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1da177e4 LT |
1 | /* |
2 | * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; either version 2 of the License, or (at your option) | |
7 | * any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 | |
16 | * Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
1da177e4 LT |
21 | */ |
22 | ||
1da177e4 LT |
23 | #include <linux/skbuff.h> |
24 | #include <linux/if_ether.h> | |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/ethtool.h> | |
fd989c83 | 28 | #include <linux/etherdevice.h> |
1da177e4 LT |
29 | #include <linux/if_bonding.h> |
30 | #include <linux/pkt_sched.h> | |
e730c155 | 31 | #include <net/net_namespace.h> |
1ef8019b DM |
32 | #include <net/bonding.h> |
33 | #include <net/bond_3ad.h> | |
1da177e4 | 34 | |
3bf2d28a | 35 | /* General definitions */ |
1da177e4 LT |
36 | #define AD_SHORT_TIMEOUT 1 |
37 | #define AD_LONG_TIMEOUT 0 | |
38 | #define AD_STANDBY 0x2 | |
39 | #define AD_MAX_TX_IN_SECOND 3 | |
40 | #define AD_COLLECTOR_MAX_DELAY 0 | |
41 | ||
3bf2d28a | 42 | /* Timer definitions (43.4.4 in the 802.3ad standard) */ |
1da177e4 LT |
43 | #define AD_FAST_PERIODIC_TIME 1 |
44 | #define AD_SLOW_PERIODIC_TIME 30 | |
45 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
46 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
47 | #define AD_CHURN_DETECTION_TIME 60 | |
48 | #define AD_AGGREGATE_WAIT_TIME 2 | |
49 | ||
3bf2d28a | 50 | /* Port state definitions (43.4.2.2 in the 802.3ad standard) */ |
1da177e4 LT |
51 | #define AD_STATE_LACP_ACTIVITY 0x1 |
52 | #define AD_STATE_LACP_TIMEOUT 0x2 | |
53 | #define AD_STATE_AGGREGATION 0x4 | |
54 | #define AD_STATE_SYNCHRONIZATION 0x8 | |
55 | #define AD_STATE_COLLECTING 0x10 | |
56 | #define AD_STATE_DISTRIBUTING 0x20 | |
57 | #define AD_STATE_DEFAULTED 0x40 | |
58 | #define AD_STATE_EXPIRED 0x80 | |
59 | ||
3bf2d28a VF |
60 | /* Port Variables definitions used by the State Machines (43.4.7 in the |
61 | * 802.3ad standard) | |
62 | */ | |
1da177e4 LT |
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 | |
ef015d72 | 73 | #define AD_PORT_CHURNED (AD_PORT_ACTOR_CHURN | AD_PORT_PARTNER_CHURN) |
1da177e4 | 74 | |
3bf2d28a VF |
75 | /* Port Key definitions |
76 | * key is determined according to the link speed, duplex and | |
77 | * user key (which is yet not supported) | |
78 | * -------------------------------------------------------------- | |
79 | * Port key : | User key | Speed | Duplex | | |
80 | * -------------------------------------------------------------- | |
81 | * 16 6 1 0 | |
82 | */ | |
cb8dda90 JX |
83 | #define AD_DUPLEX_KEY_MASKS 0x1 |
84 | #define AD_SPEED_KEY_MASKS 0x3E | |
85 | #define AD_USER_KEY_MASKS 0xFFC0 | |
86 | ||
87 | enum ad_link_speed_type { | |
88 | AD_LINK_SPEED_1MBPS = 1, | |
89 | AD_LINK_SPEED_10MBPS, | |
90 | AD_LINK_SPEED_100MBPS, | |
91 | AD_LINK_SPEED_1000MBPS, | |
424c3232 JX |
92 | AD_LINK_SPEED_2500MBPS, |
93 | AD_LINK_SPEED_10000MBPS, | |
94 | AD_LINK_SPEED_20000MBPS, | |
95 | AD_LINK_SPEED_40000MBPS, | |
96 | AD_LINK_SPEED_56000MBPS | |
cb8dda90 | 97 | }; |
1da177e4 | 98 | |
815117ad | 99 | /* compare MAC addresses */ |
100 | #define MAC_ADDRESS_EQUAL(A, B) \ | |
101 | ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) | |
1da177e4 | 102 | |
128ea6c3 | 103 | static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; |
1da177e4 LT |
104 | static u16 ad_ticks_per_sec; |
105 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
106 | ||
e4ac4320 HE |
107 | static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
108 | ||
3bf2d28a | 109 | /* ================= main 802.3ad protocol functions ================== */ |
1da177e4 | 110 | static int ad_lacpdu_send(struct port *port); |
1c3f0b8e | 111 | static int ad_marker_send(struct port *port, struct bond_marker *marker); |
ee637714 | 112 | static void ad_mux_machine(struct port *port, bool *update_slave_arr); |
1da177e4 LT |
113 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); |
114 | static void ad_tx_machine(struct port *port); | |
115 | static void ad_periodic_machine(struct port *port); | |
ee637714 MB |
116 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); |
117 | static void ad_agg_selection_logic(struct aggregator *aggregator, | |
118 | bool *update_slave_arr); | |
1da177e4 LT |
119 | static void ad_clear_agg(struct aggregator *aggregator); |
120 | static void ad_initialize_agg(struct aggregator *aggregator); | |
121 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
ee637714 MB |
122 | static void ad_enable_collecting_distributing(struct port *port, |
123 | bool *update_slave_arr); | |
124 | static void ad_disable_collecting_distributing(struct port *port, | |
125 | bool *update_slave_arr); | |
3bf2d28a VF |
126 | static void ad_marker_info_received(struct bond_marker *marker_info, |
127 | struct port *port); | |
128 | static void ad_marker_response_received(struct bond_marker *marker, | |
129 | struct port *port); | |
1da177e4 LT |
130 | |
131 | ||
3bf2d28a | 132 | /* ================= api to bonding and kernel code ================== */ |
1da177e4 LT |
133 | |
134 | /** | |
135 | * __get_bond_by_port - get the port's bonding struct | |
136 | * @port: the port we're looking at | |
137 | * | |
138 | * Return @port's bonding struct, or %NULL if it can't be found. | |
139 | */ | |
140 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
141 | { | |
7bfc4753 | 142 | if (port->slave == NULL) |
1da177e4 | 143 | return NULL; |
1da177e4 LT |
144 | |
145 | return bond_get_bond_by_slave(port->slave); | |
146 | } | |
147 | ||
1da177e4 LT |
148 | /** |
149 | * __get_first_agg - get the first aggregator in the bond | |
150 | * @bond: the bond we're looking at | |
151 | * | |
152 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
153 | * found. | |
768b9549 | 154 | * The caller must hold RCU or RTNL lock. |
1da177e4 LT |
155 | */ |
156 | static inline struct aggregator *__get_first_agg(struct port *port) | |
157 | { | |
158 | struct bonding *bond = __get_bond_by_port(port); | |
dec1e90e | 159 | struct slave *first_slave; |
768b9549 | 160 | struct aggregator *agg; |
1da177e4 | 161 | |
be79bd04 | 162 | /* If there's no bond for this port, or bond has no slaves */ |
dec1e90e | 163 | if (bond == NULL) |
1da177e4 | 164 | return NULL; |
3bf2d28a | 165 | |
be79bd04 | 166 | rcu_read_lock(); |
167 | first_slave = bond_first_slave_rcu(bond); | |
3fdddd85 | 168 | agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; |
be79bd04 | 169 | rcu_read_unlock(); |
3bf2d28a | 170 | |
768b9549 | 171 | return agg; |
1da177e4 LT |
172 | } |
173 | ||
3bf2d28a VF |
174 | /** |
175 | * __agg_has_partner - see if we have a partner | |
176 | * @agg: the agregator we're looking at | |
fd989c83 JV |
177 | * |
178 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
3bf2d28a | 179 | * address for the partner). Return 0 if not. |
fd989c83 JV |
180 | */ |
181 | static inline int __agg_has_partner(struct aggregator *agg) | |
182 | { | |
183 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
184 | } | |
185 | ||
1da177e4 LT |
186 | /** |
187 | * __disable_port - disable the port's slave | |
188 | * @port: the port we're looking at | |
1da177e4 LT |
189 | */ |
190 | static inline void __disable_port(struct port *port) | |
191 | { | |
5e5b0665 | 192 | bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
193 | } |
194 | ||
195 | /** | |
196 | * __enable_port - enable the port's slave, if it's up | |
197 | * @port: the port we're looking at | |
1da177e4 LT |
198 | */ |
199 | static inline void __enable_port(struct port *port) | |
200 | { | |
201 | struct slave *slave = port->slave; | |
202 | ||
b6adc610 | 203 | if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) |
5e5b0665 | 204 | bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
205 | } |
206 | ||
207 | /** | |
208 | * __port_is_enabled - check if the port's slave is in active state | |
209 | * @port: the port we're looking at | |
1da177e4 LT |
210 | */ |
211 | static inline int __port_is_enabled(struct port *port) | |
212 | { | |
e30bc066 | 213 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
214 | } |
215 | ||
216 | /** | |
217 | * __get_agg_selection_mode - get the aggregator selection mode | |
218 | * @port: the port we're looking at | |
219 | * | |
fd989c83 | 220 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
221 | */ |
222 | static inline u32 __get_agg_selection_mode(struct port *port) | |
223 | { | |
224 | struct bonding *bond = __get_bond_by_port(port); | |
225 | ||
7bfc4753 | 226 | if (bond == NULL) |
fd989c83 | 227 | return BOND_AD_STABLE; |
1da177e4 | 228 | |
1a14fbcb | 229 | return bond->params.ad_select; |
1da177e4 LT |
230 | } |
231 | ||
232 | /** | |
233 | * __check_agg_selection_timer - check if the selection timer has expired | |
234 | * @port: the port we're looking at | |
1da177e4 LT |
235 | */ |
236 | static inline int __check_agg_selection_timer(struct port *port) | |
237 | { | |
238 | struct bonding *bond = __get_bond_by_port(port); | |
239 | ||
7bfc4753 | 240 | if (bond == NULL) |
1da177e4 | 241 | return 0; |
1da177e4 LT |
242 | |
243 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
244 | } | |
245 | ||
1da177e4 LT |
246 | /** |
247 | * __get_link_speed - get a port's speed | |
248 | * @port: the port we're looking at | |
249 | * | |
cb8dda90 | 250 | * Return @port's speed in 802.3ad enum format. i.e. one of: |
1da177e4 | 251 | * 0, |
cb8dda90 JX |
252 | * %AD_LINK_SPEED_10MBPS, |
253 | * %AD_LINK_SPEED_100MBPS, | |
254 | * %AD_LINK_SPEED_1000MBPS, | |
424c3232 | 255 | * %AD_LINK_SPEED_2500MBPS, |
cb8dda90 | 256 | * %AD_LINK_SPEED_10000MBPS |
424c3232 JX |
257 | * %AD_LINK_SPEED_20000MBPS |
258 | * %AD_LINK_SPEED_40000MBPS | |
259 | * %AD_LINK_SPEED_56000MBPS | |
1da177e4 LT |
260 | */ |
261 | static u16 __get_link_speed(struct port *port) | |
262 | { | |
263 | struct slave *slave = port->slave; | |
264 | u16 speed; | |
265 | ||
3bf2d28a VF |
266 | /* this if covers only a special case: when the configuration starts |
267 | * with link down, it sets the speed to 0. | |
268 | * This is done in spite of the fact that the e100 driver reports 0 | |
269 | * to be compatible with MVT in the future. | |
270 | */ | |
7bfc4753 | 271 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 272 | speed = 0; |
7bfc4753 | 273 | else { |
1da177e4 LT |
274 | switch (slave->speed) { |
275 | case SPEED_10: | |
cb8dda90 | 276 | speed = AD_LINK_SPEED_10MBPS; |
1da177e4 LT |
277 | break; |
278 | ||
279 | case SPEED_100: | |
cb8dda90 | 280 | speed = AD_LINK_SPEED_100MBPS; |
1da177e4 LT |
281 | break; |
282 | ||
283 | case SPEED_1000: | |
cb8dda90 | 284 | speed = AD_LINK_SPEED_1000MBPS; |
1da177e4 LT |
285 | break; |
286 | ||
424c3232 JX |
287 | case SPEED_2500: |
288 | speed = AD_LINK_SPEED_2500MBPS; | |
289 | break; | |
290 | ||
94dbffd5 | 291 | case SPEED_10000: |
cb8dda90 | 292 | speed = AD_LINK_SPEED_10000MBPS; |
94dbffd5 JV |
293 | break; |
294 | ||
424c3232 JX |
295 | case SPEED_20000: |
296 | speed = AD_LINK_SPEED_20000MBPS; | |
297 | break; | |
298 | ||
299 | case SPEED_40000: | |
300 | speed = AD_LINK_SPEED_40000MBPS; | |
301 | break; | |
302 | ||
303 | case SPEED_56000: | |
304 | speed = AD_LINK_SPEED_56000MBPS; | |
305 | break; | |
306 | ||
1da177e4 | 307 | default: |
3bf2d28a VF |
308 | /* unknown speed value from ethtool. shouldn't happen */ |
309 | speed = 0; | |
1da177e4 LT |
310 | break; |
311 | } | |
312 | } | |
313 | ||
d4471f5e VF |
314 | netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", |
315 | port->actor_port_number, speed); | |
1da177e4 LT |
316 | return speed; |
317 | } | |
318 | ||
319 | /** | |
320 | * __get_duplex - get a port's duplex | |
321 | * @port: the port we're looking at | |
322 | * | |
323 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
324 | * 0x01 if in full duplex | |
325 | * 0x00 otherwise | |
326 | */ | |
327 | static u8 __get_duplex(struct port *port) | |
328 | { | |
329 | struct slave *slave = port->slave; | |
1da177e4 LT |
330 | u8 retval; |
331 | ||
3bf2d28a VF |
332 | /* handling a special case: when the configuration starts with |
333 | * link down, it sets the duplex to 0. | |
334 | */ | |
547942ca | 335 | if (slave->link != BOND_LINK_UP) { |
128ea6c3 | 336 | retval = 0x0; |
547942ca | 337 | } else { |
1da177e4 LT |
338 | switch (slave->duplex) { |
339 | case DUPLEX_FULL: | |
128ea6c3 | 340 | retval = 0x1; |
d4471f5e VF |
341 | netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", |
342 | port->actor_port_number); | |
1da177e4 LT |
343 | break; |
344 | case DUPLEX_HALF: | |
345 | default: | |
128ea6c3 | 346 | retval = 0x0; |
d4471f5e VF |
347 | netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", |
348 | port->actor_port_number); | |
1da177e4 LT |
349 | break; |
350 | } | |
351 | } | |
352 | return retval; | |
353 | } | |
354 | ||
3bf2d28a | 355 | /* Conversions */ |
1da177e4 LT |
356 | |
357 | /** | |
358 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
359 | * @timer_type: which timer to operate | |
360 | * @par: timer parameter. see below | |
361 | * | |
362 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
363 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
3bf2d28a | 364 | * %SLOW_PERIODIC_TIME. |
1da177e4 LT |
365 | */ |
366 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
367 | { | |
