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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> | |
30 | #include <linux/if_bonding.h> | |
31 | #include <linux/pkt_sched.h> | |
e730c155 | 32 | #include <net/net_namespace.h> |
1da177e4 LT |
33 | #include "bonding.h" |
34 | #include "bond_3ad.h" | |
35 | ||
36 | // General definitions | |
37 | #define AD_SHORT_TIMEOUT 1 | |
38 | #define AD_LONG_TIMEOUT 0 | |
39 | #define AD_STANDBY 0x2 | |
40 | #define AD_MAX_TX_IN_SECOND 3 | |
41 | #define AD_COLLECTOR_MAX_DELAY 0 | |
42 | ||
43 | // Timer definitions(43.4.4 in the 802.3ad standard) | |
44 | #define AD_FAST_PERIODIC_TIME 1 | |
45 | #define AD_SLOW_PERIODIC_TIME 30 | |
46 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
47 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
48 | #define AD_CHURN_DETECTION_TIME 60 | |
49 | #define AD_AGGREGATE_WAIT_TIME 2 | |
50 | ||
51 | // Port state definitions(43.4.2.2 in the 802.3ad standard) | |
52 | #define AD_STATE_LACP_ACTIVITY 0x1 | |
53 | #define AD_STATE_LACP_TIMEOUT 0x2 | |
54 | #define AD_STATE_AGGREGATION 0x4 | |
55 | #define AD_STATE_SYNCHRONIZATION 0x8 | |
56 | #define AD_STATE_COLLECTING 0x10 | |
57 | #define AD_STATE_DISTRIBUTING 0x20 | |
58 | #define AD_STATE_DEFAULTED 0x40 | |
59 | #define AD_STATE_EXPIRED 0x80 | |
60 | ||
61 | // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) | |
62 | #define AD_PORT_BEGIN 0x1 | |
63 | #define AD_PORT_LACP_ENABLED 0x2 | |
64 | #define AD_PORT_ACTOR_CHURN 0x4 | |
65 | #define AD_PORT_PARTNER_CHURN 0x8 | |
66 | #define AD_PORT_READY 0x10 | |
67 | #define AD_PORT_READY_N 0x20 | |
68 | #define AD_PORT_MATCHED 0x40 | |
69 | #define AD_PORT_STANDBY 0x80 | |
70 | #define AD_PORT_SELECTED 0x100 | |
71 | #define AD_PORT_MOVED 0x200 | |
72 | ||
73 | // Port Key definitions | |
74 | // key is determined according to the link speed, duplex and | |
75 | // user key(which is yet not supported) | |
76 | // ------------------------------------------------------------ | |
77 | // Port key : | User key | Speed |Duplex| | |
78 | // ------------------------------------------------------------ | |
79 | // 16 6 1 0 | |
80 | #define AD_DUPLEX_KEY_BITS 0x1 | |
81 | #define AD_SPEED_KEY_BITS 0x3E | |
82 | #define AD_USER_KEY_BITS 0xFFC0 | |
83 | ||
84 | //dalloun | |
85 | #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 | |
86 | #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 | |
87 | #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 | |
88 | #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 | |
94dbffd5 | 89 | #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 |
1da177e4 LT |
90 | //endalloun |
91 | ||
92 | // compare MAC addresses | |
93 | #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) | |
94 | ||
95 | static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}}; | |
96 | static u16 ad_ticks_per_sec; | |
97 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
98 | ||
99 | // ================= 3AD api to bonding and kernel code ================== | |
100 | static u16 __get_link_speed(struct port *port); | |
101 | static u8 __get_duplex(struct port *port); | |
102 | static inline void __initialize_port_locks(struct port *port); | |
103 | //conversions | |
89cc76f9 | 104 | static void __htons_lacpdu(struct lacpdu *lacpdu); |
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); | |
130 | static int ad_marker_send(struct port *port, struct marker *marker); | |
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); | |
143 | static void ad_marker_info_received(struct marker *marker_info, struct port *port); | |
144 | static void ad_marker_response_received(struct marker *marker, struct port *port); | |
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 | ||
240 | /** | |
241 | * __disable_port - disable the port's slave | |
242 | * @port: the port we're looking at | |
243 | * | |
244 | */ | |
245 | static inline void __disable_port(struct port *port) | |
246 | { | |
247 | bond_set_slave_inactive_flags(port->slave); | |
248 | } | |
249 | ||
250 | /** | |
251 | * __enable_port - enable the port's slave, if it's up | |
252 | * @port: the port we're looking at | |
253 | * | |
254 | */ | |
255 | static inline void __enable_port(struct port *port) | |
256 | { | |
257 | struct slave *slave = port->slave; | |
258 | ||
259 | if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) { | |
260 | bond_set_slave_active_flags(slave); | |
261 | } | |
262 | } | |
263 | ||
264 | /** | |
265 | * __port_is_enabled - check if the port's slave is in active state | |
266 | * @port: the port we're looking at | |
267 | * | |
268 | */ | |
269 | static inline int __port_is_enabled(struct port *port) | |
270 | { | |
271 | return(port->slave->state == BOND_STATE_ACTIVE); | |
272 | } | |
273 | ||
274 | /** | |
275 | * __get_agg_selection_mode - get the aggregator selection mode | |
276 | * @port: the port we're looking at | |
277 | * | |
278 | * Get the aggregator selection mode. Can be %BANDWIDTH or %COUNT. | |
279 | */ | |
280 | static inline u32 __get_agg_selection_mode(struct port *port) | |
281 | { | |
282 | struct bonding *bond = __get_bond_by_port(port); | |
283 | ||
284 | if (bond == NULL) { | |
285 | return AD_BANDWIDTH; | |
286 | } | |
287 | ||
288 | return BOND_AD_INFO(bond).agg_select_mode; | |
289 | } | |
290 | ||
291 | /** | |
292 | * __check_agg_selection_timer - check if the selection timer has expired | |
293 | * @port: the port we're looking at | |
294 | * | |
295 | */ | |
296 | static inline int __check_agg_selection_timer(struct port *port) | |
297 | { | |
298 | struct bonding *bond = __get_bond_by_port(port); | |
299 | ||
300 | if (bond == NULL) { | |
301 | return 0; | |
302 | } | |
303 | ||
304 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
305 | } | |
306 | ||
307 | /** | |
308 | * __get_rx_machine_lock - lock the port's RX machine | |
309 | * @port: the port we're looking at | |
310 | * | |
311 | */ | |
312 | static inline void __get_rx_machine_lock(struct port *port) | |
313 | { | |
314 | spin_lock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); | |
315 | } | |
316 | ||
317 | /** | |
318 | * __release_rx_machine_lock - unlock the port's RX machine | |
319 | * @port: the port we're looking at | |
320 | * | |
321 | */ | |
322 | static inline void __release_rx_machine_lock(struct port *port) | |
323 | { | |
324 | spin_unlock(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); | |
325 | } | |
326 | ||
327 | /** | |
328 | * __get_link_speed - get a port's speed | |
329 | * @port: the port we're looking at | |
330 | * | |
331 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
332 | * 0, | |
333 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
334 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
335 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
336 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
337 | */ |
338 | static u16 __get_link_speed(struct port *port) | |
339 | { | |
340 | struct slave *slave = port->slave; | |
341 | u16 speed; | |
342 | ||
343 | /* this if covers only a special case: when the configuration starts with | |
344 | * link down, it sets the speed to 0. | |
345 | * This is done in spite of the fact that the e100 driver reports 0 to be | |
346 | * compatible with MVT in the future.*/ | |
347 | if (slave->link != BOND_LINK_UP) { | |
348 | speed=0; | |
349 | } else { | |
350 | switch (slave->speed) { | |
351 | case SPEED_10: | |
352 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
353 | break; | |
354 | ||
355 | case SPEED_100: | |
356 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
357 | break; | |
358 | ||
359 | case SPEED_1000: | |
360 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
361 | break; | |
362 | ||
94dbffd5 JV |
363 | case SPEED_10000: |
364 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
365 | break; | |
366 | ||
1da177e4 LT |
367 | default: |
368 | speed = 0; // unknown speed value from ethtool. shouldn't happen | |
369 | break; | |
370 | } | |
371 | } | |
372 | ||
373 | dprintk("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed); | |
374 | return speed; | |
375 | } | |
376 | ||
377 | /** | |
378 | * __get_duplex - get a port's duplex | |
379 | * @port: the port we're looking at | |
380 | * | |
381 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
382 | * 0x01 if in full duplex | |
383 | * 0x00 otherwise | |
384 | */ | |
385 | static u8 __get_duplex(struct port *port) | |
386 | { | |
387 | struct slave *slave = port->slave; | |
388 | ||
389 | u8 retval; | |
390 | ||
391 | // handling a special case: when the configuration starts with | |
392 | // link down, it sets the duplex to 0. | |
393 | if (slave->link != BOND_LINK_UP) { | |
394 | retval=0x0; | |
395 | } else { | |
396 | switch (slave->duplex) { | |
397 | case DUPLEX_FULL: | |
398 | retval=0x1; | |
399 | dprintk("Port %d Received status full duplex update from adapter\n", port->actor_port_number); | |
400 | break; | |
401 | case DUPLEX_HALF: | |
402 | default: | |
403 | retval=0x0; | |
404 | dprintk("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number); | |
405 | break; | |
406 | } | |
407 | } | |
408 | return retval; | |
409 | } | |
410 | ||
411 | /** | |
412 | * __initialize_port_locks - initialize a port's RX machine spinlock | |
413 | * @port: the port we're looking at | |
414 | * | |
415 | */ | |
416 | static inline void __initialize_port_locks(struct port *port) | |
417 | { | |
418 | // make sure it isn't called twice | |
419 | spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); | |
420 | } | |
421 | ||
422 | //conversions | |
423 | /** | |
89cc76f9 | 424 | * __htons_lacpdu - convert the contents of a LACPDU to network byte order |
1da177e4 LT |
425 | * @lacpdu: the speicifed lacpdu |
426 | * | |
427 | * For each multi-byte field in the lacpdu, convert its content | |
428 | */ | |
89cc76f9 | 429 | static void __htons_lacpdu(struct lacpdu *lacpdu) |
1da177e4 LT |
430 | { |
431 | if (lacpdu) { | |
89cc76f9 JV |
432 | lacpdu->actor_system_priority = htons(lacpdu->actor_system_priority); |
433 | lacpdu->actor_key = htons(lacpdu->actor_key); | |
434 | lacpdu->actor_port_priority = htons(lacpdu->actor_port_priority); | |
435 | lacpdu->actor_port = htons(lacpdu->actor_port); | |
436 | lacpdu->partner_system_priority = htons(lacpdu->partner_system_priority); | |
437 | lacpdu->partner_key = htons(lacpdu->partner_key); | |
438 | lacpdu->partner_port_priority = htons(lacpdu->partner_port_priority); | |
439 | lacpdu->partner_port = htons(lacpdu->partner_port); | |
440 | lacpdu->collector_max_delay = htons(lacpdu->collector_max_delay); | |
1da177e4 LT |
441 | } |
442 | } | |
443 | ||
444 | /** | |
445 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
446 | * @timer_type: which timer to operate | |
447 | * @par: timer parameter. see below | |
448 | * | |
449 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
450 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
451 | * %SLOW_PERIODIC_TIME. | |
452 | */ | |
453 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
454 | { | |
455 | u16 retval=0; //to silence the compiler | |
456 | ||
457 | switch (timer_type) { | |
458 | case AD_CURRENT_WHILE_TIMER: // for rx machine usage | |
459 | if (par) { // for short or long timeout | |
460 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout | |
461 | } else { | |
462 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout | |
463 | } | |
464 | break; | |
465 | case AD_ACTOR_CHURN_TIMER: // for local churn machine | |
466 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
467 | break; | |
468 | case AD_PERIODIC_TIMER: // for periodic machine | |
469 | retval = (par*ad_ticks_per_sec); // long timeout | |
470 | break; | |
471 | case AD_PARTNER_CHURN_TIMER: // for remote churn machine | |
472 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
473 | break; | |
474 | case AD_WAIT_WHILE_TIMER: // for selection machine | |
475 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
