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1 | // SPDX-License-Identifier: GPL-2.0-or-later | |
2 | /* | |
3 | * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. | |
4 | */ | |
5 | ||
6 | #include <linux/skbuff.h> | |
7 | #include <linux/if_ether.h> | |
8 | #include <linux/netdevice.h> | |
9 | #include <linux/spinlock.h> | |
10 | #include <linux/ethtool.h> | |
11 | #include <linux/etherdevice.h> | |
12 | #include <linux/if_bonding.h> | |
13 | #include <linux/pkt_sched.h> | |
14 | #include <net/net_namespace.h> | |
15 | #include <net/bonding.h> | |
16 | #include <net/bond_3ad.h> | |
17 | #include <net/netlink.h> | |
18 | ||
19 | /* General definitions */ | |
20 | #define AD_SHORT_TIMEOUT 1 | |
21 | #define AD_LONG_TIMEOUT 0 | |
22 | #define AD_STANDBY 0x2 | |
23 | #define AD_MAX_TX_IN_SECOND 3 | |
24 | #define AD_COLLECTOR_MAX_DELAY 0 | |
25 | ||
26 | /* Timer definitions (43.4.4 in the 802.3ad standard) */ | |
27 | #define AD_FAST_PERIODIC_TIME 1 | |
28 | #define AD_SLOW_PERIODIC_TIME 30 | |
29 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
30 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
31 | #define AD_CHURN_DETECTION_TIME 60 | |
32 | #define AD_AGGREGATE_WAIT_TIME 2 | |
33 | ||
34 | /* Port Variables definitions used by the State Machines (43.4.7 in the | |
35 | * 802.3ad standard) | |
36 | */ | |
37 | #define AD_PORT_BEGIN 0x1 | |
38 | #define AD_PORT_LACP_ENABLED 0x2 | |
39 | #define AD_PORT_ACTOR_CHURN 0x4 | |
40 | #define AD_PORT_PARTNER_CHURN 0x8 | |
41 | #define AD_PORT_READY 0x10 | |
42 | #define AD_PORT_READY_N 0x20 | |
43 | #define AD_PORT_MATCHED 0x40 | |
44 | #define AD_PORT_STANDBY 0x80 | |
45 | #define AD_PORT_SELECTED 0x100 | |
46 | #define AD_PORT_MOVED 0x200 | |
47 | #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) | |
48 | ||
49 | /* Port Key definitions | |
50 | * key is determined according to the link speed, duplex and | |
51 | * user key (which is yet not supported) | |
52 | * -------------------------------------------------------------- | |
53 | * Port key | User key (10 bits) | Speed (5 bits) | Duplex| | |
54 | * -------------------------------------------------------------- | |
55 | * |15 6|5 1|0 | |
56 | */ | |
57 | #define AD_DUPLEX_KEY_MASKS 0x1 | |
58 | #define AD_SPEED_KEY_MASKS 0x3E | |
59 | #define AD_USER_KEY_MASKS 0xFFC0 | |
60 | ||
61 | enum ad_link_speed_type { | |
62 | AD_LINK_SPEED_1MBPS = 1, | |
63 | AD_LINK_SPEED_10MBPS, | |
64 | AD_LINK_SPEED_100MBPS, | |
65 | AD_LINK_SPEED_1000MBPS, | |
66 | AD_LINK_SPEED_2500MBPS, | |
67 | AD_LINK_SPEED_5000MBPS, | |
68 | AD_LINK_SPEED_10000MBPS, | |
69 | AD_LINK_SPEED_14000MBPS, | |
70 | AD_LINK_SPEED_20000MBPS, | |
71 | AD_LINK_SPEED_25000MBPS, | |
72 | AD_LINK_SPEED_40000MBPS, | |
73 | AD_LINK_SPEED_50000MBPS, | |
74 | AD_LINK_SPEED_56000MBPS, | |
75 | AD_LINK_SPEED_100000MBPS, | |
76 | AD_LINK_SPEED_200000MBPS, | |
77 | AD_LINK_SPEED_400000MBPS, | |
78 | }; | |
79 | ||
80 | /* compare MAC addresses */ | |
81 | #define MAC_ADDRESS_EQUAL(A, B) \ | |
82 | ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) | |
83 | ||
84 | static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { | |
85 | 0, 0, 0, 0, 0, 0 | |
86 | }; | |
87 | static u16 ad_ticks_per_sec; | |
88 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
89 | ||
90 | static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = | |
91 | MULTICAST_LACPDU_ADDR; | |
92 | ||
93 | /* ================= main 802.3ad protocol functions ================== */ | |
94 | static int ad_lacpdu_send(struct port *port); | |
95 | static int ad_marker_send(struct port *port, struct bond_marker *marker); | |
96 | static void ad_mux_machine(struct port *port, bool *update_slave_arr); | |
97 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); | |
98 | static void ad_tx_machine(struct port *port); | |
99 | static void ad_periodic_machine(struct port *port, struct bond_params *bond_params); | |
100 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); | |
101 | static void ad_agg_selection_logic(struct aggregator *aggregator, | |
102 | bool *update_slave_arr); | |
103 | static void ad_clear_agg(struct aggregator *aggregator); | |
104 | static void ad_initialize_agg(struct aggregator *aggregator); | |
105 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
106 | static void ad_enable_collecting_distributing(struct port *port, | |
107 | bool *update_slave_arr); | |
108 | static void ad_disable_collecting_distributing(struct port *port, | |
109 | bool *update_slave_arr); | |
110 | static void ad_marker_info_received(struct bond_marker *marker_info, | |
111 | struct port *port); | |
112 | static void ad_marker_response_received(struct bond_marker *marker, | |
113 | struct port *port); | |
114 | static void ad_update_actor_keys(struct port *port, bool reset); | |
115 | ||
116 | ||
117 | /* ================= api to bonding and kernel code ================== */ | |
118 | ||
119 | /** | |
120 | * __get_bond_by_port - get the port's bonding struct | |
121 | * @port: the port we're looking at | |
122 | * | |
123 | * Return @port's bonding struct, or %NULL if it can't be found. | |
124 | */ | |
125 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
126 | { | |
127 | if (port->slave == NULL) | |
128 | return NULL; | |
129 | ||
130 | return bond_get_bond_by_slave(port->slave); | |
131 | } | |
132 | ||
133 | /** | |
134 | * __get_first_agg - get the first aggregator in the bond | |
135 | * @port: the port we're looking at | |
136 | * | |
137 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
138 | * found. | |
139 | * The caller must hold RCU or RTNL lock. | |
140 | */ | |
141 | static inline struct aggregator *__get_first_agg(struct port *port) | |
142 | { | |
143 | struct bonding *bond = __get_bond_by_port(port); | |
144 | struct slave *first_slave; | |
145 | struct aggregator *agg; | |
146 | ||
147 | /* If there's no bond for this port, or bond has no slaves */ | |
148 | if (bond == NULL) | |
149 | return NULL; | |
150 | ||
151 | rcu_read_lock(); | |
152 | first_slave = bond_first_slave_rcu(bond); | |
153 | agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; | |
154 | rcu_read_unlock(); | |
155 | ||
156 | return agg; | |
157 | } | |
158 | ||
159 | /** | |
160 | * __agg_has_partner - see if we have a partner | |
161 | * @agg: the agregator we're looking at | |
162 | * | |
163 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
164 | * address for the partner). Return 0 if not. | |
165 | */ | |
166 | static inline int __agg_has_partner(struct aggregator *agg) | |
167 | { | |
168 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
169 | } | |
170 | ||
171 | /** | |
172 | * __disable_port - disable the port's slave | |
173 | * @port: the port we're looking at | |
174 | */ | |
175 | static inline void __disable_port(struct port *port) | |
176 | { | |
177 | bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); | |
178 | } | |
179 | ||
180 | /** | |
181 | * __enable_port - enable the port's slave, if it's up | |
182 | * @port: the port we're looking at | |
183 | */ | |
184 | static inline void __enable_port(struct port *port) | |
185 | { | |
186 | struct slave *slave = port->slave; | |
187 | ||
188 | if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) | |
189 | bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); | |
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 | static inline int __port_is_enabled(struct port *port) | |
197 | { | |
198 | return bond_is_active_slave(port->slave); | |
199 | } | |
200 | ||
201 | /** | |
202 | * __get_agg_selection_mode - get the aggregator selection mode | |
203 | * @port: the port we're looking at | |
204 | * | |
205 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. | |
206 | */ | |
207 | static inline u32 __get_agg_selection_mode(struct port *port) | |
208 | { | |
209 | struct bonding *bond = __get_bond_by_port(port); | |
210 | ||
211 | if (bond == NULL) | |
212 | return BOND_AD_STABLE; | |
213 | ||
214 | return bond->params.ad_select; | |
215 | } | |
216 | ||
217 | /** | |
218 | * __check_agg_selection_timer - check if the selection timer has expired | |
219 | * @port: the port we're looking at | |
220 | */ | |
221 | static inline int __check_agg_selection_timer(struct port *port) | |
222 | { | |
223 | struct bonding *bond = __get_bond_by_port(port); | |
224 | ||
225 | if (bond == NULL) | |
226 | return 0; | |
227 | ||
228 | return atomic_read(&BOND_AD_INFO(bond).agg_select_timer) ? 1 : 0; | |
229 | } | |
230 | ||
231 | /** | |
232 | * __get_link_speed - get a port's speed | |
233 | * @port: the port we're looking at | |
234 | * | |
235 | * Return @port's speed in 802.3ad enum format. i.e. one of: | |
236 | * 0, | |
237 | * %AD_LINK_SPEED_10MBPS, | |
238 | * %AD_LINK_SPEED_100MBPS, | |
239 | * %AD_LINK_SPEED_1000MBPS, | |
240 | * %AD_LINK_SPEED_2500MBPS, | |
241 | * %AD_LINK_SPEED_5000MBPS, | |
242 | * %AD_LINK_SPEED_10000MBPS | |
243 | * %AD_LINK_SPEED_14000MBPS, | |
244 | * %AD_LINK_SPEED_20000MBPS | |
245 | * %AD_LINK_SPEED_25000MBPS | |
246 | * %AD_LINK_SPEED_40000MBPS | |
247 | * %AD_LINK_SPEED_50000MBPS | |
248 | * %AD_LINK_SPEED_56000MBPS | |
249 | * %AD_LINK_SPEED_100000MBPS | |
250 | * %AD_LINK_SPEED_200000MBPS | |
251 | * %AD_LINK_SPEED_400000MBPS | |
252 | */ | |
253 | static u16 __get_link_speed(struct port *port) | |
254 | { | |
255 | struct slave *slave = port->slave; | |
256 | u16 speed; | |
257 | ||
258 | /* this if covers only a special case: when the configuration starts | |
259 | * with link down, it sets the speed to 0. | |
260 | * This is done in spite of the fact that the e100 driver reports 0 | |
261 | * to be compatible with MVT in the future. | |
262 | */ | |
263 | if (slave->link != BOND_LINK_UP) | |
264 | speed = 0; | |
265 | else { | |
266 | switch (slave->speed) { | |
267 | case SPEED_10: | |
268 | speed = AD_LINK_SPEED_10MBPS; | |
269 | break; | |
270 | ||
271 | case SPEED_100: | |
272 | speed = AD_LINK_SPEED_100MBPS; | |
273 | break; | |
274 | ||
275 | case SPEED_1000: | |
276 | speed = AD_LINK_SPEED_1000MBPS; | |
277 | break; | |
278 | ||
279 | case SPEED_2500: | |
280 | speed = AD_LINK_SPEED_2500MBPS; | |
281 | break; | |
282 | ||
283 | case SPEED_5000: | |
284 | speed = AD_LINK_SPEED_5000MBPS; | |
285 | break; | |
286 | ||
287 | case SPEED_10000: | |
288 | speed = AD_LINK_SPEED_10000MBPS; | |
289 | break; | |
290 | ||
291 | case SPEED_14000: | |
292 | speed = AD_LINK_SPEED_14000MBPS; | |
293 | break; | |
294 | ||
295 | case SPEED_20000: | |
296 | speed = AD_LINK_SPEED_20000MBPS; | |
297 | break; | |
298 | ||
299 | case SPEED_25000: | |
300 | speed = AD_LINK_SPEED_25000MBPS; | |
301 | break; | |
302 | ||
303 | case SPEED_40000: | |
304 | speed = AD_LINK_SPEED_40000MBPS; | |
305 | break; | |
306 | ||
307 | case SPEED_50000: | |
308 | speed = AD_LINK_SPEED_50000MBPS; | |
309 | break; | |
310 | ||
311 | case SPEED_56000: | |
312 | speed = AD_LINK_SPEED_56000MBPS; | |
313 | break; | |
314 | ||
315 | case SPEED_100000: | |
316 | speed = AD_LINK_SPEED_100000MBPS; | |
317 | break; | |
318 | ||
319 | case SPEED_200000: | |
320 | speed = AD_LINK_SPEED_200000MBPS; | |
321 | break; | |
322 | ||
323 | case SPEED_400000: | |
324 | speed = AD_LINK_SPEED_400000MBPS; | |
325 | break; | |
326 | ||
327 | default: | |
328 | /* unknown speed value from ethtool. shouldn't happen */ | |
329 | if (slave->speed != SPEED_UNKNOWN) | |
330 | pr_err_once("%s: (slave %s): unknown ethtool speed (%d) for port %d (set it to 0)\n", | |
331 | slave->bond->dev->name, | |
332 | slave->dev->name, slave->speed, | |
333 | port->actor_port_number); | |
334 | speed = 0; | |
335 | break; | |
336 | } | |
337 | } | |
338 | ||
339 | slave_dbg(slave->bond->dev, slave->dev, "Port %d Received link speed %d update from adapter\n", | |
340 | port->actor_port_number, speed); | |
341 | return speed; | |
342 | } | |
343 | ||
344 | /** | |
345 | * __get_duplex - get a port's duplex | |
346 | * @port: the port we're looking at | |
347 | * | |
348 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
349 | * 0x01 if in full duplex | |
350 | * 0x00 otherwise | |
351 | */ | |
352 | static u8 __get_duplex(struct port *port) | |
353 | { | |
354 | struct slave *slave = port->slave; | |
355 | u8 retval = 0x0; | |
356 | ||
357 | /* handling a special case: when the configuration starts with | |
358 | * link down, it sets the duplex to 0. | |
359 | */ | |
360 | if (slave->link == BOND_LINK_UP) { | |
361 | switch (slave->duplex) { | |
362 | case DUPLEX_FULL: | |
363 | retval = 0x1; | |
364 | slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status full duplex update from adapter\n", | |
365 | port->actor_port_number); | |
366 | break; | |
367 | case DUPLEX_HALF: | |
368 | default: | |
369 | retval = 0x0; | |
370 | slave_dbg(slave->bond->dev, slave->dev, "Port %d Received status NOT full duplex update from adapter\n", | |
371 | port->actor_port_number); | |
372 | break; | |
373 | } | |
374 | } | |
375 | return retval; | |
376 | } | |
377 | ||
378 | static void __ad_actor_update_port(struct port *port) | |
379 | { | |
380 | const struct bonding *bond = bond_get_bond_by_slave(port->slave); | |
381 | ||
382 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
383 | port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; | |
384 | } | |
385 | ||
386 | /* Conversions */ | |
387 | ||
388 | /** | |
389 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
