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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 | ||
a4aee5c8 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
1da177e4 LT |
25 | #include <linux/skbuff.h> |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/ethtool.h> | |
fd989c83 | 30 | #include <linux/etherdevice.h> |
1da177e4 LT |
31 | #include <linux/if_bonding.h> |
32 | #include <linux/pkt_sched.h> | |
e730c155 | 33 | #include <net/net_namespace.h> |
1da177e4 LT |
34 | #include "bonding.h" |
35 | #include "bond_3ad.h" | |
36 | ||
37 | // General definitions | |
38 | #define AD_SHORT_TIMEOUT 1 | |
39 | #define AD_LONG_TIMEOUT 0 | |
40 | #define AD_STANDBY 0x2 | |
41 | #define AD_MAX_TX_IN_SECOND 3 | |
42 | #define AD_COLLECTOR_MAX_DELAY 0 | |
43 | ||
44 | // Timer definitions(43.4.4 in the 802.3ad standard) | |
45 | #define AD_FAST_PERIODIC_TIME 1 | |
46 | #define AD_SLOW_PERIODIC_TIME 30 | |
47 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
48 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
49 | #define AD_CHURN_DETECTION_TIME 60 | |
50 | #define AD_AGGREGATE_WAIT_TIME 2 | |
51 | ||
52 | // Port state definitions(43.4.2.2 in the 802.3ad standard) | |
53 | #define AD_STATE_LACP_ACTIVITY 0x1 | |
54 | #define AD_STATE_LACP_TIMEOUT 0x2 | |
55 | #define AD_STATE_AGGREGATION 0x4 | |
56 | #define AD_STATE_SYNCHRONIZATION 0x8 | |
57 | #define AD_STATE_COLLECTING 0x10 | |
58 | #define AD_STATE_DISTRIBUTING 0x20 | |
59 | #define AD_STATE_DEFAULTED 0x40 | |
60 | #define AD_STATE_EXPIRED 0x80 | |
61 | ||
62 | // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) | |
63 | #define AD_PORT_BEGIN 0x1 | |
64 | #define AD_PORT_LACP_ENABLED 0x2 | |
65 | #define AD_PORT_ACTOR_CHURN 0x4 | |
66 | #define AD_PORT_PARTNER_CHURN 0x8 | |
67 | #define AD_PORT_READY 0x10 | |
68 | #define AD_PORT_READY_N 0x20 | |
69 | #define AD_PORT_MATCHED 0x40 | |
70 | #define AD_PORT_STANDBY 0x80 | |
71 | #define AD_PORT_SELECTED 0x100 | |
72 | #define AD_PORT_MOVED 0x200 | |
73 | ||
74 | // Port Key definitions | |
75 | // key is determined according to the link speed, duplex and | |
76 | // user key(which is yet not supported) | |
77 | // ------------------------------------------------------------ | |
78 | // Port key : | User key | Speed |Duplex| | |
79 | // ------------------------------------------------------------ | |
80 | // 16 6 1 0 | |
81 | #define AD_DUPLEX_KEY_BITS 0x1 | |
82 | #define AD_SPEED_KEY_BITS 0x3E | |
83 | #define AD_USER_KEY_BITS 0xFFC0 | |
84 | ||
85 | //dalloun | |
86 | #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 | |
87 | #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 | |
88 | #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 | |
89 | #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 | |
94dbffd5 | 90 | #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 |
1da177e4 LT |
91 | //endalloun |
92 | ||
93 | // compare MAC addresses | |
94 | #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) | |
95 | ||
128ea6c3 | 96 | static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; |
1da177e4 LT |
97 | static u16 ad_ticks_per_sec; |
98 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
99 | ||
e4ac4320 HE |
100 | static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
101 | ||
1da177e4 LT |
102 | // ================= main 802.3ad protocol functions ================== |
103 | static int ad_lacpdu_send(struct port *port); | |
1c3f0b8e | 104 | static int ad_marker_send(struct port *port, struct bond_marker *marker); |
1da177e4 LT |
105 | static void ad_mux_machine(struct port *port); |
106 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); | |
107 | static void ad_tx_machine(struct port *port); | |
108 | static void ad_periodic_machine(struct port *port); | |
109 | static void ad_port_selection_logic(struct port *port); | |
110 | static void ad_agg_selection_logic(struct aggregator *aggregator); | |
111 | static void ad_clear_agg(struct aggregator *aggregator); | |
112 | static void ad_initialize_agg(struct aggregator *aggregator); | |
113 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
1da177e4 LT |
114 | static void ad_enable_collecting_distributing(struct port *port); |
115 | static void ad_disable_collecting_distributing(struct port *port); | |
1c3f0b8e MD |
116 | static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); |
117 | static void ad_marker_response_received(struct bond_marker *marker, struct port *port); | |
1da177e4 LT |
118 | |
119 | ||
120 | ///////////////////////////////////////////////////////////////////////////////// | |
121 | // ================= api to bonding and kernel code ================== | |
122 | ///////////////////////////////////////////////////////////////////////////////// | |
123 | ||
124 | /** | |
125 | * __get_bond_by_port - get the port's bonding struct | |
126 | * @port: the port we're looking at | |
127 | * | |
128 | * Return @port's bonding struct, or %NULL if it can't be found. | |
129 | */ | |
130 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
131 | { | |
7bfc4753 | 132 | if (port->slave == NULL) |
1da177e4 | 133 | return NULL; |
1da177e4 LT |
134 | |
135 | return bond_get_bond_by_slave(port->slave); | |
136 | } | |
137 | ||
138 | /** | |
139 | * __get_first_port - get the first port in the bond | |
140 | * @bond: the bond we're looking at | |
141 | * | |
142 | * Return the port of the first slave in @bond, or %NULL if it can't be found. | |
143 | */ | |
144 | static inline struct port *__get_first_port(struct bonding *bond) | |
145 | { | |
7bfc4753 | 146 | if (bond->slave_cnt == 0) |
1da177e4 | 147 | return NULL; |
1da177e4 LT |
148 | |
149 | return &(SLAVE_AD_INFO(bond->first_slave).port); | |
150 | } | |
151 | ||
152 | /** | |
153 | * __get_next_port - get the next port in the bond | |
154 | * @port: the port we're looking at | |
155 | * | |
156 | * Return the port of the slave that is next in line of @port's slave in the | |
157 | * bond, or %NULL if it can't be found. | |
158 | */ | |
159 | static inline struct port *__get_next_port(struct port *port) | |
160 | { | |
161 | struct bonding *bond = __get_bond_by_port(port); | |
162 | struct slave *slave = port->slave; | |
163 | ||
164 | // If there's no bond for this port, or this is the last slave | |
7bfc4753 | 165 | if ((bond == NULL) || (slave->next == bond->first_slave)) |
1da177e4 | 166 | return NULL; |
1da177e4 LT |
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 | |
7bfc4753 | 183 | if ((bond == NULL) || (bond->slave_cnt == 0)) |
1da177e4 | 184 | return NULL; |
1da177e4 LT |
185 | |
186 | return &(SLAVE_AD_INFO(bond->first_slave).aggregator); | |
187 | } | |
188 | ||
189 | /** | |
190 | * __get_next_agg - get the next aggregator in the bond | |
191 | * @aggregator: the aggregator we're looking at | |
192 | * | |
193 | * Return the aggregator of the slave that is next in line of @aggregator's | |
194 | * slave in the bond, or %NULL if it can't be found. | |
195 | */ | |
196 | static inline struct aggregator *__get_next_agg(struct aggregator *aggregator) | |
197 | { | |
198 | struct slave *slave = aggregator->slave; | |
199 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
200 | ||
201 | // If there's no bond for this aggregator, or this is the last slave | |
7bfc4753 | 202 | if ((bond == NULL) || (slave->next == bond->first_slave)) |
1da177e4 | 203 | return NULL; |
1da177e4 LT |
204 | |
205 | return &(SLAVE_AD_INFO(slave->next).aggregator); | |
206 | } | |
207 | ||
fd989c83 JV |
208 | /* |
209 | * __agg_has_partner | |
210 | * | |
211 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
212 | * address for the partner). Return 0 if not. | |
213 | */ | |
214 | static inline int __agg_has_partner(struct aggregator *agg) | |
215 | { | |
216 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
217 | } | |
218 | ||
1da177e4 LT |
219 | /** |
220 | * __disable_port - disable the port's slave | |
221 | * @port: the port we're looking at | |
222 | * | |
223 | */ | |
224 | static inline void __disable_port(struct port *port) | |
225 | { | |
226 | bond_set_slave_inactive_flags(port->slave); | |
227 | } | |
228 | ||
229 | /** | |
230 | * __enable_port - enable the port's slave, if it's up | |
231 | * @port: the port we're looking at | |
232 | * | |
233 | */ | |
234 | static inline void __enable_port(struct port *port) | |
235 | { | |
236 | struct slave *slave = port->slave; | |
237 | ||
7bfc4753 | 238 | if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) |
1da177e4 | 239 | bond_set_slave_active_flags(slave); |
1da177e4 LT |
240 | } |
241 | ||
242 | /** | |
243 | * __port_is_enabled - check if the port's slave is in active state | |
244 | * @port: the port we're looking at | |
245 | * | |
246 | */ | |
247 | static inline int __port_is_enabled(struct port *port) | |
248 | { | |
e30bc066 | 249 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
250 | } |
251 | ||
252 | /** | |
253 | * __get_agg_selection_mode - get the aggregator selection mode | |
254 | * @port: the port we're looking at | |
255 | * | |
fd989c83 | 256 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
257 | */ |
258 | static inline u32 __get_agg_selection_mode(struct port *port) | |
259 | { | |
260 | struct bonding *bond = __get_bond_by_port(port); | |
261 | ||
7bfc4753 | 262 | if (bond == NULL) |
fd989c83 | 263 | return BOND_AD_STABLE; |
1da177e4 LT |
264 | |
265 | return BOND_AD_INFO(bond).agg_select_mode; | |
266 | } | |
267 | ||
268 | /** | |
269 | * __check_agg_selection_timer - check if the selection timer has expired | |
270 | * @port: the port we're looking at | |
271 | * | |
272 | */ | |
273 | static inline int __check_agg_selection_timer(struct port *port) | |
274 | { | |
275 | struct bonding *bond = __get_bond_by_port(port); | |
276 | ||
7bfc4753 | 277 | if (bond == NULL) |
1da177e4 | 278 | return 0; |
1da177e4 LT |
279 | |
280 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
281 | } | |
282 | ||
283 | /** | |
9ac3524a | 284 | * __get_state_machine_lock - lock the port's state machines |
1da177e4 LT |
285 | * @port: the port we're looking at |
286 | * | |
287 | */ | |
9ac3524a | 288 | static inline void __get_state_machine_lock(struct port *port) |
1da177e4 | 289 | { |
9ac3524a | 290 | spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
291 | } |
292 | ||
293 | /** | |
9ac3524a | 294 | * __release_state_machine_lock - unlock the port's state machines |
1da177e4 LT |
295 | * @port: the port we're looking at |
296 | * | |
297 | */ | |
9ac3524a | 298 | static inline void __release_state_machine_lock(struct port *port) |
1da177e4 | 299 | { |
9ac3524a | 300 | spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
301 | } |
302 | ||
303 | /** | |
304 | * __get_link_speed - get a port's speed | |
305 | * @port: the port we're looking at | |
306 | * | |
307 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
308 | * 0, | |
309 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
310 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
311 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
312 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
313 | */ |
314 | static u16 __get_link_speed(struct port *port) | |
315 | { | |
316 | struct slave *slave = port->slave; | |
317 | u16 speed; | |
318 | ||
319 | /* this if covers only a special case: when the configuration starts with | |
320 | * link down, it sets the speed to 0. | |
321 | * This is done in spite of the fact that the e100 driver reports 0 to be | |
322 | * compatible with MVT in the future.*/ | |
7bfc4753 | 323 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 324 | speed = 0; |
7bfc4753 | 325 | else { |
1da177e4 LT |
326 | switch (slave->speed) { |
327 | case SPEED_10: | |
328 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
329 | break; | |
330 | ||
331 | case SPEED_100: | |
332 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
333 | break; | |
334 | ||
335 | case SPEED_1000: | |
336 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
337 | break; | |
338 | ||
94dbffd5 JV |
339 | case SPEED_10000: |
340 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
341 | break; | |
