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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 | ||
1da177e4 LT |
138 | /** |
139 | * __get_first_agg - get the first aggregator in the bond | |
140 | * @bond: the bond we're looking at | |
141 | * | |
142 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
143 | * found. | |
144 | */ | |
145 | static inline struct aggregator *__get_first_agg(struct port *port) | |
146 | { | |
147 | struct bonding *bond = __get_bond_by_port(port); | |
dec1e90e | 148 | struct slave *first_slave; |
1da177e4 LT |
149 | |
150 | // If there's no bond for this port, or bond has no slaves | |
dec1e90e | 151 | if (bond == NULL) |
1da177e4 | 152 | return NULL; |
dec1e90e | 153 | first_slave = bond_first_slave(bond); |
1da177e4 | 154 | |
dec1e90e | 155 | return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL; |
1da177e4 LT |
156 | } |
157 | ||
fd989c83 JV |
158 | /* |
159 | * __agg_has_partner | |
160 | * | |
161 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
162 | * address for the partner). Return 0 if not. | |
163 | */ | |
164 | static inline int __agg_has_partner(struct aggregator *agg) | |
165 | { | |
166 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
167 | } | |
168 | ||
1da177e4 LT |
169 | /** |
170 | * __disable_port - disable the port's slave | |
171 | * @port: the port we're looking at | |
172 | * | |
173 | */ | |
174 | static inline void __disable_port(struct port *port) | |
175 | { | |
176 | bond_set_slave_inactive_flags(port->slave); | |
177 | } | |
178 | ||
179 | /** | |
180 | * __enable_port - enable the port's slave, if it's up | |
181 | * @port: the port we're looking at | |
182 | * | |
183 | */ | |
184 | static inline void __enable_port(struct port *port) | |
185 | { | |
186 | struct slave *slave = port->slave; | |
187 | ||
7bfc4753 | 188 | if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) |
1da177e4 | 189 | bond_set_slave_active_flags(slave); |
1da177e4 LT |
190 | } |
191 | ||
192 | /** | |
193 | * __port_is_enabled - check if the port's slave is in active state | |
194 | * @port: the port we're looking at | |
195 | * | |
196 | */ | |
197 | static inline int __port_is_enabled(struct port *port) | |
198 | { | |
e30bc066 | 199 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
200 | } |
201 | ||
202 | /** | |
203 | * __get_agg_selection_mode - get the aggregator selection mode | |
204 | * @port: the port we're looking at | |
205 | * | |
fd989c83 | 206 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
207 | */ |
208 | static inline u32 __get_agg_selection_mode(struct port *port) | |
209 | { | |
210 | struct bonding *bond = __get_bond_by_port(port); | |
211 | ||
7bfc4753 | 212 | if (bond == NULL) |
fd989c83 | 213 | return BOND_AD_STABLE; |
1da177e4 | 214 | |
1a14fbcb | 215 | return bond->params.ad_select; |
1da177e4 LT |
216 | } |
217 | ||
218 | /** | |
219 | * __check_agg_selection_timer - check if the selection timer has expired | |
220 | * @port: the port we're looking at | |
221 | * | |
222 | */ | |
223 | static inline int __check_agg_selection_timer(struct port *port) | |
224 | { | |
225 | struct bonding *bond = __get_bond_by_port(port); | |
226 | ||
7bfc4753 | 227 | if (bond == NULL) |
1da177e4 | 228 | return 0; |
1da177e4 LT |
229 | |
230 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
231 | } | |
232 | ||
233 | /** | |
9ac3524a | 234 | * __get_state_machine_lock - lock the port's state machines |
1da177e4 LT |
235 | * @port: the port we're looking at |
236 | * | |
237 | */ | |
9ac3524a | 238 | static inline void __get_state_machine_lock(struct port *port) |
1da177e4 | 239 | { |
9ac3524a | 240 | spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
241 | } |
242 | ||
243 | /** | |
9ac3524a | 244 | * __release_state_machine_lock - unlock the port's state machines |
1da177e4 LT |
245 | * @port: the port we're looking at |
246 | * | |
247 | */ | |
9ac3524a | 248 | static inline void __release_state_machine_lock(struct port *port) |
1da177e4 | 249 | { |
9ac3524a | 250 | spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
251 | } |
252 | ||
253 | /** | |
254 | * __get_link_speed - get a port's speed | |
255 | * @port: the port we're looking at | |
256 | * | |
257 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
258 | * 0, | |
259 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
260 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
261 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
262 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
263 | */ |
264 | static u16 __get_link_speed(struct port *port) | |
265 | { | |
266 | struct slave *slave = port->slave; | |
267 | u16 speed; | |
268 | ||
269 | /* this if covers only a special case: when the configuration starts with | |
270 | * link down, it sets the speed to 0. | |
271 | * This is done in spite of the fact that the e100 driver reports 0 to be | |
272 | * compatible with MVT in the future.*/ | |
7bfc4753 | 273 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 274 | speed = 0; |
7bfc4753 | 275 | else { |
1da177e4 LT |
276 | switch (slave->speed) { |
277 | case SPEED_10: | |
278 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
279 | break; | |
280 | ||
281 | case SPEED_100: | |
282 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
283 | break; | |
284 | ||
285 | case SPEED_1000: | |
286 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
287 | break; | |
288 | ||
94dbffd5 JV |
289 | case SPEED_10000: |
290 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
291 | break; | |
292 | ||
1da177e4 LT |
293 | default: |
294 | speed = 0; // unknown speed value from ethtool. shouldn't happen | |
295 | break; | |
296 | } | |
297 | } | |
298 | ||
a4aee5c8 JP |
299 | pr_debug("Port %d Received link speed %d update from adapter\n", |
300 | port->actor_port_number, speed); | |
1da177e4 LT |
301 | return speed; |
302 | } | |
303 | ||
304 | /** | |
305 | * __get_duplex - get a port's duplex | |
306 | * @port: the port we're looking at | |
307 | * | |
308 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
309 | * 0x01 if in full duplex | |
310 | * 0x00 otherwise | |
311 | */ | |
312 | static u8 __get_duplex(struct port *port) | |
313 | { | |
314 | struct slave *slave = port->slave; | |
315 | ||
316 | u8 retval; | |
317 | ||
318 | // handling a special case: when the configuration starts with | |
319 | // link down, it sets the duplex to 0. | |
7bfc4753 | 320 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 321 | retval = 0x0; |
7bfc4753 | 322 | else { |
1da177e4 LT |
323 | switch (slave->duplex) { |
324 | case DUPLEX_FULL: | |
128ea6c3 | 325 | retval = 0x1; |
a4aee5c8 JP |
326 | pr_debug("Port %d Received status full duplex update from adapter\n", |
327 | port->actor_port_number); | |
1da177e4 LT |
328 | break; |
329 | case DUPLEX_HALF: | |
330 | default: | |
128ea6c3 | 331 | retval = 0x0; |
a4aee5c8 JP |
332 | pr_debug("Port %d Received status NOT full duplex update from adapter\n", |
333 | port->actor_port_number); | |
1da177e4 LT |
334 | break; |
335 | } | |
336 | } | |
337 | return retval; | |
338 | } | |
339 | ||
340 | /** | |
9ac3524a | 341 | * __initialize_port_locks - initialize a port's STATE machine spinlock |
e0809dbc | 342 | * @port: the slave of the port we're looking at |
1da177e4 LT |
343 | * |
344 | */ | |
e0809dbc | 345 | static inline void __initialize_port_locks(struct slave *slave) |
1da177e4 LT |
346 | { |
347 | // make sure it isn't called twice | |
e0809dbc | 348 | spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock)); |
1da177e4 LT |
349 | } |
350 | ||
351 | //conversions | |
1da177e4 LT |
352 | |
353 | /** | |
354 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
355 | * @timer_type: which timer to operate | |
356 | * @par: timer parameter. see below | |
357 | * | |
358 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
359 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
360 | * %SLOW_PERIODIC_TIME. | |
361 | */ | |
362 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
363 | { | |
128ea6c3 | 364 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
365 | |
366 | switch (timer_type) { | |
367 | case AD_CURRENT_WHILE_TIMER: // for rx machine usage | |
7bfc4753 | 368 | if (par) |
1da177e4 | 369 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout |
7bfc4753 | 370 | else |
1da177e4 | 371 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout |
1da177e4 LT |
372 | break; |
373 | case AD_ACTOR_CHURN_TIMER: // for local churn machine | |
374 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
375 | break; | |
376 | case AD_PERIODIC_TIMER: // for periodic machine | |
377 | retval = (par*ad_ticks_per_sec); // long timeout | |
378 | break; | |
379 | case AD_PARTNER_CHURN_TIMER: // for remote churn machine | |
380 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
381 | break; | |
382 | case AD_WAIT_WHILE_TIMER: // for selection machine | |
383 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
384 | break; | |
385 | } | |
386 | return retval; | |
387 | } | |
388 | ||
389 | ||
390 | ///////////////////////////////////////////////////////////////////////////////// | |
391 | // ================= ad_rx_machine helper functions ================== | |
392 | ///////////////////////////////////////////////////////////////////////////////// | |
393 | ||
2d6682db JV |
394 | /** |
395 | * __choose_matched - update a port's matched variable from a received lacpdu | |
396 | * @lacpdu: the lacpdu we've received | |
397 | * @port: the port we're looking at | |
398 | * | |
399 | * Update the value of the matched variable, using parameter values from a | |
400 | * newly received lacpdu. Parameter values for the partner carried in the | |
401 | * received PDU are compared with the corresponding operational parameter | |
402 | * values for the actor. Matched is set to TRUE if all of these parameters | |
403 | * match and the PDU parameter partner_state.aggregation has the same value as | |
404 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
405 | * in the aggregation. Matched is also set to TRUE if the value of | |
406 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
407 | * an individual link and lacp will actively maintain the link. Otherwise, | |
408 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
409 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
410 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
411 | * partner_state.lacp_activity variables are TRUE. | |
412 | * | |
413 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
414 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
415 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
416 | */ | |
417 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
418 | { | |
419 | // check if all parameters are alike | |
420 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && | |
421 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
422 | !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && | |
423 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && | |
424 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
425 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
426 | // or this is individual link(aggregation == FALSE) | |
427 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) | |
428 | ) { | |
429 | // update the state machine Matched variable | |
430 | port->sm_vars |= AD_PORT_MATCHED; | |
431 | } else { | |
432 | port->sm_vars &= ~AD_PORT_MATCHED; | |
433 | } | |
434 | } | |
435 | ||
1da177e4 LT |
436 | /** |
437 | * __record_pdu - record parameters from a received lacpdu | |
438 | * @lacpdu: the lacpdu we've received | |
439 | * @port: the port we're looking at | |
440 | * | |
441 | * Record the parameter values for the Actor carried in a received lacpdu as | |
442 | * the current partner operational parameter values and sets | |
443 | * actor_oper_port_state.defaulted to FALSE. | |
444 | */ | |
445 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
446 | { | |
1da177e4 | 447 | if (lacpdu && port) { |
b99d6ba9 HE |