390 | * @timer_type: which timer to operate | |
391 | * @par: timer parameter. see below | |
392 | * | |
393 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
394 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
395 | * %SLOW_PERIODIC_TIME. | |
396 | */ | |
397 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
398 | { | |
399 | u16 retval = 0; /* to silence the compiler */ | |
400 | ||
401 | switch (timer_type) { | |
402 | case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ | |
403 | if (par) | |
404 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); | |
405 | else | |
406 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); | |
407 | break; | |
408 | case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ | |
409 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
410 | break; | |
411 | case AD_PERIODIC_TIMER: /* for periodic machine */ | |
412 | retval = (par*ad_ticks_per_sec); /* long timeout */ | |
413 | break; | |
414 | case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ | |
415 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
416 | break; | |
417 | case AD_WAIT_WHILE_TIMER: /* for selection machine */ | |
418 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
419 | break; | |
420 | } | |
421 | ||
422 | return retval; | |
423 | } | |
424 | ||
425 | ||
426 | /* ================= ad_rx_machine helper functions ================== */ | |
427 | ||
428 | /** | |
429 | * __choose_matched - update a port's matched variable from a received lacpdu | |
430 | * @lacpdu: the lacpdu we've received | |
431 | * @port: the port we're looking at | |
432 | * | |
433 | * Update the value of the matched variable, using parameter values from a | |
434 | * newly received lacpdu. Parameter values for the partner carried in the | |
435 | * received PDU are compared with the corresponding operational parameter | |
436 | * values for the actor. Matched is set to TRUE if all of these parameters | |
437 | * match and the PDU parameter partner_state.aggregation has the same value as | |
438 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
439 | * in the aggregation. Matched is also set to TRUE if the value of | |
440 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
441 | * an individual link and lacp will actively maintain the link. Otherwise, | |
442 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
443 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
444 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
445 | * partner_state.lacp_activity variables are TRUE. | |
446 | * | |
447 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
448 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
449 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
450 | */ | |
451 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
452 | { | |
453 | /* check if all parameters are alike | |
454 | * or this is individual link(aggregation == FALSE) | |
455 | * then update the state machine Matched variable. | |
456 | */ | |
457 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && | |
458 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
459 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && | |
460 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && | |
461 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
462 | ((lacpdu->partner_state & LACP_STATE_AGGREGATION) == (port->actor_oper_port_state & LACP_STATE_AGGREGATION))) || | |
463 | ((lacpdu->actor_state & LACP_STATE_AGGREGATION) == 0) | |
464 | ) { | |
465 | port->sm_vars |= AD_PORT_MATCHED; | |
466 | } else { | |
467 | port->sm_vars &= ~AD_PORT_MATCHED; | |
468 | } | |
469 | } | |
470 | ||
471 | /** | |
472 | * __record_pdu - record parameters from a received lacpdu | |
473 | * @lacpdu: the lacpdu we've received | |
474 | * @port: the port we're looking at | |
475 | * | |
476 | * Record the parameter values for the Actor carried in a received lacpdu as | |
477 | * the current partner operational parameter values and sets | |
478 | * actor_oper_port_state.defaulted to FALSE. | |
479 | */ | |
480 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
481 | { | |
482 | if (lacpdu && port) { | |
483 | struct port_params *partner = &port->partner_oper; | |
484 | ||
485 | __choose_matched(lacpdu, port); | |
486 | /* record the new parameter values for the partner | |
487 | * operational | |
488 | */ | |
489 | partner->port_number = ntohs(lacpdu->actor_port); | |
490 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
491 | partner->system = lacpdu->actor_system; | |
492 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
493 | partner->key = ntohs(lacpdu->actor_key); | |
494 | partner->port_state = lacpdu->actor_state; | |
495 | ||
496 | /* set actor_oper_port_state.defaulted to FALSE */ | |
497 | port->actor_oper_port_state &= ~LACP_STATE_DEFAULTED; | |
498 | ||
499 | /* set the partner sync. to on if the partner is sync, | |
500 | * and the port is matched | |
501 | */ | |
502 | if ((port->sm_vars & AD_PORT_MATCHED) && | |
503 | (lacpdu->actor_state & LACP_STATE_SYNCHRONIZATION)) { | |
504 | partner->port_state |= LACP_STATE_SYNCHRONIZATION; | |
505 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
506 | "partner sync=1\n"); | |
507 | } else { | |
508 | partner->port_state &= ~LACP_STATE_SYNCHRONIZATION; | |
509 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
510 | "partner sync=0\n"); | |
511 | } | |
512 | } | |
513 | } | |
514 | ||
515 | /** | |
516 | * __record_default - record default parameters | |
517 | * @port: the port we're looking at | |
518 | * | |
519 | * This function records the default parameter values for the partner carried | |
520 | * in the Partner Admin parameters as the current partner operational parameter | |
521 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
522 | */ | |
523 | static void __record_default(struct port *port) | |
524 | { | |
525 | if (port) { | |
526 | /* record the partner admin parameters */ | |
527 | memcpy(&port->partner_oper, &port->partner_admin, | |
528 | sizeof(struct port_params)); | |
529 | ||
530 | /* set actor_oper_port_state.defaulted to true */ | |
531 | port->actor_oper_port_state |= LACP_STATE_DEFAULTED; | |
532 | } | |
533 | } | |
534 | ||
535 | /** | |
536 | * __update_selected - update a port's Selected variable from a received lacpdu | |
537 | * @lacpdu: the lacpdu we've received | |
538 | * @port: the port we're looking at | |
539 | * | |
540 | * Update the value of the selected variable, using parameter values from a | |
541 | * newly received lacpdu. The parameter values for the Actor carried in the | |
542 | * received PDU are compared with the corresponding operational parameter | |
543 | * values for the ports partner. If one or more of the comparisons shows that | |
544 | * the value(s) received in the PDU differ from the current operational values, | |
545 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
546 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
547 | */ | |
548 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
549 | { | |
550 | if (lacpdu && port) { | |
551 | const struct port_params *partner = &port->partner_oper; | |
552 | ||
553 | /* check if any parameter is different then | |
554 | * update the state machine selected variable. | |
555 | */ | |
556 | if (ntohs(lacpdu->actor_port) != partner->port_number || | |
557 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
558 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || | |
559 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || | |
560 | ntohs(lacpdu->actor_key) != partner->key || | |
561 | (lacpdu->actor_state & LACP_STATE_AGGREGATION) != (partner->port_state & LACP_STATE_AGGREGATION)) { | |
562 | port->sm_vars &= ~AD_PORT_SELECTED; | |
563 | } | |
564 | } | |
565 | } | |
566 | ||
567 | /** | |
568 | * __update_default_selected - update a port's Selected variable from Partner | |
569 | * @port: the port we're looking at | |
570 | * | |
571 | * This function updates the value of the selected variable, using the partner | |
572 | * administrative parameter values. The administrative values are compared with | |
573 | * the corresponding operational parameter values for the partner. If one or | |
574 | * more of the comparisons shows that the administrative value(s) differ from | |
575 | * the current operational values, then Selected is set to FALSE and | |
576 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
577 | * Selected remains unchanged. | |
578 | */ | |
579 | static void __update_default_selected(struct port *port) | |
580 | { | |
581 | if (port) { | |
582 | const struct port_params *admin = &port->partner_admin; | |
583 | const struct port_params *oper = &port->partner_oper; | |
584 | ||
585 | /* check if any parameter is different then | |
586 | * update the state machine selected variable. | |
587 | */ | |
588 | if (admin->port_number != oper->port_number || | |
589 | admin->port_priority != oper->port_priority || | |
590 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || | |
591 | admin->system_priority != oper->system_priority || | |
592 | admin->key != oper->key || | |
593 | (admin->port_state & LACP_STATE_AGGREGATION) | |
594 | != (oper->port_state & LACP_STATE_AGGREGATION)) { | |
595 | port->sm_vars &= ~AD_PORT_SELECTED; | |
596 | } | |
597 | } | |
598 | } | |
599 | ||
600 | /** | |
601 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
602 | * @lacpdu: the lacpdu we've received | |
603 | * @port: the port we're looking at | |
604 | * | |
605 | * Updates the value of the ntt variable, using parameter values from a newly | |
606 | * received lacpdu. The parameter values for the partner carried in the | |
607 | * received PDU are compared with the corresponding operational parameter | |
608 | * values for the Actor. If one or more of the comparisons shows that the | |
609 | * value(s) received in the PDU differ from the current operational values, | |
610 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
611 | */ | |
612 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
613 | { | |
614 | /* validate lacpdu and port */ | |
615 | if (lacpdu && port) { | |
616 | /* check if any parameter is different then | |
617 | * update the port->ntt. | |
618 | */ | |
619 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || | |
620 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
621 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || | |
622 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || | |
623 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
624 | ((lacpdu->partner_state & LACP_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY)) || | |
625 | ((lacpdu->partner_state & LACP_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)) || | |
626 | ((lacpdu->partner_state & LACP_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) || | |
627 | ((lacpdu->partner_state & LACP_STATE_AGGREGATION) != (port->actor_oper_port_state & LACP_STATE_AGGREGATION)) | |
628 | ) { | |
629 | port->ntt = true; | |
630 | } | |
631 | } | |
632 | } | |
633 | ||
634 | /** | |
635 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
636 | * @aggregator: the aggregator we're looking at | |
637 | * | |
638 | */ | |
639 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
640 | { | |
641 | struct port *port; | |
642 | int retval = 1; | |
643 | ||
644 | if (aggregator) { | |
645 | /* scan all ports in this aggregator to verfy if they are | |
646 | * all ready. | |
647 | */ | |
648 | for (port = aggregator->lag_ports; | |
649 | port; | |
650 | port = port->next_port_in_aggregator) { | |
651 | if (!(port->sm_vars & AD_PORT_READY_N)) { | |
652 | retval = 0; | |
653 | break; | |
654 | } | |
655 | } | |
656 | } | |
657 | ||
658 | return retval; | |
659 | } | |
660 | ||
661 | /** | |
662 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
663 | * @aggregator: the aggregator we're looking at | |
664 | * @val: Should the ports' ready bit be set on or off | |
665 | * | |
666 | */ | |
667 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
668 | { | |
669 | struct port *port; | |
670 | ||
671 | for (port = aggregator->lag_ports; port; | |
672 | port = port->next_port_in_aggregator) { | |
673 | if (val) | |
674 | port->sm_vars |= AD_PORT_READY; | |
675 | else | |
676 | port->sm_vars &= ~AD_PORT_READY; | |
677 | } | |
678 | } | |
679 | ||
680 | static int __agg_active_ports(struct aggregator *agg) | |
681 | { | |
682 | struct port *port; | |
683 | int active = 0; | |
684 | ||
685 | for (port = agg->lag_ports; port; | |
686 | port = port->next_port_in_aggregator) { | |
687 | if (port->is_enabled) | |
688 | active++; | |
689 | } | |
690 | ||
691 | return active; | |
692 | } | |
693 | ||
694 | /** | |
695 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
696 | * @aggregator: the aggregator we're looking at | |
697 | * | |
698 | */ | |
699 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
700 | { | |
701 | int nports = __agg_active_ports(aggregator); | |
702 | u32 bandwidth = 0; | |
703 | ||
704 | if (nports) { | |
705 | switch (__get_link_speed(aggregator->lag_ports)) { | |
706 | case AD_LINK_SPEED_1MBPS: | |
707 | bandwidth = nports; | |
708 | break; | |
709 | case AD_LINK_SPEED_10MBPS: | |
710 | bandwidth = nports * 10; | |
711 | break; | |
712 | case AD_LINK_SPEED_100MBPS: | |
713 | bandwidth = nports * 100; | |
714 | break; | |
715 | case AD_LINK_SPEED_1000MBPS: | |
