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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) | |
d22a5fc0 MB |
78 | * -------------------------------------------------------------- |
79 | * Port key | User key (10 bits) | Speed (5 bits) | Duplex| | |
80 | * -------------------------------------------------------------- | |
81 | * |15 6|5 1|0 | |
3bf2d28a | 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 | 92 | AD_LINK_SPEED_2500MBPS, |
c7c55067 | 93 | AD_LINK_SPEED_5000MBPS, |
424c3232 | 94 | AD_LINK_SPEED_10000MBPS, |
3fcd64cf | 95 | AD_LINK_SPEED_14000MBPS, |
424c3232 | 96 | AD_LINK_SPEED_20000MBPS, |
19ddde1e | 97 | AD_LINK_SPEED_25000MBPS, |
424c3232 | 98 | AD_LINK_SPEED_40000MBPS, |
c7c55067 | 99 | AD_LINK_SPEED_50000MBPS, |
3952af4d JP |
100 | AD_LINK_SPEED_56000MBPS, |
101 | AD_LINK_SPEED_100000MBPS, | |
cb8dda90 | 102 | }; |
1da177e4 | 103 | |
815117ad | 104 | /* compare MAC addresses */ |
105 | #define MAC_ADDRESS_EQUAL(A, B) \ | |
106 | ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) | |
1da177e4 | 107 | |
f87fda00 ED |
108 | static const u8 null_mac_addr[ETH_ALEN + 2] __long_aligned = { |
109 | 0, 0, 0, 0, 0, 0 | |
110 | }; | |
1da177e4 LT |
111 | static u16 ad_ticks_per_sec; |
112 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
113 | ||
f87fda00 ED |
114 | static const u8 lacpdu_mcast_addr[ETH_ALEN + 2] __long_aligned = |
115 | MULTICAST_LACPDU_ADDR; | |
e4ac4320 | 116 | |
3bf2d28a | 117 | /* ================= main 802.3ad protocol functions ================== */ |
1da177e4 | 118 | static int ad_lacpdu_send(struct port *port); |
1c3f0b8e | 119 | static int ad_marker_send(struct port *port, struct bond_marker *marker); |
ee637714 | 120 | static void ad_mux_machine(struct port *port, bool *update_slave_arr); |
1da177e4 LT |
121 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); |
122 | static void ad_tx_machine(struct port *port); | |
123 | static void ad_periodic_machine(struct port *port); | |
ee637714 MB |
124 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); |
125 | static void ad_agg_selection_logic(struct aggregator *aggregator, | |
126 | bool *update_slave_arr); | |
1da177e4 LT |
127 | static void ad_clear_agg(struct aggregator *aggregator); |
128 | static void ad_initialize_agg(struct aggregator *aggregator); | |
129 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
ee637714 MB |
130 | static void ad_enable_collecting_distributing(struct port *port, |
131 | bool *update_slave_arr); | |
132 | static void ad_disable_collecting_distributing(struct port *port, | |
133 | bool *update_slave_arr); | |
3bf2d28a VF |
134 | static void ad_marker_info_received(struct bond_marker *marker_info, |
135 | struct port *port); | |
136 | static void ad_marker_response_received(struct bond_marker *marker, | |
137 | struct port *port); | |
7bb11dc9 | 138 | static void ad_update_actor_keys(struct port *port, bool reset); |
1da177e4 LT |
139 | |
140 | ||
3bf2d28a | 141 | /* ================= api to bonding and kernel code ================== */ |
1da177e4 LT |
142 | |
143 | /** | |
144 | * __get_bond_by_port - get the port's bonding struct | |
145 | * @port: the port we're looking at | |
146 | * | |
147 | * Return @port's bonding struct, or %NULL if it can't be found. | |
148 | */ | |
149 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
150 | { | |
7bfc4753 | 151 | if (port->slave == NULL) |
1da177e4 | 152 | return NULL; |
1da177e4 LT |
153 | |
154 | return bond_get_bond_by_slave(port->slave); | |
155 | } | |
156 | ||
1da177e4 LT |
157 | /** |
158 | * __get_first_agg - get the first aggregator in the bond | |
159 | * @bond: the bond we're looking at | |
160 | * | |
161 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
162 | * found. | |
768b9549 | 163 | * The caller must hold RCU or RTNL lock. |
1da177e4 LT |
164 | */ |
165 | static inline struct aggregator *__get_first_agg(struct port *port) | |
166 | { | |
167 | struct bonding *bond = __get_bond_by_port(port); | |
dec1e90e | 168 | struct slave *first_slave; |
768b9549 | 169 | struct aggregator *agg; |
1da177e4 | 170 | |
be79bd04 | 171 | /* If there's no bond for this port, or bond has no slaves */ |
dec1e90e | 172 | if (bond == NULL) |
1da177e4 | 173 | return NULL; |
3bf2d28a | 174 | |
be79bd04 | 175 | rcu_read_lock(); |
176 | first_slave = bond_first_slave_rcu(bond); | |
3fdddd85 | 177 | agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; |
be79bd04 | 178 | rcu_read_unlock(); |
3bf2d28a | 179 | |
768b9549 | 180 | return agg; |
1da177e4 LT |
181 | } |
182 | ||
3bf2d28a VF |
183 | /** |
184 | * __agg_has_partner - see if we have a partner | |
185 | * @agg: the agregator we're looking at | |
fd989c83 JV |
186 | * |
187 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
3bf2d28a | 188 | * address for the partner). Return 0 if not. |
fd989c83 JV |
189 | */ |
190 | static inline int __agg_has_partner(struct aggregator *agg) | |
191 | { | |
192 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
193 | } | |
194 | ||
1da177e4 LT |
195 | /** |
196 | * __disable_port - disable the port's slave | |
197 | * @port: the port we're looking at | |
1da177e4 LT |
198 | */ |
199 | static inline void __disable_port(struct port *port) | |
200 | { | |
5e5b0665 | 201 | bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
202 | } |
203 | ||
204 | /** | |
205 | * __enable_port - enable the port's slave, if it's up | |
206 | * @port: the port we're looking at | |
1da177e4 LT |
207 | */ |
208 | static inline void __enable_port(struct port *port) | |
209 | { | |
210 | struct slave *slave = port->slave; | |
211 | ||
b6adc610 | 212 | if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) |
5e5b0665 | 213 | bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
214 | } |
215 | ||
216 | /** | |
217 | * __port_is_enabled - check if the port's slave is in active state | |
218 | * @port: the port we're looking at | |
1da177e4 LT |
219 | */ |
220 | static inline int __port_is_enabled(struct port *port) | |
221 | { | |
e30bc066 | 222 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
223 | } |
224 | ||
225 | /** | |
226 | * __get_agg_selection_mode - get the aggregator selection mode | |
227 | * @port: the port we're looking at | |
228 | * | |
fd989c83 | 229 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
230 | */ |
231 | static inline u32 __get_agg_selection_mode(struct port *port) | |
232 | { | |
233 | struct bonding *bond = __get_bond_by_port(port); | |
234 | ||
7bfc4753 | 235 | if (bond == NULL) |
fd989c83 | 236 | return BOND_AD_STABLE; |
1da177e4 | 237 | |
1a14fbcb | 238 | return bond->params.ad_select; |
1da177e4 LT |
239 | } |
240 | ||
241 | /** | |
242 | * __check_agg_selection_timer - check if the selection timer has expired | |
243 | * @port: the port we're looking at | |
1da177e4 LT |
244 | */ |
245 | static inline int __check_agg_selection_timer(struct port *port) | |
246 | { | |
247 | struct bonding *bond = __get_bond_by_port(port); | |
248 | ||
7bfc4753 | 249 | if (bond == NULL) |
1da177e4 | 250 | return 0; |
1da177e4 LT |
251 | |
252 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
253 | } | |
254 | ||
1da177e4 LT |
255 | /** |
256 | * __get_link_speed - get a port's speed | |
257 | * @port: the port we're looking at | |
258 | * | |
cb8dda90 | 259 | * Return @port's speed in 802.3ad enum format. i.e. one of: |
1da177e4 | 260 | * 0, |
cb8dda90 JX |
261 | * %AD_LINK_SPEED_10MBPS, |
262 | * %AD_LINK_SPEED_100MBPS, | |
263 | * %AD_LINK_SPEED_1000MBPS, | |
424c3232 | 264 | * %AD_LINK_SPEED_2500MBPS, |
c7c55067 | 265 | * %AD_LINK_SPEED_5000MBPS, |
cb8dda90 | 266 | * %AD_LINK_SPEED_10000MBPS |
3fcd64cf | 267 | * %AD_LINK_SPEED_14000MBPS, |
424c3232 | 268 | * %AD_LINK_SPEED_20000MBPS |
19ddde1e | 269 | * %AD_LINK_SPEED_25000MBPS |
424c3232 | 270 | * %AD_LINK_SPEED_40000MBPS |
c7c55067 | 271 | * %AD_LINK_SPEED_50000MBPS |
424c3232 | 272 | * %AD_LINK_SPEED_56000MBPS |
3952af4d | 273 | * %AD_LINK_SPEED_100000MBPS |
1da177e4 LT |
274 | */ |
275 | static u16 __get_link_speed(struct port *port) | |
276 | { | |
277 | struct slave *slave = port->slave; | |
278 | u16 speed; | |
279 | ||
3bf2d28a VF |
280 | /* this if covers only a special case: when the configuration starts |
281 | * with link down, it sets the speed to 0. | |
282 | * This is done in spite of the fact that the e100 driver reports 0 | |
283 | * to be compatible with MVT in the future. | |
284 | */ | |
7bfc4753 | 285 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 286 | speed = 0; |
7bfc4753 | 287 | else { |
1da177e4 LT |
288 | switch (slave->speed) { |
289 | case SPEED_10: | |
cb8dda90 | 290 | speed = AD_LINK_SPEED_10MBPS; |
1da177e4 LT |
291 | break; |
292 | ||
293 | case SPEED_100: | |
cb8dda90 | 294 | speed = AD_LINK_SPEED_100MBPS; |
1da177e4 LT |
295 | break; |
296 | ||
297 | case SPEED_1000: | |
cb8dda90 | 298 | speed = AD_LINK_SPEED_1000MBPS; |
1da177e4 LT |
299 | break; |
300 | ||
424c3232 JX |
301 | case SPEED_2500: |
302 | speed = AD_LINK_SPEED_2500MBPS; | |
303 | break; | |
304 | ||
c7c55067 TC |
305 | case SPEED_5000: |
306 | speed = AD_LINK_SPEED_5000MBPS; | |
307 | break; | |
308 | ||
94dbffd5 | 309 | case SPEED_10000: |
cb8dda90 | 310 | speed = AD_LINK_SPEED_10000MBPS; |
94dbffd5 JV |
311 | break; |
312 | ||
3fcd64cf ND |
313 | case SPEED_14000: |
314 | speed = AD_LINK_SPEED_14000MBPS; | |
315 | break; | |
316 | ||
424c3232 JX |
317 | case SPEED_20000: |
318 | speed = AD_LINK_SPEED_20000MBPS; | |
319 | break; | |
320 | ||
19ddde1e JW |
321 | case SPEED_25000: |
322 | speed = AD_LINK_SPEED_25000MBPS; | |
323 | break; | |
324 | ||
424c3232 JX |
325 | case SPEED_40000: |
326 | speed = AD_LINK_SPEED_40000MBPS; | |
327 | break; | |
328 | ||
c7c55067 TC |
329 | case SPEED_50000: |
330 | speed = AD_LINK_SPEED_50000MBPS; | |
331 | break; | |
332 | ||
424c3232 JX |
333 | case SPEED_56000: |
334 | speed = AD_LINK_SPEED_56000MBPS; | |
335 | break; | |
336 | ||
3952af4d JP |
337 | case SPEED_100000: |
338 | speed = AD_LINK_SPEED_100000MBPS; | |
339 | break; | |
340 | ||
1da177e4 | 341 | default: |
3bf2d28a | 342 | /* unknown speed value from ethtool. shouldn't happen */ |
cd99c377 ND |
343 | if (slave->speed != SPEED_UNKNOWN) |
344 | pr_warn_once("%s: unknown ethtool speed (%d) for port %d (set it to 0)\n", | |
345 | slave->bond->dev->name, | |
346 | slave->speed, | |
347 | port->actor_port_number); | |
