(port->partner_oper_port_priority); | |
837 | lacpdu->partner_port = htons(port->partner_oper_port_number); | |
1da177e4 LT |
838 | lacpdu->partner_state = port->partner_oper_port_state; |
839 | ||
840 | /* lacpdu->reserved_3_2 initialized | |
841 | * lacpdu->tlv_type_collector_info initialized | |
842 | * lacpdu->collector_information_length initialized | |
843 | * collector_max_delay initialized | |
844 | * reserved_12[12] initialized | |
845 | * tlv_type_terminator initialized | |
846 | * terminator_length initialized | |
847 | * reserved_50[50] initialized | |
848 | */ | |
1da177e4 LT |
849 | } |
850 | ||
851 | ////////////////////////////////////////////////////////////////////////////////////// | |
852 | // ================= main 802.3ad protocol code ====================================== | |
853 | ////////////////////////////////////////////////////////////////////////////////////// | |
854 | ||
855 | /** | |
856 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
857 | * @port: the port we're looking at | |
858 | * | |
859 | * Returns: 0 on success | |
860 | * < 0 on error | |
861 | */ | |
862 | static int ad_lacpdu_send(struct port *port) | |
863 | { | |
864 | struct slave *slave = port->slave; | |
865 | struct sk_buff *skb; | |
866 | struct lacpdu_header *lacpdu_header; | |
867 | int length = sizeof(struct lacpdu_header); | |
868 | struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; | |
869 | ||
870 | skb = dev_alloc_skb(length); | |
871 | if (!skb) { | |
872 | return -ENOMEM; | |
873 | } | |
874 | ||
875 | skb->dev = slave->dev; | |
459a98ed | 876 | skb_reset_mac_header(skb); |
b0e380b1 | 877 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
878 | skb->protocol = PKT_TYPE_LACPDU; |
879 | skb->priority = TC_PRIO_CONTROL; | |
880 | ||
881 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
882 | ||
883 | lacpdu_header->ad_header.destination_address = lacpdu_multicast_address; | |
884 | /* Note: source addres is set to be the member's PERMANENT address, because we use it | |
885 | to identify loopback lacpdus in receive. */ | |
886 | lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); | |
887 | lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU; | |
888 | ||
889 | lacpdu_header->lacpdu = port->lacpdu; // struct copy | |
890 | ||
891 | dev_queue_xmit(skb); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
896 | /** | |
897 | * ad_marker_send - send marker information/response on a given port | |
898 | * @port: the port we're looking at | |
899 | * @marker: marker data to send | |
900 | * | |
901 | * Returns: 0 on success | |
902 | * < 0 on error | |
903 | */ | |
1c3f0b8e | 904 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
905 | { |
906 | struct slave *slave = port->slave; | |
907 | struct sk_buff *skb; | |
1c3f0b8e MD |
908 | struct bond_marker_header *marker_header; |
909 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
910 | struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; |
911 | ||
912 | skb = dev_alloc_skb(length + 16); | |
913 | if (!skb) { | |
914 | return -ENOMEM; | |
915 | } | |
916 | ||
917 | skb_reserve(skb, 16); | |
918 | ||
919 | skb->dev = slave->dev; | |
459a98ed | 920 | skb_reset_mac_header(skb); |
b0e380b1 | 921 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
922 | skb->protocol = PKT_TYPE_LACPDU; |
923 | ||
1c3f0b8e | 924 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 LT |
925 | |
926 | marker_header->ad_header.destination_address = lacpdu_multicast_address; | |
927 | /* Note: source addres is set to be the member's PERMANENT address, because we use it | |
928 | to identify loopback MARKERs in receive. */ | |
929 | marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); | |
930 | marker_header->ad_header.length_type = PKT_TYPE_LACPDU; | |
931 | ||
932 | marker_header->marker = *marker; // struct copy | |
933 | ||
934 | dev_queue_xmit(skb); | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | /** | |
940 | * ad_mux_machine - handle a port's mux state machine | |
941 | * @port: the port we're looking at | |
942 | * | |
943 | */ | |
944 | static void ad_mux_machine(struct port *port) | |
945 | { | |
946 | mux_states_t last_state; | |
947 | ||
948 | // keep current State Machine state to compare later if it was changed | |
949 | last_state = port->sm_mux_state; | |
950 | ||
951 | if (port->sm_vars & AD_PORT_BEGIN) { | |
952 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
953 | } else { | |
954 | switch (port->sm_mux_state) { | |
955 | case AD_MUX_DETACHED: | |
956 | if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY | |
957 | port->sm_mux_state = AD_MUX_WAITING; // next state | |
958 | } | |
959 | break; | |
960 | case AD_MUX_WAITING: | |
961 | // if SELECTED == FALSE return to DETACH state | |
962 | if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED | |
963 | port->sm_vars &= ~AD_PORT_READY_N; | |
964 | // in order to withhold the Selection Logic to check all ports READY_N value | |
965 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
966 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
967 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
968 | break; | |
969 | } | |
970 | ||
971 | // check if the wait_while_timer expired | |
972 | if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) { | |
973 | port->sm_vars |= AD_PORT_READY_N; | |
974 | } | |
975 | ||
976 | // in order to withhold the selection logic to check all ports READY_N value | |
977 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
978 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
979 | ||
980 | // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state | |
981 | if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) { | |
982 | port->sm_mux_state = AD_MUX_ATTACHED; // next state | |
983 | } | |
984 | break; | |
985 | case AD_MUX_ATTACHED: | |
986 | // check also if agg_select_timer expired(so the edable port will take place only after this timer) | |
987 | if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { | |
988 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state | |
989 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY | |
990 | port->sm_vars &= ~AD_PORT_READY_N; | |
991 | // in order to withhold the selection logic to check all ports READY_N value | |
992 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
993 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
994 | port->sm_mux_state = AD_MUX_DETACHED;// next state | |
995 | } | |
996 | break; | |
997 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
998 | if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || | |
999 | !(port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) | |
1000 | ) { | |
1001 | port->sm_mux_state = AD_MUX_ATTACHED;// next state | |
1002 | ||
1003 | } else { | |
1004 | // if port state hasn't changed make | |
1005 | // sure that a collecting distributing | |
1006 | // port in an active aggregator is enabled | |
1007 | if (port->aggregator && | |
1008 | port->aggregator->is_active && | |
1009 | !__port_is_enabled(port)) { | |
1010 | ||
1011 | __enable_port(port); | |
1012 | } | |
1013 | } | |
1014 | break; | |
1015 | default: //to silence the compiler | |
1016 | break; | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | // check if the state machine was changed | |
1021 | if (port->sm_mux_state != last_state) { | |
1022 | dprintk("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state); | |
1023 | switch (port->sm_mux_state) { | |
1024 | case AD_MUX_DETACHED: | |
1025 | __detach_bond_from_agg(port); | |
1026 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
1027 | ad_disable_collecting_distributing(port); | |
1028 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
1029 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
1030 | port->ntt = 1; | |
1031 | break; | |
1032 | case AD_MUX_WAITING: | |
1033 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
1034 | break; | |
1035 | case AD_MUX_ATTACHED: | |
1036 | __attach_bond_to_agg(port); | |
1037 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
1038 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
1039 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
1040 | ad_disable_collecting_distributing(port); | |
1041 | port->ntt = 1; | |
1042 | break; | |
1043 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1044 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
