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1da177e4 LT |
1 | /* |
2 | * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; either version 2 of the License, or (at your option) | |
7 | * any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 | |
16 | * Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
1da177e4 LT |
21 | */ |
22 | ||
a4aee5c8 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
1da177e4 LT |
25 | #include <linux/skbuff.h> |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/ethtool.h> | |
fd989c83 | 30 | #include <linux/etherdevice.h> |
1da177e4 LT |
31 | #include <linux/if_bonding.h> |
32 | #include <linux/pkt_sched.h> | |
e730c155 | 33 | #include <net/net_namespace.h> |
1da177e4 LT |
34 | #include "bonding.h" |
35 | #include "bond_3ad.h" | |
36 | ||
37 | // General definitions | |
38 | #define AD_SHORT_TIMEOUT 1 | |
39 | #define AD_LONG_TIMEOUT 0 | |
40 | #define AD_STANDBY 0x2 | |
41 | #define AD_MAX_TX_IN_SECOND 3 | |
42 | #define AD_COLLECTOR_MAX_DELAY 0 | |
43 | ||
44 | // Timer definitions(43.4.4 in the 802.3ad standard) | |
45 | #define AD_FAST_PERIODIC_TIME 1 | |
46 | #define AD_SLOW_PERIODIC_TIME 30 | |
47 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
48 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
49 | #define AD_CHURN_DETECTION_TIME 60 | |
50 | #define AD_AGGREGATE_WAIT_TIME 2 | |
51 | ||
52 | // Port state definitions(43.4.2.2 in the 802.3ad standard) | |
53 | #define AD_STATE_LACP_ACTIVITY 0x1 | |
54 | #define AD_STATE_LACP_TIMEOUT 0x2 | |
55 | #define AD_STATE_AGGREGATION 0x4 | |
56 | #define AD_STATE_SYNCHRONIZATION 0x8 | |
57 | #define AD_STATE_COLLECTING 0x10 | |
58 | #define AD_STATE_DISTRIBUTING 0x20 | |
59 | #define AD_STATE_DEFAULTED 0x40 | |
60 | #define AD_STATE_EXPIRED 0x80 | |
61 | ||
62 | // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) | |
63 | #define AD_PORT_BEGIN 0x1 | |
64 | #define AD_PORT_LACP_ENABLED 0x2 | |
65 | #define AD_PORT_ACTOR_CHURN 0x4 | |
66 | #define AD_PORT_PARTNER_CHURN 0x8 | |
67 | #define AD_PORT_READY 0x10 | |
68 | #define AD_PORT_READY_N 0x20 | |
69 | #define AD_PORT_MATCHED 0x40 | |
70 | #define AD_PORT_STANDBY 0x80 | |
71 | #define AD_PORT_SELECTED 0x100 | |
72 | #define AD_PORT_MOVED 0x200 | |
73 | ||
74 | // Port Key definitions | |
75 | // key is determined according to the link speed, duplex and | |
76 | // user key(which is yet not supported) | |
77 | // ------------------------------------------------------------ | |
78 | // Port key : | User key | Speed |Duplex| | |
79 | // ------------------------------------------------------------ | |
80 | // 16 6 1 0 | |
81 | #define AD_DUPLEX_KEY_BITS 0x1 | |
82 | #define AD_SPEED_KEY_BITS 0x3E | |
83 | #define AD_USER_KEY_BITS 0xFFC0 | |
84 | ||
85 | //dalloun | |
86 | #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 | |
87 | #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 | |
88 | #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 | |
89 | #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 | |
94dbffd5 | 90 | #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 |
1da177e4 LT |
91 | //endalloun |
92 | ||
815117ad | 93 | /* compare MAC addresses */ |
94 | #define MAC_ADDRESS_EQUAL(A, B) \ | |
95 | ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) | |
1da177e4 | 96 | |
128ea6c3 | 97 | static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; |
1da177e4 LT |
98 | static u16 ad_ticks_per_sec; |
99 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
100 | ||
e4ac4320 HE |
101 | static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
102 | ||
1da177e4 LT |
103 | // ================= main 802.3ad protocol functions ================== |
104 | static int ad_lacpdu_send(struct port *port); | |
1c3f0b8e | 105 | static int ad_marker_send(struct port *port, struct bond_marker *marker); |
1da177e4 LT |
106 | static void ad_mux_machine(struct port *port); |
107 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); | |
108 | static void ad_tx_machine(struct port *port); | |
109 | static void ad_periodic_machine(struct port *port); | |
110 | static void ad_port_selection_logic(struct port *port); | |
111 | static void ad_agg_selection_logic(struct aggregator *aggregator); | |
112 | static void ad_clear_agg(struct aggregator *aggregator); | |
113 | static void ad_initialize_agg(struct aggregator *aggregator); | |
114 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
1da177e4 LT |
115 | static void ad_enable_collecting_distributing(struct port *port); |
116 | static void ad_disable_collecting_distributing(struct port *port); | |
1c3f0b8e MD |
117 | static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); |
118 | static void ad_marker_response_received(struct bond_marker *marker, struct port *port); | |
1da177e4 LT |
119 | |
120 | ||
121 | ///////////////////////////////////////////////////////////////////////////////// | |
122 | // ================= api to bonding and kernel code ================== | |
123 | ///////////////////////////////////////////////////////////////////////////////// | |
124 | ||
125 | /** | |
126 | * __get_bond_by_port - get the port's bonding struct | |
127 | * @port: the port we're looking at | |
128 | * | |
129 | * Return @port's bonding struct, or %NULL if it can't be found. | |
130 | */ | |
131 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
132 | { | |
7bfc4753 | 133 | if (port->slave == NULL) |
1da177e4 | 134 | return NULL; |
1da177e4 LT |
135 | |
136 | return bond_get_bond_by_slave(port->slave); | |
137 | } | |
138 | ||
1da177e4 LT |
139 | /** |
140 | * __get_first_agg - get the first aggregator in the bond | |
141 | * @bond: the bond we're looking at | |
142 | * | |
143 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
144 | * found. | |
145 | */ | |
146 | static inline struct aggregator *__get_first_agg(struct port *port) | |
147 | { | |
148 | struct bonding *bond = __get_bond_by_port(port); | |
dec1e90e | 149 | struct slave *first_slave; |
1da177e4 | 150 | |
be79bd04 | 151 | /* If there's no bond for this port, or bond has no slaves */ |
dec1e90e | 152 | if (bond == NULL) |
1da177e4 | 153 | return NULL; |
be79bd04 | 154 | rcu_read_lock(); |
155 | first_slave = bond_first_slave_rcu(bond); | |
156 | rcu_read_unlock(); | |
dec1e90e | 157 | return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL; |
1da177e4 LT |
158 | } |
159 | ||
fd989c83 JV |
160 | /* |
161 | * __agg_has_partner | |
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 | ||
1da177e4 LT |
171 | /** |
172 | * __disable_port - disable the port's slave | |
173 | * @port: the port we're looking at | |
174 | * | |
175 | */ | |
176 | static inline void __disable_port(struct port *port) | |
177 | { | |
178 | bond_set_slave_inactive_flags(port->slave); | |
179 | } | |
180 | ||
181 | /** | |
182 | * __enable_port - enable the port's slave, if it's up | |
183 | * @port: the port we're looking at | |
184 | * | |
185 | */ | |
186 | static inline void __enable_port(struct port *port) | |
187 | { | |
188 | struct slave *slave = port->slave; | |
189 | ||
7bfc4753 | 190 | if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) |
1da177e4 | 191 | bond_set_slave_active_flags(slave); |
1da177e4 LT |
192 | } |
193 | ||
194 | /** | |
195 | * __port_is_enabled - check if the port's slave is in active state | |
196 | * @port: the port we're looking at | |
197 | * | |
198 | */ | |
199 | static inline int __port_is_enabled(struct port *port) | |
200 | { | |
e30bc066 | 201 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
202 | } |
203 | ||
204 | /** | |
205 | * __get_agg_selection_mode - get the aggregator selection mode | |
206 | * @port: the port we're looking at | |
207 | * | |
fd989c83 | 208 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
209 | */ |
210 | static inline u32 __get_agg_selection_mode(struct port *port) | |
211 | { | |
212 | struct bonding *bond = __get_bond_by_port(port); | |
213 | ||
7bfc4753 | 214 | if (bond == NULL) |
fd989c83 | 215 | return BOND_AD_STABLE; |
1da177e4 | 216 | |
1a14fbcb | 217 | return bond->params.ad_select; |
1da177e4 LT |
218 | } |
219 | ||
220 | /** | |
221 | * __check_agg_selection_timer - check if the selection timer has expired | |
222 | * @port: the port we're looking at | |
223 | * | |
224 | */ | |
225 | static inline int __check_agg_selection_timer(struct port *port) | |
226 | { | |
227 | struct bonding *bond = __get_bond_by_port(port); | |
228 | ||
7bfc4753 | 229 | if (bond == NULL) |
1da177e4 | 230 | return 0; |
1da177e4 LT |
231 | |
232 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
233 | } | |
234 | ||
235 | /** | |
9ac3524a | 236 | * __get_state_machine_lock - lock the port's state machines |
1da177e4 LT |
237 | * @port: the port we're looking at |
238 | * | |
239 | */ | |
9ac3524a | 240 | static inline void __get_state_machine_lock(struct port *port) |
1da177e4 | 241 | { |
9ac3524a | 242 | spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
243 | } |
244 | ||
245 | /** | |
9ac3524a | 246 | * __release_state_machine_lock - unlock the port's state machines |
1da177e4 LT |
247 | * @port: the port we're looking at |
248 | * | |
249 | */ | |
9ac3524a | 250 | static inline void __release_state_machine_lock(struct port *port) |
1da177e4 | 251 | { |
9ac3524a | 252 | spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
253 | } |
254 | ||
255 | /** | |
256 | * __get_link_speed - get a port's speed | |
257 | * @port: the port we're looking at | |
258 | * | |
259 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
260 | * 0, | |
261 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
262 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
263 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
264 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
265 | */ |
266 | static u16 __get_link_speed(struct port *port) | |
267 | { | |
268 | struct slave *slave = port->slave; | |
269 | u16 speed; | |
270 | ||
271 | /* this if covers only a special case: when the configuration starts with | |
272 | * link down, it sets the speed to 0. | |
273 | * This is done in spite of the fact that the e100 driver reports 0 to be | |
274 | * compatible with MVT in the future.*/ | |
7bfc4753 | 275 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 276 | speed = 0; |
7bfc4753 | 277 | else { |
1da177e4 LT |
278 | switch (slave->speed) { |
279 | case SPEED_10: | |
280 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
281 | break; | |
282 | ||
283 | case SPEED_100: | |
284 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
285 | break; | |
286 | ||
287 | case SPEED_1000: | |
288 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
289 | break; | |
290 | ||
94dbffd5 JV |
291 | case SPEED_10000: |
292 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
293 | break; | |
294 | ||
1da177e4 LT |
295 | default: |
296 | speed = 0; // unknown speed value from ethtool. shouldn't happen | |
297 | break; | |
298 | } | |
299 | } | |
300 | ||
a4aee5c8 JP |
301 | pr_debug("Port %d Received link speed %d update from adapter\n", |
302 | port->actor_port_number, speed); | |
1da177e4 LT |
303 | return speed; |
304 | } | |
305 | ||
306 | /** | |
307 | * __get_duplex - get a port's duplex | |
308 | * @port: the port we're looking at | |
309 | * | |
310 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
311 | * 0x01 if in full duplex | |
312 | * 0x00 otherwise | |
313 | */ | |
314 | static u8 __get_duplex(struct port *port) | |
315 | { | |
316 | struct slave *slave = port->slave; | |
317 | ||
318 | u8 retval; | |
319 | ||
320 | // handling a special case: when the configuration starts with | |
321 | // link down, it sets the duplex to 0. | |
7bfc4753 | 322 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 323 | retval = 0x0; |
7bfc4753 | 324 | else { |
1da177e4 LT |
325 | switch (slave->duplex) { |
326 | case DUPLEX_FULL: | |
128ea6c3 | 327 | retval = 0x1; |
a4aee5c8 JP |
328 | pr_debug("Port %d Received status full duplex update from adapter\n", |
329 | port->actor_port_number); | |
1da177e4 LT |
330 | break; |
331 | case DUPLEX_HALF: | |
332 | default: | |
128ea6c3 | 333 | retval = 0x0; |
a4aee5c8 JP |
334 | pr_debug("Port %d Received status NOT full duplex update from adapter\n", |
335 | port->actor_port_number); | |
1da177e4 LT |
336 | break; |
337 | } | |
338 | } | |
339 | return retval; | |
340 | } | |
341 | ||
342 | /** | |
9ac3524a | 343 | * __initialize_port_locks - initialize a port's STATE machine spinlock |
e0809dbc | 344 | * @port: the slave of the port we're looking at |
1da177e4 LT |
345 | * |
346 | */ | |
e0809dbc | 347 | static inline void __initialize_port_locks(struct slave *slave) |
1da177e4 LT |
348 | { |
349 | // make sure it isn't called twice | |
e0809dbc | 350 | spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock)); |
1da177e4 LT |
351 | } |
352 | ||
353 | //conversions | |
1da177e4 LT |
354 | |
355 | /** | |