128ea6c3 | 368 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
369 | |
370 | switch (timer_type) { | |
3bf2d28a | 371 | case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ |
7bfc4753 | 372 | if (par) |
3bf2d28a | 373 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); |
7bfc4753 | 374 | else |
3bf2d28a | 375 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); |
1da177e4 | 376 | break; |
3bf2d28a | 377 | case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ |
1da177e4 LT |
378 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
379 | break; | |
3bf2d28a VF |
380 | case AD_PERIODIC_TIMER: /* for periodic machine */ |
381 | retval = (par*ad_ticks_per_sec); /* long timeout */ | |
1da177e4 | 382 | break; |
3bf2d28a | 383 | case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ |
1da177e4 LT |
384 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
385 | break; | |
3bf2d28a | 386 | case AD_WAIT_WHILE_TIMER: /* for selection machine */ |
1da177e4 LT |
387 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); |
388 | break; | |
389 | } | |
3bf2d28a | 390 | |
1da177e4 LT |
391 | return retval; |
392 | } | |
393 | ||
394 | ||
3bf2d28a | 395 | /* ================= ad_rx_machine helper functions ================== */ |
1da177e4 | 396 | |
2d6682db JV |
397 | /** |
398 | * __choose_matched - update a port's matched variable from a received lacpdu | |
399 | * @lacpdu: the lacpdu we've received | |
400 | * @port: the port we're looking at | |
401 | * | |
402 | * Update the value of the matched variable, using parameter values from a | |
403 | * newly received lacpdu. Parameter values for the partner carried in the | |
404 | * received PDU are compared with the corresponding operational parameter | |
405 | * values for the actor. Matched is set to TRUE if all of these parameters | |
406 | * match and the PDU parameter partner_state.aggregation has the same value as | |
407 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
408 | * in the aggregation. Matched is also set to TRUE if the value of | |
409 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
410 | * an individual link and lacp will actively maintain the link. Otherwise, | |
411 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
412 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
413 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
414 | * partner_state.lacp_activity variables are TRUE. | |
415 | * | |
416 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
417 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
418 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
419 | */ | |
420 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
421 | { | |
815117ad | 422 | /* check if all parameters are alike |
423 | * or this is individual link(aggregation == FALSE) | |
424 | * then update the state machine Matched variable. | |
425 | */ | |
2d6682db JV |
426 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
427 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
815117ad | 428 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
2d6682db JV |
429 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
430 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
431 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
2d6682db JV |
432 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
433 | ) { | |
2d6682db JV |
434 | port->sm_vars |= AD_PORT_MATCHED; |
435 | } else { | |
436 | port->sm_vars &= ~AD_PORT_MATCHED; | |
437 | } | |
438 | } | |
439 | ||
1da177e4 LT |
440 | /** |
441 | * __record_pdu - record parameters from a received lacpdu | |
442 | * @lacpdu: the lacpdu we've received | |
443 | * @port: the port we're looking at | |
444 | * | |
445 | * Record the parameter values for the Actor carried in a received lacpdu as | |
446 | * the current partner operational parameter values and sets | |
447 | * actor_oper_port_state.defaulted to FALSE. | |
448 | */ | |
449 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
450 | { | |
1da177e4 | 451 | if (lacpdu && port) { |
b99d6ba9 HE |
452 | struct port_params *partner = &port->partner_oper; |
453 | ||
2d6682db | 454 | __choose_matched(lacpdu, port); |
3bf2d28a VF |
455 | /* record the new parameter values for the partner |
456 | * operational | |
457 | */ | |
b99d6ba9 HE |
458 | partner->port_number = ntohs(lacpdu->actor_port); |
459 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
460 | partner->system = lacpdu->actor_system; | |
461 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
462 | partner->key = ntohs(lacpdu->actor_key); | |
463 | partner->port_state = lacpdu->actor_state; | |
1da177e4 | 464 | |
3bf2d28a | 465 | /* set actor_oper_port_state.defaulted to FALSE */ |
1da177e4 LT |
466 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; |
467 | ||
3bf2d28a VF |
468 | /* set the partner sync. to on if the partner is sync, |
469 | * and the port is matched | |
470 | */ | |
63b46242 WK |
471 | if ((port->sm_vars & AD_PORT_MATCHED) && |
472 | (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { | |
b99d6ba9 | 473 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
63b46242 WK |
474 | pr_debug("%s partner sync=1\n", port->slave->dev->name); |
475 | } else { | |
b99d6ba9 | 476 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
63b46242 WK |
477 | pr_debug("%s partner sync=0\n", port->slave->dev->name); |
478 | } | |
1da177e4 LT |
479 | } |
480 | } | |
481 | ||
482 | /** | |
483 | * __record_default - record default parameters | |
484 | * @port: the port we're looking at | |
485 | * | |
486 | * This function records the default parameter values for the partner carried | |
487 | * in the Partner Admin parameters as the current partner operational parameter | |
488 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
489 | */ | |
490 | static void __record_default(struct port *port) | |
491 | { | |
1da177e4 | 492 | if (port) { |
3bf2d28a | 493 | /* record the partner admin parameters */ |
5eefd1ad HE |
494 | memcpy(&port->partner_oper, &port->partner_admin, |
495 | sizeof(struct port_params)); | |
1da177e4 | 496 | |
3bf2d28a | 497 | /* set actor_oper_port_state.defaulted to true */ |
1da177e4 LT |
498 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; |
499 | } | |
500 | } | |
501 | ||
502 | /** | |
503 | * __update_selected - update a port's Selected variable from a received lacpdu | |
504 | * @lacpdu: the lacpdu we've received | |
505 | * @port: the port we're looking at | |
506 | * | |
507 | * Update the value of the selected variable, using parameter values from a | |
508 | * newly received lacpdu. The parameter values for the Actor carried in the | |
509 | * received PDU are compared with the corresponding operational parameter | |
510 | * values for the ports partner. If one or more of the comparisons shows that | |
511 | * the value(s) received in the PDU differ from the current operational values, | |
512 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
513 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
514 | */ | |
515 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
516 | { | |
1da177e4 | 517 | if (lacpdu && port) { |
ce6a49ad HE |
518 | const struct port_params *partner = &port->partner_oper; |
519 | ||
815117ad | 520 | /* check if any parameter is different then |
521 | * update the state machine selected variable. | |
522 | */ | |
8e95a202 JP |
523 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
524 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
815117ad | 525 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
8e95a202 JP |
526 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
527 | ntohs(lacpdu->actor_key) != partner->key || | |
528 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
529 | port->sm_vars &= ~AD_PORT_SELECTED; |
530 | } | |
531 | } | |
532 | } | |
533 | ||
534 | /** | |
535 | * __update_default_selected - update a port's Selected variable from Partner | |
536 | * @port: the port we're looking at | |
537 | * | |
538 | * This function updates the value of the selected variable, using the partner | |
539 | * administrative parameter values. The administrative values are compared with | |
540 | * the corresponding operational parameter values for the partner. If one or | |
541 | * more of the comparisons shows that the administrative value(s) differ from | |
542 | * the current operational values, then Selected is set to FALSE and | |
543 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
544 | * Selected remains unchanged. | |
545 | */ | |
546 | static void __update_default_selected(struct port *port) | |
547 | { | |
1da177e4 | 548 | if (port) { |
3c52065f HE |
549 | const struct port_params *admin = &port->partner_admin; |
550 | const struct port_params *oper = &port->partner_oper; | |
551 | ||
815117ad | 552 | /* check if any parameter is different then |
553 | * update the state machine selected variable. | |
554 | */ | |
8e95a202 JP |
555 | if (admin->port_number != oper->port_number || |
556 | admin->port_priority != oper->port_priority || | |
815117ad | 557 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
8e95a202 JP |
558 | admin->system_priority != oper->system_priority || |
559 | admin->key != oper->key || | |
560 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 561 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
562 | port->sm_vars &= ~AD_PORT_SELECTED; |
563 | } | |
564 | } | |
565 | } | |
566 | ||
1da177e4 LT |
567 | /** |
568 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
569 | * @lacpdu: the lacpdu we've received | |
570 | * @port: the port we're looking at | |
571 | * | |
572 | * Updates the value of the ntt variable, using parameter values from a newly | |
573 | * received lacpdu. The parameter values for the partner carried in the | |
574 | * received PDU are compared with the corresponding operational parameter | |
575 | * values for the Actor. If one or more of the comparisons shows that the | |
576 | * value(s) received in the PDU differ from the current operational values, | |
577 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
578 | */ | |
579 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
580 | { | |
815117ad | 581 | /* validate lacpdu and port */ |
1da177e4 | 582 | if (lacpdu && port) { |
815117ad | 583 | /* check if any parameter is different then |
584 | * update the port->ntt. | |
585 | */ | |
89cc76f9 JV |
586 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
587 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
815117ad | 588 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
589 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
590 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
591 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
592 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
593 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
594 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
595 | ) { | |
d238d458 | 596 | port->ntt = true; |
1da177e4 LT |
597 | } |
598 | } | |
599 | } | |
600 | ||
1da177e4 LT |
601 | /** |
602 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
603 | * @aggregator: the aggregator we're looking at | |
604 | * | |
605 | */ | |
606 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
607 | { | |
608 | struct port *port; | |
609 | int retval = 1; | |
610 | ||
611 | if (aggregator) { | |
3bf2d28a VF |
612 | /* scan all ports in this aggregator to verfy if they are |
613 | * all ready. | |
614 | */ | |
128ea6c3 BD |
615 | for (port = aggregator->lag_ports; |
616 | port; | |
617 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
618 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
619 | retval = 0; | |
620 | break; | |
621 | } | |
622 | } | |
623 | } | |
624 | ||
625 | return retval; | |
626 | } | |
627 | ||
628 | /** | |
629 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
630 | * @aggregator: the aggregator we're looking at | |
631 | * @val: Should the ports' ready bit be set on or off | |
632 | * | |
633 | */ | |
634 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
635 | { | |
636 | struct port *port; | |
637 | ||
128ea6c3 BD |
638 | for (port = aggregator->lag_ports; port; |
639 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 640 | if (val) |
1da177e4 | 641 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 642 | else |
1da177e4 | 643 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
644 | } |
645 | } | |
646 | ||
647 | /** | |
648 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
649 | * @aggregator: the aggregator we're looking at | |
650 | * | |
651 | */ | |
652 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
653 | { | |
128ea6c3 | 654 | u32 bandwidth = 0; |
1da177e4 LT |
655 | |
656 | if (aggregator->num_of_ports) { | |
65cce19c | 657 | switch (__get_link_speed(aggregator->lag_ports)) { |
cb8dda90 | 658 | case AD_LINK_SPEED_1MBPS: |
1da177e4 LT |
659 | bandwidth = aggregator->num_of_ports; |
660 | break; | |
cb8dda90 | 661 | case AD_LINK_SPEED_10MBPS: |
1da177e4 LT |
662 | bandwidth = aggregator->num_of_ports * 10; |
663 | break; | |
cb8dda90 | 664 | case AD_LINK_SPEED_100MBPS: |
1da177e4 LT |
665 | bandwidth = aggregator->num_of_ports * 100; |
666 | break; | |
cb8dda90 | 667 | case AD_LINK_SPEED_1000MBPS: |
1da177e4 LT |
668 | bandwidth = aggregator->num_of_ports * 1000; |