448 | struct port_params *partner = &port->partner_oper; |
449 | ||
2d6682db | 450 | __choose_matched(lacpdu, port); |
1da177e4 | 451 | // record the new parameter values for the partner operational |
b99d6ba9 HE |
452 | partner->port_number = ntohs(lacpdu->actor_port); |
453 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
454 | partner->system = lacpdu->actor_system; | |
455 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
456 | partner->key = ntohs(lacpdu->actor_key); | |
457 | partner->port_state = lacpdu->actor_state; | |
1da177e4 LT |
458 | |
459 | // set actor_oper_port_state.defaulted to FALSE | |
460 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; | |
461 | ||
462 | // set the partner sync. to on if the partner is sync. and the port is matched | |
7bfc4753 BD |
463 | if ((port->sm_vars & AD_PORT_MATCHED) |
464 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 465 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 466 | else |
b99d6ba9 | 467 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
468 | } |
469 | } | |
470 | ||
471 | /** | |
472 | * __record_default - record default parameters | |
473 | * @port: the port we're looking at | |
474 | * | |
475 | * This function records the default parameter values for the partner carried | |
476 | * in the Partner Admin parameters as the current partner operational parameter | |
477 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
478 | */ | |
479 | static void __record_default(struct port *port) | |
480 | { | |
1da177e4 LT |
481 | if (port) { |
482 | // record the partner admin parameters | |
5eefd1ad HE |
483 | memcpy(&port->partner_oper, &port->partner_admin, |
484 | sizeof(struct port_params)); | |
1da177e4 LT |
485 | |
486 | // set actor_oper_port_state.defaulted to true | |
487 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; | |
488 | } | |
489 | } | |
490 | ||
491 | /** | |
492 | * __update_selected - update a port's Selected variable from a received lacpdu | |
493 | * @lacpdu: the lacpdu we've received | |
494 | * @port: the port we're looking at | |
495 | * | |
496 | * Update the value of the selected variable, using parameter values from a | |
497 | * newly received lacpdu. The parameter values for the Actor carried in the | |
498 | * received PDU are compared with the corresponding operational parameter | |
499 | * values for the ports partner. If one or more of the comparisons shows that | |
500 | * the value(s) received in the PDU differ from the current operational values, | |
501 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
502 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
503 | */ | |
504 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
505 | { | |
1da177e4 | 506 | if (lacpdu && port) { |
ce6a49ad HE |
507 | const struct port_params *partner = &port->partner_oper; |
508 | ||
1da177e4 | 509 | // check if any parameter is different |
8e95a202 JP |
510 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
511 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
512 | MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) || | |
513 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || | |
514 | ntohs(lacpdu->actor_key) != partner->key || | |
515 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
516 | // update the state machine Selected variable |
517 | port->sm_vars &= ~AD_PORT_SELECTED; | |
518 | } | |
519 | } | |
520 | } | |
521 | ||
522 | /** | |
523 | * __update_default_selected - update a port's Selected variable from Partner | |
524 | * @port: the port we're looking at | |
525 | * | |
526 | * This function updates the value of the selected variable, using the partner | |
527 | * administrative parameter values. The administrative values are compared with | |
528 | * the corresponding operational parameter values for the partner. If one or | |
529 | * more of the comparisons shows that the administrative value(s) differ from | |
530 | * the current operational values, then Selected is set to FALSE and | |
531 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
532 | * Selected remains unchanged. | |
533 | */ | |
534 | static void __update_default_selected(struct port *port) | |
535 | { | |
1da177e4 | 536 | if (port) { |
3c52065f HE |
537 | const struct port_params *admin = &port->partner_admin; |
538 | const struct port_params *oper = &port->partner_oper; | |
539 | ||
1da177e4 | 540 | // check if any parameter is different |
8e95a202 JP |
541 | if (admin->port_number != oper->port_number || |
542 | admin->port_priority != oper->port_priority || | |
543 | MAC_ADDRESS_COMPARE(&admin->system, &oper->system) || | |
544 | admin->system_priority != oper->system_priority || | |
545 | admin->key != oper->key || | |
546 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 547 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
548 | // update the state machine Selected variable |
549 | port->sm_vars &= ~AD_PORT_SELECTED; | |
550 | } | |
551 | } | |
552 | } | |
553 | ||
1da177e4 LT |
554 | /** |
555 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
556 | * @lacpdu: the lacpdu we've received | |
557 | * @port: the port we're looking at | |
558 | * | |
559 | * Updates the value of the ntt variable, using parameter values from a newly | |
560 | * received lacpdu. The parameter values for the partner carried in the | |
561 | * received PDU are compared with the corresponding operational parameter | |
562 | * values for the Actor. If one or more of the comparisons shows that the | |
563 | * value(s) received in the PDU differ from the current operational values, | |
564 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
565 | */ | |
566 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
567 | { | |
568 | // validate lacpdu and port | |
569 | if (lacpdu && port) { | |
570 | // check if any parameter is different | |
89cc76f9 JV |
571 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
572 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
1da177e4 | 573 | MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
574 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
575 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
576 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
577 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
578 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
579 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
580 | ) { | |
d238d458 HE |
581 | |
582 | port->ntt = true; | |
1da177e4 LT |
583 | } |
584 | } | |
585 | } | |
586 | ||
587 | /** | |
588 | * __attach_bond_to_agg | |
589 | * @port: the port we're looking at | |
590 | * | |
591 | * Handle the attaching of the port's control parser/multiplexer and the | |
592 | * aggregator. This function does nothing since the parser/multiplexer of the | |
593 | * receive and the parser/multiplexer of the aggregator are already combined. | |
594 | */ | |
595 | static void __attach_bond_to_agg(struct port *port) | |
596 | { | |
128ea6c3 | 597 | port = NULL; /* just to satisfy the compiler */ |
1da177e4 LT |
598 | // This function does nothing since the parser/multiplexer of the receive |
599 | // and the parser/multiplexer of the aggregator are already combined | |
600 | } | |
601 | ||
602 | /** | |
603 | * __detach_bond_from_agg | |
604 | * @port: the port we're looking at | |
605 | * | |
606 | * Handle the detaching of the port's control parser/multiplexer from the | |
607 | * aggregator. This function does nothing since the parser/multiplexer of the | |
608 | * receive and the parser/multiplexer of the aggregator are already combined. | |
609 | */ | |
610 | static void __detach_bond_from_agg(struct port *port) | |
611 | { | |
128ea6c3 | 612 | port = NULL; /* just to satisfy the compiler */ |
b9d6d2db | 613 | // This function does nothing since the parser/multiplexer of the receive |
1da177e4 LT |
614 | // and the parser/multiplexer of the aggregator are already combined |
615 | } | |
616 | ||
617 | /** | |
618 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
619 | * @aggregator: the aggregator we're looking at | |
620 | * | |
621 | */ | |
622 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
623 | { | |
624 | struct port *port; | |
625 | int retval = 1; | |
626 | ||
627 | if (aggregator) { | |
628 | // scan all ports in this aggregator to verfy if they are all ready | |
128ea6c3 BD |
629 | for (port = aggregator->lag_ports; |
630 | port; | |
631 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
632 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
633 | retval = 0; | |
634 | break; | |
635 | } | |
636 | } | |
637 | } | |
638 | ||
639 | return retval; | |
640 | } | |
641 | ||
642 | /** | |
643 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
644 | * @aggregator: the aggregator we're looking at | |
645 | * @val: Should the ports' ready bit be set on or off | |
646 | * | |
647 | */ | |
648 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
649 | { | |
650 | struct port *port; | |
651 | ||
128ea6c3 BD |
652 | for (port = aggregator->lag_ports; port; |
653 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 654 | if (val) |
1da177e4 | 655 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 656 | else |
1da177e4 | 657 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
658 | } |
659 | } | |
660 | ||
661 | /** | |
662 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
663 | * @aggregator: the aggregator we're looking at | |
664 | * | |
665 | */ | |
666 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
667 | { | |
128ea6c3 | 668 | u32 bandwidth = 0; |
1da177e4 LT |
669 | |
670 | if (aggregator->num_of_ports) { | |
65cce19c | 671 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
672 | case AD_LINK_SPEED_BITMASK_1MBPS: |
673 | bandwidth = aggregator->num_of_ports; | |
674 | break; | |
675 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
676 | bandwidth = aggregator->num_of_ports * 10; | |
677 | break; | |
678 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
679 | bandwidth = aggregator->num_of_ports * 100; | |
680 | break; | |
681 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
682 | bandwidth = aggregator->num_of_ports * 1000; | |
683 | break; | |
94dbffd5 JV |
684 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
685 | bandwidth = aggregator->num_of_ports * 10000; | |
686 | break; | |
1da177e4 | 687 | default: |
128ea6c3 | 688 | bandwidth = 0; /*to silence the compiler ....*/ |
1da177e4 LT |
689 | } |
690 | } | |
691 | return bandwidth; | |
692 | } | |
693 | ||
694 | /** | |
695 | * __get_active_agg - get the current active aggregator | |
696 | * @aggregator: the aggregator we're looking at | |
697 | * | |
698 | */ | |
699 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
700 | { | |
19177e7d VF |
701 | struct bonding *bond = aggregator->slave->bond; |
702 | struct list_head *iter; | |
703 | struct slave *slave; | |
1da177e4 | 704 | |
19177e7d VF |
705 | bond_for_each_slave(bond, slave, iter) |
706 | if (SLAVE_AD_INFO(slave).aggregator.is_active) | |
707 | return &(SLAVE_AD_INFO(slave).aggregator); | |
1da177e4 | 708 | |
19177e7d | 709 | return NULL; |
1da177e4 LT |
710 | } |
711 | ||
712 | /** | |
713 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
714 | * @port: the port we're looking at | |
715 | * | |
716 | */ | |
717 | static inline void __update_lacpdu_from_port(struct port *port) | |
718 | { | |
719 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 720 | const struct port_params *partner = &port->partner_oper; |
1da177e4 LT |
721 | |
722 | /* update current actual Actor parameters */ | |
723 | /* lacpdu->subtype initialized | |
724 | * lacpdu->version_number initialized | |
725 | * lacpdu->tlv_type_actor_info initialized | |
726 | * lacpdu->actor_information_length initialized | |
727 | */ | |
728 | ||
d3bb52b0 | 729 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 730 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
731 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
732 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
733 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