356 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
357 | * @timer_type: which timer to operate | |
358 | * @par: timer parameter. see below | |
359 | * | |
360 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
361 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
362 | * %SLOW_PERIODIC_TIME. | |
363 | */ | |
364 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
365 | { | |
128ea6c3 | 366 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
367 | |
368 | switch (timer_type) { | |
369 | case AD_CURRENT_WHILE_TIMER: // for rx machine usage | |
7bfc4753 | 370 | if (par) |
1da177e4 | 371 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout |
7bfc4753 | 372 | else |
1da177e4 | 373 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout |
1da177e4 LT |
374 | break; |
375 | case AD_ACTOR_CHURN_TIMER: // for local churn machine | |
376 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
377 | break; | |
378 | case AD_PERIODIC_TIMER: // for periodic machine | |
379 | retval = (par*ad_ticks_per_sec); // long timeout | |
380 | break; | |
381 | case AD_PARTNER_CHURN_TIMER: // for remote churn machine | |
382 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
383 | break; | |
384 | case AD_WAIT_WHILE_TIMER: // for selection machine | |
385 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
386 | break; | |
387 | } | |
388 | return retval; | |
389 | } | |
390 | ||
391 | ||
392 | ///////////////////////////////////////////////////////////////////////////////// | |
393 | // ================= ad_rx_machine helper functions ================== | |
394 | ///////////////////////////////////////////////////////////////////////////////// | |
395 | ||
2d6682db JV |
396 | /** |
397 | * __choose_matched - update a port's matched variable from a received lacpdu | |
398 | * @lacpdu: the lacpdu we've received | |
399 | * @port: the port we're looking at | |
400 | * | |
401 | * Update the value of the matched variable, using parameter values from a | |
402 | * newly received lacpdu. Parameter values for the partner carried in the | |
403 | * received PDU are compared with the corresponding operational parameter | |
404 | * values for the actor. Matched is set to TRUE if all of these parameters | |
405 | * match and the PDU parameter partner_state.aggregation has the same value as | |
406 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
407 | * in the aggregation. Matched is also set to TRUE if the value of | |
408 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
409 | * an individual link and lacp will actively maintain the link. Otherwise, | |
410 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
411 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
412 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
413 | * partner_state.lacp_activity variables are TRUE. | |
414 | * | |
415 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
416 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
417 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
418 | */ | |
419 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
420 | { | |
815117ad | 421 | /* check if all parameters are alike |
422 | * or this is individual link(aggregation == FALSE) | |
423 | * then update the state machine Matched variable. | |
424 | */ | |
2d6682db JV |
425 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
426 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
815117ad | 427 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
2d6682db JV |
428 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
429 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
430 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
2d6682db JV |
431 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
432 | ) { | |
2d6682db JV |
433 | port->sm_vars |= AD_PORT_MATCHED; |
434 | } else { | |
435 | port->sm_vars &= ~AD_PORT_MATCHED; | |
436 | } | |
437 | } | |
438 | ||
1da177e4 LT |
439 | /** |
440 | * __record_pdu - record parameters from a received lacpdu | |
441 | * @lacpdu: the lacpdu we've received | |
442 | * @port: the port we're looking at | |
443 | * | |
444 | * Record the parameter values for the Actor carried in a received lacpdu as | |
445 | * the current partner operational parameter values and sets | |
446 | * actor_oper_port_state.defaulted to FALSE. | |
447 | */ | |
448 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
449 | { | |
1da177e4 | 450 | if (lacpdu && port) { |
b99d6ba9 HE |
451 | struct port_params *partner = &port->partner_oper; |
452 | ||
2d6682db | 453 | __choose_matched(lacpdu, port); |
1da177e4 | 454 | // record the new parameter values for the partner operational |
b99d6ba9 HE |
455 | partner->port_number = ntohs(lacpdu->actor_port); |
456 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
457 | partner->system = lacpdu->actor_system; | |
458 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
459 | partner->key = ntohs(lacpdu->actor_key); | |
460 | partner->port_state = lacpdu->actor_state; | |
1da177e4 LT |
461 | |
462 | // set actor_oper_port_state.defaulted to FALSE | |
463 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; | |
464 | ||
465 | // set the partner sync. to on if the partner is sync. and the port is matched | |
7bfc4753 BD |
466 | if ((port->sm_vars & AD_PORT_MATCHED) |
467 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 468 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 469 | else |
b99d6ba9 | 470 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
471 | } |
472 | } | |
473 | ||
474 | /** | |
475 | * __record_default - record default parameters | |
476 | * @port: the port we're looking at | |
477 | * | |
478 | * This function records the default parameter values for the partner carried | |
479 | * in the Partner Admin parameters as the current partner operational parameter | |
480 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
481 | */ | |
482 | static void __record_default(struct port *port) | |
483 | { | |
1da177e4 LT |
484 | if (port) { |
485 | // record the partner admin parameters | |
5eefd1ad HE |
486 | memcpy(&port->partner_oper, &port->partner_admin, |
487 | sizeof(struct port_params)); | |
1da177e4 LT |
488 | |
489 | // set actor_oper_port_state.defaulted to true | |
490 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; | |
491 | } | |
492 | } | |
493 | ||
494 | /** | |
495 | * __update_selected - update a port's Selected variable from a received lacpdu | |
496 | * @lacpdu: the lacpdu we've received | |
497 | * @port: the port we're looking at | |
498 | * | |
499 | * Update the value of the selected variable, using parameter values from a | |
500 | * newly received lacpdu. The parameter values for the Actor carried in the | |
501 | * received PDU are compared with the corresponding operational parameter | |
502 | * values for the ports partner. If one or more of the comparisons shows that | |
503 | * the value(s) received in the PDU differ from the current operational values, | |
504 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
505 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
506 | */ | |
507 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
508 | { | |
1da177e4 | 509 | if (lacpdu && port) { |
ce6a49ad HE |
510 | const struct port_params *partner = &port->partner_oper; |
511 | ||
815117ad | 512 | /* check if any parameter is different then |
513 | * update the state machine selected variable. | |
514 | */ | |
8e95a202 JP |
515 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
516 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
815117ad | 517 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
8e95a202 JP |
518 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
519 | ntohs(lacpdu->actor_key) != partner->key || | |
520 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
521 | port->sm_vars &= ~AD_PORT_SELECTED; |
522 | } | |
523 | } | |
524 | } | |
525 | ||
526 | /** | |
527 | * __update_default_selected - update a port's Selected variable from Partner | |
528 | * @port: the port we're looking at | |
529 | * | |
530 | * This function updates the value of the selected variable, using the partner | |
531 | * administrative parameter values. The administrative values are compared with | |
532 | * the corresponding operational parameter values for the partner. If one or | |
533 | * more of the comparisons shows that the administrative value(s) differ from | |
534 | * the current operational values, then Selected is set to FALSE and | |
535 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
536 | * Selected remains unchanged. | |
537 | */ | |
538 | static void __update_default_selected(struct port *port) | |
539 | { | |
1da177e4 | 540 | if (port) { |
3c52065f HE |
541 | const struct port_params *admin = &port->partner_admin; |
542 | const struct port_params *oper = &port->partner_oper; | |
543 | ||
815117ad | 544 | /* check if any parameter is different then |
545 | * update the state machine selected variable. | |
546 | */ | |
8e95a202 JP |
547 | if (admin->port_number != oper->port_number || |
548 | admin->port_priority != oper->port_priority || | |
815117ad | 549 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
8e95a202 JP |
550 | admin->system_priority != oper->system_priority || |
551 | admin->key != oper->key || | |
552 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 553 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
554 | port->sm_vars &= ~AD_PORT_SELECTED; |
555 | } | |
556 | } | |
557 | } | |
558 | ||
1da177e4 LT |
559 | /** |
560 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
561 | * @lacpdu: the lacpdu we've received | |
562 | * @port: the port we're looking at | |
563 | * | |
564 | * Updates the value of the ntt variable, using parameter values from a newly | |
565 | * received lacpdu. The parameter values for the partner carried in the | |
566 | * received PDU are compared with the corresponding operational parameter | |
567 | * values for the Actor. If one or more of the comparisons shows that the | |
568 | * value(s) received in the PDU differ from the current operational values, | |
569 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
570 | */ | |
571 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
572 | { | |
815117ad | 573 | /* validate lacpdu and port */ |
1da177e4 | 574 | if (lacpdu && port) { |
815117ad | 575 | /* check if any parameter is different then |
576 | * update the port->ntt. | |
577 | */ | |
89cc76f9 JV |
578 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
579 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
815117ad | 580 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
581 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
582 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
583 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
584 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
585 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
586 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
587 | ) { | |
d238d458 | 588 | port->ntt = true; |
1da177e4 LT |
589 | } |
590 | } | |
591 | } | |
592 | ||
593 | /** | |
594 | * __attach_bond_to_agg | |
595 | * @port: the port we're looking at | |
596 | * | |
597 | * Handle the attaching of the port's control parser/multiplexer and the | |
598 | * aggregator. This function does nothing since the parser/multiplexer of the | |
599 | * receive and the parser/multiplexer of the aggregator are already combined. | |
600 | */ | |
601 | static void __attach_bond_to_agg(struct port *port) | |
602 | { | |
128ea6c3 | 603 | port = NULL; /* just to satisfy the compiler */ |
1da177e4 LT |
604 | // This function does nothing since the parser/multiplexer of the receive |
605 | // and the parser/multiplexer of the aggregator are already combined | |
606 | } | |
607 | ||
608 | /** | |
609 | * __detach_bond_from_agg | |
610 | * @port: the port we're looking at | |
611 | * | |
612 | * Handle the detaching of the port's control parser/multiplexer from the | |
613 | * aggregator. This function does nothing since the parser/multiplexer of the | |
614 | * receive and the parser/multiplexer of the aggregator are already combined. | |
615 | */ | |
616 | static void __detach_bond_from_agg(struct port *port) | |
617 | { | |
128ea6c3 | 618 | port = NULL; /* just to satisfy the compiler */ |
b9d6d2db | 619 | // This function does nothing since the parser/multiplexer of the receive |
1da177e4 LT |
620 | // and the parser/multiplexer of the aggregator are already combined |
621 | } | |
622 | ||
623 | /** | |
624 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
625 | * @aggregator: the aggregator we're looking at | |
626 | * | |
627 | */ | |
628 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
629 | { | |
630 | struct port *port; | |
631 | int retval = 1; | |
632 | ||
633 | if (aggregator) { | |
634 | // scan all ports in this aggregator to verfy if they are all ready | |