342 | ||
1da177e4 LT |
343 | default: |
344 | speed = 0; // unknown speed value from ethtool. shouldn't happen | |
345 | break; | |
346 | } | |
347 | } | |
348 | ||
a4aee5c8 JP |
349 | pr_debug("Port %d Received link speed %d update from adapter\n", |
350 | port->actor_port_number, speed); | |
1da177e4 LT |
351 | return speed; |
352 | } | |
353 | ||
354 | /** | |
355 | * __get_duplex - get a port's duplex | |
356 | * @port: the port we're looking at | |
357 | * | |
358 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
359 | * 0x01 if in full duplex | |
360 | * 0x00 otherwise | |
361 | */ | |
362 | static u8 __get_duplex(struct port *port) | |
363 | { | |
364 | struct slave *slave = port->slave; | |
365 | ||
366 | u8 retval; | |
367 | ||
368 | // handling a special case: when the configuration starts with | |
369 | // link down, it sets the duplex to 0. | |
7bfc4753 | 370 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 371 | retval = 0x0; |
7bfc4753 | 372 | else { |
1da177e4 LT |
373 | switch (slave->duplex) { |
374 | case DUPLEX_FULL: | |
128ea6c3 | 375 | retval = 0x1; |
a4aee5c8 JP |
376 | pr_debug("Port %d Received status full duplex update from adapter\n", |
377 | port->actor_port_number); | |
1da177e4 LT |
378 | break; |
379 | case DUPLEX_HALF: | |
380 | default: | |
128ea6c3 | 381 | retval = 0x0; |
a4aee5c8 JP |
382 | pr_debug("Port %d Received status NOT full duplex update from adapter\n", |
383 | port->actor_port_number); | |
1da177e4 LT |
384 | break; |
385 | } | |
386 | } | |
387 | return retval; | |
388 | } | |
389 | ||
390 | /** | |
9ac3524a | 391 | * __initialize_port_locks - initialize a port's STATE machine spinlock |
1da177e4 LT |
392 | * @port: the port we're looking at |
393 | * | |
394 | */ | |
395 | static inline void __initialize_port_locks(struct port *port) | |
396 | { | |
397 | // make sure it isn't called twice | |
9ac3524a | 398 | spin_lock_init(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
399 | } |
400 | ||
401 | //conversions | |
1da177e4 LT |
402 | |
403 | /** | |
404 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
405 | * @timer_type: which timer to operate | |
406 | * @par: timer parameter. see below | |
407 | * | |
408 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
409 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
410 | * %SLOW_PERIODIC_TIME. | |
411 | */ | |
412 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
413 | { | |
128ea6c3 | 414 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
415 | |
416 | switch (timer_type) { | |
417 | case AD_CURRENT_WHILE_TIMER: // for rx machine usage | |
7bfc4753 | 418 | if (par) |
1da177e4 | 419 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout |
7bfc4753 | 420 | else |
1da177e4 | 421 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout |
1da177e4 LT |
422 | break; |
423 | case AD_ACTOR_CHURN_TIMER: // for local churn machine | |
424 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
425 | break; | |
426 | case AD_PERIODIC_TIMER: // for periodic machine | |
427 | retval = (par*ad_ticks_per_sec); // long timeout | |
428 | break; | |
429 | case AD_PARTNER_CHURN_TIMER: // for remote churn machine | |
430 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
431 | break; | |
432 | case AD_WAIT_WHILE_TIMER: // for selection machine | |
433 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
434 | break; | |
435 | } | |
436 | return retval; | |
437 | } | |
438 | ||
439 | ||
440 | ///////////////////////////////////////////////////////////////////////////////// | |
441 | // ================= ad_rx_machine helper functions ================== | |
442 | ///////////////////////////////////////////////////////////////////////////////// | |
443 | ||
2d6682db JV |
444 | /** |
445 | * __choose_matched - update a port's matched variable from a received lacpdu | |
446 | * @lacpdu: the lacpdu we've received | |
447 | * @port: the port we're looking at | |
448 | * | |
449 | * Update the value of the matched variable, using parameter values from a | |
450 | * newly received lacpdu. Parameter values for the partner carried in the | |
451 | * received PDU are compared with the corresponding operational parameter | |
452 | * values for the actor. Matched is set to TRUE if all of these parameters | |
453 | * match and the PDU parameter partner_state.aggregation has the same value as | |
454 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
455 | * in the aggregation. Matched is also set to TRUE if the value of | |
456 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
457 | * an individual link and lacp will actively maintain the link. Otherwise, | |
458 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
459 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
460 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
461 | * partner_state.lacp_activity variables are TRUE. | |
462 | * | |
463 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
464 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
465 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
466 | */ | |
467 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
468 | { | |
469 | // check if all parameters are alike | |
470 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && | |
471 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
472 | !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && | |
473 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && | |
474 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
475 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
476 | // or this is individual link(aggregation == FALSE) | |
477 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) | |
478 | ) { | |
479 | // update the state machine Matched variable | |
480 | port->sm_vars |= AD_PORT_MATCHED; | |
481 | } else { | |
482 | port->sm_vars &= ~AD_PORT_MATCHED; | |
483 | } | |
484 | } | |
485 | ||
1da177e4 LT |
486 | /** |
487 | * __record_pdu - record parameters from a received lacpdu | |
488 | * @lacpdu: the lacpdu we've received | |
489 | * @port: the port we're looking at | |
490 | * | |
491 | * Record the parameter values for the Actor carried in a received lacpdu as | |
492 | * the current partner operational parameter values and sets | |
493 | * actor_oper_port_state.defaulted to FALSE. | |
494 | */ | |
495 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
496 | { | |
1da177e4 | 497 | if (lacpdu && port) { |
b99d6ba9 HE |
498 | struct port_params *partner = &port->partner_oper; |
499 | ||
2d6682db | 500 | __choose_matched(lacpdu, port); |
1da177e4 | 501 | // record the new parameter values for the partner operational |
b99d6ba9 HE |
502 | partner->port_number = ntohs(lacpdu->actor_port); |
503 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
504 | partner->system = lacpdu->actor_system; | |
505 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
506 | partner->key = ntohs(lacpdu->actor_key); | |
507 | partner->port_state = lacpdu->actor_state; | |
1da177e4 LT |
508 | |
509 | // set actor_oper_port_state.defaulted to FALSE | |
510 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; | |
511 | ||
512 | // set the partner sync. to on if the partner is sync. and the port is matched | |
7bfc4753 BD |
513 | if ((port->sm_vars & AD_PORT_MATCHED) |
514 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 515 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 516 | else |
b99d6ba9 | 517 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
518 | } |
519 | } | |
520 | ||
521 | /** | |
522 | * __record_default - record default parameters | |
523 | * @port: the port we're looking at | |
524 | * | |
525 | * This function records the default parameter values for the partner carried | |
526 | * in the Partner Admin parameters as the current partner operational parameter | |
527 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
528 | */ | |
529 | static void __record_default(struct port *port) | |
530 | { | |
1da177e4 LT |
531 | if (port) { |
532 | // record the partner admin parameters | |
5eefd1ad HE |
533 | memcpy(&port->partner_oper, &port->partner_admin, |
534 | sizeof(struct port_params)); | |
1da177e4 LT |
535 | |
536 | // set actor_oper_port_state.defaulted to true | |
537 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; | |
538 | } | |
539 | } | |
540 | ||
541 | /** | |
542 | * __update_selected - update a port's Selected variable from a received lacpdu | |
543 | * @lacpdu: the lacpdu we've received | |
544 | * @port: the port we're looking at | |
545 | * | |
546 | * Update the value of the selected variable, using parameter values from a | |
547 | * newly received lacpdu. The parameter values for the Actor carried in the | |
548 | * received PDU are compared with the corresponding operational parameter | |
549 | * values for the ports partner. If one or more of the comparisons shows that | |
550 | * the value(s) received in the PDU differ from the current operational values, | |
551 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
552 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
553 | */ | |
554 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
555 | { | |
1da177e4 | 556 | if (lacpdu && port) { |
ce6a49ad HE |
557 | const struct port_params *partner = &port->partner_oper; |
558 | ||
1da177e4 | 559 | // check if any parameter is different |
8e95a202 JP |
560 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
561 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
562 | MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) || | |
563 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || | |
564 | ntohs(lacpdu->actor_key) != partner->key || | |
565 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
566 | // update the state machine Selected variable |
567 | port->sm_vars &= ~AD_PORT_SELECTED; | |
568 | } | |
569 | } | |
570 | } | |
571 | ||
572 | /** | |
573 | * __update_default_selected - update a port's Selected variable from Partner | |
574 | * @port: the port we're looking at | |
575 | * | |
576 | * This function updates the value of the selected variable, using the partner | |
577 | * administrative parameter values. The administrative values are compared with | |
578 | * the corresponding operational parameter values for the partner. If one or | |
579 | * more of the comparisons shows that the administrative value(s) differ from | |
580 | * the current operational values, then Selected is set to FALSE and | |
581 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
582 | * Selected remains unchanged. | |
583 | */ | |
584 | static void __update_default_selected(struct port *port) | |
585 | { | |
1da177e4 | 586 | if (port) { |
3c52065f HE |
587 | const struct port_params *admin = &port->partner_admin; |
588 | const struct port_params *oper = &port->partner_oper; | |
589 | ||
1da177e4 | 590 | // check if any parameter is different |
8e95a202 JP |
591 | if (admin->port_number != oper->port_number || |
592 | admin->port_priority != oper->port_priority || | |
593 | MAC_ADDRESS_COMPARE(&admin->system, &oper->system) || | |
594 | admin->system_priority != oper->system_priority || | |
595 | admin->key != oper->key || | |
596 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 597 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
598 | // update the state machine Selected variable |
599 | port->sm_vars &= ~AD_PORT_SELECTED; | |
600 | } | |
601 | } | |
602 | } | |
603 | ||
1da177e4 LT |
604 | /** |
605 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
606 | * @lacpdu: the lacpdu we've received | |
607 | * @port: the port we're looking at | |
608 | * | |
609 | * Updates the value of the ntt variable, using parameter values from a newly | |
610 | * received lacpdu. The parameter values for the partner carried in the | |
611 | * received PDU are compared with the corresponding operational parameter | |
612 | * values for the Actor. If one or more of the comparisons shows that the | |
613 | * value(s) received in the PDU differ from the current operational values, | |
614 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
615 | */ | |
616 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