716 | bandwidth = nports * 1000; | |
717 | break; | |
718 | case AD_LINK_SPEED_2500MBPS: | |
719 | bandwidth = nports * 2500; | |
720 | break; | |
721 | case AD_LINK_SPEED_5000MBPS: | |
722 | bandwidth = nports * 5000; | |
723 | break; | |
724 | case AD_LINK_SPEED_10000MBPS: | |
725 | bandwidth = nports * 10000; | |
726 | break; | |
727 | case AD_LINK_SPEED_14000MBPS: | |
728 | bandwidth = nports * 14000; | |
729 | break; | |
730 | case AD_LINK_SPEED_20000MBPS: | |
731 | bandwidth = nports * 20000; | |
732 | break; | |
733 | case AD_LINK_SPEED_25000MBPS: | |
734 | bandwidth = nports * 25000; | |
735 | break; | |
736 | case AD_LINK_SPEED_40000MBPS: | |
737 | bandwidth = nports * 40000; | |
738 | break; | |
739 | case AD_LINK_SPEED_50000MBPS: | |
740 | bandwidth = nports * 50000; | |
741 | break; | |
742 | case AD_LINK_SPEED_56000MBPS: | |
743 | bandwidth = nports * 56000; | |
744 | break; | |
745 | case AD_LINK_SPEED_100000MBPS: | |
746 | bandwidth = nports * 100000; | |
747 | break; | |
748 | case AD_LINK_SPEED_200000MBPS: | |
749 | bandwidth = nports * 200000; | |
750 | break; | |
751 | case AD_LINK_SPEED_400000MBPS: | |
752 | bandwidth = nports * 400000; | |
753 | break; | |
754 | default: | |
755 | bandwidth = 0; /* to silence the compiler */ | |
756 | } | |
757 | } | |
758 | return bandwidth; | |
759 | } | |
760 | ||
761 | /** | |
762 | * __get_active_agg - get the current active aggregator | |
763 | * @aggregator: the aggregator we're looking at | |
764 | * | |
765 | * Caller must hold RCU lock. | |
766 | */ | |
767 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
768 | { | |
769 | struct bonding *bond = aggregator->slave->bond; | |
770 | struct list_head *iter; | |
771 | struct slave *slave; | |
772 | ||
773 | bond_for_each_slave_rcu(bond, slave, iter) | |
774 | if (SLAVE_AD_INFO(slave)->aggregator.is_active) | |
775 | return &(SLAVE_AD_INFO(slave)->aggregator); | |
776 | ||
777 | return NULL; | |
778 | } | |
779 | ||
780 | /** | |
781 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
782 | * @port: the port we're looking at | |
783 | */ | |
784 | static inline void __update_lacpdu_from_port(struct port *port) | |
785 | { | |
786 | struct lacpdu *lacpdu = &port->lacpdu; | |
787 | const struct port_params *partner = &port->partner_oper; | |
788 | ||
789 | /* update current actual Actor parameters | |
790 | * lacpdu->subtype initialized | |
791 | * lacpdu->version_number initialized | |
792 | * lacpdu->tlv_type_actor_info initialized | |
793 | * lacpdu->actor_information_length initialized | |
794 | */ | |
795 | ||
796 | lacpdu->actor_system_priority = htons(port->actor_system_priority); | |
797 | lacpdu->actor_system = port->actor_system; | |
798 | lacpdu->actor_key = htons(port->actor_oper_port_key); | |
799 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
800 | lacpdu->actor_port = htons(port->actor_port_number); | |
801 | lacpdu->actor_state = port->actor_oper_port_state; | |
802 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
803 | "update lacpdu: actor port state %x\n", | |
804 | port->actor_oper_port_state); | |
805 | ||
806 | /* lacpdu->reserved_3_1 initialized | |
807 | * lacpdu->tlv_type_partner_info initialized | |
808 | * lacpdu->partner_information_length initialized | |
809 | */ | |
810 | ||
811 | lacpdu->partner_system_priority = htons(partner->system_priority); | |
812 | lacpdu->partner_system = partner->system; | |
813 | lacpdu->partner_key = htons(partner->key); | |
814 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
815 | lacpdu->partner_port = htons(partner->port_number); | |
816 | lacpdu->partner_state = partner->port_state; | |
817 | ||
818 | /* lacpdu->reserved_3_2 initialized | |
819 | * lacpdu->tlv_type_collector_info initialized | |
820 | * lacpdu->collector_information_length initialized | |
821 | * collector_max_delay initialized | |
822 | * reserved_12[12] initialized | |
823 | * tlv_type_terminator initialized | |
824 | * terminator_length initialized | |
825 | * reserved_50[50] initialized | |
826 | */ | |
827 | } | |
828 | ||
829 | /* ================= main 802.3ad protocol code ========================= */ | |
830 | ||
831 | /** | |
832 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
833 | * @port: the port we're looking at | |
834 | * | |
835 | * Returns: 0 on success | |
836 | * < 0 on error | |
837 | */ | |
838 | static int ad_lacpdu_send(struct port *port) | |
839 | { | |
840 | struct slave *slave = port->slave; | |
841 | struct sk_buff *skb; | |
842 | struct lacpdu_header *lacpdu_header; | |
843 | int length = sizeof(struct lacpdu_header); | |
844 | ||
845 | skb = dev_alloc_skb(length); | |
846 | if (!skb) | |
847 | return -ENOMEM; | |
848 | ||
849 | atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_tx); | |
850 | atomic64_inc(&BOND_AD_INFO(slave->bond).stats.lacpdu_tx); | |
851 | ||
852 | skb->dev = slave->dev; | |
853 | skb_reset_mac_header(skb); | |
854 | skb->network_header = skb->mac_header + ETH_HLEN; | |
855 | skb->protocol = PKT_TYPE_LACPDU; | |
856 | skb->priority = TC_PRIO_CONTROL; | |
857 | ||
858 | lacpdu_header = skb_put(skb, length); | |
859 | ||
860 | ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); | |
861 | /* Note: source address is set to be the member's PERMANENT address, | |
862 | * because we use it to identify loopback lacpdus in receive. | |
863 | */ | |
864 | ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); | |
865 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
866 | ||
867 | lacpdu_header->lacpdu = port->lacpdu; | |
868 | ||
869 | dev_queue_xmit(skb); | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | /** | |
875 | * ad_marker_send - send marker information/response on a given port | |
876 | * @port: the port we're looking at | |
877 | * @marker: marker data to send | |
878 | * | |
879 | * Returns: 0 on success | |
880 | * < 0 on error | |
881 | */ | |
882 | static int ad_marker_send(struct port *port, struct bond_marker *marker) | |
883 | { | |
884 | struct slave *slave = port->slave; | |
885 | struct sk_buff *skb; | |
886 | struct bond_marker_header *marker_header; | |
887 | int length = sizeof(struct bond_marker_header); | |
888 | ||
889 | skb = dev_alloc_skb(length + 16); | |
890 | if (!skb) | |
891 | return -ENOMEM; | |
892 | ||
893 | switch (marker->tlv_type) { | |
894 | case AD_MARKER_INFORMATION_SUBTYPE: | |
895 | atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_tx); | |
896 | atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_tx); | |
897 | break; | |
898 | case AD_MARKER_RESPONSE_SUBTYPE: | |
899 | atomic64_inc(&SLAVE_AD_INFO(slave)->stats.marker_resp_tx); | |
900 | atomic64_inc(&BOND_AD_INFO(slave->bond).stats.marker_resp_tx); | |
901 | break; | |
902 | } | |
903 | ||
904 | skb_reserve(skb, 16); | |
905 | ||
906 | skb->dev = slave->dev; | |
907 | skb_reset_mac_header(skb); | |
908 | skb->network_header = skb->mac_header + ETH_HLEN; | |
909 | skb->protocol = PKT_TYPE_LACPDU; | |
910 | ||
911 | marker_header = skb_put(skb, length); | |
912 | ||
913 | ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); | |
914 | /* Note: source address is set to be the member's PERMANENT address, | |
915 | * because we use it to identify loopback MARKERs in receive. | |
916 | */ | |
917 | ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); | |
918 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
919 | ||
920 | marker_header->marker = *marker; | |
921 | ||
922 | dev_queue_xmit(skb); | |
923 | ||
924 | return 0; | |
925 | } | |
926 | ||
927 | /** | |
928 | * ad_mux_machine - handle a port's mux state machine | |
929 | * @port: the port we're looking at | |
930 | * @update_slave_arr: Does slave array need update? | |
931 | */ | |
932 | static void ad_mux_machine(struct port *port, bool *update_slave_arr) | |
933 | { | |
934 | mux_states_t last_state; | |
935 | ||
936 | /* keep current State Machine state to compare later if it was | |
937 | * changed | |
938 | */ | |
939 | last_state = port->sm_mux_state; | |
940 | ||
941 | if (port->sm_vars & AD_PORT_BEGIN) { | |
942 | port->sm_mux_state = AD_MUX_DETACHED; | |
943 | } else { | |
944 | switch (port->sm_mux_state) { | |
945 | case AD_MUX_DETACHED: | |
946 | if ((port->sm_vars & AD_PORT_SELECTED) | |
947 | || (port->sm_vars & AD_PORT_STANDBY)) | |
948 | /* if SELECTED or STANDBY */ | |
949 | port->sm_mux_state = AD_MUX_WAITING; | |
950 | break; | |
951 | case AD_MUX_WAITING: | |
952 | /* if SELECTED == FALSE return to DETACH state */ | |
953 | if (!(port->sm_vars & AD_PORT_SELECTED)) { | |
954 | port->sm_vars &= ~AD_PORT_READY_N; | |
955 | /* in order to withhold the Selection Logic to | |
956 | * check all ports READY_N value every callback | |
957 | * cycle to update ready variable, we check | |
958 | * READY_N and update READY here | |
959 | */ | |
960 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
961 | port->sm_mux_state = AD_MUX_DETACHED; | |
962 | break; | |
963 | } | |
964 | ||
965 | /* check if the wait_while_timer expired */ | |
966 | if (port->sm_mux_timer_counter | |
967 | && !(--port->sm_mux_timer_counter)) | |
968 | port->sm_vars |= AD_PORT_READY_N; | |
969 | ||
970 | /* in order to withhold the selection logic to check | |
971 | * all ports READY_N value every callback cycle to | |
972 | * update ready variable, we check READY_N and update | |
973 | * READY here | |
974 | */ | |
975 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
976 | ||
977 | /* if the wait_while_timer expired, and the port is | |
978 | * in READY state, move to ATTACHED state | |
979 | */ | |
980 | if ((port->sm_vars & AD_PORT_READY) | |
981 | && !port->sm_mux_timer_counter) | |
982 | port->sm_mux_state = AD_MUX_ATTACHED; | |
983 | break; | |
984 | case AD_MUX_ATTACHED: | |
985 | /* check also if agg_select_timer expired (so the | |
986 | * edable port will take place only after this timer) | |
987 | */ | |
988 | if ((port->sm_vars & AD_PORT_SELECTED) && | |
989 | (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) && | |
990 | !__check_agg_selection_timer(port)) { | |
991 | if (port->aggregator->is_active) | |
992 | port->sm_mux_state = | |
993 | AD_MUX_COLLECTING_DISTRIBUTING; | |
994 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || | |
995 | (port->sm_vars & AD_PORT_STANDBY)) { | |
996 | /* if UNSELECTED or STANDBY */ | |
997 | port->sm_vars &= ~AD_PORT_READY_N; | |
998 | /* in order to withhold the selection logic to | |
999 | * check all ports READY_N value every callback | |
1000 | * cycle to update ready variable, we check | |
1001 | * READY_N and update READY here | |
1002 | */ | |
1003 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1004 | port->sm_mux_state = AD_MUX_DETACHED; | |
1005 | } else if (port->aggregator->is_active) { | |
1006 | port->actor_oper_port_state |= | |
1007 | LACP_STATE_SYNCHRONIZATION; | |
1008 | } | |
1009 | break; | |
1010 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1011 | if (!(port->sm_vars & AD_PORT_SELECTED) || | |
1012 | (port->sm_vars & AD_PORT_STANDBY) || | |
1013 | !(port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) || | |
1014 | !(port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION)) { | |
1015 | port->sm_mux_state = AD_MUX_ATTACHED; | |
1016 | } else { | |
1017 | /* if port state hasn't changed make | |
1018 | * sure that a collecting distributing | |
1019 | * port in an active aggregator is enabled | |
1020 | */ | |
1021 | if (port->aggregator && | |
1022 | port->aggregator->is_active && | |
1023 | !__port_is_enabled(port)) { | |
1024 | __enable_port(port); | |
1025 | *update_slave_arr = true; | |
1026 | } | |
1027 | } | |
1028 | break; | |
1029 | default: | |
1030 | break; | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | /* check if the state machine was changed */ | |
1035 | if (port->sm_mux_state != last_state) { | |
1036 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
1037 | "Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", | |
1038 | port->actor_port_number, | |
1039 | last_state, | |
1040 | port->sm_mux_state); | |
1041 | switch (port->sm_mux_state) { | |
1042 | case AD_MUX_DETACHED: | |
1043 | port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; | |
1044 | ad_disable_collecting_distributing(port, | |
1045 | update_slave_arr); | |
1046 | port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; | |
1047 | port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; | |
1048 | port->ntt = true; | |
1049 | break; | |
1050 | case AD_MUX_WAITING: | |
1051 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
1052 | break; | |
1053 | case AD_MUX_ATTACHED: | |
1054 | if (port->aggregator->is_active) | |
1055 | port->actor_oper_port_state |= | |
1056 | LACP_STATE_SYNCHRONIZATION; | |
1057 | else | |
1058 | port->actor_oper_port_state &= | |
1059 | ~LACP_STATE_SYNCHRONIZATION; | |
1060 | port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; | |
1061 | port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; | |
1062 | ad_disable_collecting_distributing(port, | |
1063 | update_slave_arr); | |
1064 | port->ntt = true; | |
1065 | break; | |
1066 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1067 | port->actor_oper_port_state |= LACP_STATE_COLLECTING; | |
1068 | port->actor_oper_port_state |= LACP_STATE_DISTRIBUTING; | |
1069 | port->actor_oper_port_state |= LACP_STATE_SYNCHRONIZATION; | |
1070 | ad_enable_collecting_distributing(port, | |