476 | break; | |
477 | } | |
478 | return retval; | |
479 | } | |
480 | ||
481 | ||
482 | ///////////////////////////////////////////////////////////////////////////////// | |
483 | // ================= ad_rx_machine helper functions ================== | |
484 | ///////////////////////////////////////////////////////////////////////////////// | |
485 | ||
486 | /** | |
487 | * __record_pdu - record parameters from a received lacpdu | |
488 | * @lacpdu: the lacpdu we've received | |
489 | * @port: the port we're looking at | |
490 | * | |
491 | * Record the parameter values for the Actor carried in a received lacpdu as | |
492 | * the current partner operational parameter values and sets | |
493 | * actor_oper_port_state.defaulted to FALSE. | |
494 | */ | |
495 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
496 | { | |
497 | // validate lacpdu and port | |
498 | if (lacpdu && port) { | |
499 | // record the new parameter values for the partner operational | |
89cc76f9 JV |
500 | port->partner_oper_port_number = ntohs(lacpdu->actor_port); |
501 | port->partner_oper_port_priority = ntohs(lacpdu->actor_port_priority); | |
1da177e4 | 502 | port->partner_oper_system = lacpdu->actor_system; |
89cc76f9 JV |
503 | port->partner_oper_system_priority = ntohs(lacpdu->actor_system_priority); |
504 | port->partner_oper_key = ntohs(lacpdu->actor_key); | |
1da177e4 LT |
505 | // zero partener's lase states |
506 | port->partner_oper_port_state = 0; | |
507 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_ACTIVITY); | |
508 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_LACP_TIMEOUT); | |
509 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_AGGREGATION); | |
510 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION); | |
511 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_COLLECTING); | |
512 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DISTRIBUTING); | |
513 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_DEFAULTED); | |
514 | port->partner_oper_port_state |= (lacpdu->actor_state & AD_STATE_EXPIRED); | |
515 | ||
516 | // set actor_oper_port_state.defaulted to FALSE | |
517 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; | |
518 | ||
519 | // set the partner sync. to on if the partner is sync. and the port is matched | |
520 | if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { | |
521 | port->partner_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
522 | } else { | |
523 | port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
524 | } | |
525 | } | |
526 | } | |
527 | ||
528 | /** | |
529 | * __record_default - record default parameters | |
530 | * @port: the port we're looking at | |
531 | * | |
532 | * This function records the default parameter values for the partner carried | |
533 | * in the Partner Admin parameters as the current partner operational parameter | |
534 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
535 | */ | |
536 | static void __record_default(struct port *port) | |
537 | { | |
538 | // validate the port | |
539 | if (port) { | |
540 | // record the partner admin parameters | |
541 | port->partner_oper_port_number = port->partner_admin_port_number; | |
542 | port->partner_oper_port_priority = port->partner_admin_port_priority; | |
543 | port->partner_oper_system = port->partner_admin_system; | |
544 | port->partner_oper_system_priority = port->partner_admin_system_priority; | |
545 | port->partner_oper_key = port->partner_admin_key; | |
546 | port->partner_oper_port_state = port->partner_admin_port_state; | |
547 | ||
548 | // set actor_oper_port_state.defaulted to true | |
549 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; | |
550 | } | |
551 | } | |
552 | ||
553 | /** | |
554 | * __update_selected - update a port's Selected variable from a received lacpdu | |
555 | * @lacpdu: the lacpdu we've received | |
556 | * @port: the port we're looking at | |
557 | * | |
558 | * Update the value of the selected variable, using parameter values from a | |
559 | * newly received lacpdu. The parameter values for the Actor carried in the | |
560 | * received PDU are compared with the corresponding operational parameter | |
561 | * values for the ports partner. If one or more of the comparisons shows that | |
562 | * the value(s) received in the PDU differ from the current operational values, | |
563 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
564 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
565 | */ | |
566 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
567 | { | |
568 | // validate lacpdu and port | |
569 | if (lacpdu && port) { | |
570 | // check if any parameter is different | |
89cc76f9 JV |
571 | if ((ntohs(lacpdu->actor_port) != port->partner_oper_port_number) || |
572 | (ntohs(lacpdu->actor_port_priority) != port->partner_oper_port_priority) || | |
1da177e4 | 573 | MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->partner_oper_system)) || |
89cc76f9 JV |
574 | (ntohs(lacpdu->actor_system_priority) != port->partner_oper_system_priority) || |
575 | (ntohs(lacpdu->actor_key) != port->partner_oper_key) || | |
1da177e4 LT |
576 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) |
577 | ) { | |
578 | // update the state machine Selected variable | |
579 | port->sm_vars &= ~AD_PORT_SELECTED; | |
580 | } | |
581 | } | |
582 | } | |
583 | ||
584 | /** | |
585 | * __update_default_selected - update a port's Selected variable from Partner | |
586 | * @port: the port we're looking at | |
587 | * | |
588 | * This function updates the value of the selected variable, using the partner | |
589 | * administrative parameter values. The administrative values are compared with | |
590 | * the corresponding operational parameter values for the partner. If one or | |
591 | * more of the comparisons shows that the administrative value(s) differ from | |
592 | * the current operational values, then Selected is set to FALSE and | |
593 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
594 | * Selected remains unchanged. | |
595 | */ | |
596 | static void __update_default_selected(struct port *port) | |
597 | { | |
598 | // validate the port | |
599 | if (port) { | |
600 | // check if any parameter is different | |
601 | if ((port->partner_admin_port_number != port->partner_oper_port_number) || | |
602 | (port->partner_admin_port_priority != port->partner_oper_port_priority) || | |
603 | MAC_ADDRESS_COMPARE(&(port->partner_admin_system), &(port->partner_oper_system)) || | |
604 | (port->partner_admin_system_priority != port->partner_oper_system_priority) || | |
605 | (port->partner_admin_key != port->partner_oper_key) || | |
606 | ((port->partner_admin_port_state & AD_STATE_AGGREGATION) != (port->partner_oper_port_state & AD_STATE_AGGREGATION)) | |
607 | ) { | |
608 | // update the state machine Selected variable | |
609 | port->sm_vars &= ~AD_PORT_SELECTED; | |
610 | } | |
611 | } | |
612 | } | |
613 | ||
614 | /** | |
615 | * __choose_matched - update a port's matched variable from a received lacpdu | |
616 | * @lacpdu: the lacpdu we've received | |
617 | * @port: the port we're looking at | |
618 | * | |
619 | * Update the value of the matched variable, using parameter values from a | |
620 | * newly received lacpdu. Parameter values for the partner carried in the | |
621 | * received PDU are compared with the corresponding operational parameter | |
622 | * values for the actor. Matched is set to TRUE if all of these parameters | |
623 | * match and the PDU parameter partner_state.aggregation has the same value as | |
624 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
625 | * in the aggregation. Matched is also set to TRUE if the value of | |
626 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
627 | * an individual link and lacp will actively maintain the link. Otherwise, | |
628 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
629 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
630 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
631 | * partner_state.lacp_activity variables are TRUE. | |
632 | */ | |
633 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
634 | { | |
635 | // validate lacpdu and port | |
636 | if (lacpdu && port) { | |
637 | // check if all parameters are alike | |
89cc76f9 JV |
638 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
639 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
1da177e4 | 640 | !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && |
89cc76f9 JV |
641 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
642 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
1da177e4 LT |
643 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || |
644 | // or this is individual link(aggregation == FALSE) | |
645 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) | |
646 | ) { | |
647 | // update the state machine Matched variable | |
648 | port->sm_vars |= AD_PORT_MATCHED; | |
649 | } else { | |
650 | port->sm_vars &= ~AD_PORT_MATCHED; | |
651 | } | |
652 | } | |
653 | } | |
654 | ||
655 | /** | |
656 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
657 | * @lacpdu: the lacpdu we've received | |
658 | * @port: the port we're looking at | |
659 | * | |
660 | * Updates the value of the ntt variable, using parameter values from a newly | |
661 | * received lacpdu. The parameter values for the partner carried in the | |
662 | * received PDU are compared with the corresponding operational parameter | |
663 | * values for the Actor. If one or more of the comparisons shows that the | |
664 | * value(s) received in the PDU differ from the current operational values, | |
665 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
666 | */ | |
667 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
668 | { | |
669 | // validate lacpdu and port | |
670 | if (lacpdu && port) { | |
671 | // check if any parameter is different | |
89cc76f9 JV |
672 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
673 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
1da177e4 | 674 | MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
675 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
676 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
677 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
678 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
679 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
680 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
681 | ) { | |
682 | // set ntt to be TRUE | |
683 | port->ntt = 1; | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
688 | /** | |
689 | * __attach_bond_to_agg | |
690 | * @port: the port we're looking at | |
691 | * | |
692 | * Handle the attaching of the port's control parser/multiplexer and the | |
693 | * aggregator. This function does nothing since the parser/multiplexer of the | |
694 | * receive and the parser/multiplexer of the aggregator are already combined. | |
695 | */ | |
696 | static void __attach_bond_to_agg(struct port *port) | |
697 | { | |
698 | port=NULL; // just to satisfy the compiler | |
699 | // This function does nothing since the parser/multiplexer of the receive | |
700 | // and the parser/multiplexer of the aggregator are already combined | |
701 | } | |
702 | ||
703 | /** | |
704 | * __detach_bond_from_agg | |
705 | * @port: the port we're looking at | |
706 | * | |
707 | * Handle the detaching of the port's control parser/multiplexer from the | |
708 | * aggregator. This function does nothing since the parser/multiplexer of the | |
709 | * receive and the parser/multiplexer of the aggregator are already combined. | |
710 | */ | |
711 | static void __detach_bond_from_agg(struct port *port) | |
712 | { | |
713 | port=NULL; // just to satisfy the compiler | |
714 | // This function does nothing sience the parser/multiplexer of the receive | |
715 | // and the parser/multiplexer of the aggregator are already combined | |
716 | } | |
717 | ||
718 | /** | |
719 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