617 | { | |
618 | // validate lacpdu and port | |
619 | if (lacpdu && port) { | |
620 | // check if any parameter is different | |
89cc76f9 JV |
621 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
622 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
1da177e4 | 623 | MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
624 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
625 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
626 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
627 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
628 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
629 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
630 | ) { | |
d238d458 HE |
631 | |
632 | port->ntt = true; | |
1da177e4 LT |
633 | } |
634 | } | |
635 | } | |
636 | ||
637 | /** | |
638 | * __attach_bond_to_agg | |
639 | * @port: the port we're looking at | |
640 | * | |
641 | * Handle the attaching of the port's control parser/multiplexer and the | |
642 | * aggregator. This function does nothing since the parser/multiplexer of the | |
643 | * receive and the parser/multiplexer of the aggregator are already combined. | |
644 | */ | |
645 | static void __attach_bond_to_agg(struct port *port) | |
646 | { | |
128ea6c3 | 647 | port = NULL; /* just to satisfy the compiler */ |
1da177e4 LT |
648 | // This function does nothing since the parser/multiplexer of the receive |
649 | // and the parser/multiplexer of the aggregator are already combined | |
650 | } | |
651 | ||
652 | /** | |
653 | * __detach_bond_from_agg | |
654 | * @port: the port we're looking at | |
655 | * | |
656 | * Handle the detaching of the port's control parser/multiplexer from the | |
657 | * aggregator. This function does nothing since the parser/multiplexer of the | |
658 | * receive and the parser/multiplexer of the aggregator are already combined. | |
659 | */ | |
660 | static void __detach_bond_from_agg(struct port *port) | |
661 | { | |
128ea6c3 | 662 | port = NULL; /* just to satisfy the compiler */ |
1da177e4 LT |
663 | // This function does nothing sience the parser/multiplexer of the receive |
664 | // and the parser/multiplexer of the aggregator are already combined | |
665 | } | |
666 | ||
667 | /** | |
668 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
669 | * @aggregator: the aggregator we're looking at | |
670 | * | |
671 | */ | |
672 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
673 | { | |
674 | struct port *port; | |
675 | int retval = 1; | |
676 | ||
677 | if (aggregator) { | |
678 | // scan all ports in this aggregator to verfy if they are all ready | |
128ea6c3 BD |
679 | for (port = aggregator->lag_ports; |
680 | port; | |
681 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
682 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
683 | retval = 0; | |
684 | break; | |
685 | } | |
686 | } | |
687 | } | |
688 | ||
689 | return retval; | |
690 | } | |
691 | ||
692 | /** | |
693 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
694 | * @aggregator: the aggregator we're looking at | |
695 | * @val: Should the ports' ready bit be set on or off | |
696 | * | |
697 | */ | |
698 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
699 | { | |
700 | struct port *port; | |
701 | ||
128ea6c3 BD |
702 | for (port = aggregator->lag_ports; port; |
703 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 704 | if (val) |
1da177e4 | 705 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 706 | else |
1da177e4 | 707 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
708 | } |
709 | } | |
710 | ||
711 | /** | |
712 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
713 | * @aggregator: the aggregator we're looking at | |
714 | * | |
715 | */ | |
716 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
717 | { | |
128ea6c3 | 718 | u32 bandwidth = 0; |
1da177e4 LT |
719 | |
720 | if (aggregator->num_of_ports) { | |
65cce19c | 721 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
722 | case AD_LINK_SPEED_BITMASK_1MBPS: |
723 | bandwidth = aggregator->num_of_ports; | |
724 | break; | |
725 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
726 | bandwidth = aggregator->num_of_ports * 10; | |
727 | break; | |
728 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
729 | bandwidth = aggregator->num_of_ports * 100; | |
730 | break; | |
731 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
732 | bandwidth = aggregator->num_of_ports * 1000; | |
733 | break; | |
94dbffd5 JV |
734 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
735 | bandwidth = aggregator->num_of_ports * 10000; | |
736 | break; | |
1da177e4 | 737 | default: |
128ea6c3 | 738 | bandwidth = 0; /*to silence the compiler ....*/ |
1da177e4 LT |
739 | } |
740 | } | |
741 | return bandwidth; | |
742 | } | |
743 | ||
744 | /** | |
745 | * __get_active_agg - get the current active aggregator | |
746 | * @aggregator: the aggregator we're looking at | |
747 | * | |
748 | */ | |
749 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
750 | { | |
751 | struct aggregator *retval = NULL; | |
752 | ||
753 | for (; aggregator; aggregator = __get_next_agg(aggregator)) { | |
754 | if (aggregator->is_active) { | |
755 | retval = aggregator; | |
756 | break; | |
757 | } | |
758 | } | |
759 | ||
760 | return retval; | |
761 | } | |
762 | ||
763 | /** | |
764 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
765 | * @port: the port we're looking at | |
766 | * | |
767 | */ | |
768 | static inline void __update_lacpdu_from_port(struct port *port) | |
769 | { | |
770 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 771 | const struct port_params *partner = &port->partner_oper; |
1da177e4 LT |
772 | |
773 | /* update current actual Actor parameters */ | |
774 | /* lacpdu->subtype initialized | |
775 | * lacpdu->version_number initialized | |
776 | * lacpdu->tlv_type_actor_info initialized | |
777 | * lacpdu->actor_information_length initialized | |
778 | */ | |
779 | ||
d3bb52b0 | 780 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 781 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
782 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
783 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
784 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
785 | lacpdu->actor_state = port->actor_oper_port_state; |
786 | ||
787 | /* lacpdu->reserved_3_1 initialized | |
788 | * lacpdu->tlv_type_partner_info initialized | |
789 | * lacpdu->partner_information_length initialized | |
790 | */ | |
791 | ||
3b5b35d0 HE |
792 | lacpdu->partner_system_priority = htons(partner->system_priority); |
793 | lacpdu->partner_system = partner->system; | |
794 | lacpdu->partner_key = htons(partner->key); | |
795 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
796 | lacpdu->partner_port = htons(partner->port_number); | |
797 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
798 | |
799 | /* lacpdu->reserved_3_2 initialized | |
800 | * lacpdu->tlv_type_collector_info initialized | |
801 | * lacpdu->collector_information_length initialized | |
802 | * collector_max_delay initialized | |
803 | * reserved_12[12] initialized | |
804 | * tlv_type_terminator initialized | |
805 | * terminator_length initialized | |
806 | * reserved_50[50] initialized | |
807 | */ | |
1da177e4 LT |
808 | } |
809 | ||
810 | ////////////////////////////////////////////////////////////////////////////////////// | |
811 | // ================= main 802.3ad protocol code ====================================== | |
812 | ////////////////////////////////////////////////////////////////////////////////////// | |
813 | ||
814 | /** | |
815 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
816 | * @port: the port we're looking at | |
817 | * | |
818 | * Returns: 0 on success | |
819 | * < 0 on error | |
820 | */ | |
821 | static int ad_lacpdu_send(struct port *port) | |
822 | { | |
823 | struct slave *slave = port->slave; | |
824 | struct sk_buff *skb; | |
825 | struct lacpdu_header *lacpdu_header; | |
826 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
827 | |
828 | skb = dev_alloc_skb(length); | |
7bfc4753 | 829 | if (!skb) |
1da177e4 | 830 | return -ENOMEM; |
1da177e4 LT |
831 | |
832 | skb->dev = slave->dev; | |
459a98ed | 833 | skb_reset_mac_header(skb); |
b0e380b1 | 834 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
835 | skb->protocol = PKT_TYPE_LACPDU; |
836 | skb->priority = TC_PRIO_CONTROL; | |
837 | ||
838 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
839 | ||
e727149e | 840 | memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 841 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 842 | because we use it to identify loopback lacpdus in receive. */ |
e727149e HE |
843 | memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
844 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
845 | |
846 | lacpdu_header->lacpdu = port->lacpdu; // struct copy | |
847 | ||
848 | dev_queue_xmit(skb); | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | /** | |
854 | * ad_marker_send - send marker information/response on a given port | |
855 | * @port: the port we're looking at | |
856 | * @marker: marker data to send | |
857 | * | |
858 | * Returns: 0 on success | |
859 | * < 0 on error | |
860 | */ | |
1c3f0b8e | 861 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
862 | { |
863 | struct slave *slave = port->slave; | |
864 | struct sk_buff *skb; | |
1c3f0b8e MD |
865 | struct bond_marker_header *marker_header; |
866 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
867 | |
868 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 869 | if (!skb) |
1da177e4 | 870 | return -ENOMEM; |
1da177e4 LT |
871 | |
872 | skb_reserve(skb, 16); | |
873 | ||
874 | skb->dev = slave->dev; | |
459a98ed | 875 | skb_reset_mac_header(skb); |
b0e380b1 | 876 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
877 | skb->protocol = PKT_TYPE_LACPDU; |
878 | ||
1c3f0b8e | 879 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 880 | |
e727149e | 881 | memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 882 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 883 | because we use it to identify loopback MARKERs in receive. */ |
e727149e HE |
884 | memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
885 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
886 | |
887 | marker_header->marker = *marker; // struct copy | |
888 | ||
889 | dev_queue_xmit(skb); | |
890 | ||
891 | return 0; | |
892 | } | |
893 | ||
894 | /** | |
895 | * ad_mux_machine - handle a port's mux state machine | |
896 | * @port: the port we're looking at | |
897 | * | |
898 | */ | |
899 | static void ad_mux_machine(struct port *port) | |
900 | { | |
901 | mux_states_t last_state; | |
902 | ||
903 | // keep current State Machine state to compare later if it was changed | |
904 | last_state = port->sm_mux_state; | |
905 | ||
906 | if (port->sm_vars & AD_PORT_BEGIN) { | |
907 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
908 | } else { | |
909 | switch (port->sm_mux_state) { | |
910 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
911 | if ((port->sm_vars & AD_PORT_SELECTED) |
912 | || (port->sm_vars & AD_PORT_STANDBY)) | |
913 | /* if SELECTED or STANDBY */ | |
1da177e4 | 914 | port->sm_mux_state = AD_MUX_WAITING; // next state |
1da177e4 LT |
915 | break; |
916 | case AD_MUX_WAITING: | |
917 | // if SELECTED == FALSE return to DETACH state | |
918 | if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED | |
919 | port->sm_vars &= ~AD_PORT_READY_N; | |
920 | // in order to withhold the Selection Logic to check all ports READY_N value | |
921 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
922 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
923 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
924 | break; | |
925 | } | |
926 | ||
927 | // check if the wait_while_timer expired | |
7bfc4753 BD |
928 | if (port->sm_mux_timer_counter |
929 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 930 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 LT |
931 | |
932 | // in order to withhold the selection logic to check all ports READY_N value | |