3bf2d28a | 348 | speed = 0; |
1da177e4 LT |
349 | break; |
350 | } | |
351 | } | |
352 | ||
d4471f5e VF |
353 | netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", |
354 | port->actor_port_number, speed); | |
1da177e4 LT |
355 | return speed; |
356 | } | |
357 | ||
358 | /** | |
359 | * __get_duplex - get a port's duplex | |
360 | * @port: the port we're looking at | |
361 | * | |
362 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
363 | * 0x01 if in full duplex | |
364 | * 0x00 otherwise | |
365 | */ | |
366 | static u8 __get_duplex(struct port *port) | |
367 | { | |
368 | struct slave *slave = port->slave; | |
b25c2e7d | 369 | u8 retval = 0x0; |
1da177e4 | 370 | |
3bf2d28a VF |
371 | /* handling a special case: when the configuration starts with |
372 | * link down, it sets the duplex to 0. | |
373 | */ | |
b25c2e7d | 374 | if (slave->link == BOND_LINK_UP) { |
1da177e4 LT |
375 | switch (slave->duplex) { |
376 | case DUPLEX_FULL: | |
128ea6c3 | 377 | retval = 0x1; |
d4471f5e VF |
378 | netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", |
379 | port->actor_port_number); | |
1da177e4 LT |
380 | break; |
381 | case DUPLEX_HALF: | |
382 | default: | |
128ea6c3 | 383 | retval = 0x0; |
d4471f5e VF |
384 | netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", |
385 | port->actor_port_number); | |
1da177e4 LT |
386 | break; |
387 | } | |
388 | } | |
389 | return retval; | |
390 | } | |
391 | ||
5ee14e6d NA |
392 | static void __ad_actor_update_port(struct port *port) |
393 | { | |
394 | const struct bonding *bond = bond_get_bond_by_slave(port->slave); | |
395 | ||
396 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
397 | port->actor_system_priority = BOND_AD_INFO(bond).system.sys_priority; | |
398 | } | |
399 | ||
3bf2d28a | 400 | /* Conversions */ |
1da177e4 LT |
401 | |
402 | /** | |
403 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
404 | * @timer_type: which timer to operate | |
405 | * @par: timer parameter. see below | |
406 | * | |
407 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
408 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
3bf2d28a | 409 | * %SLOW_PERIODIC_TIME. |
1da177e4 LT |
410 | */ |
411 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
412 | { | |
128ea6c3 | 413 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
414 | |
415 | switch (timer_type) { | |
3bf2d28a | 416 | case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ |
7bfc4753 | 417 | if (par) |
3bf2d28a | 418 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); |
7bfc4753 | 419 | else |
3bf2d28a | 420 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); |
1da177e4 | 421 | break; |
3bf2d28a | 422 | case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ |
1da177e4 LT |
423 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
424 | break; | |
3bf2d28a VF |
425 | case AD_PERIODIC_TIMER: /* for periodic machine */ |
426 | retval = (par*ad_ticks_per_sec); /* long timeout */ | |
1da177e4 | 427 | break; |
3bf2d28a | 428 | case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ |
1da177e4 LT |
429 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
430 | break; | |
3bf2d28a | 431 | case AD_WAIT_WHILE_TIMER: /* for selection machine */ |
1da177e4 LT |
432 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); |
433 | break; | |
434 | } | |
3bf2d28a | 435 | |
1da177e4 LT |
436 | return retval; |
437 | } | |
438 | ||
439 | ||
3bf2d28a | 440 | /* ================= ad_rx_machine helper functions ================== */ |
1da177e4 | 441 | |
2d6682db JV |
442 | /** |
443 | * __choose_matched - update a port's matched variable from a received lacpdu | |
444 | * @lacpdu: the lacpdu we've received | |
445 | * @port: the port we're looking at | |
446 | * | |
447 | * Update the value of the matched variable, using parameter values from a | |
448 | * newly received lacpdu. Parameter values for the partner carried in the | |
449 | * received PDU are compared with the corresponding operational parameter | |
450 | * values for the actor. Matched is set to TRUE if all of these parameters | |
451 | * match and the PDU parameter partner_state.aggregation has the same value as | |
452 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
453 | * in the aggregation. Matched is also set to TRUE if the value of | |
454 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
455 | * an individual link and lacp will actively maintain the link. Otherwise, | |
456 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
457 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
458 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
459 | * partner_state.lacp_activity variables are TRUE. | |
460 | * | |
461 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
462 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
463 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
464 | */ | |
465 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
466 | { | |
815117ad | 467 | /* check if all parameters are alike |
468 | * or this is individual link(aggregation == FALSE) | |
469 | * then update the state machine Matched variable. | |
470 | */ | |
2d6682db JV |
471 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
472 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
815117ad | 473 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
2d6682db JV |
474 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
475 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
476 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
2d6682db JV |
477 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
478 | ) { | |
2d6682db JV |
479 | port->sm_vars |= AD_PORT_MATCHED; |
480 | } else { | |
481 | port->sm_vars &= ~AD_PORT_MATCHED; | |
482 | } | |
483 | } | |
484 | ||
1da177e4 LT |
485 | /** |
486 | * __record_pdu - record parameters from a received lacpdu | |
487 | * @lacpdu: the lacpdu we've received | |
488 | * @port: the port we're looking at | |
489 | * | |
490 | * Record the parameter values for the Actor carried in a received lacpdu as | |
491 | * the current partner operational parameter values and sets | |
492 | * actor_oper_port_state.defaulted to FALSE. | |
493 | */ | |
494 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
495 | { | |
1da177e4 | 496 | if (lacpdu && port) { |
b99d6ba9 HE |
497 | struct port_params *partner = &port->partner_oper; |
498 | ||
2d6682db | 499 | __choose_matched(lacpdu, port); |
3bf2d28a VF |
500 | /* record the new parameter values for the partner |
501 | * operational | |
502 | */ | |
b99d6ba9 HE |
503 | partner->port_number = ntohs(lacpdu->actor_port); |
504 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
505 | partner->system = lacpdu->actor_system; | |
506 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
507 | partner->key = ntohs(lacpdu->actor_key); | |
508 | partner->port_state = lacpdu->actor_state; | |
1da177e4 | 509 | |
3bf2d28a | 510 | /* set actor_oper_port_state.defaulted to FALSE */ |
1da177e4 LT |
511 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; |
512 | ||
3bf2d28a VF |
513 | /* set the partner sync. to on if the partner is sync, |
514 | * and the port is matched | |
515 | */ | |
63b46242 WK |
516 | if ((port->sm_vars & AD_PORT_MATCHED) && |
517 | (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) { | |
b99d6ba9 | 518 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
63b46242 WK |
519 | pr_debug("%s partner sync=1\n", port->slave->dev->name); |
520 | } else { | |
b99d6ba9 | 521 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
63b46242 WK |
522 | pr_debug("%s partner sync=0\n", port->slave->dev->name); |
523 | } | |
1da177e4 LT |
524 | } |
525 | } | |
526 | ||
527 | /** | |
528 | * __record_default - record default parameters | |
529 | * @port: the port we're looking at | |
530 | * | |
531 | * This function records the default parameter values for the partner carried | |
532 | * in the Partner Admin parameters as the current partner operational parameter | |
533 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
534 | */ | |
535 | static void __record_default(struct port *port) | |
536 | { | |
1da177e4 | 537 | if (port) { |
3bf2d28a | 538 | /* record the partner admin parameters */ |
5eefd1ad HE |
539 | memcpy(&port->partner_oper, &port->partner_admin, |
540 | sizeof(struct port_params)); | |
1da177e4 | 541 | |
3bf2d28a | 542 | /* set actor_oper_port_state.defaulted to true */ |
1da177e4 LT |
543 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; |
544 | } | |
545 | } | |
546 | ||
547 | /** | |
548 | * __update_selected - update a port's Selected variable from a received lacpdu | |
549 | * @lacpdu: the lacpdu we've received | |
550 | * @port: the port we're looking at | |
551 | * | |
552 | * Update the value of the selected variable, using parameter values from a | |
553 | * newly received lacpdu. The parameter values for the Actor carried in the | |
554 | * received PDU are compared with the corresponding operational parameter | |
555 | * values for the ports partner. If one or more of the comparisons shows that | |
556 | * the value(s) received in the PDU differ from the current operational values, | |
557 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
558 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
559 | */ | |
560 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
561 | { | |
1da177e4 | 562 | if (lacpdu && port) { |
ce6a49ad HE |
563 | const struct port_params *partner = &port->partner_oper; |
564 | ||
815117ad | 565 | /* check if any parameter is different then |
566 | * update the state machine selected variable. | |
567 | */ | |
8e95a202 JP |
568 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
569 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
815117ad | 570 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
8e95a202 JP |
571 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
572 | ntohs(lacpdu->actor_key) != partner->key || | |
573 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
574 | port->sm_vars &= ~AD_PORT_SELECTED; |
575 | } | |
576 | } | |
577 | } | |
578 | ||
579 | /** | |
580 | * __update_default_selected - update a port's Selected variable from Partner | |
581 | * @port: the port we're looking at | |
582 | * | |
583 | * This function updates the value of the selected variable, using the partner | |