1045 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
1046 | ad_enable_collecting_distributing(port); | |
1047 | port->ntt = 1; | |
1048 | break; | |
1049 | default: //to silence the compiler | |
1050 | break; | |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | /** | |
1056 | * ad_rx_machine - handle a port's rx State Machine | |
1057 | * @lacpdu: the lacpdu we've received | |
1058 | * @port: the port we're looking at | |
1059 | * | |
1060 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
1061 | * CURRENT. If timer expired set the state machine in the proper state. | |
1062 | * In other cases, this function checks if we need to switch to other state. | |
1063 | */ | |
1064 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
1065 | { | |
1066 | rx_states_t last_state; | |
1067 | ||
1068 | // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback) | |
1069 | __get_rx_machine_lock(port); | |
1070 | ||
1071 | // keep current State Machine state to compare later if it was changed | |
1072 | last_state = port->sm_rx_state; | |
1073 | ||
1074 | // check if state machine should change state | |
1075 | // first, check if port was reinitialized | |
1076 | if (port->sm_vars & AD_PORT_BEGIN) { | |
1077 | port->sm_rx_state = AD_RX_INITIALIZE; // next state | |
1078 | } | |
1079 | // check if port is not enabled | |
1080 | else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) { | |
1081 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1082 | } | |
1083 | // check if new lacpdu arrived | |
1084 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { | |
1085 | port->sm_rx_timer_counter = 0; // zero timer | |
1086 | port->sm_rx_state = AD_RX_CURRENT; | |
1087 | } else { | |
1088 | // if timer is on, and if it is expired | |
1089 | if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { | |
1090 | switch (port->sm_rx_state) { | |
1091 | case AD_RX_EXPIRED: | |
1092 | port->sm_rx_state = AD_RX_DEFAULTED; // next state | |
1093 | break; | |
1094 | case AD_RX_CURRENT: | |
1095 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1096 | break; | |
1097 | default: //to silence the compiler | |
1098 | break; | |
1099 | } | |
1100 | } else { | |
1101 | // if no lacpdu arrived and no timer is on | |
1102 | switch (port->sm_rx_state) { | |
1103 | case AD_RX_PORT_DISABLED: | |
1104 | if (port->sm_vars & AD_PORT_MOVED) { | |
1105 | port->sm_rx_state = AD_RX_INITIALIZE; // next state | |
1106 | } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1107 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1108 | } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) { | |
1109 | port->sm_rx_state = AD_RX_LACP_DISABLED; // next state | |
1110 | } | |
1111 | break; | |
1112 | default: //to silence the compiler | |
1113 | break; | |
1114 | ||
1115 | } | |
1116 | } | |
1117 | } | |
1118 | ||
1119 | // check if the State machine was changed or new lacpdu arrived | |
1120 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
1121 | dprintk("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state); | |
1122 | switch (port->sm_rx_state) { | |
1123 | case AD_RX_INITIALIZE: | |
1124 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { | |
1125 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
1126 | } else { | |
1127 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
1128 | } | |
1129 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1130 | __record_default(port); | |
1131 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1132 | port->sm_vars &= ~AD_PORT_MOVED; | |
1133 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1134 | ||
1135 | /*- Fall Through -*/ | |
1136 | ||
1137 | case AD_RX_PORT_DISABLED: | |
1138 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1139 | break; | |
1140 | case AD_RX_LACP_DISABLED: | |
1141 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1142 | __record_default(port); | |
1143 | port->partner_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1144 | port->sm_vars |= AD_PORT_MATCHED; | |
1145 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1146 | break; | |
1147 | case AD_RX_EXPIRED: | |
1148 | //Reset of the Synchronization flag. (Standard 43.4.12) | |
1149 | //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the | |
1150 | //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. | |
1151 | port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
1152 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1153 | port->partner_oper_port_state |= AD_SHORT_TIMEOUT; | |
1154 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); | |
1155 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1156 | break; | |
1157 | case AD_RX_DEFAULTED: | |
1158 | __update_default_selected(port); | |
1159 | __record_default(port); | |
1160 | port->sm_vars |= AD_PORT_MATCHED; | |
1161 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1162 | break; | |
1163 | case AD_RX_CURRENT: | |
1164 | // detect loopback situation | |
1165 | if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { | |
1166 | // INFO_RECEIVED_LOOPBACK_FRAMES | |
4e0952c7 MW |
1167 | printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on " |
1168 | "adapter (%s). Check the configuration to verify that all " | |
1169 | "Adapters are connected to 802.3ad compliant switch ports\n", | |
1170 | port->slave->dev->master->name, port->slave->dev->name); | |
1da177e4 LT |
1171 | __release_rx_machine_lock(port); |
1172 | return; | |
1173 | } | |
1174 | __update_selected(lacpdu, port); | |
1175 | __update_ntt(lacpdu, port); | |
1176 | __record_pdu(lacpdu, port); | |
1177 | __choose_matched(lacpdu, port); | |
1178 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); | |
1179 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1180 | // verify that if the aggregator is enabled, the port is enabled too. | |
1181 | //(because if the link goes down for a short time, the 802.3ad will not | |
1182 | // catch it, and the port will continue to be disabled) | |
1183 | if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) { | |
1184 | __enable_port(port); | |
1185 | } | |
1186 | break; | |
1187 | default: //to silence the compiler | |
1188 | break; | |
1189 | } | |
1190 | } | |
1191 | __release_rx_machine_lock(port); | |
1192 | } | |
1193 | ||
1194 | /** | |
1195 | * ad_tx_machine - handle a port's tx state machine | |
1196 | * @port: the port we're looking at | |
1197 | * | |
1198 | */ | |
1199 | static void ad_tx_machine(struct port *port) | |
1200 | { | |
1201 | // check if tx timer expired, to verify that we do not send more than 3 packets per second | |
1202 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1203 | // check if there is something to send | |
1204 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1205 | __update_lacpdu_from_port(port); | |
1206 | // send the lacpdu | |
1207 | if (ad_lacpdu_send(port) >= 0) { | |
1208 | dprintk("Sent LACPDU on port %d\n", port->actor_port_number); | |
1209 | // mark ntt as false, so it will not be sent again until demanded | |
1210 | port->ntt = 0; | |
1211 | } | |
1212 | } | |
1213 | // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND | |
1214 | port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1215 | } | |
1216 | } | |
1217 | ||
1218 | /** | |
1219 | * ad_periodic_machine - handle a port's periodic state machine | |
1220 | * @port: the port we're looking at | |
1221 | * | |
1222 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1223 | */ | |
1224 | static void ad_periodic_machine(struct port *port) | |
1225 | { | |
1226 | periodic_states_t last_state; | |
1227 | ||
1228 | // keep current state machine state to compare later if it was changed | |
1229 | last_state = port->sm_periodic_state; | |
1230 | ||
1231 | // check if port was reinitialized | |
1232 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || | |
1233 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper_port_state & AD_STATE_LACP_ACTIVITY)) | |
1234 | ) { | |
1235 | port->sm_periodic_state = AD_NO_PERIODIC; // next state | |
1236 | } | |
1237 | // check if state machine should change state | |
1238 | else if (port->sm_periodic_timer_counter) { | |
1239 | // check if periodic state machine expired | |
1240 | if (!(--port->sm_periodic_timer_counter)) { | |
1241 | // if expired then do tx | |
1242 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1243 | } else { | |
1244 | // If not expired, check if there is some new timeout parameter from the partner state | |