720 | * @aggregator: the aggregator we're looking at | |
721 | * | |
722 | */ | |
723 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
724 | { | |
725 | struct port *port; | |
726 | int retval = 1; | |
727 | ||
728 | if (aggregator) { | |
729 | // scan all ports in this aggregator to verfy if they are all ready | |
730 | for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
731 | if (!(port->sm_vars & AD_PORT_READY_N)) { | |
732 | retval = 0; | |
733 | break; | |
734 | } | |
735 | } | |
736 | } | |
737 | ||
738 | return retval; | |
739 | } | |
740 | ||
741 | /** | |
742 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
743 | * @aggregator: the aggregator we're looking at | |
744 | * @val: Should the ports' ready bit be set on or off | |
745 | * | |
746 | */ | |
747 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
748 | { | |
749 | struct port *port; | |
750 | ||
751 | for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
752 | if (val) { | |
753 | port->sm_vars |= AD_PORT_READY; | |
754 | } else { | |
755 | port->sm_vars &= ~AD_PORT_READY; | |
756 | } | |
757 | } | |
758 | } | |
759 | ||
760 | /** | |
761 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
762 | * @aggregator: the aggregator we're looking at | |
763 | * | |
764 | */ | |
765 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
766 | { | |
767 | u32 bandwidth=0; | |
768 | u32 basic_speed; | |
769 | ||
770 | if (aggregator->num_of_ports) { | |
771 | basic_speed = __get_link_speed(aggregator->lag_ports); | |
772 | switch (basic_speed) { | |
773 | case AD_LINK_SPEED_BITMASK_1MBPS: | |
774 | bandwidth = aggregator->num_of_ports; | |
775 | break; | |
776 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
777 | bandwidth = aggregator->num_of_ports * 10; | |
778 | break; | |
779 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
780 | bandwidth = aggregator->num_of_ports * 100; | |
781 | break; | |
782 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
783 | bandwidth = aggregator->num_of_ports * 1000; | |
784 | break; | |
94dbffd5 JV |
785 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
786 | bandwidth = aggregator->num_of_ports * 10000; | |
787 | break; | |
1da177e4 LT |
788 | default: |
789 | bandwidth=0; // to silent the compilor .... | |
790 | } | |
791 | } | |
792 | return bandwidth; | |
793 | } | |
794 | ||
795 | /** | |
796 | * __get_active_agg - get the current active aggregator | |
797 | * @aggregator: the aggregator we're looking at | |
798 | * | |
799 | */ | |
800 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
801 | { | |
802 | struct aggregator *retval = NULL; | |
803 | ||
804 | for (; aggregator; aggregator = __get_next_agg(aggregator)) { | |
805 | if (aggregator->is_active) { | |
806 | retval = aggregator; | |
807 | break; | |
808 | } | |
809 | } | |
810 | ||
811 | return retval; | |
812 | } | |
813 | ||
814 | /** | |
815 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
816 | * @port: the port we're looking at | |
817 | * | |
818 | */ | |
819 | static inline void __update_lacpdu_from_port(struct port *port) | |
820 | { | |
821 | struct lacpdu *lacpdu = &port->lacpdu; | |
822 | ||
823 | /* update current actual Actor parameters */ | |
824 | /* lacpdu->subtype initialized | |
825 | * lacpdu->version_number initialized | |
826 | * lacpdu->tlv_type_actor_info initialized | |
827 | * lacpdu->actor_information_length initialized | |
828 | */ | |
829 | ||
830 | lacpdu->actor_system_priority = port->actor_system_priority; | |
831 | lacpdu->actor_system = port->actor_system; | |
832 | lacpdu->actor_key = port->actor_oper_port_key; | |
833 | lacpdu->actor_port_priority = port->actor_port_priority; | |
834 | lacpdu->actor_port = port->actor_port_number; | |
835 | lacpdu->actor_state = port->actor_oper_port_state; | |
836 | ||
837 | /* lacpdu->reserved_3_1 initialized | |
838 | * lacpdu->tlv_type_partner_info initialized | |
839 | * lacpdu->partner_information_length initialized | |
840 | */ | |
841 | ||
842 | lacpdu->partner_system_priority = port->partner_oper_system_priority; | |
843 | lacpdu->partner_system = port->partner_oper_system; | |
844 | lacpdu->partner_key = port->partner_oper_key; | |
845 | lacpdu->partner_port_priority = port->partner_oper_port_priority; | |
846 | lacpdu->partner_port = port->partner_oper_port_number; | |
847 | lacpdu->partner_state = port->partner_oper_port_state; | |
848 | ||
849 | /* lacpdu->reserved_3_2 initialized | |
850 | * lacpdu->tlv_type_collector_info initialized | |
851 | * lacpdu->collector_information_length initialized | |
852 | * collector_max_delay initialized | |
853 | * reserved_12[12] initialized | |
854 | * tlv_type_terminator initialized | |
855 | * terminator_length initialized | |
856 | * reserved_50[50] initialized | |
857 | */ | |
858 | ||
859 | /* Convert all non u8 parameters to Big Endian for transmit */ | |
89cc76f9 | 860 | __htons_lacpdu(lacpdu); |
1da177e4 LT |
861 | } |
862 | ||
863 | ////////////////////////////////////////////////////////////////////////////////////// | |
864 | // ================= main 802.3ad protocol code ====================================== | |
865 | ////////////////////////////////////////////////////////////////////////////////////// | |
866 | ||
867 | /** | |
868 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
869 | * @port: the port we're looking at | |
870 | * | |
871 | * Returns: 0 on success | |
872 | * < 0 on error | |
873 | */ | |
874 | static int ad_lacpdu_send(struct port *port) | |
875 | { | |
876 | struct slave *slave = port->slave; | |
877 | struct sk_buff *skb; | |
878 | struct lacpdu_header *lacpdu_header; | |
879 | int length = sizeof(struct lacpdu_header); | |
880 | struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; | |
881 | ||
882 | skb = dev_alloc_skb(length); | |
883 | if (!skb) { | |
884 | return -ENOMEM; | |
885 | } | |
886 | ||
887 | skb->dev = slave->dev; | |
459a98ed | 888 | skb_reset_mac_header(skb); |
b0e380b1 | 889 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
890 | skb->protocol = PKT_TYPE_LACPDU; |
891 | skb->priority = TC_PRIO_CONTROL; | |
892 | ||
893 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
894 | ||
895 | lacpdu_header->ad_header.destination_address = lacpdu_multicast_address; | |
896 | /* Note: source addres is set to be the member's PERMANENT address, because we use it | |
897 | to identify loopback lacpdus in receive. */ | |
898 | lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); | |
899 | lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU; | |
900 | ||
901 | lacpdu_header->lacpdu = port->lacpdu; // struct copy | |
902 | ||
903 | dev_queue_xmit(skb); | |
904 | ||
905 | return 0; | |
906 | } | |
907 | ||
908 | /** | |
909 | * ad_marker_send - send marker information/response on a given port | |
910 | * @port: the port we're looking at | |
911 | * @marker: marker data to send | |
912 | * | |
913 | * Returns: 0 on success | |
914 | * < 0 on error | |
915 | */ | |
916 | static int ad_marker_send(struct port *port, struct marker *marker) | |
917 | { | |
918 | struct slave *slave = port->slave; | |
919 | struct sk_buff *skb; | |
920 | struct marker_header *marker_header; | |
921 | int length = sizeof(struct marker_header); | |
922 | struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; | |
923 | ||
924 | skb = dev_alloc_skb(length + 16); | |
925 | if (!skb) { | |
926 | return -ENOMEM; | |
927 | } | |
928 | ||
929 | skb_reserve(skb, 16); | |
930 | ||
931 | skb->dev = slave->dev; | |
459a98ed | 932 | skb_reset_mac_header(skb); |
b0e380b1 | 933 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
934 | skb->protocol = PKT_TYPE_LACPDU; |
935 | ||
936 | marker_header = (struct marker_header *)skb_put(skb, length); | |
937 | ||
938 | marker_header->ad_header.destination_address = lacpdu_multicast_address; | |
939 | /* Note: source addres is set to be the member's PERMANENT address, because we use it | |
940 | to identify loopback MARKERs in receive. */ | |
941 | marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); | |
942 | marker_header->ad_header.length_type = PKT_TYPE_LACPDU; | |
943 | ||
944 | marker_header->marker = *marker; // struct copy | |
945 | ||
946 | dev_queue_xmit(skb); | |
947 | ||
948 | return 0; | |
949 | } | |
950 | ||
951 | /** | |
952 | * ad_mux_machine - handle a port's mux state machine | |
953 | * @port: the port we're looking at | |
954 | * | |
955 | */ | |
956 | static void ad_mux_machine(struct port *port) | |
957 | { | |
958 | mux_states_t last_state; | |
959 | ||
960 | // keep current State Machine state to compare later if it was changed | |
961 | last_state = port->sm_mux_state; | |
962 | ||
963 | if (port->sm_vars & AD_PORT_BEGIN) { | |
964 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
965 | } else { | |
966 | switch (port->sm_mux_state) { | |
967 | case AD_MUX_DETACHED: | |
968 | if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY | |
969 | port->sm_mux_state = AD_MUX_WAITING; // next state | |
970 | } | |
971 | break; | |
972 | case AD_MUX_WAITING: | |
973 | // if SELECTED == FALSE return to DETACH state | |
974 | if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED | |
975 | port->sm_vars &= ~AD_PORT_READY_N; | |
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 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
980 | break; | |
981 | } | |
982 | ||
983 | // check if the wait_while_timer expired | |
984 | if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) { | |
985 | port->sm_vars |= AD_PORT_READY_N; | |
986 | } | |
987 | ||
988 | // in order to withhold the selection logic to check all ports READY_N value | |
989 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
990 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
991 | ||
992 | // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state | |
993 | if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) { | |
994 | port->sm_mux_state = AD_MUX_ATTACHED; // next state | |
995 | } | |
996 | break; | |
997 | case AD_MUX_ATTACHED: | |
998 | // check also if agg_select_timer expired(so the edable port will take place only after this timer) | |
999 | if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { | |
1000 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state | |
1001 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY | |
1002 | port->sm_vars &= ~AD_PORT_READY_N; | |
1003 | // in order to withhold the selection logic to check all ports READY_N value | |
1004 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
1005 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1006 | port->sm_mux_state = AD_MUX_DETACHED;// next state | |
1007 | } | |
1008 | break; | |
1009 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1010 | if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || | |
1011 | !(port->partner_oper_port_state & AD_STATE_SYNCHRONIZATION) | |
1012 | ) { | |
1013 | port->sm_mux_state = AD_MUX_ATTACHED;// next state | |
1014 | ||
1015 | } else { | |
1016 | // if port state hasn't changed make | |
1017 | // sure that a collecting distributing | |
1018 | // port in an active aggregator is enabled | |
1019 | if (port->aggregator && | |
1020 | port->aggregator->is_active && | |
1021 | !__port_is_enabled(port)) { | |
1022 | ||
1023 | __enable_port(port); | |
1024 | } | |
1025 | } | |
1026 | break; | |
1027 | default: //to silence the compiler | |
1028 | break; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | // check if the state machine was changed | |
1033 | if (port->sm_mux_state != last_state) { | |
1034 | dprintk("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state); | |
1035 | switch (port->sm_mux_state) { | |
1036 | case AD_MUX_DETACHED: | |
1037 | __detach_bond_from_agg(port); | |
1038 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
1039 | ad_disable_collecting_distributing(port); | |
1040 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
1041 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