669 | break; | |
424c3232 JX |
670 | case AD_LINK_SPEED_2500MBPS: |
671 | bandwidth = aggregator->num_of_ports * 2500; | |
672 | break; | |
cb8dda90 | 673 | case AD_LINK_SPEED_10000MBPS: |
94dbffd5 JV |
674 | bandwidth = aggregator->num_of_ports * 10000; |
675 | break; | |
424c3232 JX |
676 | case AD_LINK_SPEED_20000MBPS: |
677 | bandwidth = aggregator->num_of_ports * 20000; | |
678 | break; | |
679 | case AD_LINK_SPEED_40000MBPS: | |
680 | bandwidth = aggregator->num_of_ports * 40000; | |
681 | break; | |
682 | case AD_LINK_SPEED_56000MBPS: | |
683 | bandwidth = aggregator->num_of_ports * 56000; | |
684 | break; | |
1da177e4 | 685 | default: |
3bf2d28a | 686 | bandwidth = 0; /* to silence the compiler */ |
1da177e4 LT |
687 | } |
688 | } | |
689 | return bandwidth; | |
690 | } | |
691 | ||
692 | /** | |
693 | * __get_active_agg - get the current active aggregator | |
694 | * @aggregator: the aggregator we're looking at | |
49b7624e VF |
695 | * |
696 | * Caller must hold RCU lock. | |
1da177e4 LT |
697 | */ |
698 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
699 | { | |
19177e7d VF |
700 | struct bonding *bond = aggregator->slave->bond; |
701 | struct list_head *iter; | |
702 | struct slave *slave; | |
1da177e4 | 703 | |
be79bd04 | 704 | bond_for_each_slave_rcu(bond, slave, iter) |
3fdddd85 | 705 | if (SLAVE_AD_INFO(slave)->aggregator.is_active) |
706 | return &(SLAVE_AD_INFO(slave)->aggregator); | |
1da177e4 | 707 | |
19177e7d | 708 | return NULL; |
1da177e4 LT |
709 | } |
710 | ||
711 | /** | |
712 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
713 | * @port: the port we're looking at | |
1da177e4 LT |
714 | */ |
715 | static inline void __update_lacpdu_from_port(struct port *port) | |
716 | { | |
717 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 718 | const struct port_params *partner = &port->partner_oper; |
1da177e4 | 719 | |
3bf2d28a VF |
720 | /* update current actual Actor parameters |
721 | * lacpdu->subtype initialized | |
1da177e4 LT |
722 | * lacpdu->version_number initialized |
723 | * lacpdu->tlv_type_actor_info initialized | |
724 | * lacpdu->actor_information_length initialized | |
725 | */ | |
726 | ||
d3bb52b0 | 727 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 728 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
729 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
730 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
731 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 | 732 | lacpdu->actor_state = port->actor_oper_port_state; |
63b46242 WK |
733 | pr_debug("update lacpdu: %s, actor port state %x\n", |
734 | port->slave->dev->name, port->actor_oper_port_state); | |
1da177e4 LT |
735 | |
736 | /* lacpdu->reserved_3_1 initialized | |
737 | * lacpdu->tlv_type_partner_info initialized | |
738 | * lacpdu->partner_information_length initialized | |
739 | */ | |
740 | ||
3b5b35d0 HE |
741 | lacpdu->partner_system_priority = htons(partner->system_priority); |
742 | lacpdu->partner_system = partner->system; | |
743 | lacpdu->partner_key = htons(partner->key); | |
744 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
745 | lacpdu->partner_port = htons(partner->port_number); | |
746 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
747 | |
748 | /* lacpdu->reserved_3_2 initialized | |
749 | * lacpdu->tlv_type_collector_info initialized | |
750 | * lacpdu->collector_information_length initialized | |
751 | * collector_max_delay initialized | |
752 | * reserved_12[12] initialized | |
753 | * tlv_type_terminator initialized | |
754 | * terminator_length initialized | |
755 | * reserved_50[50] initialized | |
756 | */ | |
1da177e4 LT |
757 | } |
758 | ||
3bf2d28a | 759 | /* ================= main 802.3ad protocol code ========================= */ |
1da177e4 LT |
760 | |
761 | /** | |
762 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
763 | * @port: the port we're looking at | |
764 | * | |
765 | * Returns: 0 on success | |
766 | * < 0 on error | |
767 | */ | |
768 | static int ad_lacpdu_send(struct port *port) | |
769 | { | |
770 | struct slave *slave = port->slave; | |
771 | struct sk_buff *skb; | |
772 | struct lacpdu_header *lacpdu_header; | |
773 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
774 | |
775 | skb = dev_alloc_skb(length); | |
7bfc4753 | 776 | if (!skb) |
1da177e4 | 777 | return -ENOMEM; |
1da177e4 LT |
778 | |
779 | skb->dev = slave->dev; | |
459a98ed | 780 | skb_reset_mac_header(skb); |
b0e380b1 | 781 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
782 | skb->protocol = PKT_TYPE_LACPDU; |
783 | skb->priority = TC_PRIO_CONTROL; | |
784 | ||
785 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
786 | ||
ada0f863 | 787 | ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 788 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
789 | * because we use it to identify loopback lacpdus in receive. |
790 | */ | |
ada0f863 | 791 | ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 792 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 793 | |
3bf2d28a | 794 | lacpdu_header->lacpdu = port->lacpdu; |
1da177e4 LT |
795 | |
796 | dev_queue_xmit(skb); | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | /** | |
802 | * ad_marker_send - send marker information/response on a given port | |
803 | * @port: the port we're looking at | |
804 | * @marker: marker data to send | |
805 | * | |
806 | * Returns: 0 on success | |
807 | * < 0 on error | |
808 | */ | |
1c3f0b8e | 809 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
810 | { |
811 | struct slave *slave = port->slave; | |
812 | struct sk_buff *skb; | |
1c3f0b8e MD |
813 | struct bond_marker_header *marker_header; |
814 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
815 | |
816 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 817 | if (!skb) |
1da177e4 | 818 | return -ENOMEM; |
1da177e4 LT |
819 | |
820 | skb_reserve(skb, 16); | |
821 | ||
822 | skb->dev = slave->dev; | |
459a98ed | 823 | skb_reset_mac_header(skb); |
b0e380b1 | 824 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
825 | skb->protocol = PKT_TYPE_LACPDU; |
826 | ||
1c3f0b8e | 827 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 828 | |
ada0f863 | 829 | ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 830 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
831 | * because we use it to identify loopback MARKERs in receive. |
832 | */ | |
ada0f863 | 833 | ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 834 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 835 | |
3bf2d28a | 836 | marker_header->marker = *marker; |
1da177e4 LT |
837 | |
838 | dev_queue_xmit(skb); | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | /** | |
844 | * ad_mux_machine - handle a port's mux state machine | |
845 | * @port: the port we're looking at | |
ee637714 | 846 | * @update_slave_arr: Does slave array need update? |
1da177e4 | 847 | */ |
ee637714 | 848 | static void ad_mux_machine(struct port *port, bool *update_slave_arr) |
1da177e4 LT |
849 | { |
850 | mux_states_t last_state; | |
851 | ||
3bf2d28a VF |
852 | /* keep current State Machine state to compare later if it was |
853 | * changed | |
854 | */ | |
1da177e4 LT |
855 | last_state = port->sm_mux_state; |
856 | ||
857 | if (port->sm_vars & AD_PORT_BEGIN) { | |
3bf2d28a | 858 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
859 | } else { |
860 | switch (port->sm_mux_state) { | |
861 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
862 | if ((port->sm_vars & AD_PORT_SELECTED) |
863 | || (port->sm_vars & AD_PORT_STANDBY)) | |
864 | /* if SELECTED or STANDBY */ | |
3bf2d28a | 865 | port->sm_mux_state = AD_MUX_WAITING; |
1da177e4 LT |
866 | break; |
867 | case AD_MUX_WAITING: | |
3bf2d28a VF |
868 | /* if SELECTED == FALSE return to DETACH state */ |
869 | if (!(port->sm_vars & AD_PORT_SELECTED)) { | |
1da177e4 | 870 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
871 | /* in order to withhold the Selection Logic to |
872 | * check all ports READY_N value every callback | |
873 | * cycle to update ready variable, we check | |
874 | * READY_N and update READY here | |
875 | */ | |
1da177e4 | 876 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 877 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
878 | break; |
879 | } | |
880 | ||
3bf2d28a | 881 | /* check if the wait_while_timer expired */ |
7bfc4753 BD |
882 | if (port->sm_mux_timer_counter |
883 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 884 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 | 885 | |
3bf2d28a VF |
886 | /* in order to withhold the selection logic to check |
887 | * all ports READY_N value every callback cycle to | |
888 | * update ready variable, we check READY_N and update | |
889 | * READY here | |
890 | */ | |
1da177e4 LT |
891 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
892 | ||
3bf2d28a VF |
893 | /* if the wait_while_timer expired, and the port is |
894 | * in READY state, move to ATTACHED state | |
895 | */ | |
7bfc4753 BD |
896 | if ((port->sm_vars & AD_PORT_READY) |
897 | && !port->sm_mux_timer_counter) | |
3bf2d28a | 898 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 LT |
899 | break; |
900 | case AD_MUX_ATTACHED: | |
3bf2d28a VF |
901 | /* check also if agg_select_timer expired (so the |
902 | * edable port will take place only after this timer) | |
903 | */ | |
904 | if ((port->sm_vars & AD_PORT_SELECTED) && | |
905 | (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && | |
906 | !__check_agg_selection_timer(port)) { | |
63b46242 WK |
907 | if (port->aggregator->is_active) |
908 | port->sm_mux_state = | |
909 | AD_MUX_COLLECTING_DISTRIBUTING; | |
3bf2d28a VF |
910 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || |
911 | (port->sm_vars & AD_PORT_STANDBY)) { | |
912 | /* if UNSELECTED or STANDBY */ | |
1da177e4 | 913 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
914 | /* in order to withhold the selection logic to |
915 | * check all ports READY_N value every callback | |
916 | * cycle to update ready variable, we check | |
917 | * READY_N and update READY here | |
918 | */ | |
1da177e4 | 919 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 920 | port->sm_mux_state = AD_MUX_DETACHED; |
63b46242 WK |
921 | } else if (port->aggregator->is_active) { |
922 | port->actor_oper_port_state |= | |
923 | AD_STATE_SYNCHRONIZATION; | |
1da177e4 LT |
924 | } |
925 | break; | |
926 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
3bf2d28a VF |
927 | if (!(port->sm_vars & AD_PORT_SELECTED) || |
928 | (port->sm_vars & AD_PORT_STANDBY) || | |
63b46242 WK |
929 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || |
930 | !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { | |
3bf2d28a | 931 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 | 932 | } else { |
3bf2d28a VF |
933 | /* if port state hasn't changed make |
934 | * sure that a collecting distributing | |
935 | * port in an active aggregator is enabled | |
936 | */ | |
1da177e4 LT |
937 | if (port->aggregator && |
938 | port->aggregator->is_active && | |
939 | !__port_is_enabled(port)) { | |
940 | ||
941 | __enable_port(port); | |
942 | } | |
943 | } | |
944 | break; | |
3bf2d28a | 945 | default: |
1da177e4 LT |
946 | break; |
947 | } | |
948 | } | |
949 | ||
3bf2d28a | 950 | /* check if the state machine was changed */ |
1da177e4 | 951 | if (port->sm_mux_state != last_state) { |
63b46242 WK |
952 | pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", |
953 | port->actor_port_number, | |
954 | port->slave->dev->name, | |
955 | last_state, | |
a4aee5c8 | 956 | port->sm_mux_state); |
1da177e4 LT |
957 | switch (port->sm_mux_state) { |
958 | case AD_MUX_DETACHED: | |
1da177e4 | 959 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
ee637714 MB |
960 | ad_disable_collecting_distributing(port, |
961 | update_slave_arr); | |
1da177e4 LT |
962 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; |
963 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 964 | port->ntt = true; |
1da177e4 LT |
965 | break; |
966 | case AD_MUX_WAITING: | |
967 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
968 | break; | |
969 | case AD_MUX_ATTACHED: | |
63b46242 WK |
970 | if (port->aggregator->is_active) |
971 | port->actor_oper_port_state |= | |
972 | AD_STATE_SYNCHRONIZATION; | |
973 | else | |
974 | port->actor_oper_port_state &= | |
975 | ~AD_STATE_SYNCHRONIZATION; | |
1da177e4 LT |
976 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; |
977 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
ee637714 MB |
978 | ad_disable_collecting_distributing(port, |
979 | update_slave_arr); | |
d238d458 | 980 | port->ntt = true; |
1da177e4 LT |
981 | break; |
982 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
983 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
984 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
63b46242 | 985 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; |
ee637714 MB |
986 | ad_enable_collecting_distributing(port, |
987 | update_slave_arr); | |
d238d458 | 988 | port->ntt = true; |
1da177e4 | 989 | break; |
3bf2d28a | 990 | default: |
1da177e4 LT |
991 | break; |
992 | } | |
993 | } | |
994 | } | |
995 | ||
996 | /** | |
997 | * ad_rx_machine - handle a port's rx State Machine | |
998 | * @lacpdu: the lacpdu we've received | |