734 | lacpdu->actor_state = port->actor_oper_port_state; |
735 | ||
736 | /* lacpdu->reserved_3_1 initialized | |
737 | * lacpdu->tlv_type_partner_info initialized | |
738 | * lacpdu->partner_information_length initialized | |
739 | */ | |
740 | ||
3b5b35d0 HE |
741 | lacpdu->partner_system_priority = htons(partner->system_priority); |
742 | lacpdu->partner_system = partner->system; | |
743 | lacpdu->partner_key = htons(partner->key); | |
744 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
745 | lacpdu->partner_port = htons(partner->port_number); | |
746 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
747 | |
748 | /* lacpdu->reserved_3_2 initialized | |
749 | * lacpdu->tlv_type_collector_info initialized | |
750 | * lacpdu->collector_information_length initialized | |
751 | * collector_max_delay initialized | |
752 | * reserved_12[12] initialized | |
753 | * tlv_type_terminator initialized | |
754 | * terminator_length initialized | |
755 | * reserved_50[50] initialized | |
756 | */ | |
1da177e4 LT |
757 | } |
758 | ||
759 | ////////////////////////////////////////////////////////////////////////////////////// | |
760 | // ================= main 802.3ad protocol code ====================================== | |
761 | ////////////////////////////////////////////////////////////////////////////////////// | |
762 | ||
763 | /** | |
764 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
765 | * @port: the port we're looking at | |
766 | * | |
767 | * Returns: 0 on success | |
768 | * < 0 on error | |
769 | */ | |
770 | static int ad_lacpdu_send(struct port *port) | |
771 | { | |
772 | struct slave *slave = port->slave; | |
773 | struct sk_buff *skb; | |
774 | struct lacpdu_header *lacpdu_header; | |
775 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
776 | |
777 | skb = dev_alloc_skb(length); | |
7bfc4753 | 778 | if (!skb) |
1da177e4 | 779 | return -ENOMEM; |
1da177e4 LT |
780 | |
781 | skb->dev = slave->dev; | |
459a98ed | 782 | skb_reset_mac_header(skb); |
b0e380b1 | 783 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
784 | skb->protocol = PKT_TYPE_LACPDU; |
785 | skb->priority = TC_PRIO_CONTROL; | |
786 | ||
787 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
788 | ||
e727149e | 789 | memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 790 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 791 | because we use it to identify loopback lacpdus in receive. */ |
e727149e HE |
792 | memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
793 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
794 | |
795 | lacpdu_header->lacpdu = port->lacpdu; // struct copy | |
796 | ||
797 | dev_queue_xmit(skb); | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | /** | |
803 | * ad_marker_send - send marker information/response on a given port | |
804 | * @port: the port we're looking at | |
805 | * @marker: marker data to send | |
806 | * | |
807 | * Returns: 0 on success | |
808 | * < 0 on error | |
809 | */ | |
1c3f0b8e | 810 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
811 | { |
812 | struct slave *slave = port->slave; | |
813 | struct sk_buff *skb; | |
1c3f0b8e MD |
814 | struct bond_marker_header *marker_header; |
815 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
816 | |
817 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 818 | if (!skb) |
1da177e4 | 819 | return -ENOMEM; |
1da177e4 LT |
820 | |
821 | skb_reserve(skb, 16); | |
822 | ||
823 | skb->dev = slave->dev; | |
459a98ed | 824 | skb_reset_mac_header(skb); |
b0e380b1 | 825 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
826 | skb->protocol = PKT_TYPE_LACPDU; |
827 | ||
1c3f0b8e | 828 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 829 | |
e727149e | 830 | memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 831 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 832 | because we use it to identify loopback MARKERs in receive. */ |
e727149e HE |
833 | memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
834 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
835 | |
836 | marker_header->marker = *marker; // struct copy | |
837 | ||
838 | dev_queue_xmit(skb); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | /** | |
844 | * ad_mux_machine - handle a port's mux state machine | |
845 | * @port: the port we're looking at | |
846 | * | |
847 | */ | |
848 | static void ad_mux_machine(struct port *port) | |
849 | { | |
850 | mux_states_t last_state; | |
851 | ||
852 | // keep current State Machine state to compare later if it was changed | |
853 | last_state = port->sm_mux_state; | |
854 | ||
855 | if (port->sm_vars & AD_PORT_BEGIN) { | |
856 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
857 | } else { | |
858 | switch (port->sm_mux_state) { | |
859 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
860 | if ((port->sm_vars & AD_PORT_SELECTED) |
861 | || (port->sm_vars & AD_PORT_STANDBY)) | |
862 | /* if SELECTED or STANDBY */ | |
1da177e4 | 863 | port->sm_mux_state = AD_MUX_WAITING; // next state |
1da177e4 LT |
864 | break; |
865 | case AD_MUX_WAITING: | |
866 | // if SELECTED == FALSE return to DETACH state | |
867 | if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED | |
868 | port->sm_vars &= ~AD_PORT_READY_N; | |
869 | // in order to withhold the Selection Logic to check all ports READY_N value | |
870 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
871 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
872 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
873 | break; | |
874 | } | |
875 | ||
876 | // check if the wait_while_timer expired | |
7bfc4753 BD |
877 | if (port->sm_mux_timer_counter |
878 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 879 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 LT |
880 | |
881 | // in order to withhold the selection logic to check all ports READY_N value | |
882 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
883 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
884 | ||
885 | // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state | |
7bfc4753 BD |
886 | if ((port->sm_vars & AD_PORT_READY) |
887 | && !port->sm_mux_timer_counter) | |
1da177e4 | 888 | port->sm_mux_state = AD_MUX_ATTACHED; // next state |
1da177e4 LT |
889 | break; |
890 | case AD_MUX_ATTACHED: | |
891 | // check also if agg_select_timer expired(so the edable port will take place only after this timer) | |
1055c9ab | 892 | if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { |
1da177e4 LT |
893 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state |
894 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY | |
895 | port->sm_vars &= ~AD_PORT_READY_N; | |
896 | // in order to withhold the selection logic to check all ports READY_N value | |
897 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
898 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
899 | port->sm_mux_state = AD_MUX_DETACHED;// next state | |
900 | } | |
901 | break; | |
902 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
903 | if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || | |
1055c9ab | 904 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) |
1da177e4 LT |
905 | ) { |
906 | port->sm_mux_state = AD_MUX_ATTACHED;// next state | |
907 | ||
908 | } else { | |
909 | // if port state hasn't changed make | |
910 | // sure that a collecting distributing | |
911 | // port in an active aggregator is enabled | |
912 | if (port->aggregator && | |
913 | port->aggregator->is_active && | |
914 | !__port_is_enabled(port)) { | |
915 | ||
916 | __enable_port(port); | |
917 | } | |
918 | } | |
919 | break; | |
920 | default: //to silence the compiler | |
921 | break; | |
922 | } | |
923 | } | |
924 | ||
925 | // check if the state machine was changed | |
926 | if (port->sm_mux_state != last_state) { | |
a4aee5c8 JP |
927 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
928 | port->actor_port_number, last_state, | |
929 | port->sm_mux_state); | |
1da177e4 LT |
930 | switch (port->sm_mux_state) { |
931 | case AD_MUX_DETACHED: | |
932 | __detach_bond_from_agg(port); | |
933 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
934 | ad_disable_collecting_distributing(port); | |
935 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
936 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 937 | port->ntt = true; |
1da177e4 LT |
938 | break; |
939 | case AD_MUX_WAITING: | |
940 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
941 | break; | |
942 | case AD_MUX_ATTACHED: | |
943 | __attach_bond_to_agg(port); | |
944 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
945 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
946 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
947 | ad_disable_collecting_distributing(port); | |
d238d458 | 948 | port->ntt = true; |
1da177e4 LT |
949 | break; |
950 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
951 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
952 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
953 | ad_enable_collecting_distributing(port); | |
d238d458 | 954 | port->ntt = true; |
1da177e4 LT |
955 | break; |
956 | default: //to silence the compiler | |
957 | break; | |
958 | } | |
959 | } | |
960 | } | |
961 | ||
962 | /** | |
963 | * ad_rx_machine - handle a port's rx State Machine | |
964 | * @lacpdu: the lacpdu we've received | |
965 | * @port: the port we're looking at | |
966 | * | |
967 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
968 | * CURRENT. If timer expired set the state machine in the proper state. | |
969 | * In other cases, this function checks if we need to switch to other state. | |
970 | */ | |
971 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
972 | { | |
973 | rx_states_t last_state; | |
974 | ||
1da177e4 LT |
975 | // keep current State Machine state to compare later if it was changed |
976 | last_state = port->sm_rx_state; | |
977 | ||
978 | // check if state machine should change state | |
979 | // first, check if port was reinitialized | |
7bfc4753 BD |
980 | if (port->sm_vars & AD_PORT_BEGIN) |
981 | /* next state */ | |
982 | port->sm_rx_state = AD_RX_INITIALIZE; | |
1da177e4 | 983 | // check if port is not enabled |
7bfc4753 BD |
984 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
985 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
986 | /* next state */ | |
987 | port->sm_rx_state = AD_RX_PORT_DISABLED; | |
1da177e4 LT |
988 | // check if new lacpdu arrived |
989 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { | |
990 | port->sm_rx_timer_counter = 0; // zero timer | |
991 | port->sm_rx_state = AD_RX_CURRENT; | |
992 | } else { | |
993 | // if timer is on, and if it is expired | |
994 | if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { | |
995 | switch (port->sm_rx_state) { | |
996 | case AD_RX_EXPIRED: | |
997 | port->sm_rx_state = AD_RX_DEFAULTED; // next state | |
998 | break; | |
999 | case AD_RX_CURRENT: | |
1000 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1001 | break; | |
1002 | default: //to silence the compiler | |
1003 | break; | |
1004 | } | |
1005 | } else { | |
1006 | // if no lacpdu arrived and no timer is on | |
1007 | switch (port->sm_rx_state) { | |
1008 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 1009 | if (port->sm_vars & AD_PORT_MOVED) |
1da177e4 | 1010 | port->sm_rx_state = AD_RX_INITIALIZE; // next state |
7bfc4753 BD |
1011 | else if (port->is_enabled |
1012 | && (port->sm_vars | |
1013 | & AD_PORT_LACP_ENABLED)) | |
1da177e4 | 1014 | port->sm_rx_state = AD_RX_EXPIRED; // next state |
7bfc4753 BD |
1015 | else if (port->is_enabled |
1016 | && ((port->sm_vars | |
1017 | & AD_PORT_LACP_ENABLED) == 0)) | |
1da177e4 | 1018 | port->sm_rx_state = AD_RX_LACP_DISABLED; // next state |
1da177e4 LT |
1019 | break; |
1020 | default: //to silence the compiler | |
1021 | break; | |
1022 | ||
1023 | } | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | // check if the State machine was changed or new lacpdu arrived | |
1028 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