1042 | port->ntt = 1; | |
1043 | break; | |
1044 | case AD_MUX_WAITING: | |
1045 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
1046 | break; | |
1047 | case AD_MUX_ATTACHED: | |
1048 | __attach_bond_to_agg(port); | |
1049 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
1050 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
1051 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
1052 | ad_disable_collecting_distributing(port); | |
1053 | port->ntt = 1; | |
1054 | break; | |
1055 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1056 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
1057 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
1058 | ad_enable_collecting_distributing(port); | |
1059 | port->ntt = 1; | |
1060 | break; | |
1061 | default: //to silence the compiler | |
1062 | break; | |
1063 | } | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | /** | |
1068 | * ad_rx_machine - handle a port's rx State Machine | |
1069 | * @lacpdu: the lacpdu we've received | |
1070 | * @port: the port we're looking at | |
1071 | * | |
1072 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
1073 | * CURRENT. If timer expired set the state machine in the proper state. | |
1074 | * In other cases, this function checks if we need to switch to other state. | |
1075 | */ | |
1076 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
1077 | { | |
1078 | rx_states_t last_state; | |
1079 | ||
1080 | // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback) | |
1081 | __get_rx_machine_lock(port); | |
1082 | ||
1083 | // keep current State Machine state to compare later if it was changed | |
1084 | last_state = port->sm_rx_state; | |
1085 | ||
1086 | // check if state machine should change state | |
1087 | // first, check if port was reinitialized | |
1088 | if (port->sm_vars & AD_PORT_BEGIN) { | |
1089 | port->sm_rx_state = AD_RX_INITIALIZE; // next state | |
1090 | } | |
1091 | // check if port is not enabled | |
1092 | else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) { | |
1093 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1094 | } | |
1095 | // check if new lacpdu arrived | |
1096 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { | |
1097 | port->sm_rx_timer_counter = 0; // zero timer | |
1098 | port->sm_rx_state = AD_RX_CURRENT; | |
1099 | } else { | |
1100 | // if timer is on, and if it is expired | |
1101 | if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { | |
1102 | switch (port->sm_rx_state) { | |
1103 | case AD_RX_EXPIRED: | |
1104 | port->sm_rx_state = AD_RX_DEFAULTED; // next state | |
1105 | break; | |
1106 | case AD_RX_CURRENT: | |
1107 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1108 | break; | |
1109 | default: //to silence the compiler | |
1110 | break; | |
1111 | } | |
1112 | } else { | |
1113 | // if no lacpdu arrived and no timer is on | |
1114 | switch (port->sm_rx_state) { | |
1115 | case AD_RX_PORT_DISABLED: | |
1116 | if (port->sm_vars & AD_PORT_MOVED) { | |
1117 | port->sm_rx_state = AD_RX_INITIALIZE; // next state | |
1118 | } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1119 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1120 | } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) { | |
1121 | port->sm_rx_state = AD_RX_LACP_DISABLED; // next state | |
1122 | } | |
1123 | break; | |
1124 | default: //to silence the compiler | |
1125 | break; | |
1126 | ||
1127 | } | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | // check if the State machine was changed or new lacpdu arrived | |
1132 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
1133 | dprintk("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state); | |
1134 | switch (port->sm_rx_state) { | |
1135 | case AD_RX_INITIALIZE: | |
1136 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { | |
1137 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
1138 | } else { | |
1139 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
1140 | } | |
1141 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1142 | __record_default(port); | |
1143 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1144 | port->sm_vars &= ~AD_PORT_MOVED; | |
1145 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1146 | ||
1147 | /*- Fall Through -*/ | |
1148 | ||
1149 | case AD_RX_PORT_DISABLED: | |
1150 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1151 | break; | |
1152 | case AD_RX_LACP_DISABLED: | |
1153 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1154 | __record_default(port); | |
1155 | port->partner_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1156 | port->sm_vars |= AD_PORT_MATCHED; | |
1157 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1158 | break; | |
1159 | case AD_RX_EXPIRED: | |
1160 | //Reset of the Synchronization flag. (Standard 43.4.12) | |
1161 | //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the | |
1162 | //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. | |
1163 | port->partner_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
1164 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1165 | port->partner_oper_port_state |= AD_SHORT_TIMEOUT; | |
1166 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); | |
1167 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1168 | break; | |
1169 | case AD_RX_DEFAULTED: | |
1170 | __update_default_selected(port); | |
1171 | __record_default(port); | |
1172 | port->sm_vars |= AD_PORT_MATCHED; | |
1173 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1174 | break; | |
1175 | case AD_RX_CURRENT: | |
1176 | // detect loopback situation | |
1177 | if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { | |
1178 | // INFO_RECEIVED_LOOPBACK_FRAMES | |
4e0952c7 MW |
1179 | printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on " |
1180 | "adapter (%s). Check the configuration to verify that all " | |
1181 | "Adapters are connected to 802.3ad compliant switch ports\n", | |
1182 | port->slave->dev->master->name, port->slave->dev->name); | |
1da177e4 LT |
1183 | __release_rx_machine_lock(port); |
1184 | return; | |
1185 | } | |
1186 | __update_selected(lacpdu, port); | |
1187 | __update_ntt(lacpdu, port); | |
1188 | __record_pdu(lacpdu, port); | |
1189 | __choose_matched(lacpdu, port); | |
1190 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); | |
1191 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1192 | // verify that if the aggregator is enabled, the port is enabled too. | |
1193 | //(because if the link goes down for a short time, the 802.3ad will not | |
1194 | // catch it, and the port will continue to be disabled) | |
1195 | if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) { | |
1196 | __enable_port(port); | |
1197 | } | |
1198 | break; | |
1199 | default: //to silence the compiler | |
1200 | break; | |
1201 | } | |
1202 | } | |
1203 | __release_rx_machine_lock(port); | |
1204 | } | |
1205 | ||
1206 | /** | |
1207 | * ad_tx_machine - handle a port's tx state machine | |
1208 | * @port: the port we're looking at | |
1209 | * | |
1210 | */ | |
1211 | static void ad_tx_machine(struct port *port) | |
1212 | { | |
1213 | // check if tx timer expired, to verify that we do not send more than 3 packets per second | |
1214 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1215 | // check if there is something to send | |
1216 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1217 | __update_lacpdu_from_port(port); | |
1218 | // send the lacpdu | |
1219 | if (ad_lacpdu_send(port) >= 0) { | |
1220 | dprintk("Sent LACPDU on port %d\n", port->actor_port_number); | |
1221 | // mark ntt as false, so it will not be sent again until demanded | |
1222 | port->ntt = 0; | |
1223 | } | |
1224 | } | |
1225 | // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND | |
1226 | port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | /** | |
1231 | * ad_periodic_machine - handle a port's periodic state machine | |
1232 | * @port: the port we're looking at | |
1233 | * | |
1234 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1235 | */ | |
1236 | static void ad_periodic_machine(struct port *port) | |
1237 | { | |
1238 | periodic_states_t last_state; | |
1239 | ||
1240 | // keep current state machine state to compare later if it was changed | |
1241 | last_state = port->sm_periodic_state; | |
1242 | ||
1243 | // check if port was reinitialized | |
1244 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || | |
1245 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper_port_state & AD_STATE_LACP_ACTIVITY)) | |
1246 | ) { | |
1247 | port->sm_periodic_state = AD_NO_PERIODIC; // next state | |
1248 | } | |
1249 | // check if state machine should change state | |
1250 | else if (port->sm_periodic_timer_counter) { | |
1251 | // check if periodic state machine expired | |
1252 | if (!(--port->sm_periodic_timer_counter)) { | |
1253 | // if expired then do tx | |
1254 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1255 | } else { | |
1256 | // If not expired, check if there is some new timeout parameter from the partner state | |
1257 | switch (port->sm_periodic_state) { | |
1258 | case AD_FAST_PERIODIC: | |
1259 | if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { | |
1260 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state | |
1261 | } | |
1262 | break; | |
1263 | case AD_SLOW_PERIODIC: | |
1264 | if ((port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { | |
1265 | // stop current timer | |
1266 | port->sm_periodic_timer_counter = 0; | |
1267 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1268 | } | |
1269 | break; | |
1270 | default: //to silence the compiler | |
1271 | break; | |
1272 | } | |
1273 | } | |
1274 | } else { | |
1275 | switch (port->sm_periodic_state) { | |
1276 | case AD_NO_PERIODIC: | |
1277 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1278 | break; | |
1279 | case AD_PERIODIC_TX: | |
1280 | if (!(port->partner_oper_port_state & AD_STATE_LACP_TIMEOUT)) { | |
1281 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state | |
1282 | } else { | |
1283 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1284 | } | |
1285 | break; | |
1286 | default: //to silence the compiler | |
1287 | break; | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | // check if the state machine was changed | |
1292 | if (port->sm_periodic_state != last_state) { | |
1293 | dprintk("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state); | |
1294 | switch (port->sm_periodic_state) { | |
1295 | case AD_NO_PERIODIC: | |
1296 | port->sm_periodic_timer_counter = 0; // zero timer | |
1297 | break; | |
1298 | case AD_FAST_PERIODIC: | |
1299 | 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 | |
1300 | break; | |
1301 | case AD_SLOW_PERIODIC: | |
1302 | 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 | |
1303 | break; | |
1304 | case AD_PERIODIC_TX: | |
1305 | port->ntt = 1; | |
1306 | break; | |
1307 | default: //to silence the compiler | |
1308 | break; | |
1309 | } | |
1310 | } | |
1311 | } | |
1312 | ||
1313 | /** | |
1314 | * ad_port_selection_logic - select aggregation groups | |
1315 | * @port: the port we're looking at | |
1316 | * | |
1317 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1318 | * selection logic is called in the inititalization (after all the handshkes), | |
1319 | * and after every lacpdu receive (if selected is off). | |
1320 | */ | |
1321 | static void ad_port_selection_logic(struct port *port) | |
1322 | { | |
1323 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1324 | struct port *last_port = NULL, *curr_port; | |
1325 | int found = 0; | |
1326 | ||
1327 | // if the port is already Selected, do nothing | |
1328 | if (port->sm_vars & AD_PORT_SELECTED) { | |
1329 | return; | |
1330 | } | |
1331 | ||
1332 | // if the port is connected to other aggregator, detach it | |
1333 | if (port->aggregator) { | |
1334 | // detach the port from its former aggregator | |
1335 | temp_aggregator=port->aggregator; | |