933 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
934 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
935 | ||
936 | // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state | |
7bfc4753 BD |
937 | if ((port->sm_vars & AD_PORT_READY) |
938 | && !port->sm_mux_timer_counter) | |
1da177e4 | 939 | port->sm_mux_state = AD_MUX_ATTACHED; // next state |
1da177e4 LT |
940 | break; |
941 | case AD_MUX_ATTACHED: | |
942 | // check also if agg_select_timer expired(so the edable port will take place only after this timer) | |
1055c9ab | 943 | if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { |
1da177e4 LT |
944 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state |
945 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY | |
946 | port->sm_vars &= ~AD_PORT_READY_N; | |
947 | // in order to withhold the selection logic to check all ports READY_N value | |
948 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
949 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
950 | port->sm_mux_state = AD_MUX_DETACHED;// next state | |
951 | } | |
952 | break; | |
953 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
954 | if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || | |
1055c9ab | 955 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) |
1da177e4 LT |
956 | ) { |
957 | port->sm_mux_state = AD_MUX_ATTACHED;// next state | |
958 | ||
959 | } else { | |
960 | // if port state hasn't changed make | |
961 | // sure that a collecting distributing | |
962 | // port in an active aggregator is enabled | |
963 | if (port->aggregator && | |
964 | port->aggregator->is_active && | |
965 | !__port_is_enabled(port)) { | |
966 | ||
967 | __enable_port(port); | |
968 | } | |
969 | } | |
970 | break; | |
971 | default: //to silence the compiler | |
972 | break; | |
973 | } | |
974 | } | |
975 | ||
976 | // check if the state machine was changed | |
977 | if (port->sm_mux_state != last_state) { | |
a4aee5c8 JP |
978 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
979 | port->actor_port_number, last_state, | |
980 | port->sm_mux_state); | |
1da177e4 LT |
981 | switch (port->sm_mux_state) { |
982 | case AD_MUX_DETACHED: | |
983 | __detach_bond_from_agg(port); | |
984 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
985 | ad_disable_collecting_distributing(port); | |
986 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
987 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 988 | port->ntt = true; |
1da177e4 LT |
989 | break; |
990 | case AD_MUX_WAITING: | |
991 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
992 | break; | |
993 | case AD_MUX_ATTACHED: | |
994 | __attach_bond_to_agg(port); | |
995 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
996 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
997 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
998 | ad_disable_collecting_distributing(port); | |
d238d458 | 999 | port->ntt = true; |
1da177e4 LT |
1000 | break; |
1001 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1002 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
1003 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
1004 | ad_enable_collecting_distributing(port); | |
d238d458 | 1005 | port->ntt = true; |
1da177e4 LT |
1006 | break; |
1007 | default: //to silence the compiler | |
1008 | break; | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | /** | |
1014 | * ad_rx_machine - handle a port's rx State Machine | |
1015 | * @lacpdu: the lacpdu we've received | |
1016 | * @port: the port we're looking at | |
1017 | * | |
1018 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
1019 | * CURRENT. If timer expired set the state machine in the proper state. | |
1020 | * In other cases, this function checks if we need to switch to other state. | |
1021 | */ | |
1022 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
1023 | { | |
1024 | rx_states_t last_state; | |
1025 | ||
1da177e4 LT |
1026 | // keep current State Machine state to compare later if it was changed |
1027 | last_state = port->sm_rx_state; | |
1028 | ||
1029 | // check if state machine should change state | |
1030 | // first, check if port was reinitialized | |
7bfc4753 BD |
1031 | if (port->sm_vars & AD_PORT_BEGIN) |
1032 | /* next state */ | |
1033 | port->sm_rx_state = AD_RX_INITIALIZE; | |
1da177e4 | 1034 | // check if port is not enabled |
7bfc4753 BD |
1035 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
1036 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
1037 | /* next state */ | |
1038 | port->sm_rx_state = AD_RX_PORT_DISABLED; | |
1da177e4 LT |
1039 | // check if new lacpdu arrived |
1040 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { | |
1041 | port->sm_rx_timer_counter = 0; // zero timer | |
1042 | port->sm_rx_state = AD_RX_CURRENT; | |
1043 | } else { | |
1044 | // if timer is on, and if it is expired | |
1045 | if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { | |
1046 | switch (port->sm_rx_state) { | |
1047 | case AD_RX_EXPIRED: | |
1048 | port->sm_rx_state = AD_RX_DEFAULTED; // next state | |
1049 | break; | |
1050 | case AD_RX_CURRENT: | |
1051 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1052 | break; | |
1053 | default: //to silence the compiler | |
1054 | break; | |
1055 | } | |
1056 | } else { | |
1057 | // if no lacpdu arrived and no timer is on | |
1058 | switch (port->sm_rx_state) { | |
1059 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 1060 | if (port->sm_vars & AD_PORT_MOVED) |
1da177e4 | 1061 | port->sm_rx_state = AD_RX_INITIALIZE; // next state |
7bfc4753 BD |
1062 | else if (port->is_enabled |
1063 | && (port->sm_vars | |
1064 | & AD_PORT_LACP_ENABLED)) | |
1da177e4 | 1065 | port->sm_rx_state = AD_RX_EXPIRED; // next state |
7bfc4753 BD |
1066 | else if (port->is_enabled |
1067 | && ((port->sm_vars | |
1068 | & AD_PORT_LACP_ENABLED) == 0)) | |
1da177e4 | 1069 | port->sm_rx_state = AD_RX_LACP_DISABLED; // next state |
1da177e4 LT |
1070 | break; |
1071 | default: //to silence the compiler | |
1072 | break; | |
1073 | ||
1074 | } | |
1075 | } | |
1076 | } | |
1077 | ||
1078 | // check if the State machine was changed or new lacpdu arrived | |
1079 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
a4aee5c8 JP |
1080 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1081 | port->actor_port_number, last_state, | |
1082 | port->sm_rx_state); | |
1da177e4 LT |
1083 | switch (port->sm_rx_state) { |
1084 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1085 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1086 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1087 | else |
1da177e4 | 1088 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
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; |
8e321c4f JL |
1113 | port->partner_oper.port_state |= |
1114 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 LT |
1115 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1116 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1117 | break; | |
1118 | case AD_RX_DEFAULTED: | |
1119 | __update_default_selected(port); | |
1120 | __record_default(port); | |
1121 | port->sm_vars |= AD_PORT_MATCHED; | |
1122 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1123 | break; | |
1124 | case AD_RX_CURRENT: | |
1125 | // detect loopback situation | |
1126 | if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { | |
1127 | // INFO_RECEIVED_LOOPBACK_FRAMES | |
a4aee5c8 JP |
1128 | pr_err("%s: An illegal loopback occurred on adapter (%s).\n" |
1129 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", | |
4e0952c7 | 1130 | port->slave->dev->master->name, port->slave->dev->name); |
1da177e4 LT |
1131 | return; |
1132 | } | |
1133 | __update_selected(lacpdu, port); | |
1134 | __update_ntt(lacpdu, port); | |
1135 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1136 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1137 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1138 | // verify that if the aggregator is enabled, the port is enabled too. | |
1139 | //(because if the link goes down for a short time, the 802.3ad will not | |
1140 | // catch it, and the port will continue to be disabled) | |
7bfc4753 BD |
1141 | if (port->aggregator |
1142 | && port->aggregator->is_active | |
1143 | && !__port_is_enabled(port)) | |
1da177e4 | 1144 | __enable_port(port); |
1da177e4 LT |
1145 | break; |
1146 | default: //to silence the compiler | |
1147 | break; | |
1148 | } | |
1149 | } | |
1da177e4 LT |
1150 | } |
1151 | ||
1152 | /** | |
1153 | * ad_tx_machine - handle a port's tx state machine | |
1154 | * @port: the port we're looking at | |
1155 | * | |
1156 | */ | |
1157 | static void ad_tx_machine(struct port *port) | |
1158 | { | |
1159 | // check if tx timer expired, to verify that we do not send more than 3 packets per second | |
1160 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1161 | // check if there is something to send | |
1162 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1163 | __update_lacpdu_from_port(port); | |
d238d458 | 1164 | |
1da177e4 | 1165 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1166 | pr_debug("Sent LACPDU on port %d\n", |
1167 | port->actor_port_number); | |
d238d458 HE |
1168 | |
1169 | /* mark ntt as false, so it will not be sent again until | |
1170 | demanded */ | |
1171 | port->ntt = false; | |
1da177e4 LT |
1172 | } |
1173 | } | |
1174 | // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND | |
128ea6c3 BD |
1175 | port->sm_tx_timer_counter = |
1176 | ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
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: | |
7bfc4753 BD |
1209 | if (!(port->partner_oper.port_state |
1210 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1211 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
1da177e4 LT |
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: | |
7bfc4753 BD |
1230 | if (!(port->partner_oper.port_state |
1231 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1232 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
7bfc4753 | 1233 | else |
1da177e4 | 1234 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state |
1da177e4 LT |
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) { | |
a4aee5c8 JP |
1243 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1244 | port->actor_port_number, last_state, | |
1245 | port->sm_periodic_state); | |
1da177e4 LT |
1246 | switch (port->sm_periodic_state) { |
1247 | case AD_NO_PERIODIC: | |
1248 | port->sm_periodic_timer_counter = 0; // zero timer | |
1249 | break; | |
1250 | case AD_FAST_PERIODIC: | |
1251 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle | |
1252 | break; | |
1253 | case AD_SLOW_PERIODIC: | |
1254 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle | |
1255 | break; | |
1256 | case AD_PERIODIC_TX: | |
d238d458 | 1257 | port->ntt = true; |
1da177e4 LT |
1258 | break; |
1259 | default: //to silence the compiler | |
1260 | break; | |
1261 | } | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | /** | |
1266 | * ad_port_selection_logic - select aggregation groups | |
1267 | * @port: the port we're looking at | |
1268 | * | |
1269 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1270 | * selection logic is called in the inititalization (after all the handshkes), | |
1271 | * and after every lacpdu receive (if selected is off). | |
1272 | */ | |
1273 | static void ad_port_selection_logic(struct port *port) | |
1274 | { | |
1275 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1276 | struct port *last_port = NULL, *curr_port; | |
1277 | int found = 0; | |
1278 | ||
1279 | // if the port is already Selected, do nothing | |
7bfc4753 | 1280 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1281 | return; |
1da177e4 LT |
1282 | |
1283 | // if the port is connected to other aggregator, detach it | |
1284 | if (port->aggregator) { | |
1285 | // detach the port from its former aggregator | |
128ea6c3 BD |
1286 | temp_aggregator = port->aggregator; |
1287 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1288 | last_port = curr_port, | |
1289 | curr_port = curr_port->next_port_in_aggregator) { | |