1071 | update_slave_arr); | |
1072 | port->ntt = true; | |
1073 | break; | |
1074 | default: | |
1075 | break; | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | /** | |
1081 | * ad_rx_machine - handle a port's rx State Machine | |
1082 | * @lacpdu: the lacpdu we've received | |
1083 | * @port: the port we're looking at | |
1084 | * | |
1085 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
1086 | * CURRENT. If timer expired set the state machine in the proper state. | |
1087 | * In other cases, this function checks if we need to switch to other state. | |
1088 | */ | |
1089 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
1090 | { | |
1091 | rx_states_t last_state; | |
1092 | ||
1093 | /* keep current State Machine state to compare later if it was | |
1094 | * changed | |
1095 | */ | |
1096 | last_state = port->sm_rx_state; | |
1097 | ||
1098 | if (lacpdu) { | |
1099 | atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.lacpdu_rx); | |
1100 | atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.lacpdu_rx); | |
1101 | } | |
1102 | /* check if state machine should change state */ | |
1103 | ||
1104 | /* first, check if port was reinitialized */ | |
1105 | if (port->sm_vars & AD_PORT_BEGIN) { | |
1106 | port->sm_rx_state = AD_RX_INITIALIZE; | |
1107 | port->sm_vars |= AD_PORT_CHURNED; | |
1108 | /* check if port is not enabled */ | |
1109 | } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) | |
1110 | port->sm_rx_state = AD_RX_PORT_DISABLED; | |
1111 | /* check if new lacpdu arrived */ | |
1112 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || | |
1113 | (port->sm_rx_state == AD_RX_DEFAULTED) || | |
1114 | (port->sm_rx_state == AD_RX_CURRENT))) { | |
1115 | if (port->sm_rx_state != AD_RX_CURRENT) | |
1116 | port->sm_vars |= AD_PORT_CHURNED; | |
1117 | port->sm_rx_timer_counter = 0; | |
1118 | port->sm_rx_state = AD_RX_CURRENT; | |
1119 | } else { | |
1120 | /* if timer is on, and if it is expired */ | |
1121 | if (port->sm_rx_timer_counter && | |
1122 | !(--port->sm_rx_timer_counter)) { | |
1123 | switch (port->sm_rx_state) { | |
1124 | case AD_RX_EXPIRED: | |
1125 | port->sm_rx_state = AD_RX_DEFAULTED; | |
1126 | break; | |
1127 | case AD_RX_CURRENT: | |
1128 | port->sm_rx_state = AD_RX_EXPIRED; | |
1129 | break; | |
1130 | default: | |
1131 | break; | |
1132 | } | |
1133 | } else { | |
1134 | /* if no lacpdu arrived and no timer is on */ | |
1135 | switch (port->sm_rx_state) { | |
1136 | case AD_RX_PORT_DISABLED: | |
1137 | if (port->is_enabled && | |
1138 | (port->sm_vars & AD_PORT_LACP_ENABLED)) | |
1139 | port->sm_rx_state = AD_RX_EXPIRED; | |
1140 | else if (port->is_enabled | |
1141 | && ((port->sm_vars | |
1142 | & AD_PORT_LACP_ENABLED) == 0)) | |
1143 | port->sm_rx_state = AD_RX_LACP_DISABLED; | |
1144 | break; | |
1145 | default: | |
1146 | break; | |
1147 | ||
1148 | } | |
1149 | } | |
1150 | } | |
1151 | ||
1152 | /* check if the State machine was changed or new lacpdu arrived */ | |
1153 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
1154 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
1155 | "Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", | |
1156 | port->actor_port_number, | |
1157 | last_state, | |
1158 | port->sm_rx_state); | |
1159 | switch (port->sm_rx_state) { | |
1160 | case AD_RX_INITIALIZE: | |
1161 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) | |
1162 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
1163 | else | |
1164 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
1165 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1166 | __record_default(port); | |
1167 | port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; | |
1168 | port->sm_rx_state = AD_RX_PORT_DISABLED; | |
1169 | ||
1170 | fallthrough; | |
1171 | case AD_RX_PORT_DISABLED: | |
1172 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1173 | break; | |
1174 | case AD_RX_LACP_DISABLED: | |
1175 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1176 | __record_default(port); | |
1177 | port->partner_oper.port_state &= ~LACP_STATE_AGGREGATION; | |
1178 | port->sm_vars |= AD_PORT_MATCHED; | |
1179 | port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; | |
1180 | break; | |
1181 | case AD_RX_EXPIRED: | |
1182 | /* Reset of the Synchronization flag (Standard 43.4.12) | |
1183 | * This reset cause to disable this port in the | |
1184 | * COLLECTING_DISTRIBUTING state of the mux machine in | |
1185 | * case of EXPIRED even if LINK_DOWN didn't arrive for | |
1186 | * the port. | |
1187 | */ | |
1188 | port->partner_oper.port_state &= ~LACP_STATE_SYNCHRONIZATION; | |
1189 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1190 | port->partner_oper.port_state |= LACP_STATE_LACP_TIMEOUT; | |
1191 | port->partner_oper.port_state |= LACP_STATE_LACP_ACTIVITY; | |
1192 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); | |
1193 | port->actor_oper_port_state |= LACP_STATE_EXPIRED; | |
1194 | port->sm_vars |= AD_PORT_CHURNED; | |
1195 | break; | |
1196 | case AD_RX_DEFAULTED: | |
1197 | __update_default_selected(port); | |
1198 | __record_default(port); | |
1199 | port->sm_vars |= AD_PORT_MATCHED; | |
1200 | port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; | |
1201 | break; | |
1202 | case AD_RX_CURRENT: | |
1203 | /* detect loopback situation */ | |
1204 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), | |
1205 | &(port->actor_system))) { | |
1206 | slave_err(port->slave->bond->dev, port->slave->dev, "An illegal loopback occurred on slave\n" | |
1207 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n"); | |
1208 | return; | |
1209 | } | |
1210 | __update_selected(lacpdu, port); | |
1211 | __update_ntt(lacpdu, port); | |
1212 | __record_pdu(lacpdu, port); | |
1213 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & LACP_STATE_LACP_TIMEOUT)); | |
1214 | port->actor_oper_port_state &= ~LACP_STATE_EXPIRED; | |
1215 | break; | |
1216 | default: | |
1217 | break; | |
1218 | } | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | /** | |
1223 | * ad_churn_machine - handle port churn's state machine | |
1224 | * @port: the port we're looking at | |
1225 | * | |
1226 | */ | |
1227 | static void ad_churn_machine(struct port *port) | |
1228 | { | |
1229 | if (port->sm_vars & AD_PORT_CHURNED) { | |
1230 | port->sm_vars &= ~AD_PORT_CHURNED; | |
1231 | port->sm_churn_actor_state = AD_CHURN_MONITOR; | |
1232 | port->sm_churn_partner_state = AD_CHURN_MONITOR; | |
1233 | port->sm_churn_actor_timer_counter = | |
1234 | __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); | |
1235 | port->sm_churn_partner_timer_counter = | |
1236 | __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); | |
1237 | return; | |
1238 | } | |
1239 | if (port->sm_churn_actor_timer_counter && | |
1240 | !(--port->sm_churn_actor_timer_counter) && | |
1241 | port->sm_churn_actor_state == AD_CHURN_MONITOR) { | |
1242 | if (port->actor_oper_port_state & LACP_STATE_SYNCHRONIZATION) { | |
1243 | port->sm_churn_actor_state = AD_NO_CHURN; | |
1244 | } else { | |
1245 | port->churn_actor_count++; | |
1246 | port->sm_churn_actor_state = AD_CHURN; | |
1247 | } | |
1248 | } | |
1249 | if (port->sm_churn_partner_timer_counter && | |
1250 | !(--port->sm_churn_partner_timer_counter) && | |
1251 | port->sm_churn_partner_state == AD_CHURN_MONITOR) { | |
1252 | if (port->partner_oper.port_state & LACP_STATE_SYNCHRONIZATION) { | |
1253 | port->sm_churn_partner_state = AD_NO_CHURN; | |
1254 | } else { | |
1255 | port->churn_partner_count++; | |
1256 | port->sm_churn_partner_state = AD_CHURN; | |
1257 | } | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | /** | |
1262 | * ad_tx_machine - handle a port's tx state machine | |
1263 | * @port: the port we're looking at | |
1264 | */ | |
1265 | static void ad_tx_machine(struct port *port) | |
1266 | { | |
1267 | /* check if tx timer expired, to verify that we do not send more than | |
1268 | * 3 packets per second | |
1269 | */ | |
1270 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1271 | /* check if there is something to send */ | |
1272 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1273 | __update_lacpdu_from_port(port); | |
1274 | ||
1275 | if (ad_lacpdu_send(port) >= 0) { | |
1276 | slave_dbg(port->slave->bond->dev, | |
1277 | port->slave->dev, | |
1278 | "Sent LACPDU on port %d\n", | |
1279 | port->actor_port_number); | |
1280 | ||
1281 | /* mark ntt as false, so it will not be sent | |
1282 | * again until demanded | |
1283 | */ | |
1284 | port->ntt = false; | |
1285 | } | |
1286 | } | |
1287 | /* restart tx timer(to verify that we will not exceed | |
1288 | * AD_MAX_TX_IN_SECOND | |
1289 | */ | |
1290 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | /** | |
1295 | * ad_periodic_machine - handle a port's periodic state machine | |
1296 | * @port: the port we're looking at | |
1297 | * @bond_params: bond parameters we will use | |
1298 | * | |
1299 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1300 | */ | |
1301 | static void ad_periodic_machine(struct port *port, struct bond_params *bond_params) | |
1302 | { | |
1303 | periodic_states_t last_state; | |
1304 | ||
1305 | /* keep current state machine state to compare later if it was changed */ | |
1306 | last_state = port->sm_periodic_state; | |
1307 | ||
1308 | /* check if port was reinitialized */ | |
1309 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || | |
1310 | (!(port->actor_oper_port_state & LACP_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & LACP_STATE_LACP_ACTIVITY)) || | |
1311 | !bond_params->lacp_active) { | |
1312 | port->sm_periodic_state = AD_NO_PERIODIC; | |
1313 | } | |
1314 | /* check if state machine should change state */ | |
1315 | else if (port->sm_periodic_timer_counter) { | |
1316 | /* check if periodic state machine expired */ | |
1317 | if (!(--port->sm_periodic_timer_counter)) { | |
1318 | /* if expired then do tx */ | |
1319 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1320 | } else { | |
1321 | /* If not expired, check if there is some new timeout | |
1322 | * parameter from the partner state | |
1323 | */ | |
1324 | switch (port->sm_periodic_state) { | |
1325 | case AD_FAST_PERIODIC: | |
1326 | if (!(port->partner_oper.port_state | |
1327 | & LACP_STATE_LACP_TIMEOUT)) | |
1328 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
1329 | break; | |
1330 | case AD_SLOW_PERIODIC: | |
1331 | if ((port->partner_oper.port_state & LACP_STATE_LACP_TIMEOUT)) { | |
1332 | port->sm_periodic_timer_counter = 0; | |
1333 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1334 | } | |
1335 | break; | |
1336 | default: | |
1337 | break; | |
1338 | } | |
1339 | } | |
1340 | } else { | |
1341 | switch (port->sm_periodic_state) { | |
1342 | case AD_NO_PERIODIC: | |
1343 | port->sm_periodic_state = AD_FAST_PERIODIC; | |
1344 | break; | |
1345 | case AD_PERIODIC_TX: | |
1346 | if (!(port->partner_oper.port_state & | |
1347 | LACP_STATE_LACP_TIMEOUT)) | |
1348 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
1349 | else | |
1350 | port->sm_periodic_state = AD_FAST_PERIODIC; | |
1351 | break; | |
1352 | default: | |
1353 | break; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | /* check if the state machine was changed */ | |
1358 | if (port->sm_periodic_state != last_state) { | |
1359 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
1360 | "Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", | |
1361 | port->actor_port_number, last_state, | |
1362 | port->sm_periodic_state); | |
1363 | switch (port->sm_periodic_state) { | |
1364 | case AD_NO_PERIODIC: | |
1365 | port->sm_periodic_timer_counter = 0; | |
1366 | break; | |
1367 | case AD_FAST_PERIODIC: | |
1368 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ | |
1369 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; | |
1370 | break; | |
1371 | case AD_SLOW_PERIODIC: | |
1372 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ | |
1373 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; | |
1374 | break; | |
1375 | case AD_PERIODIC_TX: | |
1376 | port->ntt = true; | |
1377 | break; | |
1378 | default: | |
1379 | break; | |
1380 | } | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | /** | |
1385 | * ad_port_selection_logic - select aggregation groups | |
1386 | * @port: the port we're looking at | |
1387 | * @update_slave_arr: Does slave array need update? | |
1388 | * | |
1389 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1390 | * selection logic is called in the inititalization (after all the handshkes), | |
1391 | * and after every lacpdu receive (if selected is off). | |
1392 | */ | |
1393 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) | |
1394 | { | |
1395 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1396 | struct port *last_port = NULL, *curr_port; | |
1397 | struct list_head *iter; | |
1398 | struct bonding *bond; | |
1399 | struct slave *slave; | |
1400 | int found = 0; | |
1401 | ||
1402 | /* if the port is already Selected, do nothing */ | |
1403 | if (port->sm_vars & AD_PORT_SELECTED) | |
1404 | return; | |
1405 | ||
1406 | bond = __get_bond_by_port(port); | |
1407 | ||
1408 | /* if the port is connected to other aggregator, detach it */ | |
1409 | if (port->aggregator) { | |
1410 | /* detach the port from its former aggregator */ | |
1411 | temp_aggregator = port->aggregator; | |
1412 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1413 | last_port = curr_port, | |