128ea6c3 BD |
635 | for (port = aggregator->lag_ports; |
636 | port; | |
637 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
638 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
639 | retval = 0; | |
640 | break; | |
641 | } | |
642 | } | |
643 | } | |
644 | ||
645 | return retval; | |
646 | } | |
647 | ||
648 | /** | |
649 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
650 | * @aggregator: the aggregator we're looking at | |
651 | * @val: Should the ports' ready bit be set on or off | |
652 | * | |
653 | */ | |
654 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
655 | { | |
656 | struct port *port; | |
657 | ||
128ea6c3 BD |
658 | for (port = aggregator->lag_ports; port; |
659 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 660 | if (val) |
1da177e4 | 661 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 662 | else |
1da177e4 | 663 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
664 | } |
665 | } | |
666 | ||
667 | /** | |
668 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
669 | * @aggregator: the aggregator we're looking at | |
670 | * | |
671 | */ | |
672 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
673 | { | |
128ea6c3 | 674 | u32 bandwidth = 0; |
1da177e4 LT |
675 | |
676 | if (aggregator->num_of_ports) { | |
65cce19c | 677 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
678 | case AD_LINK_SPEED_BITMASK_1MBPS: |
679 | bandwidth = aggregator->num_of_ports; | |
680 | break; | |
681 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
682 | bandwidth = aggregator->num_of_ports * 10; | |
683 | break; | |
684 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
685 | bandwidth = aggregator->num_of_ports * 100; | |
686 | break; | |
687 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
688 | bandwidth = aggregator->num_of_ports * 1000; | |
689 | break; | |
94dbffd5 JV |
690 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
691 | bandwidth = aggregator->num_of_ports * 10000; | |
692 | break; | |
1da177e4 | 693 | default: |
128ea6c3 | 694 | bandwidth = 0; /*to silence the compiler ....*/ |
1da177e4 LT |
695 | } |
696 | } | |
697 | return bandwidth; | |
698 | } | |
699 | ||
700 | /** | |
701 | * __get_active_agg - get the current active aggregator | |
702 | * @aggregator: the aggregator we're looking at | |
703 | * | |
704 | */ | |
705 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
706 | { | |
19177e7d VF |
707 | struct bonding *bond = aggregator->slave->bond; |
708 | struct list_head *iter; | |
709 | struct slave *slave; | |
1da177e4 | 710 | |
be79bd04 | 711 | rcu_read_lock(); |
712 | bond_for_each_slave_rcu(bond, slave, iter) | |
713 | if (SLAVE_AD_INFO(slave).aggregator.is_active) { | |
714 | rcu_read_unlock(); | |
19177e7d | 715 | return &(SLAVE_AD_INFO(slave).aggregator); |
be79bd04 | 716 | } |
717 | rcu_read_unlock(); | |
1da177e4 | 718 | |
19177e7d | 719 | return NULL; |
1da177e4 LT |
720 | } |
721 | ||
722 | /** | |
723 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
724 | * @port: the port we're looking at | |
725 | * | |
726 | */ | |
727 | static inline void __update_lacpdu_from_port(struct port *port) | |
728 | { | |
729 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 730 | const struct port_params *partner = &port->partner_oper; |
1da177e4 LT |
731 | |
732 | /* update current actual Actor parameters */ | |
733 | /* lacpdu->subtype initialized | |
734 | * lacpdu->version_number initialized | |
735 | * lacpdu->tlv_type_actor_info initialized | |
736 | * lacpdu->actor_information_length initialized | |
737 | */ | |
738 | ||
d3bb52b0 | 739 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 740 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
741 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
742 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
743 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
744 | lacpdu->actor_state = port->actor_oper_port_state; |
745 | ||
746 | /* lacpdu->reserved_3_1 initialized | |
747 | * lacpdu->tlv_type_partner_info initialized | |
748 | * lacpdu->partner_information_length initialized | |
749 | */ | |
750 | ||
3b5b35d0 HE |
751 | lacpdu->partner_system_priority = htons(partner->system_priority); |
752 | lacpdu->partner_system = partner->system; | |
753 | lacpdu->partner_key = htons(partner->key); | |
754 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
755 | lacpdu->partner_port = htons(partner->port_number); | |
756 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
757 | |
758 | /* lacpdu->reserved_3_2 initialized | |
759 | * lacpdu->tlv_type_collector_info initialized | |
760 | * lacpdu->collector_information_length initialized | |
761 | * collector_max_delay initialized | |
762 | * reserved_12[12] initialized | |
763 | * tlv_type_terminator initialized | |
764 | * terminator_length initialized | |
765 | * reserved_50[50] initialized | |
766 | */ | |
1da177e4 LT |
767 | } |
768 | ||
769 | ////////////////////////////////////////////////////////////////////////////////////// | |
770 | // ================= main 802.3ad protocol code ====================================== | |
771 | ////////////////////////////////////////////////////////////////////////////////////// | |
772 | ||
773 | /** | |
774 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
775 | * @port: the port we're looking at | |
776 | * | |
777 | * Returns: 0 on success | |
778 | * < 0 on error | |
779 | */ | |
780 | static int ad_lacpdu_send(struct port *port) | |
781 | { | |
782 | struct slave *slave = port->slave; | |
783 | struct sk_buff *skb; | |
784 | struct lacpdu_header *lacpdu_header; | |
785 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
786 | |
787 | skb = dev_alloc_skb(length); | |
7bfc4753 | 788 | if (!skb) |
1da177e4 | 789 | return -ENOMEM; |
1da177e4 LT |
790 | |
791 | skb->dev = slave->dev; | |
459a98ed | 792 | skb_reset_mac_header(skb); |
b0e380b1 | 793 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
794 | skb->protocol = PKT_TYPE_LACPDU; |
795 | skb->priority = TC_PRIO_CONTROL; | |
796 | ||
797 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
798 | ||
e727149e | 799 | memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 800 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 801 | because we use it to identify loopback lacpdus in receive. */ |
e727149e HE |
802 | memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
803 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
804 | |
805 | lacpdu_header->lacpdu = port->lacpdu; // struct copy | |
806 | ||
807 | dev_queue_xmit(skb); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | /** | |
813 | * ad_marker_send - send marker information/response on a given port | |
814 | * @port: the port we're looking at | |
815 | * @marker: marker data to send | |
816 | * | |
817 | * Returns: 0 on success | |
818 | * < 0 on error | |
819 | */ | |
1c3f0b8e | 820 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
821 | { |
822 | struct slave *slave = port->slave; | |
823 | struct sk_buff *skb; | |
1c3f0b8e MD |
824 | struct bond_marker_header *marker_header; |
825 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
826 | |
827 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 828 | if (!skb) |
1da177e4 | 829 | return -ENOMEM; |
1da177e4 LT |
830 | |
831 | skb_reserve(skb, 16); | |
832 | ||
833 | skb->dev = slave->dev; | |
459a98ed | 834 | skb_reset_mac_header(skb); |
b0e380b1 | 835 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
836 | skb->protocol = PKT_TYPE_LACPDU; |
837 | ||
1c3f0b8e | 838 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 839 | |
e727149e | 840 | memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 841 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 842 | because we use it to identify loopback MARKERs in receive. */ |
e727149e HE |
843 | memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
844 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
845 | |
846 | marker_header->marker = *marker; // struct copy | |
847 | ||
848 | dev_queue_xmit(skb); | |
849 | ||
850 | return 0; | |
851 | } | |
852 | ||
853 | /** | |
854 | * ad_mux_machine - handle a port's mux state machine | |
855 | * @port: the port we're looking at | |
856 | * | |
857 | */ | |
858 | static void ad_mux_machine(struct port *port) | |
859 | { | |
860 | mux_states_t last_state; | |
861 | ||
862 | // keep current State Machine state to compare later if it was changed | |
863 | last_state = port->sm_mux_state; | |
864 | ||
865 | if (port->sm_vars & AD_PORT_BEGIN) { | |
866 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
867 | } else { | |
868 | switch (port->sm_mux_state) { | |
869 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
870 | if ((port->sm_vars & AD_PORT_SELECTED) |
871 | || (port->sm_vars & AD_PORT_STANDBY)) | |
872 | /* if SELECTED or STANDBY */ | |
1da177e4 | 873 | port->sm_mux_state = AD_MUX_WAITING; // next state |
1da177e4 LT |
874 | break; |
875 | case AD_MUX_WAITING: | |
876 | // if SELECTED == FALSE return to DETACH state | |
877 | if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED | |
878 | port->sm_vars &= ~AD_PORT_READY_N; | |
879 | // in order to withhold the Selection Logic to check all ports READY_N value | |
880 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
881 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
882 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
883 | break; | |
884 | } | |
885 | ||
886 | // check if the wait_while_timer expired | |
7bfc4753 BD |
887 | if (port->sm_mux_timer_counter |
888 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 889 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 LT |
890 | |
891 | // in order to withhold the selection logic to check all ports READY_N value | |
892 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
893 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
894 | ||
895 | // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state | |
7bfc4753 BD |
896 | if ((port->sm_vars & AD_PORT_READY) |
897 | && !port->sm_mux_timer_counter) | |
1da177e4 | 898 | port->sm_mux_state = AD_MUX_ATTACHED; // next state |
1da177e4 LT |
899 | break; |
900 | case AD_MUX_ATTACHED: | |
901 | // check also if agg_select_timer expired(so the edable port will take place only after this timer) | |
1055c9ab | 902 | if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { |
1da177e4 LT |
903 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state |
904 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY | |
905 | port->sm_vars &= ~AD_PORT_READY_N; | |
906 | // in order to withhold the selection logic to check all ports READY_N value | |
907 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
908 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
909 | port->sm_mux_state = AD_MUX_DETACHED;// next state | |
910 | } | |
911 | break; | |
912 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
913 | if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || | |
1055c9ab | 914 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) |
1da177e4 LT |
915 | ) { |
916 | port->sm_mux_state = AD_MUX_ATTACHED;// next state | |
917 | ||
918 | } else { | |
919 | // if port state hasn't changed make | |
920 | // sure that a collecting distributing | |
921 | // port in an active aggregator is enabled | |
922 | if (port->aggregator && | |
923 | port->aggregator->is_active && | |
924 | !__port_is_enabled(port)) { | |
925 | ||
926 | __enable_port(port); | |
927 | } | |
928 | } | |
929 | break; | |
930 | default: //to silence the compiler | |
931 | break; | |
932 | } | |
933 | } | |
934 | ||
935 | // check if the state machine was changed | |
936 | if (port->sm_mux_state != last_state) { | |
a4aee5c8 JP |
937 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
938 | port->actor_port_number, last_state, | |
939 | port->sm_mux_state); | |
1da177e4 LT |
940 | switch (port->sm_mux_state) { |
941 | case AD_MUX_DETACHED: | |
942 | __detach_bond_from_agg(port); | |
943 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
944 | ad_disable_collecting_distributing(port); | |
945 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
946 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 947 | port->ntt = true; |
1da177e4 LT |
948 | break; |
949 | case AD_MUX_WAITING: | |
950 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
951 | break; | |
952 | case AD_MUX_ATTACHED: | |
953 | __attach_bond_to_agg(port); | |
954 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
955 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
956 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
957 | ad_disable_collecting_distributing(port); | |
d238d458 | 958 | port->ntt = true; |
1da177e4 LT |
959 | break; |
960 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
961 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