584 | * administrative parameter values. The administrative values are compared with | |
585 | * the corresponding operational parameter values for the partner. If one or | |
586 | * more of the comparisons shows that the administrative value(s) differ from | |
587 | * the current operational values, then Selected is set to FALSE and | |
588 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
589 | * Selected remains unchanged. | |
590 | */ | |
591 | static void __update_default_selected(struct port *port) | |
592 | { | |
1da177e4 | 593 | if (port) { |
3c52065f HE |
594 | const struct port_params *admin = &port->partner_admin; |
595 | const struct port_params *oper = &port->partner_oper; | |
596 | ||
815117ad | 597 | /* check if any parameter is different then |
598 | * update the state machine selected variable. | |
599 | */ | |
8e95a202 JP |
600 | if (admin->port_number != oper->port_number || |
601 | admin->port_priority != oper->port_priority || | |
815117ad | 602 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
8e95a202 JP |
603 | admin->system_priority != oper->system_priority || |
604 | admin->key != oper->key || | |
605 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 606 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
607 | port->sm_vars &= ~AD_PORT_SELECTED; |
608 | } | |
609 | } | |
610 | } | |
611 | ||
1da177e4 LT |
612 | /** |
613 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
614 | * @lacpdu: the lacpdu we've received | |
615 | * @port: the port we're looking at | |
616 | * | |
617 | * Updates the value of the ntt variable, using parameter values from a newly | |
618 | * received lacpdu. The parameter values for the partner carried in the | |
619 | * received PDU are compared with the corresponding operational parameter | |
620 | * values for the Actor. If one or more of the comparisons shows that the | |
621 | * value(s) received in the PDU differ from the current operational values, | |
622 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
623 | */ | |
624 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
625 | { | |
815117ad | 626 | /* validate lacpdu and port */ |
1da177e4 | 627 | if (lacpdu && port) { |
815117ad | 628 | /* check if any parameter is different then |
629 | * update the port->ntt. | |
630 | */ | |
89cc76f9 JV |
631 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
632 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
815117ad | 633 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
634 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
635 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
636 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
637 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
638 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
639 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
640 | ) { | |
d238d458 | 641 | port->ntt = true; |
1da177e4 LT |
642 | } |
643 | } | |
644 | } | |
645 | ||
1da177e4 LT |
646 | /** |
647 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
648 | * @aggregator: the aggregator we're looking at | |
649 | * | |
650 | */ | |
651 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
652 | { | |
653 | struct port *port; | |
654 | int retval = 1; | |
655 | ||
656 | if (aggregator) { | |
3bf2d28a VF |
657 | /* scan all ports in this aggregator to verfy if they are |
658 | * all ready. | |
659 | */ | |
128ea6c3 BD |
660 | for (port = aggregator->lag_ports; |
661 | port; | |
662 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
663 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
664 | retval = 0; | |
665 | break; | |
666 | } | |
667 | } | |
668 | } | |
669 | ||
670 | return retval; | |
671 | } | |
672 | ||
673 | /** | |
674 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
675 | * @aggregator: the aggregator we're looking at | |
676 | * @val: Should the ports' ready bit be set on or off | |
677 | * | |
678 | */ | |
679 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
680 | { | |
681 | struct port *port; | |
682 | ||
128ea6c3 BD |
683 | for (port = aggregator->lag_ports; port; |
684 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 685 | if (val) |
1da177e4 | 686 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 687 | else |
1da177e4 | 688 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
689 | } |
690 | } | |
691 | ||
0622cab0 JV |
692 | static int __agg_active_ports(struct aggregator *agg) |
693 | { | |
694 | struct port *port; | |
695 | int active = 0; | |
696 | ||
697 | for (port = agg->lag_ports; port; | |
698 | port = port->next_port_in_aggregator) { | |
699 | if (port->is_enabled) | |
700 | active++; | |
701 | } | |
702 | ||
703 | return active; | |
704 | } | |
705 | ||
1da177e4 LT |
706 | /** |
707 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
708 | * @aggregator: the aggregator we're looking at | |
709 | * | |
710 | */ | |
711 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
712 | { | |
0622cab0 | 713 | int nports = __agg_active_ports(aggregator); |
128ea6c3 | 714 | u32 bandwidth = 0; |
1da177e4 | 715 | |
0622cab0 | 716 | if (nports) { |
65cce19c | 717 | switch (__get_link_speed(aggregator->lag_ports)) { |
cb8dda90 | 718 | case AD_LINK_SPEED_1MBPS: |
0622cab0 | 719 | bandwidth = nports; |
1da177e4 | 720 | break; |
cb8dda90 | 721 | case AD_LINK_SPEED_10MBPS: |
0622cab0 | 722 | bandwidth = nports * 10; |
1da177e4 | 723 | break; |
cb8dda90 | 724 | case AD_LINK_SPEED_100MBPS: |
0622cab0 | 725 | bandwidth = nports * 100; |
1da177e4 | 726 | break; |
cb8dda90 | 727 | case AD_LINK_SPEED_1000MBPS: |
0622cab0 | 728 | bandwidth = nports * 1000; |
1da177e4 | 729 | break; |
424c3232 | 730 | case AD_LINK_SPEED_2500MBPS: |
0622cab0 | 731 | bandwidth = nports * 2500; |
424c3232 | 732 | break; |
c7c55067 TC |
733 | case AD_LINK_SPEED_5000MBPS: |
734 | bandwidth = nports * 5000; | |
735 | break; | |
cb8dda90 | 736 | case AD_LINK_SPEED_10000MBPS: |
0622cab0 | 737 | bandwidth = nports * 10000; |
94dbffd5 | 738 | break; |
3fcd64cf ND |
739 | case AD_LINK_SPEED_14000MBPS: |
740 | bandwidth = nports * 14000; | |
741 | break; | |
424c3232 | 742 | case AD_LINK_SPEED_20000MBPS: |
0622cab0 | 743 | bandwidth = nports * 20000; |
424c3232 | 744 | break; |
19ddde1e JW |
745 | case AD_LINK_SPEED_25000MBPS: |
746 | bandwidth = nports * 25000; | |
747 | break; | |
424c3232 | 748 | case AD_LINK_SPEED_40000MBPS: |
0622cab0 | 749 | bandwidth = nports * 40000; |
424c3232 | 750 | break; |
c7c55067 TC |
751 | case AD_LINK_SPEED_50000MBPS: |
752 | bandwidth = nports * 50000; | |
753 | break; | |
424c3232 | 754 | case AD_LINK_SPEED_56000MBPS: |
0622cab0 | 755 | bandwidth = nports * 56000; |
424c3232 | 756 | break; |
3952af4d | 757 | case AD_LINK_SPEED_100000MBPS: |
0622cab0 | 758 | bandwidth = nports * 100000; |
3952af4d | 759 | break; |
1da177e4 | 760 | default: |
3bf2d28a | 761 | bandwidth = 0; /* to silence the compiler */ |
1da177e4 LT |
762 | } |
763 | } | |
764 | return bandwidth; | |
765 | } | |
766 | ||
767 | /** | |
768 | * __get_active_agg - get the current active aggregator | |
769 | * @aggregator: the aggregator we're looking at | |
49b7624e VF |
770 | * |
771 | * Caller must hold RCU lock. | |
1da177e4 LT |
772 | */ |
773 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
774 | { | |
19177e7d VF |
775 | struct bonding *bond = aggregator->slave->bond; |
776 | struct list_head *iter; | |
777 | struct slave *slave; | |
1da177e4 | 778 | |
be79bd04 | 779 | bond_for_each_slave_rcu(bond, slave, iter) |
3fdddd85 | 780 | if (SLAVE_AD_INFO(slave)->aggregator.is_active) |
781 | return &(SLAVE_AD_INFO(slave)->aggregator); | |
1da177e4 | 782 | |
19177e7d | 783 | return NULL; |
1da177e4 LT |
784 | } |
785 | ||
786 | /** | |
787 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
788 | * @port: the port we're looking at | |
1da177e4 LT |
789 | */ |
790 | static inline void __update_lacpdu_from_port(struct port *port) | |
791 | { | |
792 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 793 | const struct port_params *partner = &port->partner_oper; |
1da177e4 | 794 | |
3bf2d28a VF |
795 | /* update current actual Actor parameters |
796 | * lacpdu->subtype initialized | |
1da177e4 LT |
797 | * lacpdu->version_number initialized |
798 | * lacpdu->tlv_type_actor_info initialized | |
799 | * lacpdu->actor_information_length initialized | |
800 | */ | |
801 | ||
d3bb52b0 | 802 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 803 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
804 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
805 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
806 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 | 807 | lacpdu->actor_state = port->actor_oper_port_state; |
63b46242 WK |
808 | pr_debug("update lacpdu: %s, actor port state %x\n", |
809 | port->slave->dev->name, port->actor_oper_port_state); | |
1da177e4 LT |
810 | |
811 | /* lacpdu->reserved_3_1 initialized | |
812 | * lacpdu->tlv_type_partner_info initialized | |
813 | * lacpdu->partner_information_length initialized | |
814 | */ | |
815 | ||
3b5b35d0 HE |
816 | lacpdu->partner_system_priority = htons(partner->system_priority); |
817 | lacpdu->partner_system = partner->system; | |
818 | lacpdu->partner_key = htons(partner->key); | |
819 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
820 | lacpdu->partner_port = htons(partner->port_number); | |
821 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
822 | |
823 | /* lacpdu->reserved_3_2 initialized | |
824 | * lacpdu->tlv_type_collector_info initialized | |
825 | * lacpdu->collector_information_length initialized | |
826 | * collector_max_delay initialized | |
827 | * reserved_12[12] initialized | |
828 | * tlv_type_terminator initialized | |
829 | * terminator_length initialized | |
830 | * reserved_50[50] initialized | |
831 | */ | |
1da177e4 LT |
832 | } |
833 | ||
3bf2d28a | 834 | /* ================= main 802.3ad protocol code ========================= */ |
1da177e4 LT |
835 | |
836 | /** | |
837 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
838 | * @port: the port we're looking at | |
839 | * | |
840 | * Returns: 0 on success | |
841 | * < 0 on error | |
842 | */ | |
843 | static int ad_lacpdu_send(struct port *port) | |
844 | { | |
845 | struct slave *slave = port->slave; | |
846 | struct sk_buff *skb; | |
847 | struct lacpdu_header *lacpdu_header; | |