999 | * @port: the port we're looking at | |
1000 | * | |
1001 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
1002 | * CURRENT. If timer expired set the state machine in the proper state. | |
1003 | * In other cases, this function checks if we need to switch to other state. | |
1004 | */ | |
1005 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
1006 | { | |
1007 | rx_states_t last_state; | |
1008 | ||
3bf2d28a VF |
1009 | /* keep current State Machine state to compare later if it was |
1010 | * changed | |
1011 | */ | |
1da177e4 LT |
1012 | last_state = port->sm_rx_state; |
1013 | ||
3bf2d28a VF |
1014 | /* check if state machine should change state */ |
1015 | ||
1016 | /* first, check if port was reinitialized */ | |
14c9551a | 1017 | if (port->sm_vars & AD_PORT_BEGIN) { |
7bfc4753 | 1018 | port->sm_rx_state = AD_RX_INITIALIZE; |
ef015d72 | 1019 | port->sm_vars |= AD_PORT_CHURNED; |
3bf2d28a | 1020 | /* check if port is not enabled */ |
14c9551a | 1021 | } else if (!(port->sm_vars & AD_PORT_BEGIN) |
7bfc4753 | 1022 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) |
7bfc4753 | 1023 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
3bf2d28a VF |
1024 | /* check if new lacpdu arrived */ |
1025 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || | |
1026 | (port->sm_rx_state == AD_RX_DEFAULTED) || | |
1027 | (port->sm_rx_state == AD_RX_CURRENT))) { | |
14c9551a | 1028 | if (port->sm_rx_state != AD_RX_CURRENT) |
ef015d72 | 1029 | port->sm_vars |= AD_PORT_CHURNED; |
3bf2d28a | 1030 | port->sm_rx_timer_counter = 0; |
1da177e4 LT |
1031 | port->sm_rx_state = AD_RX_CURRENT; |
1032 | } else { | |
3bf2d28a VF |
1033 | /* if timer is on, and if it is expired */ |
1034 | if (port->sm_rx_timer_counter && | |
1035 | !(--port->sm_rx_timer_counter)) { | |
1da177e4 LT |
1036 | switch (port->sm_rx_state) { |
1037 | case AD_RX_EXPIRED: | |
3bf2d28a | 1038 | port->sm_rx_state = AD_RX_DEFAULTED; |
1da177e4 LT |
1039 | break; |
1040 | case AD_RX_CURRENT: | |
3bf2d28a | 1041 | port->sm_rx_state = AD_RX_EXPIRED; |
1da177e4 | 1042 | break; |
3bf2d28a | 1043 | default: |
1da177e4 LT |
1044 | break; |
1045 | } | |
1046 | } else { | |
3bf2d28a | 1047 | /* if no lacpdu arrived and no timer is on */ |
1da177e4 LT |
1048 | switch (port->sm_rx_state) { |
1049 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 1050 | if (port->sm_vars & AD_PORT_MOVED) |
3bf2d28a | 1051 | port->sm_rx_state = AD_RX_INITIALIZE; |
7bfc4753 BD |
1052 | else if (port->is_enabled |
1053 | && (port->sm_vars | |
1054 | & AD_PORT_LACP_ENABLED)) | |
3bf2d28a | 1055 | port->sm_rx_state = AD_RX_EXPIRED; |
7bfc4753 BD |
1056 | else if (port->is_enabled |
1057 | && ((port->sm_vars | |
1058 | & AD_PORT_LACP_ENABLED) == 0)) | |
3bf2d28a | 1059 | port->sm_rx_state = AD_RX_LACP_DISABLED; |
1da177e4 | 1060 | break; |
3bf2d28a | 1061 | default: |
1da177e4 LT |
1062 | break; |
1063 | ||
1064 | } | |
1065 | } | |
1066 | } | |
1067 | ||
3bf2d28a | 1068 | /* check if the State machine was changed or new lacpdu arrived */ |
1da177e4 | 1069 | if ((port->sm_rx_state != last_state) || (lacpdu)) { |
63b46242 WK |
1070 | pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", |
1071 | port->actor_port_number, | |
1072 | port->slave->dev->name, | |
1073 | last_state, | |
a4aee5c8 | 1074 | port->sm_rx_state); |
1da177e4 LT |
1075 | switch (port->sm_rx_state) { |
1076 | case AD_RX_INITIALIZE: | |
cb8dda90 | 1077 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) |
1da177e4 | 1078 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1079 | else |
1da177e4 | 1080 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1081 | port->sm_vars &= ~AD_PORT_SELECTED; |
1082 | __record_default(port); | |
1083 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1084 | port->sm_vars &= ~AD_PORT_MOVED; | |
3bf2d28a | 1085 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
1da177e4 | 1086 | |
3bf2d28a | 1087 | /* Fall Through */ |
1da177e4 LT |
1088 | case AD_RX_PORT_DISABLED: |
1089 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1090 | break; | |
1091 | case AD_RX_LACP_DISABLED: | |
1092 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1093 | __record_default(port); | |
1055c9ab | 1094 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1095 | port->sm_vars |= AD_PORT_MATCHED; |
1096 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1097 | break; | |
1098 | case AD_RX_EXPIRED: | |
3bf2d28a VF |
1099 | /* Reset of the Synchronization flag (Standard 43.4.12) |
1100 | * This reset cause to disable this port in the | |
1101 | * COLLECTING_DISTRIBUTING state of the mux machine in | |
1102 | * case of EXPIRED even if LINK_DOWN didn't arrive for | |
1103 | * the port. | |
1104 | */ | |
1055c9ab | 1105 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1106 | port->sm_vars &= ~AD_PORT_MATCHED; |
14c9551a | 1107 | port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; |
3bf2d28a | 1108 | port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; |
1da177e4 LT |
1109 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1110 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
ef015d72 | 1111 | port->sm_vars |= AD_PORT_CHURNED; |
1da177e4 LT |
1112 | break; |
1113 | case AD_RX_DEFAULTED: | |
1114 | __update_default_selected(port); | |
1115 | __record_default(port); | |
1116 | port->sm_vars |= AD_PORT_MATCHED; | |
1117 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1118 | break; | |
1119 | case AD_RX_CURRENT: | |
815117ad | 1120 | /* detect loopback situation */ |
3bf2d28a VF |
1121 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), |
1122 | &(port->actor_system))) { | |
d4471f5e | 1123 | netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" |
90194264 | 1124 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", |
3bf2d28a | 1125 | port->slave->dev->name); |
1da177e4 LT |
1126 | return; |
1127 | } | |
1128 | __update_selected(lacpdu, port); | |
1129 | __update_ntt(lacpdu, port); | |
1130 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1131 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1132 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 | 1133 | break; |
3bf2d28a | 1134 | default: |
1da177e4 LT |
1135 | break; |
1136 | } | |
1137 | } | |
1da177e4 LT |
1138 | } |
1139 | ||
14c9551a MB |
1140 | /** |
1141 | * ad_churn_machine - handle port churn's state machine | |
1142 | * @port: the port we're looking at | |
1143 | * | |
1144 | */ | |
1145 | static void ad_churn_machine(struct port *port) | |
1146 | { | |
ef015d72 MB |
1147 | if (port->sm_vars & AD_PORT_CHURNED) { |
1148 | port->sm_vars &= ~AD_PORT_CHURNED; | |
14c9551a MB |
1149 | port->sm_churn_actor_state = AD_CHURN_MONITOR; |
1150 | port->sm_churn_partner_state = AD_CHURN_MONITOR; | |
1151 | port->sm_churn_actor_timer_counter = | |
1152 | __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); | |
1153 | port->sm_churn_partner_timer_counter = | |
1154 | __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); | |
1155 | return; | |
1156 | } | |
1157 | if (port->sm_churn_actor_timer_counter && | |
1158 | !(--port->sm_churn_actor_timer_counter) && | |
1159 | port->sm_churn_actor_state == AD_CHURN_MONITOR) { | |
1160 | if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { | |
1161 | port->sm_churn_actor_state = AD_NO_CHURN; | |
1162 | } else { | |
1163 | port->churn_actor_count++; | |
1164 | port->sm_churn_actor_state = AD_CHURN; | |
1165 | } | |
1166 | } | |
1167 | if (port->sm_churn_partner_timer_counter && | |
1168 | !(--port->sm_churn_partner_timer_counter) && | |
1169 | port->sm_churn_partner_state == AD_CHURN_MONITOR) { | |
1170 | if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { | |
1171 | port->sm_churn_partner_state = AD_NO_CHURN; | |
1172 | } else { | |
1173 | port->churn_partner_count++; | |
1174 | port->sm_churn_partner_state = AD_CHURN; | |
1175 | } | |
1176 | } | |
1177 | } | |
1178 | ||
1da177e4 LT |
1179 | /** |
1180 | * ad_tx_machine - handle a port's tx state machine | |
1181 | * @port: the port we're looking at | |
1da177e4 LT |
1182 | */ |
1183 | static void ad_tx_machine(struct port *port) | |
1184 | { | |
3bf2d28a VF |
1185 | /* check if tx timer expired, to verify that we do not send more than |
1186 | * 3 packets per second | |
1187 | */ | |
1da177e4 | 1188 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { |
3bf2d28a | 1189 | /* check if there is something to send */ |
1da177e4 LT |
1190 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { |
1191 | __update_lacpdu_from_port(port); | |
d238d458 | 1192 | |
1da177e4 | 1193 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1194 | pr_debug("Sent LACPDU on port %d\n", |
1195 | port->actor_port_number); | |
d238d458 | 1196 | |
3bf2d28a VF |
1197 | /* mark ntt as false, so it will not be sent |
1198 | * again until demanded | |
1199 | */ | |
d238d458 | 1200 | port->ntt = false; |
1da177e4 LT |
1201 | } |
1202 | } | |
3bf2d28a VF |
1203 | /* restart tx timer(to verify that we will not exceed |
1204 | * AD_MAX_TX_IN_SECOND | |
1205 | */ | |
1206 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1207 | } |
1208 | } | |
1209 | ||
1210 | /** | |
1211 | * ad_periodic_machine - handle a port's periodic state machine | |
1212 | * @port: the port we're looking at | |
1213 | * | |
1214 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1215 | */ | |
1216 | static void ad_periodic_machine(struct port *port) | |
1217 | { | |
1218 | periodic_states_t last_state; | |
1219 | ||
3bf2d28a | 1220 | /* keep current state machine state to compare later if it was changed */ |
1da177e4 LT |
1221 | last_state = port->sm_periodic_state; |
1222 | ||
3bf2d28a | 1223 | /* check if port was reinitialized */ |
1da177e4 | 1224 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || |
1055c9ab | 1225 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 | 1226 | ) { |
3bf2d28a | 1227 | port->sm_periodic_state = AD_NO_PERIODIC; |
1da177e4 | 1228 | } |
3bf2d28a | 1229 | /* check if state machine should change state */ |
1da177e4 | 1230 | else if (port->sm_periodic_timer_counter) { |
3bf2d28a | 1231 | /* check if periodic state machine expired */ |
1da177e4 | 1232 | if (!(--port->sm_periodic_timer_counter)) { |
3bf2d28a VF |
1233 | /* if expired then do tx */ |
1234 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1da177e4 | 1235 | } else { |
3bf2d28a VF |
1236 | /* If not expired, check if there is some new timeout |
1237 | * parameter from the partner state | |
1238 | */ | |
1da177e4 LT |
1239 | switch (port->sm_periodic_state) { |
1240 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1241 | if (!(port->partner_oper.port_state |
1242 | & AD_STATE_LACP_TIMEOUT)) | |
3bf2d28a | 1243 | port->sm_periodic_state = AD_SLOW_PERIODIC; |
1da177e4 LT |
1244 | break; |
1245 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1246 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 | 1247 | port->sm_periodic_timer_counter = 0; |
3bf2d28a | 1248 | port->sm_periodic_state = AD_PERIODIC_TX; |
1da177e4 LT |
1249 | } |
1250 | break; | |
3bf2d28a | 1251 | default: |
1da177e4 LT |
1252 | break; |
1253 | } | |
1254 | } | |
1255 | } else { | |
1256 | switch (port->sm_periodic_state) { | |
1257 | case AD_NO_PERIODIC: | |
3bf2d28a | 1258 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 LT |
1259 | break; |
1260 | case AD_PERIODIC_TX: | |
3bf2d28a VF |
1261 | if (!(port->partner_oper.port_state & |
1262 | AD_STATE_LACP_TIMEOUT)) | |
1263 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
7bfc4753 | 1264 | else |
3bf2d28a | 1265 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 | 1266 | break; |
3bf2d28a | 1267 | default: |
1da177e4 LT |
1268 | break; |
1269 | } | |
1270 | } | |
1271 | ||
3bf2d28a | 1272 | /* check if the state machine was changed */ |
1da177e4 | 1273 | if (port->sm_periodic_state != last_state) { |
a4aee5c8 JP |
1274 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1275 | port->actor_port_number, last_state, | |
1276 | port->sm_periodic_state); | |
1da177e4 LT |
1277 | switch (port->sm_periodic_state) { |
1278 | case AD_NO_PERIODIC: | |
3bf2d28a | 1279 | port->sm_periodic_timer_counter = 0; |
1da177e4 LT |
1280 | break; |
1281 | case AD_FAST_PERIODIC: | |
3bf2d28a VF |
1282 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1283 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; | |
1da177e4 LT |
1284 | break; |
1285 | case AD_SLOW_PERIODIC: | |
3bf2d28a VF |
1286 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1287 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; | |
1da177e4 LT |
1288 | break; |
1289 | case AD_PERIODIC_TX: | |
d238d458 | 1290 | port->ntt = true; |
1da177e4 | 1291 | break; |
3bf2d28a | 1292 | default: |
1da177e4 LT |
1293 | break; |
1294 | } | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | /** | |
1299 | * ad_port_selection_logic - select aggregation groups | |
1300 | * @port: the port we're looking at | |
ee637714 | 1301 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1302 | * |
1303 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1304 | * selection logic is called in the inititalization (after all the handshkes), | |
1305 | * and after every lacpdu receive (if selected is off). | |
1306 | */ | |
ee637714 | 1307 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) |
1da177e4 LT |
1308 | { |