1245 | switch (port->sm_periodic_state) { | |
1246 | case AD_FAST_PERIODIC: | |
1247 | if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { | |
1248 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state | |
1249 | } | |
1250 | break; | |
1251 | case AD_SLOW_PERIODIC: | |
1252 | if ((port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { | |
1253 | // stop current timer | |
1254 | port->sm_periodic_timer_counter = 0; | |
1255 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1256 | } | |
1257 | break; | |
1258 | default: //to silence the compiler | |
1259 | break; | |
1260 | } | |
1261 | } | |
1262 | } else { | |
1263 | switch (port->sm_periodic_state) { | |
1264 | case AD_NO_PERIODIC: | |
1265 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1266 | break; | |
1267 | case AD_PERIODIC_TX: | |
1268 | if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { | |
1269 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state | |
1270 | } else { | |
1271 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1272 | } | |
1273 | break; | |
1274 | default: //to silence the compiler | |
1275 | break; | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | // check if the state machine was changed | |
1280 | if (port->sm_periodic_state != last_state) { | |
1281 | dprintk("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state); | |
1282 | switch (port->sm_periodic_state) { | |
1283 | case AD_NO_PERIODIC: | |
1284 | port->sm_periodic_timer_counter = 0; // zero timer | |
1285 | break; | |
1286 | case AD_FAST_PERIODIC: | |
1287 | 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 | |
1288 | break; | |
1289 | case AD_SLOW_PERIODIC: | |
1290 | 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 | |
1291 | break; | |
1292 | case AD_PERIODIC_TX: | |
1293 | port->ntt = 1; | |
1294 | break; | |
1295 | default: //to silence the compiler | |
1296 | break; | |
1297 | } | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /** | |
1302 | * ad_port_selection_logic - select aggregation groups | |
1303 | * @port: the port we're looking at | |
1304 | * | |
1305 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1306 | * selection logic is called in the inititalization (after all the handshkes), | |
1307 | * and after every lacpdu receive (if selected is off). | |
1308 | */ | |
1309 | static void ad_port_selection_logic(struct port *port) | |
1310 | { | |
1311 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1312 | struct port *last_port = NULL, *curr_port; | |
1313 | int found = 0; | |
1314 | ||
1315 | // if the port is already Selected, do nothing | |
1316 | if (port->sm_vars & AD_PORT_SELECTED) { | |
1317 | return; | |
1318 | } | |
1319 | ||
1320 | // if the port is connected to other aggregator, detach it | |
1321 | if (port->aggregator) { | |
1322 | // detach the port from its former aggregator | |
1323 | temp_aggregator=port->aggregator; | |
1324 | for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) { | |
1325 | if (curr_port == port) { | |
1326 | temp_aggregator->num_of_ports--; | |
1327 | if (!last_port) {// if it is the first port attached to the aggregator | |
1328 | temp_aggregator->lag_ports=port->next_port_in_aggregator; | |
1329 | } else {// not the first port attached to the aggregator | |
1330 | last_port->next_port_in_aggregator=port->next_port_in_aggregator; | |
1331 | } | |
1332 | ||
1333 | // clear the port's relations to this aggregator | |
1334 | port->aggregator = NULL; | |
1335 | port->next_port_in_aggregator=NULL; | |
1336 | port->actor_port_aggregator_identifier=0; | |
1337 | ||
1338 | dprintk("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier); | |
1339 | // if the aggregator is empty, clear its parameters, and set it ready to be attached | |
1340 | if (!temp_aggregator->lag_ports) { | |
1341 | ad_clear_agg(temp_aggregator); | |
1342 | } | |
1343 | break; | |
1344 | } | |
1345 | } | |
1346 | if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list | |
4e0952c7 | 1347 | printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was " |
1da177e4 | 1348 | "related to aggregator %d but was not on its port list\n", |
4e0952c7 | 1349 | port->slave->dev->master->name, |
1da177e4 LT |
1350 | port->actor_port_number, port->slave->dev->name, |
1351 | port->aggregator->aggregator_identifier); | |
1352 | } | |
1353 | } | |
1354 | // search on all aggregators for a suitable aggregator for this port | |
1355 | for (aggregator = __get_first_agg(port); aggregator; | |
1356 | aggregator = __get_next_agg(aggregator)) { | |
1357 | ||
1358 | // keep a free aggregator for later use(if needed) | |
1359 | if (!aggregator->lag_ports) { | |
1360 | if (!free_aggregator) { | |
1361 | free_aggregator=aggregator; | |
1362 | } | |
1363 | continue; | |
1364 | } | |
1365 | // check if current aggregator suits us | |
1366 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND | |
1367 | !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper_system)) && | |
1368 | (aggregator->partner_system_priority == port->partner_oper_system_priority) && | |
1369 | (aggregator->partner_oper_aggregator_key == port->partner_oper_key) | |
1370 | ) && | |
1371 | ((MAC_ADDRESS_COMPARE(&(port->partner_oper_system), &(null_mac_addr)) && // partner answers | |
1372 | !aggregator->is_individual) // but is not individual OR | |
1373 | ) | |
1374 | ) { | |
1375 | // attach to the founded aggregator | |
1376 | port->aggregator = aggregator; | |
1377 | port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; | |
1378 | port->next_port_in_aggregator=aggregator->lag_ports; | |
1379 | port->aggregator->num_of_ports++; | |
1380 | aggregator->lag_ports=port; | |
1381 | dprintk("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1382 | ||
1383 | // mark this port as selected | |
1384 | port->sm_vars |= AD_PORT_SELECTED; | |
1385 | found = 1; | |
1386 | break; | |
1387 | } | |
1388 | } | |
1389 | ||
1390 | // the port couldn't find an aggregator - attach it to a new aggregator | |
1391 | if (!found) { | |
1392 | if (free_aggregator) { | |
1393 | // assign port a new aggregator | |
1394 | port->aggregator = free_aggregator; | |
1395 | port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; | |
1396 | ||
1397 | // update the new aggregator's parameters | |
1398 | // if port was responsed from the end-user | |
1399 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex | |
1400 | port->aggregator->is_individual = 0; | |
1401 | } else { | |
1402 | port->aggregator->is_individual = 1; | |
1403 | } | |
1404 | ||
1405 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1406 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
1407 | port->aggregator->partner_system=port->partner_oper_system; | |
1408 | port->aggregator->partner_system_priority = port->partner_oper_system_priority; | |
1409 | port->aggregator->partner_oper_aggregator_key = port->partner_oper_key; | |
1410 | port->aggregator->receive_state = 1; | |
1411 | port->aggregator->transmit_state = 1; | |
1412 | port->aggregator->lag_ports = port; | |
1413 | port->aggregator->num_of_ports++; | |
1414 | ||
1415 | // mark this port as selected | |
1416 | port->sm_vars |= AD_PORT_SELECTED; | |
1417 | ||
1418 | dprintk("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1419 | } else { | |
4e0952c7 MW |
1420 | printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n", |
1421 | port->slave->dev->master->name, | |
1da177e4 LT |
1422 | port->actor_port_number, port->slave->dev->name); |
1423 | } | |
1424 | } | |
1425 | // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports | |
1426 | // else set ready=FALSE in all aggregator's ports | |
1427 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1428 | ||
fd989c83 JV |
1429 | aggregator = __get_first_agg(port); |
1430 | ad_agg_selection_logic(aggregator); | |
1431 | } | |
1432 | ||
1433 | /* | |
1434 | * Decide if "agg" is a better choice for the new active aggregator that | |
1435 | * the current best, according to the ad_select policy. | |
1436 | */ | |
1437 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1438 | struct aggregator *curr) | |
1439 | { | |
1440 | /* | |
1441 | * 0. If no best, select current. | |
1442 | * | |
1443 | * 1. If the current agg is not individual, and the best is | |
1444 | * individual, select current. | |
1445 | * | |
1446 | * 2. If current agg is individual and the best is not, keep best. | |
1447 | * | |
1448 | * 3. Therefore, current and best are both individual or both not | |