848 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
849 | |
850 | skb = dev_alloc_skb(length); | |
7bfc4753 | 851 | if (!skb) |
1da177e4 | 852 | return -ENOMEM; |
1da177e4 LT |
853 | |
854 | skb->dev = slave->dev; | |
459a98ed | 855 | skb_reset_mac_header(skb); |
b0e380b1 | 856 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
857 | skb->protocol = PKT_TYPE_LACPDU; |
858 | skb->priority = TC_PRIO_CONTROL; | |
859 | ||
860 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
861 | ||
ada0f863 | 862 | ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 863 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
864 | * because we use it to identify loopback lacpdus in receive. |
865 | */ | |
ada0f863 | 866 | ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 867 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 868 | |
3bf2d28a | 869 | lacpdu_header->lacpdu = port->lacpdu; |
1da177e4 LT |
870 | |
871 | dev_queue_xmit(skb); | |
872 | ||
873 | return 0; | |
874 | } | |
875 | ||
876 | /** | |
877 | * ad_marker_send - send marker information/response on a given port | |
878 | * @port: the port we're looking at | |
879 | * @marker: marker data to send | |
880 | * | |
881 | * Returns: 0 on success | |
882 | * < 0 on error | |
883 | */ | |
1c3f0b8e | 884 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
885 | { |
886 | struct slave *slave = port->slave; | |
887 | struct sk_buff *skb; | |
1c3f0b8e MD |
888 | struct bond_marker_header *marker_header; |
889 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
890 | |
891 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 892 | if (!skb) |
1da177e4 | 893 | return -ENOMEM; |
1da177e4 LT |
894 | |
895 | skb_reserve(skb, 16); | |
896 | ||
897 | skb->dev = slave->dev; | |
459a98ed | 898 | skb_reset_mac_header(skb); |
b0e380b1 | 899 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
900 | skb->protocol = PKT_TYPE_LACPDU; |
901 | ||
1c3f0b8e | 902 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 903 | |
ada0f863 | 904 | ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 905 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
906 | * because we use it to identify loopback MARKERs in receive. |
907 | */ | |
ada0f863 | 908 | ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 909 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 910 | |
3bf2d28a | 911 | marker_header->marker = *marker; |
1da177e4 LT |
912 | |
913 | dev_queue_xmit(skb); | |
914 | ||
915 | return 0; | |
916 | } | |
917 | ||
918 | /** | |
919 | * ad_mux_machine - handle a port's mux state machine | |
920 | * @port: the port we're looking at | |
ee637714 | 921 | * @update_slave_arr: Does slave array need update? |
1da177e4 | 922 | */ |
ee637714 | 923 | static void ad_mux_machine(struct port *port, bool *update_slave_arr) |
1da177e4 LT |
924 | { |
925 | mux_states_t last_state; | |
926 | ||
3bf2d28a VF |
927 | /* keep current State Machine state to compare later if it was |
928 | * changed | |
929 | */ | |
1da177e4 LT |
930 | last_state = port->sm_mux_state; |
931 | ||
932 | if (port->sm_vars & AD_PORT_BEGIN) { | |
3bf2d28a | 933 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
934 | } else { |
935 | switch (port->sm_mux_state) { | |
936 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
937 | if ((port->sm_vars & AD_PORT_SELECTED) |
938 | || (port->sm_vars & AD_PORT_STANDBY)) | |
939 | /* if SELECTED or STANDBY */ | |
3bf2d28a | 940 | port->sm_mux_state = AD_MUX_WAITING; |
1da177e4 LT |
941 | break; |
942 | case AD_MUX_WAITING: | |
3bf2d28a VF |
943 | /* if SELECTED == FALSE return to DETACH state */ |
944 | if (!(port->sm_vars & AD_PORT_SELECTED)) { | |
1da177e4 | 945 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
946 | /* in order to withhold the Selection Logic to |
947 | * check all ports READY_N value every callback | |
948 | * cycle to update ready variable, we check | |
949 | * READY_N and update READY here | |
950 | */ | |
1da177e4 | 951 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 952 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
953 | break; |
954 | } | |
955 | ||
3bf2d28a | 956 | /* check if the wait_while_timer expired */ |
7bfc4753 BD |
957 | if (port->sm_mux_timer_counter |
958 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 959 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 | 960 | |
3bf2d28a VF |
961 | /* in order to withhold the selection logic to check |
962 | * all ports READY_N value every callback cycle to | |
963 | * update ready variable, we check READY_N and update | |
964 | * READY here | |
965 | */ | |
1da177e4 LT |
966 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
967 | ||
3bf2d28a VF |
968 | /* if the wait_while_timer expired, and the port is |
969 | * in READY state, move to ATTACHED state | |
970 | */ | |
7bfc4753 BD |
971 | if ((port->sm_vars & AD_PORT_READY) |
972 | && !port->sm_mux_timer_counter) | |
3bf2d28a | 973 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 LT |
974 | break; |
975 | case AD_MUX_ATTACHED: | |
3bf2d28a VF |
976 | /* check also if agg_select_timer expired (so the |
977 | * edable port will take place only after this timer) | |
978 | */ | |
979 | if ((port->sm_vars & AD_PORT_SELECTED) && | |
980 | (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && | |
981 | !__check_agg_selection_timer(port)) { | |
63b46242 WK |
982 | if (port->aggregator->is_active) |
983 | port->sm_mux_state = | |
984 | AD_MUX_COLLECTING_DISTRIBUTING; | |
3bf2d28a VF |
985 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || |
986 | (port->sm_vars & AD_PORT_STANDBY)) { | |
987 | /* if UNSELECTED or STANDBY */ | |
1da177e4 | 988 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
989 | /* in order to withhold the selection logic to |
990 | * check all ports READY_N value every callback | |
991 | * cycle to update ready variable, we check | |
992 | * READY_N and update READY here | |
993 | */ | |
1da177e4 | 994 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 995 | port->sm_mux_state = AD_MUX_DETACHED; |
63b46242 WK |
996 | } else if (port->aggregator->is_active) { |
997 | port->actor_oper_port_state |= | |
998 | AD_STATE_SYNCHRONIZATION; | |
1da177e4 LT |
999 | } |
1000 | break; | |
1001 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
3bf2d28a VF |
1002 | if (!(port->sm_vars & AD_PORT_SELECTED) || |
1003 | (port->sm_vars & AD_PORT_STANDBY) || | |
63b46242 WK |
1004 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) || |
1005 | !(port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) { | |
3bf2d28a | 1006 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 | 1007 | } else { |
3bf2d28a VF |
1008 | /* if port state hasn't changed make |
1009 | * sure that a collecting distributing | |
1010 | * port in an active aggregator is enabled | |
1011 | */ | |
1da177e4 LT |
1012 | if (port->aggregator && |
1013 | port->aggregator->is_active && | |
1014 | !__port_is_enabled(port)) { | |
1015 | ||
1016 | __enable_port(port); | |
1017 | } | |
1018 | } | |
1019 | break; | |
3bf2d28a | 1020 | default: |
1da177e4 LT |
1021 | break; |
1022 | } | |
1023 | } | |
1024 | ||
3bf2d28a | 1025 | /* check if the state machine was changed */ |
1da177e4 | 1026 | if (port->sm_mux_state != last_state) { |
63b46242 WK |
1027 | pr_debug("Mux Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", |
1028 | port->actor_port_number, | |
1029 | port->slave->dev->name, | |
1030 | last_state, | |
a4aee5c8 | 1031 | port->sm_mux_state); |
1da177e4 LT |
1032 | switch (port->sm_mux_state) { |
1033 | case AD_MUX_DETACHED: | |
1da177e4 | 1034 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
ee637714 MB |
1035 | ad_disable_collecting_distributing(port, |
1036 | update_slave_arr); | |
1da177e4 LT |
1037 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; |
1038 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 1039 | port->ntt = true; |
1da177e4 LT |
1040 | break; |
1041 | case AD_MUX_WAITING: | |
1042 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
1043 | break; | |
1044 | case AD_MUX_ATTACHED: | |
63b46242 WK |
1045 | if (port->aggregator->is_active) |
1046 | port->actor_oper_port_state |= | |
1047 | AD_STATE_SYNCHRONIZATION; | |
1048 | else | |
1049 | port->actor_oper_port_state &= | |
1050 | ~AD_STATE_SYNCHRONIZATION; | |
1da177e4 LT |
1051 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; |
1052 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
ee637714 MB |
1053 | ad_disable_collecting_distributing(port, |
1054 | update_slave_arr); | |
d238d458 | 1055 | port->ntt = true; |
1da177e4 LT |
1056 | break; |
1057 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
1058 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
1059 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
63b46242 | 1060 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; |
ee637714 MB |
1061 | ad_enable_collecting_distributing(port, |
1062 | update_slave_arr); | |
d238d458 | 1063 | port->ntt = true; |
1da177e4 | 1064 | break; |
3bf2d28a | 1065 | default: |
1da177e4 LT |
1066 | break; |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | /** | |
1072 | * ad_rx_machine - handle a port's rx State Machine | |
1073 | * @lacpdu: the lacpdu we've received | |
1074 | * @port: the port we're looking at | |
1075 | * | |
1076 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
1077 | * CURRENT. If timer expired set the state machine in the proper state. | |
1078 | * In other cases, this function checks if we need to switch to other state. | |
1079 | */ | |
1080 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
1081 | { | |
1082 | rx_states_t last_state; | |
1083 | ||
3bf2d28a VF |
1084 | /* keep current State Machine state to compare later if it was |
1085 | * changed | |
1086 | */ | |
1da177e4 LT |
1087 | last_state = port->sm_rx_state; |
1088 | ||
3bf2d28a VF |
1089 | /* check if state machine should change state */ |
1090 | ||
1091 | /* first, check if port was reinitialized */ | |
14c9551a | 1092 | if (port->sm_vars & AD_PORT_BEGIN) { |
7bfc4753 | 1093 | port->sm_rx_state = AD_RX_INITIALIZE; |
ef015d72 | 1094 | port->sm_vars |= AD_PORT_CHURNED; |
3bf2d28a | 1095 | /* check if port is not enabled */ |
ec891c8b | 1096 | } else if (!(port->sm_vars & AD_PORT_BEGIN) && !port->is_enabled) |
7bfc4753 | 1097 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