1309 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1310 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1311 | struct list_head *iter; |
1312 | struct bonding *bond; | |
1313 | struct slave *slave; | |
1da177e4 LT |
1314 | int found = 0; |
1315 | ||
3bf2d28a | 1316 | /* if the port is already Selected, do nothing */ |
7bfc4753 | 1317 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1318 | return; |
1da177e4 | 1319 | |
3e36bb75 VF |
1320 | bond = __get_bond_by_port(port); |
1321 | ||
3bf2d28a | 1322 | /* if the port is connected to other aggregator, detach it */ |
1da177e4 | 1323 | if (port->aggregator) { |
3bf2d28a | 1324 | /* detach the port from its former aggregator */ |
128ea6c3 BD |
1325 | temp_aggregator = port->aggregator; |
1326 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1327 | last_port = curr_port, | |
3bf2d28a | 1328 | curr_port = curr_port->next_port_in_aggregator) { |
1da177e4 LT |
1329 | if (curr_port == port) { |
1330 | temp_aggregator->num_of_ports--; | |
3bf2d28a VF |
1331 | /* if it is the first port attached to the |
1332 | * aggregator | |
1333 | */ | |
1334 | if (!last_port) { | |
128ea6c3 BD |
1335 | temp_aggregator->lag_ports = |
1336 | port->next_port_in_aggregator; | |
3bf2d28a VF |
1337 | } else { |
1338 | /* not the first port attached to the | |
1339 | * aggregator | |
1340 | */ | |
128ea6c3 BD |
1341 | last_port->next_port_in_aggregator = |
1342 | port->next_port_in_aggregator; | |
1da177e4 LT |
1343 | } |
1344 | ||
3bf2d28a VF |
1345 | /* clear the port's relations to this |
1346 | * aggregator | |
1347 | */ | |
1da177e4 | 1348 | port->aggregator = NULL; |
128ea6c3 BD |
1349 | port->next_port_in_aggregator = NULL; |
1350 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1351 | |
d4471f5e VF |
1352 | netdev_dbg(bond->dev, "Port %d left LAG %d\n", |
1353 | port->actor_port_number, | |
1354 | temp_aggregator->aggregator_identifier); | |
3bf2d28a VF |
1355 | /* if the aggregator is empty, clear its |
1356 | * parameters, and set it ready to be attached | |
1357 | */ | |
7bfc4753 | 1358 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1359 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1360 | break; |
1361 | } | |
1362 | } | |
3bf2d28a VF |
1363 | if (!curr_port) { |
1364 | /* meaning: the port was related to an aggregator | |
1365 | * but was not on the aggregator port list | |
1366 | */ | |
d4471f5e VF |
1367 | net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
1368 | port->slave->bond->dev->name, | |
1369 | port->actor_port_number, | |
1370 | port->slave->dev->name, | |
1371 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1372 | } |
1373 | } | |
3bf2d28a | 1374 | /* search on all aggregators for a suitable aggregator for this port */ |
3e36bb75 | 1375 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 1376 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 | 1377 | |
3bf2d28a | 1378 | /* keep a free aggregator for later use(if needed) */ |
1da177e4 | 1379 | if (!aggregator->lag_ports) { |
7bfc4753 | 1380 | if (!free_aggregator) |
128ea6c3 | 1381 | free_aggregator = aggregator; |
1da177e4 LT |
1382 | continue; |
1383 | } | |
815117ad | 1384 | /* check if current aggregator suits us */ |
1385 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1386 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1055c9ab HE |
1387 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
1388 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1389 | ) && |
815117ad | 1390 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
1391 | !aggregator->is_individual) /* but is not individual OR */ | |
1da177e4 LT |
1392 | ) |
1393 | ) { | |
815117ad | 1394 | /* attach to the founded aggregator */ |
1da177e4 | 1395 | port->aggregator = aggregator; |
128ea6c3 BD |
1396 | port->actor_port_aggregator_identifier = |
1397 | port->aggregator->aggregator_identifier; | |
1398 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1399 | port->aggregator->num_of_ports++; |
128ea6c3 | 1400 | aggregator->lag_ports = port; |
d4471f5e VF |
1401 | netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", |
1402 | port->actor_port_number, | |
1403 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1404 | |
3bf2d28a | 1405 | /* mark this port as selected */ |
1da177e4 LT |
1406 | port->sm_vars |= AD_PORT_SELECTED; |
1407 | found = 1; | |
1408 | break; | |
1409 | } | |
1410 | } | |
1411 | ||
3bf2d28a VF |
1412 | /* the port couldn't find an aggregator - attach it to a new |
1413 | * aggregator | |
1414 | */ | |
1da177e4 LT |
1415 | if (!found) { |
1416 | if (free_aggregator) { | |
3bf2d28a | 1417 | /* assign port a new aggregator */ |
1da177e4 | 1418 | port->aggregator = free_aggregator; |
128ea6c3 BD |
1419 | port->actor_port_aggregator_identifier = |
1420 | port->aggregator->aggregator_identifier; | |
1da177e4 | 1421 | |
3bf2d28a VF |
1422 | /* update the new aggregator's parameters |
1423 | * if port was responsed from the end-user | |
1424 | */ | |
cb8dda90 | 1425 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) |
7bfc4753 | 1426 | /* if port is full duplex */ |
1624db7b | 1427 | port->aggregator->is_individual = false; |
7bfc4753 | 1428 | else |
1624db7b | 1429 | port->aggregator->is_individual = true; |
1da177e4 LT |
1430 | |
1431 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1432 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1433 | port->aggregator->partner_system = |
1434 | port->partner_oper.system; | |
1435 | port->aggregator->partner_system_priority = | |
1436 | port->partner_oper.system_priority; | |
1055c9ab | 1437 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1438 | port->aggregator->receive_state = 1; |
1439 | port->aggregator->transmit_state = 1; | |
1440 | port->aggregator->lag_ports = port; | |
1441 | port->aggregator->num_of_ports++; | |
1442 | ||
3bf2d28a | 1443 | /* mark this port as selected */ |
1da177e4 LT |
1444 | port->sm_vars |= AD_PORT_SELECTED; |
1445 | ||
d4471f5e VF |
1446 | netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", |
1447 | port->actor_port_number, | |
1448 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1449 | } else { |
d4471f5e | 1450 | netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", |
1da177e4 LT |
1451 | port->actor_port_number, port->slave->dev->name); |
1452 | } | |
1453 | } | |
3bf2d28a VF |
1454 | /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE |
1455 | * in all aggregator's ports, else set ready=FALSE in all | |
1456 | * aggregator's ports | |
1457 | */ | |
1458 | __set_agg_ports_ready(port->aggregator, | |
1459 | __agg_ports_are_ready(port->aggregator)); | |
1da177e4 | 1460 | |
fd989c83 | 1461 | aggregator = __get_first_agg(port); |
ee637714 | 1462 | ad_agg_selection_logic(aggregator, update_slave_arr); |
63b46242 WK |
1463 | |
1464 | if (!port->aggregator->is_active) | |
1465 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
fd989c83 JV |
1466 | } |
1467 | ||
3bf2d28a | 1468 | /* Decide if "agg" is a better choice for the new active aggregator that |
fd989c83 JV |
1469 | * the current best, according to the ad_select policy. |
1470 | */ | |
1471 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1472 | struct aggregator *curr) | |
1473 | { | |
3bf2d28a | 1474 | /* 0. If no best, select current. |
fd989c83 JV |
1475 | * |
1476 | * 1. If the current agg is not individual, and the best is | |
1477 | * individual, select current. | |
1478 | * | |
1479 | * 2. If current agg is individual and the best is not, keep best. | |
1480 | * | |
1481 | * 3. Therefore, current and best are both individual or both not | |
1482 | * individual, so: | |
1483 | * | |
1484 | * 3a. If current agg partner replied, and best agg partner did not, | |
1485 | * select current. | |
1486 | * | |
1487 | * 3b. If current agg partner did not reply and best agg partner | |
1488 | * did reply, keep best. | |
1489 | * | |
1490 | * 4. Therefore, current and best both have partner replies or | |
1491 | * both do not, so perform selection policy: | |
1492 | * | |
1493 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1494 | * select by bandwidth. | |
1495 | * | |
1496 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1497 | */ | |
1498 | if (!best) | |
1499 | return curr; | |
1500 | ||
1501 | if (!curr->is_individual && best->is_individual) | |
1502 | return curr; | |
1503 | ||
1504 | if (curr->is_individual && !best->is_individual) | |
1505 | return best; | |
1506 | ||
1507 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1508 | return curr; | |
1509 | ||
1510 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1511 | return best; | |
1512 | ||
1513 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1514 | case BOND_AD_COUNT: | |
1515 | if (curr->num_of_ports > best->num_of_ports) | |
1516 | return curr; | |
1517 | ||
1518 | if (curr->num_of_ports < best->num_of_ports) | |
1519 | return best; | |
1520 | ||
1521 | /*FALLTHROUGH*/ | |
1522 | case BOND_AD_STABLE: | |
1523 | case BOND_AD_BANDWIDTH: | |
1524 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1525 | return curr; | |
1526 | ||
1527 | break; | |
1528 | ||
1529 | default: | |
d4471f5e VF |
1530 | net_warn_ratelimited("%s: Impossible agg select mode %d\n", |
1531 | curr->slave->bond->dev->name, | |
1532 | __get_agg_selection_mode(curr->lag_ports)); | |
fd989c83 | 1533 | break; |
1da177e4 | 1534 | } |
fd989c83 JV |
1535 | |
1536 | return best; | |
1da177e4 LT |
1537 | } |
1538 | ||
4cd6fe1c SH |
1539 | static int agg_device_up(const struct aggregator *agg) |
1540 | { | |
2430af8b | 1541 | struct port *port = agg->lag_ports; |
3bf2d28a | 1542 | |
2430af8b JB |
1543 | if (!port) |
1544 | return 0; | |
3bf2d28a VF |
1545 | |
1546 | return netif_running(port->slave->dev) && | |
1547 | netif_carrier_ok(port->slave->dev); | |
4cd6fe1c SH |
1548 | } |
1549 | ||
1da177e4 LT |
1550 | /** |
1551 | * ad_agg_selection_logic - select an aggregation group for a team | |
1552 | * @aggregator: the aggregator we're looking at | |
ee637714 | 1553 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1554 | * |
1555 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1556 | * |
1557 | * The logic of this function is to select the aggregator according to | |
1558 | * the ad_select policy: | |
1559 | * | |
1560 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1561 | * it, and to reselect the active aggregator only if the previous | |
1562 | * aggregator has no more ports related to it. | |
1563 | * | |
1564 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1565 | * bandwidth, and reselect whenever a link state change takes place or the | |
1566 | * set of slaves in the bond changes. | |
1567 | * | |
1568 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1569 | * (slaves), and reselect whenever a link state change takes place or the | |
1570 | * set of slaves in the bond changes. | |
1da177e4 LT |
1571 | * |
1572 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1573 | * __get_active_agg() won't work correctly. This function should be better | |
1574 | * called with the bond itself, and retrieve the first agg from it. | |
1575 | */ | |
ee637714 MB |
1576 | static void ad_agg_selection_logic(struct aggregator *agg, |
1577 | bool *update_slave_arr) | |
1da177e4 | 1578 | { |
fd989c83 | 1579 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1580 | struct bonding *bond = agg->slave->bond; |
1581 | struct list_head *iter; | |
1582 | struct slave *slave; | |
1da177e4 | 1583 | struct port *port; |
1da177e4 | 1584 | |
49b7624e | 1585 | rcu_read_lock(); |
fd989c83 | 1586 | origin = agg; |
fd989c83 | 1587 | active = __get_active_agg(agg); |
4cd6fe1c | 1588 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1589 | |
be79bd04 | 1590 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1591 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
bef1fcce | 1592 | |
fd989c83 JV |
1593 | agg->is_active = 0; |
1594 | ||
4cd6fe1c | 1595 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1596 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1597 | } |
fd989c83 JV |
1598 | |
1599 | if (best && | |
1600 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
3bf2d28a | 1601 | /* For the STABLE policy, don't replace the old active |
fd989c83 JV |
1602 | * aggregator if it's still active (it has an answering |
1603 | * partner) or if both the best and active don't have an | |
1604 | * answering partner. | |
1605 | */ | |
1606 | if (active && active->lag_ports && | |
1607 | active->lag_ports->is_enabled && | |
1608 | (__agg_has_partner(active) || | |
3bf2d28a VF |
1609 | (!__agg_has_partner(active) && |
1610 | !__agg_has_partner(best)))) { | |
fd989c83 JV |
1611 | if (!(!active->actor_oper_aggregator_key && |
1612 | best->actor_oper_aggregator_key)) { | |
1613 | best = NULL; | |
1614 | active->is_active = 1; | |
1da177e4 LT |
1615 | } |
1616 | } | |
fd989c83 | 1617 | } |
1da177e4 | 1618 | |
fd989c83 JV |
1619 | if (best && (best == active)) { |
1620 | best = NULL; | |
1621 | active->is_active = 1; | |
1da177e4 LT |
1622 | } |
1623 | ||
be79bd04 | 1624 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1625 | if (best) { |
d4471f5e VF |
1626 | netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1627 | best->aggregator_identifier, best->num_of_ports, | |
1628 | best->actor_oper_aggregator_key, | |
1629 | best->partner_oper_aggregator_key, | |