1449 | * individual, so: | |
1450 | * | |
1451 | * 3a. If current agg partner replied, and best agg partner did not, | |
1452 | * select current. | |
1453 | * | |
1454 | * 3b. If current agg partner did not reply and best agg partner | |
1455 | * did reply, keep best. | |
1456 | * | |
1457 | * 4. Therefore, current and best both have partner replies or | |
1458 | * both do not, so perform selection policy: | |
1459 | * | |
1460 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1461 | * select by bandwidth. | |
1462 | * | |
1463 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1464 | */ | |
1465 | if (!best) | |
1466 | return curr; | |
1467 | ||
1468 | if (!curr->is_individual && best->is_individual) | |
1469 | return curr; | |
1470 | ||
1471 | if (curr->is_individual && !best->is_individual) | |
1472 | return best; | |
1473 | ||
1474 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1475 | return curr; | |
1476 | ||
1477 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1478 | return best; | |
1479 | ||
1480 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1481 | case BOND_AD_COUNT: | |
1482 | if (curr->num_of_ports > best->num_of_ports) | |
1483 | return curr; | |
1484 | ||
1485 | if (curr->num_of_ports < best->num_of_ports) | |
1486 | return best; | |
1487 | ||
1488 | /*FALLTHROUGH*/ | |
1489 | case BOND_AD_STABLE: | |
1490 | case BOND_AD_BANDWIDTH: | |
1491 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1492 | return curr; | |
1493 | ||
1494 | break; | |
1495 | ||
1496 | default: | |
1497 | printk(KERN_WARNING DRV_NAME | |
1498 | ": %s: Impossible agg select mode %d\n", | |
1499 | curr->slave->dev->master->name, | |
1500 | __get_agg_selection_mode(curr->lag_ports)); | |
1501 | break; | |
1da177e4 | 1502 | } |
fd989c83 JV |
1503 | |
1504 | return best; | |
1da177e4 LT |
1505 | } |
1506 | ||
1507 | /** | |
1508 | * ad_agg_selection_logic - select an aggregation group for a team | |
1509 | * @aggregator: the aggregator we're looking at | |
1510 | * | |
1511 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1512 | * |
1513 | * The logic of this function is to select the aggregator according to | |
1514 | * the ad_select policy: | |
1515 | * | |
1516 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1517 | * it, and to reselect the active aggregator only if the previous | |
1518 | * aggregator has no more ports related to it. | |
1519 | * | |
1520 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1521 | * bandwidth, and reselect whenever a link state change takes place or the | |
1522 | * set of slaves in the bond changes. | |
1523 | * | |
1524 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1525 | * (slaves), and reselect whenever a link state change takes place or the | |
1526 | * set of slaves in the bond changes. | |
1da177e4 LT |
1527 | * |
1528 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1529 | * __get_active_agg() won't work correctly. This function should be better | |
1530 | * called with the bond itself, and retrieve the first agg from it. | |
1531 | */ | |
fd989c83 | 1532 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1533 | { |
fd989c83 | 1534 | struct aggregator *best, *active, *origin; |
1da177e4 | 1535 | struct port *port; |
1da177e4 | 1536 | |
fd989c83 | 1537 | origin = agg; |
1da177e4 | 1538 | |
fd989c83 JV |
1539 | active = __get_active_agg(agg); |
1540 | best = active; | |
1da177e4 | 1541 | |
1da177e4 | 1542 | do { |
fd989c83 JV |
1543 | agg->is_active = 0; |
1544 | ||
1545 | if (agg->num_of_ports) | |
1546 | best = ad_agg_selection_test(best, agg); | |
1547 | ||
1548 | } while ((agg = __get_next_agg(agg))); | |
1549 | ||
1550 | if (best && | |
1551 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
1552 | /* | |
1553 | * For the STABLE policy, don't replace the old active | |
1554 | * aggregator if it's still active (it has an answering | |
1555 | * partner) or if both the best and active don't have an | |
1556 | * answering partner. | |
1557 | */ | |
1558 | if (active && active->lag_ports && | |
1559 | active->lag_ports->is_enabled && | |
1560 | (__agg_has_partner(active) || | |
1561 | (!__agg_has_partner(active) && !__agg_has_partner(best)))) { | |
1562 | if (!(!active->actor_oper_aggregator_key && | |
1563 | best->actor_oper_aggregator_key)) { | |
1564 | best = NULL; | |
1565 | active->is_active = 1; | |
1da177e4 LT |
1566 | } |
1567 | } | |
fd989c83 | 1568 | } |
1da177e4 | 1569 | |
fd989c83 JV |
1570 | if (best && (best == active)) { |
1571 | best = NULL; | |
1572 | active->is_active = 1; | |
1da177e4 LT |
1573 | } |
1574 | ||
1575 | // if there is new best aggregator, activate it | |
fd989c83 JV |
1576 | if (best) { |
1577 | dprintk("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1578 | best->aggregator_identifier, best->num_of_ports, | |
1579 | best->actor_oper_aggregator_key, | |
1580 | best->partner_oper_aggregator_key, | |
1581 | best->is_individual, best->is_active); | |
1582 | dprintk("best ports %p slave %p %s\n", | |
1583 | best->lag_ports, best->slave, | |
1584 | best->slave ? best->slave->dev->name : "NULL"); | |
1585 | ||
1586 | for (agg = __get_first_agg(best->lag_ports); agg; | |
1587 | agg = __get_next_agg(agg)) { | |
1588 | ||
1589 | dprintk("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1590 | agg->aggregator_identifier, agg->num_of_ports, | |
1591 | agg->actor_oper_aggregator_key, | |
1592 | agg->partner_oper_aggregator_key, | |
1593 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1594 | } |
1595 | ||
1596 | // check if any partner replys | |
fd989c83 JV |
1597 | if (best->is_individual) { |
1598 | printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad" | |
1599 | " response from the link partner for any" | |
1600 | " adapters in the bond\n", | |
1601 | best->slave->dev->master->name); | |
1da177e4 LT |
1602 | } |
1603 | ||
fd989c83 JV |
1604 | best->is_active = 1; |
1605 | dprintk("LAG %d chosen as the active LAG\n", | |
1606 | best->aggregator_identifier); | |
1607 | dprintk("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1608 | best->aggregator_identifier, best->num_of_ports, | |
1609 | best->actor_oper_aggregator_key, | |
1610 | best->partner_oper_aggregator_key, | |
1611 | best->is_individual, best->is_active); | |
1da177e4 LT |
1612 | |
1613 | // disable the ports that were related to the former active_aggregator | |
fd989c83 JV |
1614 | if (active) { |
1615 | for (port = active->lag_ports; port; | |
1616 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1617 | __disable_port(port); |
1618 | } | |
1619 | } | |
1620 | } | |
1621 | ||
fd989c83 JV |
1622 | /* |
1623 | * if the selected aggregator is of join individuals | |
1624 | * (partner_system is NULL), enable their ports | |
1625 | */ | |
1626 | active = __get_active_agg(origin); | |
1da177e4 | 1627 | |
fd989c83 JV |
1628 | if (active) { |
1629 | if (!__agg_has_partner(active)) { | |
1630 | for (port = active->lag_ports; port; | |
1631 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1632 | __enable_port(port); |
1633 | } | |
1634 | } | |
1635 | } | |
fd989c83 JV |
1636 | |
1637 | if (origin->slave) { | |
1638 | struct bonding *bond; | |
1639 | ||
1640 | bond = bond_get_bond_by_slave(origin->slave); | |
1641 | if (bond) | |
1642 | bond_3ad_set_carrier(bond); | |
1643 | } | |
1da177e4 LT |
1644 | } |
1645 | ||
1646 | /** | |
1647 | * ad_clear_agg - clear a given aggregator's parameters | |
1648 | * @aggregator: the aggregator we're looking at | |
1649 | * | |
1650 | */ | |
1651 | static void ad_clear_agg(struct aggregator *aggregator) | |
1652 | { | |
1653 | if (aggregator) { | |
1654 | aggregator->is_individual = 0; | |
1655 | aggregator->actor_admin_aggregator_key = 0; | |
1656 | aggregator->actor_oper_aggregator_key = 0; | |
1657 | aggregator->partner_system = null_mac_addr; | |
1658 | aggregator->partner_system_priority = 0; | |
1659 | aggregator->partner_oper_aggregator_key = 0; | |
1660 | aggregator->receive_state = 0; | |
1661 | aggregator->transmit_state = 0; | |
1662 | aggregator->lag_ports = NULL; | |
1663 | aggregator->is_active = 0; | |
1664 | aggregator->num_of_ports = 0; | |
1665 | dprintk("LAG %d was cleared\n", aggregator->aggregator_identifier); | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | /** | |
1670 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1671 | * @aggregator: the aggregator we're looking at | |
1672 | * | |
1673 | */ | |