a4aee5c8 JP |
1029 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1030 | port->actor_port_number, last_state, | |
1031 | port->sm_rx_state); | |
1da177e4 LT |
1032 | switch (port->sm_rx_state) { |
1033 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1034 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1035 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1036 | else |
1da177e4 | 1037 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1038 | port->sm_vars &= ~AD_PORT_SELECTED; |
1039 | __record_default(port); | |
1040 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1041 | port->sm_vars &= ~AD_PORT_MOVED; | |
1042 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1043 | ||
1044 | /*- Fall Through -*/ | |
1045 | ||
1046 | case AD_RX_PORT_DISABLED: | |
1047 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1048 | break; | |
1049 | case AD_RX_LACP_DISABLED: | |
1050 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1051 | __record_default(port); | |
1055c9ab | 1052 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1053 | port->sm_vars |= AD_PORT_MATCHED; |
1054 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1055 | break; | |
1056 | case AD_RX_EXPIRED: | |
1057 | //Reset of the Synchronization flag. (Standard 43.4.12) | |
1058 | //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the | |
1059 | //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. | |
1055c9ab | 1060 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1061 | port->sm_vars &= ~AD_PORT_MATCHED; |
8e321c4f JL |
1062 | port->partner_oper.port_state |= |
1063 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 LT |
1064 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1065 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1066 | break; | |
1067 | case AD_RX_DEFAULTED: | |
1068 | __update_default_selected(port); | |
1069 | __record_default(port); | |
1070 | port->sm_vars |= AD_PORT_MATCHED; | |
1071 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1072 | break; | |
1073 | case AD_RX_CURRENT: | |
1074 | // detect loopback situation | |
1075 | if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { | |
1076 | // INFO_RECEIVED_LOOPBACK_FRAMES | |
a4aee5c8 JP |
1077 | pr_err("%s: An illegal loopback occurred on adapter (%s).\n" |
1078 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", | |
471cb5a3 | 1079 | port->slave->bond->dev->name, port->slave->dev->name); |
1da177e4 LT |
1080 | return; |
1081 | } | |
1082 | __update_selected(lacpdu, port); | |
1083 | __update_ntt(lacpdu, port); | |
1084 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1085 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1086 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 LT |
1087 | break; |
1088 | default: //to silence the compiler | |
1089 | break; | |
1090 | } | |
1091 | } | |
1da177e4 LT |
1092 | } |
1093 | ||
1094 | /** | |
1095 | * ad_tx_machine - handle a port's tx state machine | |
1096 | * @port: the port we're looking at | |
1097 | * | |
1098 | */ | |
1099 | static void ad_tx_machine(struct port *port) | |
1100 | { | |
1101 | // check if tx timer expired, to verify that we do not send more than 3 packets per second | |
1102 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1103 | // check if there is something to send | |
1104 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1105 | __update_lacpdu_from_port(port); | |
d238d458 | 1106 | |
1da177e4 | 1107 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1108 | pr_debug("Sent LACPDU on port %d\n", |
1109 | port->actor_port_number); | |
d238d458 HE |
1110 | |
1111 | /* mark ntt as false, so it will not be sent again until | |
1112 | demanded */ | |
1113 | port->ntt = false; | |
1da177e4 LT |
1114 | } |
1115 | } | |
1116 | // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND | |
128ea6c3 BD |
1117 | port->sm_tx_timer_counter = |
1118 | ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1119 | } |
1120 | } | |
1121 | ||
1122 | /** | |
1123 | * ad_periodic_machine - handle a port's periodic state machine | |
1124 | * @port: the port we're looking at | |
1125 | * | |
1126 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1127 | */ | |
1128 | static void ad_periodic_machine(struct port *port) | |
1129 | { | |
1130 | periodic_states_t last_state; | |
1131 | ||
1132 | // keep current state machine state to compare later if it was changed | |
1133 | last_state = port->sm_periodic_state; | |
1134 | ||
1135 | // check if port was reinitialized | |
1136 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || | |
1055c9ab | 1137 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 LT |
1138 | ) { |
1139 | port->sm_periodic_state = AD_NO_PERIODIC; // next state | |
1140 | } | |
1141 | // check if state machine should change state | |
1142 | else if (port->sm_periodic_timer_counter) { | |
1143 | // check if periodic state machine expired | |
1144 | if (!(--port->sm_periodic_timer_counter)) { | |
1145 | // if expired then do tx | |
1146 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1147 | } else { | |
1148 | // If not expired, check if there is some new timeout parameter from the partner state | |
1149 | switch (port->sm_periodic_state) { | |
1150 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1151 | if (!(port->partner_oper.port_state |
1152 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1153 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
1da177e4 LT |
1154 | break; |
1155 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1156 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 LT |
1157 | // stop current timer |
1158 | port->sm_periodic_timer_counter = 0; | |
1159 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1160 | } | |
1161 | break; | |
1162 | default: //to silence the compiler | |
1163 | break; | |
1164 | } | |
1165 | } | |
1166 | } else { | |
1167 | switch (port->sm_periodic_state) { | |
1168 | case AD_NO_PERIODIC: | |
1169 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1170 | break; | |
1171 | case AD_PERIODIC_TX: | |
7bfc4753 BD |
1172 | if (!(port->partner_oper.port_state |
1173 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1174 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
7bfc4753 | 1175 | else |
1da177e4 | 1176 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state |
1da177e4 LT |
1177 | break; |
1178 | default: //to silence the compiler | |
1179 | break; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | // check if the state machine was changed | |
1184 | if (port->sm_periodic_state != last_state) { | |
a4aee5c8 JP |
1185 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1186 | port->actor_port_number, last_state, | |
1187 | port->sm_periodic_state); | |
1da177e4 LT |
1188 | switch (port->sm_periodic_state) { |
1189 | case AD_NO_PERIODIC: | |
1190 | port->sm_periodic_timer_counter = 0; // zero timer | |
1191 | break; | |
1192 | case AD_FAST_PERIODIC: | |
1193 | 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 | |
1194 | break; | |
1195 | case AD_SLOW_PERIODIC: | |
1196 | 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 | |
1197 | break; | |
1198 | case AD_PERIODIC_TX: | |
d238d458 | 1199 | port->ntt = true; |
1da177e4 LT |
1200 | break; |
1201 | default: //to silence the compiler | |
1202 | break; | |
1203 | } | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | /** | |
1208 | * ad_port_selection_logic - select aggregation groups | |
1209 | * @port: the port we're looking at | |
1210 | * | |
1211 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1212 | * selection logic is called in the inititalization (after all the handshkes), | |
1213 | * and after every lacpdu receive (if selected is off). | |
1214 | */ | |
1215 | static void ad_port_selection_logic(struct port *port) | |
1216 | { | |
1217 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1218 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1219 | struct list_head *iter; |
1220 | struct bonding *bond; | |
1221 | struct slave *slave; | |
1da177e4 LT |
1222 | int found = 0; |
1223 | ||
1224 | // if the port is already Selected, do nothing | |
7bfc4753 | 1225 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1226 | return; |
1da177e4 | 1227 | |
3e36bb75 VF |
1228 | bond = __get_bond_by_port(port); |
1229 | ||
1da177e4 LT |
1230 | // if the port is connected to other aggregator, detach it |
1231 | if (port->aggregator) { | |
1232 | // detach the port from its former aggregator | |
128ea6c3 BD |
1233 | temp_aggregator = port->aggregator; |
1234 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1235 | last_port = curr_port, | |
1236 | curr_port = curr_port->next_port_in_aggregator) { | |
1da177e4 LT |
1237 | if (curr_port == port) { |
1238 | temp_aggregator->num_of_ports--; | |
1239 | if (!last_port) {// if it is the first port attached to the aggregator | |
128ea6c3 BD |
1240 | temp_aggregator->lag_ports = |
1241 | port->next_port_in_aggregator; | |
1da177e4 | 1242 | } else {// not the first port attached to the aggregator |
128ea6c3 BD |
1243 | last_port->next_port_in_aggregator = |
1244 | port->next_port_in_aggregator; | |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | // clear the port's relations to this aggregator | |
1248 | port->aggregator = NULL; | |
128ea6c3 BD |
1249 | port->next_port_in_aggregator = NULL; |
1250 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1251 | |
a4aee5c8 JP |
1252 | pr_debug("Port %d left LAG %d\n", |
1253 | port->actor_port_number, | |
1254 | temp_aggregator->aggregator_identifier); | |
1da177e4 | 1255 | // if the aggregator is empty, clear its parameters, and set it ready to be attached |
7bfc4753 | 1256 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1257 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1258 | break; |
1259 | } | |
1260 | } | |
1261 | if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list | |
a4aee5c8 | 1262 | pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
471cb5a3 | 1263 | port->slave->bond->dev->name, |
e5e2a8fd JP |
1264 | port->actor_port_number, |
1265 | port->slave->dev->name, | |
1266 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1267 | } |
1268 | } | |
1269 | // search on all aggregators for a suitable aggregator for this port | |
3e36bb75 VF |
1270 | bond_for_each_slave(bond, slave, iter) { |
1271 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1da177e4 LT |
1272 | |
1273 | // keep a free aggregator for later use(if needed) | |
1274 | if (!aggregator->lag_ports) { | |
7bfc4753 | 1275 | if (!free_aggregator) |
128ea6c3 | 1276 | free_aggregator = aggregator; |
1da177e4 LT |
1277 | continue; |
1278 | } | |
1279 | // check if current aggregator suits us | |
1280 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND | |
1055c9ab HE |
1281 | !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && |
1282 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && | |
1283 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1284 | ) && |
1055c9ab | 1285 | ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers |
1da177e4 LT |
1286 | !aggregator->is_individual) // but is not individual OR |
1287 | ) | |
1288 | ) { | |
1289 | // attach to the founded aggregator | |
1290 | port->aggregator = aggregator; | |
128ea6c3 BD |
1291 | port->actor_port_aggregator_identifier = |
1292 | port->aggregator->aggregator_identifier; | |
1293 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1294 | port->aggregator->num_of_ports++; |
128ea6c3 | 1295 | aggregator->lag_ports = port; |
a4aee5c8 JP |
1296 | pr_debug("Port %d joined LAG %d(existing LAG)\n", |
1297 | port->actor_port_number, | |
1298 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1299 | |
1300 | // mark this port as selected | |
1301 | port->sm_vars |= AD_PORT_SELECTED; | |
1302 | found = 1; | |
1303 | break; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | // the port couldn't find an aggregator - attach it to a new aggregator | |
1308 | if (!found) { | |
1309 | if (free_aggregator) { | |
1310 | // assign port a new aggregator | |
1311 | port->aggregator = free_aggregator; | |