1414 | curr_port = curr_port->next_port_in_aggregator) { | |
1415 | if (curr_port == port) { | |
1416 | temp_aggregator->num_of_ports--; | |
1417 | /* if it is the first port attached to the | |
1418 | * aggregator | |
1419 | */ | |
1420 | if (!last_port) { | |
1421 | temp_aggregator->lag_ports = | |
1422 | port->next_port_in_aggregator; | |
1423 | } else { | |
1424 | /* not the first port attached to the | |
1425 | * aggregator | |
1426 | */ | |
1427 | last_port->next_port_in_aggregator = | |
1428 | port->next_port_in_aggregator; | |
1429 | } | |
1430 | ||
1431 | /* clear the port's relations to this | |
1432 | * aggregator | |
1433 | */ | |
1434 | port->aggregator = NULL; | |
1435 | port->next_port_in_aggregator = NULL; | |
1436 | port->actor_port_aggregator_identifier = 0; | |
1437 | ||
1438 | slave_dbg(bond->dev, port->slave->dev, "Port %d left LAG %d\n", | |
1439 | port->actor_port_number, | |
1440 | temp_aggregator->aggregator_identifier); | |
1441 | /* if the aggregator is empty, clear its | |
1442 | * parameters, and set it ready to be attached | |
1443 | */ | |
1444 | if (!temp_aggregator->lag_ports) | |
1445 | ad_clear_agg(temp_aggregator); | |
1446 | break; | |
1447 | } | |
1448 | } | |
1449 | if (!curr_port) { | |
1450 | /* meaning: the port was related to an aggregator | |
1451 | * but was not on the aggregator port list | |
1452 | */ | |
1453 | net_warn_ratelimited("%s: (slave %s): Warning: Port %d was related to aggregator %d but was not on its port list\n", | |
1454 | port->slave->bond->dev->name, | |
1455 | port->slave->dev->name, | |
1456 | port->actor_port_number, | |
1457 | port->aggregator->aggregator_identifier); | |
1458 | } | |
1459 | } | |
1460 | /* search on all aggregators for a suitable aggregator for this port */ | |
1461 | bond_for_each_slave(bond, slave, iter) { | |
1462 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); | |
1463 | ||
1464 | /* keep a free aggregator for later use(if needed) */ | |
1465 | if (!aggregator->lag_ports) { | |
1466 | if (!free_aggregator) | |
1467 | free_aggregator = aggregator; | |
1468 | continue; | |
1469 | } | |
1470 | /* check if current aggregator suits us */ | |
1471 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1472 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1473 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && | |
1474 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1475 | ) && | |
1476 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ | |
1477 | !aggregator->is_individual) /* but is not individual OR */ | |
1478 | ) | |
1479 | ) { | |
1480 | /* attach to the founded aggregator */ | |
1481 | port->aggregator = aggregator; | |
1482 | port->actor_port_aggregator_identifier = | |
1483 | port->aggregator->aggregator_identifier; | |
1484 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1485 | port->aggregator->num_of_ports++; | |
1486 | aggregator->lag_ports = port; | |
1487 | slave_dbg(bond->dev, slave->dev, "Port %d joined LAG %d (existing LAG)\n", | |
1488 | port->actor_port_number, | |
1489 | port->aggregator->aggregator_identifier); | |
1490 | ||
1491 | /* mark this port as selected */ | |
1492 | port->sm_vars |= AD_PORT_SELECTED; | |
1493 | found = 1; | |
1494 | break; | |
1495 | } | |
1496 | } | |
1497 | ||
1498 | /* the port couldn't find an aggregator - attach it to a new | |
1499 | * aggregator | |
1500 | */ | |
1501 | if (!found) { | |
1502 | if (free_aggregator) { | |
1503 | /* assign port a new aggregator */ | |
1504 | port->aggregator = free_aggregator; | |
1505 | port->actor_port_aggregator_identifier = | |
1506 | port->aggregator->aggregator_identifier; | |
1507 | ||
1508 | /* update the new aggregator's parameters | |
1509 | * if port was responsed from the end-user | |
1510 | */ | |
1511 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) | |
1512 | /* if port is full duplex */ | |
1513 | port->aggregator->is_individual = false; | |
1514 | else | |
1515 | port->aggregator->is_individual = true; | |
1516 | ||
1517 | port->aggregator->actor_admin_aggregator_key = | |
1518 | port->actor_admin_port_key; | |
1519 | port->aggregator->actor_oper_aggregator_key = | |
1520 | port->actor_oper_port_key; | |
1521 | port->aggregator->partner_system = | |
1522 | port->partner_oper.system; | |
1523 | port->aggregator->partner_system_priority = | |
1524 | port->partner_oper.system_priority; | |
1525 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; | |
1526 | port->aggregator->receive_state = 1; | |
1527 | port->aggregator->transmit_state = 1; | |
1528 | port->aggregator->lag_ports = port; | |
1529 | port->aggregator->num_of_ports++; | |
1530 | ||
1531 | /* mark this port as selected */ | |
1532 | port->sm_vars |= AD_PORT_SELECTED; | |
1533 | ||
1534 | slave_dbg(bond->dev, port->slave->dev, "Port %d joined LAG %d (new LAG)\n", | |
1535 | port->actor_port_number, | |
1536 | port->aggregator->aggregator_identifier); | |
1537 | } else { | |
1538 | slave_err(bond->dev, port->slave->dev, | |
1539 | "Port %d did not find a suitable aggregator\n", | |
1540 | port->actor_port_number); | |
1541 | } | |
1542 | } | |
1543 | /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE | |
1544 | * in all aggregator's ports, else set ready=FALSE in all | |
1545 | * aggregator's ports | |
1546 | */ | |
1547 | __set_agg_ports_ready(port->aggregator, | |
1548 | __agg_ports_are_ready(port->aggregator)); | |
1549 | ||
1550 | aggregator = __get_first_agg(port); | |
1551 | ad_agg_selection_logic(aggregator, update_slave_arr); | |
1552 | ||
1553 | if (!port->aggregator->is_active) | |
1554 | port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; | |
1555 | } | |
1556 | ||
1557 | /* Decide if "agg" is a better choice for the new active aggregator that | |
1558 | * the current best, according to the ad_select policy. | |
1559 | */ | |
1560 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1561 | struct aggregator *curr) | |
1562 | { | |
1563 | /* 0. If no best, select current. | |
1564 | * | |
1565 | * 1. If the current agg is not individual, and the best is | |
1566 | * individual, select current. | |
1567 | * | |
1568 | * 2. If current agg is individual and the best is not, keep best. | |
1569 | * | |
1570 | * 3. Therefore, current and best are both individual or both not | |
1571 | * individual, so: | |
1572 | * | |
1573 | * 3a. If current agg partner replied, and best agg partner did not, | |
1574 | * select current. | |
1575 | * | |
1576 | * 3b. If current agg partner did not reply and best agg partner | |
1577 | * did reply, keep best. | |
1578 | * | |
1579 | * 4. Therefore, current and best both have partner replies or | |
1580 | * both do not, so perform selection policy: | |
1581 | * | |
1582 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1583 | * select by bandwidth. | |
1584 | * | |
1585 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1586 | */ | |
1587 | if (!best) | |
1588 | return curr; | |
1589 | ||
1590 | if (!curr->is_individual && best->is_individual) | |
1591 | return curr; | |
1592 | ||
1593 | if (curr->is_individual && !best->is_individual) | |
1594 | return best; | |
1595 | ||
1596 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1597 | return curr; | |
1598 | ||
1599 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1600 | return best; | |
1601 | ||
1602 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1603 | case BOND_AD_COUNT: | |
1604 | if (__agg_active_ports(curr) > __agg_active_ports(best)) | |
1605 | return curr; | |
1606 | ||
1607 | if (__agg_active_ports(curr) < __agg_active_ports(best)) | |
1608 | return best; | |
1609 | ||
1610 | fallthrough; | |
1611 | case BOND_AD_STABLE: | |
1612 | case BOND_AD_BANDWIDTH: | |
1613 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1614 | return curr; | |
1615 | ||
1616 | break; | |
1617 | ||
1618 | default: | |
1619 | net_warn_ratelimited("%s: (slave %s): Impossible agg select mode %d\n", | |
1620 | curr->slave->bond->dev->name, | |
1621 | curr->slave->dev->name, | |
1622 | __get_agg_selection_mode(curr->lag_ports)); | |
1623 | break; | |
1624 | } | |
1625 | ||
1626 | return best; | |
1627 | } | |
1628 | ||
1629 | static int agg_device_up(const struct aggregator *agg) | |
1630 | { | |
1631 | struct port *port = agg->lag_ports; | |
1632 | ||
1633 | if (!port) | |
1634 | return 0; | |
1635 | ||
1636 | for (port = agg->lag_ports; port; | |
1637 | port = port->next_port_in_aggregator) { | |
1638 | if (netif_running(port->slave->dev) && | |
1639 | netif_carrier_ok(port->slave->dev)) | |
1640 | return 1; | |
1641 | } | |
1642 | ||
1643 | return 0; | |
1644 | } | |
1645 | ||
1646 | /** | |
1647 | * ad_agg_selection_logic - select an aggregation group for a team | |
1648 | * @agg: the aggregator we're looking at | |
1649 | * @update_slave_arr: Does slave array need update? | |
1650 | * | |
1651 | * It is assumed that only one aggregator may be selected for a team. | |
1652 | * | |
1653 | * The logic of this function is to select the aggregator according to | |
1654 | * the ad_select policy: | |
1655 | * | |
1656 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1657 | * it, and to reselect the active aggregator only if the previous | |
1658 | * aggregator has no more ports related to it. | |
1659 | * | |
1660 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1661 | * bandwidth, and reselect whenever a link state change takes place or the | |
1662 | * set of slaves in the bond changes. | |
1663 | * | |
1664 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1665 | * (slaves), and reselect whenever a link state change takes place or the | |
1666 | * set of slaves in the bond changes. | |
1667 | * | |
1668 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1669 | * __get_active_agg() won't work correctly. This function should be better | |
1670 | * called with the bond itself, and retrieve the first agg from it. | |
1671 | */ | |
1672 | static void ad_agg_selection_logic(struct aggregator *agg, | |
1673 | bool *update_slave_arr) | |
1674 | { | |
1675 | struct aggregator *best, *active, *origin; | |
1676 | struct bonding *bond = agg->slave->bond; | |
1677 | struct list_head *iter; | |
1678 | struct slave *slave; | |
1679 | struct port *port; | |
1680 | ||
1681 | rcu_read_lock(); | |
1682 | origin = agg; | |
1683 | active = __get_active_agg(agg); | |
1684 | best = (active && agg_device_up(active)) ? active : NULL; | |
1685 | ||
1686 | bond_for_each_slave_rcu(bond, slave, iter) { | |
1687 | agg = &(SLAVE_AD_INFO(slave)->aggregator); | |
1688 | ||
1689 | agg->is_active = 0; | |
1690 | ||
1691 | if (__agg_active_ports(agg) && agg_device_up(agg)) | |
1692 | best = ad_agg_selection_test(best, agg); | |
1693 | } | |
1694 | ||
1695 | if (best && | |
1696 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
1697 | /* For the STABLE policy, don't replace the old active | |
1698 | * aggregator if it's still active (it has an answering | |
1699 | * partner) or if both the best and active don't have an | |
1700 | * answering partner. | |
1701 | */ | |
1702 | if (active && active->lag_ports && | |
1703 | __agg_active_ports(active) && | |
1704 | (__agg_has_partner(active) || | |
1705 | (!__agg_has_partner(active) && | |
1706 | !__agg_has_partner(best)))) { | |
1707 | if (!(!active->actor_oper_aggregator_key && | |
1708 | best->actor_oper_aggregator_key)) { | |
1709 | best = NULL; | |
1710 | active->is_active = 1; | |
1711 | } | |
1712 | } | |
1713 | } | |
1714 | ||
1715 | if (best && (best == active)) { | |
1716 | best = NULL; | |
1717 | active->is_active = 1; | |
1718 | } | |
1719 | ||
1720 | /* if there is new best aggregator, activate it */ | |
1721 | if (best) { | |
1722 | netdev_dbg(bond->dev, "(slave %s): best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1723 | best->slave ? best->slave->dev->name : "NULL", | |
1724 | best->aggregator_identifier, best->num_of_ports, | |
1725 | best->actor_oper_aggregator_key, | |
1726 | best->partner_oper_aggregator_key, | |
1727 | best->is_individual, best->is_active); | |
1728 | netdev_dbg(bond->dev, "(slave %s): best ports %p slave %p\n", | |
1729 | best->slave ? best->slave->dev->name : "NULL", | |
1730 | best->lag_ports, best->slave); | |
1731 | ||
1732 | bond_for_each_slave_rcu(bond, slave, iter) { | |
1733 | agg = &(SLAVE_AD_INFO(slave)->aggregator); | |
1734 | ||
1735 | slave_dbg(bond->dev, slave->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1736 | agg->aggregator_identifier, agg->num_of_ports, | |
1737 | agg->actor_oper_aggregator_key, | |
1738 | agg->partner_oper_aggregator_key, | |
1739 | agg->is_individual, agg->is_active); | |
1740 | } | |
1741 | ||
1742 | /* check if any partner replies */ | |
1743 | if (best->is_individual) | |
1744 | net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", | |
1745 | bond->dev->name); | |
1746 | ||
1747 | best->is_active = 1; | |
1748 | netdev_dbg(bond->dev, "(slave %s): LAG %d chosen as the active LAG\n", | |
1749 | best->slave ? best->slave->dev->name : "NULL", | |
1750 | best->aggregator_identifier); | |
1751 | netdev_dbg(bond->dev, "(slave %s): Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1752 | best->slave ? best->slave->dev->name : "NULL", | |
1753 | best->aggregator_identifier, best->num_of_ports, | |
1754 | best->actor_oper_aggregator_key, | |
1755 | best->partner_oper_aggregator_key, | |
1756 | best->is_individual, best->is_active); | |