3bf2d28a VF |
1098 | /* check if new lacpdu arrived */ |
1099 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || | |
1100 | (port->sm_rx_state == AD_RX_DEFAULTED) || | |
1101 | (port->sm_rx_state == AD_RX_CURRENT))) { | |
14c9551a | 1102 | if (port->sm_rx_state != AD_RX_CURRENT) |
ef015d72 | 1103 | port->sm_vars |= AD_PORT_CHURNED; |
3bf2d28a | 1104 | port->sm_rx_timer_counter = 0; |
1da177e4 LT |
1105 | port->sm_rx_state = AD_RX_CURRENT; |
1106 | } else { | |
3bf2d28a VF |
1107 | /* if timer is on, and if it is expired */ |
1108 | if (port->sm_rx_timer_counter && | |
1109 | !(--port->sm_rx_timer_counter)) { | |
1da177e4 LT |
1110 | switch (port->sm_rx_state) { |
1111 | case AD_RX_EXPIRED: | |
3bf2d28a | 1112 | port->sm_rx_state = AD_RX_DEFAULTED; |
1da177e4 LT |
1113 | break; |
1114 | case AD_RX_CURRENT: | |
3bf2d28a | 1115 | port->sm_rx_state = AD_RX_EXPIRED; |
1da177e4 | 1116 | break; |
3bf2d28a | 1117 | default: |
1da177e4 LT |
1118 | break; |
1119 | } | |
1120 | } else { | |
3bf2d28a | 1121 | /* if no lacpdu arrived and no timer is on */ |
1da177e4 LT |
1122 | switch (port->sm_rx_state) { |
1123 | case AD_RX_PORT_DISABLED: | |
ec891c8b MB |
1124 | if (port->is_enabled && |
1125 | (port->sm_vars & AD_PORT_LACP_ENABLED)) | |
3bf2d28a | 1126 | port->sm_rx_state = AD_RX_EXPIRED; |
7bfc4753 BD |
1127 | else if (port->is_enabled |
1128 | && ((port->sm_vars | |
1129 | & AD_PORT_LACP_ENABLED) == 0)) | |
3bf2d28a | 1130 | port->sm_rx_state = AD_RX_LACP_DISABLED; |
1da177e4 | 1131 | break; |
3bf2d28a | 1132 | default: |
1da177e4 LT |
1133 | break; |
1134 | ||
1135 | } | |
1136 | } | |
1137 | } | |
1138 | ||
3bf2d28a | 1139 | /* check if the State machine was changed or new lacpdu arrived */ |
1da177e4 | 1140 | if ((port->sm_rx_state != last_state) || (lacpdu)) { |
63b46242 WK |
1141 | pr_debug("Rx Machine: Port=%d (%s), Last State=%d, Curr State=%d\n", |
1142 | port->actor_port_number, | |
1143 | port->slave->dev->name, | |
1144 | last_state, | |
a4aee5c8 | 1145 | port->sm_rx_state); |
1da177e4 LT |
1146 | switch (port->sm_rx_state) { |
1147 | case AD_RX_INITIALIZE: | |
cb8dda90 | 1148 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS)) |
1da177e4 | 1149 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1150 | else |
1da177e4 | 1151 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1152 | port->sm_vars &= ~AD_PORT_SELECTED; |
1153 | __record_default(port); | |
1154 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
3bf2d28a | 1155 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
1da177e4 | 1156 | |
3bf2d28a | 1157 | /* Fall Through */ |
1da177e4 LT |
1158 | case AD_RX_PORT_DISABLED: |
1159 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1160 | break; | |
1161 | case AD_RX_LACP_DISABLED: | |
1162 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1163 | __record_default(port); | |
1055c9ab | 1164 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1165 | port->sm_vars |= AD_PORT_MATCHED; |
1166 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1167 | break; | |
1168 | case AD_RX_EXPIRED: | |
3bf2d28a VF |
1169 | /* Reset of the Synchronization flag (Standard 43.4.12) |
1170 | * This reset cause to disable this port in the | |
1171 | * COLLECTING_DISTRIBUTING state of the mux machine in | |
1172 | * case of EXPIRED even if LINK_DOWN didn't arrive for | |
1173 | * the port. | |
1174 | */ | |
1055c9ab | 1175 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1176 | port->sm_vars &= ~AD_PORT_MATCHED; |
14c9551a | 1177 | port->partner_oper.port_state |= AD_STATE_LACP_TIMEOUT; |
3bf2d28a | 1178 | port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; |
1da177e4 LT |
1179 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1180 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
ef015d72 | 1181 | port->sm_vars |= AD_PORT_CHURNED; |
1da177e4 LT |
1182 | break; |
1183 | case AD_RX_DEFAULTED: | |
1184 | __update_default_selected(port); | |
1185 | __record_default(port); | |
1186 | port->sm_vars |= AD_PORT_MATCHED; | |
1187 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1188 | break; | |
1189 | case AD_RX_CURRENT: | |
815117ad | 1190 | /* detect loopback situation */ |
3bf2d28a VF |
1191 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), |
1192 | &(port->actor_system))) { | |
d4471f5e | 1193 | netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" |
90194264 | 1194 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", |
3bf2d28a | 1195 | port->slave->dev->name); |
1da177e4 LT |
1196 | return; |
1197 | } | |
1198 | __update_selected(lacpdu, port); | |
1199 | __update_ntt(lacpdu, port); | |
1200 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1201 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1202 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 | 1203 | break; |
3bf2d28a | 1204 | default: |
1da177e4 LT |
1205 | break; |
1206 | } | |
1207 | } | |
1da177e4 LT |
1208 | } |
1209 | ||
14c9551a MB |
1210 | /** |
1211 | * ad_churn_machine - handle port churn's state machine | |
1212 | * @port: the port we're looking at | |
1213 | * | |
1214 | */ | |
1215 | static void ad_churn_machine(struct port *port) | |
1216 | { | |
ef015d72 MB |
1217 | if (port->sm_vars & AD_PORT_CHURNED) { |
1218 | port->sm_vars &= ~AD_PORT_CHURNED; | |
14c9551a MB |
1219 | port->sm_churn_actor_state = AD_CHURN_MONITOR; |
1220 | port->sm_churn_partner_state = AD_CHURN_MONITOR; | |
1221 | port->sm_churn_actor_timer_counter = | |
1222 | __ad_timer_to_ticks(AD_ACTOR_CHURN_TIMER, 0); | |
1223 | port->sm_churn_partner_timer_counter = | |
1224 | __ad_timer_to_ticks(AD_PARTNER_CHURN_TIMER, 0); | |
1225 | return; | |
1226 | } | |
1227 | if (port->sm_churn_actor_timer_counter && | |
1228 | !(--port->sm_churn_actor_timer_counter) && | |
1229 | port->sm_churn_actor_state == AD_CHURN_MONITOR) { | |
1230 | if (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION) { | |
1231 | port->sm_churn_actor_state = AD_NO_CHURN; | |
1232 | } else { | |
1233 | port->churn_actor_count++; | |
1234 | port->sm_churn_actor_state = AD_CHURN; | |
1235 | } | |
1236 | } | |
1237 | if (port->sm_churn_partner_timer_counter && | |
1238 | !(--port->sm_churn_partner_timer_counter) && | |
1239 | port->sm_churn_partner_state == AD_CHURN_MONITOR) { | |
1240 | if (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) { | |
1241 | port->sm_churn_partner_state = AD_NO_CHURN; | |
1242 | } else { | |
1243 | port->churn_partner_count++; | |
1244 | port->sm_churn_partner_state = AD_CHURN; | |
1245 | } | |
1246 | } | |
1247 | } | |
1248 | ||
1da177e4 LT |
1249 | /** |
1250 | * ad_tx_machine - handle a port's tx state machine | |
1251 | * @port: the port we're looking at | |
1da177e4 LT |
1252 | */ |
1253 | static void ad_tx_machine(struct port *port) | |
1254 | { | |
3bf2d28a VF |
1255 | /* check if tx timer expired, to verify that we do not send more than |
1256 | * 3 packets per second | |
1257 | */ | |
1da177e4 | 1258 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { |
3bf2d28a | 1259 | /* check if there is something to send */ |
1da177e4 LT |
1260 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { |
1261 | __update_lacpdu_from_port(port); | |
d238d458 | 1262 | |
1da177e4 | 1263 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1264 | pr_debug("Sent LACPDU on port %d\n", |
1265 | port->actor_port_number); | |
d238d458 | 1266 | |
3bf2d28a VF |
1267 | /* mark ntt as false, so it will not be sent |
1268 | * again until demanded | |
1269 | */ | |
d238d458 | 1270 | port->ntt = false; |
1da177e4 LT |
1271 | } |
1272 | } | |
3bf2d28a VF |
1273 | /* restart tx timer(to verify that we will not exceed |
1274 | * AD_MAX_TX_IN_SECOND | |
1275 | */ | |
1276 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1277 | } |
1278 | } | |
1279 | ||
1280 | /** | |
1281 | * ad_periodic_machine - handle a port's periodic state machine | |
1282 | * @port: the port we're looking at | |
1283 | * | |
1284 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1285 | */ | |
1286 | static void ad_periodic_machine(struct port *port) | |
1287 | { | |
1288 | periodic_states_t last_state; | |
1289 | ||
3bf2d28a | 1290 | /* keep current state machine state to compare later if it was changed */ |
1da177e4 LT |
1291 | last_state = port->sm_periodic_state; |
1292 | ||
3bf2d28a | 1293 | /* check if port was reinitialized */ |
1da177e4 | 1294 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || |
1055c9ab | 1295 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 | 1296 | ) { |
3bf2d28a | 1297 | port->sm_periodic_state = AD_NO_PERIODIC; |
1da177e4 | 1298 | } |
3bf2d28a | 1299 | /* check if state machine should change state */ |
1da177e4 | 1300 | else if (port->sm_periodic_timer_counter) { |
3bf2d28a | 1301 | /* check if periodic state machine expired */ |
1da177e4 | 1302 | if (!(--port->sm_periodic_timer_counter)) { |
3bf2d28a VF |
1303 | /* if expired then do tx */ |
1304 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1da177e4 | 1305 | } else { |
3bf2d28a VF |
1306 | /* If not expired, check if there is some new timeout |
1307 | * parameter from the partner state | |
1308 | */ | |
1da177e4 LT |
1309 | switch (port->sm_periodic_state) { |
1310 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1311 | if (!(port->partner_oper.port_state |
1312 | & AD_STATE_LACP_TIMEOUT)) | |
3bf2d28a | 1313 | port->sm_periodic_state = AD_SLOW_PERIODIC; |
1da177e4 LT |
1314 | break; |
1315 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1316 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 | 1317 | port->sm_periodic_timer_counter = 0; |
3bf2d28a | 1318 | port->sm_periodic_state = AD_PERIODIC_TX; |
1da177e4 LT |
1319 | } |
1320 | break; | |
3bf2d28a | 1321 | default: |
1da177e4 LT |
1322 | break; |
1323 | } | |
1324 | } | |
1325 | } else { | |
1326 | switch (port->sm_periodic_state) { | |
1327 | case AD_NO_PERIODIC: | |
3bf2d28a | 1328 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 LT |
1329 | break; |
1330 | case AD_PERIODIC_TX: | |
3bf2d28a VF |
1331 | if (!(port->partner_oper.port_state & |
1332 | AD_STATE_LACP_TIMEOUT)) | |
1333 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
7bfc4753 | 1334 | else |
3bf2d28a | 1335 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 | 1336 | break; |
3bf2d28a | 1337 | default: |
1da177e4 LT |
1338 | break; |
1339 | } | |
1340 | } | |
1341 | ||