1336 | for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) { | |
1337 | if (curr_port == port) { | |
1338 | temp_aggregator->num_of_ports--; | |
1339 | if (!last_port) {// if it is the first port attached to the aggregator | |
1340 | temp_aggregator->lag_ports=port->next_port_in_aggregator; | |
1341 | } else {// not the first port attached to the aggregator | |
1342 | last_port->next_port_in_aggregator=port->next_port_in_aggregator; | |
1343 | } | |
1344 | ||
1345 | // clear the port's relations to this aggregator | |
1346 | port->aggregator = NULL; | |
1347 | port->next_port_in_aggregator=NULL; | |
1348 | port->actor_port_aggregator_identifier=0; | |
1349 | ||
1350 | dprintk("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier); | |
1351 | // if the aggregator is empty, clear its parameters, and set it ready to be attached | |
1352 | if (!temp_aggregator->lag_ports) { | |
1353 | ad_clear_agg(temp_aggregator); | |
1354 | } | |
1355 | break; | |
1356 | } | |
1357 | } | |
1358 | if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list | |
4e0952c7 | 1359 | printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was " |
1da177e4 | 1360 | "related to aggregator %d but was not on its port list\n", |
4e0952c7 | 1361 | port->slave->dev->master->name, |
1da177e4 LT |
1362 | port->actor_port_number, port->slave->dev->name, |
1363 | port->aggregator->aggregator_identifier); | |
1364 | } | |
1365 | } | |
1366 | // search on all aggregators for a suitable aggregator for this port | |
1367 | for (aggregator = __get_first_agg(port); aggregator; | |
1368 | aggregator = __get_next_agg(aggregator)) { | |
1369 | ||
1370 | // keep a free aggregator for later use(if needed) | |
1371 | if (!aggregator->lag_ports) { | |
1372 | if (!free_aggregator) { | |
1373 | free_aggregator=aggregator; | |
1374 | } | |
1375 | continue; | |
1376 | } | |
1377 | // check if current aggregator suits us | |
1378 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND | |
1379 | !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper_system)) && | |
1380 | (aggregator->partner_system_priority == port->partner_oper_system_priority) && | |
1381 | (aggregator->partner_oper_aggregator_key == port->partner_oper_key) | |
1382 | ) && | |
1383 | ((MAC_ADDRESS_COMPARE(&(port->partner_oper_system), &(null_mac_addr)) && // partner answers | |
1384 | !aggregator->is_individual) // but is not individual OR | |
1385 | ) | |
1386 | ) { | |
1387 | // attach to the founded aggregator | |
1388 | port->aggregator = aggregator; | |
1389 | port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; | |
1390 | port->next_port_in_aggregator=aggregator->lag_ports; | |
1391 | port->aggregator->num_of_ports++; | |
1392 | aggregator->lag_ports=port; | |
1393 | dprintk("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1394 | ||
1395 | // mark this port as selected | |
1396 | port->sm_vars |= AD_PORT_SELECTED; | |
1397 | found = 1; | |
1398 | break; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | // the port couldn't find an aggregator - attach it to a new aggregator | |
1403 | if (!found) { | |
1404 | if (free_aggregator) { | |
1405 | // assign port a new aggregator | |
1406 | port->aggregator = free_aggregator; | |
1407 | port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; | |
1408 | ||
1409 | // update the new aggregator's parameters | |
1410 | // if port was responsed from the end-user | |
1411 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex | |
1412 | port->aggregator->is_individual = 0; | |
1413 | } else { | |
1414 | port->aggregator->is_individual = 1; | |
1415 | } | |
1416 | ||
1417 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1418 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
1419 | port->aggregator->partner_system=port->partner_oper_system; | |
1420 | port->aggregator->partner_system_priority = port->partner_oper_system_priority; | |
1421 | port->aggregator->partner_oper_aggregator_key = port->partner_oper_key; | |
1422 | port->aggregator->receive_state = 1; | |
1423 | port->aggregator->transmit_state = 1; | |
1424 | port->aggregator->lag_ports = port; | |
1425 | port->aggregator->num_of_ports++; | |
1426 | ||
1427 | // mark this port as selected | |
1428 | port->sm_vars |= AD_PORT_SELECTED; | |
1429 | ||
1430 | dprintk("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1431 | } else { | |
4e0952c7 MW |
1432 | printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n", |
1433 | port->slave->dev->master->name, | |
1da177e4 LT |
1434 | port->actor_port_number, port->slave->dev->name); |
1435 | } | |
1436 | } | |
1437 | // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports | |
1438 | // else set ready=FALSE in all aggregator's ports | |
1439 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1440 | ||
1441 | if (!__check_agg_selection_timer(port) && (aggregator = __get_first_agg(port))) { | |
1442 | ad_agg_selection_logic(aggregator); | |
1443 | } | |
1444 | } | |
1445 | ||
1446 | /** | |
1447 | * ad_agg_selection_logic - select an aggregation group for a team | |
1448 | * @aggregator: the aggregator we're looking at | |
1449 | * | |
1450 | * It is assumed that only one aggregator may be selected for a team. | |
1451 | * The logic of this function is to select (at first time) the aggregator with | |
1452 | * the most ports attached to it, and to reselect the active aggregator only if | |
1453 | * the previous aggregator has no more ports related to it. | |
1454 | * | |
1455 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1456 | * __get_active_agg() won't work correctly. This function should be better | |
1457 | * called with the bond itself, and retrieve the first agg from it. | |
1458 | */ | |
1459 | static void ad_agg_selection_logic(struct aggregator *aggregator) | |
1460 | { | |
1461 | struct aggregator *best_aggregator = NULL, *active_aggregator = NULL; | |
1462 | struct aggregator *last_active_aggregator = NULL, *origin_aggregator; | |
1463 | struct port *port; | |
1464 | u16 num_of_aggs=0; | |
1465 | ||
1466 | origin_aggregator = aggregator; | |
1467 | ||
1468 | //get current active aggregator | |
1469 | last_active_aggregator = __get_active_agg(aggregator); | |
1470 | ||
1471 | // search for the aggregator with the most ports attached to it. | |
1472 | do { | |
1473 | // count how many candidate lag's we have | |
1474 | if (aggregator->lag_ports) { | |
1475 | num_of_aggs++; | |
1476 | } | |
1477 | if (aggregator->is_active && !aggregator->is_individual && // if current aggregator is the active aggregator | |
1478 | MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr))) { // and partner answers to 802.3ad PDUs | |
1479 | if (aggregator->num_of_ports) { // if any ports attached to the current aggregator | |
1480 | best_aggregator=NULL; // disregard the best aggregator that was chosen by now | |
1481 | break; // stop the selection of other aggregator if there are any ports attached to this active aggregator | |
1482 | } else { // no ports attached to this active aggregator | |
1483 | aggregator->is_active = 0; // mark this aggregator as not active anymore | |
1484 | } | |
1485 | } | |
1486 | if (aggregator->num_of_ports) { // if any ports attached | |
1487 | if (best_aggregator) { // if there is a candidte aggregator | |
1488 | //The reasons for choosing new best aggregator: | |
1489 | // 1. if current agg is NOT individual and the best agg chosen so far is individual OR | |
1490 | // current and best aggs are both individual or both not individual, AND | |
1491 | // 2a. current agg partner reply but best agg partner do not reply OR | |
1492 | // 2b. current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply AND | |
1493 | // current has more ports/bandwidth, or same amount of ports but current has faster ports, THEN | |
1494 | // current agg become best agg so far | |
1495 | ||
1496 | //if current agg is NOT individual and the best agg chosen so far is individual change best_aggregator | |
1497 | if (!aggregator->is_individual && best_aggregator->is_individual) { | |
1498 | best_aggregator=aggregator; | |
1499 | } | |
1500 | // current and best aggs are both individual or both not individual | |
1501 | else if ((aggregator->is_individual && best_aggregator->is_individual) || | |
1502 | (!aggregator->is_individual && !best_aggregator->is_individual)) { | |
1503 | // current and best aggs are both individual or both not individual AND | |
1504 | // current agg partner reply but best agg partner do not reply | |
1505 | if ((MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) && | |
1506 | !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) { | |
1507 | best_aggregator=aggregator; | |
1508 | } | |
1509 | // current agg partner reply OR current agg partner do not reply AND best agg partner also do not reply | |
1510 | else if (! (!MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(null_mac_addr)) && | |
1511 | MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) { | |
1512 | if ((__get_agg_selection_mode(aggregator->lag_ports) == AD_BANDWIDTH)&& | |
1513 | (__get_agg_bandwidth(aggregator) > __get_agg_bandwidth(best_aggregator))) { | |
1514 | best_aggregator=aggregator; | |
1515 | } else if (__get_agg_selection_mode(aggregator->lag_ports) == AD_COUNT) { | |
1516 | if (((aggregator->num_of_ports > best_aggregator->num_of_ports) && | |
1517 | (aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS))|| | |
1518 | ((aggregator->num_of_ports == best_aggregator->num_of_ports) && | |
1519 | ((u16)(aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS) > | |
1520 | (u16)(best_aggregator->actor_oper_aggregator_key & AD_SPEED_KEY_BITS)))) { | |
1521 | best_aggregator=aggregator; | |
1522 | } | |
1523 | } | |
1524 | } | |
1525 | } | |
1526 | } else { | |
1527 | best_aggregator=aggregator; | |
1528 | } | |
1529 | } | |
1530 | aggregator->is_active = 0; // mark all aggregators as not active anymore | |
1531 | } while ((aggregator = __get_next_agg(aggregator))); | |
1532 | ||
1533 | // if we have new aggregator selected, don't replace the old aggregator if it has an answering partner, | |
1534 | // or if both old aggregator and new aggregator don't have answering partner | |
1535 | if (best_aggregator) { | |
1536 | if (last_active_aggregator && last_active_aggregator->lag_ports && last_active_aggregator->lag_ports->is_enabled && | |
1537 | (MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) || // partner answers OR | |
1538 | (!MAC_ADDRESS_COMPARE(&(last_active_aggregator->partner_system), &(null_mac_addr)) && // both old and new | |
1539 | !MAC_ADDRESS_COMPARE(&(best_aggregator->partner_system), &(null_mac_addr)))) // partner do not answer | |
1540 | ) { | |
1541 | // if new aggregator has link, and old aggregator does not, replace old aggregator.(do nothing) | |
1542 | // -> don't replace otherwise. | |
1543 | if (!(!last_active_aggregator->actor_oper_aggregator_key && best_aggregator->actor_oper_aggregator_key)) { | |
1544 | best_aggregator=NULL; | |
1545 | last_active_aggregator->is_active = 1; // don't replace good old aggregator | |
1546 | ||
1547 | } | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | // if there is new best aggregator, activate it | |
1552 | if (best_aggregator) { | |
1553 | for (aggregator = __get_first_agg(best_aggregator->lag_ports); | |
1554 | aggregator; | |
1555 | aggregator = __get_next_agg(aggregator)) { | |
1556 | ||
1557 | dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", | |
1558 | aggregator->aggregator_identifier, aggregator->num_of_ports, | |
1559 | aggregator->actor_oper_aggregator_key, aggregator->partner_oper_aggregator_key, | |
1560 | aggregator->is_individual, aggregator->is_active); | |
1561 | } | |
1562 | ||
1563 | // check if any partner replys | |
1564 | if (best_aggregator->is_individual) { | |
4e0952c7 MW |
1565 | printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad response from " |
1566 | "the link partner for any adapters in the bond\n", | |
1567 | best_aggregator->slave->dev->master->name); | |