1757 | ||
1758 | /* disable the ports that were related to the former | |
1759 | * active_aggregator | |
1760 | */ | |
1761 | if (active) { | |
1762 | for (port = active->lag_ports; port; | |
1763 | port = port->next_port_in_aggregator) { | |
1764 | __disable_port(port); | |
1765 | } | |
1766 | } | |
1767 | /* Slave array needs update. */ | |
1768 | *update_slave_arr = true; | |
1769 | } | |
1770 | ||
1771 | /* if the selected aggregator is of join individuals | |
1772 | * (partner_system is NULL), enable their ports | |
1773 | */ | |
1774 | active = __get_active_agg(origin); | |
1775 | ||
1776 | if (active) { | |
1777 | if (!__agg_has_partner(active)) { | |
1778 | for (port = active->lag_ports; port; | |
1779 | port = port->next_port_in_aggregator) { | |
1780 | __enable_port(port); | |
1781 | } | |
1782 | *update_slave_arr = true; | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | rcu_read_unlock(); | |
1787 | ||
1788 | bond_3ad_set_carrier(bond); | |
1789 | } | |
1790 | ||
1791 | /** | |
1792 | * ad_clear_agg - clear a given aggregator's parameters | |
1793 | * @aggregator: the aggregator we're looking at | |
1794 | */ | |
1795 | static void ad_clear_agg(struct aggregator *aggregator) | |
1796 | { | |
1797 | if (aggregator) { | |
1798 | aggregator->is_individual = false; | |
1799 | aggregator->actor_admin_aggregator_key = 0; | |
1800 | aggregator->actor_oper_aggregator_key = 0; | |
1801 | eth_zero_addr(aggregator->partner_system.mac_addr_value); | |
1802 | aggregator->partner_system_priority = 0; | |
1803 | aggregator->partner_oper_aggregator_key = 0; | |
1804 | aggregator->receive_state = 0; | |
1805 | aggregator->transmit_state = 0; | |
1806 | aggregator->lag_ports = NULL; | |
1807 | aggregator->is_active = 0; | |
1808 | aggregator->num_of_ports = 0; | |
1809 | pr_debug("%s: LAG %d was cleared\n", | |
1810 | aggregator->slave ? | |
1811 | aggregator->slave->dev->name : "NULL", | |
1812 | aggregator->aggregator_identifier); | |
1813 | } | |
1814 | } | |
1815 | ||
1816 | /** | |
1817 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1818 | * @aggregator: the aggregator we're looking at | |
1819 | */ | |
1820 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1821 | { | |
1822 | if (aggregator) { | |
1823 | ad_clear_agg(aggregator); | |
1824 | ||
1825 | eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); | |
1826 | aggregator->aggregator_identifier = 0; | |
1827 | aggregator->slave = NULL; | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | /** | |
1832 | * ad_initialize_port - initialize a given port's parameters | |
1833 | * @port: the port we're looking at | |
1834 | * @lacp_fast: boolean. whether fast periodic should be used | |
1835 | */ | |
1836 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1837 | { | |
1838 | static const struct port_params tmpl = { | |
1839 | .system_priority = 0xffff, | |
1840 | .key = 1, | |
1841 | .port_number = 1, | |
1842 | .port_priority = 0xff, | |
1843 | .port_state = 1, | |
1844 | }; | |
1845 | static const struct lacpdu lacpdu = { | |
1846 | .subtype = 0x01, | |
1847 | .version_number = 0x01, | |
1848 | .tlv_type_actor_info = 0x01, | |
1849 | .actor_information_length = 0x14, | |
1850 | .tlv_type_partner_info = 0x02, | |
1851 | .partner_information_length = 0x14, | |
1852 | .tlv_type_collector_info = 0x03, | |
1853 | .collector_information_length = 0x10, | |
1854 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1855 | }; | |
1856 | ||
1857 | if (port) { | |
1858 | port->actor_port_priority = 0xff; | |
1859 | port->actor_port_aggregator_identifier = 0; | |
1860 | port->ntt = false; | |
1861 | port->actor_admin_port_state = LACP_STATE_AGGREGATION | | |
1862 | LACP_STATE_LACP_ACTIVITY; | |
1863 | port->actor_oper_port_state = LACP_STATE_AGGREGATION | | |
1864 | LACP_STATE_LACP_ACTIVITY; | |
1865 | ||
1866 | if (lacp_fast) | |
1867 | port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; | |
1868 | ||
1869 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); | |
1870 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1871 | ||
1872 | port->is_enabled = true; | |
1873 | /* private parameters */ | |
1874 | port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; | |
1875 | port->sm_rx_state = 0; | |
1876 | port->sm_rx_timer_counter = 0; | |
1877 | port->sm_periodic_state = 0; | |
1878 | port->sm_periodic_timer_counter = 0; | |
1879 | port->sm_mux_state = 0; | |
1880 | port->sm_mux_timer_counter = 0; | |
1881 | port->sm_tx_state = 0; | |
1882 | port->aggregator = NULL; | |
1883 | port->next_port_in_aggregator = NULL; | |
1884 | port->transaction_id = 0; | |
1885 | ||
1886 | port->sm_churn_actor_timer_counter = 0; | |
1887 | port->sm_churn_actor_state = 0; | |
1888 | port->churn_actor_count = 0; | |
1889 | port->sm_churn_partner_timer_counter = 0; | |
1890 | port->sm_churn_partner_state = 0; | |
1891 | port->churn_partner_count = 0; | |
1892 | ||
1893 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | /** | |
1898 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1899 | * @port: the port we're looking at | |
1900 | * @update_slave_arr: Does slave array need update? | |
1901 | * | |
1902 | * Enable @port if it's in an active aggregator | |
1903 | */ | |
1904 | static void ad_enable_collecting_distributing(struct port *port, | |
1905 | bool *update_slave_arr) | |
1906 | { | |
1907 | if (port->aggregator->is_active) { | |
1908 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
1909 | "Enabling port %d (LAG %d)\n", | |
1910 | port->actor_port_number, | |
1911 | port->aggregator->aggregator_identifier); | |
1912 | __enable_port(port); | |
1913 | /* Slave array needs update */ | |
1914 | *update_slave_arr = true; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | /** | |
1919 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1920 | * @port: the port we're looking at | |
1921 | * @update_slave_arr: Does slave array need update? | |
1922 | */ | |
1923 | static void ad_disable_collecting_distributing(struct port *port, | |
1924 | bool *update_slave_arr) | |
1925 | { | |
1926 | if (port->aggregator && | |
1927 | !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), | |
1928 | &(null_mac_addr))) { | |
1929 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
1930 | "Disabling port %d (LAG %d)\n", | |
1931 | port->actor_port_number, | |
1932 | port->aggregator->aggregator_identifier); | |
1933 | __disable_port(port); | |
1934 | /* Slave array needs an update */ | |
1935 | *update_slave_arr = true; | |
1936 | } | |
1937 | } | |
1938 | ||
1939 | /** | |
1940 | * ad_marker_info_received - handle receive of a Marker information frame | |
1941 | * @marker_info: Marker info received | |
1942 | * @port: the port we're looking at | |
1943 | */ | |
1944 | static void ad_marker_info_received(struct bond_marker *marker_info, | |
1945 | struct port *port) | |
1946 | { | |
1947 | struct bond_marker marker; | |
1948 | ||
1949 | atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_rx); | |
1950 | atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_rx); | |
1951 | ||
1952 | /* copy the received marker data to the response marker */ | |
1953 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); | |
1954 | /* change the marker subtype to marker response */ | |
1955 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; | |
1956 | ||
1957 | /* send the marker response */ | |
1958 | if (ad_marker_send(port, &marker) >= 0) | |
1959 | slave_dbg(port->slave->bond->dev, port->slave->dev, | |
1960 | "Sent Marker Response on port %d\n", | |
1961 | port->actor_port_number); | |
1962 | } | |
1963 | ||
1964 | /** | |
1965 | * ad_marker_response_received - handle receive of a marker response frame | |
1966 | * @marker: marker PDU received | |
1967 | * @port: the port we're looking at | |
1968 | * | |
1969 | * This function does nothing since we decided not to implement send and handle | |
1970 | * response for marker PDU's, in this stage, but only to respond to marker | |
1971 | * information. | |
1972 | */ | |
1973 | static void ad_marker_response_received(struct bond_marker *marker, | |
1974 | struct port *port) | |
1975 | { | |
1976 | atomic64_inc(&SLAVE_AD_INFO(port->slave)->stats.marker_resp_rx); | |
1977 | atomic64_inc(&BOND_AD_INFO(port->slave->bond).stats.marker_resp_rx); | |
1978 | ||
1979 | /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ | |
1980 | } | |
1981 | ||
1982 | /* ========= AD exported functions to the main bonding code ========= */ | |
1983 | ||
1984 | /* Check aggregators status in team every T seconds */ | |
1985 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1986 | ||
1987 | /** | |
1988 | * bond_3ad_initiate_agg_selection - initate aggregator selection | |
1989 | * @bond: bonding struct | |
1990 | * @timeout: timeout value to set | |
1991 | * | |
1992 | * Set the aggregation selection timer, to initiate an agg selection in | |
1993 | * the very near future. Called during first initialization, and during | |
1994 | * any down to up transitions of the bond. | |
1995 | */ | |
1996 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1997 | { | |
1998 | atomic_set(&BOND_AD_INFO(bond).agg_select_timer, timeout); | |
1999 | } | |
2000 | ||
2001 | /** | |
2002 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
2003 | * @bond: bonding struct to work on | |
2004 | * @tick_resolution: tick duration (millisecond resolution) | |
2005 | * | |
2006 | * Can be called only after the mac address of the bond is set. | |
2007 | */ | |
2008 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) | |
2009 | { | |
2010 | /* check that the bond is not initialized yet */ | |
2011 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
2012 | bond->dev->dev_addr)) { | |
2013 | ||
2014 | BOND_AD_INFO(bond).aggregator_identifier = 0; | |
2015 | ||
2016 | BOND_AD_INFO(bond).system.sys_priority = | |
2017 | bond->params.ad_actor_sys_prio; | |
2018 | if (is_zero_ether_addr(bond->params.ad_actor_system)) | |
2019 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
2020 | *((struct mac_addr *)bond->dev->dev_addr); | |
2021 | else | |
2022 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
2023 | *((struct mac_addr *)bond->params.ad_actor_system); | |
2024 | ||
2025 | /* initialize how many times this module is called in one | |
2026 | * second (should be about every 100ms) | |
2027 | */ | |
2028 | ad_ticks_per_sec = tick_resolution; | |
2029 | ||
2030 | bond_3ad_initiate_agg_selection(bond, | |
2031 | AD_AGGREGATOR_SELECTION_TIMER * | |
2032 | ad_ticks_per_sec); | |
2033 | } | |
2034 | } | |
2035 | ||
2036 | /** | |
2037 | * bond_3ad_bind_slave - initialize a slave's port | |
2038 | * @slave: slave struct to work on | |
2039 | * | |
2040 | * Returns: 0 on success | |
2041 | * < 0 on error | |
2042 | */ | |
2043 | void bond_3ad_bind_slave(struct slave *slave) | |
2044 | { | |
2045 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
2046 | struct port *port; | |
2047 | struct aggregator *aggregator; | |
2048 | ||
2049 | /* check that the slave has not been initialized yet. */ | |
2050 | if (SLAVE_AD_INFO(slave)->port.slave != slave) { | |
2051 | ||
2052 | /* port initialization */ | |
2053 | port = &(SLAVE_AD_INFO(slave)->port); | |
2054 | ||
2055 | ad_initialize_port(port, bond->params.lacp_fast); | |
2056 | ||
2057 | port->slave = slave; | |
2058 | port->actor_port_number = SLAVE_AD_INFO(slave)->id; | |
2059 | /* key is determined according to the link speed, duplex and | |
2060 | * user key | |
2061 | */ | |
2062 | port->actor_admin_port_key = bond->params.ad_user_port_key << 6; | |
2063 | ad_update_actor_keys(port, false); | |
2064 | /* actor system is the bond's system */ | |
2065 | __ad_actor_update_port(port); | |
2066 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND | |
2067 | * lacpdu's are sent in one second) | |
2068 | */ | |
2069 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
2070 | ||
2071 | __disable_port(port); | |
2072 | ||
2073 | /* aggregator initialization */ | |
2074 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); | |
2075 | ||
2076 | ad_initialize_agg(aggregator); | |
2077 | ||
2078 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
2079 | aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; | |
2080 | aggregator->slave = slave; | |
2081 | aggregator->is_active = 0; | |
2082 | aggregator->num_of_ports = 0; | |
2083 | } | |
2084 | } | |
2085 | ||
2086 | /** | |
2087 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
2088 | * @slave: slave struct to work on | |
2089 | * | |
2090 | * Search for the aggregator that is related to this port, remove the | |
2091 | * aggregator and assign another aggregator for other port related to it | |
2092 | * (if any), and remove the port. | |
2093 | */ | |
2094 | void bond_3ad_unbind_slave(struct slave *slave) | |
2095 | { | |
2096 | struct port *port, *prev_port, *temp_port; | |
2097 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
2098 | int select_new_active_agg = 0; | |
2099 | struct bonding *bond = slave->bond; | |
2100 | struct slave *slave_iter; | |
2101 | struct list_head *iter; | |
2102 | bool dummy_slave_update; /* Ignore this value as caller updates array */ | |
2103 | ||
2104 | /* Sync against bond_3ad_state_machine_handler() */ | |
2105 | spin_lock_bh(&bond->mode_lock); | |
2106 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); | |
2107 | port = &(SLAVE_AD_INFO(slave)->port); | |