128ea6c3 BD |
1312 | port->actor_port_aggregator_identifier = |
1313 | port->aggregator->aggregator_identifier; | |
1da177e4 LT |
1314 | |
1315 | // update the new aggregator's parameters | |
1316 | // if port was responsed from the end-user | |
7bfc4753 BD |
1317 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1318 | /* if port is full duplex */ | |
1624db7b | 1319 | port->aggregator->is_individual = false; |
7bfc4753 | 1320 | else |
1624db7b | 1321 | port->aggregator->is_individual = true; |
1da177e4 LT |
1322 | |
1323 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1324 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1325 | port->aggregator->partner_system = |
1326 | port->partner_oper.system; | |
1327 | port->aggregator->partner_system_priority = | |
1328 | port->partner_oper.system_priority; | |
1055c9ab | 1329 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1330 | port->aggregator->receive_state = 1; |
1331 | port->aggregator->transmit_state = 1; | |
1332 | port->aggregator->lag_ports = port; | |
1333 | port->aggregator->num_of_ports++; | |
1334 | ||
1335 | // mark this port as selected | |
1336 | port->sm_vars |= AD_PORT_SELECTED; | |
1337 | ||
a4aee5c8 JP |
1338 | pr_debug("Port %d joined LAG %d(new LAG)\n", |
1339 | port->actor_port_number, | |
1340 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1341 | } else { |
a4aee5c8 | 1342 | pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", |
471cb5a3 | 1343 | port->slave->bond->dev->name, |
1da177e4 LT |
1344 | port->actor_port_number, port->slave->dev->name); |
1345 | } | |
1346 | } | |
1347 | // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports | |
1348 | // else set ready=FALSE in all aggregator's ports | |
1349 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1350 | ||
fd989c83 JV |
1351 | aggregator = __get_first_agg(port); |
1352 | ad_agg_selection_logic(aggregator); | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * Decide if "agg" is a better choice for the new active aggregator that | |
1357 | * the current best, according to the ad_select policy. | |
1358 | */ | |
1359 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1360 | struct aggregator *curr) | |
1361 | { | |
1362 | /* | |
1363 | * 0. If no best, select current. | |
1364 | * | |
1365 | * 1. If the current agg is not individual, and the best is | |
1366 | * individual, select current. | |
1367 | * | |
1368 | * 2. If current agg is individual and the best is not, keep best. | |
1369 | * | |
1370 | * 3. Therefore, current and best are both individual or both not | |
1371 | * individual, so: | |
1372 | * | |
1373 | * 3a. If current agg partner replied, and best agg partner did not, | |
1374 | * select current. | |
1375 | * | |
1376 | * 3b. If current agg partner did not reply and best agg partner | |
1377 | * did reply, keep best. | |
1378 | * | |
1379 | * 4. Therefore, current and best both have partner replies or | |
1380 | * both do not, so perform selection policy: | |
1381 | * | |
1382 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1383 | * select by bandwidth. | |
1384 | * | |
1385 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1386 | */ | |
1387 | if (!best) | |
1388 | return curr; | |
1389 | ||
1390 | if (!curr->is_individual && best->is_individual) | |
1391 | return curr; | |
1392 | ||
1393 | if (curr->is_individual && !best->is_individual) | |
1394 | return best; | |
1395 | ||
1396 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1397 | return curr; | |
1398 | ||
1399 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1400 | return best; | |
1401 | ||
1402 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1403 | case BOND_AD_COUNT: | |
1404 | if (curr->num_of_ports > best->num_of_ports) | |
1405 | return curr; | |
1406 | ||
1407 | if (curr->num_of_ports < best->num_of_ports) | |
1408 | return best; | |
1409 | ||
1410 | /*FALLTHROUGH*/ | |
1411 | case BOND_AD_STABLE: | |
1412 | case BOND_AD_BANDWIDTH: | |
1413 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1414 | return curr; | |
1415 | ||
1416 | break; | |
1417 | ||
1418 | default: | |
a4aee5c8 | 1419 | pr_warning("%s: Impossible agg select mode %d\n", |
471cb5a3 | 1420 | curr->slave->bond->dev->name, |
e5e2a8fd | 1421 | __get_agg_selection_mode(curr->lag_ports)); |
fd989c83 | 1422 | break; |
1da177e4 | 1423 | } |
fd989c83 JV |
1424 | |
1425 | return best; | |
1da177e4 LT |
1426 | } |
1427 | ||
4cd6fe1c SH |
1428 | static int agg_device_up(const struct aggregator *agg) |
1429 | { | |
2430af8b JB |
1430 | struct port *port = agg->lag_ports; |
1431 | if (!port) | |
1432 | return 0; | |
1433 | return (netif_running(port->slave->dev) && | |
1434 | netif_carrier_ok(port->slave->dev)); | |
4cd6fe1c SH |
1435 | } |
1436 | ||
1da177e4 LT |
1437 | /** |
1438 | * ad_agg_selection_logic - select an aggregation group for a team | |
1439 | * @aggregator: the aggregator we're looking at | |
1440 | * | |
1441 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1442 | * |
1443 | * The logic of this function is to select the aggregator according to | |
1444 | * the ad_select policy: | |
1445 | * | |
1446 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1447 | * it, and to reselect the active aggregator only if the previous | |
1448 | * aggregator has no more ports related to it. | |
1449 | * | |
1450 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1451 | * bandwidth, and reselect whenever a link state change takes place or the | |
1452 | * set of slaves in the bond changes. | |
1453 | * | |
1454 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1455 | * (slaves), and reselect whenever a link state change takes place or the | |
1456 | * set of slaves in the bond changes. | |
1da177e4 LT |
1457 | * |
1458 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1459 | * __get_active_agg() won't work correctly. This function should be better | |
1460 | * called with the bond itself, and retrieve the first agg from it. | |
1461 | */ | |
fd989c83 | 1462 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1463 | { |
fd989c83 | 1464 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1465 | struct bonding *bond = agg->slave->bond; |
1466 | struct list_head *iter; | |
1467 | struct slave *slave; | |
1da177e4 | 1468 | struct port *port; |
1da177e4 | 1469 | |
fd989c83 | 1470 | origin = agg; |
fd989c83 | 1471 | active = __get_active_agg(agg); |
4cd6fe1c | 1472 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1473 | |
bef1fcce VF |
1474 | bond_for_each_slave(bond, slave, iter) { |
1475 | agg = &(SLAVE_AD_INFO(slave).aggregator); | |
1476 | ||
fd989c83 JV |
1477 | agg->is_active = 0; |
1478 | ||
4cd6fe1c | 1479 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1480 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1481 | } |
fd989c83 JV |
1482 | |
1483 | if (best && | |
1484 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
1485 | /* | |
1486 | * For the STABLE policy, don't replace the old active | |
1487 | * aggregator if it's still active (it has an answering | |
1488 | * partner) or if both the best and active don't have an | |
1489 | * answering partner. | |
1490 | */ | |
1491 | if (active && active->lag_ports && | |
1492 | active->lag_ports->is_enabled && | |
1493 | (__agg_has_partner(active) || | |
1494 | (!__agg_has_partner(active) && !__agg_has_partner(best)))) { | |
1495 | if (!(!active->actor_oper_aggregator_key && | |
1496 | best->actor_oper_aggregator_key)) { | |
1497 | best = NULL; | |
1498 | active->is_active = 1; | |
1da177e4 LT |
1499 | } |
1500 | } | |
fd989c83 | 1501 | } |
1da177e4 | 1502 | |
fd989c83 JV |
1503 | if (best && (best == active)) { |
1504 | best = NULL; | |
1505 | active->is_active = 1; | |
1da177e4 LT |
1506 | } |
1507 | ||
1508 | // if there is new best aggregator, activate it | |
fd989c83 | 1509 | if (best) { |
5a03cdb7 | 1510 | pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1511 | best->aggregator_identifier, best->num_of_ports, |
1512 | best->actor_oper_aggregator_key, | |
1513 | best->partner_oper_aggregator_key, | |
1514 | best->is_individual, best->is_active); | |
5a03cdb7 | 1515 | pr_debug("best ports %p slave %p %s\n", |
a4aee5c8 JP |
1516 | best->lag_ports, best->slave, |
1517 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1518 | |
bef1fcce VF |
1519 | bond_for_each_slave(bond, slave, iter) { |
1520 | agg = &(SLAVE_AD_INFO(slave).aggregator); | |
fd989c83 | 1521 | |
5a03cdb7 | 1522 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1523 | agg->aggregator_identifier, agg->num_of_ports, |
1524 | agg->actor_oper_aggregator_key, | |
1525 | agg->partner_oper_aggregator_key, | |
1526 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | // check if any partner replys | |
fd989c83 | 1530 | if (best->is_individual) { |
a4aee5c8 | 1531 | pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
471cb5a3 | 1532 | best->slave ? best->slave->bond->dev->name : "NULL"); |
1da177e4 LT |
1533 | } |
1534 | ||
fd989c83 | 1535 | best->is_active = 1; |
5a03cdb7 | 1536 | pr_debug("LAG %d chosen as the active LAG\n", |
a4aee5c8 | 1537 | best->aggregator_identifier); |
5a03cdb7 | 1538 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1539 | best->aggregator_identifier, best->num_of_ports, |
1540 | best->actor_oper_aggregator_key, | |
1541 | best->partner_oper_aggregator_key, | |
1542 | best->is_individual, best->is_active); | |
1da177e4 LT |
1543 | |
1544 | // disable the ports that were related to the former active_aggregator | |
fd989c83 JV |
1545 | if (active) { |
1546 | for (port = active->lag_ports; port; | |
1547 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1548 | __disable_port(port); |
1549 | } | |
1550 | } | |
1551 | } | |
1552 | ||
fd989c83 JV |
1553 | /* |
1554 | * if the selected aggregator is of join individuals | |
1555 | * (partner_system is NULL), enable their ports | |
1556 | */ | |
1557 | active = __get_active_agg(origin); | |
1da177e4 | 1558 | |
fd989c83 JV |
1559 | if (active) { |
1560 | if (!__agg_has_partner(active)) { | |
1561 | for (port = active->lag_ports; port; | |
1562 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1563 | __enable_port(port); |
1564 | } | |
1565 | } | |
1566 | } | |
fd989c83 | 1567 | |
bef1fcce | 1568 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1569 | } |
1570 | ||
1571 | /** | |
1572 | * ad_clear_agg - clear a given aggregator's parameters | |
1573 | * @aggregator: the aggregator we're looking at | |
1574 | * | |
1575 | */ | |
1576 | static void ad_clear_agg(struct aggregator *aggregator) | |
1577 | { | |
1578 | if (aggregator) { | |
1624db7b | 1579 | aggregator->is_individual = false; |
1da177e4 LT |
1580 | aggregator->actor_admin_aggregator_key = 0; |
1581 | aggregator->actor_oper_aggregator_key = 0; | |
1582 | aggregator->partner_system = null_mac_addr; | |
1583 | aggregator->partner_system_priority = 0; | |
1584 | aggregator->partner_oper_aggregator_key = 0; | |
1585 | aggregator->receive_state = 0; | |
1586 | aggregator->transmit_state = 0; | |
1587 | aggregator->lag_ports = NULL; | |
1588 | aggregator->is_active = 0; | |
1589 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1590 | pr_debug("LAG %d was cleared\n", |
1591 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1592 | } |
1593 | } | |
1594 | ||
1595 | /** | |
1596 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1597 | * @aggregator: the aggregator we're looking at | |
1598 | * | |
1599 | */ | |
1600 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1601 | { | |
1602 | if (aggregator) { | |
1603 | ad_clear_agg(aggregator); | |
1604 | ||
1605 | aggregator->aggregator_mac_address = null_mac_addr; | |
1606 | aggregator->aggregator_identifier = 0; | |
1607 | aggregator->slave = NULL; | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | /** | |
1612 | * ad_initialize_port - initialize a given port's parameters | |
1613 | * @aggregator: the aggregator we're looking at | |
1614 | * @lacp_fast: boolean. whether fast periodic should be used | |
1615 | * | |
1616 | */ | |
1617 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1618 | { | |