1da177e4 LT |
1568 | } |
1569 | ||
1570 | // check if there are more than one aggregator | |
1571 | if (num_of_aggs > 1) { | |
1572 | dprintk("Warning: More than one Link Aggregation Group was " | |
1573 | "found in the bond. Only one group will function in the bond\n"); | |
1574 | } | |
1575 | ||
1576 | best_aggregator->is_active = 1; | |
1577 | dprintk("LAG %d choosed as the active LAG\n", best_aggregator->aggregator_identifier); | |
1578 | dprintk("Agg=%d; Ports=%d; a key=%d; p key=%d; Indiv=%d; Active=%d\n", | |
1579 | best_aggregator->aggregator_identifier, best_aggregator->num_of_ports, | |
1580 | best_aggregator->actor_oper_aggregator_key, best_aggregator->partner_oper_aggregator_key, | |
1581 | best_aggregator->is_individual, best_aggregator->is_active); | |
1582 | ||
1583 | // disable the ports that were related to the former active_aggregator | |
1584 | if (last_active_aggregator) { | |
1585 | for (port=last_active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
1586 | __disable_port(port); | |
1587 | } | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | // if the selected aggregator is of join individuals(partner_system is NULL), enable their ports | |
1592 | active_aggregator = __get_active_agg(origin_aggregator); | |
1593 | ||
1594 | if (active_aggregator) { | |
1595 | if (!MAC_ADDRESS_COMPARE(&(active_aggregator->partner_system), &(null_mac_addr))) { | |
1596 | for (port=active_aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
1597 | __enable_port(port); | |
1598 | } | |
1599 | } | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | /** | |
1604 | * ad_clear_agg - clear a given aggregator's parameters | |
1605 | * @aggregator: the aggregator we're looking at | |
1606 | * | |
1607 | */ | |
1608 | static void ad_clear_agg(struct aggregator *aggregator) | |
1609 | { | |
1610 | if (aggregator) { | |
1611 | aggregator->is_individual = 0; | |
1612 | aggregator->actor_admin_aggregator_key = 0; | |
1613 | aggregator->actor_oper_aggregator_key = 0; | |
1614 | aggregator->partner_system = null_mac_addr; | |
1615 | aggregator->partner_system_priority = 0; | |
1616 | aggregator->partner_oper_aggregator_key = 0; | |
1617 | aggregator->receive_state = 0; | |
1618 | aggregator->transmit_state = 0; | |
1619 | aggregator->lag_ports = NULL; | |
1620 | aggregator->is_active = 0; | |
1621 | aggregator->num_of_ports = 0; | |
1622 | dprintk("LAG %d was cleared\n", aggregator->aggregator_identifier); | |
1623 | } | |
1624 | } | |
1625 | ||
1626 | /** | |
1627 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1628 | * @aggregator: the aggregator we're looking at | |
1629 | * | |
1630 | */ | |
1631 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1632 | { | |
1633 | if (aggregator) { | |
1634 | ad_clear_agg(aggregator); | |
1635 | ||
1636 | aggregator->aggregator_mac_address = null_mac_addr; | |
1637 | aggregator->aggregator_identifier = 0; | |
1638 | aggregator->slave = NULL; | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | /** | |
1643 | * ad_initialize_port - initialize a given port's parameters | |
1644 | * @aggregator: the aggregator we're looking at | |
1645 | * @lacp_fast: boolean. whether fast periodic should be used | |
1646 | * | |
1647 | */ | |
1648 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1649 | { | |
1650 | if (port) { | |
1651 | port->actor_port_number = 1; | |
1652 | port->actor_port_priority = 0xff; | |
1653 | port->actor_system = null_mac_addr; | |
1654 | port->actor_system_priority = 0xffff; | |
1655 | port->actor_port_aggregator_identifier = 0; | |
1656 | port->ntt = 0; | |
1657 | port->actor_admin_port_key = 1; | |
1658 | port->actor_oper_port_key = 1; | |
1659 | port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1660 | port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1661 | ||
1662 | if (lacp_fast) { | |
1663 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
1664 | } | |
1665 | ||
1666 | port->partner_admin_system = null_mac_addr; | |
1667 | port->partner_oper_system = null_mac_addr; | |
1668 | port->partner_admin_system_priority = 0xffff; | |
1669 | port->partner_oper_system_priority = 0xffff; | |
1670 | port->partner_admin_key = 1; | |
1671 | port->partner_oper_key = 1; | |
1672 | port->partner_admin_port_number = 1; | |
1673 | port->partner_oper_port_number = 1; | |
1674 | port->partner_admin_port_priority = 0xff; | |
1675 | port->partner_oper_port_priority = 0xff; | |
1676 | port->partner_admin_port_state = 1; | |
1677 | port->partner_oper_port_state = 1; | |
1678 | port->is_enabled = 1; | |
1679 | // ****** private parameters ****** | |
1680 | port->sm_vars = 0x3; | |
1681 | port->sm_rx_state = 0; | |
1682 | port->sm_rx_timer_counter = 0; | |
1683 | port->sm_periodic_state = 0; | |
1684 | port->sm_periodic_timer_counter = 0; | |
1685 | port->sm_mux_state = 0; | |
1686 | port->sm_mux_timer_counter = 0; | |
1687 | port->sm_tx_state = 0; | |
1688 | port->sm_tx_timer_counter = 0; | |
1689 | port->slave = NULL; | |
1690 | port->aggregator = NULL; | |
1691 | port->next_port_in_aggregator = NULL; | |
1692 | port->transaction_id = 0; | |
1693 | ||
1694 | ad_initialize_lacpdu(&(port->lacpdu)); | |
1695 | } | |
1696 | } | |
1697 | ||
1698 | /** | |
1699 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1700 | * @port: the port we're looking at | |
1701 | * | |
1702 | * Enable @port if it's in an active aggregator | |
1703 | */ | |
1704 | static void ad_enable_collecting_distributing(struct port *port) | |
1705 | { | |
1706 | if (port->aggregator->is_active) { | |
1707 | dprintk("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1708 | __enable_port(port); | |
1709 | } | |
1710 | } | |
1711 | ||
1712 | /** | |
1713 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1714 | * @port: the port we're looking at | |
1715 | * | |
1716 | */ | |
1717 | static void ad_disable_collecting_distributing(struct port *port) | |
1718 | { | |
1719 | if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { | |
1720 | dprintk("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); | |
1721 | __disable_port(port); | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | #if 0 | |
1726 | /** | |
1727 | * ad_marker_info_send - send a marker information frame | |
1728 | * @port: the port we're looking at | |
1729 | * | |
1730 | * This function does nothing since we decided not to implement send and handle | |
1731 | * response for marker PDU's, in this stage, but only to respond to marker | |
1732 | * information. | |
1733 | */ | |
1734 | static void ad_marker_info_send(struct port *port) | |
1735 | { | |
1736 | struct marker marker; | |
1737 | u16 index; | |
1738 | ||
1739 | // fill the marker PDU with the appropriate values | |
1740 | marker.subtype = 0x02; | |
1741 | marker.version_number = 0x01; | |
1742 | marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; | |
1743 | marker.marker_length = 0x16; | |
1744 | // convert requester_port to Big Endian | |
1745 | marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); | |
1746 | marker.requester_system = port->actor_system; | |
1747 | // convert requester_port(u32) to Big Endian | |
1748 | marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24)); | |
1749 | marker.pad = 0; | |
1750 | marker.tlv_type_terminator = 0x00; | |
1751 | marker.terminator_length = 0x00; | |
1752 | for (index=0; index<90; index++) { | |
1753 | marker.reserved_90[index]=0; | |
1754 | } | |
1755 | ||
1756 | // send the marker information | |
1757 | if (ad_marker_send(port, &marker) >= 0) { | |
1758 | dprintk("Sent Marker Information on port %d\n", port->actor_port_number); | |
1759 | } | |
1760 | } | |
1761 | #endif | |
1762 | ||
1763 | /** | |
1764 | * ad_marker_info_received - handle receive of a Marker information frame | |
1765 | * @marker_info: Marker info received | |
1766 | * @port: the port we're looking at | |
1767 | * | |
1768 | */ | |
1769 | static void ad_marker_info_received(struct marker *marker_info,struct port *port) | |
1770 | { | |
1771 | struct marker marker; | |
1772 | ||
1773 | // copy the received marker data to the response marker | |
1774 | //marker = *marker_info; | |
1775 | memcpy(&marker, marker_info, sizeof(struct marker)); | |
1776 | // change the marker subtype to marker response | |
1777 | marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE; | |
1778 | // send the marker response | |
1779 | ||
1780 | if (ad_marker_send(port, &marker) >= 0) { | |
1781 | dprintk("Sent Marker Response on port %d\n", port->actor_port_number); | |
1782 | } | |
1783 | } | |
1784 | ||
1785 | /** | |
1786 | * ad_marker_response_received - handle receive of a marker response frame | |
1787 | * @marker: marker PDU received | |
1788 | * @port: the port we're looking at | |
1789 | * | |
1790 | * This function does nothing since we decided not to implement send and handle | |
1791 | * response for marker PDU's, in this stage, but only to respond to marker | |
1792 | * information. | |
1793 | */ | |
1794 | static void ad_marker_response_received(struct marker *marker, struct port *port) | |
1795 | { | |
1796 | marker=NULL; // just to satisfy the compiler | |
1797 | port=NULL; // just to satisfy the compiler | |
1798 | // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW | |
1799 | } | |
1800 | ||
1801 | /** | |
1802 | * ad_initialize_lacpdu - initialize a given lacpdu structure | |
1803 | * @lacpdu: lacpdu structure to initialize | |
1804 | * | |
1805 | */ | |
1806 | static void ad_initialize_lacpdu(struct lacpdu *lacpdu) | |
1807 | { | |
1808 | u16 index; | |
1809 | ||
1810 | // initialize lacpdu data | |
1811 | lacpdu->subtype = 0x01; | |
1812 | lacpdu->version_number = 0x01; | |
1813 | lacpdu->tlv_type_actor_info = 0x01; | |
1814 | lacpdu->actor_information_length = 0x14; | |
1815 | // lacpdu->actor_system_priority updated on send | |
1816 | // lacpdu->actor_system updated on send | |
1817 | // lacpdu->actor_key updated on send | |
1818 | // lacpdu->actor_port_priority updated on send | |
1819 | // lacpdu->actor_port updated on send | |
1820 | // lacpdu->actor_state updated on send | |
1821 | lacpdu->tlv_type_partner_info = 0x02; | |
1822 | lacpdu->partner_information_length = 0x14; | |
1823 | for (index=0; index<=2; index++) { | |
1824 | lacpdu->reserved_3_1[index]=0; | |
1825 | } | |
1826 | // lacpdu->partner_system_priority updated on send | |
1827 | // lacpdu->partner_system updated on send | |
1828 | // lacpdu->partner_key updated on send | |
1829 | // lacpdu->partner_port_priority updated on send | |
1830 | // lacpdu->partner_port updated on send | |
1831 | // lacpdu->partner_state updated on send | |
1832 | for (index=0; index<=2; index++) { | |
1833 | lacpdu->reserved_3_2[index]=0; | |
1834 | } | |
1835 | lacpdu->tlv_type_collector_info = 0x03; | |
1836 | lacpdu->collector_information_length= 0x10; | |
1837 | lacpdu->collector_max_delay = AD_COLLECTOR_MAX_DELAY; | |
1838 | for (index=0; index<=11; index++) { | |
1839 | lacpdu->reserved_12[index]=0; | |
1840 | } | |
1841 | lacpdu->tlv_type_terminator = 0x00; | |
1842 | lacpdu->terminator_length = 0; | |
1843 | for (index=0; index<=49; index++) { | |
1844 | lacpdu->reserved_50[index]=0; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | ////////////////////////////////////////////////////////////////////////////////////// | |
1849 | // ================= AD exported functions to the main bonding code ================== | |
1850 | ////////////////////////////////////////////////////////////////////////////////////// | |
1851 | ||
1852 | // Check aggregators status in team every T seconds | |
1853 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1854 | ||
1855 | static u16 aggregator_identifier; | |
1856 | ||
1857 | /** | |
1858 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1859 | * @bond: bonding struct to work on | |
1860 | * @tick_resolution: tick duration (millisecond resolution) | |
1861 | * @lacp_fast: boolean. whether fast periodic should be used | |
1862 | * | |
