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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 | ||
1da177e4 LT |
23 | #include <linux/skbuff.h> |
24 | #include <linux/if_ether.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/ethtool.h> | |
fd989c83 | 28 | #include <linux/etherdevice.h> |
1da177e4 LT |
29 | #include <linux/if_bonding.h> |
30 | #include <linux/pkt_sched.h> | |
e730c155 | 31 | #include <net/net_namespace.h> |
1da177e4 LT |
32 | #include "bonding.h" |
33 | #include "bond_3ad.h" | |
34 | ||
35 | // General definitions | |
36 | #define AD_SHORT_TIMEOUT 1 | |
37 | #define AD_LONG_TIMEOUT 0 | |
38 | #define AD_STANDBY 0x2 | |
39 | #define AD_MAX_TX_IN_SECOND 3 | |
40 | #define AD_COLLECTOR_MAX_DELAY 0 | |
41 | ||
42 | // Timer definitions(43.4.4 in the 802.3ad standard) | |
43 | #define AD_FAST_PERIODIC_TIME 1 | |
44 | #define AD_SLOW_PERIODIC_TIME 30 | |
45 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
46 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
47 | #define AD_CHURN_DETECTION_TIME 60 | |
48 | #define AD_AGGREGATE_WAIT_TIME 2 | |
49 | ||
50 | // Port state definitions(43.4.2.2 in the 802.3ad standard) | |
51 | #define AD_STATE_LACP_ACTIVITY 0x1 | |
52 | #define AD_STATE_LACP_TIMEOUT 0x2 | |
53 | #define AD_STATE_AGGREGATION 0x4 | |
54 | #define AD_STATE_SYNCHRONIZATION 0x8 | |
55 | #define AD_STATE_COLLECTING 0x10 | |
56 | #define AD_STATE_DISTRIBUTING 0x20 | |
57 | #define AD_STATE_DEFAULTED 0x40 | |
58 | #define AD_STATE_EXPIRED 0x80 | |
59 | ||
60 | // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) | |
61 | #define AD_PORT_BEGIN 0x1 | |
62 | #define AD_PORT_LACP_ENABLED 0x2 | |
63 | #define AD_PORT_ACTOR_CHURN 0x4 | |
64 | #define AD_PORT_PARTNER_CHURN 0x8 | |
65 | #define AD_PORT_READY 0x10 | |
66 | #define AD_PORT_READY_N 0x20 | |
67 | #define AD_PORT_MATCHED 0x40 | |
68 | #define AD_PORT_STANDBY 0x80 | |
69 | #define AD_PORT_SELECTED 0x100 | |
70 | #define AD_PORT_MOVED 0x200 | |
71 | ||
72 | // Port Key definitions | |
73 | // key is determined according to the link speed, duplex and | |
74 | // user key(which is yet not supported) | |
75 | // ------------------------------------------------------------ | |
76 | // Port key : | User key | Speed |Duplex| | |
77 | // ------------------------------------------------------------ | |
78 | // 16 6 1 0 | |
79 | #define AD_DUPLEX_KEY_BITS 0x1 | |
80 | #define AD_SPEED_KEY_BITS 0x3E | |
81 | #define AD_USER_KEY_BITS 0xFFC0 | |
82 | ||
83 | //dalloun | |
84 | #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 | |
85 | #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 | |
86 | #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 | |
87 | #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 | |
94dbffd5 | 88 | #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 |
1da177e4 LT |
89 | //endalloun |
90 | ||
91 | // compare MAC addresses | |
92 | #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) | |
93 | ||
94 | static struct mac_addr null_mac_addr = {{0, 0, 0, 0, 0, 0}}; | |
95 | static u16 ad_ticks_per_sec; | |
96 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
97 | ||
1da177e4 LT |
98 | // ================= main 802.3ad protocol functions ================== |
99 | static int ad_lacpdu_send(struct port *port); | |
1c3f0b8e | 100 | static int ad_marker_send(struct port *port, struct bond_marker *marker); |
1da177e4 LT |
101 | static void ad_mux_machine(struct port *port); |
102 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); | |
103 | static void ad_tx_machine(struct port *port); | |
104 | static void ad_periodic_machine(struct port *port); | |
105 | static void ad_port_selection_logic(struct port *port); | |
106 | static void ad_agg_selection_logic(struct aggregator *aggregator); | |
107 | static void ad_clear_agg(struct aggregator *aggregator); | |
108 | static void ad_initialize_agg(struct aggregator *aggregator); | |
109 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
110 | static void ad_initialize_lacpdu(struct lacpdu *Lacpdu); | |
111 | static void ad_enable_collecting_distributing(struct port *port); | |
112 | static void ad_disable_collecting_distributing(struct port *port); | |
1c3f0b8e MD |
113 | static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); |
114 | static void ad_marker_response_received(struct bond_marker *marker, struct port *port); | |
1da177e4 LT |
115 | |
116 | ||
117 | ///////////////////////////////////////////////////////////////////////////////// | |
118 | // ================= api to bonding and kernel code ================== | |
119 | ///////////////////////////////////////////////////////////////////////////////// | |
120 | ||
121 | /** | |
122 | * __get_bond_by_port - get the port's bonding struct | |
123 | * @port: the port we're looking at | |
124 | * | |
125 | * Return @port's bonding struct, or %NULL if it can't be found. | |
126 | */ | |
127 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
128 | { | |
129 | if (port->slave == NULL) { | |
130 | return NULL; | |
131 | } | |
132 | ||
133 | return bond_get_bond_by_slave(port->slave); | |
134 | } | |
135 | ||
136 | /** | |
137 | * __get_first_port - get the first port in the bond | |
138 | * @bond: the bond we're looking at | |
139 | * | |
140 | * Return the port of the first slave in @bond, or %NULL if it can't be found. | |
141 | */ | |
142 | static inline struct port *__get_first_port(struct bonding *bond) | |
143 | { | |
144 | if (bond->slave_cnt == 0) { | |
145 | return NULL; | |
146 | } | |
147 | ||
148 | return &(SLAVE_AD_INFO(bond->first_slave).port); | |
149 | } | |
150 | ||
151 | /** | |
152 | * __get_next_port - get the next port in the bond | |
153 | * @port: the port we're looking at | |
154 | * | |
155 | * Return the port of the slave that is next in line of @port's slave in the | |
156 | * bond, or %NULL if it can't be found. | |
157 | */ | |
158 | static inline struct port *__get_next_port(struct port *port) | |
159 | { | |
160 | struct bonding *bond = __get_bond_by_port(port); | |
161 | struct slave *slave = port->slave; | |
162 | ||
163 | // If there's no bond for this port, or this is the last slave | |
164 | if ((bond == NULL) || (slave->next == bond->first_slave)) { | |
165 | return NULL; | |
166 | } | |
167 | ||
168 | return &(SLAVE_AD_INFO(slave->next).port); | |
169 | } | |
170 | ||
171 | /** | |
172 | * __get_first_agg - get the first aggregator in the bond | |
173 | * @bond: the bond we're looking at | |
174 | * | |
175 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
176 | * found. | |
177 | */ | |
178 | static inline struct aggregator *__get_first_agg(struct port *port) | |
179 | { | |
180 | struct bonding *bond = __get_bond_by_port(port); | |
181 | ||
182 | // If there's no bond for this port, or bond has no slaves | |
183 | if ((bond == NULL) || (bond->slave_cnt == 0)) { | |
184 | return NULL; | |
185 | } | |
186 | ||
187 | return &(SLAVE_AD_INFO(bond->first_slave).aggregator); | |
188 | } | |
189 | ||
190 | /** | |
191 | * __get_next_agg - get the next aggregator in the bond | |
192 | * @aggregator: the aggregator we're looking at | |
193 | * | |
194 | * Return the aggregator of the slave that is next in line of @aggregator's | |
195 | * slave in the bond, or %NULL if it can't be found. | |
196 | */ | |
197 | static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) | |
198 | { | |
199 | struct slave *slave = aggregator->slave; | |
200 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
201 | ||
202 | // If there's no bond for this aggregator, or this is the last slave | |
203 | if ((bond == NULL) || (slave->next == bond->first_slave)) { | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | return &(SLAVE_AD_INFO(slave->next).aggregator); | |
208 | } | |
209 | ||
fd989c83 JV |
210 | /* |
211 | * __agg_has_partner | |
212 | * | |
213 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
214 | * address for the partner). Return 0 if not. | |
215 | */ | |
216 | static inline int __agg_has_partner(struct aggregator *agg) | |
217 | { | |
218 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
219 | } | |
220 | ||
1da177e4 LT |
221 | /** |
222 | * __disable_port - disable the port's slave | |
223 | * @port: the port we're looking at | |
224 | * | |
225 | */ | |
226 | static inline void __disable_port(struct port *port) | |
227 | { | |
228 | bond_set_slave_inactive_flags(port->slave); | |
229 | } | |
230 | ||
231 | /** | |
232 | * __enable_port - enable the port's slave, if it's up | |
233 | * @port: the port we're looking at | |
234 | * | |
235 | */ | |
236 | static inline void __enable_port(struct port *port) | |
237 | { | |
238 | struct slave *slave = port->slave; | |
239 | ||
240 | if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) { | |
241 | bond_set_slave_active_flags(slave); | |
242 | } | |
243 | } | |
244 | ||
245 | /** | |
246 | * __port_is_enabled - check if the port's slave is in active state | |
247 | * @port: the port we're looking at | |
248 | * | |
249 | */ | |
250 | static inline int __port_is_enabled(struct port *port) | |
251 | { | |
252 | return(port->slave->state == BOND_STATE_ACTIVE); | |
253 | } | |
254 | ||
255 | /** | |
256 | * __get_agg_selection_mode - get the aggregator selection mode | |
257 | * @port: the port we're looking at | |
258 | * | |
fd989c83 | 259 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
260 | */ |
261 | static inline u32 __get_agg_selection_mode(struct port *port) | |
262 | { | |
263 | struct bonding *bond = __get_bond_by_port(port); | |
264 | ||
265 | if (bond == NULL) { | |
fd989c83 | 266 | return BOND_AD_STABLE; |
1da177e4 LT |
267 | } |
268 | ||
269 | return BOND_AD_INFO(bond).agg_select_mode; | |
270 | } | |
271 | ||
272 | /** | |
273 | * __check_agg_selection_timer - check if the selection timer has expired | |
274 | * @port: the port we're looking at | |
275 | * | |
276 | */ | |
277 | static inline int __check_agg_selection_timer(struct port *port) | |
278 | { | |
279 | struct bonding *bond = __get_bond_by_port(port); | |
280 | ||
281 | if (bond == NULL) { | |
282 | return 0; | |
283 | } | |
284 | ||
285 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
286 | } | |
287 | ||
288 | /** | |
289 | * __get_rx_machine_lock - lock the port's RX machine | |
290 | * @port: the port we're looking at | |
291 | * | |
292 | */ | |
293 | static inline void __get_rx_machine_lock(struct port *port) | |
294 | { | |
2bf86b7a | 295 | spin_lock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); |
1da177e4 LT |
296 | } |
297 | ||
298 | /** | |
299 | * __release_rx_machine_lock - unlock the port's RX machine | |
300 | * @port: the port we're looking at | |
301 | * | |
302 | */ | |
303 | static inline void __release_rx_machine_lock(struct port *port) | |
304 | { | |
2bf86b7a | 305 | spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); |
1da177e4 LT |
306 | } |
307 | ||
308 | /** | |
309 | * __get_link_speed - get a port's speed | |
310 | * @port: the port we're looking at | |
311 | * | |
312 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
313 | * 0, | |
314 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
315 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
316 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
317 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
318 | */ |
319 | static u16 __get_link_speed(struct port *port) | |
320 | { | |
321 | struct slave *slave = port->slave; | |
322 | u16 speed; | |
323 | ||
324 | /* this if covers only a special case: when the configuration starts with | |
325 | * link down, it sets the speed to 0. | |
326 | * This is done in spite of the fact that the e100 driver reports 0 to be | |
327 | * compatible with MVT in the future.*/ | |
328 | if (slave->link != BOND_LINK_UP) { | |
329 | speed=0; | |
330 | } else { | |
331 | switch (slave->speed) { | |
332 | case SPEED_10: | |
333 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
334 | break; | |
335 | ||
336 | case SPEED_100: | |
337 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
338 | break; | |
339 | ||
340 | case SPEED_1000: | |
341 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
342 | break; | |
343 | ||
94dbffd5 JV |
344 | case SPEED_10000: |
345 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
346 | break; | |
347 | ||
1da177e4 LT |
348 | default: |
349 | speed = 0; // unknown speed value from ethtool. shouldn't happen | |
350 | break; | |
351 | } | |
352 | } | |
353 | ||
5a03cdb7 | 354 | pr_debug("Port %d Received link speed %d update from adapter\n", port->actor_port_number, speed); |