c7e703d0 HE |
1619 | static const struct port_params tmpl = { |
1620 | .system_priority = 0xffff, | |
1621 | .key = 1, | |
1622 | .port_number = 1, | |
1623 | .port_priority = 0xff, | |
1624 | .port_state = 1, | |
1625 | }; | |
7addeef6 HE |
1626 | static const struct lacpdu lacpdu = { |
1627 | .subtype = 0x01, | |
1628 | .version_number = 0x01, | |
1629 | .tlv_type_actor_info = 0x01, | |
1630 | .actor_information_length = 0x14, | |
1631 | .tlv_type_partner_info = 0x02, | |
1632 | .partner_information_length = 0x14, | |
1633 | .tlv_type_collector_info = 0x03, | |
1634 | .collector_information_length = 0x10, | |
1635 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1636 | }; | |
c7e703d0 | 1637 | |
1da177e4 LT |
1638 | if (port) { |
1639 | port->actor_port_number = 1; | |
1640 | port->actor_port_priority = 0xff; | |
1641 | port->actor_system = null_mac_addr; | |
1642 | port->actor_system_priority = 0xffff; | |
1643 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1644 | port->ntt = false; |
1da177e4 LT |
1645 | port->actor_admin_port_key = 1; |
1646 | port->actor_oper_port_key = 1; | |
1647 | port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1648 | port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1649 | ||
7bfc4753 | 1650 | if (lacp_fast) |
1da177e4 | 1651 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1652 | |
c7e703d0 HE |
1653 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1654 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1655 | ||
f48127b6 | 1656 | port->is_enabled = true; |
1da177e4 LT |
1657 | // ****** private parameters ****** |
1658 | port->sm_vars = 0x3; | |
1659 | port->sm_rx_state = 0; | |
1660 | port->sm_rx_timer_counter = 0; | |
1661 | port->sm_periodic_state = 0; | |
1662 | port->sm_periodic_timer_counter = 0; | |
1663 | port->sm_mux_state = 0; | |
1664 | port->sm_mux_timer_counter = 0; | |
1665 | port->sm_tx_state = 0; | |
1666 | port->sm_tx_timer_counter = 0; | |
1667 | port->slave = NULL; | |
1668 | port->aggregator = NULL; | |
1669 | port->next_port_in_aggregator = NULL; | |
1670 | port->transaction_id = 0; | |
1671 | ||
7addeef6 | 1672 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1673 | } |
1674 | } | |
1675 | ||
1676 | /** | |
1677 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1678 | * @port: the port we're looking at | |
1679 | * | |
1680 | * Enable @port if it's in an active aggregator | |
1681 | */ | |
1682 | static void ad_enable_collecting_distributing(struct port *port) | |
1683 | { | |
1684 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1685 | pr_debug("Enabling port %d(LAG %d)\n", |
1686 | port->actor_port_number, | |
1687 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1688 | __enable_port(port); |
1689 | } | |
1690 | } | |
1691 | ||
1692 | /** | |
1693 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1694 | * @port: the port we're looking at | |
1695 | * | |
1696 | */ | |
1697 | static void ad_disable_collecting_distributing(struct port *port) | |
1698 | { | |
1699 | if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { | |
a4aee5c8 JP |
1700 | pr_debug("Disabling port %d(LAG %d)\n", |
1701 | port->actor_port_number, | |
1702 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1703 | __disable_port(port); |
1704 | } | |
1705 | } | |
1706 | ||
1707 | #if 0 | |
1708 | /** | |
1709 | * ad_marker_info_send - send a marker information frame | |
1710 | * @port: the port we're looking at | |
1711 | * | |
1712 | * This function does nothing since we decided not to implement send and handle | |
1713 | * response for marker PDU's, in this stage, but only to respond to marker | |
1714 | * information. | |
1715 | */ | |
1716 | static void ad_marker_info_send(struct port *port) | |
1717 | { | |
1c3f0b8e | 1718 | struct bond_marker marker; |
1da177e4 LT |
1719 | u16 index; |
1720 | ||
1721 | // fill the marker PDU with the appropriate values | |
1722 | marker.subtype = 0x02; | |
1723 | marker.version_number = 0x01; | |
1724 | marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; | |
1725 | marker.marker_length = 0x16; | |
1726 | // convert requester_port to Big Endian | |
1727 | marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); | |
1728 | marker.requester_system = port->actor_system; | |
1729 | // convert requester_port(u32) to Big Endian | |
128ea6c3 BD |
1730 | marker.requester_transaction_id = |
1731 | (((++port->transaction_id & 0xFF) << 24) | |
1732 | | ((port->transaction_id & 0xFF00) << 8) | |
1733 | | ((port->transaction_id & 0xFF0000) >> 8) | |
1734 | | ((port->transaction_id & 0xFF000000) >> 24)); | |
1da177e4 LT |
1735 | marker.pad = 0; |
1736 | marker.tlv_type_terminator = 0x00; | |
1737 | marker.terminator_length = 0x00; | |
128ea6c3 BD |
1738 | for (index = 0; index < 90; index++) |
1739 | marker.reserved_90[index] = 0; | |
1da177e4 LT |
1740 | |
1741 | // send the marker information | |
1742 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1743 | pr_debug("Sent Marker Information on port %d\n", |
1744 | port->actor_port_number); | |
1da177e4 LT |
1745 | } |
1746 | } | |
1747 | #endif | |
1748 | ||
1749 | /** | |
1750 | * ad_marker_info_received - handle receive of a Marker information frame | |
1751 | * @marker_info: Marker info received | |
1752 | * @port: the port we're looking at | |
1753 | * | |
1754 | */ | |
1c3f0b8e MD |
1755 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1756 | struct port *port) | |
1da177e4 | 1757 | { |
1c3f0b8e | 1758 | struct bond_marker marker; |
1da177e4 LT |
1759 | |
1760 | // copy the received marker data to the response marker | |
1761 | //marker = *marker_info; | |
1c3f0b8e | 1762 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
1da177e4 | 1763 | // change the marker subtype to marker response |
128ea6c3 | 1764 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 LT |
1765 | // send the marker response |
1766 | ||
1767 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1768 | pr_debug("Sent Marker Response on port %d\n", |
1769 | port->actor_port_number); | |
1da177e4 LT |
1770 | } |
1771 | } | |
1772 | ||
1773 | /** | |
1774 | * ad_marker_response_received - handle receive of a marker response frame | |
1775 | * @marker: marker PDU received | |
1776 | * @port: the port we're looking at | |
1777 | * | |
1778 | * This function does nothing since we decided not to implement send and handle | |
1779 | * response for marker PDU's, in this stage, but only to respond to marker | |
1780 | * information. | |
1781 | */ | |
1c3f0b8e MD |
1782 | static void ad_marker_response_received(struct bond_marker *marker, |
1783 | struct port *port) | |
1da177e4 | 1784 | { |
128ea6c3 BD |
1785 | marker = NULL; /* just to satisfy the compiler */ |
1786 | port = NULL; /* just to satisfy the compiler */ | |
1da177e4 LT |
1787 | // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW |
1788 | } | |
1789 | ||
1da177e4 LT |
1790 | ////////////////////////////////////////////////////////////////////////////////////// |
1791 | // ================= AD exported functions to the main bonding code ================== | |
1792 | ////////////////////////////////////////////////////////////////////////////////////// | |
1793 | ||
1794 | // Check aggregators status in team every T seconds | |
1795 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1796 | ||
fd989c83 JV |
1797 | /* |
1798 | * bond_3ad_initiate_agg_selection(struct bonding *bond) | |
1799 | * | |
1800 | * Set the aggregation selection timer, to initiate an agg selection in | |
1801 | * the very near future. Called during first initialization, and during | |
1802 | * any down to up transitions of the bond. | |
1803 | */ | |
1804 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1805 | { | |
1806 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1807 | } |
1808 | ||
1da177e4 LT |
1809 | static u16 aggregator_identifier; |
1810 | ||
1811 | /** | |
1812 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1813 | * @bond: bonding struct to work on | |
1814 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1815 | * |
1816 | * Can be called only after the mac address of the bond is set. | |
1817 | */ | |
56d00c67 | 1818 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1819 | { |
1da177e4 | 1820 | // check that the bond is not initialized yet |
3a6d54c5 JP |
1821 | if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), |
1822 | bond->dev->dev_addr)) { | |
1da177e4 LT |
1823 | |
1824 | aggregator_identifier = 0; | |
1825 | ||
1da177e4 LT |
1826 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1827 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1828 | ||
1829 | // initialize how many times this module is called in one second(should be about every 100ms) | |
1830 | ad_ticks_per_sec = tick_resolution; | |
1831 | ||
fd989c83 JV |
1832 | bond_3ad_initiate_agg_selection(bond, |
1833 | AD_AGGREGATOR_SELECTION_TIMER * | |
1834 | ad_ticks_per_sec); | |
1da177e4 LT |
1835 | } |
1836 | } | |
1837 | ||
1838 | /** | |
1839 | * bond_3ad_bind_slave - initialize a slave's port | |
1840 | * @slave: slave struct to work on | |
1841 | * | |
1842 | * Returns: 0 on success | |
1843 | * < 0 on error | |
1844 | */ | |
1845 | int bond_3ad_bind_slave(struct slave *slave) | |
1846 | { | |
1847 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1848 | struct port *port; | |
1849 | struct aggregator *aggregator; | |
1850 | ||
1851 | if (bond == NULL) { | |
a4aee5c8 | 1852 | pr_err("%s: The slave %s is not attached to its bond\n", |
471cb5a3 | 1853 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
1854 | return -1; |
1855 | } | |
1856 | ||
b595076a | 1857 | //check that the slave has not been initialized yet. |
1da177e4 LT |
1858 | if (SLAVE_AD_INFO(slave).port.slave != slave) { |
1859 | ||
1860 | // port initialization | |
1861 | port = &(SLAVE_AD_INFO(slave).port); | |
1862 | ||
bf0239a9 | 1863 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 | 1864 | |
e0809dbc | 1865 | __initialize_port_locks(slave); |
1da177e4 LT |
1866 | port->slave = slave; |
1867 | port->actor_port_number = SLAVE_AD_INFO(slave).id; | |
1868 | // key is determined according to the link speed, duplex and user key(which is yet not supported) | |
1869 | // ------------------------------------------------------------ | |
1870 | // Port key : | User key | Speed |Duplex| | |
1871 | // ------------------------------------------------------------ | |
1872 | // 16 6 1 0 | |
1873 | port->actor_admin_port_key = 0; // initialize this parameter | |
1874 | port->actor_admin_port_key |= __get_duplex(port); | |
1875 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1876 | port->actor_oper_port_key = port->actor_admin_port_key; | |
1877 | // if the port is not full duplex, then the port should be not lacp Enabled | |
7bfc4753 | 1878 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1879 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1880 | // actor system is the bond's system |
1881 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
1882 | // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) | |
1883 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1884 | port->aggregator = NULL; | |
1885 | port->next_port_in_aggregator = NULL; | |
1886 | ||
1887 | __disable_port(port); | |
1da177e4 LT |
1888 | |
1889 | // aggregator initialization | |
1890 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1891 | ||
1892 | ad_initialize_agg(aggregator); | |
1893 | ||
1894 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
1895 | aggregator->aggregator_identifier = (++aggregator_identifier); | |
1896 | aggregator->slave = slave; | |
1897 | aggregator->is_active = 0; | |
1898 | aggregator->num_of_ports = 0; | |
1899 | } | |
1900 | ||
1901 | return 0; | |
1902 | } | |
1903 | ||
1904 | /** | |
1905 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1906 | * @slave: slave struct to work on | |
1907 | * | |
1908 | * Search for the aggregator that is related to this port, remove the | |
1909 | * aggregator and assign another aggregator for other port related to it | |