3bf2d28a | 1342 | /* check if the state machine was changed */ |
1da177e4 | 1343 | if (port->sm_periodic_state != last_state) { |
a4aee5c8 JP |
1344 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1345 | port->actor_port_number, last_state, | |
1346 | port->sm_periodic_state); | |
1da177e4 LT |
1347 | switch (port->sm_periodic_state) { |
1348 | case AD_NO_PERIODIC: | |
3bf2d28a | 1349 | port->sm_periodic_timer_counter = 0; |
1da177e4 LT |
1350 | break; |
1351 | case AD_FAST_PERIODIC: | |
3bf2d28a VF |
1352 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1353 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; | |
1da177e4 LT |
1354 | break; |
1355 | case AD_SLOW_PERIODIC: | |
3bf2d28a VF |
1356 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1357 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; | |
1da177e4 LT |
1358 | break; |
1359 | case AD_PERIODIC_TX: | |
d238d458 | 1360 | port->ntt = true; |
1da177e4 | 1361 | break; |
3bf2d28a | 1362 | default: |
1da177e4 LT |
1363 | break; |
1364 | } | |
1365 | } | |
1366 | } | |
1367 | ||
1368 | /** | |
1369 | * ad_port_selection_logic - select aggregation groups | |
1370 | * @port: the port we're looking at | |
ee637714 | 1371 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1372 | * |
1373 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1374 | * selection logic is called in the inititalization (after all the handshkes), | |
1375 | * and after every lacpdu receive (if selected is off). | |
1376 | */ | |
ee637714 | 1377 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) |
1da177e4 LT |
1378 | { |
1379 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1380 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1381 | struct list_head *iter; |
1382 | struct bonding *bond; | |
1383 | struct slave *slave; | |
1da177e4 LT |
1384 | int found = 0; |
1385 | ||
3bf2d28a | 1386 | /* if the port is already Selected, do nothing */ |
7bfc4753 | 1387 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1388 | return; |
1da177e4 | 1389 | |
3e36bb75 VF |
1390 | bond = __get_bond_by_port(port); |
1391 | ||
3bf2d28a | 1392 | /* if the port is connected to other aggregator, detach it */ |
1da177e4 | 1393 | if (port->aggregator) { |
3bf2d28a | 1394 | /* detach the port from its former aggregator */ |
128ea6c3 BD |
1395 | temp_aggregator = port->aggregator; |
1396 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1397 | last_port = curr_port, | |
3bf2d28a | 1398 | curr_port = curr_port->next_port_in_aggregator) { |
1da177e4 LT |
1399 | if (curr_port == port) { |
1400 | temp_aggregator->num_of_ports--; | |
3bf2d28a VF |
1401 | /* if it is the first port attached to the |
1402 | * aggregator | |
1403 | */ | |
1404 | if (!last_port) { | |
128ea6c3 BD |
1405 | temp_aggregator->lag_ports = |
1406 | port->next_port_in_aggregator; | |
3bf2d28a VF |
1407 | } else { |
1408 | /* not the first port attached to the | |
1409 | * aggregator | |
1410 | */ | |
128ea6c3 BD |
1411 | last_port->next_port_in_aggregator = |
1412 | port->next_port_in_aggregator; | |
1da177e4 LT |
1413 | } |
1414 | ||
3bf2d28a VF |
1415 | /* clear the port's relations to this |
1416 | * aggregator | |
1417 | */ | |
1da177e4 | 1418 | port->aggregator = NULL; |
128ea6c3 BD |
1419 | port->next_port_in_aggregator = NULL; |
1420 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1421 | |
d4471f5e VF |
1422 | netdev_dbg(bond->dev, "Port %d left LAG %d\n", |
1423 | port->actor_port_number, | |
1424 | temp_aggregator->aggregator_identifier); | |
3bf2d28a VF |
1425 | /* if the aggregator is empty, clear its |
1426 | * parameters, and set it ready to be attached | |
1427 | */ | |
7bfc4753 | 1428 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1429 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1430 | break; |
1431 | } | |
1432 | } | |
3bf2d28a VF |
1433 | if (!curr_port) { |
1434 | /* meaning: the port was related to an aggregator | |
1435 | * but was not on the aggregator port list | |
1436 | */ | |
d4471f5e VF |
1437 | net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
1438 | port->slave->bond->dev->name, | |
1439 | port->actor_port_number, | |
1440 | port->slave->dev->name, | |
1441 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1442 | } |
1443 | } | |
3bf2d28a | 1444 | /* search on all aggregators for a suitable aggregator for this port */ |
3e36bb75 | 1445 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 1446 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 | 1447 | |
3bf2d28a | 1448 | /* keep a free aggregator for later use(if needed) */ |
1da177e4 | 1449 | if (!aggregator->lag_ports) { |
7bfc4753 | 1450 | if (!free_aggregator) |
128ea6c3 | 1451 | free_aggregator = aggregator; |
1da177e4 LT |
1452 | continue; |
1453 | } | |
815117ad | 1454 | /* check if current aggregator suits us */ |
1455 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1456 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1055c9ab HE |
1457 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
1458 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1459 | ) && |
815117ad | 1460 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
1461 | !aggregator->is_individual) /* but is not individual OR */ | |
1da177e4 LT |
1462 | ) |
1463 | ) { | |
815117ad | 1464 | /* attach to the founded aggregator */ |
1da177e4 | 1465 | port->aggregator = aggregator; |
128ea6c3 BD |
1466 | port->actor_port_aggregator_identifier = |
1467 | port->aggregator->aggregator_identifier; | |
1468 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1469 | port->aggregator->num_of_ports++; |
128ea6c3 | 1470 | aggregator->lag_ports = port; |
d4471f5e VF |
1471 | netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", |
1472 | port->actor_port_number, | |
1473 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1474 | |
3bf2d28a | 1475 | /* mark this port as selected */ |
1da177e4 LT |
1476 | port->sm_vars |= AD_PORT_SELECTED; |
1477 | found = 1; | |
1478 | break; | |
1479 | } | |
1480 | } | |
1481 | ||
3bf2d28a VF |
1482 | /* the port couldn't find an aggregator - attach it to a new |
1483 | * aggregator | |
1484 | */ | |
1da177e4 LT |
1485 | if (!found) { |
1486 | if (free_aggregator) { | |
3bf2d28a | 1487 | /* assign port a new aggregator */ |
1da177e4 | 1488 | port->aggregator = free_aggregator; |
128ea6c3 BD |
1489 | port->actor_port_aggregator_identifier = |
1490 | port->aggregator->aggregator_identifier; | |
1da177e4 | 1491 | |
3bf2d28a VF |
1492 | /* update the new aggregator's parameters |
1493 | * if port was responsed from the end-user | |
1494 | */ | |
cb8dda90 | 1495 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_MASKS) |
7bfc4753 | 1496 | /* if port is full duplex */ |
1624db7b | 1497 | port->aggregator->is_individual = false; |
7bfc4753 | 1498 | else |
1624db7b | 1499 | port->aggregator->is_individual = true; |
1da177e4 | 1500 | |
c3cd9ee1 MB |
1501 | port->aggregator->actor_admin_aggregator_key = |
1502 | port->actor_admin_port_key; | |
1503 | port->aggregator->actor_oper_aggregator_key = | |
1504 | port->actor_oper_port_key; | |
128ea6c3 BD |
1505 | port->aggregator->partner_system = |
1506 | port->partner_oper.system; | |
1507 | port->aggregator->partner_system_priority = | |
1508 | port->partner_oper.system_priority; | |
1055c9ab | 1509 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1510 | port->aggregator->receive_state = 1; |
1511 | port->aggregator->transmit_state = 1; | |
1512 | port->aggregator->lag_ports = port; | |
1513 | port->aggregator->num_of_ports++; | |
1514 | ||
3bf2d28a | 1515 | /* mark this port as selected */ |
1da177e4 LT |
1516 | port->sm_vars |= AD_PORT_SELECTED; |
1517 | ||
d4471f5e VF |
1518 | netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", |
1519 | port->actor_port_number, | |
1520 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1521 | } else { |
d4471f5e | 1522 | netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", |
1da177e4 LT |
1523 | port->actor_port_number, port->slave->dev->name); |
1524 | } | |
1525 | } | |
3bf2d28a VF |
1526 | /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE |
1527 | * in all aggregator's ports, else set ready=FALSE in all | |
1528 | * aggregator's ports | |
1529 | */ | |
1530 | __set_agg_ports_ready(port->aggregator, | |
1531 | __agg_ports_are_ready(port->aggregator)); | |
1da177e4 | 1532 | |
fd989c83 | 1533 | aggregator = __get_first_agg(port); |
ee637714 | 1534 | ad_agg_selection_logic(aggregator, update_slave_arr); |
63b46242 WK |
1535 | |
1536 | if (!port->aggregator->is_active) | |
1537 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
fd989c83 JV |
1538 | } |
1539 | ||
3bf2d28a | 1540 | /* Decide if "agg" is a better choice for the new active aggregator that |
fd989c83 JV |
1541 | * the current best, according to the ad_select policy. |
1542 | */ | |
1543 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1544 | struct aggregator *curr) | |
1545 | { | |
3bf2d28a | 1546 | /* 0. If no best, select current. |
fd989c83 JV |
1547 | * |
1548 | * 1. If the current agg is not individual, and the best is | |
1549 | * individual, select current. | |
1550 | * | |
1551 | * 2. If current agg is individual and the best is not, keep best. | |
1552 | * | |
1553 | * 3. Therefore, current and best are both individual or both not | |
1554 | * individual, so: | |
1555 | * | |
1556 | * 3a. If current agg partner replied, and best agg partner did not, | |
1557 | * select current. | |
1558 | * | |
1559 | * 3b. If current agg partner did not reply and best agg partner | |
1560 | * did reply, keep best. | |
1561 | * | |
1562 | * 4. Therefore, current and best both have partner replies or | |
1563 | * both do not, so perform selection policy: | |
1564 | * | |
1565 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1566 | * select by bandwidth. | |
1567 | * | |
1568 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1569 | */ | |
1570 | if (!best) | |
1571 | return curr; | |
1572 | ||
1573 | if (!curr->is_individual && best->is_individual) | |
1574 | return curr; | |
1575 | ||
1576 | if (curr->is_individual && !best->is_individual) | |
1577 | return best; | |
1578 | ||
1579 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1580 | return curr; | |
1581 | ||
1582 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1583 | return best; | |
1584 | ||