962 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
963 | ad_enable_collecting_distributing(port); | |
d238d458 | 964 | port->ntt = true; |
1da177e4 LT |
965 | break; |
966 | default: //to silence the compiler | |
967 | break; | |
968 | } | |
969 | } | |
970 | } | |
971 | ||
972 | /** | |
973 | * ad_rx_machine - handle a port's rx State Machine | |
974 | * @lacpdu: the lacpdu we've received | |
975 | * @port: the port we're looking at | |
976 | * | |
977 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
978 | * CURRENT. If timer expired set the state machine in the proper state. | |
979 | * In other cases, this function checks if we need to switch to other state. | |
980 | */ | |
981 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
982 | { | |
983 | rx_states_t last_state; | |
984 | ||
1da177e4 LT |
985 | // keep current State Machine state to compare later if it was changed |
986 | last_state = port->sm_rx_state; | |
987 | ||
988 | // check if state machine should change state | |
989 | // first, check if port was reinitialized | |
7bfc4753 BD |
990 | if (port->sm_vars & AD_PORT_BEGIN) |
991 | /* next state */ | |
992 | port->sm_rx_state = AD_RX_INITIALIZE; | |
1da177e4 | 993 | // check if port is not enabled |
7bfc4753 BD |
994 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
995 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
996 | /* next state */ | |
997 | port->sm_rx_state = AD_RX_PORT_DISABLED; | |
1da177e4 LT |
998 | // check if new lacpdu arrived |
999 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { | |
1000 | port->sm_rx_timer_counter = 0; // zero timer | |
1001 | port->sm_rx_state = AD_RX_CURRENT; | |
1002 | } else { | |
1003 | // if timer is on, and if it is expired | |
1004 | if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { | |
1005 | switch (port->sm_rx_state) { | |
1006 | case AD_RX_EXPIRED: | |
1007 | port->sm_rx_state = AD_RX_DEFAULTED; // next state | |
1008 | break; | |
1009 | case AD_RX_CURRENT: | |
1010 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1011 | break; | |
1012 | default: //to silence the compiler | |
1013 | break; | |
1014 | } | |
1015 | } else { | |
1016 | // if no lacpdu arrived and no timer is on | |
1017 | switch (port->sm_rx_state) { | |
1018 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 1019 | if (port->sm_vars & AD_PORT_MOVED) |
1da177e4 | 1020 | port->sm_rx_state = AD_RX_INITIALIZE; // next state |
7bfc4753 BD |
1021 | else if (port->is_enabled |
1022 | && (port->sm_vars | |
1023 | & AD_PORT_LACP_ENABLED)) | |
1da177e4 | 1024 | port->sm_rx_state = AD_RX_EXPIRED; // next state |
7bfc4753 BD |
1025 | else if (port->is_enabled |
1026 | && ((port->sm_vars | |
1027 | & AD_PORT_LACP_ENABLED) == 0)) | |
1da177e4 | 1028 | port->sm_rx_state = AD_RX_LACP_DISABLED; // next state |
1da177e4 LT |
1029 | break; |
1030 | default: //to silence the compiler | |
1031 | break; | |
1032 | ||
1033 | } | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | // check if the State machine was changed or new lacpdu arrived | |
1038 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
a4aee5c8 JP |
1039 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1040 | port->actor_port_number, last_state, | |
1041 | port->sm_rx_state); | |
1da177e4 LT |
1042 | switch (port->sm_rx_state) { |
1043 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1044 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1045 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1046 | else |
1da177e4 | 1047 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1048 | port->sm_vars &= ~AD_PORT_SELECTED; |
1049 | __record_default(port); | |
1050 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1051 | port->sm_vars &= ~AD_PORT_MOVED; | |
1052 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1053 | ||
1054 | /*- Fall Through -*/ | |
1055 | ||
1056 | case AD_RX_PORT_DISABLED: | |
1057 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1058 | break; | |
1059 | case AD_RX_LACP_DISABLED: | |
1060 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1061 | __record_default(port); | |
1055c9ab | 1062 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1063 | port->sm_vars |= AD_PORT_MATCHED; |
1064 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1065 | break; | |
1066 | case AD_RX_EXPIRED: | |
1067 | //Reset of the Synchronization flag. (Standard 43.4.12) | |
1068 | //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the | |
1069 | //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. | |
1055c9ab | 1070 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1071 | port->sm_vars &= ~AD_PORT_MATCHED; |
8e321c4f JL |
1072 | port->partner_oper.port_state |= |
1073 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 LT |
1074 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1075 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1076 | break; | |
1077 | case AD_RX_DEFAULTED: | |
1078 | __update_default_selected(port); | |
1079 | __record_default(port); | |
1080 | port->sm_vars |= AD_PORT_MATCHED; | |
1081 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1082 | break; | |
1083 | case AD_RX_CURRENT: | |
815117ad | 1084 | /* detect loopback situation */ |
1085 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), &(port->actor_system))) { | |
a4aee5c8 JP |
1086 | pr_err("%s: An illegal loopback occurred on adapter (%s).\n" |
1087 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", | |
471cb5a3 | 1088 | port->slave->bond->dev->name, port->slave->dev->name); |
1da177e4 LT |
1089 | return; |
1090 | } | |
1091 | __update_selected(lacpdu, port); | |
1092 | __update_ntt(lacpdu, port); | |
1093 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1094 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1095 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 | 1096 | break; |
815117ad | 1097 | default: /* to silence the compiler */ |
1da177e4 LT |
1098 | break; |
1099 | } | |
1100 | } | |
1da177e4 LT |
1101 | } |
1102 | ||
1103 | /** | |
1104 | * ad_tx_machine - handle a port's tx state machine | |
1105 | * @port: the port we're looking at | |
1106 | * | |
1107 | */ | |
1108 | static void ad_tx_machine(struct port *port) | |
1109 | { | |
1110 | // check if tx timer expired, to verify that we do not send more than 3 packets per second | |
1111 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1112 | // check if there is something to send | |
1113 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1114 | __update_lacpdu_from_port(port); | |
d238d458 | 1115 | |
1da177e4 | 1116 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1117 | pr_debug("Sent LACPDU on port %d\n", |
1118 | port->actor_port_number); | |
d238d458 HE |
1119 | |
1120 | /* mark ntt as false, so it will not be sent again until | |
1121 | demanded */ | |
1122 | port->ntt = false; | |
1da177e4 LT |
1123 | } |
1124 | } | |
1125 | // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND | |
128ea6c3 BD |
1126 | port->sm_tx_timer_counter = |
1127 | ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1128 | } |
1129 | } | |
1130 | ||
1131 | /** | |
1132 | * ad_periodic_machine - handle a port's periodic state machine | |
1133 | * @port: the port we're looking at | |
1134 | * | |
1135 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1136 | */ | |
1137 | static void ad_periodic_machine(struct port *port) | |
1138 | { | |
1139 | periodic_states_t last_state; | |
1140 | ||
1141 | // keep current state machine state to compare later if it was changed | |
1142 | last_state = port->sm_periodic_state; | |
1143 | ||
1144 | // check if port was reinitialized | |
1145 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || | |
1055c9ab | 1146 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 LT |
1147 | ) { |
1148 | port->sm_periodic_state = AD_NO_PERIODIC; // next state | |
1149 | } | |
1150 | // check if state machine should change state | |
1151 | else if (port->sm_periodic_timer_counter) { | |
1152 | // check if periodic state machine expired | |
1153 | if (!(--port->sm_periodic_timer_counter)) { | |
1154 | // if expired then do tx | |
1155 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1156 | } else { | |
1157 | // If not expired, check if there is some new timeout parameter from the partner state | |
1158 | switch (port->sm_periodic_state) { | |
1159 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1160 | if (!(port->partner_oper.port_state |
1161 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1162 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
1da177e4 LT |
1163 | break; |
1164 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1165 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 LT |
1166 | // stop current timer |
1167 | port->sm_periodic_timer_counter = 0; | |
1168 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1169 | } | |
1170 | break; | |
1171 | default: //to silence the compiler | |
1172 | break; | |
1173 | } | |
1174 | } | |
1175 | } else { | |
1176 | switch (port->sm_periodic_state) { | |
1177 | case AD_NO_PERIODIC: | |
1178 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1179 | break; | |
1180 | case AD_PERIODIC_TX: | |
7bfc4753 BD |
1181 | if (!(port->partner_oper.port_state |
1182 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1183 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
7bfc4753 | 1184 | else |
1da177e4 | 1185 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state |
1da177e4 LT |
1186 | break; |
1187 | default: //to silence the compiler | |
1188 | break; | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | // check if the state machine was changed | |
1193 | if (port->sm_periodic_state != last_state) { | |
a4aee5c8 JP |
1194 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1195 | port->actor_port_number, last_state, | |
1196 | port->sm_periodic_state); | |
1da177e4 LT |
1197 | switch (port->sm_periodic_state) { |
1198 | case AD_NO_PERIODIC: | |
1199 | port->sm_periodic_timer_counter = 0; // zero timer | |
1200 | break; | |
1201 | case AD_FAST_PERIODIC: | |
1202 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle | |
1203 | break; | |
1204 | case AD_SLOW_PERIODIC: | |
1205 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle | |
1206 | break; | |
1207 | case AD_PERIODIC_TX: | |
d238d458 | 1208 | port->ntt = true; |
1da177e4 LT |
1209 | break; |
1210 | default: //to silence the compiler | |
1211 | break; | |
1212 | } | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * ad_port_selection_logic - select aggregation groups | |
1218 | * @port: the port we're looking at | |
1219 | * | |
1220 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1221 | * selection logic is called in the inititalization (after all the handshkes), | |
1222 | * and after every lacpdu receive (if selected is off). | |
1223 | */ | |
1224 | static void ad_port_selection_logic(struct port *port) | |
1225 | { | |
1226 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1227 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1228 | struct list_head *iter; |
1229 | struct bonding *bond; | |
1230 | struct slave *slave; | |
1da177e4 LT |
1231 | int found = 0; |
1232 | ||
1233 | // if the port is already Selected, do nothing | |
7bfc4753 | 1234 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1235 | return; |
1da177e4 | 1236 | |
3e36bb75 VF |
1237 | bond = __get_bond_by_port(port); |
1238 | ||
1da177e4 LT |
1239 | // if the port is connected to other aggregator, detach it |
1240 | if (port->aggregator) { | |
1241 | // detach the port from its former aggregator | |
128ea6c3 BD |
1242 | temp_aggregator = port->aggregator; |
1243 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1244 | last_port = curr_port, | |
1245 | curr_port = curr_port->next_port_in_aggregator) { | |
1da177e4 LT |
1246 | if (curr_port == port) { |
1247 | temp_aggregator->num_of_ports--; | |
1248 | if (!last_port) {// if it is the first port attached to the aggregator | |
128ea6c3 BD |
1249 | temp_aggregator->lag_ports = |
1250 | port->next_port_in_aggregator; | |
1da177e4 | 1251 | } else {// not the first port attached to the aggregator |
128ea6c3 BD |
1252 | last_port->next_port_in_aggregator = |
1253 | port->next_port_in_aggregator; | |
1da177e4 LT |
1254 | } |
1255 | ||
1256 | // clear the port's relations to this aggregator | |
1257 | port->aggregator = NULL; | |
128ea6c3 BD |
1258 | port->next_port_in_aggregator = NULL; |
1259 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1260 | |
a4aee5c8 JP |
1261 | pr_debug("Port %d left LAG %d\n", |
1262 | port->actor_port_number, | |
1263 | temp_aggregator->aggregator_identifier); | |
1da177e4 | 1264 | // if the aggregator is empty, clear its parameters, and set it ready to be attached |
7bfc4753 | 1265 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1266 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1267 | break; |
1268 | } | |
1269 | } | |