1da177e4 LT |
355 | return speed; |
356 | } | |
357 | ||
358 | /** | |
359 | * __get_duplex - get a port's duplex | |
360 | * @port: the port we're looking at | |
361 | * | |
362 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
363 | * 0x01 if in full duplex | |
364 | * 0x00 otherwise | |
365 | */ | |
366 | static u8 __get_duplex(struct port *port) | |
367 | { | |
368 | struct slave *slave = port->slave; | |
369 | ||
370 | u8 retval; | |
371 | ||
372 | // handling a special case: when the configuration starts with | |
373 | // link down, it sets the duplex to 0. | |
374 | if (slave->link != BOND_LINK_UP) { | |
375 | retval=0x0; | |
376 | } else { | |
377 | switch (slave->duplex) { | |
378 | case DUPLEX_FULL: | |
379 | retval=0x1; | |
5a03cdb7 | 380 | pr_debug("Port %d Received status full duplex update from adapter\n", port->actor_port_number); |
1da177e4 LT |
381 | break; |
382 | case DUPLEX_HALF: | |
383 | default: | |
384 | retval=0x0; | |
5a03cdb7 | 385 | pr_debug("Port %d Received status NOT full duplex update from adapter\n", port->actor_port_number); |
1da177e4 LT |
386 | break; |
387 | } | |
388 | } | |
389 | return retval; | |
390 | } | |
391 | ||
392 | /** | |
393 | * __initialize_port_locks - initialize a port's RX machine spinlock | |
394 | * @port: the port we're looking at | |
395 | * | |
396 | */ | |
397 | static inline void __initialize_port_locks(struct port *port) | |
398 | { | |
399 | // make sure it isn't called twice | |
400 | spin_lock_init(&(SLAVE_AD_INFO(port->slave).rx_machine_lock)); | |
401 | } | |
402 | ||
403 | //conversions | |
1da177e4 LT |
404 | |
405 | /** | |
406 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
407 | * @timer_type: which timer to operate | |
408 | * @par: timer parameter. see below | |
409 | * | |
410 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
411 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
412 | * %SLOW_PERIODIC_TIME. | |
413 | */ | |
414 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
415 | { | |
416 | u16 retval=0; //to silence the compiler | |
417 | ||
418 | switch (timer_type) { | |
419 | case AD_CURRENT_WHILE_TIMER: // for rx machine usage | |
420 | if (par) { // for short or long timeout | |
421 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout | |
422 | } else { | |
423 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout | |
424 | } | |
425 | break; | |
426 | case AD_ACTOR_CHURN_TIMER: // for local churn machine | |
427 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
428 | break; | |
429 | case AD_PERIODIC_TIMER: // for periodic machine | |
430 | retval = (par*ad_ticks_per_sec); // long timeout | |
431 | break; | |
432 | case AD_PARTNER_CHURN_TIMER: // for remote churn machine | |
433 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
434 | break; | |
435 | case AD_WAIT_WHILE_TIMER: // for selection machine | |
436 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
437 | break; | |
438 | } | |
439 | return retval; | |
440 | } | |
441 | ||
442 | ||
443 | ///////////////////////////////////////////////////////////////////////////////// | |
444 | // ================= ad_rx_machine helper functions ================== | |
445 | ///////////////////////////////////////////////////////////////////////////////// | |
446 | ||
447 | /** | |
448 | * __record_pdu - record parameters from a received lacpdu | |
449 | * @lacpdu: the lacpdu we've received | |
450 | * @port: the port we're looking at | |
451 | * | |
452 | * Record the parameter values for the Actor carried in a received lacpdu as | |
453 | * the current partner operational parameter values and sets | |
454 | * actor_oper_port_state.defaulted to FALSE. | |
455 | */ | |
456 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
457 | { | |
1da177e4 | 458 | if (lacpdu && port) { |
b99d6ba9 HE |
459 | struct port_params *partner = &port->partner_oper; |
460 | ||
1da177e4 | 461 | // record the new parameter values for the partner operational |
b99d6ba9 HE |
462 | partner->port_number = ntohs(lacpdu->actor_port); |
463 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
464 | partner->system = lacpdu->actor_system; | |
465 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
466 | partner->key = ntohs(lacpdu->actor_key); | |
467 | partner->port_state = lacpdu->actor_state; | |
1da177e4 LT |
468 | |
469 | // set actor_oper_port_state.defaulted to FALSE | |
470 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; | |
471 | ||
472 | // set the partner sync. to on if the partner is sync. and the port is matched | |
473 | if ((port->sm_vars & AD_PORT_MATCHED) && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { | |
b99d6ba9 | 474 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
1da177e4 | 475 | } else { |
b99d6ba9 | 476 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
477 | } |
478 | } | |
479 | } | |
480 | ||
481 | /** | |
482 | * __record_default - record default parameters | |
483 | * @port: the port we're looking at | |
484 | * | |
485 | * This function records the default parameter values for the partner carried | |
486 | * in the Partner Admin parameters as the current partner operational parameter | |
487 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
488 | */ | |
489 | static void __record_default(struct port *port) | |
490 | { | |
1da177e4 LT |
491 | if (port) { |
492 | // record the partner admin parameters | |
5eefd1ad HE |
493 | memcpy(&port->partner_oper, &port->partner_admin, |
494 | sizeof(struct port_params)); | |
1da177e4 LT |
495 | |
496 | // set actor_oper_port_state.defaulted to true | |
497 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; | |
498 | } | |
499 | } | |
500 | ||
501 | /** | |
502 | * __update_selected - update a port's Selected variable from a received lacpdu | |
503 | * @lacpdu: the lacpdu we've received | |
504 | * @port: the port we're looking at | |
505 | * | |
506 | * Update the value of the selected variable, using parameter values from a | |
507 | * newly received lacpdu. The parameter values for the Actor carried in the | |
508 | * received PDU are compared with the corresponding operational parameter | |
509 | * values for the ports partner. If one or more of the comparisons shows that | |
510 | * the value(s) received in the PDU differ from the current operational values, | |
511 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
512 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
513 | */ | |
514 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
515 | { | |
1da177e4 | 516 | if (lacpdu && port) { |
ce6a49ad HE |
517 | const struct port_params *partner = &port->partner_oper; |
518 | ||
1da177e4 | 519 | // check if any parameter is different |
ce6a49ad HE |
520 | if (ntohs(lacpdu->actor_port) != partner->port_number |
521 | || ntohs(lacpdu->actor_port_priority) != partner->port_priority | |
522 | || MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) | |
523 | || ntohs(lacpdu->actor_system_priority) != partner->system_priority | |
524 | || ntohs(lacpdu->actor_key) != partner->key | |
525 | || (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
526 | // update the state machine Selected variable |
527 | port->sm_vars &= ~AD_PORT_SELECTED; | |
528 | } | |
529 | } | |
530 | } | |
531 | ||
532 | /** | |
533 | * __update_default_selected - update a port's Selected variable from Partner | |
534 | * @port: the port we're looking at | |
535 | * | |
536 | * This function updates the value of the selected variable, using the partner | |
537 | * administrative parameter values. The administrative values are compared with | |
538 | * the corresponding operational parameter values for the partner. If one or | |
539 | * more of the comparisons shows that the administrative value(s) differ from | |
540 | * the current operational values, then Selected is set to FALSE and | |
541 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
542 | * Selected remains unchanged. | |
543 | */ | |
544 | static void __update_default_selected(struct port *port) | |
545 | { | |
1da177e4 | 546 | if (port) { |
3c52065f HE |
547 | const struct port_params *admin = &port->partner_admin; |
548 | const struct port_params *oper = &port->partner_oper; | |
549 | ||
1da177e4 | 550 | // check if any parameter is different |
3c52065f HE |
551 | if (admin->port_number != oper->port_number |
552 | || admin->port_priority != oper->port_priority | |
553 | || MAC_ADDRESS_COMPARE(&admin->system, &oper->system) | |
554 | || admin->system_priority != oper->system_priority | |
555 | || admin->key != oper->key | |
556 | || (admin->port_state & AD_STATE_AGGREGATION) | |
557 | != (oper->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
558 | // update the state machine Selected variable |
559 | port->sm_vars &= ~AD_PORT_SELECTED; | |
560 | } | |
561 | } | |
562 | } | |
563 | ||
564 | /** | |
565 | * __choose_matched - update a port's matched variable from a received lacpdu | |
566 | * @lacpdu: the lacpdu we've received | |
567 | * @port: the port we're looking at | |
568 | * | |
569 | * Update the value of the matched variable, using parameter values from a | |
570 | * newly received lacpdu. Parameter values for the partner carried in the | |
571 | * received PDU are compared with the corresponding operational parameter | |
572 | * values for the actor. Matched is set to TRUE if all of these parameters | |
573 | * match and the PDU parameter partner_state.aggregation has the same value as | |
574 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
575 | * in the aggregation. Matched is also set to TRUE if the value of | |
576 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
577 | * an individual link and lacp will actively maintain the link. Otherwise, | |
578 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
579 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
580 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
581 | * partner_state.lacp_activity variables are TRUE. | |
582 | */ | |
583 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
584 | { | |
585 | // validate lacpdu and port | |
586 | if (lacpdu && port) { | |
587 | // check if all parameters are alike | |
89cc76f9 JV |
588 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
589 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
1da177e4 | 590 | !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && |
89cc76f9 JV |
591 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
592 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
1da177e4 LT |
593 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || |
594 | // or this is individual link(aggregation == FALSE) | |
595 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) | |
596 | ) { | |
597 | // update the state machine Matched variable | |
598 | port->sm_vars |= AD_PORT_MATCHED; | |
599 | } else { | |
600 | port->sm_vars &= ~AD_PORT_MATCHED; | |
601 | } | |
602 | } | |
603 | } | |
604 | ||
605 | /** | |
606 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
607 | * @lacpdu: the lacpdu we've received | |
608 | * @port: the port we're looking at | |
609 | * | |
610 | * Updates the value of the ntt variable, using parameter values from a newly | |
611 | * received lacpdu. The parameter values for the partner carried in the | |
612 | * received PDU are compared with the corresponding operational parameter | |
613 | * values for the Actor. If one or more of the comparisons shows that the | |
614 | * value(s) received in the PDU differ from the current operational values, | |
615 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
616 | */ | |
617 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
618 | { | |
619 | // validate lacpdu and port | |
620 | if (lacpdu && port) { | |
621 | // check if any parameter is different | |
89cc76f9 JV |
622 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
623 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
1da177e4 | 624 | MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
625 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
626 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
627 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
628 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
629 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
630 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
631 | ) { | |
d238d458 HE |
632 | |
633 | port->ntt = true; | |
1da177e4 LT |
634 | } |
635 | } | |
636 | } | |
637 | ||
638 | /** | |