1630 | best->is_individual, best->is_active); | |
1631 | netdev_dbg(bond->dev, "best ports %p slave %p %s\n", | |
1632 | best->lag_ports, best->slave, | |
1633 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1634 | |
be79bd04 | 1635 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1636 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
fd989c83 | 1637 | |
d4471f5e VF |
1638 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1639 | agg->aggregator_identifier, agg->num_of_ports, | |
1640 | agg->actor_oper_aggregator_key, | |
1641 | agg->partner_oper_aggregator_key, | |
1642 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1643 | } |
1644 | ||
be79bd04 | 1645 | /* check if any partner replys */ |
fd989c83 | 1646 | if (best->is_individual) { |
d4471f5e VF |
1647 | net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
1648 | best->slave ? | |
1649 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1650 | } |
1651 | ||
fd989c83 | 1652 | best->is_active = 1; |
d4471f5e VF |
1653 | netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", |
1654 | best->aggregator_identifier); | |
1655 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1656 | best->aggregator_identifier, best->num_of_ports, | |
1657 | best->actor_oper_aggregator_key, | |
1658 | best->partner_oper_aggregator_key, | |
1659 | best->is_individual, best->is_active); | |
1da177e4 | 1660 | |
3bf2d28a VF |
1661 | /* disable the ports that were related to the former |
1662 | * active_aggregator | |
1663 | */ | |
fd989c83 JV |
1664 | if (active) { |
1665 | for (port = active->lag_ports; port; | |
1666 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1667 | __disable_port(port); |
1668 | } | |
1669 | } | |
ee637714 MB |
1670 | /* Slave array needs update. */ |
1671 | *update_slave_arr = true; | |
1da177e4 LT |
1672 | } |
1673 | ||
3bf2d28a | 1674 | /* if the selected aggregator is of join individuals |
fd989c83 JV |
1675 | * (partner_system is NULL), enable their ports |
1676 | */ | |
1677 | active = __get_active_agg(origin); | |
1da177e4 | 1678 | |
fd989c83 JV |
1679 | if (active) { |
1680 | if (!__agg_has_partner(active)) { | |
1681 | for (port = active->lag_ports; port; | |
1682 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1683 | __enable_port(port); |
1684 | } | |
1685 | } | |
1686 | } | |
fd989c83 | 1687 | |
be79bd04 | 1688 | rcu_read_unlock(); |
1689 | ||
bef1fcce | 1690 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1691 | } |
1692 | ||
1693 | /** | |
1694 | * ad_clear_agg - clear a given aggregator's parameters | |
1695 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1696 | */ |
1697 | static void ad_clear_agg(struct aggregator *aggregator) | |
1698 | { | |
1699 | if (aggregator) { | |
1624db7b | 1700 | aggregator->is_individual = false; |
1da177e4 LT |
1701 | aggregator->actor_admin_aggregator_key = 0; |
1702 | aggregator->actor_oper_aggregator_key = 0; | |
1703 | aggregator->partner_system = null_mac_addr; | |
1704 | aggregator->partner_system_priority = 0; | |
1705 | aggregator->partner_oper_aggregator_key = 0; | |
1706 | aggregator->receive_state = 0; | |
1707 | aggregator->transmit_state = 0; | |
1708 | aggregator->lag_ports = NULL; | |
1709 | aggregator->is_active = 0; | |
1710 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1711 | pr_debug("LAG %d was cleared\n", |
1712 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1713 | } |
1714 | } | |
1715 | ||
1716 | /** | |
1717 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1718 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1719 | */ |
1720 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1721 | { | |
1722 | if (aggregator) { | |
1723 | ad_clear_agg(aggregator); | |
1724 | ||
1725 | aggregator->aggregator_mac_address = null_mac_addr; | |
1726 | aggregator->aggregator_identifier = 0; | |
1727 | aggregator->slave = NULL; | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | /** | |
1732 | * ad_initialize_port - initialize a given port's parameters | |
1733 | * @aggregator: the aggregator we're looking at | |
1734 | * @lacp_fast: boolean. whether fast periodic should be used | |
1da177e4 LT |
1735 | */ |
1736 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1737 | { | |
c7e703d0 HE |
1738 | static const struct port_params tmpl = { |
1739 | .system_priority = 0xffff, | |
1740 | .key = 1, | |
1741 | .port_number = 1, | |
1742 | .port_priority = 0xff, | |
1743 | .port_state = 1, | |
1744 | }; | |
7addeef6 HE |
1745 | static const struct lacpdu lacpdu = { |
1746 | .subtype = 0x01, | |
1747 | .version_number = 0x01, | |
1748 | .tlv_type_actor_info = 0x01, | |
1749 | .actor_information_length = 0x14, | |
1750 | .tlv_type_partner_info = 0x02, | |
1751 | .partner_information_length = 0x14, | |
1752 | .tlv_type_collector_info = 0x03, | |
1753 | .collector_information_length = 0x10, | |
1754 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1755 | }; | |
c7e703d0 | 1756 | |
1da177e4 LT |
1757 | if (port) { |
1758 | port->actor_port_number = 1; | |
1759 | port->actor_port_priority = 0xff; | |
1760 | port->actor_system = null_mac_addr; | |
1761 | port->actor_system_priority = 0xffff; | |
1762 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1763 | port->ntt = false; |
1da177e4 LT |
1764 | port->actor_admin_port_key = 1; |
1765 | port->actor_oper_port_key = 1; | |
3bf2d28a VF |
1766 | port->actor_admin_port_state = AD_STATE_AGGREGATION | |
1767 | AD_STATE_LACP_ACTIVITY; | |
1768 | port->actor_oper_port_state = AD_STATE_AGGREGATION | | |
1769 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 | 1770 | |
7bfc4753 | 1771 | if (lacp_fast) |
1da177e4 | 1772 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1773 | |
c7e703d0 HE |
1774 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1775 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1776 | ||
f48127b6 | 1777 | port->is_enabled = true; |
3bf2d28a | 1778 | /* private parameters */ |
19a12049 | 1779 | port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1780 | port->sm_rx_state = 0; |
1781 | port->sm_rx_timer_counter = 0; | |
1782 | port->sm_periodic_state = 0; | |
1783 | port->sm_periodic_timer_counter = 0; | |
1784 | port->sm_mux_state = 0; | |
1785 | port->sm_mux_timer_counter = 0; | |
1786 | port->sm_tx_state = 0; | |
1787 | port->sm_tx_timer_counter = 0; | |
1788 | port->slave = NULL; | |
1789 | port->aggregator = NULL; | |
1790 | port->next_port_in_aggregator = NULL; | |
1791 | port->transaction_id = 0; | |
1792 | ||
14c9551a MB |
1793 | port->sm_churn_actor_timer_counter = 0; |
1794 | port->sm_churn_actor_state = 0; | |
1795 | port->churn_actor_count = 0; | |
1796 | port->sm_churn_partner_timer_counter = 0; | |
1797 | port->sm_churn_partner_state = 0; | |
1798 | port->churn_partner_count = 0; | |
1799 | ||
7addeef6 | 1800 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1801 | } |
1802 | } | |
1803 | ||
1804 | /** | |
1805 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1806 | * @port: the port we're looking at | |
ee637714 | 1807 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1808 | * |
1809 | * Enable @port if it's in an active aggregator | |
1810 | */ | |
ee637714 MB |
1811 | static void ad_enable_collecting_distributing(struct port *port, |
1812 | bool *update_slave_arr) | |
1da177e4 LT |
1813 | { |
1814 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1815 | pr_debug("Enabling port %d(LAG %d)\n", |
1816 | port->actor_port_number, | |
1817 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1818 | __enable_port(port); |
ee637714 MB |
1819 | /* Slave array needs update */ |
1820 | *update_slave_arr = true; | |
1da177e4 LT |
1821 | } |
1822 | } | |
1823 | ||
1824 | /** | |
1825 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1826 | * @port: the port we're looking at | |
ee637714 | 1827 | * @update_slave_arr: Does slave array need update? |
1da177e4 | 1828 | */ |
ee637714 MB |
1829 | static void ad_disable_collecting_distributing(struct port *port, |
1830 | bool *update_slave_arr) | |
1da177e4 | 1831 | { |
3bf2d28a VF |
1832 | if (port->aggregator && |
1833 | !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), | |
1834 | &(null_mac_addr))) { | |
a4aee5c8 JP |
1835 | pr_debug("Disabling port %d(LAG %d)\n", |
1836 | port->actor_port_number, | |
1837 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1838 | __disable_port(port); |
ee637714 MB |
1839 | /* Slave array needs an update */ |
1840 | *update_slave_arr = true; | |
1da177e4 LT |
1841 | } |
1842 | } | |
1843 | ||
1da177e4 LT |
1844 | /** |
1845 | * ad_marker_info_received - handle receive of a Marker information frame | |
1846 | * @marker_info: Marker info received | |
1847 | * @port: the port we're looking at | |
1da177e4 | 1848 | */ |
1c3f0b8e MD |
1849 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1850 | struct port *port) | |
1da177e4 | 1851 | { |
1c3f0b8e | 1852 | struct bond_marker marker; |
1da177e4 | 1853 | |
3bf2d28a | 1854 | /* copy the received marker data to the response marker */ |
1c3f0b8e | 1855 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
3bf2d28a | 1856 | /* change the marker subtype to marker response */ |
128ea6c3 | 1857 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 | 1858 | |
3bf2d28a | 1859 | /* send the marker response */ |
1da177e4 | 1860 | if (ad_marker_send(port, &marker) >= 0) { |
a4aee5c8 JP |
1861 | pr_debug("Sent Marker Response on port %d\n", |
1862 | port->actor_port_number); | |
1da177e4 LT |
1863 | } |
1864 | } | |
1865 | ||
1866 | /** | |
1867 | * ad_marker_response_received - handle receive of a marker response frame | |
1868 | * @marker: marker PDU received | |
1869 | * @port: the port we're looking at | |
1870 | * | |
1871 | * This function does nothing since we decided not to implement send and handle | |
1872 | * response for marker PDU's, in this stage, but only to respond to marker | |
1873 | * information. | |
1874 | */ | |
1c3f0b8e | 1875 | static void ad_marker_response_received(struct bond_marker *marker, |
3bf2d28a | 1876 | struct port *port) |
1da177e4 | 1877 | { |
3bf2d28a VF |
1878 | marker = NULL; |
1879 | port = NULL; | |
1880 | /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ | |
1da177e4 LT |
1881 | } |
1882 | ||
3bf2d28a | 1883 | /* ========= AD exported functions to the main bonding code ========= */ |
1da177e4 | 1884 | |
3bf2d28a | 1885 | /* Check aggregators status in team every T seconds */ |
1da177e4 LT |
1886 | #define AD_AGGREGATOR_SELECTION_TIMER 8 |
1887 | ||
3bf2d28a VF |
1888 | /** |
1889 | * bond_3ad_initiate_agg_selection - initate aggregator selection | |
1890 | * @bond: bonding struct | |
fd989c83 JV |
1891 | * |
1892 | * Set the aggregation selection timer, to initiate an agg selection in | |
1893 | * the very near future. Called during first initialization, and during | |
1894 | * any down to up transitions of the bond. | |
1895 | */ | |
1896 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1897 | { | |
1898 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1899 | } |
1900 | ||
1da177e4 LT |
1901 | /** |
1902 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1903 | * @bond: bonding struct to work on | |
1904 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1905 | * |
1906 | * Can be called only after the mac address of the bond is set. | |
1907 | */ | |
56d00c67 | 1908 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1909 | { |
815117ad | 1910 | /* check that the bond is not initialized yet */ |
1911 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
3a6d54c5 | 1912 | bond->dev->dev_addr)) { |
1da177e4 | 1913 | |
163c8ff3 | 1914 | BOND_AD_INFO(bond).aggregator_identifier = 0; |
1da177e4 | 1915 | |
1da177e4 LT |
1916 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1917 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1918 | ||
3bf2d28a VF |
1919 | /* initialize how many times this module is called in one |
1920 | * second (should be about every 100ms) | |
1921 | */ | |
1da177e4 LT |
1922 | ad_ticks_per_sec = tick_resolution; |
1923 | ||
fd989c83 JV |
1924 | bond_3ad_initiate_agg_selection(bond, |
1925 | AD_AGGREGATOR_SELECTION_TIMER * | |
1926 | ad_ticks_per_sec); | |
1da177e4 LT |
1927 | } |
1928 | } | |
1929 | ||
1930 | /** | |
1931 | * bond_3ad_bind_slave - initialize a slave's port | |
1932 | * @slave: slave struct to work on | |
1933 | * | |
1934 | * Returns: 0 on success | |
1935 | * < 0 on error | |
1936 | */ | |
359632e5 | 1937 | void bond_3ad_bind_slave(struct slave *slave) |
1da177e4 LT |
1938 | { |
1939 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1940 | struct port *port; | |
1941 | struct aggregator *aggregator; | |
1942 | ||
359632e5 | 1943 | /* check that the slave has not been initialized yet. */ |
3fdddd85 | 1944 | if (SLAVE_AD_INFO(slave)->port.slave != slave) { |
1da177e4 | 1945 | |
359632e5 | 1946 | /* port initialization */ |
3fdddd85 | 1947 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 1948 | |
bf0239a9 | 1949 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 LT |
1950 | |
1951 | port->slave = slave; | |
3fdddd85 | 1952 | port->actor_port_number = SLAVE_AD_INFO(slave)->id; |
359632e5 | 1953 | /* key is determined according to the link speed, duplex and user key(which |
1954 | * is yet not supported) | |
359632e5 | 1955 | */ |
3bf2d28a | 1956 | port->actor_admin_port_key = 0; |