1270 | if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list | |
a4aee5c8 | 1271 | pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
471cb5a3 | 1272 | port->slave->bond->dev->name, |
e5e2a8fd JP |
1273 | port->actor_port_number, |
1274 | port->slave->dev->name, | |
1275 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1276 | } |
1277 | } | |
1278 | // search on all aggregators for a suitable aggregator for this port | |
3e36bb75 VF |
1279 | bond_for_each_slave(bond, slave, iter) { |
1280 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1da177e4 LT |
1281 | |
1282 | // keep a free aggregator for later use(if needed) | |
1283 | if (!aggregator->lag_ports) { | |
7bfc4753 | 1284 | if (!free_aggregator) |
128ea6c3 | 1285 | free_aggregator = aggregator; |
1da177e4 LT |
1286 | continue; |
1287 | } | |
815117ad | 1288 | /* check if current aggregator suits us */ |
1289 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1290 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1055c9ab HE |
1291 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
1292 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1293 | ) && |
815117ad | 1294 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
1295 | !aggregator->is_individual) /* but is not individual OR */ | |
1da177e4 LT |
1296 | ) |
1297 | ) { | |
815117ad | 1298 | /* attach to the founded aggregator */ |
1da177e4 | 1299 | port->aggregator = aggregator; |
128ea6c3 BD |
1300 | port->actor_port_aggregator_identifier = |
1301 | port->aggregator->aggregator_identifier; | |
1302 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1303 | port->aggregator->num_of_ports++; |
128ea6c3 | 1304 | aggregator->lag_ports = port; |
a4aee5c8 JP |
1305 | pr_debug("Port %d joined LAG %d(existing LAG)\n", |
1306 | port->actor_port_number, | |
1307 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1308 | |
1309 | // mark this port as selected | |
1310 | port->sm_vars |= AD_PORT_SELECTED; | |
1311 | found = 1; | |
1312 | break; | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | // the port couldn't find an aggregator - attach it to a new aggregator | |
1317 | if (!found) { | |
1318 | if (free_aggregator) { | |
1319 | // assign port a new aggregator | |
1320 | port->aggregator = free_aggregator; | |
128ea6c3 BD |
1321 | port->actor_port_aggregator_identifier = |
1322 | port->aggregator->aggregator_identifier; | |
1da177e4 LT |
1323 | |
1324 | // update the new aggregator's parameters | |
1325 | // if port was responsed from the end-user | |
7bfc4753 BD |
1326 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1327 | /* if port is full duplex */ | |
1624db7b | 1328 | port->aggregator->is_individual = false; |
7bfc4753 | 1329 | else |
1624db7b | 1330 | port->aggregator->is_individual = true; |
1da177e4 LT |
1331 | |
1332 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1333 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1334 | port->aggregator->partner_system = |
1335 | port->partner_oper.system; | |
1336 | port->aggregator->partner_system_priority = | |
1337 | port->partner_oper.system_priority; | |
1055c9ab | 1338 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1339 | port->aggregator->receive_state = 1; |
1340 | port->aggregator->transmit_state = 1; | |
1341 | port->aggregator->lag_ports = port; | |
1342 | port->aggregator->num_of_ports++; | |
1343 | ||
1344 | // mark this port as selected | |
1345 | port->sm_vars |= AD_PORT_SELECTED; | |
1346 | ||
a4aee5c8 JP |
1347 | pr_debug("Port %d joined LAG %d(new LAG)\n", |
1348 | port->actor_port_number, | |
1349 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1350 | } else { |
a4aee5c8 | 1351 | pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", |
471cb5a3 | 1352 | port->slave->bond->dev->name, |
1da177e4 LT |
1353 | port->actor_port_number, port->slave->dev->name); |
1354 | } | |
1355 | } | |
1356 | // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports | |
1357 | // else set ready=FALSE in all aggregator's ports | |
1358 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1359 | ||
fd989c83 JV |
1360 | aggregator = __get_first_agg(port); |
1361 | ad_agg_selection_logic(aggregator); | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * Decide if "agg" is a better choice for the new active aggregator that | |
1366 | * the current best, according to the ad_select policy. | |
1367 | */ | |
1368 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1369 | struct aggregator *curr) | |
1370 | { | |
1371 | /* | |
1372 | * 0. If no best, select current. | |
1373 | * | |
1374 | * 1. If the current agg is not individual, and the best is | |
1375 | * individual, select current. | |
1376 | * | |
1377 | * 2. If current agg is individual and the best is not, keep best. | |
1378 | * | |
1379 | * 3. Therefore, current and best are both individual or both not | |
1380 | * individual, so: | |
1381 | * | |
1382 | * 3a. If current agg partner replied, and best agg partner did not, | |
1383 | * select current. | |
1384 | * | |
1385 | * 3b. If current agg partner did not reply and best agg partner | |
1386 | * did reply, keep best. | |
1387 | * | |
1388 | * 4. Therefore, current and best both have partner replies or | |
1389 | * both do not, so perform selection policy: | |
1390 | * | |
1391 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1392 | * select by bandwidth. | |
1393 | * | |
1394 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1395 | */ | |
1396 | if (!best) | |
1397 | return curr; | |
1398 | ||
1399 | if (!curr->is_individual && best->is_individual) | |
1400 | return curr; | |
1401 | ||
1402 | if (curr->is_individual && !best->is_individual) | |
1403 | return best; | |
1404 | ||
1405 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1406 | return curr; | |
1407 | ||
1408 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1409 | return best; | |
1410 | ||
1411 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1412 | case BOND_AD_COUNT: | |
1413 | if (curr->num_of_ports > best->num_of_ports) | |
1414 | return curr; | |
1415 | ||
1416 | if (curr->num_of_ports < best->num_of_ports) | |
1417 | return best; | |
1418 | ||
1419 | /*FALLTHROUGH*/ | |
1420 | case BOND_AD_STABLE: | |
1421 | case BOND_AD_BANDWIDTH: | |
1422 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1423 | return curr; | |
1424 | ||
1425 | break; | |
1426 | ||
1427 | default: | |
a4aee5c8 | 1428 | pr_warning("%s: Impossible agg select mode %d\n", |
471cb5a3 | 1429 | curr->slave->bond->dev->name, |
e5e2a8fd | 1430 | __get_agg_selection_mode(curr->lag_ports)); |
fd989c83 | 1431 | break; |
1da177e4 | 1432 | } |
fd989c83 JV |
1433 | |
1434 | return best; | |
1da177e4 LT |
1435 | } |
1436 | ||
4cd6fe1c SH |
1437 | static int agg_device_up(const struct aggregator *agg) |
1438 | { | |
2430af8b JB |
1439 | struct port *port = agg->lag_ports; |
1440 | if (!port) | |
1441 | return 0; | |
1442 | return (netif_running(port->slave->dev) && | |
1443 | netif_carrier_ok(port->slave->dev)); | |
4cd6fe1c SH |
1444 | } |
1445 | ||
1da177e4 LT |
1446 | /** |
1447 | * ad_agg_selection_logic - select an aggregation group for a team | |
1448 | * @aggregator: the aggregator we're looking at | |
1449 | * | |
1450 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1451 | * |
1452 | * The logic of this function is to select the aggregator according to | |
1453 | * the ad_select policy: | |
1454 | * | |
1455 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1456 | * it, and to reselect the active aggregator only if the previous | |
1457 | * aggregator has no more ports related to it. | |
1458 | * | |
1459 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1460 | * bandwidth, and reselect whenever a link state change takes place or the | |
1461 | * set of slaves in the bond changes. | |
1462 | * | |
1463 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1464 | * (slaves), and reselect whenever a link state change takes place or the | |
1465 | * set of slaves in the bond changes. | |
1da177e4 LT |
1466 | * |
1467 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1468 | * __get_active_agg() won't work correctly. This function should be better | |
1469 | * called with the bond itself, and retrieve the first agg from it. | |
1470 | */ | |
fd989c83 | 1471 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1472 | { |
fd989c83 | 1473 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1474 | struct bonding *bond = agg->slave->bond; |
1475 | struct list_head *iter; | |
1476 | struct slave *slave; | |
1da177e4 | 1477 | struct port *port; |
1da177e4 | 1478 | |
fd989c83 | 1479 | origin = agg; |
fd989c83 | 1480 | active = __get_active_agg(agg); |
4cd6fe1c | 1481 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1482 | |
be79bd04 | 1483 | rcu_read_lock(); |
1484 | bond_for_each_slave_rcu(bond, slave, iter) { | |
bef1fcce VF |
1485 | agg = &(SLAVE_AD_INFO(slave).aggregator); |
1486 | ||
fd989c83 JV |
1487 | agg->is_active = 0; |
1488 | ||
4cd6fe1c | 1489 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1490 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1491 | } |
fd989c83 JV |
1492 | |
1493 | if (best && | |
1494 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
1495 | /* | |
1496 | * For the STABLE policy, don't replace the old active | |
1497 | * aggregator if it's still active (it has an answering | |
1498 | * partner) or if both the best and active don't have an | |
1499 | * answering partner. | |
1500 | */ | |
1501 | if (active && active->lag_ports && | |
1502 | active->lag_ports->is_enabled && | |
1503 | (__agg_has_partner(active) || | |
1504 | (!__agg_has_partner(active) && !__agg_has_partner(best)))) { | |
1505 | if (!(!active->actor_oper_aggregator_key && | |
1506 | best->actor_oper_aggregator_key)) { | |
1507 | best = NULL; | |
1508 | active->is_active = 1; | |
1da177e4 LT |
1509 | } |
1510 | } | |
fd989c83 | 1511 | } |
1da177e4 | 1512 | |
fd989c83 JV |
1513 | if (best && (best == active)) { |
1514 | best = NULL; | |
1515 | active->is_active = 1; | |
1da177e4 LT |
1516 | } |
1517 | ||
be79bd04 | 1518 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1519 | if (best) { |
5a03cdb7 | 1520 | pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1521 | best->aggregator_identifier, best->num_of_ports, |
1522 | best->actor_oper_aggregator_key, | |
1523 | best->partner_oper_aggregator_key, | |
1524 | best->is_individual, best->is_active); | |
5a03cdb7 | 1525 | pr_debug("best ports %p slave %p %s\n", |
a4aee5c8 JP |
1526 | best->lag_ports, best->slave, |
1527 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1528 | |
be79bd04 | 1529 | bond_for_each_slave_rcu(bond, slave, iter) { |
bef1fcce | 1530 | agg = &(SLAVE_AD_INFO(slave).aggregator); |
fd989c83 | 1531 | |
5a03cdb7 | 1532 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1533 | agg->aggregator_identifier, agg->num_of_ports, |
1534 | agg->actor_oper_aggregator_key, | |
1535 | agg->partner_oper_aggregator_key, | |
1536 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1537 | } |
1538 | ||
be79bd04 | 1539 | /* check if any partner replys */ |
fd989c83 | 1540 | if (best->is_individual) { |
a4aee5c8 | 1541 | pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
be79bd04 | 1542 | best->slave ? |
1543 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1544 | } |
1545 | ||
fd989c83 | 1546 | best->is_active = 1; |
5a03cdb7 | 1547 | pr_debug("LAG %d chosen as the active LAG\n", |
a4aee5c8 | 1548 | best->aggregator_identifier); |
5a03cdb7 | 1549 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1550 | best->aggregator_identifier, best->num_of_ports, |
1551 | best->actor_oper_aggregator_key, | |
1552 | best->partner_oper_aggregator_key, | |
1553 | best->is_individual, best->is_active); | |
1da177e4 | 1554 | |
be79bd04 | 1555 | /* disable the ports that were related to the former active_aggregator */ |
fd989c83 JV |
1556 | if (active) { |
1557 | for (port = active->lag_ports; port; | |
1558 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1559 | __disable_port(port); |
1560 | } | |
1561 | } | |
1562 | } | |
1563 | ||
fd989c83 JV |
1564 | /* |
1565 | * if the selected aggregator is of join individuals | |
1566 | * (partner_system is NULL), enable their ports | |
1567 | */ | |
1568 | active = __get_active_agg(origin); | |
1da177e4 | 1569 | |
fd989c83 JV |
1570 | if (active) { |
1571 | if (!__agg_has_partner(active)) { | |
1572 | for (port = active->lag_ports; port; | |
1573 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1574 | __enable_port(port); |
1575 | } | |
1576 | } | |
1577 | } | |
fd989c83 | 1578 | |
be79bd04 | 1579 | rcu_read_unlock(); |
1580 | ||
bef1fcce | 1581 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1582 | } |
1583 | ||
1584 | /** | |
1585 | * ad_clear_agg - clear a given aggregator's parameters | |
1586 | * @aggregator: the aggregator we're looking at | |
1587 | * | |
1588 | */ | |