639 | * __attach_bond_to_agg | |
640 | * @port: the port we're looking at | |
641 | * | |
642 | * Handle the attaching of the port's control parser/multiplexer and the | |
643 | * aggregator. This function does nothing since the parser/multiplexer of the | |
644 | * receive and the parser/multiplexer of the aggregator are already combined. | |
645 | */ | |
646 | static void __attach_bond_to_agg(struct port *port) | |
647 | { | |
648 | port=NULL; // just to satisfy the compiler | |
649 | // This function does nothing since the parser/multiplexer of the receive | |
650 | // and the parser/multiplexer of the aggregator are already combined | |
651 | } | |
652 | ||
653 | /** | |
654 | * __detach_bond_from_agg | |
655 | * @port: the port we're looking at | |
656 | * | |
657 | * Handle the detaching of the port's control parser/multiplexer from the | |
658 | * aggregator. This function does nothing since the parser/multiplexer of the | |
659 | * receive and the parser/multiplexer of the aggregator are already combined. | |
660 | */ | |
661 | static void __detach_bond_from_agg(struct port *port) | |
662 | { | |
663 | port=NULL; // just to satisfy the compiler | |
664 | // This function does nothing sience the parser/multiplexer of the receive | |
665 | // and the parser/multiplexer of the aggregator are already combined | |
666 | } | |
667 | ||
668 | /** | |
669 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
670 | * @aggregator: the aggregator we're looking at | |
671 | * | |
672 | */ | |
673 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
674 | { | |
675 | struct port *port; | |
676 | int retval = 1; | |
677 | ||
678 | if (aggregator) { | |
679 | // scan all ports in this aggregator to verfy if they are all ready | |
680 | for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
681 | if (!(port->sm_vars & AD_PORT_READY_N)) { | |
682 | retval = 0; | |
683 | break; | |
684 | } | |
685 | } | |
686 | } | |
687 | ||
688 | return retval; | |
689 | } | |
690 | ||
691 | /** | |
692 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
693 | * @aggregator: the aggregator we're looking at | |
694 | * @val: Should the ports' ready bit be set on or off | |
695 | * | |
696 | */ | |
697 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
698 | { | |
699 | struct port *port; | |
700 | ||
701 | for (port=aggregator->lag_ports; port; port=port->next_port_in_aggregator) { | |
702 | if (val) { | |
703 | port->sm_vars |= AD_PORT_READY; | |
704 | } else { | |
705 | port->sm_vars &= ~AD_PORT_READY; | |
706 | } | |
707 | } | |
708 | } | |
709 | ||
710 | /** | |
711 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
712 | * @aggregator: the aggregator we're looking at | |
713 | * | |
714 | */ | |
715 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
716 | { | |
717 | u32 bandwidth=0; | |
718 | u32 basic_speed; | |
719 | ||
720 | if (aggregator->num_of_ports) { | |
721 | basic_speed = __get_link_speed(aggregator->lag_ports); | |
722 | switch (basic_speed) { | |
723 | case AD_LINK_SPEED_BITMASK_1MBPS: | |
724 | bandwidth = aggregator->num_of_ports; | |
725 | break; | |
726 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
727 | bandwidth = aggregator->num_of_ports * 10; | |
728 | break; | |
729 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
730 | bandwidth = aggregator->num_of_ports * 100; | |
731 | break; | |
732 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
733 | bandwidth = aggregator->num_of_ports * 1000; | |
734 | break; | |
94dbffd5 JV |
735 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
736 | bandwidth = aggregator->num_of_ports * 10000; | |
737 | break; | |
1da177e4 LT |
738 | default: |
739 | bandwidth=0; // to silent the compilor .... | |
740 | } | |
741 | } | |
742 | return bandwidth; | |
743 | } | |
744 | ||
745 | /** | |
746 | * __get_active_agg - get the current active aggregator | |
747 | * @aggregator: the aggregator we're looking at | |
748 | * | |
749 | */ | |
750 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
751 | { | |
752 | struct aggregator *retval = NULL; | |
753 | ||
754 | for (; aggregator; aggregator = __get_next_agg(aggregator)) { | |
755 | if (aggregator->is_active) { | |
756 | retval = aggregator; | |
757 | break; | |
758 | } | |
759 | } | |
760 | ||
761 | return retval; | |
762 | } | |
763 | ||
764 | /** | |
765 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
766 | * @port: the port we're looking at | |
767 | * | |
768 | */ | |
769 | static inline void __update_lacpdu_from_port(struct port *port) | |
770 | { | |
771 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 772 | const struct port_params *partner = &port->partner_oper; |
1da177e4 LT |
773 | |
774 | /* update current actual Actor parameters */ | |
775 | /* lacpdu->subtype initialized | |
776 | * lacpdu->version_number initialized | |
777 | * lacpdu->tlv_type_actor_info initialized | |
778 | * lacpdu->actor_information_length initialized | |
779 | */ | |
780 | ||
d3bb52b0 | 781 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 782 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
783 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
784 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
785 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
786 | lacpdu->actor_state = port->actor_oper_port_state; |
787 | ||
788 | /* lacpdu->reserved_3_1 initialized | |
789 | * lacpdu->tlv_type_partner_info initialized | |
790 | * lacpdu->partner_information_length initialized | |
791 | */ | |
792 | ||
3b5b35d0 HE |
793 | lacpdu->partner_system_priority = htons(partner->system_priority); |
794 | lacpdu->partner_system = partner->system; | |
795 | lacpdu->partner_key = htons(partner->key); | |
796 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
797 | lacpdu->partner_port = htons(partner->port_number); | |
798 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
799 | |
800 | /* lacpdu->reserved_3_2 initialized | |
801 | * lacpdu->tlv_type_collector_info initialized | |
802 | * lacpdu->collector_information_length initialized | |
803 | * collector_max_delay initialized | |
804 | * reserved_12[12] initialized | |
805 | * tlv_type_terminator initialized | |
806 | * terminator_length initialized | |
807 | * reserved_50[50] initialized | |
808 | */ | |
1da177e4 LT |
809 | } |
810 | ||
811 | ////////////////////////////////////////////////////////////////////////////////////// | |
812 | // ================= main 802.3ad protocol code ====================================== | |
813 | ////////////////////////////////////////////////////////////////////////////////////// | |
814 | ||
815 | /** | |
816 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
817 | * @port: the port we're looking at | |
818 | * | |
819 | * Returns: 0 on success | |
820 | * < 0 on error | |
821 | */ | |
822 | static int ad_lacpdu_send(struct port *port) | |
823 | { | |
824 | struct slave *slave = port->slave; | |
825 | struct sk_buff *skb; | |
826 | struct lacpdu_header *lacpdu_header; | |
827 | int length = sizeof(struct lacpdu_header); | |
828 | struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; | |
829 | ||
830 | skb = dev_alloc_skb(length); | |
831 | if (!skb) { | |
832 | return -ENOMEM; | |
833 | } | |
834 | ||
835 | skb->dev = slave->dev; | |
459a98ed | 836 | skb_reset_mac_header(skb); |
b0e380b1 | 837 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
838 | skb->protocol = PKT_TYPE_LACPDU; |
839 | skb->priority = TC_PRIO_CONTROL; | |
840 | ||
841 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
842 | ||
843 | lacpdu_header->ad_header.destination_address = lacpdu_multicast_address; | |
844 | /* Note: source addres is set to be the member's PERMANENT address, because we use it | |
845 | to identify loopback lacpdus in receive. */ | |
846 | lacpdu_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); | |
847 | lacpdu_header->ad_header.length_type = PKT_TYPE_LACPDU; | |
848 | ||
849 | lacpdu_header->lacpdu = port->lacpdu; // struct copy | |
850 | ||
851 | dev_queue_xmit(skb); | |
852 | ||
853 | return 0; | |
854 | } | |
855 | ||
856 | /** | |
857 | * ad_marker_send - send marker information/response on a given port | |
858 | * @port: the port we're looking at | |
859 | * @marker: marker data to send | |
860 | * | |
861 | * Returns: 0 on success | |
862 | * < 0 on error | |
863 | */ | |
1c3f0b8e | 864 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
865 | { |
866 | struct slave *slave = port->slave; | |
867 | struct sk_buff *skb; | |
1c3f0b8e MD |
868 | struct bond_marker_header *marker_header; |
869 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
870 | struct mac_addr lacpdu_multicast_address = AD_MULTICAST_LACPDU_ADDR; |
871 | ||
872 | skb = dev_alloc_skb(length + 16); | |
873 | if (!skb) { | |
874 | return -ENOMEM; | |
875 | } | |
876 | ||
877 | skb_reserve(skb, 16); | |
878 | ||
879 | skb->dev = slave->dev; | |
459a98ed | 880 | skb_reset_mac_header(skb); |
b0e380b1 | 881 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
882 | skb->protocol = PKT_TYPE_LACPDU; |
883 | ||
1c3f0b8e | 884 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 LT |
885 | |
886 | marker_header->ad_header.destination_address = lacpdu_multicast_address; | |
887 | /* Note: source addres is set to be the member's PERMANENT address, because we use it | |
888 | to identify loopback MARKERs in receive. */ | |
889 | marker_header->ad_header.source_address = *((struct mac_addr *)(slave->perm_hwaddr)); | |
890 | marker_header->ad_header.length_type = PKT_TYPE_LACPDU; | |
891 | ||
892 | marker_header->marker = *marker; // struct copy | |
893 | ||
894 | dev_queue_xmit(skb); | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | /** | |
900 | * ad_mux_machine - handle a port's mux state machine | |
901 | * @port: the port we're looking at | |
902 | * | |
903 | */ | |
904 | static void ad_mux_machine(struct port *port) | |
905 | { | |
906 | mux_states_t last_state; | |
907 | ||
908 | // keep current State Machine state to compare later if it was changed | |
909 | last_state = port->sm_mux_state; | |
910 | ||
911 | if (port->sm_vars & AD_PORT_BEGIN) { | |
912 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
913 | } else { | |
914 | switch (port->sm_mux_state) { | |
915 | case AD_MUX_DETACHED: | |
916 | if ((port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if SELECTED or STANDBY | |
917 | port->sm_mux_state = AD_MUX_WAITING; // next state | |
918 | } | |
919 | break; | |
920 | case AD_MUX_WAITING: | |
921 | // if SELECTED == FALSE return to DETACH state | |
922 | if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED | |
923 | port->sm_vars &= ~AD_PORT_READY_N; | |
924 | // in order to withhold the Selection Logic to check all ports READY_N value | |
925 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
926 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
927 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
928 | break; | |
929 | } | |
930 | ||
931 | // check if the wait_while_timer expired | |
932 | if (port->sm_mux_timer_counter && !(--port->sm_mux_timer_counter)) { | |
933 | port->sm_vars |= AD_PORT_READY_N; | |
934 | } | |
935 | ||
936 | // in order to withhold the selection logic to check all ports READY_N value | |
937 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
938 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
939 | ||
940 | // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state | |
941 | if ((port->sm_vars & AD_PORT_READY) && !port->sm_mux_timer_counter) { | |
942 | port->sm_mux_state = AD_MUX_ATTACHED; // next state | |
943 | } | |
944 | break; | |
945 | case AD_MUX_ATTACHED: | |
946 | // check also if agg_select_timer expired(so the edable port will take place only after this timer) | |
1055c9ab | 947 | if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { |
1da177e4 LT |
948 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state |
949 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY | |
950 | port->sm_vars &= ~AD_PORT_READY_N; | |
951 | // in order to withhold the selection logic to check all ports READY_N value | |
952 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
953 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
954 | port->sm_mux_state = AD_MUX_DETACHED;// next state | |
955 | } | |
956 | break; | |
957 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
958 | if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || | |
1055c9ab | 959 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) |
1da177e4 LT |