1863 | * Can be called only after the mac address of the bond is set. | |
1864 | */ | |
1865 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) | |
1866 | { | |
1867 | // check that the bond is not initialized yet | |
1868 | if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) { | |
1869 | ||
1870 | aggregator_identifier = 0; | |
1871 | ||
1872 | BOND_AD_INFO(bond).lacp_fast = lacp_fast; | |
1873 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; | |
1874 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1875 | ||
1876 | // initialize how many times this module is called in one second(should be about every 100ms) | |
1877 | ad_ticks_per_sec = tick_resolution; | |
1878 | ||
1879 | // initialize the aggregator selection timer(to activate an aggregation selection after initialize) | |
1880 | BOND_AD_INFO(bond).agg_select_timer = (AD_AGGREGATOR_SELECTION_TIMER * ad_ticks_per_sec); | |
1881 | BOND_AD_INFO(bond).agg_select_mode = AD_BANDWIDTH; | |
1882 | } | |
1883 | } | |
1884 | ||
1885 | /** | |
1886 | * bond_3ad_bind_slave - initialize a slave's port | |
1887 | * @slave: slave struct to work on | |
1888 | * | |
1889 | * Returns: 0 on success | |
1890 | * < 0 on error | |
1891 | */ | |
1892 | int bond_3ad_bind_slave(struct slave *slave) | |
1893 | { | |
1894 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1895 | struct port *port; | |
1896 | struct aggregator *aggregator; | |
1897 | ||
1898 | if (bond == NULL) { | |
4e0952c7 MW |
1899 | printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n", |
1900 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
1901 | return -1; |
1902 | } | |
1903 | ||
1904 | //check that the slave has not been intialized yet. | |
1905 | if (SLAVE_AD_INFO(slave).port.slave != slave) { | |
1906 | ||
1907 | // port initialization | |
1908 | port = &(SLAVE_AD_INFO(slave).port); | |
1909 | ||
1910 | ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); | |
1911 | ||
1912 | port->slave = slave; | |
1913 | port->actor_port_number = SLAVE_AD_INFO(slave).id; | |
1914 | // key is determined according to the link speed, duplex and user key(which is yet not supported) | |
1915 | // ------------------------------------------------------------ | |
1916 | // Port key : | User key | Speed |Duplex| | |
1917 | // ------------------------------------------------------------ | |
1918 | // 16 6 1 0 | |
1919 | port->actor_admin_port_key = 0; // initialize this parameter | |
1920 | port->actor_admin_port_key |= __get_duplex(port); | |
1921 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1922 | port->actor_oper_port_key = port->actor_admin_port_key; | |
1923 | // if the port is not full duplex, then the port should be not lacp Enabled | |
1924 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { | |
1925 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
1926 | } | |
1927 | // actor system is the bond's system | |
1928 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
1929 | // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) | |
1930 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1931 | port->aggregator = NULL; | |
1932 | port->next_port_in_aggregator = NULL; | |
1933 | ||
1934 | __disable_port(port); | |
1935 | __initialize_port_locks(port); | |
1936 | ||
1937 | ||
1938 | // aggregator initialization | |
1939 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1940 | ||
1941 | ad_initialize_agg(aggregator); | |
1942 | ||
1943 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
1944 | aggregator->aggregator_identifier = (++aggregator_identifier); | |
1945 | aggregator->slave = slave; | |
1946 | aggregator->is_active = 0; | |
1947 | aggregator->num_of_ports = 0; | |
1948 | } | |
1949 | ||
1950 | return 0; | |
1951 | } | |
1952 | ||
1953 | /** | |
1954 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1955 | * @slave: slave struct to work on | |
1956 | * | |
1957 | * Search for the aggregator that is related to this port, remove the | |
1958 | * aggregator and assign another aggregator for other port related to it | |
1959 | * (if any), and remove the port. | |
1960 | */ | |
1961 | void bond_3ad_unbind_slave(struct slave *slave) | |
1962 | { | |
1963 | struct port *port, *prev_port, *temp_port; | |
1964 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1965 | int select_new_active_agg = 0; | |
1966 | ||
1967 | // find the aggregator related to this slave | |
1968 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1969 | ||
1970 | // find the port related to this slave | |
1971 | port = &(SLAVE_AD_INFO(slave).port); | |
1972 | ||
1973 | // if slave is null, the whole port is not initialized | |
1974 | if (!port->slave) { | |
4e0952c7 MW |
1975 | printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to " |
1976 | "unbind an uninitialized port on %s\n", | |
1977 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
1978 | return; |
1979 | } | |
1980 | ||
1981 | dprintk("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier); | |
1982 | ||
1983 | /* Tell the partner that this port is not suitable for aggregation */ | |
1984 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1985 | __update_lacpdu_from_port(port); | |
1986 | ad_lacpdu_send(port); | |
1987 | ||
1988 | // check if this aggregator is occupied | |
1989 | if (aggregator->lag_ports) { | |
1990 | // check if there are other ports related to this aggregator except | |
1991 | // the port related to this slave(thats ensure us that there is a | |
1992 | // reason to search for new aggregator, and that we will find one | |
1993 | if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { | |
1994 | // find new aggregator for the related port(s) | |
1995 | new_aggregator = __get_first_agg(port); | |
1996 | for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { | |
1997 | // if the new aggregator is empty, or it connected to to our port only | |
1998 | if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) { | |
1999 | break; | |
2000 | } | |
2001 | } | |
2002 | // if new aggregator found, copy the aggregator's parameters | |
2003 | // and connect the related lag_ports to the new aggregator | |
2004 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
2005 | dprintk("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier); | |
2006 | ||
2007 | if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { | |
4e0952c7 MW |
2008 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2009 | aggregator->slave->dev->master->name); | |
1da177e4 LT |
2010 | // select new active aggregator |
2011 | select_new_active_agg = 1; | |
2012 | } | |
2013 | ||
2014 | new_aggregator->is_individual = aggregator->is_individual; | |
2015 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
2016 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
2017 | new_aggregator->partner_system = aggregator->partner_system; | |
2018 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
2019 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
2020 | new_aggregator->receive_state = aggregator->receive_state; | |
2021 | new_aggregator->transmit_state = aggregator->transmit_state; | |
2022 | new_aggregator->lag_ports = aggregator->lag_ports; | |
2023 | new_aggregator->is_active = aggregator->is_active; | |
2024 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
2025 | ||
2026 | // update the information that is written on the ports about the aggregator | |
2027 | for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) { | |
2028 | temp_port->aggregator=new_aggregator; | |
2029 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; | |
2030 | } | |
2031 | ||
2032 | // clear the aggregator | |
2033 | ad_clear_agg(aggregator); | |
2034 | ||
2035 | if (select_new_active_agg) { | |
2036 | ad_agg_selection_logic(__get_first_agg(port)); | |
2037 | } | |
2038 | } else { | |
4e0952c7 MW |
2039 | printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, " |
2040 | "and could not find a new aggregator for its ports\n", | |
2041 | slave->dev->master->name); | |
1da177e4 LT |
2042 | } |
2043 | } else { // in case that the only port related to this aggregator is the one we want to remove | |
2044 | select_new_active_agg = aggregator->is_active; | |
2045 | // clear the aggregator | |
2046 | ad_clear_agg(aggregator); | |
2047 | if (select_new_active_agg) { | |
4e0952c7 MW |
2048 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2049 | slave->dev->master->name); | |
1da177e4 LT |
2050 | // select new active aggregator |
2051 | ad_agg_selection_logic(__get_first_agg(port)); | |
2052 | } | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | dprintk("Unbinding port %d\n", port->actor_port_number); | |
2057 | // find the aggregator that this port is connected to | |
2058 | temp_aggregator = __get_first_agg(port); | |
2059 | for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { | |
2060 | prev_port = NULL; | |
2061 | // search the port in the aggregator's related ports | |
2062 | for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { | |
2063 | if (temp_port == port) { // the aggregator found - detach the port from this aggregator | |
2064 | if (prev_port) { | |
2065 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; | |
2066 | } else { | |
2067 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; | |
2068 | } | |
2069 | temp_aggregator->num_of_ports--; | |
2070 | if (temp_aggregator->num_of_ports==0) { | |
2071 | select_new_active_agg = temp_aggregator->is_active; | |
2072 | // clear the aggregator | |
2073 | ad_clear_agg(temp_aggregator); | |
2074 | if (select_new_active_agg) { | |
4e0952c7 MW |
2075 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2076 | slave->dev->master->name); | |
1da177e4 LT |
2077 | // select new active aggregator |
2078 | ad_agg_selection_logic(__get_first_agg(port)); | |
2079 | } | |
2080 | } | |
2081 | break; | |
2082 | } | |
2083 | } | |
2084 | } | |
2085 | port->slave=NULL; | |
2086 | } | |
2087 | ||
2088 | /** | |
2089 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2090 | * @bond: bonding struct to work on | |
2091 | * | |
2092 | * The state machine handling concept in this module is to check every tick | |
2093 | * which state machine should operate any function. The execution order is | |
2094 | * round robin, so when we have an interaction between state machines, the | |
2095 | * reply of one to each other might be delayed until next tick. | |
2096 | * | |
2097 | * This function also complete the initialization when the agg_select_timer | |
2098 | * times out, and it selects an aggregator for the ports that are yet not | |
2099 | * related to any aggregator, and selects the active aggregator for a bond. | |
2100 | */ | |
2101 | void bond_3ad_state_machine_handler(struct bonding *bond) | |
2102 | { | |
2103 | struct port *port; | |
2104 | struct aggregator *aggregator; | |
2105 | ||
2106 | read_lock(&bond->lock); | |
2107 | ||
2108 | if (bond->kill_timers) { | |
2109 | goto out; | |
2110 | } | |
2111 | ||
2112 | //check if there are any slaves | |
2113 | if (bond->slave_cnt == 0) { | |
2114 | goto re_arm; | |
2115 | } | |
2116 | ||
2117 | // check if agg_select_timer timer after initialize is timed out | |
2118 | if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
2119 | // select the active aggregator for the bond | |
2120 | if ((port = __get_first_port(bond))) { | |
2121 | if (!port->slave) { | |
4e0952c7 MW |
2122 | printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is " |
2123 | "uninitialized\n", bond->dev->name); | |
1da177e4 LT |
2124 | goto re_arm; |
2125 | } | |
2126 | ||
2127 | aggregator = __get_first_agg(port); | |
2128 | ad_agg_selection_logic(aggregator); | |
2129 | } | |
2130 | } | |
2131 | ||
2132 | // for each port run the state machines | |
2133 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2134 | if (!port->slave) { | |
4e0952c7 MW |
2135 | printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized " |
2136 | "port\n", bond->dev->name); | |
1da177e4 LT |
2137 | goto re_arm; |
2138 | } | |
2139 | ||