1589 | static void ad_clear_agg(struct aggregator *aggregator) | |
1590 | { | |
1591 | if (aggregator) { | |
1624db7b | 1592 | aggregator->is_individual = false; |
1da177e4 LT |
1593 | aggregator->actor_admin_aggregator_key = 0; |
1594 | aggregator->actor_oper_aggregator_key = 0; | |
1595 | aggregator->partner_system = null_mac_addr; | |
1596 | aggregator->partner_system_priority = 0; | |
1597 | aggregator->partner_oper_aggregator_key = 0; | |
1598 | aggregator->receive_state = 0; | |
1599 | aggregator->transmit_state = 0; | |
1600 | aggregator->lag_ports = NULL; | |
1601 | aggregator->is_active = 0; | |
1602 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1603 | pr_debug("LAG %d was cleared\n", |
1604 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1605 | } |
1606 | } | |
1607 | ||
1608 | /** | |
1609 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1610 | * @aggregator: the aggregator we're looking at | |
1611 | * | |
1612 | */ | |
1613 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1614 | { | |
1615 | if (aggregator) { | |
1616 | ad_clear_agg(aggregator); | |
1617 | ||
1618 | aggregator->aggregator_mac_address = null_mac_addr; | |
1619 | aggregator->aggregator_identifier = 0; | |
1620 | aggregator->slave = NULL; | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | /** | |
1625 | * ad_initialize_port - initialize a given port's parameters | |
1626 | * @aggregator: the aggregator we're looking at | |
1627 | * @lacp_fast: boolean. whether fast periodic should be used | |
1628 | * | |
1629 | */ | |
1630 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1631 | { | |
c7e703d0 HE |
1632 | static const struct port_params tmpl = { |
1633 | .system_priority = 0xffff, | |
1634 | .key = 1, | |
1635 | .port_number = 1, | |
1636 | .port_priority = 0xff, | |
1637 | .port_state = 1, | |
1638 | }; | |
7addeef6 HE |
1639 | static const struct lacpdu lacpdu = { |
1640 | .subtype = 0x01, | |
1641 | .version_number = 0x01, | |
1642 | .tlv_type_actor_info = 0x01, | |
1643 | .actor_information_length = 0x14, | |
1644 | .tlv_type_partner_info = 0x02, | |
1645 | .partner_information_length = 0x14, | |
1646 | .tlv_type_collector_info = 0x03, | |
1647 | .collector_information_length = 0x10, | |
1648 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1649 | }; | |
c7e703d0 | 1650 | |
1da177e4 LT |
1651 | if (port) { |
1652 | port->actor_port_number = 1; | |
1653 | port->actor_port_priority = 0xff; | |
1654 | port->actor_system = null_mac_addr; | |
1655 | port->actor_system_priority = 0xffff; | |
1656 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1657 | port->ntt = false; |
1da177e4 LT |
1658 | port->actor_admin_port_key = 1; |
1659 | port->actor_oper_port_key = 1; | |
1660 | port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1661 | port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1662 | ||
7bfc4753 | 1663 | if (lacp_fast) |
1da177e4 | 1664 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1665 | |
c7e703d0 HE |
1666 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1667 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1668 | ||
f48127b6 | 1669 | port->is_enabled = true; |
1da177e4 LT |
1670 | // ****** private parameters ****** |
1671 | port->sm_vars = 0x3; | |
1672 | port->sm_rx_state = 0; | |
1673 | port->sm_rx_timer_counter = 0; | |
1674 | port->sm_periodic_state = 0; | |
1675 | port->sm_periodic_timer_counter = 0; | |
1676 | port->sm_mux_state = 0; | |
1677 | port->sm_mux_timer_counter = 0; | |
1678 | port->sm_tx_state = 0; | |
1679 | port->sm_tx_timer_counter = 0; | |
1680 | port->slave = NULL; | |
1681 | port->aggregator = NULL; | |
1682 | port->next_port_in_aggregator = NULL; | |
1683 | port->transaction_id = 0; | |
1684 | ||
7addeef6 | 1685 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1686 | } |
1687 | } | |
1688 | ||
1689 | /** | |
1690 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1691 | * @port: the port we're looking at | |
1692 | * | |
1693 | * Enable @port if it's in an active aggregator | |
1694 | */ | |
1695 | static void ad_enable_collecting_distributing(struct port *port) | |
1696 | { | |
1697 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1698 | pr_debug("Enabling port %d(LAG %d)\n", |
1699 | port->actor_port_number, | |
1700 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1701 | __enable_port(port); |
1702 | } | |
1703 | } | |
1704 | ||
1705 | /** | |
1706 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1707 | * @port: the port we're looking at | |
1708 | * | |
1709 | */ | |
1710 | static void ad_disable_collecting_distributing(struct port *port) | |
1711 | { | |
815117ad | 1712 | if (port->aggregator && !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), &(null_mac_addr))) { |
a4aee5c8 JP |
1713 | pr_debug("Disabling port %d(LAG %d)\n", |
1714 | port->actor_port_number, | |
1715 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1716 | __disable_port(port); |
1717 | } | |
1718 | } | |
1719 | ||
1720 | #if 0 | |
1721 | /** | |
1722 | * ad_marker_info_send - send a marker information frame | |
1723 | * @port: the port we're looking at | |
1724 | * | |
1725 | * This function does nothing since we decided not to implement send and handle | |
1726 | * response for marker PDU's, in this stage, but only to respond to marker | |
1727 | * information. | |
1728 | */ | |
1729 | static void ad_marker_info_send(struct port *port) | |
1730 | { | |
1c3f0b8e | 1731 | struct bond_marker marker; |
1da177e4 LT |
1732 | u16 index; |
1733 | ||
1734 | // fill the marker PDU with the appropriate values | |
1735 | marker.subtype = 0x02; | |
1736 | marker.version_number = 0x01; | |
1737 | marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; | |
1738 | marker.marker_length = 0x16; | |
1739 | // convert requester_port to Big Endian | |
1740 | marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); | |
1741 | marker.requester_system = port->actor_system; | |
1742 | // convert requester_port(u32) to Big Endian | |
128ea6c3 BD |
1743 | marker.requester_transaction_id = |
1744 | (((++port->transaction_id & 0xFF) << 24) | |
1745 | | ((port->transaction_id & 0xFF00) << 8) | |
1746 | | ((port->transaction_id & 0xFF0000) >> 8) | |
1747 | | ((port->transaction_id & 0xFF000000) >> 24)); | |
1da177e4 LT |
1748 | marker.pad = 0; |
1749 | marker.tlv_type_terminator = 0x00; | |
1750 | marker.terminator_length = 0x00; | |
128ea6c3 BD |
1751 | for (index = 0; index < 90; index++) |
1752 | marker.reserved_90[index] = 0; | |
1da177e4 LT |
1753 | |
1754 | // send the marker information | |
1755 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1756 | pr_debug("Sent Marker Information on port %d\n", |
1757 | port->actor_port_number); | |
1da177e4 LT |
1758 | } |
1759 | } | |
1760 | #endif | |
1761 | ||
1762 | /** | |
1763 | * ad_marker_info_received - handle receive of a Marker information frame | |
1764 | * @marker_info: Marker info received | |
1765 | * @port: the port we're looking at | |
1766 | * | |
1767 | */ | |
1c3f0b8e MD |
1768 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1769 | struct port *port) | |
1da177e4 | 1770 | { |
1c3f0b8e | 1771 | struct bond_marker marker; |
1da177e4 LT |
1772 | |
1773 | // copy the received marker data to the response marker | |
1774 | //marker = *marker_info; | |
1c3f0b8e | 1775 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
1da177e4 | 1776 | // change the marker subtype to marker response |
128ea6c3 | 1777 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 LT |
1778 | // send the marker response |
1779 | ||
1780 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1781 | pr_debug("Sent Marker Response on port %d\n", |
1782 | port->actor_port_number); | |
1da177e4 LT |
1783 | } |
1784 | } | |
1785 | ||
1786 | /** | |
1787 | * ad_marker_response_received - handle receive of a marker response frame | |
1788 | * @marker: marker PDU received | |
1789 | * @port: the port we're looking at | |
1790 | * | |
1791 | * This function does nothing since we decided not to implement send and handle | |
1792 | * response for marker PDU's, in this stage, but only to respond to marker | |
1793 | * information. | |
1794 | */ | |
1c3f0b8e MD |
1795 | static void ad_marker_response_received(struct bond_marker *marker, |
1796 | struct port *port) | |
1da177e4 | 1797 | { |
128ea6c3 BD |
1798 | marker = NULL; /* just to satisfy the compiler */ |
1799 | port = NULL; /* just to satisfy the compiler */ | |
1da177e4 LT |
1800 | // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW |
1801 | } | |
1802 | ||
1da177e4 LT |
1803 | ////////////////////////////////////////////////////////////////////////////////////// |
1804 | // ================= AD exported functions to the main bonding code ================== | |
1805 | ////////////////////////////////////////////////////////////////////////////////////// | |
1806 | ||
1807 | // Check aggregators status in team every T seconds | |
1808 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1809 | ||
fd989c83 JV |
1810 | /* |
1811 | * bond_3ad_initiate_agg_selection(struct bonding *bond) | |
1812 | * | |
1813 | * Set the aggregation selection timer, to initiate an agg selection in | |
1814 | * the very near future. Called during first initialization, and during | |
1815 | * any down to up transitions of the bond. | |
1816 | */ | |
1817 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1818 | { | |
1819 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1820 | } |
1821 | ||
1da177e4 LT |
1822 | static u16 aggregator_identifier; |
1823 | ||
1824 | /** | |
1825 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1826 | * @bond: bonding struct to work on | |
1827 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1828 | * |
1829 | * Can be called only after the mac address of the bond is set. | |
1830 | */ | |
56d00c67 | 1831 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1832 | { |
815117ad | 1833 | /* check that the bond is not initialized yet */ |
1834 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
3a6d54c5 | 1835 | bond->dev->dev_addr)) { |
1da177e4 LT |
1836 | |
1837 | aggregator_identifier = 0; | |
1838 | ||
1da177e4 LT |
1839 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1840 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1841 | ||
1842 | // initialize how many times this module is called in one second(should be about every 100ms) | |
1843 | ad_ticks_per_sec = tick_resolution; | |
1844 | ||
fd989c83 JV |
1845 | bond_3ad_initiate_agg_selection(bond, |
1846 | AD_AGGREGATOR_SELECTION_TIMER * | |
1847 | ad_ticks_per_sec); | |
1da177e4 LT |
1848 | } |
1849 | } | |
1850 | ||
1851 | /** | |
1852 | * bond_3ad_bind_slave - initialize a slave's port | |
1853 | * @slave: slave struct to work on | |
1854 | * | |
1855 | * Returns: 0 on success | |
1856 | * < 0 on error | |
1857 | */ | |
359632e5 | 1858 | void bond_3ad_bind_slave(struct slave *slave) |
1da177e4 LT |
1859 | { |
1860 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1861 | struct port *port; | |
1862 | struct aggregator *aggregator; | |
1863 | ||
359632e5 | 1864 | /* check that the slave has not been initialized yet. */ |
1da177e4 LT |
1865 | if (SLAVE_AD_INFO(slave).port.slave != slave) { |
1866 | ||
359632e5 | 1867 | /* port initialization */ |
1da177e4 LT |
1868 | port = &(SLAVE_AD_INFO(slave).port); |
1869 | ||
bf0239a9 | 1870 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 | 1871 | |
e0809dbc | 1872 | __initialize_port_locks(slave); |
1da177e4 LT |
1873 | port->slave = slave; |
1874 | port->actor_port_number = SLAVE_AD_INFO(slave).id; | |
359632e5 | 1875 | /* key is determined according to the link speed, duplex and user key(which |
1876 | * is yet not supported) | |
1877 | * ------------------------------------------------------------ | |
1878 | * Port key : | User key | Speed |Duplex| | |
1879 | * ------------------------------------------------------------ | |
1880 | * 16 6 1 0 | |
1881 | */ | |
1882 | port->actor_admin_port_key = 0; /* initialize this parameter */ | |
1da177e4 LT |
1883 | port->actor_admin_port_key |= __get_duplex(port); |
1884 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1885 | port->actor_oper_port_key = port->actor_admin_port_key; | |
359632e5 | 1886 | /* if the port is not full duplex, then the port should be not lacp Enabled */ |
7bfc4753 | 1887 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1888 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
359632e5 | 1889 | /* actor system is the bond's system */ |
1da177e4 | 1890 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; |
359632e5 | 1891 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) */ |
1da177e4 LT |
1892 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
1893 | port->aggregator = NULL; | |
1894 | port->next_port_in_aggregator = NULL; | |
1895 | ||
1896 | __disable_port(port); | |
1da177e4 | 1897 | |
359632e5 | 1898 | /* aggregator initialization */ |