960 | ) { |
961 | port->sm_mux_state = AD_MUX_ATTACHED;// next state | |
962 | ||
963 | } else { | |
964 | // if port state hasn't changed make | |
965 | // sure that a collecting distributing | |
966 | // port in an active aggregator is enabled | |
967 | if (port->aggregator && | |
968 | port->aggregator->is_active && | |
969 | !__port_is_enabled(port)) { | |
970 | ||
971 | __enable_port(port); | |
972 | } | |
973 | } | |
974 | break; | |
975 | default: //to silence the compiler | |
976 | break; | |
977 | } | |
978 | } | |
979 | ||
980 | // check if the state machine was changed | |
981 | if (port->sm_mux_state != last_state) { | |
5a03cdb7 | 982 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_mux_state); |
1da177e4 LT |
983 | switch (port->sm_mux_state) { |
984 | case AD_MUX_DETACHED: | |
985 | __detach_bond_from_agg(port); | |
986 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
987 | ad_disable_collecting_distributing(port); | |
988 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
989 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 990 | port->ntt = true; |
1da177e4 LT |
991 | break; |
992 | case AD_MUX_WAITING: | |
993 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
994 | break; | |
995 | case AD_MUX_ATTACHED: | |
996 | __attach_bond_to_agg(port); | |
997 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
998 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
999 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
1000 | ad_disable_collecting_distributing(port); | |
d238d458 | 1001 | port->ntt = true; |
1da177e4 LT |
1002 | break; |
1003 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1004 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
1005 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
1006 | ad_enable_collecting_distributing(port); | |
d238d458 | 1007 | port->ntt = true; |
1da177e4 LT |
1008 | break; |
1009 | default: //to silence the compiler | |
1010 | break; | |
1011 | } | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | /** | |
1016 | * ad_rx_machine - handle a port's rx State Machine | |
1017 | * @lacpdu: the lacpdu we've received | |
1018 | * @port: the port we're looking at | |
1019 | * | |
1020 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
1021 | * CURRENT. If timer expired set the state machine in the proper state. | |
1022 | * In other cases, this function checks if we need to switch to other state. | |
1023 | */ | |
1024 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
1025 | { | |
1026 | rx_states_t last_state; | |
1027 | ||
1028 | // Lock to prevent 2 instances of this function to run simultaneously(rx interrupt and periodic machine callback) | |
1029 | __get_rx_machine_lock(port); | |
1030 | ||
1031 | // keep current State Machine state to compare later if it was changed | |
1032 | last_state = port->sm_rx_state; | |
1033 | ||
1034 | // check if state machine should change state | |
1035 | // first, check if port was reinitialized | |
1036 | if (port->sm_vars & AD_PORT_BEGIN) { | |
1037 | port->sm_rx_state = AD_RX_INITIALIZE; // next state | |
1038 | } | |
1039 | // check if port is not enabled | |
1040 | else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) { | |
1041 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1042 | } | |
1043 | // check if new lacpdu arrived | |
1044 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { | |
1045 | port->sm_rx_timer_counter = 0; // zero timer | |
1046 | port->sm_rx_state = AD_RX_CURRENT; | |
1047 | } else { | |
1048 | // if timer is on, and if it is expired | |
1049 | if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { | |
1050 | switch (port->sm_rx_state) { | |
1051 | case AD_RX_EXPIRED: | |
1052 | port->sm_rx_state = AD_RX_DEFAULTED; // next state | |
1053 | break; | |
1054 | case AD_RX_CURRENT: | |
1055 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1056 | break; | |
1057 | default: //to silence the compiler | |
1058 | break; | |
1059 | } | |
1060 | } else { | |
1061 | // if no lacpdu arrived and no timer is on | |
1062 | switch (port->sm_rx_state) { | |
1063 | case AD_RX_PORT_DISABLED: | |
1064 | if (port->sm_vars & AD_PORT_MOVED) { | |
1065 | port->sm_rx_state = AD_RX_INITIALIZE; // next state | |
1066 | } else if (port->is_enabled && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1067 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1068 | } else if (port->is_enabled && ((port->sm_vars & AD_PORT_LACP_ENABLED) == 0)) { | |
1069 | port->sm_rx_state = AD_RX_LACP_DISABLED; // next state | |
1070 | } | |
1071 | break; | |
1072 | default: //to silence the compiler | |
1073 | break; | |
1074 | ||
1075 | } | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | // check if the State machine was changed or new lacpdu arrived | |
1080 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
5a03cdb7 | 1081 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_rx_state); |
1da177e4 LT |
1082 | switch (port->sm_rx_state) { |
1083 | case AD_RX_INITIALIZE: | |
1084 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { | |
1085 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
1086 | } else { | |
1087 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
1088 | } | |
1089 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1090 | __record_default(port); | |
1091 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1092 | port->sm_vars &= ~AD_PORT_MOVED; | |
1093 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1094 | ||
1095 | /*- Fall Through -*/ | |
1096 | ||
1097 | case AD_RX_PORT_DISABLED: | |
1098 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1099 | break; | |
1100 | case AD_RX_LACP_DISABLED: | |
1101 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1102 | __record_default(port); | |
1055c9ab | 1103 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1104 | port->sm_vars |= AD_PORT_MATCHED; |
1105 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1106 | break; | |
1107 | case AD_RX_EXPIRED: | |
1108 | //Reset of the Synchronization flag. (Standard 43.4.12) | |
1109 | //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the | |
1110 | //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. | |
1055c9ab | 1111 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1112 | port->sm_vars &= ~AD_PORT_MATCHED; |
1055c9ab | 1113 | port->partner_oper.port_state |= AD_SHORT_TIMEOUT; |
1da177e4 LT |
1114 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1115 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1116 | break; | |
1117 | case AD_RX_DEFAULTED: | |
1118 | __update_default_selected(port); | |
1119 | __record_default(port); | |
1120 | port->sm_vars |= AD_PORT_MATCHED; | |
1121 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1122 | break; | |
1123 | case AD_RX_CURRENT: | |
1124 | // detect loopback situation | |
1125 | if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { | |
1126 | // INFO_RECEIVED_LOOPBACK_FRAMES | |
4e0952c7 MW |
1127 | printk(KERN_ERR DRV_NAME ": %s: An illegal loopback occurred on " |
1128 | "adapter (%s). Check the configuration to verify that all " | |
1129 | "Adapters are connected to 802.3ad compliant switch ports\n", | |
1130 | port->slave->dev->master->name, port->slave->dev->name); | |
1da177e4 LT |
1131 | __release_rx_machine_lock(port); |
1132 | return; | |
1133 | } | |
1134 | __update_selected(lacpdu, port); | |
1135 | __update_ntt(lacpdu, port); | |
1136 | __record_pdu(lacpdu, port); | |
1137 | __choose_matched(lacpdu, port); | |
1138 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); | |
1139 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1140 | // verify that if the aggregator is enabled, the port is enabled too. | |
1141 | //(because if the link goes down for a short time, the 802.3ad will not | |
1142 | // catch it, and the port will continue to be disabled) | |
1143 | if (port->aggregator && port->aggregator->is_active && !__port_is_enabled(port)) { | |
1144 | __enable_port(port); | |
1145 | } | |
1146 | break; | |
1147 | default: //to silence the compiler | |
1148 | break; | |
1149 | } | |
1150 | } | |
1151 | __release_rx_machine_lock(port); | |
1152 | } | |
1153 | ||
1154 | /** | |
1155 | * ad_tx_machine - handle a port's tx state machine | |
1156 | * @port: the port we're looking at | |
1157 | * | |
1158 | */ | |
1159 | static void ad_tx_machine(struct port *port) | |
1160 | { | |
1161 | // check if tx timer expired, to verify that we do not send more than 3 packets per second | |
1162 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1163 | // check if there is something to send | |
1164 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1165 | __update_lacpdu_from_port(port); | |
d238d458 | 1166 | |
1da177e4 | 1167 | if (ad_lacpdu_send(port) >= 0) { |
5a03cdb7 | 1168 | pr_debug("Sent LACPDU on port %d\n", port->actor_port_number); |
d238d458 HE |
1169 | |
1170 | /* mark ntt as false, so it will not be sent again until | |
1171 | demanded */ | |
1172 | port->ntt = false; | |
1da177e4 LT |
1173 | } |
1174 | } | |
1175 | // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND | |
1176 | port->sm_tx_timer_counter=ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | /** | |
1181 | * ad_periodic_machine - handle a port's periodic state machine | |
1182 | * @port: the port we're looking at | |
1183 | * | |
1184 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1185 | */ | |
1186 | static void ad_periodic_machine(struct port *port) | |
1187 | { | |
1188 | periodic_states_t last_state; | |
1189 | ||
1190 | // keep current state machine state to compare later if it was changed | |
1191 | last_state = port->sm_periodic_state; | |
1192 | ||
1193 | // check if port was reinitialized | |
1194 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || | |
1055c9ab | 1195 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 LT |
1196 | ) { |
1197 | port->sm_periodic_state = AD_NO_PERIODIC; // next state | |
1198 | } | |
1199 | // check if state machine should change state | |
1200 | else if (port->sm_periodic_timer_counter) { | |
1201 | // check if periodic state machine expired | |
1202 | if (!(--port->sm_periodic_timer_counter)) { | |
1203 | // if expired then do tx | |
1204 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1205 | } else { | |
1206 | // If not expired, check if there is some new timeout parameter from the partner state | |
1207 | switch (port->sm_periodic_state) { | |
1208 | case AD_FAST_PERIODIC: | |
1055c9ab | 1209 | if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 LT |
1210 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
1211 | } | |
1212 | break; | |
1213 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1214 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 LT |
1215 | // stop current timer |
1216 | port->sm_periodic_timer_counter = 0; | |
1217 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1218 | } | |
1219 | break; | |
1220 | default: //to silence the compiler | |
1221 | break; | |
1222 | } | |
1223 | } | |
1224 | } else { | |
1225 | switch (port->sm_periodic_state) { | |
1226 | case AD_NO_PERIODIC: | |
1227 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1228 | break; | |
1229 | case AD_PERIODIC_TX: | |
1055c9ab | 1230 | if (!(port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 LT |
1231 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
1232 | } else { | |
1233 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1234 | } | |
1235 | break; | |
1236 | default: //to silence the compiler | |
1237 | break; | |
1238 | } | |
1239 | } | |
1240 | ||
1241 | // check if the state machine was changed | |
1242 | if (port->sm_periodic_state != last_state) { | |
5a03cdb7 | 1243 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", port->actor_port_number, last_state, port->sm_periodic_state); |
1da177e4 LT |
1244 | switch (port->sm_periodic_state) { |
1245 | case AD_NO_PERIODIC: | |
1246 | port->sm_periodic_timer_counter = 0; // zero timer | |
1247 | break; | |
1248 | case AD_FAST_PERIODIC: | |
1249 | 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 | |
1250 | break; | |
1251 | case AD_SLOW_PERIODIC: | |
1252 | 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 | |
1253 | break; | |
1254 | case AD_PERIODIC_TX: | |
d238d458 | 1255 | port->ntt = true; |
1da177e4 LT |
1256 | break; |
1257 | default: //to silence the compiler | |
1258 | break; | |
1259 | } | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | /** | |
1264 | * ad_port_selection_logic - select aggregation groups | |