2108 | ||
2109 | /* if slave is null, the whole port is not initialized */ | |
2110 | if (!port->slave) { | |
2111 | slave_warn(bond->dev, slave->dev, "Trying to unbind an uninitialized port\n"); | |
2112 | goto out; | |
2113 | } | |
2114 | ||
2115 | slave_dbg(bond->dev, slave->dev, "Unbinding Link Aggregation Group %d\n", | |
2116 | aggregator->aggregator_identifier); | |
2117 | ||
2118 | /* Tell the partner that this port is not suitable for aggregation */ | |
2119 | port->actor_oper_port_state &= ~LACP_STATE_SYNCHRONIZATION; | |
2120 | port->actor_oper_port_state &= ~LACP_STATE_COLLECTING; | |
2121 | port->actor_oper_port_state &= ~LACP_STATE_DISTRIBUTING; | |
2122 | port->actor_oper_port_state &= ~LACP_STATE_AGGREGATION; | |
2123 | __update_lacpdu_from_port(port); | |
2124 | ad_lacpdu_send(port); | |
2125 | ||
2126 | /* check if this aggregator is occupied */ | |
2127 | if (aggregator->lag_ports) { | |
2128 | /* check if there are other ports related to this aggregator | |
2129 | * except the port related to this slave(thats ensure us that | |
2130 | * there is a reason to search for new aggregator, and that we | |
2131 | * will find one | |
2132 | */ | |
2133 | if ((aggregator->lag_ports != port) || | |
2134 | (aggregator->lag_ports->next_port_in_aggregator)) { | |
2135 | /* find new aggregator for the related port(s) */ | |
2136 | bond_for_each_slave(bond, slave_iter, iter) { | |
2137 | new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); | |
2138 | /* if the new aggregator is empty, or it is | |
2139 | * connected to our port only | |
2140 | */ | |
2141 | if (!new_aggregator->lag_ports || | |
2142 | ((new_aggregator->lag_ports == port) && | |
2143 | !new_aggregator->lag_ports->next_port_in_aggregator)) | |
2144 | break; | |
2145 | } | |
2146 | if (!slave_iter) | |
2147 | new_aggregator = NULL; | |
2148 | ||
2149 | /* if new aggregator found, copy the aggregator's | |
2150 | * parameters and connect the related lag_ports to the | |
2151 | * new aggregator | |
2152 | */ | |
2153 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
2154 | slave_dbg(bond->dev, slave->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", | |
2155 | aggregator->aggregator_identifier, | |
2156 | new_aggregator->aggregator_identifier); | |
2157 | ||
2158 | if ((new_aggregator->lag_ports == port) && | |
2159 | new_aggregator->is_active) { | |
2160 | slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); | |
2161 | select_new_active_agg = 1; | |
2162 | } | |
2163 | ||
2164 | new_aggregator->is_individual = aggregator->is_individual; | |
2165 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
2166 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
2167 | new_aggregator->partner_system = aggregator->partner_system; | |
2168 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
2169 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
2170 | new_aggregator->receive_state = aggregator->receive_state; | |
2171 | new_aggregator->transmit_state = aggregator->transmit_state; | |
2172 | new_aggregator->lag_ports = aggregator->lag_ports; | |
2173 | new_aggregator->is_active = aggregator->is_active; | |
2174 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
2175 | ||
2176 | /* update the information that is written on | |
2177 | * the ports about the aggregator | |
2178 | */ | |
2179 | for (temp_port = aggregator->lag_ports; temp_port; | |
2180 | temp_port = temp_port->next_port_in_aggregator) { | |
2181 | temp_port->aggregator = new_aggregator; | |
2182 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; | |
2183 | } | |
2184 | ||
2185 | ad_clear_agg(aggregator); | |
2186 | ||
2187 | if (select_new_active_agg) | |
2188 | ad_agg_selection_logic(__get_first_agg(port), | |
2189 | &dummy_slave_update); | |
2190 | } else { | |
2191 | slave_warn(bond->dev, slave->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); | |
2192 | } | |
2193 | } else { | |
2194 | /* in case that the only port related to this | |
2195 | * aggregator is the one we want to remove | |
2196 | */ | |
2197 | select_new_active_agg = aggregator->is_active; | |
2198 | ad_clear_agg(aggregator); | |
2199 | if (select_new_active_agg) { | |
2200 | slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); | |
2201 | /* select new active aggregator */ | |
2202 | temp_aggregator = __get_first_agg(port); | |
2203 | if (temp_aggregator) | |
2204 | ad_agg_selection_logic(temp_aggregator, | |
2205 | &dummy_slave_update); | |
2206 | } | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | slave_dbg(bond->dev, slave->dev, "Unbinding port %d\n", port->actor_port_number); | |
2211 | ||
2212 | /* find the aggregator that this port is connected to */ | |
2213 | bond_for_each_slave(bond, slave_iter, iter) { | |
2214 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); | |
2215 | prev_port = NULL; | |
2216 | /* search the port in the aggregator's related ports */ | |
2217 | for (temp_port = temp_aggregator->lag_ports; temp_port; | |
2218 | prev_port = temp_port, | |
2219 | temp_port = temp_port->next_port_in_aggregator) { | |
2220 | if (temp_port == port) { | |
2221 | /* the aggregator found - detach the port from | |
2222 | * this aggregator | |
2223 | */ | |
2224 | if (prev_port) | |
2225 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; | |
2226 | else | |
2227 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; | |
2228 | temp_aggregator->num_of_ports--; | |
2229 | if (__agg_active_ports(temp_aggregator) == 0) { | |
2230 | select_new_active_agg = temp_aggregator->is_active; | |
2231 | ad_clear_agg(temp_aggregator); | |
2232 | if (select_new_active_agg) { | |
2233 | slave_info(bond->dev, slave->dev, "Removing an active aggregator\n"); | |
2234 | /* select new active aggregator */ | |
2235 | ad_agg_selection_logic(__get_first_agg(port), | |
2236 | &dummy_slave_update); | |
2237 | } | |
2238 | } | |
2239 | break; | |
2240 | } | |
2241 | } | |
2242 | } | |
2243 | port->slave = NULL; | |
2244 | ||
2245 | out: | |
2246 | spin_unlock_bh(&bond->mode_lock); | |
2247 | } | |
2248 | ||
2249 | /** | |
2250 | * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports | |
2251 | * @bond: bonding struct to work on | |
2252 | * | |
2253 | * If an ad_actor setting gets changed we need to update the individual port | |
2254 | * settings so the bond device will use the new values when it gets upped. | |
2255 | */ | |
2256 | void bond_3ad_update_ad_actor_settings(struct bonding *bond) | |
2257 | { | |
2258 | struct list_head *iter; | |
2259 | struct slave *slave; | |
2260 | ||
2261 | ASSERT_RTNL(); | |
2262 | ||
2263 | BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; | |
2264 | if (is_zero_ether_addr(bond->params.ad_actor_system)) | |
2265 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
2266 | *((struct mac_addr *)bond->dev->dev_addr); | |
2267 | else | |
2268 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
2269 | *((struct mac_addr *)bond->params.ad_actor_system); | |
2270 | ||
2271 | spin_lock_bh(&bond->mode_lock); | |
2272 | bond_for_each_slave(bond, slave, iter) { | |
2273 | struct port *port = &(SLAVE_AD_INFO(slave))->port; | |
2274 | ||
2275 | __ad_actor_update_port(port); | |
2276 | port->ntt = true; | |
2277 | } | |
2278 | spin_unlock_bh(&bond->mode_lock); | |
2279 | } | |
2280 | ||
2281 | /** | |
2282 | * bond_agg_timer_advance - advance agg_select_timer | |
2283 | * @bond: bonding structure | |
2284 | * | |
2285 | * Return true when agg_select_timer reaches 0. | |
2286 | */ | |
2287 | static bool bond_agg_timer_advance(struct bonding *bond) | |
2288 | { | |
2289 | int val, nval; | |
2290 | ||
2291 | while (1) { | |
2292 | val = atomic_read(&BOND_AD_INFO(bond).agg_select_timer); | |
2293 | if (!val) | |
2294 | return false; | |
2295 | nval = val - 1; | |
2296 | if (atomic_cmpxchg(&BOND_AD_INFO(bond).agg_select_timer, | |
2297 | val, nval) == val) | |
2298 | break; | |
2299 | } | |
2300 | return nval == 0; | |
2301 | } | |
2302 | ||
2303 | /** | |
2304 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2305 | * @work: work context to fetch bonding struct to work on from | |
2306 | * | |
2307 | * The state machine handling concept in this module is to check every tick | |
2308 | * which state machine should operate any function. The execution order is | |
2309 | * round robin, so when we have an interaction between state machines, the | |
2310 | * reply of one to each other might be delayed until next tick. | |
2311 | * | |
2312 | * This function also complete the initialization when the agg_select_timer | |
2313 | * times out, and it selects an aggregator for the ports that are yet not | |
2314 | * related to any aggregator, and selects the active aggregator for a bond. | |
2315 | */ | |
2316 | void bond_3ad_state_machine_handler(struct work_struct *work) | |
2317 | { | |
2318 | struct bonding *bond = container_of(work, struct bonding, | |
2319 | ad_work.work); | |
2320 | struct aggregator *aggregator; | |
2321 | struct list_head *iter; | |
2322 | struct slave *slave; | |
2323 | struct port *port; | |
2324 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; | |
2325 | bool update_slave_arr = false; | |
2326 | ||
2327 | /* Lock to protect data accessed by all (e.g., port->sm_vars) and | |
2328 | * against running with bond_3ad_unbind_slave. ad_rx_machine may run | |
2329 | * concurrently due to incoming LACPDU as well. | |
2330 | */ | |
2331 | spin_lock_bh(&bond->mode_lock); | |
2332 | rcu_read_lock(); | |
2333 | ||
2334 | /* check if there are any slaves */ | |
2335 | if (!bond_has_slaves(bond)) | |
2336 | goto re_arm; | |
2337 | ||
2338 | if (bond_agg_timer_advance(bond)) { | |
2339 | slave = bond_first_slave_rcu(bond); | |
2340 | port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; | |
2341 | ||
2342 | /* select the active aggregator for the bond */ | |
2343 | if (port) { | |
2344 | if (!port->slave) { | |
2345 | net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", | |
2346 | bond->dev->name); | |
2347 | goto re_arm; | |
2348 | } | |
2349 | ||
2350 | aggregator = __get_first_agg(port); | |
2351 | ad_agg_selection_logic(aggregator, &update_slave_arr); | |
2352 | } | |
2353 | bond_3ad_set_carrier(bond); | |
2354 | } | |
2355 | ||
2356 | /* for each port run the state machines */ | |
2357 | bond_for_each_slave_rcu(bond, slave, iter) { | |
2358 | port = &(SLAVE_AD_INFO(slave)->port); | |
2359 | if (!port->slave) { | |
2360 | net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", | |
2361 | bond->dev->name); | |
2362 | goto re_arm; | |
2363 | } | |
2364 | ||
2365 | ad_rx_machine(NULL, port); | |
2366 | ad_periodic_machine(port, &bond->params); | |
2367 | ad_port_selection_logic(port, &update_slave_arr); | |
2368 | ad_mux_machine(port, &update_slave_arr); | |
2369 | ad_tx_machine(port); | |
2370 | ad_churn_machine(port); | |
2371 | ||
2372 | /* turn off the BEGIN bit, since we already handled it */ | |
2373 | if (port->sm_vars & AD_PORT_BEGIN) | |
2374 | port->sm_vars &= ~AD_PORT_BEGIN; | |
2375 | } | |
2376 | ||
2377 | re_arm: | |
2378 | bond_for_each_slave_rcu(bond, slave, iter) { | |
2379 | if (slave->should_notify) { | |
2380 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2381 | break; | |
2382 | } | |
2383 | } | |
2384 | rcu_read_unlock(); | |
2385 | spin_unlock_bh(&bond->mode_lock); | |
2386 | ||
2387 | if (update_slave_arr) | |
2388 | bond_slave_arr_work_rearm(bond, 0); | |
2389 | ||
2390 | if (should_notify_rtnl && rtnl_trylock()) { | |
2391 | bond_slave_state_notify(bond); | |
2392 | rtnl_unlock(); | |
2393 | } | |
2394 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); | |
2395 | } | |
2396 | ||
2397 | /** | |
2398 | * bond_3ad_rx_indication - handle a received frame | |
2399 | * @lacpdu: received lacpdu | |
2400 | * @slave: slave struct to work on | |
2401 | * | |
2402 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2403 | * received frames (loopback). Since only the payload is given to this | |
2404 | * function, it check for loopback. | |
2405 | */ | |
2406 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave) | |
2407 | { | |
2408 | struct bonding *bond = slave->bond; | |
2409 | int ret = RX_HANDLER_ANOTHER; | |
2410 | struct bond_marker *marker; | |
2411 | struct port *port; | |
2412 | atomic64_t *stat; | |
2413 | ||
2414 | port = &(SLAVE_AD_INFO(slave)->port); | |
2415 | if (!port->slave) { | |
2416 | net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", | |
2417 | slave->dev->name, slave->bond->dev->name); | |
2418 | return ret; | |
2419 | } | |
2420 | ||
2421 | switch (lacpdu->subtype) { | |
2422 | case AD_TYPE_LACPDU: | |
2423 | ret = RX_HANDLER_CONSUMED; | |
2424 | slave_dbg(slave->bond->dev, slave->dev, | |
2425 | "Received LACPDU on port %d\n", | |
2426 | port->actor_port_number); | |
2427 | /* Protect against concurrent state machines */ | |
2428 | spin_lock(&slave->bond->mode_lock); | |
2429 | ad_rx_machine(lacpdu, port); | |
2430 | spin_unlock(&slave->bond->mode_lock); | |
2431 | break; | |
2432 | case AD_TYPE_MARKER: | |
2433 | ret = RX_HANDLER_CONSUMED; | |
2434 | /* No need to convert fields to Little Endian since we | |
2435 | * don't use the marker's fields. | |
2436 | */ | |
2437 | marker = (struct bond_marker *)lacpdu; | |
2438 | switch (marker->tlv_type) { | |
2439 | case AD_MARKER_INFORMATION_SUBTYPE: | |
2440 | slave_dbg(slave->bond->dev, slave->dev, "Received Marker Information on port %d\n", | |