1da177e4 LT |
1899 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); |
1900 | ||
1901 | ad_initialize_agg(aggregator); | |
1902 | ||
1903 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
1904 | aggregator->aggregator_identifier = (++aggregator_identifier); | |
1905 | aggregator->slave = slave; | |
1906 | aggregator->is_active = 0; | |
1907 | aggregator->num_of_ports = 0; | |
1908 | } | |
1da177e4 LT |
1909 | } |
1910 | ||
1911 | /** | |
1912 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1913 | * @slave: slave struct to work on | |
1914 | * | |
1915 | * Search for the aggregator that is related to this port, remove the | |
1916 | * aggregator and assign another aggregator for other port related to it | |
1917 | * (if any), and remove the port. | |
1918 | */ | |
1919 | void bond_3ad_unbind_slave(struct slave *slave) | |
1920 | { | |
1921 | struct port *port, *prev_port, *temp_port; | |
1922 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1923 | int select_new_active_agg = 0; | |
0b088264 VF |
1924 | struct bonding *bond = slave->bond; |
1925 | struct slave *slave_iter; | |
1926 | struct list_head *iter; | |
a361c83c | 1927 | |
1da177e4 LT |
1928 | // find the aggregator related to this slave |
1929 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1930 | ||
1931 | // find the port related to this slave | |
1932 | port = &(SLAVE_AD_INFO(slave).port); | |
1933 | ||
1934 | // if slave is null, the whole port is not initialized | |
1935 | if (!port->slave) { | |
a4aee5c8 | 1936 | pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", |
471cb5a3 | 1937 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
1938 | return; |
1939 | } | |
1940 | ||
a4aee5c8 JP |
1941 | pr_debug("Unbinding Link Aggregation Group %d\n", |
1942 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1943 | |
1944 | /* Tell the partner that this port is not suitable for aggregation */ | |
1945 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1946 | __update_lacpdu_from_port(port); | |
1947 | ad_lacpdu_send(port); | |
1948 | ||
1949 | // check if this aggregator is occupied | |
1950 | if (aggregator->lag_ports) { | |
1951 | // check if there are other ports related to this aggregator except | |
1952 | // the port related to this slave(thats ensure us that there is a | |
1953 | // reason to search for new aggregator, and that we will find one | |
1954 | if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { | |
1955 | // find new aggregator for the related port(s) | |
0b088264 VF |
1956 | bond_for_each_slave(bond, slave_iter, iter) { |
1957 | new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); | |
fd589a8f | 1958 | // if the new aggregator is empty, or it is connected to our port only |
7bfc4753 BD |
1959 | if (!new_aggregator->lag_ports |
1960 | || ((new_aggregator->lag_ports == port) | |
1961 | && !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 1962 | break; |
1da177e4 | 1963 | } |
0b088264 VF |
1964 | if (!slave_iter) |
1965 | new_aggregator = NULL; | |
1da177e4 LT |
1966 | // if new aggregator found, copy the aggregator's parameters |
1967 | // and connect the related lag_ports to the new aggregator | |
1968 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
a4aee5c8 JP |
1969 | pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", |
1970 | aggregator->aggregator_identifier, | |
1971 | new_aggregator->aggregator_identifier); | |
1da177e4 LT |
1972 | |
1973 | if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { | |
a4aee5c8 | 1974 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 1975 | aggregator->slave->bond->dev->name); |
1da177e4 LT |
1976 | // select new active aggregator |
1977 | select_new_active_agg = 1; | |
1978 | } | |
1979 | ||
1980 | new_aggregator->is_individual = aggregator->is_individual; | |
1981 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
1982 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
1983 | new_aggregator->partner_system = aggregator->partner_system; | |
1984 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
1985 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
1986 | new_aggregator->receive_state = aggregator->receive_state; | |
1987 | new_aggregator->transmit_state = aggregator->transmit_state; | |
1988 | new_aggregator->lag_ports = aggregator->lag_ports; | |
1989 | new_aggregator->is_active = aggregator->is_active; | |
1990 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
1991 | ||
1992 | // update the information that is written on the ports about the aggregator | |
128ea6c3 BD |
1993 | for (temp_port = aggregator->lag_ports; temp_port; |
1994 | temp_port = temp_port->next_port_in_aggregator) { | |
1995 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
1996 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
1997 | } | |
1998 | ||
1999 | // clear the aggregator | |
2000 | ad_clear_agg(aggregator); | |
a361c83c | 2001 | |
7bfc4753 | 2002 | if (select_new_active_agg) |
1da177e4 | 2003 | ad_agg_selection_logic(__get_first_agg(port)); |
1da177e4 | 2004 | } else { |
a4aee5c8 | 2005 | pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", |
471cb5a3 | 2006 | slave->bond->dev->name); |
1da177e4 LT |
2007 | } |
2008 | } else { // in case that the only port related to this aggregator is the one we want to remove | |
2009 | select_new_active_agg = aggregator->is_active; | |
2010 | // clear the aggregator | |
2011 | ad_clear_agg(aggregator); | |
2012 | if (select_new_active_agg) { | |
a4aee5c8 | 2013 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 2014 | slave->bond->dev->name); |
1da177e4 | 2015 | // select new active aggregator |
74684493 VF |
2016 | temp_aggregator = __get_first_agg(port); |
2017 | if (temp_aggregator) | |
2018 | ad_agg_selection_logic(temp_aggregator); | |
1da177e4 LT |
2019 | } |
2020 | } | |
2021 | } | |
2022 | ||
5a03cdb7 | 2023 | pr_debug("Unbinding port %d\n", port->actor_port_number); |
1da177e4 | 2024 | // find the aggregator that this port is connected to |
0b088264 VF |
2025 | bond_for_each_slave(bond, slave_iter, iter) { |
2026 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); | |
1da177e4 LT |
2027 | prev_port = NULL; |
2028 | // search the port in the aggregator's related ports | |
128ea6c3 BD |
2029 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2030 | prev_port = temp_port, | |
2031 | temp_port = temp_port->next_port_in_aggregator) { | |
1da177e4 | 2032 | if (temp_port == port) { // the aggregator found - detach the port from this aggregator |
7bfc4753 | 2033 | if (prev_port) |
1da177e4 | 2034 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2035 | else |
1da177e4 | 2036 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2037 | temp_aggregator->num_of_ports--; |
128ea6c3 | 2038 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 LT |
2039 | select_new_active_agg = temp_aggregator->is_active; |
2040 | // clear the aggregator | |
2041 | ad_clear_agg(temp_aggregator); | |
2042 | if (select_new_active_agg) { | |
a4aee5c8 | 2043 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 2044 | slave->bond->dev->name); |
1da177e4 LT |
2045 | // select new active aggregator |
2046 | ad_agg_selection_logic(__get_first_agg(port)); | |
2047 | } | |
2048 | } | |
2049 | break; | |
2050 | } | |
2051 | } | |
2052 | } | |
128ea6c3 | 2053 | port->slave = NULL; |
1da177e4 LT |
2054 | } |
2055 | ||
2056 | /** | |
2057 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2058 | * @bond: bonding struct to work on | |
2059 | * | |
2060 | * The state machine handling concept in this module is to check every tick | |
2061 | * which state machine should operate any function. The execution order is | |
2062 | * round robin, so when we have an interaction between state machines, the | |
2063 | * reply of one to each other might be delayed until next tick. | |
2064 | * | |
2065 | * This function also complete the initialization when the agg_select_timer | |
2066 | * times out, and it selects an aggregator for the ports that are yet not | |
2067 | * related to any aggregator, and selects the active aggregator for a bond. | |
2068 | */ | |
1b76b316 | 2069 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2070 | { |
1b76b316 JV |
2071 | struct bonding *bond = container_of(work, struct bonding, |
2072 | ad_work.work); | |
1da177e4 | 2073 | struct aggregator *aggregator; |
3c4c88a1 VF |
2074 | struct list_head *iter; |
2075 | struct slave *slave; | |
2076 | struct port *port; | |
1da177e4 | 2077 | |
1f2cd845 | 2078 | read_lock(&bond->lock); |
be79bd04 | 2079 | rcu_read_lock(); |
1f2cd845 | 2080 | |
be79bd04 | 2081 | /* check if there are any slaves */ |
0965a1f3 | 2082 | if (!bond_has_slaves(bond)) |
1da177e4 | 2083 | goto re_arm; |
1da177e4 | 2084 | |
be79bd04 | 2085 | /* check if agg_select_timer timer after initialize is timed out */ |
1da177e4 | 2086 | if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { |
be79bd04 | 2087 | slave = bond_first_slave_rcu(bond); |
fe9323da VF |
2088 | port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL; |
2089 | ||
be79bd04 | 2090 | /* select the active aggregator for the bond */ |
fe9323da | 2091 | if (port) { |
1da177e4 | 2092 | if (!port->slave) { |
a4aee5c8 JP |
2093 | pr_warning("%s: Warning: bond's first port is uninitialized\n", |
2094 | bond->dev->name); | |
1da177e4 LT |
2095 | goto re_arm; |
2096 | } | |
2097 | ||
2098 | aggregator = __get_first_agg(port); | |
2099 | ad_agg_selection_logic(aggregator); | |
2100 | } | |
f0c76d61 | 2101 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2102 | } |
2103 | ||
be79bd04 | 2104 | /* for each port run the state machines */ |
2105 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3c4c88a1 | 2106 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 | 2107 | if (!port->slave) { |
a4aee5c8 JP |
2108 | pr_warning("%s: Warning: Found an uninitialized port\n", |
2109 | bond->dev->name); | |
1da177e4 LT |
2110 | goto re_arm; |
2111 | } | |
2112 | ||
16d79d7d NC |
2113 | /* Lock around state machines to protect data accessed |
2114 | * by all (e.g., port->sm_vars). ad_rx_machine may run | |
2115 | * concurrently due to incoming LACPDU. | |
2116 | */ | |
9ac3524a | 2117 | __get_state_machine_lock(port); |
16d79d7d | 2118 | |
1da177e4 LT |
2119 | ad_rx_machine(NULL, port); |
2120 | ad_periodic_machine(port); | |
2121 | ad_port_selection_logic(port); | |
2122 | ad_mux_machine(port); | |
2123 | ad_tx_machine(port); | |
2124 | ||
be79bd04 | 2125 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2126 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2127 | port->sm_vars &= ~AD_PORT_BEGIN; |
16d79d7d | 2128 | |
9ac3524a | 2129 | __release_state_machine_lock(port); |
1da177e4 LT |
2130 | } |
2131 | ||
2132 | re_arm: | |
be79bd04 | 2133 | rcu_read_unlock(); |
1f2cd845 | 2134 | read_unlock(&bond->lock); |
be79bd04 | 2135 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2136 | } |
2137 | ||
2138 | /** | |
2139 | * bond_3ad_rx_indication - handle a received frame | |
2140 | * @lacpdu: received lacpdu | |
2141 | * @slave: slave struct to work on | |
2142 | * @length: length of the data received | |
2143 | * | |
2144 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2145 | * received frames (loopback). Since only the payload is given to this | |
2146 | * function, it check for loopback. | |
2147 | */ | |
13a8e0c8 | 2148 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) |
1da177e4 LT |
2149 | { |
2150 | struct port *port; | |
13a8e0c8 | 2151 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2152 | |
2153 | if (length >= sizeof(struct lacpdu)) { | |
2154 | ||
2155 | port = &(SLAVE_AD_INFO(slave).port); | |
2156 | ||
2157 | if (!port->slave) { | |
a4aee5c8 | 2158 | pr_warning("%s: Warning: port of slave %s is uninitialized\n", |
471cb5a3 | 2159 | slave->dev->name, slave->bond->dev->name); |
13a8e0c8 | 2160 | return ret; |
1da177e4 LT |
2161 | } |
2162 | ||
2163 | switch (lacpdu->subtype) { | |
2164 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2165 | ret = RX_HANDLER_CONSUMED; |
a4aee5c8 JP |
2166 | pr_debug("Received LACPDU on port %d\n", |
2167 | port->actor_port_number); | |
16d79d7d | 2168 | /* Protect against concurrent state machines */ |
9ac3524a | 2169 | __get_state_machine_lock(port); |
1da177e4 | 2170 | ad_rx_machine(lacpdu, port); |
9ac3524a | 2171 | __release_state_machine_lock(port); |
1da177e4 LT |
2172 | break; |
2173 | ||
2174 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2175 | ret = RX_HANDLER_CONSUMED; |
1da177e4 LT |
2176 | // No need to convert fields to Little Endian since we don't use the marker's fields. |
2177 | ||
1c3f0b8e | 2178 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2179 | case AD_MARKER_INFORMATION_SUBTYPE: |
a4aee5c8 JP |
2180 | pr_debug("Received Marker Information on port %d\n", |
2181 | port->actor_port_number); | |
1c3f0b8e | 2182 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2183 | break; |