1265 | * @port: the port we're looking at | |
1266 | * | |
1267 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1268 | * selection logic is called in the inititalization (after all the handshkes), | |
1269 | * and after every lacpdu receive (if selected is off). | |
1270 | */ | |
1271 | static void ad_port_selection_logic(struct port *port) | |
1272 | { | |
1273 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1274 | struct port *last_port = NULL, *curr_port; | |
1275 | int found = 0; | |
1276 | ||
1277 | // if the port is already Selected, do nothing | |
1278 | if (port->sm_vars & AD_PORT_SELECTED) { | |
1279 | return; | |
1280 | } | |
1281 | ||
1282 | // if the port is connected to other aggregator, detach it | |
1283 | if (port->aggregator) { | |
1284 | // detach the port from its former aggregator | |
1285 | temp_aggregator=port->aggregator; | |
1286 | for (curr_port=temp_aggregator->lag_ports; curr_port; last_port=curr_port, curr_port=curr_port->next_port_in_aggregator) { | |
1287 | if (curr_port == port) { | |
1288 | temp_aggregator->num_of_ports--; | |
1289 | if (!last_port) {// if it is the first port attached to the aggregator | |
1290 | temp_aggregator->lag_ports=port->next_port_in_aggregator; | |
1291 | } else {// not the first port attached to the aggregator | |
1292 | last_port->next_port_in_aggregator=port->next_port_in_aggregator; | |
1293 | } | |
1294 | ||
1295 | // clear the port's relations to this aggregator | |
1296 | port->aggregator = NULL; | |
1297 | port->next_port_in_aggregator=NULL; | |
1298 | port->actor_port_aggregator_identifier=0; | |
1299 | ||
5a03cdb7 | 1300 | pr_debug("Port %d left LAG %d\n", port->actor_port_number, temp_aggregator->aggregator_identifier); |
1da177e4 LT |
1301 | // if the aggregator is empty, clear its parameters, and set it ready to be attached |
1302 | if (!temp_aggregator->lag_ports) { | |
1303 | ad_clear_agg(temp_aggregator); | |
1304 | } | |
1305 | break; | |
1306 | } | |
1307 | } | |
1308 | if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list | |
4e0952c7 | 1309 | printk(KERN_WARNING DRV_NAME ": %s: Warning: Port %d (on %s) was " |
1da177e4 | 1310 | "related to aggregator %d but was not on its port list\n", |
4e0952c7 | 1311 | port->slave->dev->master->name, |
1da177e4 LT |
1312 | port->actor_port_number, port->slave->dev->name, |
1313 | port->aggregator->aggregator_identifier); | |
1314 | } | |
1315 | } | |
1316 | // search on all aggregators for a suitable aggregator for this port | |
1317 | for (aggregator = __get_first_agg(port); aggregator; | |
1318 | aggregator = __get_next_agg(aggregator)) { | |
1319 | ||
1320 | // keep a free aggregator for later use(if needed) | |
1321 | if (!aggregator->lag_ports) { | |
1322 | if (!free_aggregator) { | |
1323 | free_aggregator=aggregator; | |
1324 | } | |
1325 | continue; | |
1326 | } | |
1327 | // check if current aggregator suits us | |
1328 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND | |
1055c9ab HE |
1329 | !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && |
1330 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && | |
1331 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1332 | ) && |
1055c9ab | 1333 | ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers |
1da177e4 LT |
1334 | !aggregator->is_individual) // but is not individual OR |
1335 | ) | |
1336 | ) { | |
1337 | // attach to the founded aggregator | |
1338 | port->aggregator = aggregator; | |
1339 | port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; | |
1340 | port->next_port_in_aggregator=aggregator->lag_ports; | |
1341 | port->aggregator->num_of_ports++; | |
1342 | aggregator->lag_ports=port; | |
5a03cdb7 | 1343 | pr_debug("Port %d joined LAG %d(existing LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); |
1da177e4 LT |
1344 | |
1345 | // mark this port as selected | |
1346 | port->sm_vars |= AD_PORT_SELECTED; | |
1347 | found = 1; | |
1348 | break; | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | // the port couldn't find an aggregator - attach it to a new aggregator | |
1353 | if (!found) { | |
1354 | if (free_aggregator) { | |
1355 | // assign port a new aggregator | |
1356 | port->aggregator = free_aggregator; | |
1357 | port->actor_port_aggregator_identifier=port->aggregator->aggregator_identifier; | |
1358 | ||
1359 | // update the new aggregator's parameters | |
1360 | // if port was responsed from the end-user | |
1361 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) {// if port is full duplex | |
1624db7b | 1362 | port->aggregator->is_individual = false; |
1da177e4 | 1363 | } else { |
1624db7b | 1364 | port->aggregator->is_individual = true; |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1368 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
1055c9ab HE |
1369 | port->aggregator->partner_system=port->partner_oper.system; |
1370 | port->aggregator->partner_system_priority = port->partner_oper.system_priority; | |
1371 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; | |
1da177e4 LT |
1372 | port->aggregator->receive_state = 1; |
1373 | port->aggregator->transmit_state = 1; | |
1374 | port->aggregator->lag_ports = port; | |
1375 | port->aggregator->num_of_ports++; | |
1376 | ||
1377 | // mark this port as selected | |
1378 | port->sm_vars |= AD_PORT_SELECTED; | |
1379 | ||
5a03cdb7 | 1380 | pr_debug("Port %d joined LAG %d(new LAG)\n", port->actor_port_number, port->aggregator->aggregator_identifier); |
1da177e4 | 1381 | } else { |
4e0952c7 MW |
1382 | printk(KERN_ERR DRV_NAME ": %s: Port %d (on %s) did not find a suitable aggregator\n", |
1383 | port->slave->dev->master->name, | |
1da177e4 LT |
1384 | port->actor_port_number, port->slave->dev->name); |
1385 | } | |
1386 | } | |
1387 | // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports | |
1388 | // else set ready=FALSE in all aggregator's ports | |
1389 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1390 | ||
fd989c83 JV |
1391 | aggregator = __get_first_agg(port); |
1392 | ad_agg_selection_logic(aggregator); | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Decide if "agg" is a better choice for the new active aggregator that | |
1397 | * the current best, according to the ad_select policy. | |
1398 | */ | |
1399 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1400 | struct aggregator *curr) | |
1401 | { | |
1402 | /* | |
1403 | * 0. If no best, select current. | |
1404 | * | |
1405 | * 1. If the current agg is not individual, and the best is | |
1406 | * individual, select current. | |
1407 | * | |
1408 | * 2. If current agg is individual and the best is not, keep best. | |
1409 | * | |
1410 | * 3. Therefore, current and best are both individual or both not | |
1411 | * individual, so: | |
1412 | * | |
1413 | * 3a. If current agg partner replied, and best agg partner did not, | |
1414 | * select current. | |
1415 | * | |
1416 | * 3b. If current agg partner did not reply and best agg partner | |
1417 | * did reply, keep best. | |
1418 | * | |
1419 | * 4. Therefore, current and best both have partner replies or | |
1420 | * both do not, so perform selection policy: | |
1421 | * | |
1422 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1423 | * select by bandwidth. | |
1424 | * | |
1425 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1426 | */ | |
1427 | if (!best) | |
1428 | return curr; | |
1429 | ||
1430 | if (!curr->is_individual && best->is_individual) | |
1431 | return curr; | |
1432 | ||
1433 | if (curr->is_individual && !best->is_individual) | |
1434 | return best; | |
1435 | ||
1436 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1437 | return curr; | |
1438 | ||
1439 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1440 | return best; | |
1441 | ||
1442 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1443 | case BOND_AD_COUNT: | |
1444 | if (curr->num_of_ports > best->num_of_ports) | |
1445 | return curr; | |
1446 | ||
1447 | if (curr->num_of_ports < best->num_of_ports) | |
1448 | return best; | |
1449 | ||
1450 | /*FALLTHROUGH*/ | |
1451 | case BOND_AD_STABLE: | |
1452 | case BOND_AD_BANDWIDTH: | |
1453 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1454 | return curr; | |
1455 | ||
1456 | break; | |
1457 | ||
1458 | default: | |
1459 | printk(KERN_WARNING DRV_NAME | |
1460 | ": %s: Impossible agg select mode %d\n", | |
1461 | curr->slave->dev->master->name, | |
1462 | __get_agg_selection_mode(curr->lag_ports)); | |
1463 | break; | |
1da177e4 | 1464 | } |
fd989c83 JV |
1465 | |
1466 | return best; | |
1da177e4 LT |
1467 | } |
1468 | ||
1469 | /** | |
1470 | * ad_agg_selection_logic - select an aggregation group for a team | |
1471 | * @aggregator: the aggregator we're looking at | |
1472 | * | |
1473 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1474 | * |
1475 | * The logic of this function is to select the aggregator according to | |
1476 | * the ad_select policy: | |
1477 | * | |
1478 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1479 | * it, and to reselect the active aggregator only if the previous | |
1480 | * aggregator has no more ports related to it. | |
1481 | * | |
1482 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1483 | * bandwidth, and reselect whenever a link state change takes place or the | |
1484 | * set of slaves in the bond changes. | |
1485 | * | |
1486 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1487 | * (slaves), and reselect whenever a link state change takes place or the | |
1488 | * set of slaves in the bond changes. | |
1da177e4 LT |
1489 | * |
1490 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1491 | * __get_active_agg() won't work correctly. This function should be better | |
1492 | * called with the bond itself, and retrieve the first agg from it. | |
1493 | */ | |
fd989c83 | 1494 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1495 | { |
fd989c83 | 1496 | struct aggregator *best, *active, *origin; |
1da177e4 | 1497 | struct port *port; |
1da177e4 | 1498 | |
fd989c83 | 1499 | origin = agg; |
1da177e4 | 1500 | |
fd989c83 JV |
1501 | active = __get_active_agg(agg); |
1502 | best = active; | |
1da177e4 | 1503 | |
1da177e4 | 1504 | do { |
fd989c83 JV |
1505 | agg->is_active = 0; |
1506 | ||
1507 | if (agg->num_of_ports) | |
1508 | best = ad_agg_selection_test(best, agg); | |
1509 | ||
1510 | } while ((agg = __get_next_agg(agg))); | |
1511 | ||
1512 | if (best && | |
1513 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
1514 | /* | |
1515 | * For the STABLE policy, don't replace the old active | |
1516 | * aggregator if it's still active (it has an answering | |
1517 | * partner) or if both the best and active don't have an | |
1518 | * answering partner. | |
1519 | */ | |
1520 | if (active && active->lag_ports && | |
1521 | active->lag_ports->is_enabled && | |
1522 | (__agg_has_partner(active) || | |
1523 | (!__agg_has_partner(active) && !__agg_has_partner(best)))) { | |
1524 | if (!(!active->actor_oper_aggregator_key && | |
1525 | best->actor_oper_aggregator_key)) { | |
1526 | best = NULL; | |
1527 | active->is_active = 1; | |
1da177e4 LT |
1528 | } |
1529 | } | |
fd989c83 | 1530 | } |
1da177e4 | 1531 | |
fd989c83 JV |
1532 | if (best && (best == active)) { |
1533 | best = NULL; | |
1534 | active->is_active = 1; | |
1da177e4 LT |
1535 | } |
1536 | ||
1537 | // if there is new best aggregator, activate it | |
fd989c83 | 1538 | if (best) { |
5a03cdb7 | 1539 | pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
fd989c83 JV |
1540 | best->aggregator_identifier, best->num_of_ports, |
1541 | best->actor_oper_aggregator_key, | |
1542 | best->partner_oper_aggregator_key, | |
1543 | best->is_individual, best->is_active); | |
5a03cdb7 | 1544 | pr_debug("best ports %p slave %p %s\n", |
fd989c83 JV |
1545 | best->lag_ports, best->slave, |
1546 | best->slave ? best->slave->dev->name : "NULL"); | |
1547 | ||
1548 | for (agg = __get_first_agg(best->lag_ports); agg; | |
1549 | agg = __get_next_agg(agg)) { | |
1550 | ||
5a03cdb7 | 1551 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
fd989c83 JV |
1552 | agg->aggregator_identifier, agg->num_of_ports, |
1553 | agg->actor_oper_aggregator_key, | |
1554 | agg->partner_oper_aggregator_key, | |
1555 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1556 | } |
1557 | ||
1558 | // check if any partner replys | |
fd989c83 JV |
1559 | if (best->is_individual) { |
1560 | printk(KERN_WARNING DRV_NAME ": %s: Warning: No 802.3ad" | |
1561 | " response from the link partner for any" | |
1562 | " adapters in the bond\n", | |