1674 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1675 | { | |
1676 | if (aggregator) { | |
1677 | ad_clear_agg(aggregator); | |
1678 | ||
1679 | aggregator->aggregator_mac_address = null_mac_addr; | |
1680 | aggregator->aggregator_identifier = 0; | |
1681 | aggregator->slave = NULL; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | /** | |
1686 | * ad_initialize_port - initialize a given port's parameters | |
1687 | * @aggregator: the aggregator we're looking at | |
1688 | * @lacp_fast: boolean. whether fast periodic should be used | |
1689 | * | |
1690 | */ | |
1691 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1692 | { | |
1693 | 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; | |
1699 | port->ntt = 0; | |
1700 | 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 | ||
1705 | if (lacp_fast) { | |
1706 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
1707 | } | |
1708 | ||
1709 | port->partner_admin_system = null_mac_addr; | |
1710 | port->partner_oper_system = null_mac_addr; | |
1711 | port->partner_admin_system_priority = 0xffff; | |
1712 | port->partner_oper_system_priority = 0xffff; | |
1713 | port->partner_admin_key = 1; | |
1714 | port->partner_oper_key = 1; | |
1715 | port->partner_admin_port_number = 1; | |
1716 | port->partner_oper_port_number = 1; | |
1717 | port->partner_admin_port_priority = 0xff; | |
1718 | port->partner_oper_port_priority = 0xff; | |
1719 | port->partner_admin_port_state = 1; | |
1720 | port->partner_oper_port_state = 1; | |
1721 | port->is_enabled = 1; | |
1722 | // ****** private parameters ****** | |
1723 | port->sm_vars = 0x3; | |
1724 | port->sm_rx_state = 0; | |
1725 | port->sm_rx_timer_counter = 0; | |
1726 | port->sm_periodic_state = 0; | |
1727 | port->sm_periodic_timer_counter = 0; | |
1728 | port->sm_mux_state = 0; | |
1729 | port->sm_mux_timer_counter = 0; | |
1730 | port->sm_tx_state = 0; | |
1731 | port->sm_tx_timer_counter = 0; | |
1732 | port->slave = NULL; | |
1733 | port->aggregator = NULL; | |
1734 | port->next_port_in_aggregator = NULL; | |
1735 | port->transaction_id = 0; | |
1736 | ||
1737 | ad_initialize_lacpdu(&(port->lacpdu)); | |
1738 | } | |
1739 | } | |
1740 | ||
1741 | /** | |
1742 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1743 | * @port: the port we're looking at | |
1744 | * | |
1745 | * Enable @port if it's in an active aggregator | |
1746 | */ | |
1747 | static void ad_enable_collecting_distributing(struct port *port) | |
1748 | { | |
1749 | if (port->aggregator->is_active) { | |
1750 | dprintk("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1751 | __enable_port(port); | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | /** | |
1756 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1757 | * @port: the port we're looking at | |
1758 | * | |
1759 | */ | |
1760 | static void ad_disable_collecting_distributing(struct port *port) | |
1761 | { | |
1762 | if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { | |
1763 | dprintk("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1764 | __disable_port(port); | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | #if 0 | |
1769 | /** | |
1770 | * ad_marker_info_send - send a marker information frame | |
1771 | * @port: the port we're looking at | |
1772 | * | |
1773 | * This function does nothing since we decided not to implement send and handle | |
1774 | * response for marker PDU's, in this stage, but only to respond to marker | |
1775 | * information. | |
1776 | */ | |
1777 | static void ad_marker_info_send(struct port *port) | |
1778 | { | |
1c3f0b8e | 1779 | struct bond_marker marker; |
1da177e4 LT |
1780 | u16 index; |
1781 | ||
1782 | // fill the marker PDU with the appropriate values | |
1783 | marker.subtype = 0x02; | |
1784 | marker.version_number = 0x01; | |
1785 | marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; | |
1786 | marker.marker_length = 0x16; | |
1787 | // convert requester_port to Big Endian | |
1788 | marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); | |
1789 | marker.requester_system = port->actor_system; | |
1790 | // convert requester_port(u32) to Big Endian | |
1791 | marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24)); | |
1792 | marker.pad = 0; | |
1793 | marker.tlv_type_terminator = 0x00; | |
1794 | marker.terminator_length = 0x00; | |
1795 | for (index=0; index<90; index++) { | |
1796 | marker.reserved_90[index]=0; | |
1797 | } | |
1798 | ||
1799 | // send the marker information | |
1800 | if (ad_marker_send(port, &marker) >= 0) { | |
1801 | dprintk("Sent Marker Information on port %d\n", port->actor_port_number); | |
1802 | } | |
1803 | } | |
1804 | #endif | |
1805 | ||
1806 | /** | |
1807 | * ad_marker_info_received - handle receive of a Marker information frame | |
1808 | * @marker_info: Marker info received | |
1809 | * @port: the port we're looking at | |
1810 | * | |
1811 | */ | |
1c3f0b8e MD |
1812 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1813 | struct port *port) | |
1da177e4 | 1814 | { |
1c3f0b8e | 1815 | struct bond_marker marker; |
1da177e4 LT |
1816 | |
1817 | // copy the received marker data to the response marker | |
1818 | //marker = *marker_info; | |
1c3f0b8e | 1819 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
1da177e4 LT |
1820 | // change the marker subtype to marker response |
1821 | marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE; | |
1822 | // send the marker response | |
1823 | ||
1824 | if (ad_marker_send(port, &marker) >= 0) { | |
1825 | dprintk("Sent Marker Response on port %d\n", port->actor_port_number); | |
1826 | } | |
1827 | } | |
1828 | ||
1829 | /** | |
1830 | * ad_marker_response_received - handle receive of a marker response frame | |
1831 | * @marker: marker PDU received | |
1832 | * @port: the port we're looking at | |
1833 | * | |
1834 | * This function does nothing since we decided not to implement send and handle | |
1835 | * response for marker PDU's, in this stage, but only to respond to marker | |
1836 | * information. | |
1837 | */ | |
1c3f0b8e MD |
1838 | static void ad_marker_response_received(struct bond_marker *marker, |
1839 | struct port *port) | |
1da177e4 LT |
1840 | { |
1841 | marker=NULL; // just to satisfy the compiler | |
1842 | port=NULL; // just to satisfy the compiler | |
1843 | // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW | |
1844 | } | |
1845 | ||
1846 | /** | |
1847 | * ad_initialize_lacpdu - initialize a given lacpdu structure | |
1848 | * @lacpdu: lacpdu structure to initialize | |
1849 | * | |
1850 | */ | |
1851 | static void ad_initialize_lacpdu(struct lacpdu *lacpdu) | |
1852 | { | |
1853 | u16 index; | |
1854 | ||
1855 | // initialize lacpdu data | |
1856 | lacpdu->subtype = 0x01; | |
1857 | lacpdu->version_number = 0x01; | |
1858 | lacpdu->tlv_type_actor_info = 0x01; | |
1859 | lacpdu->actor_information_length = 0x14; | |
1860 | // lacpdu->actor_system_priority updated on send | |
1861 | // lacpdu->actor_system updated on send | |
1862 | // lacpdu->actor_key updated on send | |
1863 | // lacpdu->actor_port_priority updated on send | |
1864 | // lacpdu->actor_port updated on send | |
1865 | // lacpdu->actor_state updated on send | |
1866 | lacpdu->tlv_type_partner_info = 0x02; | |
1867 | lacpdu->partner_information_length = 0x14; | |
1868 | for (index=0; index<=2; index++) { | |
1869 | lacpdu->reserved_3_1[index]=0; | |
1870 | } | |
1871 | // lacpdu->partner_system_priority updated on send | |
1872 | // lacpdu->partner_system updated on send | |
1873 | // lacpdu->partner_key updated on send | |
1874 | // lacpdu->partner_port_priority updated on send | |
1875 | // lacpdu->partner_port updated on send | |
1876 | // lacpdu->partner_state updated on send | |
1877 | for (index=0; index<=2; index++) { | |
1878 | lacpdu->reserved_3_2[index]=0; | |
1879 | } | |
1880 | lacpdu->tlv_type_collector_info = 0x03; | |
1881 | lacpdu->collector_information_length= 0x10; | |
d3bb52b0 | 1882 | lacpdu->collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY); |
1da177e4 LT |
1883 | for (index=0; index<=11; index++) { |
1884 | lacpdu->reserved_12[index]=0; | |
1885 | } | |
1886 | lacpdu->tlv_type_terminator = 0x00; | |
1887 | lacpdu->terminator_length = 0; | |
1888 | for (index=0; index<=49; index++) { | |
1889 | lacpdu->reserved_50[index]=0; | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | ////////////////////////////////////////////////////////////////////////////////////// | |