2184 | ||
2185 | case AD_MARKER_RESPONSE_SUBTYPE: | |
a4aee5c8 JP |
2186 | pr_debug("Received Marker Response on port %d\n", |
2187 | port->actor_port_number); | |
1c3f0b8e | 2188 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2189 | break; |
2190 | ||
2191 | default: | |
a4aee5c8 JP |
2192 | pr_debug("Received an unknown Marker subtype on slot %d\n", |
2193 | port->actor_port_number); | |
1da177e4 LT |
2194 | } |
2195 | } | |
2196 | } | |
13a8e0c8 | 2197 | return ret; |
1da177e4 LT |
2198 | } |
2199 | ||
2200 | /** | |
2201 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2202 | * @slave: slave struct to work on | |
2203 | * | |
2204 | * Handle reselection of aggregator (if needed) for this port. | |
2205 | */ | |
2206 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2207 | { | |
2208 | struct port *port; | |
2209 | ||
2210 | port = &(SLAVE_AD_INFO(slave).port); | |
2211 | ||
71a06c59 | 2212 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2213 | if (!port->slave) { |
a4aee5c8 | 2214 | pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", |
471cb5a3 | 2215 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2216 | return; |
2217 | } | |
2218 | ||
71a06c59 | 2219 | __get_state_machine_lock(port); |
2220 | ||
1da177e4 | 2221 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2222 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2223 | (__get_link_speed(port) << 1); | |
5a03cdb7 | 2224 | pr_debug("Port %d changed speed\n", port->actor_port_number); |
71a06c59 | 2225 | /* there is no need to reselect a new aggregator, just signal the |
2226 | * state machines to reinitialize | |
2227 | */ | |
1da177e4 | 2228 | port->sm_vars |= AD_PORT_BEGIN; |
71a06c59 | 2229 | |
2230 | __release_state_machine_lock(port); | |
1da177e4 LT |
2231 | } |
2232 | ||
2233 | /** | |
2234 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2235 | * @slave: slave struct to work on | |
2236 | * | |
2237 | * Handle reselection of aggregator (if needed) for this port. | |
2238 | */ | |
2239 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2240 | { | |
2241 | struct port *port; | |
2242 | ||
128ea6c3 | 2243 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 | 2244 | |
bca44a73 | 2245 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2246 | if (!port->slave) { |
a4aee5c8 | 2247 | pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", |
471cb5a3 | 2248 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2249 | return; |
2250 | } | |
2251 | ||
bca44a73 | 2252 | __get_state_machine_lock(port); |
2253 | ||
1da177e4 | 2254 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2255 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2256 | __get_duplex(port); | |
5a03cdb7 | 2257 | pr_debug("Port %d changed duplex\n", port->actor_port_number); |
bca44a73 | 2258 | /* there is no need to reselect a new aggregator, just signal the |
2259 | * state machines to reinitialize | |
2260 | */ | |
1da177e4 | 2261 | port->sm_vars |= AD_PORT_BEGIN; |
bca44a73 | 2262 | |
2263 | __release_state_machine_lock(port); | |
1da177e4 LT |
2264 | } |
2265 | ||
2266 | /** | |
2267 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2268 | * @slave: slave struct to work on | |
2269 | * @status: whether the link is now up or down | |
2270 | * | |
2271 | * Handle reselection of aggregator (if needed) for this port. | |
2272 | */ | |
2273 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2274 | { | |
2275 | struct port *port; | |
2276 | ||
2277 | port = &(SLAVE_AD_INFO(slave).port); | |
2278 | ||
108db736 | 2279 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2280 | if (!port->slave) { |
a4aee5c8 | 2281 | pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", |
471cb5a3 | 2282 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2283 | return; |
2284 | } | |
2285 | ||
108db736 | 2286 | __get_state_machine_lock(port); |
2287 | /* on link down we are zeroing duplex and speed since | |
2288 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2289 | * instead of N/A(duplex) / 0(speed). | |
2290 | * | |
2291 | * on link up we are forcing recheck on the duplex and speed since | |
2292 | * some of he adaptors(ce1000.lan) report. | |
2293 | */ | |
1da177e4 | 2294 | if (link == BOND_LINK_UP) { |
f48127b6 | 2295 | port->is_enabled = true; |
1da177e4 | 2296 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2297 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2298 | __get_duplex(port); | |
1da177e4 | 2299 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2300 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2301 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2302 | } else { |
2303 | /* link has failed */ | |
f48127b6 | 2304 | port->is_enabled = false; |
1da177e4 | 2305 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2306 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2307 | ~AD_SPEED_KEY_BITS); | |
1da177e4 | 2308 | } |
108db736 | 2309 | pr_debug("Port %d changed link status to %s", |
2310 | port->actor_port_number, | |
2311 | (link == BOND_LINK_UP) ? "UP" : "DOWN"); | |
2312 | /* there is no need to reselect a new aggregator, just signal the | |
2313 | * state machines to reinitialize | |
2314 | */ | |
1da177e4 | 2315 | port->sm_vars |= AD_PORT_BEGIN; |
108db736 | 2316 | |
2317 | __release_state_machine_lock(port); | |
1da177e4 LT |
2318 | } |
2319 | ||
ff59c456 | 2320 | /* |
a361c83c | 2321 | * set link state for bonding master: if we have an active |
ff59c456 JV |
2322 | * aggregator, we're up, if not, we're down. Presumes that we cannot |
2323 | * have an active aggregator if there are no slaves with link up. | |
2324 | * | |
031ae4de JV |
2325 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2326 | * | |
ff59c456 JV |
2327 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2328 | * change, nonzero if it does. | |
2329 | */ | |
2330 | int bond_3ad_set_carrier(struct bonding *bond) | |
2331 | { | |
655f8919 | 2332 | struct aggregator *active; |
dec1e90e | 2333 | struct slave *first_slave; |
655f8919 | 2334 | |
be79bd04 | 2335 | rcu_read_lock(); |
2336 | first_slave = bond_first_slave_rcu(bond); | |
2337 | rcu_read_unlock(); | |
dec1e90e | 2338 | if (!first_slave) |
2339 | return 0; | |
2340 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator)); | |
655f8919 | 2341 | if (active) { |
2342 | /* are enough slaves available to consider link up? */ | |
2343 | if (active->num_of_ports < bond->params.min_links) { | |
2344 | if (netif_carrier_ok(bond->dev)) { | |
2345 | netif_carrier_off(bond->dev); | |
2346 | return 1; | |
2347 | } | |
2348 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 JV |
2349 | netif_carrier_on(bond->dev); |
2350 | return 1; | |
2351 | } | |
2352 | return 0; | |
2353 | } | |
2354 | ||
2355 | if (netif_carrier_ok(bond->dev)) { | |
2356 | netif_carrier_off(bond->dev); | |
2357 | return 1; | |
2358 | } | |
2359 | return 0; | |
2360 | } | |
2361 | ||
1da177e4 | 2362 | /** |
318debd8 | 2363 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2364 | * @bond: bonding struct to work on |
2365 | * @ad_info: ad_info struct to fill with the bond's info | |
2366 | * | |
2367 | * Returns: 0 on success | |
2368 | * < 0 on error | |
2369 | */ | |
318debd8 | 2370 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2371 | struct ad_info *ad_info) | |
1da177e4 LT |
2372 | { |
2373 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2374 | struct list_head *iter; |
2375 | struct slave *slave; | |
1da177e4 LT |
2376 | struct port *port; |
2377 | ||
47e91f56 | 2378 | bond_for_each_slave_rcu(bond, slave, iter) { |
3c4c88a1 | 2379 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 LT |
2380 | if (port->aggregator && port->aggregator->is_active) { |
2381 | aggregator = port->aggregator; | |
2382 | break; | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | if (aggregator) { | |
2387 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2388 | ad_info->ports = aggregator->num_of_ports; | |
2389 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2390 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2391 | memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); | |
2392 | return 0; | |
2393 | } | |
2394 | ||
2395 | return -1; | |
2396 | } | |
2397 | ||
318debd8 | 2398 | /* Wrapper used to hold bond->lock so no slave manipulation can occur */ |
2399 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2400 | { | |
2401 | int ret; | |
2402 | ||
47e91f56 | 2403 | rcu_read_lock(); |
318debd8 | 2404 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2405 | rcu_read_unlock(); |
318debd8 | 2406 | |
2407 | return ret; | |
2408 | } | |
2409 | ||
1da177e4 LT |
2410 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) |
2411 | { | |
454d7c9b | 2412 | struct bonding *bond = netdev_priv(dev); |
c33d7887 VF |
2413 | struct slave *slave, *first_ok_slave; |
2414 | struct aggregator *agg; | |
2415 | struct ad_info ad_info; | |
9caff1e7 | 2416 | struct list_head *iter; |
1da177e4 | 2417 | int slaves_in_agg; |
c33d7887 | 2418 | int slave_agg_no; |
c33d7887 | 2419 | int agg_id; |
1da177e4 | 2420 | |
318debd8 | 2421 | if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { |
2422 | pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n", | |
a4aee5c8 | 2423 | dev->name); |
a742e1f5 | 2424 | goto err_free; |
1da177e4 LT |
2425 | } |
2426 | ||
2427 | slaves_in_agg = ad_info.ports; | |
2428 | agg_id = ad_info.aggregator_id; | |
2429 | ||
2430 | if (slaves_in_agg == 0) { | |
a4aee5c8 | 2431 | pr_debug("%s: Error: active aggregator is empty\n", dev->name); |
a742e1f5 | 2432 | goto err_free; |
1da177e4 LT |
2433 | } |
2434 | ||
32819dc1 | 2435 | slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg); |
c33d7887 | 2436 | first_ok_slave = NULL; |
1da177e4 | 2437 | |
47e91f56 | 2438 | bond_for_each_slave_rcu(bond, slave, iter) { |
c33d7887 VF |
2439 | agg = SLAVE_AD_INFO(slave).port.aggregator; |
2440 | if (!agg || agg->aggregator_identifier != agg_id) | |
2441 | continue; | |
1da177e4 | 2442 | |
c33d7887 VF |
2443 | if (slave_agg_no >= 0) { |
2444 | if (!first_ok_slave && SLAVE_IS_OK(slave)) | |
2445 | first_ok_slave = slave; | |
1da177e4 | 2446 | slave_agg_no--; |
c33d7887 VF |
2447 | continue; |
2448 | } | |
2449 | ||
2450 | if (SLAVE_IS_OK(slave)) { | |
a742e1f5 | 2451 | bond_dev_queue_xmit(bond, skb, slave->dev); |
c33d7887 | 2452 | goto out; |
1da177e4 LT |
2453 | } |
2454 | } | |
2455 | ||
2456 | if (slave_agg_no >= 0) { | |
a4aee5c8 JP |
2457 | pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", |
2458 | dev->name, agg_id); | |
a742e1f5 | 2459 | goto err_free; |
1da177e4 LT |
2460 | } |
2461 | ||
c33d7887 VF |
2462 | /* we couldn't find any suitable slave after the agg_no, so use the |
2463 | * first suitable found, if found. */ | |
2464 | if (first_ok_slave) | |
a742e1f5 | 2465 | bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); |
2466 | else | |
2467 | goto err_free; | |
1da177e4 LT |
2468 | |
2469 | out: | |
ec634fe3 | 2470 | return NETDEV_TX_OK; |
a742e1f5 | 2471 | err_free: |
2472 | /* no suitable interface, frame not sent */ | |
2473 | kfree_skb(skb); | |
2474 | goto out; | |
1da177e4 LT |
2475 | } |
2476 | ||
de063b70 ED |
2477 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2478 | struct slave *slave) | |
1da177e4 | 2479 | { |
13a8e0c8 | 2480 | int ret = RX_HANDLER_ANOTHER; |
de063b70 ED |
2481 | struct lacpdu *lacpdu, _lacpdu; |
2482 | ||
3aba891d | 2483 | if (skb->protocol != PKT_TYPE_LACPDU) |
13a8e0c8 | 2484 | return ret; |
b3053251 | 2485 | |
de063b70 ED |
2486 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2487 | if (!lacpdu) | |
13a8e0c8 | 2488 | return ret; |
ab12811c | 2489 | |
1da177e4 | 2490 | read_lock(&bond->lock); |
de063b70 | 2491 | ret = bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2492 | read_unlock(&bond->lock); |
13a8e0c8 | 2493 | return ret; |
1da177e4 | 2494 | } |
ba824a8b PP |
2495 | |
2496 | /* | |
2497 | * When modify lacp_rate parameter via sysfs, | |
2498 | * update actor_oper_port_state of each port. | |
2499 | * | |
2500 | * Hold slave->state_machine_lock, | |
2501 | * so we can modify port->actor_oper_port_state, | |
2502 | * no matter bond is up or down. | |
2503 | */ | |
2504 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2505 | { | |
ba824a8b | 2506 | struct port *port = NULL; |
9caff1e7 | 2507 | struct list_head *iter; |
c509316b | 2508 | struct slave *slave; |
ba824a8b PP |
2509 | int lacp_fast; |
2510 | ||
ba824a8b | 2511 | lacp_fast = bond->params.lacp_fast; |
9caff1e7 | 2512 | bond_for_each_slave(bond, slave, iter) { |
ba824a8b PP |
2513 | port = &(SLAVE_AD_INFO(slave).port); |
2514 | __get_state_machine_lock(port); | |
2515 | if (lacp_fast) | |
2516 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2517 | else | |
2518 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
2519 | __release_state_machine_lock(port); | |
2520 | } | |
ba824a8b | 2521 | } |