2441 | port->actor_port_number); | |
2442 | ad_marker_info_received(marker, port); | |
2443 | break; | |
2444 | case AD_MARKER_RESPONSE_SUBTYPE: | |
2445 | slave_dbg(slave->bond->dev, slave->dev, "Received Marker Response on port %d\n", | |
2446 | port->actor_port_number); | |
2447 | ad_marker_response_received(marker, port); | |
2448 | break; | |
2449 | default: | |
2450 | slave_dbg(slave->bond->dev, slave->dev, "Received an unknown Marker subtype on port %d\n", | |
2451 | port->actor_port_number); | |
2452 | stat = &SLAVE_AD_INFO(slave)->stats.marker_unknown_rx; | |
2453 | atomic64_inc(stat); | |
2454 | stat = &BOND_AD_INFO(bond).stats.marker_unknown_rx; | |
2455 | atomic64_inc(stat); | |
2456 | } | |
2457 | break; | |
2458 | default: | |
2459 | atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_unknown_rx); | |
2460 | atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_unknown_rx); | |
2461 | } | |
2462 | ||
2463 | return ret; | |
2464 | } | |
2465 | ||
2466 | /** | |
2467 | * ad_update_actor_keys - Update the oper / admin keys for a port based on | |
2468 | * its current speed and duplex settings. | |
2469 | * | |
2470 | * @port: the port we'are looking at | |
2471 | * @reset: Boolean to just reset the speed and the duplex part of the key | |
2472 | * | |
2473 | * The logic to change the oper / admin keys is: | |
2474 | * (a) A full duplex port can participate in LACP with partner. | |
2475 | * (b) When the speed is changed, LACP need to be reinitiated. | |
2476 | */ | |
2477 | static void ad_update_actor_keys(struct port *port, bool reset) | |
2478 | { | |
2479 | u8 duplex = 0; | |
2480 | u16 ospeed = 0, speed = 0; | |
2481 | u16 old_oper_key = port->actor_oper_port_key; | |
2482 | ||
2483 | port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); | |
2484 | if (!reset) { | |
2485 | speed = __get_link_speed(port); | |
2486 | ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; | |
2487 | duplex = __get_duplex(port); | |
2488 | port->actor_admin_port_key |= (speed << 1) | duplex; | |
2489 | } | |
2490 | port->actor_oper_port_key = port->actor_admin_port_key; | |
2491 | ||
2492 | if (old_oper_key != port->actor_oper_port_key) { | |
2493 | /* Only 'duplex' port participates in LACP */ | |
2494 | if (duplex) | |
2495 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
2496 | else | |
2497 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
2498 | ||
2499 | if (!reset) { | |
2500 | if (!speed) { | |
2501 | slave_err(port->slave->bond->dev, | |
2502 | port->slave->dev, | |
2503 | "speed changed to 0 on port %d\n", | |
2504 | port->actor_port_number); | |
2505 | } else if (duplex && ospeed != speed) { | |
2506 | /* Speed change restarts LACP state-machine */ | |
2507 | port->sm_vars |= AD_PORT_BEGIN; | |
2508 | } | |
2509 | } | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | /** | |
2514 | * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex | |
2515 | * change indication | |
2516 | * | |
2517 | * @slave: slave struct to work on | |
2518 | * | |
2519 | * Handle reselection of aggregator (if needed) for this port. | |
2520 | */ | |
2521 | void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) | |
2522 | { | |
2523 | struct port *port; | |
2524 | ||
2525 | port = &(SLAVE_AD_INFO(slave)->port); | |
2526 | ||
2527 | /* if slave is null, the whole port is not initialized */ | |
2528 | if (!port->slave) { | |
2529 | slave_warn(slave->bond->dev, slave->dev, | |
2530 | "speed/duplex changed for uninitialized port\n"); | |
2531 | return; | |
2532 | } | |
2533 | ||
2534 | spin_lock_bh(&slave->bond->mode_lock); | |
2535 | ad_update_actor_keys(port, false); | |
2536 | spin_unlock_bh(&slave->bond->mode_lock); | |
2537 | slave_dbg(slave->bond->dev, slave->dev, "Port %d changed speed/duplex\n", | |
2538 | port->actor_port_number); | |
2539 | } | |
2540 | ||
2541 | /** | |
2542 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2543 | * @slave: slave struct to work on | |
2544 | * @link: whether the link is now up or down | |
2545 | * | |
2546 | * Handle reselection of aggregator (if needed) for this port. | |
2547 | */ | |
2548 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2549 | { | |
2550 | struct aggregator *agg; | |
2551 | struct port *port; | |
2552 | bool dummy; | |
2553 | ||
2554 | port = &(SLAVE_AD_INFO(slave)->port); | |
2555 | ||
2556 | /* if slave is null, the whole port is not initialized */ | |
2557 | if (!port->slave) { | |
2558 | slave_warn(slave->bond->dev, slave->dev, "link status changed for uninitialized port\n"); | |
2559 | return; | |
2560 | } | |
2561 | ||
2562 | spin_lock_bh(&slave->bond->mode_lock); | |
2563 | /* on link down we are zeroing duplex and speed since | |
2564 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2565 | * instead of N/A(duplex) / 0(speed). | |
2566 | * | |
2567 | * on link up we are forcing recheck on the duplex and speed since | |
2568 | * some of he adaptors(ce1000.lan) report. | |
2569 | */ | |
2570 | if (link == BOND_LINK_UP) { | |
2571 | port->is_enabled = true; | |
2572 | ad_update_actor_keys(port, false); | |
2573 | } else { | |
2574 | /* link has failed */ | |
2575 | port->is_enabled = false; | |
2576 | ad_update_actor_keys(port, true); | |
2577 | } | |
2578 | agg = __get_first_agg(port); | |
2579 | ad_agg_selection_logic(agg, &dummy); | |
2580 | ||
2581 | spin_unlock_bh(&slave->bond->mode_lock); | |
2582 | ||
2583 | slave_dbg(slave->bond->dev, slave->dev, "Port %d changed link status to %s\n", | |
2584 | port->actor_port_number, | |
2585 | link == BOND_LINK_UP ? "UP" : "DOWN"); | |
2586 | ||
2587 | /* RTNL is held and mode_lock is released so it's safe | |
2588 | * to update slave_array here. | |
2589 | */ | |
2590 | bond_update_slave_arr(slave->bond, NULL); | |
2591 | } | |
2592 | ||
2593 | /** | |
2594 | * bond_3ad_set_carrier - set link state for bonding master | |
2595 | * @bond: bonding structure | |
2596 | * | |
2597 | * if we have an active aggregator, we're up, if not, we're down. | |
2598 | * Presumes that we cannot have an active aggregator if there are | |
2599 | * no slaves with link up. | |
2600 | * | |
2601 | * This behavior complies with IEEE 802.3 section 43.3.9. | |
2602 | * | |
2603 | * Called by bond_set_carrier(). Return zero if carrier state does not | |
2604 | * change, nonzero if it does. | |
2605 | */ | |
2606 | int bond_3ad_set_carrier(struct bonding *bond) | |
2607 | { | |
2608 | struct aggregator *active; | |
2609 | struct slave *first_slave; | |
2610 | int ret = 1; | |
2611 | ||
2612 | rcu_read_lock(); | |
2613 | first_slave = bond_first_slave_rcu(bond); | |
2614 | if (!first_slave) { | |
2615 | ret = 0; | |
2616 | goto out; | |
2617 | } | |
2618 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); | |
2619 | if (active) { | |
2620 | /* are enough slaves available to consider link up? */ | |
2621 | if (__agg_active_ports(active) < bond->params.min_links) { | |
2622 | if (netif_carrier_ok(bond->dev)) { | |
2623 | netif_carrier_off(bond->dev); | |
2624 | goto out; | |
2625 | } | |
2626 | } else if (!netif_carrier_ok(bond->dev)) { | |
2627 | netif_carrier_on(bond->dev); | |
2628 | goto out; | |
2629 | } | |
2630 | } else if (netif_carrier_ok(bond->dev)) { | |
2631 | netif_carrier_off(bond->dev); | |
2632 | } | |
2633 | out: | |
2634 | rcu_read_unlock(); | |
2635 | return ret; | |
2636 | } | |
2637 | ||
2638 | /** | |
2639 | * __bond_3ad_get_active_agg_info - get information of the active aggregator | |
2640 | * @bond: bonding struct to work on | |
2641 | * @ad_info: ad_info struct to fill with the bond's info | |
2642 | * | |
2643 | * Returns: 0 on success | |
2644 | * < 0 on error | |
2645 | */ | |
2646 | int __bond_3ad_get_active_agg_info(struct bonding *bond, | |
2647 | struct ad_info *ad_info) | |
2648 | { | |
2649 | struct aggregator *aggregator = NULL; | |
2650 | struct list_head *iter; | |
2651 | struct slave *slave; | |
2652 | struct port *port; | |
2653 | ||
2654 | bond_for_each_slave_rcu(bond, slave, iter) { | |
2655 | port = &(SLAVE_AD_INFO(slave)->port); | |
2656 | if (port->aggregator && port->aggregator->is_active) { | |
2657 | aggregator = port->aggregator; | |
2658 | break; | |
2659 | } | |
2660 | } | |
2661 | ||
2662 | if (!aggregator) | |
2663 | return -1; | |
2664 | ||
2665 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2666 | ad_info->ports = __agg_active_ports(aggregator); | |
2667 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2668 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2669 | ether_addr_copy(ad_info->partner_system, | |
2670 | aggregator->partner_system.mac_addr_value); | |
2671 | return 0; | |
2672 | } | |
2673 | ||
2674 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2675 | { | |
2676 | int ret; | |
2677 | ||
2678 | rcu_read_lock(); | |
2679 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); | |
2680 | rcu_read_unlock(); | |
2681 | ||
2682 | return ret; | |
2683 | } | |
2684 | ||
2685 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, | |
2686 | struct slave *slave) | |
2687 | { | |
2688 | struct lacpdu *lacpdu, _lacpdu; | |
2689 | ||
2690 | if (skb->protocol != PKT_TYPE_LACPDU) | |
2691 | return RX_HANDLER_ANOTHER; | |
2692 | ||
2693 | if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) | |
2694 | return RX_HANDLER_ANOTHER; | |
2695 | ||
2696 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); | |
2697 | if (!lacpdu) { | |
2698 | atomic64_inc(&SLAVE_AD_INFO(slave)->stats.lacpdu_illegal_rx); | |
2699 | atomic64_inc(&BOND_AD_INFO(bond).stats.lacpdu_illegal_rx); | |
2700 | return RX_HANDLER_ANOTHER; | |
2701 | } | |
2702 | ||
2703 | return bond_3ad_rx_indication(lacpdu, slave); | |
2704 | } | |
2705 | ||
2706 | /** | |
2707 | * bond_3ad_update_lacp_rate - change the lacp rate | |
2708 | * @bond: bonding struct | |
2709 | * | |
2710 | * When modify lacp_rate parameter via sysfs, | |
2711 | * update actor_oper_port_state of each port. | |
2712 | * | |
2713 | * Hold bond->mode_lock, | |
2714 | * so we can modify port->actor_oper_port_state, | |
2715 | * no matter bond is up or down. | |
2716 | */ | |
2717 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2718 | { | |
2719 | struct port *port = NULL; | |
2720 | struct list_head *iter; | |
2721 | struct slave *slave; | |
2722 | int lacp_fast; | |
2723 | ||
2724 | lacp_fast = bond->params.lacp_fast; | |
2725 | spin_lock_bh(&bond->mode_lock); | |
2726 | bond_for_each_slave(bond, slave, iter) { | |
2727 | port = &(SLAVE_AD_INFO(slave)->port); | |
2728 | if (lacp_fast) | |
2729 | port->actor_oper_port_state |= LACP_STATE_LACP_TIMEOUT; | |
2730 | else | |
2731 | port->actor_oper_port_state &= ~LACP_STATE_LACP_TIMEOUT; | |
2732 | } | |
2733 | spin_unlock_bh(&bond->mode_lock); | |
2734 | } | |
2735 | ||
2736 | size_t bond_3ad_stats_size(void) | |
2737 | { | |
2738 | return nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_RX */ | |
2739 | nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_TX */ | |
2740 | nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_UNKNOWN_RX */ | |
2741 | nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_LACPDU_ILLEGAL_RX */ | |
2742 | nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RX */ | |
2743 | nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_TX */ | |
2744 | nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_RX */ | |
2745 | nla_total_size_64bit(sizeof(u64)) + /* BOND_3AD_STAT_MARKER_RESP_TX */ | |
2746 | nla_total_size_64bit(sizeof(u64)); /* BOND_3AD_STAT_MARKER_UNKNOWN_RX */ | |
2747 | } | |
2748 | ||
2749 | int bond_3ad_stats_fill(struct sk_buff *skb, struct bond_3ad_stats *stats) | |
2750 | { | |
2751 | u64 val; | |
2752 | ||
2753 | val = atomic64_read(&stats->lacpdu_rx); | |
2754 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_RX, val, | |
2755 | BOND_3AD_STAT_PAD)) | |
2756 | return -EMSGSIZE; | |
2757 | val = atomic64_read(&stats->lacpdu_tx); | |
2758 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_TX, val, | |
2759 | BOND_3AD_STAT_PAD)) | |
2760 | return -EMSGSIZE; | |
2761 | val = atomic64_read(&stats->lacpdu_unknown_rx); | |
2762 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_UNKNOWN_RX, val, | |
2763 | BOND_3AD_STAT_PAD)) | |
2764 | return -EMSGSIZE; | |
2765 | val = atomic64_read(&stats->lacpdu_illegal_rx); | |
2766 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_LACPDU_ILLEGAL_RX, val, | |
2767 | BOND_3AD_STAT_PAD)) | |
2768 | return -EMSGSIZE; | |
2769 | ||
2770 | val = atomic64_read(&stats->marker_rx); | |
2771 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RX, val, | |
2772 | BOND_3AD_STAT_PAD)) | |
2773 | return -EMSGSIZE; | |
2774 | val = atomic64_read(&stats->marker_tx); | |
2775 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_TX, val, | |
2776 | BOND_3AD_STAT_PAD)) | |
2777 | return -EMSGSIZE; | |
2778 | val = atomic64_read(&stats->marker_resp_rx); | |
2779 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_RX, val, | |
2780 | BOND_3AD_STAT_PAD)) | |
2781 | return -EMSGSIZE; | |
2782 | val = atomic64_read(&stats->marker_resp_tx); | |
2783 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_RESP_TX, val, | |
2784 | BOND_3AD_STAT_PAD)) | |
2785 | return -EMSGSIZE; | |
2786 | val = atomic64_read(&stats->marker_unknown_rx); | |
2787 | if (nla_put_u64_64bit(skb, BOND_3AD_STAT_MARKER_UNKNOWN_RX, val, | |
2788 | BOND_3AD_STAT_PAD)) | |
2789 | return -EMSGSIZE; | |
2790 | ||
2791 | return 0; | |
2792 | } |