1da177e4 LT |
1290 | if (curr_port == port) { |
1291 | temp_aggregator->num_of_ports--; | |
1292 | if (!last_port) {// if it is the first port attached to the aggregator | |
128ea6c3 BD |
1293 | temp_aggregator->lag_ports = |
1294 | port->next_port_in_aggregator; | |
1da177e4 | 1295 | } else {// not the first port attached to the aggregator |
128ea6c3 BD |
1296 | last_port->next_port_in_aggregator = |
1297 | port->next_port_in_aggregator; | |
1da177e4 LT |
1298 | } |
1299 | ||
1300 | // clear the port's relations to this aggregator | |
1301 | port->aggregator = NULL; | |
128ea6c3 BD |
1302 | port->next_port_in_aggregator = NULL; |
1303 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1304 | |
a4aee5c8 JP |
1305 | pr_debug("Port %d left LAG %d\n", |
1306 | port->actor_port_number, | |
1307 | temp_aggregator->aggregator_identifier); | |
1da177e4 | 1308 | // if the aggregator is empty, clear its parameters, and set it ready to be attached |
7bfc4753 | 1309 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1310 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1311 | break; |
1312 | } | |
1313 | } | |
1314 | if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list | |
a4aee5c8 | 1315 | pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
e5e2a8fd JP |
1316 | port->slave->dev->master->name, |
1317 | port->actor_port_number, | |
1318 | port->slave->dev->name, | |
1319 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1320 | } |
1321 | } | |
1322 | // search on all aggregators for a suitable aggregator for this port | |
1323 | for (aggregator = __get_first_agg(port); aggregator; | |
1324 | aggregator = __get_next_agg(aggregator)) { | |
1325 | ||
1326 | // keep a free aggregator for later use(if needed) | |
1327 | if (!aggregator->lag_ports) { | |
7bfc4753 | 1328 | if (!free_aggregator) |
128ea6c3 | 1329 | free_aggregator = aggregator; |
1da177e4 LT |
1330 | continue; |
1331 | } | |
1332 | // check if current aggregator suits us | |
1333 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND | |
1055c9ab HE |
1334 | !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && |
1335 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && | |
1336 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1337 | ) && |
1055c9ab | 1338 | ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers |
1da177e4 LT |
1339 | !aggregator->is_individual) // but is not individual OR |
1340 | ) | |
1341 | ) { | |
1342 | // attach to the founded aggregator | |
1343 | port->aggregator = aggregator; | |
128ea6c3 BD |
1344 | port->actor_port_aggregator_identifier = |
1345 | port->aggregator->aggregator_identifier; | |
1346 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1347 | port->aggregator->num_of_ports++; |
128ea6c3 | 1348 | aggregator->lag_ports = port; |
a4aee5c8 JP |
1349 | pr_debug("Port %d joined LAG %d(existing LAG)\n", |
1350 | port->actor_port_number, | |
1351 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1352 | |
1353 | // mark this port as selected | |
1354 | port->sm_vars |= AD_PORT_SELECTED; | |
1355 | found = 1; | |
1356 | break; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | // the port couldn't find an aggregator - attach it to a new aggregator | |
1361 | if (!found) { | |
1362 | if (free_aggregator) { | |
1363 | // assign port a new aggregator | |
1364 | port->aggregator = free_aggregator; | |
128ea6c3 BD |
1365 | port->actor_port_aggregator_identifier = |
1366 | port->aggregator->aggregator_identifier; | |
1da177e4 LT |
1367 | |
1368 | // update the new aggregator's parameters | |
1369 | // if port was responsed from the end-user | |
7bfc4753 BD |
1370 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1371 | /* if port is full duplex */ | |
1624db7b | 1372 | port->aggregator->is_individual = false; |
7bfc4753 | 1373 | else |
1624db7b | 1374 | port->aggregator->is_individual = true; |
1da177e4 LT |
1375 | |
1376 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1377 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1378 | port->aggregator->partner_system = |
1379 | port->partner_oper.system; | |
1380 | port->aggregator->partner_system_priority = | |
1381 | port->partner_oper.system_priority; | |
1055c9ab | 1382 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1383 | port->aggregator->receive_state = 1; |
1384 | port->aggregator->transmit_state = 1; | |
1385 | port->aggregator->lag_ports = port; | |
1386 | port->aggregator->num_of_ports++; | |
1387 | ||
1388 | // mark this port as selected | |
1389 | port->sm_vars |= AD_PORT_SELECTED; | |
1390 | ||
a4aee5c8 JP |
1391 | pr_debug("Port %d joined LAG %d(new LAG)\n", |
1392 | port->actor_port_number, | |
1393 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1394 | } else { |
a4aee5c8 | 1395 | pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", |
4e0952c7 | 1396 | port->slave->dev->master->name, |
1da177e4 LT |
1397 | port->actor_port_number, port->slave->dev->name); |
1398 | } | |
1399 | } | |
1400 | // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports | |
1401 | // else set ready=FALSE in all aggregator's ports | |
1402 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1403 | ||
fd989c83 JV |
1404 | aggregator = __get_first_agg(port); |
1405 | ad_agg_selection_logic(aggregator); | |
1406 | } | |
1407 | ||
1408 | /* | |
1409 | * Decide if "agg" is a better choice for the new active aggregator that | |
1410 | * the current best, according to the ad_select policy. | |
1411 | */ | |
1412 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1413 | struct aggregator *curr) | |
1414 | { | |
1415 | /* | |
1416 | * 0. If no best, select current. | |
1417 | * | |
1418 | * 1. If the current agg is not individual, and the best is | |
1419 | * individual, select current. | |
1420 | * | |
1421 | * 2. If current agg is individual and the best is not, keep best. | |
1422 | * | |
1423 | * 3. Therefore, current and best are both individual or both not | |
1424 | * individual, so: | |
1425 | * | |
1426 | * 3a. If current agg partner replied, and best agg partner did not, | |
1427 | * select current. | |
1428 | * | |
1429 | * 3b. If current agg partner did not reply and best agg partner | |
1430 | * did reply, keep best. | |
1431 | * | |
1432 | * 4. Therefore, current and best both have partner replies or | |
1433 | * both do not, so perform selection policy: | |
1434 | * | |
1435 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1436 | * select by bandwidth. | |
1437 | * | |
1438 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1439 | */ | |
1440 | if (!best) | |
1441 | return curr; | |
1442 | ||
1443 | if (!curr->is_individual && best->is_individual) | |
1444 | return curr; | |
1445 | ||
1446 | if (curr->is_individual && !best->is_individual) | |
1447 | return best; | |
1448 | ||
1449 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1450 | return curr; | |
1451 | ||
1452 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1453 | return best; | |
1454 | ||
1455 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1456 | case BOND_AD_COUNT: | |
1457 | if (curr->num_of_ports > best->num_of_ports) | |
1458 | return curr; | |
1459 | ||
1460 | if (curr->num_of_ports < best->num_of_ports) | |
1461 | return best; | |
1462 | ||
1463 | /*FALLTHROUGH*/ | |
1464 | case BOND_AD_STABLE: | |
1465 | case BOND_AD_BANDWIDTH: | |
1466 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1467 | return curr; | |
1468 | ||
1469 | break; | |
1470 | ||
1471 | default: | |
a4aee5c8 | 1472 | pr_warning("%s: Impossible agg select mode %d\n", |
e5e2a8fd JP |
1473 | curr->slave->dev->master->name, |
1474 | __get_agg_selection_mode(curr->lag_ports)); | |
fd989c83 | 1475 | break; |
1da177e4 | 1476 | } |
fd989c83 JV |
1477 | |
1478 | return best; | |
1da177e4 LT |
1479 | } |
1480 | ||
4cd6fe1c SH |
1481 | static int agg_device_up(const struct aggregator *agg) |
1482 | { | |
2430af8b JB |
1483 | struct port *port = agg->lag_ports; |
1484 | if (!port) | |
1485 | return 0; | |
1486 | return (netif_running(port->slave->dev) && | |
1487 | netif_carrier_ok(port->slave->dev)); | |
4cd6fe1c SH |
1488 | } |
1489 | ||
1da177e4 LT |
1490 | /** |
1491 | * ad_agg_selection_logic - select an aggregation group for a team | |
1492 | * @aggregator: the aggregator we're looking at | |
1493 | * | |
1494 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1495 | * |
1496 | * The logic of this function is to select the aggregator according to | |
1497 | * the ad_select policy: | |
1498 | * | |
1499 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1500 | * it, and to reselect the active aggregator only if the previous | |
1501 | * aggregator has no more ports related to it. | |
1502 | * | |
1503 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1504 | * bandwidth, and reselect whenever a link state change takes place or the | |
1505 | * set of slaves in the bond changes. | |
1506 | * | |
1507 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1508 | * (slaves), and reselect whenever a link state change takes place or the | |
1509 | * set of slaves in the bond changes. | |
1da177e4 LT |
1510 | * |
1511 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1512 | * __get_active_agg() won't work correctly. This function should be better | |
1513 | * called with the bond itself, and retrieve the first agg from it. | |
1514 | */ | |
fd989c83 | 1515 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1516 | { |
fd989c83 | 1517 | struct aggregator *best, *active, *origin; |
1da177e4 | 1518 | struct port *port; |
1da177e4 | 1519 | |
fd989c83 | 1520 | origin = agg; |
fd989c83 | 1521 | active = __get_active_agg(agg); |
4cd6fe1c | 1522 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1523 | |
1da177e4 | 1524 | do { |
fd989c83 JV |
1525 | agg->is_active = 0; |
1526 | ||
4cd6fe1c | 1527 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 JV |
1528 | best = ad_agg_selection_test(best, agg); |
1529 | ||
1530 | } while ((agg = __get_next_agg(agg))); | |
1531 | ||
1532 | if (best && | |
1533 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
1534 | /* | |
1535 | * For the STABLE policy, don't replace the old active | |
1536 | * aggregator if it's still active (it has an answering | |
1537 | * partner) or if both the best and active don't have an | |
1538 | * answering partner. | |
1539 | */ | |
1540 | if (active && active->lag_ports && | |
1541 | active->lag_ports->is_enabled && | |
1542 | (__agg_has_partner(active) || | |
1543 | (!__agg_has_partner(active) && !__agg_has_partner(best)))) { | |
1544 | if (!(!active->actor_oper_aggregator_key && | |
1545 | best->actor_oper_aggregator_key)) { | |
1546 | best = NULL; | |
1547 | active->is_active = 1; | |
1da177e4 LT |
1548 | } |
1549 | } | |
fd989c83 | 1550 | } |
1da177e4 | 1551 | |
fd989c83 JV |
1552 | if (best && (best == active)) { |
1553 | best = NULL; | |
1554 | active->is_active = 1; | |
1da177e4 LT |
1555 | } |
1556 | ||
1557 | // if there is new best aggregator, activate it | |
fd989c83 | 1558 | if (best) { |
5a03cdb7 | 1559 | pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1560 | best->aggregator_identifier, best->num_of_ports, |
1561 | best->actor_oper_aggregator_key, | |
1562 | best->partner_oper_aggregator_key, | |
1563 | best->is_individual, best->is_active); | |
5a03cdb7 | 1564 | pr_debug("best ports %p slave %p %s\n", |
a4aee5c8 JP |
1565 | best->lag_ports, best->slave, |
1566 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 JV |
1567 | |
1568 | for (agg = __get_first_agg(best->lag_ports); agg; | |
1569 | agg = __get_next_agg(agg)) { | |
1570 | ||
5a03cdb7 | 1571 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1572 | agg->aggregator_identifier, agg->num_of_ports, |
1573 | agg->actor_oper_aggregator_key, | |
1574 | agg->partner_oper_aggregator_key, | |
1575 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1576 | } |
1577 | ||
1578 | // check if any partner replys | |
fd989c83 | 1579 | if (best->is_individual) { |
a4aee5c8 | 1580 | pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
c99a3d2e | 1581 | best->slave ? best->slave->dev->master->name : "NULL"); |
1da177e4 LT |
1582 | } |
1583 | ||