1910 | * (if any), and remove the port. | |
1911 | */ | |
1912 | void bond_3ad_unbind_slave(struct slave *slave) | |
1913 | { | |
1914 | struct port *port, *prev_port, *temp_port; | |
1915 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1916 | int select_new_active_agg = 0; | |
0b088264 VF |
1917 | struct bonding *bond = slave->bond; |
1918 | struct slave *slave_iter; | |
1919 | struct list_head *iter; | |
a361c83c | 1920 | |
1da177e4 LT |
1921 | // find the aggregator related to this slave |
1922 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1923 | ||
1924 | // find the port related to this slave | |
1925 | port = &(SLAVE_AD_INFO(slave).port); | |
1926 | ||
1927 | // if slave is null, the whole port is not initialized | |
1928 | if (!port->slave) { | |
a4aee5c8 | 1929 | pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", |
471cb5a3 | 1930 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
1931 | return; |
1932 | } | |
1933 | ||
a4aee5c8 JP |
1934 | pr_debug("Unbinding Link Aggregation Group %d\n", |
1935 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1936 | |
1937 | /* Tell the partner that this port is not suitable for aggregation */ | |
1938 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1939 | __update_lacpdu_from_port(port); | |
1940 | ad_lacpdu_send(port); | |
1941 | ||
1942 | // check if this aggregator is occupied | |
1943 | if (aggregator->lag_ports) { | |
1944 | // check if there are other ports related to this aggregator except | |
1945 | // the port related to this slave(thats ensure us that there is a | |
1946 | // reason to search for new aggregator, and that we will find one | |
1947 | if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { | |
1948 | // find new aggregator for the related port(s) | |
0b088264 VF |
1949 | bond_for_each_slave(bond, slave_iter, iter) { |
1950 | new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); | |
fd589a8f | 1951 | // if the new aggregator is empty, or it is connected to our port only |
7bfc4753 BD |
1952 | if (!new_aggregator->lag_ports |
1953 | || ((new_aggregator->lag_ports == port) | |
1954 | && !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 1955 | break; |
1da177e4 | 1956 | } |
0b088264 VF |
1957 | if (!slave_iter) |
1958 | new_aggregator = NULL; | |
1da177e4 LT |
1959 | // if new aggregator found, copy the aggregator's parameters |
1960 | // and connect the related lag_ports to the new aggregator | |
1961 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
a4aee5c8 JP |
1962 | pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", |
1963 | aggregator->aggregator_identifier, | |
1964 | new_aggregator->aggregator_identifier); | |
1da177e4 LT |
1965 | |
1966 | if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { | |
a4aee5c8 | 1967 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 1968 | aggregator->slave->bond->dev->name); |
1da177e4 LT |
1969 | // select new active aggregator |
1970 | select_new_active_agg = 1; | |
1971 | } | |
1972 | ||
1973 | new_aggregator->is_individual = aggregator->is_individual; | |
1974 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
1975 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
1976 | new_aggregator->partner_system = aggregator->partner_system; | |
1977 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
1978 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
1979 | new_aggregator->receive_state = aggregator->receive_state; | |
1980 | new_aggregator->transmit_state = aggregator->transmit_state; | |
1981 | new_aggregator->lag_ports = aggregator->lag_ports; | |
1982 | new_aggregator->is_active = aggregator->is_active; | |
1983 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
1984 | ||
1985 | // update the information that is written on the ports about the aggregator | |
128ea6c3 BD |
1986 | for (temp_port = aggregator->lag_ports; temp_port; |
1987 | temp_port = temp_port->next_port_in_aggregator) { | |
1988 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
1989 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
1990 | } | |
1991 | ||
1992 | // clear the aggregator | |
1993 | ad_clear_agg(aggregator); | |
a361c83c | 1994 | |
7bfc4753 | 1995 | if (select_new_active_agg) |
1da177e4 | 1996 | ad_agg_selection_logic(__get_first_agg(port)); |
1da177e4 | 1997 | } else { |
a4aee5c8 | 1998 | pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", |
471cb5a3 | 1999 | slave->bond->dev->name); |
1da177e4 LT |
2000 | } |
2001 | } else { // in case that the only port related to this aggregator is the one we want to remove | |
2002 | select_new_active_agg = aggregator->is_active; | |
2003 | // clear the aggregator | |
2004 | ad_clear_agg(aggregator); | |
2005 | if (select_new_active_agg) { | |
a4aee5c8 | 2006 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 2007 | slave->bond->dev->name); |
1da177e4 | 2008 | // select new active aggregator |
74684493 VF |
2009 | temp_aggregator = __get_first_agg(port); |
2010 | if (temp_aggregator) | |
2011 | ad_agg_selection_logic(temp_aggregator); | |
1da177e4 LT |
2012 | } |
2013 | } | |
2014 | } | |
2015 | ||
5a03cdb7 | 2016 | pr_debug("Unbinding port %d\n", port->actor_port_number); |
1da177e4 | 2017 | // find the aggregator that this port is connected to |
0b088264 VF |
2018 | bond_for_each_slave(bond, slave_iter, iter) { |
2019 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); | |
1da177e4 LT |
2020 | prev_port = NULL; |
2021 | // search the port in the aggregator's related ports | |
128ea6c3 BD |
2022 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2023 | prev_port = temp_port, | |
2024 | temp_port = temp_port->next_port_in_aggregator) { | |
1da177e4 | 2025 | if (temp_port == port) { // the aggregator found - detach the port from this aggregator |
7bfc4753 | 2026 | if (prev_port) |
1da177e4 | 2027 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2028 | else |
1da177e4 | 2029 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2030 | temp_aggregator->num_of_ports--; |
128ea6c3 | 2031 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 LT |
2032 | select_new_active_agg = temp_aggregator->is_active; |
2033 | // clear the aggregator | |
2034 | ad_clear_agg(temp_aggregator); | |
2035 | if (select_new_active_agg) { | |
a4aee5c8 | 2036 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 2037 | slave->bond->dev->name); |
1da177e4 LT |
2038 | // select new active aggregator |
2039 | ad_agg_selection_logic(__get_first_agg(port)); | |
2040 | } | |
2041 | } | |
2042 | break; | |
2043 | } | |
2044 | } | |
2045 | } | |
128ea6c3 | 2046 | port->slave = NULL; |
1da177e4 LT |
2047 | } |
2048 | ||
2049 | /** | |
2050 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2051 | * @bond: bonding struct to work on | |
2052 | * | |
2053 | * The state machine handling concept in this module is to check every tick | |
2054 | * which state machine should operate any function. The execution order is | |
2055 | * round robin, so when we have an interaction between state machines, the | |
2056 | * reply of one to each other might be delayed until next tick. | |
2057 | * | |
2058 | * This function also complete the initialization when the agg_select_timer | |
2059 | * times out, and it selects an aggregator for the ports that are yet not | |
2060 | * related to any aggregator, and selects the active aggregator for a bond. | |
2061 | */ | |
1b76b316 | 2062 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2063 | { |
1b76b316 JV |
2064 | struct bonding *bond = container_of(work, struct bonding, |
2065 | ad_work.work); | |
1da177e4 | 2066 | struct aggregator *aggregator; |
3c4c88a1 VF |
2067 | struct list_head *iter; |
2068 | struct slave *slave; | |
2069 | struct port *port; | |
1da177e4 | 2070 | |
5cc172c6 | 2071 | if (!rtnl_trylock()) { |
2072 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); | |
2073 | return; | |
2074 | } | |
1da177e4 | 2075 | //check if there are any slaves |
0965a1f3 | 2076 | if (!bond_has_slaves(bond)) |
1da177e4 | 2077 | goto re_arm; |
1da177e4 LT |
2078 | |
2079 | // check if agg_select_timer timer after initialize is timed out | |
2080 | if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
fe9323da VF |
2081 | slave = bond_first_slave(bond); |
2082 | port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL; | |
2083 | ||
1da177e4 | 2084 | // select the active aggregator for the bond |
fe9323da | 2085 | if (port) { |
1da177e4 | 2086 | if (!port->slave) { |
a4aee5c8 JP |
2087 | pr_warning("%s: Warning: bond's first port is uninitialized\n", |
2088 | bond->dev->name); | |
1da177e4 LT |
2089 | goto re_arm; |
2090 | } | |
2091 | ||
2092 | aggregator = __get_first_agg(port); | |
2093 | ad_agg_selection_logic(aggregator); | |
2094 | } | |
f0c76d61 | 2095 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2096 | } |
2097 | ||
2098 | // for each port run the state machines | |
3c4c88a1 VF |
2099 | bond_for_each_slave(bond, slave, iter) { |
2100 | port = &(SLAVE_AD_INFO(slave).port); | |
1da177e4 | 2101 | if (!port->slave) { |
a4aee5c8 JP |
2102 | pr_warning("%s: Warning: Found an uninitialized port\n", |
2103 | bond->dev->name); | |
1da177e4 LT |
2104 | goto re_arm; |
2105 | } | |
2106 | ||
16d79d7d NC |
2107 | /* Lock around state machines to protect data accessed |
2108 | * by all (e.g., port->sm_vars). ad_rx_machine may run | |
2109 | * concurrently due to incoming LACPDU. | |
2110 | */ | |
9ac3524a | 2111 | __get_state_machine_lock(port); |
16d79d7d | 2112 | |
1da177e4 LT |
2113 | ad_rx_machine(NULL, port); |
2114 | ad_periodic_machine(port); | |
2115 | ad_port_selection_logic(port); | |
2116 | ad_mux_machine(port); | |
2117 | ad_tx_machine(port); | |
2118 | ||
2119 | // turn off the BEGIN bit, since we already handled it | |
7bfc4753 | 2120 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2121 | port->sm_vars &= ~AD_PORT_BEGIN; |
16d79d7d | 2122 | |
9ac3524a | 2123 | __release_state_machine_lock(port); |
1da177e4 LT |
2124 | } |
2125 | ||
2126 | re_arm: | |
5cc172c6 | 2127 | rtnl_unlock(); |
e6d265e8 | 2128 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2129 | } |
2130 | ||
2131 | /** | |
2132 | * bond_3ad_rx_indication - handle a received frame | |
2133 | * @lacpdu: received lacpdu | |
2134 | * @slave: slave struct to work on | |
2135 | * @length: length of the data received | |
2136 | * | |
2137 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2138 | * received frames (loopback). Since only the payload is given to this | |
2139 | * function, it check for loopback. | |
2140 | */ | |
13a8e0c8 | 2141 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) |
1da177e4 LT |
2142 | { |
2143 | struct port *port; | |
13a8e0c8 | 2144 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2145 | |
2146 | if (length >= sizeof(struct lacpdu)) { | |
2147 | ||
2148 | port = &(SLAVE_AD_INFO(slave).port); | |
2149 | ||
2150 | if (!port->slave) { | |
a4aee5c8 | 2151 | pr_warning("%s: Warning: port of slave %s is uninitialized\n", |
471cb5a3 | 2152 | slave->dev->name, slave->bond->dev->name); |
13a8e0c8 | 2153 | return ret; |
1da177e4 LT |
2154 | } |
2155 | ||
2156 | switch (lacpdu->subtype) { | |
2157 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2158 | ret = RX_HANDLER_CONSUMED; |
a4aee5c8 JP |
2159 | pr_debug("Received LACPDU on port %d\n", |
2160 | port->actor_port_number); | |
16d79d7d | 2161 | /* Protect against concurrent state machines */ |
9ac3524a | 2162 | __get_state_machine_lock(port); |
1da177e4 | 2163 | ad_rx_machine(lacpdu, port); |
9ac3524a | 2164 | __release_state_machine_lock(port); |
1da177e4 LT |
2165 | break; |
2166 | ||
2167 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2168 | ret = RX_HANDLER_CONSUMED; |
1da177e4 LT |
2169 | // No need to convert fields to Little Endian since we don't use the marker's fields. |
2170 | ||
1c3f0b8e | 2171 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2172 | case AD_MARKER_INFORMATION_SUBTYPE: |
a4aee5c8 JP |
2173 | pr_debug("Received Marker Information on port %d\n", |
2174 | port->actor_port_number); | |