1894 | // ================= AD exported functions to the main bonding code ================== | |
1895 | ////////////////////////////////////////////////////////////////////////////////////// | |
1896 | ||
1897 | // Check aggregators status in team every T seconds | |
1898 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1899 | ||
fd989c83 JV |
1900 | /* |
1901 | * bond_3ad_initiate_agg_selection(struct bonding *bond) | |
1902 | * | |
1903 | * Set the aggregation selection timer, to initiate an agg selection in | |
1904 | * the very near future. Called during first initialization, and during | |
1905 | * any down to up transitions of the bond. | |
1906 | */ | |
1907 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1908 | { | |
1909 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
1910 | BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select; | |
1911 | } | |
1912 | ||
1da177e4 LT |
1913 | static u16 aggregator_identifier; |
1914 | ||
1915 | /** | |
1916 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1917 | * @bond: bonding struct to work on | |
1918 | * @tick_resolution: tick duration (millisecond resolution) | |
1919 | * @lacp_fast: boolean. whether fast periodic should be used | |
1920 | * | |
1921 | * Can be called only after the mac address of the bond is set. | |
1922 | */ | |
1923 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) | |
1924 | { | |
1925 | // check that the bond is not initialized yet | |
1926 | if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) { | |
1927 | ||
1928 | aggregator_identifier = 0; | |
1929 | ||
1930 | BOND_AD_INFO(bond).lacp_fast = lacp_fast; | |
1931 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; | |
1932 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1933 | ||
1934 | // initialize how many times this module is called in one second(should be about every 100ms) | |
1935 | ad_ticks_per_sec = tick_resolution; | |
1936 | ||
fd989c83 JV |
1937 | bond_3ad_initiate_agg_selection(bond, |
1938 | AD_AGGREGATOR_SELECTION_TIMER * | |
1939 | ad_ticks_per_sec); | |
1da177e4 LT |
1940 | } |
1941 | } | |
1942 | ||
1943 | /** | |
1944 | * bond_3ad_bind_slave - initialize a slave's port | |
1945 | * @slave: slave struct to work on | |
1946 | * | |
1947 | * Returns: 0 on success | |
1948 | * < 0 on error | |
1949 | */ | |
1950 | int bond_3ad_bind_slave(struct slave *slave) | |
1951 | { | |
1952 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1953 | struct port *port; | |
1954 | struct aggregator *aggregator; | |
1955 | ||
1956 | if (bond == NULL) { | |
4e0952c7 MW |
1957 | printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n", |
1958 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
1959 | return -1; |
1960 | } | |
1961 | ||
1962 | //check that the slave has not been intialized yet. | |
1963 | if (SLAVE_AD_INFO(slave).port.slave != slave) { | |
1964 | ||
1965 | // port initialization | |
1966 | port = &(SLAVE_AD_INFO(slave).port); | |
1967 | ||
1968 | ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); | |
1969 | ||
1970 | port->slave = slave; | |
1971 | port->actor_port_number = SLAVE_AD_INFO(slave).id; | |
1972 | // key is determined according to the link speed, duplex and user key(which is yet not supported) | |
1973 | // ------------------------------------------------------------ | |
1974 | // Port key : | User key | Speed |Duplex| | |
1975 | // ------------------------------------------------------------ | |
1976 | // 16 6 1 0 | |
1977 | port->actor_admin_port_key = 0; // initialize this parameter | |
1978 | port->actor_admin_port_key |= __get_duplex(port); | |
1979 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1980 | port->actor_oper_port_key = port->actor_admin_port_key; | |
1981 | // if the port is not full duplex, then the port should be not lacp Enabled | |
1982 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { | |
1983 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
1984 | } | |
1985 | // actor system is the bond's system | |
1986 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
1987 | // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) | |
1988 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1989 | port->aggregator = NULL; | |
1990 | port->next_port_in_aggregator = NULL; | |
1991 | ||
1992 | __disable_port(port); | |
1993 | __initialize_port_locks(port); | |
1994 | ||
1995 | ||
1996 | // aggregator initialization | |
1997 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1998 | ||
1999 | ad_initialize_agg(aggregator); | |
2000 | ||
2001 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
2002 | aggregator->aggregator_identifier = (++aggregator_identifier); | |
2003 | aggregator->slave = slave; | |
2004 | aggregator->is_active = 0; | |
2005 | aggregator->num_of_ports = 0; | |
2006 | } | |
2007 | ||
2008 | return 0; | |
2009 | } | |
2010 | ||
2011 | /** | |
2012 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
2013 | * @slave: slave struct to work on | |
2014 | * | |
2015 | * Search for the aggregator that is related to this port, remove the | |
2016 | * aggregator and assign another aggregator for other port related to it | |
2017 | * (if any), and remove the port. | |
2018 | */ | |
2019 | void bond_3ad_unbind_slave(struct slave *slave) | |
2020 | { | |
2021 | struct port *port, *prev_port, *temp_port; | |
2022 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
2023 | int select_new_active_agg = 0; | |
2024 | ||
2025 | // find the aggregator related to this slave | |
2026 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
2027 | ||
2028 | // find the port related to this slave | |
2029 | port = &(SLAVE_AD_INFO(slave).port); | |
2030 | ||
2031 | // if slave is null, the whole port is not initialized | |
2032 | if (!port->slave) { | |
4e0952c7 MW |
2033 | printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to " |
2034 | "unbind an uninitialized port on %s\n", | |
2035 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2036 | return; |
2037 | } | |
2038 | ||
2039 | dprintk("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier); | |
2040 | ||
2041 | /* Tell the partner that this port is not suitable for aggregation */ | |
2042 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
2043 | __update_lacpdu_from_port(port); | |
2044 | ad_lacpdu_send(port); | |
2045 | ||
2046 | // check if this aggregator is occupied | |
2047 | if (aggregator->lag_ports) { | |
2048 | // check if there are other ports related to this aggregator except | |
2049 | // the port related to this slave(thats ensure us that there is a | |
2050 | // reason to search for new aggregator, and that we will find one | |
2051 | if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { | |
2052 | // find new aggregator for the related port(s) | |
2053 | new_aggregator = __get_first_agg(port); | |
2054 | for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { | |
2055 | // if the new aggregator is empty, or it connected to to our port only | |
2056 | if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) { | |
2057 | break; | |
2058 | } | |
2059 | } | |
2060 | // if new aggregator found, copy the aggregator's parameters | |
2061 | // and connect the related lag_ports to the new aggregator | |
2062 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
2063 | dprintk("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier); | |
2064 | ||
2065 | if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { | |
4e0952c7 MW |
2066 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2067 | aggregator->slave->dev->master->name); | |
1da177e4 LT |
2068 | // select new active aggregator |
2069 | select_new_active_agg = 1; | |
2070 | } | |
2071 | ||
2072 | new_aggregator->is_individual = aggregator->is_individual; | |
2073 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
2074 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
2075 | new_aggregator->partner_system = aggregator->partner_system; | |
2076 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
2077 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
2078 | new_aggregator->receive_state = aggregator->receive_state; | |
2079 | new_aggregator->transmit_state = aggregator->transmit_state; | |
2080 | new_aggregator->lag_ports = aggregator->lag_ports; | |
2081 | new_aggregator->is_active = aggregator->is_active; | |
2082 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
2083 | ||