fd989c83 | 1584 | best->is_active = 1; |
5a03cdb7 | 1585 | pr_debug("LAG %d chosen as the active LAG\n", |
a4aee5c8 | 1586 | best->aggregator_identifier); |
5a03cdb7 | 1587 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1588 | best->aggregator_identifier, best->num_of_ports, |
1589 | best->actor_oper_aggregator_key, | |
1590 | best->partner_oper_aggregator_key, | |
1591 | best->is_individual, best->is_active); | |
1da177e4 LT |
1592 | |
1593 | // disable the ports that were related to the former active_aggregator | |
fd989c83 JV |
1594 | if (active) { |
1595 | for (port = active->lag_ports; port; | |
1596 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1597 | __disable_port(port); |
1598 | } | |
1599 | } | |
1600 | } | |
1601 | ||
fd989c83 JV |
1602 | /* |
1603 | * if the selected aggregator is of join individuals | |
1604 | * (partner_system is NULL), enable their ports | |
1605 | */ | |
1606 | active = __get_active_agg(origin); | |
1da177e4 | 1607 | |
fd989c83 JV |
1608 | if (active) { |
1609 | if (!__agg_has_partner(active)) { | |
1610 | for (port = active->lag_ports; port; | |
1611 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1612 | __enable_port(port); |
1613 | } | |
1614 | } | |
1615 | } | |
fd989c83 JV |
1616 | |
1617 | if (origin->slave) { | |
1618 | struct bonding *bond; | |
1619 | ||
1620 | bond = bond_get_bond_by_slave(origin->slave); | |
1621 | if (bond) | |
1622 | bond_3ad_set_carrier(bond); | |
1623 | } | |
1da177e4 LT |
1624 | } |
1625 | ||
1626 | /** | |
1627 | * ad_clear_agg - clear a given aggregator's parameters | |
1628 | * @aggregator: the aggregator we're looking at | |
1629 | * | |
1630 | */ | |
1631 | static void ad_clear_agg(struct aggregator *aggregator) | |
1632 | { | |
1633 | if (aggregator) { | |
1624db7b | 1634 | aggregator->is_individual = false; |
1da177e4 LT |
1635 | aggregator->actor_admin_aggregator_key = 0; |
1636 | aggregator->actor_oper_aggregator_key = 0; | |
1637 | aggregator->partner_system = null_mac_addr; | |
1638 | aggregator->partner_system_priority = 0; | |
1639 | aggregator->partner_oper_aggregator_key = 0; | |
1640 | aggregator->receive_state = 0; | |
1641 | aggregator->transmit_state = 0; | |
1642 | aggregator->lag_ports = NULL; | |
1643 | aggregator->is_active = 0; | |
1644 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1645 | pr_debug("LAG %d was cleared\n", |
1646 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1647 | } |
1648 | } | |
1649 | ||
1650 | /** | |
1651 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1652 | * @aggregator: the aggregator we're looking at | |
1653 | * | |
1654 | */ | |
1655 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1656 | { | |
1657 | if (aggregator) { | |
1658 | ad_clear_agg(aggregator); | |
1659 | ||
1660 | aggregator->aggregator_mac_address = null_mac_addr; | |
1661 | aggregator->aggregator_identifier = 0; | |
1662 | aggregator->slave = NULL; | |
1663 | } | |
1664 | } | |
1665 | ||
1666 | /** | |
1667 | * ad_initialize_port - initialize a given port's parameters | |
1668 | * @aggregator: the aggregator we're looking at | |
1669 | * @lacp_fast: boolean. whether fast periodic should be used | |
1670 | * | |
1671 | */ | |
1672 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1673 | { | |
c7e703d0 HE |
1674 | static const struct port_params tmpl = { |
1675 | .system_priority = 0xffff, | |
1676 | .key = 1, | |
1677 | .port_number = 1, | |
1678 | .port_priority = 0xff, | |
1679 | .port_state = 1, | |
1680 | }; | |
7addeef6 HE |
1681 | static const struct lacpdu lacpdu = { |
1682 | .subtype = 0x01, | |
1683 | .version_number = 0x01, | |
1684 | .tlv_type_actor_info = 0x01, | |
1685 | .actor_information_length = 0x14, | |
1686 | .tlv_type_partner_info = 0x02, | |
1687 | .partner_information_length = 0x14, | |
1688 | .tlv_type_collector_info = 0x03, | |
1689 | .collector_information_length = 0x10, | |
1690 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1691 | }; | |
c7e703d0 | 1692 | |
1da177e4 LT |
1693 | if (port) { |
1694 | port->actor_port_number = 1; | |
1695 | port->actor_port_priority = 0xff; | |
1696 | port->actor_system = null_mac_addr; | |
1697 | port->actor_system_priority = 0xffff; | |
1698 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1699 | port->ntt = false; |
1da177e4 LT |
1700 | port->actor_admin_port_key = 1; |
1701 | port->actor_oper_port_key = 1; | |
1702 | port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1703 | port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1704 | ||
7bfc4753 | 1705 | if (lacp_fast) |
1da177e4 | 1706 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1707 | |
c7e703d0 HE |
1708 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1709 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1710 | ||
f48127b6 | 1711 | port->is_enabled = true; |
1da177e4 LT |
1712 | // ****** private parameters ****** |
1713 | port->sm_vars = 0x3; | |
1714 | port->sm_rx_state = 0; | |
1715 | port->sm_rx_timer_counter = 0; | |
1716 | port->sm_periodic_state = 0; | |
1717 | port->sm_periodic_timer_counter = 0; | |
1718 | port->sm_mux_state = 0; | |
1719 | port->sm_mux_timer_counter = 0; | |
1720 | port->sm_tx_state = 0; | |
1721 | port->sm_tx_timer_counter = 0; | |
1722 | port->slave = NULL; | |
1723 | port->aggregator = NULL; | |
1724 | port->next_port_in_aggregator = NULL; | |
1725 | port->transaction_id = 0; | |
1726 | ||
7addeef6 | 1727 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1728 | } |
1729 | } | |
1730 | ||
1731 | /** | |
1732 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1733 | * @port: the port we're looking at | |
1734 | * | |
1735 | * Enable @port if it's in an active aggregator | |
1736 | */ | |
1737 | static void ad_enable_collecting_distributing(struct port *port) | |
1738 | { | |
1739 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1740 | pr_debug("Enabling port %d(LAG %d)\n", |
1741 | port->actor_port_number, | |
1742 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1743 | __enable_port(port); |
1744 | } | |
1745 | } | |
1746 | ||
1747 | /** | |
1748 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1749 | * @port: the port we're looking at | |
1750 | * | |
1751 | */ | |
1752 | static void ad_disable_collecting_distributing(struct port *port) | |
1753 | { | |
1754 | if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { | |
a4aee5c8 JP |
1755 | pr_debug("Disabling port %d(LAG %d)\n", |
1756 | port->actor_port_number, | |
1757 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1758 | __disable_port(port); |
1759 | } | |
1760 | } | |
1761 | ||
1762 | #if 0 | |
1763 | /** | |
1764 | * ad_marker_info_send - send a marker information frame | |
1765 | * @port: the port we're looking at | |
1766 | * | |
1767 | * This function does nothing since we decided not to implement send and handle | |
1768 | * response for marker PDU's, in this stage, but only to respond to marker | |
1769 | * information. | |
1770 | */ | |
1771 | static void ad_marker_info_send(struct port *port) | |
1772 | { | |
1c3f0b8e | 1773 | struct bond_marker marker; |
1da177e4 LT |
1774 | u16 index; |
1775 | ||
1776 | // fill the marker PDU with the appropriate values | |
1777 | marker.subtype = 0x02; | |
1778 | marker.version_number = 0x01; | |
1779 | marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; | |
1780 | marker.marker_length = 0x16; | |
1781 | // convert requester_port to Big Endian | |
1782 | marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); | |
1783 | marker.requester_system = port->actor_system; | |
1784 | // convert requester_port(u32) to Big Endian | |
128ea6c3 BD |
1785 | marker.requester_transaction_id = |
1786 | (((++port->transaction_id & 0xFF) << 24) | |
1787 | | ((port->transaction_id & 0xFF00) << 8) | |
1788 | | ((port->transaction_id & 0xFF0000) >> 8) | |
1789 | | ((port->transaction_id & 0xFF000000) >> 24)); | |
1da177e4 LT |
1790 | marker.pad = 0; |
1791 | marker.tlv_type_terminator = 0x00; | |
1792 | marker.terminator_length = 0x00; | |
128ea6c3 BD |
1793 | for (index = 0; index < 90; index++) |
1794 | marker.reserved_90[index] = 0; | |
1da177e4 LT |
1795 | |
1796 | // send the marker information | |
1797 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1798 | pr_debug("Sent Marker Information on port %d\n", |
1799 | port->actor_port_number); | |
1da177e4 LT |
1800 | } |
1801 | } | |
1802 | #endif | |
1803 | ||
1804 | /** | |
1805 | * ad_marker_info_received - handle receive of a Marker information frame | |
1806 | * @marker_info: Marker info received | |
1807 | * @port: the port we're looking at | |
1808 | * | |
1809 | */ | |
1c3f0b8e MD |
1810 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1811 | struct port *port) | |
1da177e4 | 1812 | { |
1c3f0b8e | 1813 | struct bond_marker marker; |
1da177e4 LT |
1814 | |
1815 | // copy the received marker data to the response marker | |
1816 | //marker = *marker_info; | |
1c3f0b8e | 1817 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
1da177e4 | 1818 | // change the marker subtype to marker response |
128ea6c3 | 1819 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 LT |
1820 | // send the marker response |
1821 | ||
1822 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1823 | pr_debug("Sent Marker Response on port %d\n", |
1824 | port->actor_port_number); | |
1da177e4 LT |
1825 | } |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * ad_marker_response_received - handle receive of a marker response frame | |
1830 | * @marker: marker PDU received | |
1831 | * @port: the port we're looking at | |
1832 | * | |
1833 | * This function does nothing since we decided not to implement send and handle | |
1834 | * response for marker PDU's, in this stage, but only to respond to marker | |
1835 | * information. | |
1836 | */ | |
1c3f0b8e MD |
1837 | static void ad_marker_response_received(struct bond_marker *marker, |
1838 | struct port *port) | |
1da177e4 | 1839 | { |
128ea6c3 BD |
1840 | marker = NULL; /* just to satisfy the compiler */ |
1841 | port = NULL; /* just to satisfy the compiler */ | |
1da177e4 LT |
1842 | // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW |
1843 | } | |
1844 | ||
1da177e4 LT |
1845 | ////////////////////////////////////////////////////////////////////////////////////// |
1846 | // ================= AD exported functions to the main bonding code ================== | |
1847 | ////////////////////////////////////////////////////////////////////////////////////// | |
1848 | ||
1849 | // Check aggregators status in team every T seconds | |
1850 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1851 | ||
fd989c83 JV |
1852 | /* |
1853 | * bond_3ad_initiate_agg_selection(struct bonding *bond) | |
1854 | * | |
1855 | * Set the aggregation selection timer, to initiate an agg selection in | |
1856 | * the very near future. Called during first initialization, and during | |
1857 | * any down to up transitions of the bond. | |
1858 | */ | |
1859 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1860 | { | |
1861 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
1862 | BOND_AD_INFO(bond).agg_select_mode = bond->params.ad_select; | |
1863 | } | |
1864 | ||
1da177e4 LT |
1865 | static u16 aggregator_identifier; |
1866 | ||
1867 | /** | |
1868 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1869 | * @bond: bonding struct to work on | |
1870 | * @tick_resolution: tick duration (millisecond resolution) | |
1871 | * @lacp_fast: boolean. whether fast periodic should be used | |
1872 | * | |
1873 | * Can be called only after the mac address of the bond is set. | |
1874 | */ | |
1875 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution, int lacp_fast) | |
3a6d54c5 | 1876 | { |
1da177e4 | 1877 | // check that the bond is not initialized yet |
3a6d54c5 JP |
1878 | if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), |
1879 | bond->dev->dev_addr)) { | |
1da177e4 LT |
1880 | |
1881 | aggregator_identifier = 0; | |
1882 | ||
1883 | BOND_AD_INFO(bond).lacp_fast = lacp_fast; | |
1884 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; | |
1885 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1886 | ||