1c3f0b8e | 2175 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2176 | break; |
2177 | ||
2178 | case AD_MARKER_RESPONSE_SUBTYPE: | |
a4aee5c8 JP |
2179 | pr_debug("Received Marker Response on port %d\n", |
2180 | port->actor_port_number); | |
1c3f0b8e | 2181 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2182 | break; |
2183 | ||
2184 | default: | |
a4aee5c8 JP |
2185 | pr_debug("Received an unknown Marker subtype on slot %d\n", |
2186 | port->actor_port_number); | |
1da177e4 LT |
2187 | } |
2188 | } | |
2189 | } | |
13a8e0c8 | 2190 | return ret; |
1da177e4 LT |
2191 | } |
2192 | ||
2193 | /** | |
2194 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2195 | * @slave: slave struct to work on | |
2196 | * | |
2197 | * Handle reselection of aggregator (if needed) for this port. | |
2198 | */ | |
2199 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2200 | { | |
2201 | struct port *port; | |
2202 | ||
2203 | port = &(SLAVE_AD_INFO(slave).port); | |
2204 | ||
2205 | // if slave is null, the whole port is not initialized | |
2206 | if (!port->slave) { | |
a4aee5c8 | 2207 | pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", |
471cb5a3 | 2208 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2209 | return; |
2210 | } | |
2211 | ||
2212 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
128ea6c3 BD |
2213 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2214 | (__get_link_speed(port) << 1); | |
5a03cdb7 | 2215 | pr_debug("Port %d changed speed\n", port->actor_port_number); |
1da177e4 LT |
2216 | // there is no need to reselect a new aggregator, just signal the |
2217 | // state machines to reinitialize | |
2218 | port->sm_vars |= AD_PORT_BEGIN; | |
2219 | } | |
2220 | ||
2221 | /** | |
2222 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2223 | * @slave: slave struct to work on | |
2224 | * | |
2225 | * Handle reselection of aggregator (if needed) for this port. | |
2226 | */ | |
2227 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2228 | { | |
2229 | struct port *port; | |
2230 | ||
128ea6c3 | 2231 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 LT |
2232 | |
2233 | // if slave is null, the whole port is not initialized | |
2234 | if (!port->slave) { | |
a4aee5c8 | 2235 | pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", |
471cb5a3 | 2236 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2237 | return; |
2238 | } | |
2239 | ||
2240 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
128ea6c3 BD |
2241 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2242 | __get_duplex(port); | |
5a03cdb7 | 2243 | pr_debug("Port %d changed duplex\n", port->actor_port_number); |
1da177e4 LT |
2244 | // there is no need to reselect a new aggregator, just signal the |
2245 | // state machines to reinitialize | |
2246 | port->sm_vars |= AD_PORT_BEGIN; | |
2247 | } | |
2248 | ||
2249 | /** | |
2250 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2251 | * @slave: slave struct to work on | |
2252 | * @status: whether the link is now up or down | |
2253 | * | |
2254 | * Handle reselection of aggregator (if needed) for this port. | |
2255 | */ | |
2256 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2257 | { | |
2258 | struct port *port; | |
2259 | ||
2260 | port = &(SLAVE_AD_INFO(slave).port); | |
2261 | ||
2262 | // if slave is null, the whole port is not initialized | |
2263 | if (!port->slave) { | |
a4aee5c8 | 2264 | pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", |
471cb5a3 | 2265 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2266 | return; |
2267 | } | |
2268 | ||
2269 | // 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) | |
2270 | // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report | |
2271 | if (link == BOND_LINK_UP) { | |
f48127b6 | 2272 | port->is_enabled = true; |
1da177e4 | 2273 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2274 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2275 | __get_duplex(port); | |
1da177e4 | 2276 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2277 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2278 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2279 | } else { |
2280 | /* link has failed */ | |
f48127b6 | 2281 | port->is_enabled = false; |
1da177e4 | 2282 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2283 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2284 | ~AD_SPEED_KEY_BITS); | |
1da177e4 LT |
2285 | } |
2286 | //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); | |
2287 | // there is no need to reselect a new aggregator, just signal the | |
2288 | // state machines to reinitialize | |
2289 | port->sm_vars |= AD_PORT_BEGIN; | |
2290 | } | |
2291 | ||
ff59c456 | 2292 | /* |
a361c83c | 2293 | * set link state for bonding master: if we have an active |
ff59c456 JV |
2294 | * aggregator, we're up, if not, we're down. Presumes that we cannot |
2295 | * have an active aggregator if there are no slaves with link up. | |
2296 | * | |
031ae4de JV |
2297 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2298 | * | |
ff59c456 JV |
2299 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2300 | * change, nonzero if it does. | |
2301 | */ | |
2302 | int bond_3ad_set_carrier(struct bonding *bond) | |
2303 | { | |
655f8919 | 2304 | struct aggregator *active; |
dec1e90e | 2305 | struct slave *first_slave; |
655f8919 | 2306 | |
dec1e90e | 2307 | first_slave = bond_first_slave(bond); |
2308 | if (!first_slave) | |
2309 | return 0; | |
2310 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator)); | |
655f8919 | 2311 | if (active) { |
2312 | /* are enough slaves available to consider link up? */ | |
2313 | if (active->num_of_ports < bond->params.min_links) { | |
2314 | if (netif_carrier_ok(bond->dev)) { | |
2315 | netif_carrier_off(bond->dev); | |
2316 | return 1; | |
2317 | } | |
2318 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 JV |
2319 | netif_carrier_on(bond->dev); |
2320 | return 1; | |
2321 | } | |
2322 | return 0; | |
2323 | } | |
2324 | ||
2325 | if (netif_carrier_ok(bond->dev)) { | |
2326 | netif_carrier_off(bond->dev); | |
2327 | return 1; | |
2328 | } | |
2329 | return 0; | |
2330 | } | |
2331 | ||
1da177e4 | 2332 | /** |
318debd8 | 2333 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2334 | * @bond: bonding struct to work on |
2335 | * @ad_info: ad_info struct to fill with the bond's info | |
2336 | * | |
2337 | * Returns: 0 on success | |
2338 | * < 0 on error | |
2339 | */ | |
318debd8 | 2340 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2341 | struct ad_info *ad_info) | |
1da177e4 LT |
2342 | { |
2343 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2344 | struct list_head *iter; |
2345 | struct slave *slave; | |
1da177e4 LT |
2346 | struct port *port; |
2347 | ||
47e91f56 | 2348 | bond_for_each_slave_rcu(bond, slave, iter) { |
3c4c88a1 | 2349 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 LT |
2350 | if (port->aggregator && port->aggregator->is_active) { |
2351 | aggregator = port->aggregator; | |
2352 | break; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | if (aggregator) { | |
2357 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2358 | ad_info->ports = aggregator->num_of_ports; | |
2359 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2360 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2361 | memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); | |
2362 | return 0; | |
2363 | } | |
2364 | ||
2365 | return -1; | |
2366 | } | |
2367 | ||
318debd8 | 2368 | /* Wrapper used to hold bond->lock so no slave manipulation can occur */ |
2369 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2370 | { | |
2371 | int ret; | |
2372 | ||
47e91f56 | 2373 | rcu_read_lock(); |
318debd8 | 2374 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2375 | rcu_read_unlock(); |
318debd8 | 2376 | |
2377 | return ret; | |
2378 | } | |
2379 | ||
1da177e4 LT |
2380 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) |
2381 | { | |
454d7c9b | 2382 | struct bonding *bond = netdev_priv(dev); |
c33d7887 VF |
2383 | struct slave *slave, *first_ok_slave; |
2384 | struct aggregator *agg; | |
2385 | struct ad_info ad_info; | |
9caff1e7 | 2386 | struct list_head *iter; |
1da177e4 | 2387 | int slaves_in_agg; |
c33d7887 | 2388 | int slave_agg_no; |
1da177e4 | 2389 | int res = 1; |
c33d7887 | 2390 | int agg_id; |
1da177e4 | 2391 | |
318debd8 | 2392 | if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { |
2393 | pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n", | |
a4aee5c8 | 2394 | dev->name); |
1da177e4 LT |
2395 | goto out; |
2396 | } | |
2397 | ||
2398 | slaves_in_agg = ad_info.ports; | |
2399 | agg_id = ad_info.aggregator_id; | |
2400 | ||
2401 | if (slaves_in_agg == 0) { | |
a4aee5c8 | 2402 | pr_debug("%s: Error: active aggregator is empty\n", dev->name); |
1da177e4 LT |
2403 | goto out; |
2404 | } | |
2405 | ||
32819dc1 | 2406 | slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg); |
c33d7887 | 2407 | first_ok_slave = NULL; |
1da177e4 | 2408 | |
47e91f56 | 2409 | bond_for_each_slave_rcu(bond, slave, iter) { |
c33d7887 VF |
2410 | agg = SLAVE_AD_INFO(slave).port.aggregator; |
2411 | if (!agg || agg->aggregator_identifier != agg_id) | |
2412 | continue; | |
1da177e4 | 2413 | |
c33d7887 VF |
2414 | if (slave_agg_no >= 0) { |
2415 | if (!first_ok_slave && SLAVE_IS_OK(slave)) | |
2416 | first_ok_slave = slave; | |
1da177e4 | 2417 | slave_agg_no--; |
c33d7887 VF |
2418 | continue; |
2419 | } | |
2420 | ||
2421 | if (SLAVE_IS_OK(slave)) { | |
2422 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
2423 | goto out; | |
1da177e4 LT |
2424 | } |
2425 | } | |
2426 | ||
2427 | if (slave_agg_no >= 0) { | |
a4aee5c8 JP |
2428 | pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", |
2429 | dev->name, agg_id); | |
1da177e4 LT |
2430 | goto out; |
2431 | } | |
2432 | ||
c33d7887 VF |
2433 | /* we couldn't find any suitable slave after the agg_no, so use the |
2434 | * first suitable found, if found. */ | |
2435 | if (first_ok_slave) | |
2436 | res = bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); | |
1da177e4 LT |
2437 | |
2438 | out: | |
2439 | if (res) { | |
2440 | /* no suitable interface, frame not sent */ | |
04502430 | 2441 | kfree_skb(skb); |
1da177e4 | 2442 | } |
0693e88e | 2443 | |
ec634fe3 | 2444 | return NETDEV_TX_OK; |
1da177e4 LT |
2445 | } |
2446 | ||
de063b70 ED |
2447 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2448 | struct slave *slave) | |
1da177e4 | 2449 | { |
13a8e0c8 | 2450 | int ret = RX_HANDLER_ANOTHER; |
de063b70 ED |
2451 | struct lacpdu *lacpdu, _lacpdu; |
2452 | ||
3aba891d | 2453 | if (skb->protocol != PKT_TYPE_LACPDU) |
13a8e0c8 | 2454 | return ret; |
b3053251 | 2455 | |
de063b70 ED |
2456 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2457 | if (!lacpdu) | |
13a8e0c8 | 2458 | return ret; |
ab12811c | 2459 | |
1da177e4 | 2460 | read_lock(&bond->lock); |
de063b70 | 2461 | ret = bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2462 | read_unlock(&bond->lock); |
13a8e0c8 | 2463 | return ret; |
1da177e4 | 2464 | } |
ba824a8b PP |
2465 | |
2466 | /* | |
2467 | * When modify lacp_rate parameter via sysfs, | |
2468 | * update actor_oper_port_state of each port. | |
2469 | * | |
2470 | * Hold slave->state_machine_lock, | |
2471 | * so we can modify port->actor_oper_port_state, | |
2472 | * no matter bond is up or down. | |
2473 | */ | |
2474 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2475 | { | |
ba824a8b | 2476 | struct port *port = NULL; |
9caff1e7 | 2477 | struct list_head *iter; |
c509316b | 2478 | struct slave *slave; |
ba824a8b PP |
2479 | int lacp_fast; |
2480 | ||
ba824a8b | 2481 | lacp_fast = bond->params.lacp_fast; |
9caff1e7 | 2482 | bond_for_each_slave(bond, slave, iter) { |
ba824a8b PP |
2483 | port = &(SLAVE_AD_INFO(slave).port); |
2484 | __get_state_machine_lock(port); | |
2485 | if (lacp_fast) | |
2486 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2487 | else | |
2488 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
2489 | __release_state_machine_lock(port); | |
2490 | } | |
ba824a8b | 2491 | } |