2084 | // update the information that is written on the ports about the aggregator | |
2085 | for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) { | |
2086 | temp_port->aggregator=new_aggregator; | |
2087 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; | |
2088 | } | |
2089 | ||
2090 | // clear the aggregator | |
2091 | ad_clear_agg(aggregator); | |
2092 | ||
2093 | if (select_new_active_agg) { | |
2094 | ad_agg_selection_logic(__get_first_agg(port)); | |
2095 | } | |
2096 | } else { | |
4e0952c7 MW |
2097 | printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, " |
2098 | "and could not find a new aggregator for its ports\n", | |
2099 | slave->dev->master->name); | |
1da177e4 LT |
2100 | } |
2101 | } else { // in case that the only port related to this aggregator is the one we want to remove | |
2102 | select_new_active_agg = aggregator->is_active; | |
2103 | // clear the aggregator | |
2104 | ad_clear_agg(aggregator); | |
2105 | if (select_new_active_agg) { | |
4e0952c7 MW |
2106 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2107 | slave->dev->master->name); | |
1da177e4 LT |
2108 | // select new active aggregator |
2109 | ad_agg_selection_logic(__get_first_agg(port)); | |
2110 | } | |
2111 | } | |
2112 | } | |
2113 | ||
2114 | dprintk("Unbinding port %d\n", port->actor_port_number); | |
2115 | // find the aggregator that this port is connected to | |
2116 | temp_aggregator = __get_first_agg(port); | |
2117 | for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { | |
2118 | prev_port = NULL; | |
2119 | // search the port in the aggregator's related ports | |
2120 | for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { | |
2121 | if (temp_port == port) { // the aggregator found - detach the port from this aggregator | |
2122 | if (prev_port) { | |
2123 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; | |
2124 | } else { | |
2125 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; | |
2126 | } | |
2127 | temp_aggregator->num_of_ports--; | |
2128 | if (temp_aggregator->num_of_ports==0) { | |
2129 | select_new_active_agg = temp_aggregator->is_active; | |
2130 | // clear the aggregator | |
2131 | ad_clear_agg(temp_aggregator); | |
2132 | if (select_new_active_agg) { | |
4e0952c7 MW |
2133 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2134 | slave->dev->master->name); | |
1da177e4 LT |
2135 | // select new active aggregator |
2136 | ad_agg_selection_logic(__get_first_agg(port)); | |
2137 | } | |
2138 | } | |
2139 | break; | |
2140 | } | |
2141 | } | |
2142 | } | |
2143 | port->slave=NULL; | |
2144 | } | |
2145 | ||
2146 | /** | |
2147 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2148 | * @bond: bonding struct to work on | |
2149 | * | |
2150 | * The state machine handling concept in this module is to check every tick | |
2151 | * which state machine should operate any function. The execution order is | |
2152 | * round robin, so when we have an interaction between state machines, the | |
2153 | * reply of one to each other might be delayed until next tick. | |
2154 | * | |
2155 | * This function also complete the initialization when the agg_select_timer | |
2156 | * times out, and it selects an aggregator for the ports that are yet not | |
2157 | * related to any aggregator, and selects the active aggregator for a bond. | |
2158 | */ | |
1b76b316 | 2159 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2160 | { |
1b76b316 JV |
2161 | struct bonding *bond = container_of(work, struct bonding, |
2162 | ad_work.work); | |
1da177e4 LT |
2163 | struct port *port; |
2164 | struct aggregator *aggregator; | |
2165 | ||
2166 | read_lock(&bond->lock); | |
2167 | ||
2168 | if (bond->kill_timers) { | |
2169 | goto out; | |
2170 | } | |
2171 | ||
2172 | //check if there are any slaves | |
2173 | if (bond->slave_cnt == 0) { | |
2174 | goto re_arm; | |
2175 | } | |
2176 | ||
2177 | // check if agg_select_timer timer after initialize is timed out | |
2178 | if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
2179 | // select the active aggregator for the bond | |
2180 | if ((port = __get_first_port(bond))) { | |
2181 | if (!port->slave) { | |
4e0952c7 MW |
2182 | printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is " |
2183 | "uninitialized\n", bond->dev->name); | |
1da177e4 LT |
2184 | goto re_arm; |
2185 | } | |
2186 | ||
2187 | aggregator = __get_first_agg(port); | |
2188 | ad_agg_selection_logic(aggregator); | |
2189 | } | |
f0c76d61 | 2190 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2191 | } |
2192 | ||
2193 | // for each port run the state machines | |
2194 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2195 | if (!port->slave) { | |
4e0952c7 MW |
2196 | printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized " |
2197 | "port\n", bond->dev->name); | |
1da177e4 LT |
2198 | goto re_arm; |
2199 | } | |
2200 | ||
2201 | ad_rx_machine(NULL, port); | |
2202 | ad_periodic_machine(port); | |
2203 | ad_port_selection_logic(port); | |
2204 | ad_mux_machine(port); | |
2205 | ad_tx_machine(port); | |
2206 | ||
2207 | // turn off the BEGIN bit, since we already handled it | |
2208 | if (port->sm_vars & AD_PORT_BEGIN) { | |
2209 | port->sm_vars &= ~AD_PORT_BEGIN; | |
2210 | } | |
2211 | } | |
2212 | ||
2213 | re_arm: | |
1b76b316 | 2214 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2215 | out: |
2216 | read_unlock(&bond->lock); | |
2217 | } | |
2218 | ||
2219 | /** | |
2220 | * bond_3ad_rx_indication - handle a received frame | |
2221 | * @lacpdu: received lacpdu | |
2222 | * @slave: slave struct to work on | |
2223 | * @length: length of the data received | |
2224 | * | |
2225 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2226 | * received frames (loopback). Since only the payload is given to this | |
2227 | * function, it check for loopback. | |
2228 | */ | |
2229 | static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) | |
2230 | { | |
2231 | struct port *port; | |
2232 | ||
2233 | if (length >= sizeof(struct lacpdu)) { | |
2234 | ||
2235 | port = &(SLAVE_AD_INFO(slave).port); | |
2236 | ||
2237 | if (!port->slave) { | |
4e0952c7 MW |
2238 | printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is " |
2239 | "uninitialized\n", slave->dev->name, slave->dev->master->name); | |
1da177e4 LT |
2240 | return; |
2241 | } | |
2242 | ||
2243 | switch (lacpdu->subtype) { | |
2244 | case AD_TYPE_LACPDU: | |
1da177e4 LT |
2245 | dprintk("Received LACPDU on port %d\n", port->actor_port_number); |
2246 | ad_rx_machine(lacpdu, port); | |
2247 | break; | |
2248 | ||
2249 | case AD_TYPE_MARKER: | |
2250 | // No need to convert fields to Little Endian since we don't use the marker's fields. | |
2251 | ||
1c3f0b8e | 2252 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 LT |
2253 | case AD_MARKER_INFORMATION_SUBTYPE: |
2254 | dprintk("Received Marker Information on port %d\n", port->actor_port_number); | |
1c3f0b8e | 2255 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2256 | break; |
2257 | ||
2258 | case AD_MARKER_RESPONSE_SUBTYPE: | |
2259 | dprintk("Received Marker Response on port %d\n", port->actor_port_number); | |
1c3f0b8e | 2260 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2261 | break; |
2262 | ||
2263 | default: | |
2264 | dprintk("Received an unknown Marker subtype on slot %d\n", port->actor_port_number); | |
2265 | } | |
2266 | } | |
2267 | } | |
2268 | } | |
2269 | ||
2270 | /** | |
2271 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2272 | * @slave: slave struct to work on | |
2273 | * | |
2274 | * Handle reselection of aggregator (if needed) for this port. | |
2275 | */ | |
2276 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2277 | { | |
2278 | struct port *port; | |
2279 | ||
2280 | port = &(SLAVE_AD_INFO(slave).port); | |
2281 | ||
2282 | // if slave is null, the whole port is not initialized | |
2283 | if (!port->slave) { | |
4e0952c7 MW |
2284 | printk(KERN_WARNING DRV_NAME ": Warning: %s: speed " |
2285 | "changed for uninitialized port on %s\n", | |
2286 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2287 | return; |
2288 | } | |
2289 | ||
2290 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
2291 | port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
2292 | dprintk("Port %d changed speed\n", port->actor_port_number); | |
2293 | // there is no need to reselect a new aggregator, just signal the | |
2294 | // state machines to reinitialize | |
2295 | port->sm_vars |= AD_PORT_BEGIN; | |