1563 | best->slave->dev->master->name); | |
1da177e4 LT |
1564 | } |
1565 | ||
fd989c83 | 1566 | best->is_active = 1; |
5a03cdb7 | 1567 | pr_debug("LAG %d chosen as the active LAG\n", |
fd989c83 | 1568 | best->aggregator_identifier); |
5a03cdb7 | 1569 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
fd989c83 JV |
1570 | best->aggregator_identifier, best->num_of_ports, |
1571 | best->actor_oper_aggregator_key, | |
1572 | best->partner_oper_aggregator_key, | |
1573 | best->is_individual, best->is_active); | |
1da177e4 LT |
1574 | |
1575 | // disable the ports that were related to the former active_aggregator | |
fd989c83 JV |
1576 | if (active) { |
1577 | for (port = active->lag_ports; port; | |
1578 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1579 | __disable_port(port); |
1580 | } | |
1581 | } | |
1582 | } | |
1583 | ||
fd989c83 JV |
1584 | /* |
1585 | * if the selected aggregator is of join individuals | |
1586 | * (partner_system is NULL), enable their ports | |
1587 | */ | |
1588 | active = __get_active_agg(origin); | |
1da177e4 | 1589 | |
fd989c83 JV |
1590 | if (active) { |
1591 | if (!__agg_has_partner(active)) { | |
1592 | for (port = active->lag_ports; port; | |
1593 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1594 | __enable_port(port); |
1595 | } | |
1596 | } | |
1597 | } | |
fd989c83 JV |
1598 | |
1599 | if (origin->slave) { | |
1600 | struct bonding *bond; | |
1601 | ||
1602 | bond = bond_get_bond_by_slave(origin->slave); | |
1603 | if (bond) | |
1604 | bond_3ad_set_carrier(bond); | |
1605 | } | |
1da177e4 LT |
1606 | } |
1607 | ||
1608 | /** | |
1609 | * ad_clear_agg - clear a given aggregator's parameters | |
1610 | * @aggregator: the aggregator we're looking at | |
1611 | * | |
1612 | */ | |
1613 | static void ad_clear_agg(struct aggregator *aggregator) | |
1614 | { | |
1615 | if (aggregator) { | |
1624db7b | 1616 | aggregator->is_individual = false; |
1da177e4 LT |
1617 | aggregator->actor_admin_aggregator_key = 0; |
1618 | aggregator->actor_oper_aggregator_key = 0; | |
1619 | aggregator->partner_system = null_mac_addr; | |
1620 | aggregator->partner_system_priority = 0; | |
1621 | aggregator->partner_oper_aggregator_key = 0; | |
1622 | aggregator->receive_state = 0; | |
1623 | aggregator->transmit_state = 0; | |
1624 | aggregator->lag_ports = NULL; | |
1625 | aggregator->is_active = 0; | |
1626 | aggregator->num_of_ports = 0; | |
5a03cdb7 | 1627 | pr_debug("LAG %d was cleared\n", aggregator->aggregator_identifier); |
1da177e4 LT |
1628 | } |
1629 | } | |
1630 | ||
1631 | /** | |
1632 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1633 | * @aggregator: the aggregator we're looking at | |
1634 | * | |
1635 | */ | |
1636 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1637 | { | |
1638 | if (aggregator) { | |
1639 | ad_clear_agg(aggregator); | |
1640 | ||
1641 | aggregator->aggregator_mac_address = null_mac_addr; | |
1642 | aggregator->aggregator_identifier = 0; | |
1643 | aggregator->slave = NULL; | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /** | |
1648 | * ad_initialize_port - initialize a given port's parameters | |
1649 | * @aggregator: the aggregator we're looking at | |
1650 | * @lacp_fast: boolean. whether fast periodic should be used | |
1651 | * | |
1652 | */ | |
1653 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1654 | { | |
c7e703d0 HE |
1655 | static const struct port_params tmpl = { |
1656 | .system_priority = 0xffff, | |
1657 | .key = 1, | |
1658 | .port_number = 1, | |
1659 | .port_priority = 0xff, | |
1660 | .port_state = 1, | |
1661 | }; | |
1662 | ||
1da177e4 LT |
1663 | if (port) { |
1664 | port->actor_port_number = 1; | |
1665 | port->actor_port_priority = 0xff; | |
1666 | port->actor_system = null_mac_addr; | |
1667 | port->actor_system_priority = 0xffff; | |
1668 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1669 | port->ntt = false; |
1da177e4 LT |
1670 | port->actor_admin_port_key = 1; |
1671 | port->actor_oper_port_key = 1; | |
1672 | port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1673 | port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1674 | ||
1675 | if (lacp_fast) { | |
1676 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
1677 | } | |
1678 | ||
c7e703d0 HE |
1679 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1680 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1681 | ||
f48127b6 | 1682 | port->is_enabled = true; |
1da177e4 LT |
1683 | // ****** private parameters ****** |
1684 | port->sm_vars = 0x3; | |
1685 | port->sm_rx_state = 0; | |
1686 | port->sm_rx_timer_counter = 0; | |
1687 | port->sm_periodic_state = 0; | |
1688 | port->sm_periodic_timer_counter = 0; | |
1689 | port->sm_mux_state = 0; | |
1690 | port->sm_mux_timer_counter = 0; | |
1691 | port->sm_tx_state = 0; | |
1692 | port->sm_tx_timer_counter = 0; | |
1693 | port->slave = NULL; | |
1694 | port->aggregator = NULL; | |
1695 | port->next_port_in_aggregator = NULL; | |
1696 | port->transaction_id = 0; | |
1697 | ||
1698 | ad_initialize_lacpdu(&(port->lacpdu)); | |
1699 | } | |
1700 | } | |
1701 | ||
1702 | /** | |
1703 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1704 | * @port: the port we're looking at | |
1705 | * | |
1706 | * Enable @port if it's in an active aggregator | |
1707 | */ | |
1708 | static void ad_enable_collecting_distributing(struct port *port) | |
1709 | { | |
1710 | if (port->aggregator->is_active) { | |
5a03cdb7 | 1711 | pr_debug("Enabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); |
1da177e4 LT |
1712 | __enable_port(port); |
1713 | } | |
1714 | } | |
1715 | ||
1716 | /** | |
1717 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1718 | * @port: the port we're looking at | |
1719 | * | |
1720 | */ | |
1721 | static void ad_disable_collecting_distributing(struct port *port) | |
1722 | { | |
1723 | if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { | |
5a03cdb7 | 1724 | pr_debug("Disabling port %d(LAG %d)\n", port->actor_port_number, port->aggregator->aggregator_identifier); |
1da177e4 LT |
1725 | __disable_port(port); |
1726 | } | |
1727 | } | |
1728 | ||
1729 | #if 0 | |
1730 | /** | |
1731 | * ad_marker_info_send - send a marker information frame | |
1732 | * @port: the port we're looking at | |
1733 | * | |
1734 | * This function does nothing since we decided not to implement send and handle | |
1735 | * response for marker PDU's, in this stage, but only to respond to marker | |
1736 | * information. | |
1737 | */ | |
1738 | static void ad_marker_info_send(struct port *port) | |
1739 | { | |
1c3f0b8e | 1740 | struct bond_marker marker; |
1da177e4 LT |
1741 | u16 index; |
1742 | ||
1743 | // fill the marker PDU with the appropriate values | |
1744 | marker.subtype = 0x02; | |
1745 | marker.version_number = 0x01; | |
1746 | marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; | |
1747 | marker.marker_length = 0x16; | |
1748 | // convert requester_port to Big Endian | |
1749 | marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); | |
1750 | marker.requester_system = port->actor_system; | |
1751 | // convert requester_port(u32) to Big Endian | |
1752 | marker.requester_transaction_id = (((++port->transaction_id & 0xFF) << 24) |((port->transaction_id & 0xFF00) << 8) |((port->transaction_id & 0xFF0000) >> 8) |((port->transaction_id & 0xFF000000) >> 24)); | |
1753 | marker.pad = 0; | |
1754 | marker.tlv_type_terminator = 0x00; | |
1755 | marker.terminator_length = 0x00; | |
1756 | for (index=0; index<90; index++) { | |
1757 | marker.reserved_90[index]=0; | |
1758 | } | |
1759 | ||
1760 | // send the marker information | |
1761 | if (ad_marker_send(port, &marker) >= 0) { | |
5a03cdb7 | 1762 | pr_debug("Sent Marker Information on port %d\n", port->actor_port_number); |
1da177e4 LT |
1763 | } |
1764 | } | |
1765 | #endif | |
1766 | ||
1767 | /** | |
1768 | * ad_marker_info_received - handle receive of a Marker information frame | |
1769 | * @marker_info: Marker info received | |
1770 | * @port: the port we're looking at | |
1771 | * | |
1772 | */ | |
1c3f0b8e MD |
1773 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1774 | struct port *port) | |
1da177e4 | 1775 | { |
1c3f0b8e | 1776 | struct bond_marker marker; |
1da177e4 LT |
1777 | |
1778 | // copy the received marker data to the response marker | |
1779 | //marker = *marker_info; | |
1c3f0b8e | 1780 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
1da177e4 LT |
1781 | // change the marker subtype to marker response |
1782 | marker.tlv_type=AD_MARKER_RESPONSE_SUBTYPE; | |
1783 | // send the marker response | |
1784 | ||
1785 | if (ad_marker_send(port, &marker) >= 0) { | |
5a03cdb7 | 1786 | pr_debug("Sent Marker Response on port %d\n", port->actor_port_number); |
1da177e4 LT |
1787 | } |
1788 | } | |
1789 | ||
1790 | /** | |
1791 | * ad_marker_response_received - handle receive of a marker response frame | |
1792 | * @marker: marker PDU received | |
1793 | * @port: the port we're looking at | |
1794 | * | |
1795 | * This function does nothing since we decided not to implement send and handle | |
1796 | * response for marker PDU's, in this stage, but only to respond to marker | |
1797 | * information. | |
1798 | */ | |
1c3f0b8e MD |
1799 | static void ad_marker_response_received(struct bond_marker *marker, |
1800 | struct port *port) | |
1da177e4 LT |
1801 | { |
1802 | marker=NULL; // just to satisfy the compiler | |
1803 | port=NULL; // just to satisfy the compiler | |
1804 | // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW | |
1805 | } | |
1806 | ||
1807 | /** | |
1808 | * ad_initialize_lacpdu - initialize a given lacpdu structure | |
1809 | * @lacpdu: lacpdu structure to initialize | |
1810 | * | |
1811 | */ | |
1812 | static void ad_initialize_lacpdu(struct lacpdu *lacpdu) | |
1813 | { | |
1814 | u16 index; | |
1815 | ||
1816 | // initialize lacpdu data | |
1817 | lacpdu->subtype = 0x01; | |
1818 | lacpdu->version_number = 0x01; | |
1819 | lacpdu->tlv_type_actor_info = 0x01; | |
1820 | lacpdu->actor_information_length = 0x14; | |
1821 | // lacpdu->actor_system_priority updated on send | |
1822 | // lacpdu->actor_system updated on send | |
1823 | // lacpdu->actor_key updated on send | |
1824 | // lacpdu->actor_port_priority updated on send | |
1825 | // lacpdu->actor_port updated on send | |
1826 | // lacpdu->actor_state updated on send | |
1827 | lacpdu->tlv_type_partner_info = 0x02; | |
1828 | lacpdu->partner_information_length = 0x14; | |
1829 | for (index=0; index<=2; index++) { | |
1830 | lacpdu->reserved_3_1[index]=0; | |
1831 | } | |
1832 | // lacpdu->partner_system_priority updated on send | |
1833 | // lacpdu->partner_system updated on send | |
1834 | // lacpdu->partner_key updated on send | |
1835 | // lacpdu->partner_port_priority updated on send | |
1836 | // lacpdu->partner_port updated on send | |
1837 | // lacpdu->partner_state updated on send | |
1838 | for (index=0; index<=2; index++) { | |
1839 | lacpdu->reserved_3_2[index]=0; | |
1840 | } | |
1841 | lacpdu->tlv_type_collector_info = 0x03; | |
1842 | lacpdu->collector_information_length= 0x10; | |
d3bb52b0 | 1843 | lacpdu->collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY); |
1da177e4 LT |
1844 | for (index=0; index<=11; index++) { |
1845 | lacpdu->reserved_12[index]=0; | |
1846 | } | |
1847 | lacpdu->tlv_type_terminator = 0x00; | |
1848 | lacpdu->terminator_length = 0; | |
1849 | for (index=0; index<=49; index++) { | |
1850 | lacpdu->reserved_50[index]=0; | |
1851 | } | |
1852 | } | |
1853 | ||
1854 | ////////////////////////////////////////////////////////////////////////////////////// | |
1855 | // ================= AD exported functions to the main bonding code ================== | |
1856 | ////////////////////////////////////////////////////////////////////////////////////// | |
1857 | ||
1858 | // Check aggregators status in team every T seconds | |
1859 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1860 | ||
fd989c83 JV |
1861 | /* |
1862 | * bond_3ad_initiate_agg_selection(struct bonding *bond) | |
1863 | * | |
1864 | * Set the aggregation selection timer, to initiate an agg selection in | |
1865 | * the very near future. Called during first initialization, and during | |
1866 | * any down to up transitions of the bond. | |
1867 | */ | |
1868 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1869 | { | |
1870 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
1871 | BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select; | |
1872 | } | |
1873 | ||
1da177e4 LT |
1874 | static u16 aggregator_identifier; |