1887 | // initialize how many times this module is called in one second(should be about every 100ms) | |
1888 | ad_ticks_per_sec = tick_resolution; | |
1889 | ||
fd989c83 JV |
1890 | bond_3ad_initiate_agg_selection(bond, |
1891 | AD_AGGREGATOR_SELECTION_TIMER * | |
1892 | ad_ticks_per_sec); | |
1da177e4 LT |
1893 | } |
1894 | } | |
1895 | ||
1896 | /** | |
1897 | * bond_3ad_bind_slave - initialize a slave's port | |
1898 | * @slave: slave struct to work on | |
1899 | * | |
1900 | * Returns: 0 on success | |
1901 | * < 0 on error | |
1902 | */ | |
1903 | int bond_3ad_bind_slave(struct slave *slave) | |
1904 | { | |
1905 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1906 | struct port *port; | |
1907 | struct aggregator *aggregator; | |
1908 | ||
1909 | if (bond == NULL) { | |
a4aee5c8 | 1910 | pr_err("%s: The slave %s is not attached to its bond\n", |
4e0952c7 | 1911 | slave->dev->master->name, slave->dev->name); |
1da177e4 LT |
1912 | return -1; |
1913 | } | |
1914 | ||
b595076a | 1915 | //check that the slave has not been initialized yet. |
1da177e4 LT |
1916 | if (SLAVE_AD_INFO(slave).port.slave != slave) { |
1917 | ||
1918 | // port initialization | |
1919 | port = &(SLAVE_AD_INFO(slave).port); | |
1920 | ||
1921 | ad_initialize_port(port, BOND_AD_INFO(bond).lacp_fast); | |
1922 | ||
1923 | port->slave = slave; | |
1924 | port->actor_port_number = SLAVE_AD_INFO(slave).id; | |
1925 | // key is determined according to the link speed, duplex and user key(which is yet not supported) | |
1926 | // ------------------------------------------------------------ | |
1927 | // Port key : | User key | Speed |Duplex| | |
1928 | // ------------------------------------------------------------ | |
1929 | // 16 6 1 0 | |
1930 | port->actor_admin_port_key = 0; // initialize this parameter | |
1931 | port->actor_admin_port_key |= __get_duplex(port); | |
1932 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1933 | port->actor_oper_port_key = port->actor_admin_port_key; | |
1934 | // if the port is not full duplex, then the port should be not lacp Enabled | |
7bfc4753 | 1935 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1936 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1937 | // actor system is the bond's system |
1938 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
1939 | // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) | |
1940 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1941 | port->aggregator = NULL; | |
1942 | port->next_port_in_aggregator = NULL; | |
1943 | ||
1944 | __disable_port(port); | |
1945 | __initialize_port_locks(port); | |
1946 | ||
1947 | ||
1948 | // aggregator initialization | |
1949 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1950 | ||
1951 | ad_initialize_agg(aggregator); | |
1952 | ||
1953 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
1954 | aggregator->aggregator_identifier = (++aggregator_identifier); | |
1955 | aggregator->slave = slave; | |
1956 | aggregator->is_active = 0; | |
1957 | aggregator->num_of_ports = 0; | |
1958 | } | |
1959 | ||
1960 | return 0; | |
1961 | } | |
1962 | ||
1963 | /** | |
1964 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1965 | * @slave: slave struct to work on | |
1966 | * | |
1967 | * Search for the aggregator that is related to this port, remove the | |
1968 | * aggregator and assign another aggregator for other port related to it | |
1969 | * (if any), and remove the port. | |
1970 | */ | |
1971 | void bond_3ad_unbind_slave(struct slave *slave) | |
1972 | { | |
1973 | struct port *port, *prev_port, *temp_port; | |
1974 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1975 | int select_new_active_agg = 0; | |
a361c83c | 1976 | |
1da177e4 LT |
1977 | // find the aggregator related to this slave |
1978 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1979 | ||
1980 | // find the port related to this slave | |
1981 | port = &(SLAVE_AD_INFO(slave).port); | |
1982 | ||
1983 | // if slave is null, the whole port is not initialized | |
1984 | if (!port->slave) { | |
a4aee5c8 | 1985 | pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", |
e5e2a8fd | 1986 | slave->dev->master->name, slave->dev->name); |
1da177e4 LT |
1987 | return; |
1988 | } | |
1989 | ||
a4aee5c8 JP |
1990 | pr_debug("Unbinding Link Aggregation Group %d\n", |
1991 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1992 | |
1993 | /* Tell the partner that this port is not suitable for aggregation */ | |
1994 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1995 | __update_lacpdu_from_port(port); | |
1996 | ad_lacpdu_send(port); | |
1997 | ||
1998 | // check if this aggregator is occupied | |
1999 | if (aggregator->lag_ports) { | |
2000 | // check if there are other ports related to this aggregator except | |
2001 | // the port related to this slave(thats ensure us that there is a | |
2002 | // reason to search for new aggregator, and that we will find one | |
2003 | if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { | |
2004 | // find new aggregator for the related port(s) | |
2005 | new_aggregator = __get_first_agg(port); | |
2006 | for (; new_aggregator; new_aggregator = __get_next_agg(new_aggregator)) { | |
fd589a8f | 2007 | // if the new aggregator is empty, or it is connected to our port only |
7bfc4753 BD |
2008 | if (!new_aggregator->lag_ports |
2009 | || ((new_aggregator->lag_ports == port) | |
2010 | && !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 2011 | break; |
1da177e4 LT |
2012 | } |
2013 | // if new aggregator found, copy the aggregator's parameters | |
2014 | // and connect the related lag_ports to the new aggregator | |
2015 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
a4aee5c8 JP |
2016 | pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", |
2017 | aggregator->aggregator_identifier, | |
2018 | new_aggregator->aggregator_identifier); | |
1da177e4 LT |
2019 | |
2020 | if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { | |
a4aee5c8 | 2021 | pr_info("%s: Removing an active aggregator\n", |
e5e2a8fd | 2022 | aggregator->slave->dev->master->name); |
1da177e4 LT |
2023 | // select new active aggregator |
2024 | select_new_active_agg = 1; | |
2025 | } | |
2026 | ||
2027 | new_aggregator->is_individual = aggregator->is_individual; | |
2028 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
2029 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
2030 | new_aggregator->partner_system = aggregator->partner_system; | |
2031 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
2032 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
2033 | new_aggregator->receive_state = aggregator->receive_state; | |
2034 | new_aggregator->transmit_state = aggregator->transmit_state; | |
2035 | new_aggregator->lag_ports = aggregator->lag_ports; | |
2036 | new_aggregator->is_active = aggregator->is_active; | |
2037 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
2038 | ||
2039 | // update the information that is written on the ports about the aggregator | |
128ea6c3 BD |
2040 | for (temp_port = aggregator->lag_ports; temp_port; |
2041 | temp_port = temp_port->next_port_in_aggregator) { | |
2042 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
2043 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
2044 | } | |
2045 | ||
2046 | // clear the aggregator | |
2047 | ad_clear_agg(aggregator); | |
a361c83c | 2048 | |
7bfc4753 | 2049 | if (select_new_active_agg) |
1da177e4 | 2050 | ad_agg_selection_logic(__get_first_agg(port)); |
1da177e4 | 2051 | } else { |
a4aee5c8 | 2052 | pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", |
e5e2a8fd | 2053 | slave->dev->master->name); |
1da177e4 LT |
2054 | } |
2055 | } else { // in case that the only port related to this aggregator is the one we want to remove | |
2056 | select_new_active_agg = aggregator->is_active; | |
2057 | // clear the aggregator | |
2058 | ad_clear_agg(aggregator); | |
2059 | if (select_new_active_agg) { | |
a4aee5c8 | 2060 | pr_info("%s: Removing an active aggregator\n", |
e5e2a8fd | 2061 | slave->dev->master->name); |
1da177e4 LT |
2062 | // select new active aggregator |
2063 | ad_agg_selection_logic(__get_first_agg(port)); | |
2064 | } | |
2065 | } | |
2066 | } | |
2067 | ||
5a03cdb7 | 2068 | pr_debug("Unbinding port %d\n", port->actor_port_number); |
1da177e4 LT |
2069 | // find the aggregator that this port is connected to |
2070 | temp_aggregator = __get_first_agg(port); | |
2071 | for (; temp_aggregator; temp_aggregator = __get_next_agg(temp_aggregator)) { | |
2072 | prev_port = NULL; | |
2073 | // search the port in the aggregator's related ports | |
128ea6c3 BD |
2074 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2075 | prev_port = temp_port, | |
2076 | temp_port = temp_port->next_port_in_aggregator) { | |
1da177e4 | 2077 | if (temp_port == port) { // the aggregator found - detach the port from this aggregator |
7bfc4753 | 2078 | if (prev_port) |
1da177e4 | 2079 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2080 | else |
1da177e4 | 2081 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2082 | temp_aggregator->num_of_ports--; |
128ea6c3 | 2083 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 LT |
2084 | select_new_active_agg = temp_aggregator->is_active; |
2085 | // clear the aggregator | |
2086 | ad_clear_agg(temp_aggregator); | |
2087 | if (select_new_active_agg) { | |
a4aee5c8 | 2088 | pr_info("%s: Removing an active aggregator\n", |
e5e2a8fd | 2089 | slave->dev->master->name); |
1da177e4 LT |
2090 | // select new active aggregator |
2091 | ad_agg_selection_logic(__get_first_agg(port)); | |
2092 | } | |
2093 | } | |
2094 | break; | |
2095 | } | |
2096 | } | |
2097 | } | |
128ea6c3 | 2098 | port->slave = NULL; |
1da177e4 LT |
2099 | } |
2100 | ||
2101 | /** | |
2102 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2103 | * @bond: bonding struct to work on | |
2104 | * | |
2105 | * The state machine handling concept in this module is to check every tick | |
2106 | * which state machine should operate any function. The execution order is | |
2107 | * round robin, so when we have an interaction between state machines, the | |
2108 | * reply of one to each other might be delayed until next tick. | |
2109 | * | |
2110 | * This function also complete the initialization when the agg_select_timer | |
2111 | * times out, and it selects an aggregator for the ports that are yet not | |
2112 | * related to any aggregator, and selects the active aggregator for a bond. | |
2113 | */ | |
1b76b316 | 2114 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2115 | { |
1b76b316 JV |
2116 | struct bonding *bond = container_of(work, struct bonding, |
2117 | ad_work.work); | |
1da177e4 LT |
2118 | struct port *port; |
2119 | struct aggregator *aggregator; | |
2120 | ||
2121 | read_lock(&bond->lock); | |
2122 | ||
7bfc4753 | 2123 | if (bond->kill_timers) |
1da177e4 | 2124 | goto out; |
1da177e4 LT |
2125 | |
2126 | //check if there are any slaves | |
7bfc4753 | 2127 | if (bond->slave_cnt == 0) |
1da177e4 | 2128 | goto re_arm; |
1da177e4 LT |
2129 | |
2130 | // check if agg_select_timer timer after initialize is timed out | |
2131 | if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
2132 | // select the active aggregator for the bond | |
2133 | if ((port = __get_first_port(bond))) { | |
2134 | if (!port->slave) { | |
a4aee5c8 JP |
2135 | pr_warning("%s: Warning: bond's first port is uninitialized\n", |
2136 | bond->dev->name); | |
1da177e4 LT |
2137 | goto re_arm; |
2138 | } | |
2139 | ||
2140 | aggregator = __get_first_agg(port); | |
2141 | ad_agg_selection_logic(aggregator); | |
2142 | } | |
f0c76d61 | 2143 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2144 | } |
2145 | ||
2146 | // for each port run the state machines | |
2147 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2148 | if (!port->slave) { | |
a4aee5c8 JP |
2149 | pr_warning("%s: Warning: Found an uninitialized port\n", |
2150 | bond->dev->name); | |
1da177e4 LT |
2151 | goto re_arm; |
2152 | } | |
2153 | ||
16d79d7d NC |
2154 | /* Lock around state machines to protect data accessed |
2155 | * by all (e.g., port->sm_vars). ad_rx_machine may run | |