1da177e4 LT |
1957 | port->actor_admin_port_key |= __get_duplex(port); |
1958 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1959 | port->actor_oper_port_key = port->actor_admin_port_key; | |
3bf2d28a VF |
1960 | /* if the port is not full duplex, then the port should be not |
1961 | * lacp Enabled | |
1962 | */ | |
cb8dda90 | 1963 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) |
1da177e4 | 1964 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
359632e5 | 1965 | /* actor system is the bond's system */ |
1da177e4 | 1966 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; |
3bf2d28a VF |
1967 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND |
1968 | * lacpdu's are sent in one second) | |
1969 | */ | |
1da177e4 LT |
1970 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
1971 | port->aggregator = NULL; | |
1972 | port->next_port_in_aggregator = NULL; | |
1973 | ||
1974 | __disable_port(port); | |
1da177e4 | 1975 | |
359632e5 | 1976 | /* aggregator initialization */ |
3fdddd85 | 1977 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 LT |
1978 | |
1979 | ad_initialize_agg(aggregator); | |
1980 | ||
1981 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
163c8ff3 | 1982 | aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; |
1da177e4 LT |
1983 | aggregator->slave = slave; |
1984 | aggregator->is_active = 0; | |
1985 | aggregator->num_of_ports = 0; | |
1986 | } | |
1da177e4 LT |
1987 | } |
1988 | ||
1989 | /** | |
1990 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1991 | * @slave: slave struct to work on | |
1992 | * | |
1993 | * Search for the aggregator that is related to this port, remove the | |
1994 | * aggregator and assign another aggregator for other port related to it | |
1995 | * (if any), and remove the port. | |
1996 | */ | |
1997 | void bond_3ad_unbind_slave(struct slave *slave) | |
1998 | { | |
1999 | struct port *port, *prev_port, *temp_port; | |
2000 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
2001 | int select_new_active_agg = 0; | |
0b088264 VF |
2002 | struct bonding *bond = slave->bond; |
2003 | struct slave *slave_iter; | |
2004 | struct list_head *iter; | |
ee637714 | 2005 | bool dummy_slave_update; /* Ignore this value as caller updates array */ |
a361c83c | 2006 | |
e470259f NA |
2007 | /* Sync against bond_3ad_state_machine_handler() */ |
2008 | spin_lock_bh(&bond->mode_lock); | |
3fdddd85 | 2009 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
2010 | port = &(SLAVE_AD_INFO(slave)->port); | |
1da177e4 | 2011 | |
3bf2d28a | 2012 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2013 | if (!port->slave) { |
d4471f5e VF |
2014 | netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", |
2015 | slave->dev->name); | |
e470259f | 2016 | goto out; |
1da177e4 LT |
2017 | } |
2018 | ||
d4471f5e VF |
2019 | netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", |
2020 | aggregator->aggregator_identifier); | |
1da177e4 LT |
2021 | |
2022 | /* Tell the partner that this port is not suitable for aggregation */ | |
2023 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
2024 | __update_lacpdu_from_port(port); | |
2025 | ad_lacpdu_send(port); | |
2026 | ||
3bf2d28a | 2027 | /* check if this aggregator is occupied */ |
1da177e4 | 2028 | if (aggregator->lag_ports) { |
3bf2d28a VF |
2029 | /* check if there are other ports related to this aggregator |
2030 | * except the port related to this slave(thats ensure us that | |
2031 | * there is a reason to search for new aggregator, and that we | |
2032 | * will find one | |
2033 | */ | |
2034 | if ((aggregator->lag_ports != port) || | |
2035 | (aggregator->lag_ports->next_port_in_aggregator)) { | |
2036 | /* find new aggregator for the related port(s) */ | |
0b088264 | 2037 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 2038 | new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
3bf2d28a VF |
2039 | /* if the new aggregator is empty, or it is |
2040 | * connected to our port only | |
2041 | */ | |
2042 | if (!new_aggregator->lag_ports || | |
2043 | ((new_aggregator->lag_ports == port) && | |
2044 | !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 2045 | break; |
1da177e4 | 2046 | } |
0b088264 VF |
2047 | if (!slave_iter) |
2048 | new_aggregator = NULL; | |
3bf2d28a VF |
2049 | |
2050 | /* if new aggregator found, copy the aggregator's | |
2051 | * parameters and connect the related lag_ports to the | |
2052 | * new aggregator | |
2053 | */ | |
1da177e4 | 2054 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { |
d4471f5e VF |
2055 | netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", |
2056 | aggregator->aggregator_identifier, | |
2057 | new_aggregator->aggregator_identifier); | |
1da177e4 | 2058 | |
3bf2d28a VF |
2059 | if ((new_aggregator->lag_ports == port) && |
2060 | new_aggregator->is_active) { | |
d4471f5e | 2061 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
1da177e4 LT |
2062 | select_new_active_agg = 1; |
2063 | } | |
2064 | ||
2065 | new_aggregator->is_individual = aggregator->is_individual; | |
2066 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
2067 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
2068 | new_aggregator->partner_system = aggregator->partner_system; | |
2069 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
2070 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
2071 | new_aggregator->receive_state = aggregator->receive_state; | |
2072 | new_aggregator->transmit_state = aggregator->transmit_state; | |
2073 | new_aggregator->lag_ports = aggregator->lag_ports; | |
2074 | new_aggregator->is_active = aggregator->is_active; | |
2075 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
2076 | ||
3bf2d28a VF |
2077 | /* update the information that is written on |
2078 | * the ports about the aggregator | |
2079 | */ | |
128ea6c3 BD |
2080 | for (temp_port = aggregator->lag_ports; temp_port; |
2081 | temp_port = temp_port->next_port_in_aggregator) { | |
2082 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
2083 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
2084 | } | |
2085 | ||
1da177e4 | 2086 | ad_clear_agg(aggregator); |
a361c83c | 2087 | |
7bfc4753 | 2088 | if (select_new_active_agg) |
ee637714 MB |
2089 | ad_agg_selection_logic(__get_first_agg(port), |
2090 | &dummy_slave_update); | |
1da177e4 | 2091 | } else { |
d4471f5e | 2092 | netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); |
1da177e4 | 2093 | } |
3bf2d28a VF |
2094 | } else { |
2095 | /* in case that the only port related to this | |
2096 | * aggregator is the one we want to remove | |
2097 | */ | |
1da177e4 | 2098 | select_new_active_agg = aggregator->is_active; |
1da177e4 LT |
2099 | ad_clear_agg(aggregator); |
2100 | if (select_new_active_agg) { | |
d4471f5e | 2101 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 2102 | /* select new active aggregator */ |
74684493 VF |
2103 | temp_aggregator = __get_first_agg(port); |
2104 | if (temp_aggregator) | |
ee637714 MB |
2105 | ad_agg_selection_logic(temp_aggregator, |
2106 | &dummy_slave_update); | |
1da177e4 LT |
2107 | } |
2108 | } | |
2109 | } | |
2110 | ||
d4471f5e | 2111 | netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); |
3bf2d28a VF |
2112 | |
2113 | /* find the aggregator that this port is connected to */ | |
0b088264 | 2114 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 2115 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
1da177e4 | 2116 | prev_port = NULL; |
3bf2d28a | 2117 | /* search the port in the aggregator's related ports */ |
128ea6c3 BD |
2118 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2119 | prev_port = temp_port, | |
3bf2d28a VF |
2120 | temp_port = temp_port->next_port_in_aggregator) { |
2121 | if (temp_port == port) { | |
2122 | /* the aggregator found - detach the port from | |
2123 | * this aggregator | |
2124 | */ | |
7bfc4753 | 2125 | if (prev_port) |
1da177e4 | 2126 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2127 | else |
1da177e4 | 2128 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2129 | temp_aggregator->num_of_ports--; |
128ea6c3 | 2130 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 | 2131 | select_new_active_agg = temp_aggregator->is_active; |
1da177e4 LT |
2132 | ad_clear_agg(temp_aggregator); |
2133 | if (select_new_active_agg) { | |
d4471f5e | 2134 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 2135 | /* select new active aggregator */ |
ee637714 MB |
2136 | ad_agg_selection_logic(__get_first_agg(port), |
2137 | &dummy_slave_update); | |
1da177e4 LT |
2138 | } |
2139 | } | |
2140 | break; | |
2141 | } | |
2142 | } | |
2143 | } | |
128ea6c3 | 2144 | port->slave = NULL; |
e470259f NA |
2145 | |
2146 | out: | |
2147 | spin_unlock_bh(&bond->mode_lock); | |
1da177e4 LT |
2148 | } |
2149 | ||
2150 | /** | |
2151 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2152 | * @bond: bonding struct to work on | |
2153 | * | |
2154 | * The state machine handling concept in this module is to check every tick | |
2155 | * which state machine should operate any function. The execution order is | |
2156 | * round robin, so when we have an interaction between state machines, the | |
2157 | * reply of one to each other might be delayed until next tick. | |
2158 | * | |
2159 | * This function also complete the initialization when the agg_select_timer | |
2160 | * times out, and it selects an aggregator for the ports that are yet not | |
2161 | * related to any aggregator, and selects the active aggregator for a bond. | |
2162 | */ | |
1b76b316 | 2163 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2164 | { |
1b76b316 JV |
2165 | struct bonding *bond = container_of(work, struct bonding, |
2166 | ad_work.work); | |
1da177e4 | 2167 | struct aggregator *aggregator; |
3c4c88a1 VF |
2168 | struct list_head *iter; |
2169 | struct slave *slave; | |
2170 | struct port *port; | |
5e5b0665 | 2171 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
ee637714 | 2172 | bool update_slave_arr = false; |
1da177e4 | 2173 | |
e470259f NA |
2174 | /* Lock to protect data accessed by all (e.g., port->sm_vars) and |
2175 | * against running with bond_3ad_unbind_slave. ad_rx_machine may run | |
2176 | * concurrently due to incoming LACPDU as well. | |
2177 | */ | |
b7435628 | 2178 | spin_lock_bh(&bond->mode_lock); |
be79bd04 | 2179 | rcu_read_lock(); |
1f2cd845 | 2180 | |
be79bd04 | 2181 | /* check if there are any slaves */ |
0965a1f3 | 2182 | if (!bond_has_slaves(bond)) |
1da177e4 | 2183 | goto re_arm; |
1da177e4 | 2184 | |
be79bd04 | 2185 | /* check if agg_select_timer timer after initialize is timed out */ |
3bf2d28a VF |
2186 | if (BOND_AD_INFO(bond).agg_select_timer && |
2187 | !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
be79bd04 | 2188 | slave = bond_first_slave_rcu(bond); |
3fdddd85 | 2189 | port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; |
fe9323da | 2190 | |
be79bd04 | 2191 | /* select the active aggregator for the bond */ |
fe9323da | 2192 | if (port) { |
1da177e4 | 2193 | if (!port->slave) { |
d4471f5e VF |
2194 | net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", |
2195 | bond->dev->name); | |
1da177e4 LT |
2196 | goto re_arm; |
2197 | } | |
2198 | ||
2199 | aggregator = __get_first_agg(port); | |
ee637714 | 2200 | ad_agg_selection_logic(aggregator, &update_slave_arr); |
1da177e4 | 2201 | } |
f0c76d61 | 2202 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2203 | } |
2204 | ||
be79bd04 | 2205 | /* for each port run the state machines */ |
2206 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3fdddd85 | 2207 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2208 | if (!port->slave) { |
d4471f5e | 2209 | net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", |
86a2b9cf | 2210 | bond->dev->name); |
1da177e4 LT |
2211 | goto re_arm; |
2212 | } | |
2213 | ||
2214 | ad_rx_machine(NULL, port); | |
2215 | ad_periodic_machine(port); | |
ee637714 MB |
2216 | ad_port_selection_logic(port, &update_slave_arr); |
2217 | ad_mux_machine(port, &update_slave_arr); | |
1da177e4 | 2218 | ad_tx_machine(port); |
14c9551a | 2219 | ad_churn_machine(port); |
1da177e4 | 2220 | |
be79bd04 | 2221 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2222 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2223 | port->sm_vars &= ~AD_PORT_BEGIN; |
1da177e4 LT |
2224 | } |
2225 | ||
2226 | re_arm: | |
5e5b0665 | 2227 | bond_for_each_slave_rcu(bond, slave, iter) { |
2228 | if (slave->should_notify) { | |
2229 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2230 | break; | |
2231 | } | |
2232 | } | |
be79bd04 | 2233 | rcu_read_unlock(); |
b7435628 | 2234 | spin_unlock_bh(&bond->mode_lock); |
5e5b0665 | 2235 | |
ee637714 MB |
2236 | if (update_slave_arr) |
2237 | bond_slave_arr_work_rearm(bond, 0); | |
2238 | ||
5e5b0665 | 2239 | if (should_notify_rtnl && rtnl_trylock()) { |
b0929915 | 2240 | bond_slave_state_notify(bond); |
5e5b0665 | 2241 | rtnl_unlock(); |
2242 | } | |
be79bd04 | 2243 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2244 | } |
2245 | ||
2246 | /** | |
2247 | * bond_3ad_rx_indication - handle a received frame | |
2248 | * @lacpdu: received lacpdu | |
2249 | * @slave: slave struct to work on | |
2250 | * @length: length of the data received | |
2251 | * | |
2252 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2253 | * received frames (loopback). Since only the payload is given to this | |