2140 | ad_rx_machine(NULL, port); | |
2141 | ad_periodic_machine(port); | |
2142 | ad_port_selection_logic(port); | |
2143 | ad_mux_machine(port); | |
2144 | ad_tx_machine(port); | |
2145 | ||
2146 | // turn off the BEGIN bit, since we already handled it | |
2147 | if (port->sm_vars & AD_PORT_BEGIN) { | |
2148 | port->sm_vars &= ~AD_PORT_BEGIN; | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | re_arm: | |
2153 | mod_timer(&(BOND_AD_INFO(bond).ad_timer), jiffies + ad_delta_in_ticks); | |
2154 | out: | |
2155 | read_unlock(&bond->lock); | |
2156 | } | |
2157 | ||
2158 | /** | |
2159 | * bond_3ad_rx_indication - handle a received frame | |
2160 | * @lacpdu: received lacpdu | |
2161 | * @slave: slave struct to work on | |
2162 | * @length: length of the data received | |
2163 | * | |
2164 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2165 | * received frames (loopback). Since only the payload is given to this | |
2166 | * function, it check for loopback. | |
2167 | */ | |
2168 | static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) | |
2169 | { | |
2170 | struct port *port; | |
2171 | ||
2172 | if (length >= sizeof(struct lacpdu)) { | |
2173 | ||
2174 | port = &(SLAVE_AD_INFO(slave).port); | |
2175 | ||
2176 | if (!port->slave) { | |
4e0952c7 MW |
2177 | printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is " |
2178 | "uninitialized\n", slave->dev->name, slave->dev->master->name); | |
1da177e4 LT |
2179 | return; |
2180 | } | |
2181 | ||
2182 | switch (lacpdu->subtype) { | |
2183 | case AD_TYPE_LACPDU: | |
1da177e4 LT |
2184 | dprintk("Received LACPDU on port %d\n", port->actor_port_number); |
2185 | ad_rx_machine(lacpdu, port); | |
2186 | break; | |
2187 | ||
2188 | case AD_TYPE_MARKER: | |
2189 | // No need to convert fields to Little Endian since we don't use the marker's fields. | |
2190 | ||
2191 | switch (((struct marker *)lacpdu)->tlv_type) { | |
2192 | case AD_MARKER_INFORMATION_SUBTYPE: | |
2193 | dprintk("Received Marker Information on port %d\n", port->actor_port_number); | |
2194 | ad_marker_info_received((struct marker *)lacpdu, port); | |
2195 | break; | |
2196 | ||
2197 | case AD_MARKER_RESPONSE_SUBTYPE: | |
2198 | dprintk("Received Marker Response on port %d\n", port->actor_port_number); | |
2199 | ad_marker_response_received((struct marker *)lacpdu, port); | |
2200 | break; | |
2201 | ||
2202 | default: | |
2203 | dprintk("Received an unknown Marker subtype on slot %d\n", port->actor_port_number); | |
2204 | } | |
2205 | } | |
2206 | } | |
2207 | } | |
2208 | ||
2209 | /** | |
2210 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2211 | * @slave: slave struct to work on | |
2212 | * | |
2213 | * Handle reselection of aggregator (if needed) for this port. | |
2214 | */ | |
2215 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2216 | { | |
2217 | struct port *port; | |
2218 | ||
2219 | port = &(SLAVE_AD_INFO(slave).port); | |
2220 | ||
2221 | // if slave is null, the whole port is not initialized | |
2222 | if (!port->slave) { | |
4e0952c7 MW |
2223 | printk(KERN_WARNING DRV_NAME ": Warning: %s: speed " |
2224 | "changed for uninitialized port on %s\n", | |
2225 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2226 | return; |
2227 | } | |
2228 | ||
2229 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
2230 | port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
2231 | dprintk("Port %d changed speed\n", port->actor_port_number); | |
2232 | // there is no need to reselect a new aggregator, just signal the | |
2233 | // state machines to reinitialize | |
2234 | port->sm_vars |= AD_PORT_BEGIN; | |
2235 | } | |
2236 | ||
2237 | /** | |
2238 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2239 | * @slave: slave struct to work on | |
2240 | * | |
2241 | * Handle reselection of aggregator (if needed) for this port. | |
2242 | */ | |
2243 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2244 | { | |
2245 | struct port *port; | |
2246 | ||
2247 | port=&(SLAVE_AD_INFO(slave).port); | |
2248 | ||
2249 | // if slave is null, the whole port is not initialized | |
2250 | if (!port->slave) { | |
4e0952c7 MW |
2251 | printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed " |
2252 | "for uninitialized port on %s\n", | |
2253 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2254 | return; |
2255 | } | |
2256 | ||
2257 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
2258 | port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); | |
2259 | dprintk("Port %d changed duplex\n", port->actor_port_number); | |
2260 | // there is no need to reselect a new aggregator, just signal the | |
2261 | // state machines to reinitialize | |
2262 | port->sm_vars |= AD_PORT_BEGIN; | |
2263 | } | |
2264 | ||
2265 | /** | |
2266 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2267 | * @slave: slave struct to work on | |
2268 | * @status: whether the link is now up or down | |
2269 | * | |
2270 | * Handle reselection of aggregator (if needed) for this port. | |
2271 | */ | |
2272 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2273 | { | |
2274 | struct port *port; | |
2275 | ||
2276 | port = &(SLAVE_AD_INFO(slave).port); | |
2277 | ||
2278 | // if slave is null, the whole port is not initialized | |
2279 | if (!port->slave) { | |
4e0952c7 MW |
2280 | printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for " |
2281 | "uninitialized port on %s\n", | |
2282 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2283 | return; |
2284 | } | |
2285 | ||
2286 | // 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) | |
2287 | // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report | |
2288 | if (link == BOND_LINK_UP) { | |
2289 | port->is_enabled = 1; | |
2290 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
2291 | port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); | |
2292 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
2293 | port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
2294 | } else { | |
2295 | /* link has failed */ | |
2296 | port->is_enabled = 0; | |
2297 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
2298 | port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS); | |
2299 | } | |
2300 | //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); | |
2301 | // there is no need to reselect a new aggregator, just signal the | |
2302 | // state machines to reinitialize | |
2303 | port->sm_vars |= AD_PORT_BEGIN; | |
2304 | } | |
2305 | ||
ff59c456 | 2306 | /* |
031ae4de | 2307 | * set link state for bonding master: if we have an active |
ff59c456 JV |
2308 | * aggregator, we're up, if not, we're down. Presumes that we cannot |
2309 | * have an active aggregator if there are no slaves with link up. | |
2310 | * | |
031ae4de JV |
2311 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2312 | * | |
ff59c456 JV |
2313 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2314 | * change, nonzero if it does. | |
2315 | */ | |
2316 | int bond_3ad_set_carrier(struct bonding *bond) | |
2317 | { | |
031ae4de | 2318 | if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) { |
ff59c456 JV |
2319 | if (!netif_carrier_ok(bond->dev)) { |
2320 | netif_carrier_on(bond->dev); | |
2321 | return 1; | |
2322 | } | |
2323 | return 0; | |
2324 | } | |
2325 | ||
2326 | if (netif_carrier_ok(bond->dev)) { | |
2327 | netif_carrier_off(bond->dev); | |
2328 | return 1; | |
2329 | } | |
2330 | return 0; | |
2331 | } | |
2332 | ||
1da177e4 LT |
2333 | /** |
2334 | * bond_3ad_get_active_agg_info - get information of the active aggregator | |
2335 | * @bond: bonding struct to work on | |
2336 | * @ad_info: ad_info struct to fill with the bond's info | |
2337 | * | |
2338 | * Returns: 0 on success | |
2339 | * < 0 on error | |
2340 | */ | |
2341 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2342 | { | |
2343 | struct aggregator *aggregator = NULL; | |
2344 | struct port *port; | |
2345 | ||
2346 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2347 | if (port->aggregator && port->aggregator->is_active) { | |
2348 | aggregator = port->aggregator; | |
2349 | break; | |
2350 | } | |
2351 | } | |
2352 | ||
2353 | if (aggregator) { | |
2354 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2355 | ad_info->ports = aggregator->num_of_ports; | |
2356 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2357 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2358 | memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); | |
2359 | return 0; | |
2360 | } | |
2361 | ||
2362 | return -1; | |
2363 | } | |
2364 | ||
2365 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) | |
2366 | { | |
2367 | struct slave *slave, *start_at; | |
2368 | struct bonding *bond = dev->priv; | |
1da177e4 LT |
2369 | int slave_agg_no; |
2370 | int slaves_in_agg; | |
2371 | int agg_id; | |
2372 | int i; | |
2373 | struct ad_info ad_info; | |
2374 | int res = 1; | |
2375 | ||
2376 | /* make sure that the slaves list will | |
2377 | * not change during tx | |
2378 | */ | |
2379 | read_lock(&bond->lock); | |
2380 | ||
2381 | if (!BOND_IS_OK(bond)) { | |
2382 | goto out; | |
2383 | } | |
2384 | ||
2385 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
4e0952c7 MW |
2386 | printk(KERN_DEBUG DRV_NAME ": %s: Error: " |
2387 | "bond_3ad_get_active_agg_info failed\n", dev->name); | |
1da177e4 LT |
2388 | goto out; |
2389 | } | |
2390 | ||
2391 | slaves_in_agg = ad_info.ports; | |
2392 | agg_id = ad_info.aggregator_id; | |
2393 | ||
2394 | if (slaves_in_agg == 0) { | |
2395 | /*the aggregator is empty*/ | |
4e0952c7 MW |
2396 | printk(KERN_DEBUG DRV_NAME ": %s: Error: active " |
2397 | "aggregator is empty\n", | |
2398 | dev->name); | |
1da177e4 LT |
2399 | goto out; |
2400 | } | |
2401 | ||
169a3e66 | 2402 | slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg); |
1da177e4 LT |
2403 | |
2404 | bond_for_each_slave(bond, slave, i) { | |
2405 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2406 | ||
2407 | if (agg && (agg->aggregator_identifier == agg_id)) { | |
2408 | slave_agg_no--; | |
2409 | if (slave_agg_no < 0) { | |
2410 | break; | |
2411 | } | |
2412 | } | |
2413 | } | |
2414 | ||
2415 | if (slave_agg_no >= 0) { | |
4e0952c7 MW |
2416 | printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on " |
2417 | "for aggregator ID %d\n", dev->name, agg_id); | |
1da177e4 LT |
2418 | goto out; |
2419 | } | |
2420 | ||
2421 | start_at = slave; | |
2422 | ||
2423 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
2424 | int slave_agg_id = 0; | |
2425 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2426 | ||
2427 | if (agg) { | |
2428 | slave_agg_id = agg->aggregator_identifier; | |
2429 | } | |
2430 | ||
2431 | if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { | |
2432 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
2433 | break; | |
2434 | } | |
2435 | } | |
2436 | ||
2437 | out: | |
2438 | if (res) { | |
2439 | /* no suitable interface, frame not sent */ | |
2440 | dev_kfree_skb(skb); | |
2441 | } | |
2442 | read_unlock(&bond->lock); | |
2443 | return 0; | |
2444 | } | |
2445 | ||
f2ccd8fa | 2446 | int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev) |
1da177e4 LT |
2447 | { |
2448 | struct bonding *bond = dev->priv; | |
2449 | struct slave *slave = NULL; | |
2450 | int ret = NET_RX_DROP; | |
2451 | ||
e730c155 EB |
2452 | if (dev->nd_net != &init_net) |
2453 | goto out; | |
2454 | ||
f2ccd8fa | 2455 | if (!(dev->flags & IFF_MASTER)) |
1da177e4 | 2456 | goto out; |
1da177e4 LT |
2457 | |
2458 | read_lock(&bond->lock); | |
f2ccd8fa DM |
2459 | slave = bond_get_slave_by_dev((struct bonding *)dev->priv, orig_dev); |
2460 | if (!slave) | |
1da177e4 | 2461 | goto out_unlock; |
1da177e4 LT |
2462 | |
2463 | bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); | |
2464 | ||
2465 | ret = NET_RX_SUCCESS; | |
2466 | ||
2467 | out_unlock: | |
2468 | read_unlock(&bond->lock); | |
2469 | out: | |
2470 | dev_kfree_skb(skb); | |
2471 | ||
2472 | return ret; | |
2473 | } | |
2474 |