2156 | * concurrently due to incoming LACPDU. | |
2157 | */ | |
9ac3524a | 2158 | __get_state_machine_lock(port); |
16d79d7d | 2159 | |
1da177e4 LT |
2160 | ad_rx_machine(NULL, port); |
2161 | ad_periodic_machine(port); | |
2162 | ad_port_selection_logic(port); | |
2163 | ad_mux_machine(port); | |
2164 | ad_tx_machine(port); | |
2165 | ||
2166 | // turn off the BEGIN bit, since we already handled it | |
7bfc4753 | 2167 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2168 | port->sm_vars &= ~AD_PORT_BEGIN; |
16d79d7d | 2169 | |
9ac3524a | 2170 | __release_state_machine_lock(port); |
1da177e4 LT |
2171 | } |
2172 | ||
2173 | re_arm: | |
1b76b316 | 2174 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2175 | out: |
2176 | read_unlock(&bond->lock); | |
2177 | } | |
2178 | ||
2179 | /** | |
2180 | * bond_3ad_rx_indication - handle a received frame | |
2181 | * @lacpdu: received lacpdu | |
2182 | * @slave: slave struct to work on | |
2183 | * @length: length of the data received | |
2184 | * | |
2185 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2186 | * received frames (loopback). Since only the payload is given to this | |
2187 | * function, it check for loopback. | |
2188 | */ | |
2189 | static void bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) | |
2190 | { | |
2191 | struct port *port; | |
2192 | ||
2193 | if (length >= sizeof(struct lacpdu)) { | |
2194 | ||
2195 | port = &(SLAVE_AD_INFO(slave).port); | |
2196 | ||
2197 | if (!port->slave) { | |
a4aee5c8 | 2198 | pr_warning("%s: Warning: port of slave %s is uninitialized\n", |
e5e2a8fd | 2199 | slave->dev->name, slave->dev->master->name); |
1da177e4 LT |
2200 | return; |
2201 | } | |
2202 | ||
2203 | switch (lacpdu->subtype) { | |
2204 | case AD_TYPE_LACPDU: | |
a4aee5c8 JP |
2205 | pr_debug("Received LACPDU on port %d\n", |
2206 | port->actor_port_number); | |
16d79d7d | 2207 | /* Protect against concurrent state machines */ |
9ac3524a | 2208 | __get_state_machine_lock(port); |
1da177e4 | 2209 | ad_rx_machine(lacpdu, port); |
9ac3524a | 2210 | __release_state_machine_lock(port); |
1da177e4 LT |
2211 | break; |
2212 | ||
2213 | case AD_TYPE_MARKER: | |
2214 | // No need to convert fields to Little Endian since we don't use the marker's fields. | |
2215 | ||
1c3f0b8e | 2216 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2217 | case AD_MARKER_INFORMATION_SUBTYPE: |
a4aee5c8 JP |
2218 | pr_debug("Received Marker Information on port %d\n", |
2219 | port->actor_port_number); | |
1c3f0b8e | 2220 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2221 | break; |
2222 | ||
2223 | case AD_MARKER_RESPONSE_SUBTYPE: | |
a4aee5c8 JP |
2224 | pr_debug("Received Marker Response on port %d\n", |
2225 | port->actor_port_number); | |
1c3f0b8e | 2226 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2227 | break; |
2228 | ||
2229 | default: | |
a4aee5c8 JP |
2230 | pr_debug("Received an unknown Marker subtype on slot %d\n", |
2231 | port->actor_port_number); | |
1da177e4 LT |
2232 | } |
2233 | } | |
2234 | } | |
2235 | } | |
2236 | ||
2237 | /** | |
2238 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2239 | * @slave: slave struct to work on | |
2240 | * | |
2241 | * Handle reselection of aggregator (if needed) for this port. | |
2242 | */ | |
2243 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2244 | { | |
2245 | struct port *port; | |
2246 | ||
2247 | port = &(SLAVE_AD_INFO(slave).port); | |
2248 | ||
2249 | // if slave is null, the whole port is not initialized | |
2250 | if (!port->slave) { | |
a4aee5c8 | 2251 | pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", |
e5e2a8fd | 2252 | slave->dev->master->name, slave->dev->name); |
1da177e4 LT |
2253 | return; |
2254 | } | |
2255 | ||
2256 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
128ea6c3 BD |
2257 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2258 | (__get_link_speed(port) << 1); | |
5a03cdb7 | 2259 | pr_debug("Port %d changed speed\n", port->actor_port_number); |
1da177e4 LT |
2260 | // there is no need to reselect a new aggregator, just signal the |
2261 | // state machines to reinitialize | |
2262 | port->sm_vars |= AD_PORT_BEGIN; | |
2263 | } | |
2264 | ||
2265 | /** | |
2266 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2267 | * @slave: slave struct to work on | |
2268 | * | |
2269 | * Handle reselection of aggregator (if needed) for this port. | |
2270 | */ | |
2271 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2272 | { | |
2273 | struct port *port; | |
2274 | ||
128ea6c3 | 2275 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 LT |
2276 | |
2277 | // if slave is null, the whole port is not initialized | |
2278 | if (!port->slave) { | |
a4aee5c8 | 2279 | pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", |
e5e2a8fd | 2280 | slave->dev->master->name, slave->dev->name); |
1da177e4 LT |
2281 | return; |
2282 | } | |
2283 | ||
2284 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
128ea6c3 BD |
2285 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2286 | __get_duplex(port); | |
5a03cdb7 | 2287 | pr_debug("Port %d changed duplex\n", port->actor_port_number); |
1da177e4 LT |
2288 | // there is no need to reselect a new aggregator, just signal the |
2289 | // state machines to reinitialize | |
2290 | port->sm_vars |= AD_PORT_BEGIN; | |
2291 | } | |
2292 | ||
2293 | /** | |
2294 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2295 | * @slave: slave struct to work on | |
2296 | * @status: whether the link is now up or down | |
2297 | * | |
2298 | * Handle reselection of aggregator (if needed) for this port. | |
2299 | */ | |
2300 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2301 | { | |
2302 | struct port *port; | |
2303 | ||
2304 | port = &(SLAVE_AD_INFO(slave).port); | |
2305 | ||
2306 | // if slave is null, the whole port is not initialized | |
2307 | if (!port->slave) { | |
a4aee5c8 | 2308 | pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", |
e5e2a8fd | 2309 | slave->dev->master->name, slave->dev->name); |
1da177e4 LT |
2310 | return; |
2311 | } | |
2312 | ||
2313 | // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed) | |
2314 | // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report | |
2315 | if (link == BOND_LINK_UP) { | |
f48127b6 | 2316 | port->is_enabled = true; |
1da177e4 | 2317 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2318 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2319 | __get_duplex(port); | |
1da177e4 | 2320 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2321 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2322 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2323 | } else { |
2324 | /* link has failed */ | |
f48127b6 | 2325 | port->is_enabled = false; |
1da177e4 | 2326 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2327 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2328 | ~AD_SPEED_KEY_BITS); | |
1da177e4 LT |
2329 | } |
2330 | //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); | |
2331 | // there is no need to reselect a new aggregator, just signal the | |
2332 | // state machines to reinitialize | |
2333 | port->sm_vars |= AD_PORT_BEGIN; | |
2334 | } | |
2335 | ||
ff59c456 | 2336 | /* |
a361c83c | 2337 | * set link state for bonding master: if we have an active |
ff59c456 JV |
2338 | * aggregator, we're up, if not, we're down. Presumes that we cannot |
2339 | * have an active aggregator if there are no slaves with link up. | |
2340 | * | |
031ae4de JV |
2341 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2342 | * | |
ff59c456 JV |
2343 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2344 | * change, nonzero if it does. | |
2345 | */ | |
2346 | int bond_3ad_set_carrier(struct bonding *bond) | |
2347 | { | |
031ae4de | 2348 | if (__get_active_agg(&(SLAVE_AD_INFO(bond->first_slave).aggregator))) { |
ff59c456 JV |
2349 | if (!netif_carrier_ok(bond->dev)) { |
2350 | netif_carrier_on(bond->dev); | |
2351 | return 1; | |
2352 | } | |
2353 | return 0; | |
2354 | } | |
2355 | ||
2356 | if (netif_carrier_ok(bond->dev)) { | |
2357 | netif_carrier_off(bond->dev); | |
2358 | return 1; | |
2359 | } | |
2360 | return 0; | |
2361 | } | |
2362 | ||
1da177e4 LT |
2363 | /** |
2364 | * bond_3ad_get_active_agg_info - get information of the active aggregator | |
2365 | * @bond: bonding struct to work on | |
2366 | * @ad_info: ad_info struct to fill with the bond's info | |
2367 | * | |
2368 | * Returns: 0 on success | |
2369 | * < 0 on error | |
2370 | */ | |
2371 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2372 | { | |
2373 | struct aggregator *aggregator = NULL; | |
2374 | struct port *port; | |
2375 | ||
2376 | for (port = __get_first_port(bond); port; port = __get_next_port(port)) { | |
2377 | if (port->aggregator && port->aggregator->is_active) { | |
2378 | aggregator = port->aggregator; | |
2379 | break; | |
2380 | } | |
2381 | } | |
2382 | ||
2383 | if (aggregator) { | |
2384 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2385 | ad_info->ports = aggregator->num_of_ports; | |
2386 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2387 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2388 | memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); | |
2389 | return 0; | |
2390 | } | |
2391 | ||
2392 | return -1; | |
2393 | } | |
2394 | ||
2395 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) | |
2396 | { | |
2397 | struct slave *slave, *start_at; | |
454d7c9b | 2398 | struct bonding *bond = netdev_priv(dev); |
1da177e4 LT |
2399 | int slave_agg_no; |
2400 | int slaves_in_agg; | |
2401 | int agg_id; | |
2402 | int i; | |
2403 | struct ad_info ad_info; | |
2404 | int res = 1; | |
2405 | ||
1da177e4 | 2406 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { |
a4aee5c8 JP |
2407 | pr_debug("%s: Error: bond_3ad_get_active_agg_info failed\n", |
2408 | dev->name); | |
1da177e4 LT |
2409 | goto out; |
2410 | } | |
2411 | ||
2412 | slaves_in_agg = ad_info.ports; | |
2413 | agg_id = ad_info.aggregator_id; | |
2414 | ||
2415 | if (slaves_in_agg == 0) { | |
2416 | /*the aggregator is empty*/ | |
a4aee5c8 | 2417 | pr_debug("%s: Error: active aggregator is empty\n", dev->name); |
1da177e4 LT |
2418 | goto out; |
2419 | } | |
2420 | ||
a361c83c | 2421 | slave_agg_no = bond->xmit_hash_policy(skb, slaves_in_agg); |
1da177e4 LT |
2422 | |
2423 | bond_for_each_slave(bond, slave, i) { | |
2424 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2425 | ||
2426 | if (agg && (agg->aggregator_identifier == agg_id)) { | |
2427 | slave_agg_no--; | |
7bfc4753 | 2428 | if (slave_agg_no < 0) |
1da177e4 | 2429 | break; |
1da177e4 LT |
2430 | } |
2431 | } | |
2432 | ||
2433 | if (slave_agg_no >= 0) { | |
a4aee5c8 JP |
2434 | pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", |
2435 | dev->name, agg_id); | |
1da177e4 LT |
2436 | goto out; |
2437 | } | |
2438 | ||
2439 | start_at = slave; | |
2440 | ||
2441 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
2442 | int slave_agg_id = 0; | |
2443 | struct aggregator *agg = SLAVE_AD_INFO(slave).port.aggregator; | |
2444 | ||
7bfc4753 | 2445 | if (agg) |
1da177e4 | 2446 | slave_agg_id = agg->aggregator_identifier; |
1da177e4 LT |
2447 | |
2448 | if (SLAVE_IS_OK(slave) && agg && (slave_agg_id == agg_id)) { | |
2449 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
2450 | break; | |
2451 | } | |
2452 | } | |
2453 | ||
2454 | out: | |
2455 | if (res) { | |
2456 | /* no suitable interface, frame not sent */ | |
2457 | dev_kfree_skb(skb); | |
2458 | } | |
0693e88e | 2459 | |
ec634fe3 | 2460 | return NETDEV_TX_OK; |
1da177e4 LT |
2461 | } |
2462 | ||
3aba891d JP |
2463 | void bond_3ad_lacpdu_recv(struct sk_buff *skb, struct bonding *bond, |
2464 | struct slave *slave) | |
1da177e4 | 2465 | { |
3aba891d JP |
2466 | if (skb->protocol != PKT_TYPE_LACPDU) |
2467 | return; | |
b3053251 | 2468 | |
ab12811c | 2469 | if (!pskb_may_pull(skb, sizeof(struct lacpdu))) |
3aba891d | 2470 | return; |
ab12811c | 2471 | |
1da177e4 | 2472 | read_lock(&bond->lock); |
1da177e4 | 2473 | bond_3ad_rx_indication((struct lacpdu *) skb->data, slave, skb->len); |
1da177e4 | 2474 | read_unlock(&bond->lock); |
1da177e4 | 2475 | } |