2254 | * function, it check for loopback. | |
2255 | */ | |
3bf2d28a VF |
2256 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, |
2257 | u16 length) | |
1da177e4 LT |
2258 | { |
2259 | struct port *port; | |
13a8e0c8 | 2260 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2261 | |
2262 | if (length >= sizeof(struct lacpdu)) { | |
2263 | ||
3fdddd85 | 2264 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2265 | |
2266 | if (!port->slave) { | |
d4471f5e VF |
2267 | net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", |
2268 | slave->dev->name, slave->bond->dev->name); | |
13a8e0c8 | 2269 | return ret; |
1da177e4 LT |
2270 | } |
2271 | ||
2272 | switch (lacpdu->subtype) { | |
2273 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2274 | ret = RX_HANDLER_CONSUMED; |
2f637324 SA |
2275 | netdev_dbg(slave->bond->dev, |
2276 | "Received LACPDU on port %d slave %s\n", | |
2277 | port->actor_port_number, | |
2278 | slave->dev->name); | |
16d79d7d | 2279 | /* Protect against concurrent state machines */ |
e470259f | 2280 | spin_lock(&slave->bond->mode_lock); |
1da177e4 | 2281 | ad_rx_machine(lacpdu, port); |
e470259f | 2282 | spin_unlock(&slave->bond->mode_lock); |
1da177e4 LT |
2283 | break; |
2284 | ||
2285 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2286 | ret = RX_HANDLER_CONSUMED; |
3bf2d28a VF |
2287 | /* No need to convert fields to Little Endian since we |
2288 | * don't use the marker's fields. | |
2289 | */ | |
1da177e4 | 2290 | |
1c3f0b8e | 2291 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2292 | case AD_MARKER_INFORMATION_SUBTYPE: |
d4471f5e VF |
2293 | netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", |
2294 | port->actor_port_number); | |
1c3f0b8e | 2295 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2296 | break; |
2297 | ||
2298 | case AD_MARKER_RESPONSE_SUBTYPE: | |
d4471f5e VF |
2299 | netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", |
2300 | port->actor_port_number); | |
1c3f0b8e | 2301 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2302 | break; |
2303 | ||
2304 | default: | |
d4471f5e VF |
2305 | netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", |
2306 | port->actor_port_number); | |
1da177e4 LT |
2307 | } |
2308 | } | |
2309 | } | |
13a8e0c8 | 2310 | return ret; |
1da177e4 LT |
2311 | } |
2312 | ||
2313 | /** | |
2314 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2315 | * @slave: slave struct to work on | |
2316 | * | |
2317 | * Handle reselection of aggregator (if needed) for this port. | |
2318 | */ | |
2319 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2320 | { | |
2321 | struct port *port; | |
2322 | ||
3fdddd85 | 2323 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2324 | |
71a06c59 | 2325 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2326 | if (!port->slave) { |
d4471f5e VF |
2327 | netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", |
2328 | slave->dev->name); | |
1da177e4 LT |
2329 | return; |
2330 | } | |
2331 | ||
e470259f | 2332 | spin_lock_bh(&slave->bond->mode_lock); |
71a06c59 | 2333 | |
cb8dda90 | 2334 | port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS; |
128ea6c3 BD |
2335 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2336 | (__get_link_speed(port) << 1); | |
d4471f5e | 2337 | netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); |
71a06c59 | 2338 | /* there is no need to reselect a new aggregator, just signal the |
2339 | * state machines to reinitialize | |
2340 | */ | |
1da177e4 | 2341 | port->sm_vars |= AD_PORT_BEGIN; |
71a06c59 | 2342 | |
e470259f | 2343 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2344 | } |
2345 | ||
2346 | /** | |
2347 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2348 | * @slave: slave struct to work on | |
2349 | * | |
2350 | * Handle reselection of aggregator (if needed) for this port. | |
2351 | */ | |
2352 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2353 | { | |
2354 | struct port *port; | |
2355 | ||
3fdddd85 | 2356 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2357 | |
bca44a73 | 2358 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2359 | if (!port->slave) { |
d4471f5e VF |
2360 | netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", |
2361 | slave->dev->name); | |
1da177e4 LT |
2362 | return; |
2363 | } | |
2364 | ||
e470259f | 2365 | spin_lock_bh(&slave->bond->mode_lock); |
bca44a73 | 2366 | |
cb8dda90 | 2367 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; |
128ea6c3 BD |
2368 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2369 | __get_duplex(port); | |
2f637324 SA |
2370 | netdev_dbg(slave->bond->dev, "Port %d slave %s changed duplex\n", |
2371 | port->actor_port_number, slave->dev->name); | |
2372 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) | |
2373 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
bca44a73 | 2374 | /* there is no need to reselect a new aggregator, just signal the |
2375 | * state machines to reinitialize | |
2376 | */ | |
1da177e4 | 2377 | port->sm_vars |= AD_PORT_BEGIN; |
bca44a73 | 2378 | |
e470259f | 2379 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2380 | } |
2381 | ||
2382 | /** | |
2383 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2384 | * @slave: slave struct to work on | |
2385 | * @status: whether the link is now up or down | |
2386 | * | |
2387 | * Handle reselection of aggregator (if needed) for this port. | |
2388 | */ | |
2389 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2390 | { | |
2391 | struct port *port; | |
2392 | ||
3fdddd85 | 2393 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2394 | |
108db736 | 2395 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2396 | if (!port->slave) { |
d4471f5e VF |
2397 | netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", |
2398 | slave->dev->name); | |
1da177e4 LT |
2399 | return; |
2400 | } | |
2401 | ||
e470259f | 2402 | spin_lock_bh(&slave->bond->mode_lock); |
108db736 | 2403 | /* on link down we are zeroing duplex and speed since |
2404 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2405 | * instead of N/A(duplex) / 0(speed). | |
2406 | * | |
2407 | * on link up we are forcing recheck on the duplex and speed since | |
2408 | * some of he adaptors(ce1000.lan) report. | |
2409 | */ | |
1da177e4 | 2410 | if (link == BOND_LINK_UP) { |
f48127b6 | 2411 | port->is_enabled = true; |
cb8dda90 | 2412 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; |
128ea6c3 BD |
2413 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2414 | __get_duplex(port); | |
cb8dda90 | 2415 | port->actor_admin_port_key &= ~AD_SPEED_KEY_MASKS; |
128ea6c3 BD |
2416 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2417 | (__get_link_speed(port) << 1); | |
f6a69a8f MB |
2418 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) |
2419 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
1da177e4 LT |
2420 | } else { |
2421 | /* link has failed */ | |
f48127b6 | 2422 | port->is_enabled = false; |
cb8dda90 | 2423 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_MASKS; |
128ea6c3 | 2424 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
cb8dda90 | 2425 | ~AD_SPEED_KEY_MASKS); |
f6a69a8f | 2426 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
1da177e4 | 2427 | } |
d4471f5e VF |
2428 | netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", |
2429 | port->actor_port_number, | |
2430 | link == BOND_LINK_UP ? "UP" : "DOWN"); | |
108db736 | 2431 | /* there is no need to reselect a new aggregator, just signal the |
2432 | * state machines to reinitialize | |
2433 | */ | |
1da177e4 | 2434 | port->sm_vars |= AD_PORT_BEGIN; |
108db736 | 2435 | |
e470259f | 2436 | spin_unlock_bh(&slave->bond->mode_lock); |
ee637714 MB |
2437 | |
2438 | /* RTNL is held and mode_lock is released so it's safe | |
2439 | * to update slave_array here. | |
2440 | */ | |
2441 | bond_update_slave_arr(slave->bond, NULL); | |
1da177e4 LT |
2442 | } |
2443 | ||
3bf2d28a VF |
2444 | /** |
2445 | * bond_3ad_set_carrier - set link state for bonding master | |
2446 | * @bond - bonding structure | |
2447 | * | |
2448 | * if we have an active aggregator, we're up, if not, we're down. | |
2449 | * Presumes that we cannot have an active aggregator if there are | |
2450 | * no slaves with link up. | |
ff59c456 | 2451 | * |
031ae4de JV |
2452 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2453 | * | |
ff59c456 JV |
2454 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2455 | * change, nonzero if it does. | |
2456 | */ | |
2457 | int bond_3ad_set_carrier(struct bonding *bond) | |
2458 | { | |
655f8919 | 2459 | struct aggregator *active; |
dec1e90e | 2460 | struct slave *first_slave; |
c1bc9644 | 2461 | int ret = 1; |
655f8919 | 2462 | |
be79bd04 | 2463 | rcu_read_lock(); |
2464 | first_slave = bond_first_slave_rcu(bond); | |
c1bc9644 VF |
2465 | if (!first_slave) { |
2466 | ret = 0; | |
2467 | goto out; | |
2468 | } | |
3fdddd85 | 2469 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); |
655f8919 | 2470 | if (active) { |
2471 | /* are enough slaves available to consider link up? */ | |
2472 | if (active->num_of_ports < bond->params.min_links) { | |
2473 | if (netif_carrier_ok(bond->dev)) { | |
2474 | netif_carrier_off(bond->dev); | |
c1bc9644 | 2475 | goto out; |
655f8919 | 2476 | } |
2477 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 | 2478 | netif_carrier_on(bond->dev); |
c1bc9644 | 2479 | goto out; |
ff59c456 | 2480 | } |
c1bc9644 | 2481 | } else if (netif_carrier_ok(bond->dev)) { |
ff59c456 | 2482 | netif_carrier_off(bond->dev); |
ff59c456 | 2483 | } |
c1bc9644 VF |
2484 | out: |
2485 | rcu_read_unlock(); | |
2486 | return ret; | |
ff59c456 JV |
2487 | } |
2488 | ||
1da177e4 | 2489 | /** |
318debd8 | 2490 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2491 | * @bond: bonding struct to work on |
2492 | * @ad_info: ad_info struct to fill with the bond's info | |
2493 | * | |
2494 | * Returns: 0 on success | |
2495 | * < 0 on error | |
2496 | */ | |
318debd8 | 2497 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2498 | struct ad_info *ad_info) | |
1da177e4 LT |
2499 | { |
2500 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2501 | struct list_head *iter; |
2502 | struct slave *slave; | |
1da177e4 LT |
2503 | struct port *port; |
2504 | ||
47e91f56 | 2505 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2506 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2507 | if (port->aggregator && port->aggregator->is_active) { |
2508 | aggregator = port->aggregator; | |
2509 | break; | |
2510 | } | |
2511 | } | |
2512 | ||
21f374c6 JP |
2513 | if (!aggregator) |
2514 | return -1; | |
2515 | ||
2516 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2517 | ad_info->ports = aggregator->num_of_ports; | |
2518 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2519 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2520 | ether_addr_copy(ad_info->partner_system, | |
2521 | aggregator->partner_system.mac_addr_value); | |
2522 | return 0; | |
1da177e4 LT |
2523 | } |
2524 | ||
318debd8 | 2525 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
2526 | { | |
2527 | int ret; | |
2528 | ||
47e91f56 | 2529 | rcu_read_lock(); |
318debd8 | 2530 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2531 | rcu_read_unlock(); |
318debd8 | 2532 | |
2533 | return ret; | |
2534 | } | |
2535 | ||
de063b70 ED |
2536 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2537 | struct slave *slave) | |
1da177e4 | 2538 | { |
de063b70 ED |
2539 | struct lacpdu *lacpdu, _lacpdu; |
2540 | ||
3aba891d | 2541 | if (skb->protocol != PKT_TYPE_LACPDU) |
86e74986 | 2542 | return RX_HANDLER_ANOTHER; |
b3053251 | 2543 | |
bb54e589 MB |
2544 | if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) |
2545 | return RX_HANDLER_ANOTHER; | |
2546 | ||
de063b70 ED |
2547 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2548 | if (!lacpdu) | |
86e74986 | 2549 | return RX_HANDLER_ANOTHER; |
ab12811c | 2550 | |
86e74986 | 2551 | return bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2552 | } |
ba824a8b | 2553 | |
3bf2d28a VF |
2554 | /** |
2555 | * bond_3ad_update_lacp_rate - change the lacp rate | |
2556 | * @bond - bonding struct | |
2557 | * | |
ba824a8b PP |
2558 | * When modify lacp_rate parameter via sysfs, |
2559 | * update actor_oper_port_state of each port. | |
2560 | * | |
e470259f | 2561 | * Hold bond->mode_lock, |
ba824a8b PP |
2562 | * so we can modify port->actor_oper_port_state, |
2563 | * no matter bond is up or down. | |
2564 | */ | |
2565 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2566 | { | |
ba824a8b | 2567 | struct port *port = NULL; |
9caff1e7 | 2568 | struct list_head *iter; |
c509316b | 2569 | struct slave *slave; |
ba824a8b PP |
2570 | int lacp_fast; |
2571 | ||
ba824a8b | 2572 | lacp_fast = bond->params.lacp_fast; |
e470259f | 2573 | spin_lock_bh(&bond->mode_lock); |
9caff1e7 | 2574 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 2575 | port = &(SLAVE_AD_INFO(slave)->port); |
ba824a8b PP |
2576 | if (lacp_fast) |
2577 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2578 | else | |
2579 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
ba824a8b | 2580 | } |
e470259f | 2581 | spin_unlock_bh(&bond->mode_lock); |
ba824a8b | 2582 | } |