1585 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1586 | case BOND_AD_COUNT: | |
0622cab0 | 1587 | if (__agg_active_ports(curr) > __agg_active_ports(best)) |
fd989c83 JV |
1588 | return curr; |
1589 | ||
0622cab0 | 1590 | if (__agg_active_ports(curr) < __agg_active_ports(best)) |
fd989c83 JV |
1591 | return best; |
1592 | ||
1593 | /*FALLTHROUGH*/ | |
1594 | case BOND_AD_STABLE: | |
1595 | case BOND_AD_BANDWIDTH: | |
1596 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1597 | return curr; | |
1598 | ||
1599 | break; | |
1600 | ||
1601 | default: | |
d4471f5e VF |
1602 | net_warn_ratelimited("%s: Impossible agg select mode %d\n", |
1603 | curr->slave->bond->dev->name, | |
1604 | __get_agg_selection_mode(curr->lag_ports)); | |
fd989c83 | 1605 | break; |
1da177e4 | 1606 | } |
fd989c83 JV |
1607 | |
1608 | return best; | |
1da177e4 LT |
1609 | } |
1610 | ||
4cd6fe1c SH |
1611 | static int agg_device_up(const struct aggregator *agg) |
1612 | { | |
2430af8b | 1613 | struct port *port = agg->lag_ports; |
3bf2d28a | 1614 | |
2430af8b JB |
1615 | if (!port) |
1616 | return 0; | |
3bf2d28a | 1617 | |
0622cab0 JV |
1618 | for (port = agg->lag_ports; port; |
1619 | port = port->next_port_in_aggregator) { | |
1620 | if (netif_running(port->slave->dev) && | |
1621 | netif_carrier_ok(port->slave->dev)) | |
1622 | return 1; | |
1623 | } | |
1624 | ||
1625 | return 0; | |
4cd6fe1c SH |
1626 | } |
1627 | ||
1da177e4 LT |
1628 | /** |
1629 | * ad_agg_selection_logic - select an aggregation group for a team | |
1630 | * @aggregator: the aggregator we're looking at | |
ee637714 | 1631 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1632 | * |
1633 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1634 | * |
1635 | * The logic of this function is to select the aggregator according to | |
1636 | * the ad_select policy: | |
1637 | * | |
1638 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1639 | * it, and to reselect the active aggregator only if the previous | |
1640 | * aggregator has no more ports related to it. | |
1641 | * | |
1642 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1643 | * bandwidth, and reselect whenever a link state change takes place or the | |
1644 | * set of slaves in the bond changes. | |
1645 | * | |
1646 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1647 | * (slaves), and reselect whenever a link state change takes place or the | |
1648 | * set of slaves in the bond changes. | |
1da177e4 LT |
1649 | * |
1650 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1651 | * __get_active_agg() won't work correctly. This function should be better | |
1652 | * called with the bond itself, and retrieve the first agg from it. | |
1653 | */ | |
ee637714 MB |
1654 | static void ad_agg_selection_logic(struct aggregator *agg, |
1655 | bool *update_slave_arr) | |
1da177e4 | 1656 | { |
fd989c83 | 1657 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1658 | struct bonding *bond = agg->slave->bond; |
1659 | struct list_head *iter; | |
1660 | struct slave *slave; | |
1da177e4 | 1661 | struct port *port; |
1da177e4 | 1662 | |
49b7624e | 1663 | rcu_read_lock(); |
fd989c83 | 1664 | origin = agg; |
fd989c83 | 1665 | active = __get_active_agg(agg); |
4cd6fe1c | 1666 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1667 | |
be79bd04 | 1668 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1669 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
bef1fcce | 1670 | |
fd989c83 JV |
1671 | agg->is_active = 0; |
1672 | ||
0622cab0 | 1673 | if (__agg_active_ports(agg) && agg_device_up(agg)) |
fd989c83 | 1674 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1675 | } |
fd989c83 JV |
1676 | |
1677 | if (best && | |
1678 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
3bf2d28a | 1679 | /* For the STABLE policy, don't replace the old active |
fd989c83 JV |
1680 | * aggregator if it's still active (it has an answering |
1681 | * partner) or if both the best and active don't have an | |
1682 | * answering partner. | |
1683 | */ | |
1684 | if (active && active->lag_ports && | |
0622cab0 | 1685 | __agg_active_ports(active) && |
fd989c83 | 1686 | (__agg_has_partner(active) || |
3bf2d28a VF |
1687 | (!__agg_has_partner(active) && |
1688 | !__agg_has_partner(best)))) { | |
fd989c83 JV |
1689 | if (!(!active->actor_oper_aggregator_key && |
1690 | best->actor_oper_aggregator_key)) { | |
1691 | best = NULL; | |
1692 | active->is_active = 1; | |
1da177e4 LT |
1693 | } |
1694 | } | |
fd989c83 | 1695 | } |
1da177e4 | 1696 | |
fd989c83 JV |
1697 | if (best && (best == active)) { |
1698 | best = NULL; | |
1699 | active->is_active = 1; | |
1da177e4 LT |
1700 | } |
1701 | ||
be79bd04 | 1702 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1703 | if (best) { |
d4471f5e VF |
1704 | netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1705 | best->aggregator_identifier, best->num_of_ports, | |
1706 | best->actor_oper_aggregator_key, | |
1707 | best->partner_oper_aggregator_key, | |
1708 | best->is_individual, best->is_active); | |
1709 | netdev_dbg(bond->dev, "best ports %p slave %p %s\n", | |
1710 | best->lag_ports, best->slave, | |
1711 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1712 | |
be79bd04 | 1713 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1714 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
fd989c83 | 1715 | |
d4471f5e VF |
1716 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1717 | agg->aggregator_identifier, agg->num_of_ports, | |
1718 | agg->actor_oper_aggregator_key, | |
1719 | agg->partner_oper_aggregator_key, | |
1720 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1721 | } |
1722 | ||
be79bd04 | 1723 | /* check if any partner replys */ |
fd989c83 | 1724 | if (best->is_individual) { |
d4471f5e VF |
1725 | net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
1726 | best->slave ? | |
1727 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1728 | } |
1729 | ||
fd989c83 | 1730 | best->is_active = 1; |
d4471f5e VF |
1731 | netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", |
1732 | best->aggregator_identifier); | |
1733 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1734 | best->aggregator_identifier, best->num_of_ports, | |
1735 | best->actor_oper_aggregator_key, | |
1736 | best->partner_oper_aggregator_key, | |
1737 | best->is_individual, best->is_active); | |
1da177e4 | 1738 | |
3bf2d28a VF |
1739 | /* disable the ports that were related to the former |
1740 | * active_aggregator | |
1741 | */ | |
fd989c83 JV |
1742 | if (active) { |
1743 | for (port = active->lag_ports; port; | |
1744 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1745 | __disable_port(port); |
1746 | } | |
1747 | } | |
ee637714 MB |
1748 | /* Slave array needs update. */ |
1749 | *update_slave_arr = true; | |
1da177e4 LT |
1750 | } |
1751 | ||
3bf2d28a | 1752 | /* if the selected aggregator is of join individuals |
fd989c83 JV |
1753 | * (partner_system is NULL), enable their ports |
1754 | */ | |
1755 | active = __get_active_agg(origin); | |
1da177e4 | 1756 | |
fd989c83 JV |
1757 | if (active) { |
1758 | if (!__agg_has_partner(active)) { | |
1759 | for (port = active->lag_ports; port; | |
1760 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1761 | __enable_port(port); |
1762 | } | |
1763 | } | |
1764 | } | |
fd989c83 | 1765 | |
be79bd04 | 1766 | rcu_read_unlock(); |
1767 | ||
bef1fcce | 1768 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1769 | } |
1770 | ||
1771 | /** | |
1772 | * ad_clear_agg - clear a given aggregator's parameters | |
1773 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1774 | */ |
1775 | static void ad_clear_agg(struct aggregator *aggregator) | |
1776 | { | |
1777 | if (aggregator) { | |
1624db7b | 1778 | aggregator->is_individual = false; |
1da177e4 LT |
1779 | aggregator->actor_admin_aggregator_key = 0; |
1780 | aggregator->actor_oper_aggregator_key = 0; | |
f87fda00 | 1781 | eth_zero_addr(aggregator->partner_system.mac_addr_value); |
1da177e4 LT |
1782 | aggregator->partner_system_priority = 0; |
1783 | aggregator->partner_oper_aggregator_key = 0; | |
1784 | aggregator->receive_state = 0; | |
1785 | aggregator->transmit_state = 0; | |
1786 | aggregator->lag_ports = NULL; | |
1787 | aggregator->is_active = 0; | |
1788 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1789 | pr_debug("LAG %d was cleared\n", |
1790 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1791 | } |
1792 | } | |
1793 | ||
1794 | /** | |
1795 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1796 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1797 | */ |
1798 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1799 | { | |
1800 | if (aggregator) { | |
1801 | ad_clear_agg(aggregator); | |
1802 | ||
f87fda00 | 1803 | eth_zero_addr(aggregator->aggregator_mac_address.mac_addr_value); |
1da177e4 LT |
1804 | aggregator->aggregator_identifier = 0; |
1805 | aggregator->slave = NULL; | |
1806 | } | |
1807 | } | |
1808 | ||
1809 | /** | |
1810 | * ad_initialize_port - initialize a given port's parameters | |
1811 | * @aggregator: the aggregator we're looking at | |
1812 | * @lacp_fast: boolean. whether fast periodic should be used | |
1da177e4 LT |
1813 | */ |
1814 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1815 | { | |
c7e703d0 HE |
1816 | static const struct port_params tmpl = { |
1817 | .system_priority = 0xffff, | |
1818 | .key = 1, | |
1819 | .port_number = 1, | |
1820 | .port_priority = 0xff, | |
1821 | .port_state = 1, | |
1822 | }; | |
7addeef6 HE |
1823 | static const struct lacpdu lacpdu = { |
1824 | .subtype = 0x01, | |
1825 | .version_number = 0x01, | |
1826 | .tlv_type_actor_info = 0x01, | |
1827 | .actor_information_length = 0x14, | |
1828 | .tlv_type_partner_info = 0x02, | |
1829 | .partner_information_length = 0x14, | |
1830 | .tlv_type_collector_info = 0x03, | |
1831 | .collector_information_length = 0x10, | |
1832 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1833 | }; | |
c7e703d0 | 1834 | |
1da177e4 | 1835 | if (port) { |
1da177e4 | 1836 | port->actor_port_priority = 0xff; |
1da177e4 | 1837 | port->actor_port_aggregator_identifier = 0; |
d238d458 | 1838 | port->ntt = false; |
3bf2d28a VF |
1839 | port->actor_admin_port_state = AD_STATE_AGGREGATION | |
1840 | AD_STATE_LACP_ACTIVITY; | |
1841 | port->actor_oper_port_state = AD_STATE_AGGREGATION | | |