1875 | ||
1876 | /** | |
1877 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1878 | * @bond: bonding struct to work on | |
1879 | * @tick_resolution: tick duration (millisecond resolution) | |
1880 | * @lacp_fast: boolean. whether fast periodic should be used | |
1881 | * | |
1882 | * Can be called only after the mac address of the bond is set. | |
1883 | */ | |
1884 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) | |
1885 | { | |
1886 | // check that the bond is not initialized yet | |
1887 | if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), &(bond->dev->dev_addr))) { | |
1888 | ||
1889 | aggregator_identifier = 0; | |
1890 | ||
1891 | BOND_AD_INFO(bond).lacp_fast = lacp_fast; | |
1892 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; | |
1893 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1894 | ||
1895 | // initialize how many times this module is called in one second(should be about every 100ms) | |
1896 | ad_ticks_per_sec = tick_resolution; | |
1897 | ||
fd989c83 JV |
1898 | bond_3ad_initiate_agg_selection(bond, |
1899 | AD_AGGREGATOR_SELECTION_TIMER * | |
1900 | ad_ticks_per_sec); | |
1da177e4 LT |
1901 | } |
1902 | } | |
1903 | ||
1904 | /** | |
1905 | * bond_3ad_bind_slave - initialize a slave's port | |
1906 | * @slave: slave struct to work on | |
1907 | * | |
1908 | * Returns: 0 on success | |
1909 | * < 0 on error | |
1910 | */ | |
1911 | int bond_3ad_bind_slave(struct slave *slave) | |
1912 | { | |
1913 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1914 | struct port *port; | |
1915 | struct aggregator *aggregator; | |
1916 | ||
1917 | if (bond == NULL) { | |
4e0952c7 MW |
1918 | printk(KERN_ERR DRV_NAME ": %s: The slave %s is not attached to its bond\n", |
1919 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
1920 | return -1; |
1921 | } | |
1922 | ||
1923 | //check that the slave has not been intialized yet. | |
1924 | if (SLAVE_AD_INFO(slave).port.slave != slave) { | |
1925 | ||
1926 | // port initialization | |
1927 | port = &(SLAVE_AD_INFO(slave).port); | |
1928 | ||
1929 | ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); | |
1930 | ||
1931 | port->slave = slave; | |
1932 | port->actor_port_number = SLAVE_AD_INFO(slave).id; | |
1933 | // key is determined according to the link speed, duplex and user key(which is yet not supported) | |
1934 | // ------------------------------------------------------------ | |
1935 | // Port key : | User key | Speed |Duplex| | |
1936 | // ------------------------------------------------------------ | |
1937 | // 16 6 1 0 | |
1938 | port->actor_admin_port_key = 0; // initialize this parameter | |
1939 | port->actor_admin_port_key |= __get_duplex(port); | |
1940 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1941 | port->actor_oper_port_key = port->actor_admin_port_key; | |
1942 | // if the port is not full duplex, then the port should be not lacp Enabled | |
1943 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) { | |
1944 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
1945 | } | |
1946 | // actor system is the bond's system | |
1947 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
1948 | // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) | |
1949 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1950 | port->aggregator = NULL; | |
1951 | port->next_port_in_aggregator = NULL; | |
1952 | ||
1953 | __disable_port(port); | |
1954 | __initialize_port_locks(port); | |
1955 | ||
1956 | ||
1957 | // aggregator initialization | |
1958 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1959 | ||
1960 | ad_initialize_agg(aggregator); | |
1961 | ||
1962 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
1963 | aggregator->aggregator_identifier = (++aggregator_identifier); | |
1964 | aggregator->slave = slave; | |
1965 | aggregator->is_active = 0; | |
1966 | aggregator->num_of_ports = 0; | |
1967 | } | |
1968 | ||
1969 | return 0; | |
1970 | } | |
1971 | ||
1972 | /** | |
1973 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1974 | * @slave: slave struct to work on | |
1975 | * | |
1976 | * Search for the aggregator that is related to this port, remove the | |
1977 | * aggregator and assign another aggregator for other port related to it | |
1978 | * (if any), and remove the port. | |
1979 | */ | |
1980 | void bond_3ad_unbind_slave(struct slave *slave) | |
1981 | { | |
1982 | struct port *port, *prev_port, *temp_port; | |
1983 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1984 | int select_new_active_agg = 0; | |
1985 | ||
1986 | // find the aggregator related to this slave | |
1987 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1988 | ||
1989 | // find the port related to this slave | |
1990 | port = &(SLAVE_AD_INFO(slave).port); | |
1991 | ||
1992 | // if slave is null, the whole port is not initialized | |
1993 | if (!port->slave) { | |
4e0952c7 MW |
1994 | printk(KERN_WARNING DRV_NAME ": Warning: %s: Trying to " |
1995 | "unbind an uninitialized port on %s\n", | |
1996 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
1997 | return; |
1998 | } | |
1999 | ||
5a03cdb7 | 2000 | pr_debug("Unbinding Link Aggregation Group %d\n", aggregator->aggregator_identifier); |
1da177e4 LT |
2001 | |
2002 | /* Tell the partner that this port is not suitable for aggregation */ | |
2003 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
2004 | __update_lacpdu_from_port(port); | |
2005 | ad_lacpdu_send(port); | |
2006 | ||
2007 | // check if this aggregator is occupied | |
2008 | if (aggregator->lag_ports) { | |
2009 | // check if there are other ports related to this aggregator except | |
2010 | // the port related to this slave(thats ensure us that there is a | |
2011 | // reason to search for new aggregator, and that we will find one | |
2012 | if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { | |
2013 | // find new aggregator for the related port(s) | |
2014 | new_aggregator = __get_first_agg(port); | |
2015 | for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { | |
2016 | // if the new aggregator is empty, or it connected to to our port only | |
2017 | if (!new_aggregator->lag_ports || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator)) { | |
2018 | break; | |
2019 | } | |
2020 | } | |
2021 | // if new aggregator found, copy the aggregator's parameters | |
2022 | // and connect the related lag_ports to the new aggregator | |
2023 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
5a03cdb7 | 2024 | pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", aggregator->aggregator_identifier, new_aggregator->aggregator_identifier); |
1da177e4 LT |
2025 | |
2026 | if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { | |
4e0952c7 MW |
2027 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2028 | aggregator->slave->dev->master->name); | |
1da177e4 LT |
2029 | // select new active aggregator |
2030 | select_new_active_agg = 1; | |
2031 | } | |
2032 | ||
2033 | new_aggregator->is_individual = aggregator->is_individual; | |
2034 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
2035 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
2036 | new_aggregator->partner_system = aggregator->partner_system; | |
2037 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
2038 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
2039 | new_aggregator->receive_state = aggregator->receive_state; | |
2040 | new_aggregator->transmit_state = aggregator->transmit_state; | |
2041 | new_aggregator->lag_ports = aggregator->lag_ports; | |
2042 | new_aggregator->is_active = aggregator->is_active; | |
2043 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
2044 | ||
2045 | // update the information that is written on the ports about the aggregator | |
2046 | for (temp_port=aggregator->lag_ports; temp_port; temp_port=temp_port->next_port_in_aggregator) { | |
2047 | temp_port->aggregator=new_aggregator; | |
2048 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; | |
2049 | } | |
2050 | ||
2051 | // clear the aggregator | |
2052 | ad_clear_agg(aggregator); | |
2053 | ||
2054 | if (select_new_active_agg) { | |
2055 | ad_agg_selection_logic(__get_first_agg(port)); | |
2056 | } | |
2057 | } else { | |
4e0952c7 MW |
2058 | printk(KERN_WARNING DRV_NAME ": %s: Warning: unbinding aggregator, " |
2059 | "and could not find a new aggregator for its ports\n", | |
2060 | slave->dev->master->name); | |
1da177e4 LT |
2061 | } |
2062 | } else { // in case that the only port related to this aggregator is the one we want to remove | |
2063 | select_new_active_agg = aggregator->is_active; | |
2064 | // clear the aggregator | |
2065 | ad_clear_agg(aggregator); | |
2066 | if (select_new_active_agg) { | |
4e0952c7 MW |
2067 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2068 | slave->dev->master->name); | |
1da177e4 LT |
2069 | // select new active aggregator |
2070 | ad_agg_selection_logic(__get_first_agg(port)); | |
2071 | } | |
2072 | } | |
2073 | } | |
2074 | ||
5a03cdb7 | 2075 | pr_debug("Unbinding port %d\n", port->actor_port_number); |
1da177e4 LT |
2076 | // find the aggregator that this port is connected to |
2077 | temp_aggregator = __get_first_agg(port); | |
2078 | for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { | |
2079 | prev_port = NULL; | |
2080 | // search the port in the aggregator's related ports | |
2081 | for (temp_port=temp_aggregator->lag_ports; temp_port; prev_port=temp_port, temp_port=temp_port->next_port_in_aggregator) { | |
2082 | if (temp_port == port) { // the aggregator found - detach the port from this aggregator | |
2083 | if (prev_port) { | |
2084 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; | |
2085 | } else { | |
2086 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; | |
2087 | } | |
2088 | temp_aggregator->num_of_ports--; | |
2089 | if (temp_aggregator->num_of_ports==0) { | |
2090 | select_new_active_agg = temp_aggregator->is_active; | |
2091 | // clear the aggregator | |
2092 | ad_clear_agg(temp_aggregator); | |
2093 | if (select_new_active_agg) { | |
4e0952c7 MW |
2094 | printk(KERN_INFO DRV_NAME ": %s: Removing an active aggregator\n", |
2095 | slave->dev->master->name); | |
1da177e4 LT |
2096 | // select new active aggregator |
2097 | ad_agg_selection_logic(__get_first_agg(port)); | |
2098 | } | |
2099 | } | |
2100 | break; | |
2101 | } | |
2102 | } | |
2103 | } | |
2104 | port->slave=NULL; | |
2105 | } | |
2106 | ||
2107 | /** | |
2108 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2109 | * @bond: bonding struct to work on | |
2110 | * | |
2111 | * The state machine handling concept in this module is to check every tick | |
2112 | * which state machine should operate any function. The execution order is | |
2113 | * round robin, so when we have an interaction between state machines, the | |
2114 | * reply of one to each other might be delayed until next tick. | |
2115 | * | |
2116 | * This function also complete the initialization when the agg_select_timer | |
2117 | * times out, and it selects an aggregator for the ports that are yet not | |
2118 | * related to any aggregator, and selects the active aggregator for a bond. | |
2119 | */ | |
1b76b316 | 2120 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2121 | { |
1b76b316 JV |
2122 | struct bonding *bond = container_of(work, struct bonding, |
2123 | ad_work.work); | |
1da177e4 LT |
2124 | struct port *port; |
2125 | struct aggregator *aggregator; | |
2126 | ||
2127 | read_lock(&bond->lock); | |
2128 | ||
2129 | if (bond->kill_timers) { | |
2130 | goto out; | |
2131 | } | |
2132 | ||
2133 | //check if there are any slaves | |
2134 | if (bond->slave_cnt == 0) { | |
2135 | goto re_arm; | |
2136 | } | |
2137 | ||
2138 | // check if agg_select_timer timer after initialize is timed out | |
2139 | if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
2140 | // select the active aggregator for the bond | |
2141 | if ((port = __get_first_port(bond))) { | |
2142 | if (!port->slave) { | |
4e0952c7 MW |
2143 | printk(KERN_WARNING DRV_NAME ": %s: Warning: bond's first port is " |
2144 | "uninitialized\n", bond->dev->name); | |
1da177e4 LT |
2145 | goto re_arm; |
2146 | } | |
2147 | ||
2148 | aggregator = __get_first_agg(port); | |
2149 | ad_agg_selection_logic(aggregator); | |
2150 | } | |
f0c76d61 | 2151 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2152 | } |
2153 | ||
2154 | // for each port run the state machines | |
2155 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2156 | if (!port->slave) { | |
4e0952c7 MW |