2296 | } | |
2297 | ||
2298 | /** | |
2299 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2300 | * @slave: slave struct to work on | |
2301 | * | |
2302 | * Handle reselection of aggregator (if needed) for this port. | |
2303 | */ | |
2304 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2305 | { | |
2306 | struct port *port; | |
2307 | ||
2308 | port=&(SLAVE_AD_INFO(slave).port); | |
2309 | ||
2310 | // if slave is null, the whole port is not initialized | |
2311 | if (!port->slave) { | |
4e0952c7 MW |
2312 | printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed " |
2313 | "for uninitialized port on %s\n", | |
2314 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2315 | return; |
2316 | } | |
2317 | ||
2318 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
2319 | port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); | |
2320 | dprintk("Port %d changed duplex\n", port->actor_port_number); | |
2321 | // there is no need to reselect a new aggregator, just signal the | |
2322 | // state machines to reinitialize | |
2323 | port->sm_vars |= AD_PORT_BEGIN; | |
2324 | } | |
2325 | ||
2326 | /** | |
2327 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2328 | * @slave: slave struct to work on | |
2329 | * @status: whether the link is now up or down | |
2330 | * | |
2331 | * Handle reselection of aggregator (if needed) for this port. | |
2332 | */ | |
2333 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2334 | { | |
2335 | struct port *port; | |
2336 | ||
2337 | port = &(SLAVE_AD_INFO(slave).port); | |
2338 | ||
2339 | // if slave is null, the whole port is not initialized | |
2340 | if (!port->slave) { | |
4e0952c7 MW |
2341 | printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for " |
2342 | "uninitialized port on %s\n", | |
2343 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2344 | return; |
2345 | } | |
2346 | ||
2347 | // 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) | |
2348 | // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report | |
2349 | if (link == BOND_LINK_UP) { | |
2350 | port->is_enabled = 1; | |
2351 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
2352 | port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); | |
2353 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
2354 | port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
2355 | } else { | |
2356 | /* link has failed */ | |
2357 | port->is_enabled = 0; | |
2358 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
2359 | port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS); | |
2360 | } | |
2361 | //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); | |
2362 | // there is no need to reselect a new aggregator, just signal the | |
2363 | // state machines to reinitialize | |
2364 | port->sm_vars |= AD_PORT_BEGIN; | |
2365 | } | |
2366 | ||
ff59c456 | 2367 | /* |
031ae4de | 2368 | * set link state for bonding master: if we have an active |
ff59c456 JV |
2369 | * aggregator, we're up, if not, we're down. Presumes that we cannot |
2370 | * have an active aggregator if there are no slaves with link up. | |
2371 | * | |
031ae4de JV |
2372 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2373 | * | |
ff59c456 JV |
2374 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2375 | * change, nonzero if it does. | |
2376 | */ | |
2377 | int bond_3ad_set_carrier(struct bonding *bond) | |
2378 | { | |
031ae4de | 2379 | if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) { |
ff59c456 JV |
2380 | if (!netif_carrier_ok(bond->dev)) { |
2381 | netif_carrier_on(bond->dev); | |
2382 | return 1; | |
2383 | } | |
2384 | return 0; | |
2385 | } | |
2386 | ||
2387 | if (netif_carrier_ok(bond->dev)) { | |
2388 | netif_carrier_off(bond->dev); | |
2389 | return 1; | |
2390 | } | |
2391 | return 0; | |
2392 | } | |
2393 | ||
1da177e4 LT |
2394 | /** |
2395 | * bond_3ad_get_active_agg_info - get information of the active aggregator | |
2396 | * @bond: bonding struct to work on | |
2397 | * @ad_info: ad_info struct to fill with the bond's info | |
2398 | * | |
2399 | * Returns: 0 on success | |
2400 | * < 0 on error | |
2401 | */ | |
2402 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2403 | { | |
2404 | struct aggregator *aggregator = NULL; | |
2405 | struct port *port; | |
2406 | ||
2407 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2408 | if (port->aggregator && port->aggregator->is_active) { | |
2409 | aggregator = port->aggregator; | |
2410 | break; | |
2411 | } | |
2412 | } | |
2413 | ||
2414 | if (aggregator) { | |
2415 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2416 | ad_info->ports = aggregator->num_of_ports; | |
2417 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2418 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2419 | memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); | |
2420 | return 0; | |
2421 | } | |
2422 | ||
2423 | return -1; | |
2424 | } | |
2425 | ||
2426 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) | |
2427 | { | |
2428 | struct slave *slave, *start_at; | |
454d7c9b | 2429 | struct bonding *bond = netdev_priv(dev); |
1da177e4 LT |
2430 | int slave_agg_no; |
2431 | int slaves_in_agg; | |
2432 | int agg_id; | |
2433 | int i; | |
2434 | struct ad_info ad_info; | |
2435 | int res = 1; | |
2436 | ||
2437 | /* make sure that the slaves list will | |
2438 | * not change during tx | |
2439 | */ | |
2440 | read_lock(&bond->lock); | |
2441 | ||
2442 | if (!BOND_IS_OK(bond)) { | |
2443 | goto out; | |
2444 | } | |
2445 | ||
2446 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
4e0952c7 MW |
2447 | printk(KERN_DEBUG DRV_NAME ": %s: Error: " |
2448 | "bond_3ad_get_active_agg_info failed\n", dev->name); | |
1da177e4 LT |
2449 | goto out; |
2450 | } | |
2451 | ||
2452 | slaves_in_agg = ad_info.ports; | |
2453 | agg_id = ad_info.aggregator_id; | |
2454 | ||
2455 | if (slaves_in_agg == 0) { | |
2456 | /*the aggregator is empty*/ | |
4e0952c7 MW |
2457 | printk(KERN_DEBUG DRV_NAME ": %s: Error: active " |
2458 | "aggregator is empty\n", | |
2459 | dev->name); | |
1da177e4 LT |
2460 | goto out; |
2461 | } | |
2462 | ||
169a3e66 | 2463 | slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg); |
1da177e4 LT |
2464 | |
2465 | bond_for_each_slave(bond, slave, i) { | |
2466 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2467 | ||
2468 | if (agg && (agg->aggregator_identifier == agg_id)) { | |
2469 | slave_agg_no--; | |
2470 | if (slave_agg_no < 0) { | |
2471 | break; | |
2472 | } | |
2473 | } | |
2474 | } | |
2475 | ||
2476 | if (slave_agg_no >= 0) { | |
4e0952c7 MW |
2477 | printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on " |
2478 | "for aggregator ID %d\n", dev->name, agg_id); | |
1da177e4 LT |
2479 | goto out; |
2480 | } | |
2481 | ||
2482 | start_at = slave; | |
2483 | ||
2484 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
2485 | int slave_agg_id = 0; | |
2486 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2487 | ||
2488 | if (agg) { | |
2489 | slave_agg_id = agg->aggregator_identifier; | |
2490 | } | |
2491 | ||
2492 | if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { | |
2493 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
2494 | break; | |
2495 | } | |
2496 | } | |
2497 | ||
2498 | out: | |
2499 | if (res) { | |
2500 | /* no suitable interface, frame not sent */ | |
2501 | dev_kfree_skb(skb); | |
2502 | } | |
2503 | read_unlock(&bond->lock); | |
2504 | return 0; | |
2505 | } | |
2506 | ||
f2ccd8fa | 2507 | int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev) |
1da177e4 | 2508 | { |
454d7c9b | 2509 | struct bonding *bond = netdev_priv(dev); |
1da177e4 LT |
2510 | struct slave *slave = NULL; |
2511 | int ret = NET_RX_DROP; | |
2512 | ||
c346dca1 | 2513 | if (dev_net(dev) != &init_net) |
e730c155 EB |
2514 | goto out; |
2515 | ||
f2ccd8fa | 2516 | if (!(dev->flags & IFF_MASTER)) |
1da177e4 | 2517 | goto out; |
1da177e4 LT |
2518 | |
2519 | read_lock(&bond->lock); | |
454d7c9b WC |
2520 | slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev), |
2521 | orig_dev); | |
f2ccd8fa | 2522 | if (!slave) |
1da177e4 | 2523 | goto out_unlock; |
1da177e4 LT |
2524 | |
2525 | bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); | |
2526 | ||
2527 | ret = NET_RX_SUCCESS; | |
2528 | ||
2529 | out_unlock: | |
2530 | read_unlock(&bond->lock); | |
2531 | out: | |
2532 | dev_kfree_skb(skb); | |
2533 | ||
2534 | return ret; | |
2535 | } | |
2536 |