2157 | printk(KERN_WARNING DRV_NAME ": %s: Warning: Found an uninitialized " |
2158 | "port\n", bond->dev->name); | |
1da177e4 LT |
2159 | goto re_arm; |
2160 | } | |
2161 | ||
2162 | ad_rx_machine(NULL, port); | |
2163 | ad_periodic_machine(port); | |
2164 | ad_port_selection_logic(port); | |
2165 | ad_mux_machine(port); | |
2166 | ad_tx_machine(port); | |
2167 | ||
2168 | // turn off the BEGIN bit, since we already handled it | |
2169 | if (port->sm_vars & AD_PORT_BEGIN) { | |
2170 | port->sm_vars &= ~AD_PORT_BEGIN; | |
2171 | } | |
2172 | } | |
2173 | ||
2174 | re_arm: | |
1b76b316 | 2175 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2176 | out: |
2177 | read_unlock(&bond->lock); | |
2178 | } | |
2179 | ||
2180 | /** | |
2181 | * bond_3ad_rx_indication - handle a received frame | |
2182 | * @lacpdu: received lacpdu | |
2183 | * @slave: slave struct to work on | |
2184 | * @length: length of the data received | |
2185 | * | |
2186 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2187 | * received frames (loopback). Since only the payload is given to this | |
2188 | * function, it check for loopback. | |
2189 | */ | |
2190 | static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) | |
2191 | { | |
2192 | struct port *port; | |
2193 | ||
2194 | if (length >= sizeof(struct lacpdu)) { | |
2195 | ||
2196 | port = &(SLAVE_AD_INFO(slave).port); | |
2197 | ||
2198 | if (!port->slave) { | |
4e0952c7 MW |
2199 | printk(KERN_WARNING DRV_NAME ": %s: Warning: port of slave %s is " |
2200 | "uninitialized\n", slave->dev->name, slave->dev->master->name); | |
1da177e4 LT |
2201 | return; |
2202 | } | |
2203 | ||
2204 | switch (lacpdu->subtype) { | |
2205 | case AD_TYPE_LACPDU: | |
5a03cdb7 | 2206 | pr_debug("Received LACPDU on port %d\n", port->actor_port_number); |
1da177e4 LT |
2207 | ad_rx_machine(lacpdu, port); |
2208 | break; | |
2209 | ||
2210 | case AD_TYPE_MARKER: | |
2211 | // No need to convert fields to Little Endian since we don't use the marker's fields. | |
2212 | ||
1c3f0b8e | 2213 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2214 | case AD_MARKER_INFORMATION_SUBTYPE: |
5a03cdb7 | 2215 | pr_debug("Received Marker Information on port %d\n", port->actor_port_number); |
1c3f0b8e | 2216 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2217 | break; |
2218 | ||
2219 | case AD_MARKER_RESPONSE_SUBTYPE: | |
5a03cdb7 | 2220 | pr_debug("Received Marker Response on port %d\n", port->actor_port_number); |
1c3f0b8e | 2221 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2222 | break; |
2223 | ||
2224 | default: | |
5a03cdb7 | 2225 | pr_debug("Received an unknown Marker subtype on slot %d\n", port->actor_port_number); |
1da177e4 LT |
2226 | } |
2227 | } | |
2228 | } | |
2229 | } | |
2230 | ||
2231 | /** | |
2232 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2233 | * @slave: slave struct to work on | |
2234 | * | |
2235 | * Handle reselection of aggregator (if needed) for this port. | |
2236 | */ | |
2237 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2238 | { | |
2239 | struct port *port; | |
2240 | ||
2241 | port = &(SLAVE_AD_INFO(slave).port); | |
2242 | ||
2243 | // if slave is null, the whole port is not initialized | |
2244 | if (!port->slave) { | |
4e0952c7 MW |
2245 | printk(KERN_WARNING DRV_NAME ": Warning: %s: speed " |
2246 | "changed for uninitialized port on %s\n", | |
2247 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2248 | return; |
2249 | } | |
2250 | ||
2251 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
2252 | port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
5a03cdb7 | 2253 | pr_debug("Port %d changed speed\n", port->actor_port_number); |
1da177e4 LT |
2254 | // there is no need to reselect a new aggregator, just signal the |
2255 | // state machines to reinitialize | |
2256 | port->sm_vars |= AD_PORT_BEGIN; | |
2257 | } | |
2258 | ||
2259 | /** | |
2260 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2261 | * @slave: slave struct to work on | |
2262 | * | |
2263 | * Handle reselection of aggregator (if needed) for this port. | |
2264 | */ | |
2265 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2266 | { | |
2267 | struct port *port; | |
2268 | ||
2269 | port=&(SLAVE_AD_INFO(slave).port); | |
2270 | ||
2271 | // if slave is null, the whole port is not initialized | |
2272 | if (!port->slave) { | |
4e0952c7 MW |
2273 | printk(KERN_WARNING DRV_NAME ": %s: Warning: duplex changed " |
2274 | "for uninitialized port on %s\n", | |
2275 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2276 | return; |
2277 | } | |
2278 | ||
2279 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
2280 | port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); | |
5a03cdb7 | 2281 | pr_debug("Port %d changed duplex\n", port->actor_port_number); |
1da177e4 LT |
2282 | // there is no need to reselect a new aggregator, just signal the |
2283 | // state machines to reinitialize | |
2284 | port->sm_vars |= AD_PORT_BEGIN; | |
2285 | } | |
2286 | ||
2287 | /** | |
2288 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2289 | * @slave: slave struct to work on | |
2290 | * @status: whether the link is now up or down | |
2291 | * | |
2292 | * Handle reselection of aggregator (if needed) for this port. | |
2293 | */ | |
2294 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2295 | { | |
2296 | struct port *port; | |
2297 | ||
2298 | port = &(SLAVE_AD_INFO(slave).port); | |
2299 | ||
2300 | // if slave is null, the whole port is not initialized | |
2301 | if (!port->slave) { | |
4e0952c7 MW |
2302 | printk(KERN_WARNING DRV_NAME ": Warning: %s: link status changed for " |
2303 | "uninitialized port on %s\n", | |
2304 | slave->dev->master->name, slave->dev->name); | |
1da177e4 LT |
2305 | return; |
2306 | } | |
2307 | ||
2308 | // 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) | |
2309 | // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report | |
2310 | if (link == BOND_LINK_UP) { | |
f48127b6 | 2311 | port->is_enabled = true; |
1da177e4 LT |
2312 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
2313 | port->actor_oper_port_key=port->actor_admin_port_key |= __get_duplex(port); | |
2314 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
2315 | port->actor_oper_port_key=port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
2316 | } else { | |
2317 | /* link has failed */ | |
f48127b6 | 2318 | port->is_enabled = false; |
1da177e4 LT |
2319 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
2320 | port->actor_oper_port_key= (port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS); | |
2321 | } | |
2322 | //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); | |
2323 | // there is no need to reselect a new aggregator, just signal the | |
2324 | // state machines to reinitialize | |
2325 | port->sm_vars |= AD_PORT_BEGIN; | |
2326 | } | |
2327 | ||
ff59c456 | 2328 | /* |
031ae4de | 2329 | * set link state for bonding master: if we have an active |
ff59c456 JV |
2330 | * aggregator, we're up, if not, we're down. Presumes that we cannot |
2331 | * have an active aggregator if there are no slaves with link up. | |
2332 | * | |
031ae4de JV |
2333 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2334 | * | |
ff59c456 JV |
2335 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2336 | * change, nonzero if it does. | |
2337 | */ | |
2338 | int bond_3ad_set_carrier(struct bonding *bond) | |
2339 | { | |
031ae4de | 2340 | if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) { |
ff59c456 JV |
2341 | if (!netif_carrier_ok(bond->dev)) { |
2342 | netif_carrier_on(bond->dev); | |
2343 | return 1; | |
2344 | } | |
2345 | return 0; | |
2346 | } | |
2347 | ||
2348 | if (netif_carrier_ok(bond->dev)) { | |
2349 | netif_carrier_off(bond->dev); | |
2350 | return 1; | |
2351 | } | |
2352 | return 0; | |
2353 | } | |
2354 | ||
1da177e4 LT |
2355 | /** |
2356 | * bond_3ad_get_active_agg_info - get information of the active aggregator | |
2357 | * @bond: bonding struct to work on | |
2358 | * @ad_info: ad_info struct to fill with the bond's info | |
2359 | * | |
2360 | * Returns: 0 on success | |
2361 | * < 0 on error | |
2362 | */ | |
2363 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2364 | { | |
2365 | struct aggregator *aggregator = NULL; | |
2366 | struct port *port; | |
2367 | ||
2368 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2369 | if (port->aggregator && port->aggregator->is_active) { | |
2370 | aggregator = port->aggregator; | |
2371 | break; | |
2372 | } | |
2373 | } | |
2374 | ||
2375 | if (aggregator) { | |
2376 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2377 | ad_info->ports = aggregator->num_of_ports; | |
2378 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2379 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2380 | memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); | |
2381 | return 0; | |
2382 | } | |
2383 | ||
2384 | return -1; | |
2385 | } | |
2386 | ||
2387 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) | |
2388 | { | |
2389 | struct slave *slave, *start_at; | |
454d7c9b | 2390 | struct bonding *bond = netdev_priv(dev); |
1da177e4 LT |
2391 | int slave_agg_no; |
2392 | int slaves_in_agg; | |
2393 | int agg_id; | |
2394 | int i; | |
2395 | struct ad_info ad_info; | |
2396 | int res = 1; | |
2397 | ||
2398 | /* make sure that the slaves list will | |
2399 | * not change during tx | |
2400 | */ | |
2401 | read_lock(&bond->lock); | |
2402 | ||
2403 | if (!BOND_IS_OK(bond)) { | |
2404 | goto out; | |
2405 | } | |
2406 | ||
2407 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
4e0952c7 MW |
2408 | printk(KERN_DEBUG DRV_NAME ": %s: Error: " |
2409 | "bond_3ad_get_active_agg_info failed\n", dev->name); | |
1da177e4 LT |
2410 | goto out; |
2411 | } | |
2412 | ||
2413 | slaves_in_agg = ad_info.ports; | |
2414 | agg_id = ad_info.aggregator_id; | |
2415 | ||
2416 | if (slaves_in_agg == 0) { | |
2417 | /*the aggregator is empty*/ | |
4e0952c7 MW |
2418 | printk(KERN_DEBUG DRV_NAME ": %s: Error: active " |
2419 | "aggregator is empty\n", | |
2420 | dev->name); | |
1da177e4 LT |
2421 | goto out; |
2422 | } | |
2423 | ||
169a3e66 | 2424 | slave_agg_no = bond->xmit_hash_policy(skb, dev, slaves_in_agg); |
1da177e4 LT |
2425 | |
2426 | bond_for_each_slave(bond, slave, i) { | |
2427 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2428 | ||
2429 | if (agg && (agg->aggregator_identifier == agg_id)) { | |
2430 | slave_agg_no--; | |
2431 | if (slave_agg_no < 0) { | |
2432 | break; | |
2433 | } | |
2434 | } | |
2435 | } | |
2436 | ||
2437 | if (slave_agg_no >= 0) { | |
4e0952c7 MW |
2438 | printk(KERN_ERR DRV_NAME ": %s: Error: Couldn't find a slave to tx on " |
2439 | "for aggregator ID %d\n", dev->name, agg_id); | |
1da177e4 LT |
2440 | goto out; |
2441 | } | |
2442 | ||
2443 | start_at = slave; | |
2444 | ||
2445 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
2446 | int slave_agg_id = 0; | |
2447 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2448 | ||
2449 | if (agg) { | |
2450 | slave_agg_id = agg->aggregator_identifier; | |
2451 | } | |
2452 | ||
2453 | if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { | |
2454 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
2455 | break; | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | out: | |
2460 | if (res) { | |
2461 | /* no suitable interface, frame not sent */ | |
2462 | dev_kfree_skb(skb); | |
2463 | } | |
2464 | read_unlock(&bond->lock); | |
2465 | return 0; | |
2466 | } | |
2467 | ||
f2ccd8fa | 2468 | int bond_3ad_lacpdu_recv(struct sk_buff *skb, struct net_device *dev, struct packet_type* ptype, struct net_device *orig_dev) |
1da177e4 | 2469 | { |
454d7c9b | 2470 | struct bonding *bond = netdev_priv(dev); |
1da177e4 LT |
2471 | struct slave *slave = NULL; |
2472 | int ret = NET_RX_DROP; | |
2473 | ||
c346dca1 | 2474 | if (dev_net(dev) != &init_net) |
e730c155 EB |
2475 | goto out; |
2476 | ||
f2ccd8fa | 2477 | if (!(dev->flags & IFF_MASTER)) |
1da177e4 | 2478 | goto out; |
1da177e4 LT |
2479 | |
2480 | read_lock(&bond->lock); | |
454d7c9b WC |
2481 | slave = bond_get_slave_by_dev((struct bonding *)netdev_priv(dev), |
2482 | orig_dev); | |
f2ccd8fa | 2483 | if (!slave) |
1da177e4 | 2484 | goto out_unlock; |
1da177e4 LT |
2485 | |
2486 | bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); | |
2487 | ||
2488 | ret = NET_RX_SUCCESS; | |
2489 | ||
2490 | out_unlock: | |
2491 | read_unlock(&bond->lock); | |
2492 | out: | |
2493 | dev_kfree_skb(skb); | |
2494 | ||
2495 | return ret; | |
2496 | } | |
2497 |