1842 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 | 1843 | |
7bfc4753 | 1844 | if (lacp_fast) |
1da177e4 | 1845 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1846 | |
c7e703d0 HE |
1847 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1848 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1849 | ||
f48127b6 | 1850 | port->is_enabled = true; |
3bf2d28a | 1851 | /* private parameters */ |
19a12049 | 1852 | port->sm_vars = AD_PORT_BEGIN | AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1853 | port->sm_rx_state = 0; |
1854 | port->sm_rx_timer_counter = 0; | |
1855 | port->sm_periodic_state = 0; | |
1856 | port->sm_periodic_timer_counter = 0; | |
1857 | port->sm_mux_state = 0; | |
1858 | port->sm_mux_timer_counter = 0; | |
1859 | port->sm_tx_state = 0; | |
1da177e4 LT |
1860 | port->aggregator = NULL; |
1861 | port->next_port_in_aggregator = NULL; | |
1862 | port->transaction_id = 0; | |
1863 | ||
14c9551a MB |
1864 | port->sm_churn_actor_timer_counter = 0; |
1865 | port->sm_churn_actor_state = 0; | |
1866 | port->churn_actor_count = 0; | |
1867 | port->sm_churn_partner_timer_counter = 0; | |
1868 | port->sm_churn_partner_state = 0; | |
1869 | port->churn_partner_count = 0; | |
1870 | ||
7addeef6 | 1871 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1872 | } |
1873 | } | |
1874 | ||
1875 | /** | |
1876 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1877 | * @port: the port we're looking at | |
ee637714 | 1878 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1879 | * |
1880 | * Enable @port if it's in an active aggregator | |
1881 | */ | |
ee637714 MB |
1882 | static void ad_enable_collecting_distributing(struct port *port, |
1883 | bool *update_slave_arr) | |
1da177e4 LT |
1884 | { |
1885 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1886 | pr_debug("Enabling port %d(LAG %d)\n", |
1887 | port->actor_port_number, | |
1888 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1889 | __enable_port(port); |
ee637714 MB |
1890 | /* Slave array needs update */ |
1891 | *update_slave_arr = true; | |
1da177e4 LT |
1892 | } |
1893 | } | |
1894 | ||
1895 | /** | |
1896 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1897 | * @port: the port we're looking at | |
ee637714 | 1898 | * @update_slave_arr: Does slave array need update? |
1da177e4 | 1899 | */ |
ee637714 MB |
1900 | static void ad_disable_collecting_distributing(struct port *port, |
1901 | bool *update_slave_arr) | |
1da177e4 | 1902 | { |
3bf2d28a VF |
1903 | if (port->aggregator && |
1904 | !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), | |
1905 | &(null_mac_addr))) { | |
a4aee5c8 JP |
1906 | pr_debug("Disabling port %d(LAG %d)\n", |
1907 | port->actor_port_number, | |
1908 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1909 | __disable_port(port); |
ee637714 MB |
1910 | /* Slave array needs an update */ |
1911 | *update_slave_arr = true; | |
1da177e4 LT |
1912 | } |
1913 | } | |
1914 | ||
1da177e4 LT |
1915 | /** |
1916 | * ad_marker_info_received - handle receive of a Marker information frame | |
1917 | * @marker_info: Marker info received | |
1918 | * @port: the port we're looking at | |
1da177e4 | 1919 | */ |
1c3f0b8e MD |
1920 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1921 | struct port *port) | |
1da177e4 | 1922 | { |
1c3f0b8e | 1923 | struct bond_marker marker; |
1da177e4 | 1924 | |
3bf2d28a | 1925 | /* copy the received marker data to the response marker */ |
1c3f0b8e | 1926 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
3bf2d28a | 1927 | /* change the marker subtype to marker response */ |
128ea6c3 | 1928 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 | 1929 | |
3bf2d28a | 1930 | /* send the marker response */ |
1da177e4 | 1931 | if (ad_marker_send(port, &marker) >= 0) { |
a4aee5c8 JP |
1932 | pr_debug("Sent Marker Response on port %d\n", |
1933 | port->actor_port_number); | |
1da177e4 LT |
1934 | } |
1935 | } | |
1936 | ||
1937 | /** | |
1938 | * ad_marker_response_received - handle receive of a marker response frame | |
1939 | * @marker: marker PDU received | |
1940 | * @port: the port we're looking at | |
1941 | * | |
1942 | * This function does nothing since we decided not to implement send and handle | |
1943 | * response for marker PDU's, in this stage, but only to respond to marker | |
1944 | * information. | |
1945 | */ | |
1c3f0b8e | 1946 | static void ad_marker_response_received(struct bond_marker *marker, |
3bf2d28a | 1947 | struct port *port) |
1da177e4 | 1948 | { |
3bf2d28a | 1949 | /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ |
1da177e4 LT |
1950 | } |
1951 | ||
3bf2d28a | 1952 | /* ========= AD exported functions to the main bonding code ========= */ |
1da177e4 | 1953 | |
3bf2d28a | 1954 | /* Check aggregators status in team every T seconds */ |
1da177e4 LT |
1955 | #define AD_AGGREGATOR_SELECTION_TIMER 8 |
1956 | ||
3bf2d28a VF |
1957 | /** |
1958 | * bond_3ad_initiate_agg_selection - initate aggregator selection | |
1959 | * @bond: bonding struct | |
fd989c83 JV |
1960 | * |
1961 | * Set the aggregation selection timer, to initiate an agg selection in | |
1962 | * the very near future. Called during first initialization, and during | |
1963 | * any down to up transitions of the bond. | |
1964 | */ | |
1965 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1966 | { | |
1967 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1968 | } |
1969 | ||
1da177e4 LT |
1970 | /** |
1971 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1972 | * @bond: bonding struct to work on | |
1973 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1974 | * |
1975 | * Can be called only after the mac address of the bond is set. | |
1976 | */ | |
56d00c67 | 1977 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1978 | { |
815117ad | 1979 | /* check that the bond is not initialized yet */ |
1980 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
3a6d54c5 | 1981 | bond->dev->dev_addr)) { |
1da177e4 | 1982 | |
163c8ff3 | 1983 | BOND_AD_INFO(bond).aggregator_identifier = 0; |
1da177e4 | 1984 | |
6791e466 MB |
1985 | BOND_AD_INFO(bond).system.sys_priority = |
1986 | bond->params.ad_actor_sys_prio; | |
74514957 MB |
1987 | if (is_zero_ether_addr(bond->params.ad_actor_system)) |
1988 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
1989 | *((struct mac_addr *)bond->dev->dev_addr); | |
1990 | else | |
1991 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
1992 | *((struct mac_addr *)bond->params.ad_actor_system); | |
1da177e4 | 1993 | |
3bf2d28a VF |
1994 | /* initialize how many times this module is called in one |
1995 | * second (should be about every 100ms) | |
1996 | */ | |
1da177e4 LT |
1997 | ad_ticks_per_sec = tick_resolution; |
1998 | ||
fd989c83 JV |
1999 | bond_3ad_initiate_agg_selection(bond, |
2000 | AD_AGGREGATOR_SELECTION_TIMER * | |
2001 | ad_ticks_per_sec); | |
1da177e4 LT |
2002 | } |
2003 | } | |
2004 | ||
2005 | /** | |
2006 | * bond_3ad_bind_slave - initialize a slave's port | |
2007 | * @slave: slave struct to work on | |
2008 | * | |
2009 | * Returns: 0 on success | |
2010 | * < 0 on error | |
2011 | */ | |
359632e5 | 2012 | void bond_3ad_bind_slave(struct slave *slave) |
1da177e4 LT |
2013 | { |
2014 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
2015 | struct port *port; | |
2016 | struct aggregator *aggregator; | |
2017 | ||
359632e5 | 2018 | /* check that the slave has not been initialized yet. */ |
3fdddd85 | 2019 | if (SLAVE_AD_INFO(slave)->port.slave != slave) { |
1da177e4 | 2020 | |
359632e5 | 2021 | /* port initialization */ |
3fdddd85 | 2022 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2023 | |
bf0239a9 | 2024 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 LT |
2025 | |
2026 | port->slave = slave; | |
3fdddd85 | 2027 | port->actor_port_number = SLAVE_AD_INFO(slave)->id; |
d22a5fc0 MB |
2028 | /* key is determined according to the link speed, duplex and |
2029 | * user key | |
359632e5 | 2030 | */ |
d22a5fc0 | 2031 | port->actor_admin_port_key = bond->params.ad_user_port_key << 6; |
7bb11dc9 | 2032 | ad_update_actor_keys(port, false); |
359632e5 | 2033 | /* actor system is the bond's system */ |
5ee14e6d | 2034 | __ad_actor_update_port(port); |
3bf2d28a VF |
2035 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND |
2036 | * lacpdu's are sent in one second) | |
2037 | */ | |
1da177e4 | 2038 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
1da177e4 LT |
2039 | |
2040 | __disable_port(port); | |
1da177e4 | 2041 | |
359632e5 | 2042 | /* aggregator initialization */ |
3fdddd85 | 2043 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 LT |
2044 | |
2045 | ad_initialize_agg(aggregator); | |
2046 | ||
2047 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
163c8ff3 | 2048 | aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; |
1da177e4 LT |
2049 | aggregator->slave = slave; |
2050 | aggregator->is_active = 0; | |
2051 | aggregator->num_of_ports = 0; | |
2052 | } | |
1da177e4 LT |
2053 | } |
2054 | ||
2055 | /** | |
2056 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
2057 | * @slave: slave struct to work on | |
2058 | * | |
2059 | * Search for the aggregator that is related to this port, remove the | |
2060 | * aggregator and assign another aggregator for other port related to it | |
2061 | * (if any), and remove the port. | |
2062 | */ | |
2063 | void bond_3ad_unbind_slave(struct slave *slave) | |
2064 | { | |
2065 | struct port *port, *prev_port, *temp_port; | |
2066 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
2067 | int select_new_active_agg = 0; | |
0b088264 VF |
2068 | struct bonding *bond = slave->bond; |
2069 | struct slave *slave_iter; | |
2070 | struct list_head *iter; | |
ee637714 | 2071 | bool dummy_slave_update; /* Ignore this value as caller updates array */ |
a361c83c | 2072 | |
e470259f NA |
2073 | /* Sync against bond_3ad_state_machine_handler() */ |
2074 | spin_lock_bh(&bond->mode_lock); | |
3fdddd85 | 2075 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
2076 | port = &(SLAVE_AD_INFO(slave)->port); | |
1da177e4 | 2077 | |
3bf2d28a | 2078 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2079 | if (!port->slave) { |
d4471f5e VF |
2080 | netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", |
2081 | slave->dev->name); | |
e470259f | 2082 | goto out; |
1da177e4 LT |
2083 | } |
2084 | ||
d4471f5e VF |
2085 | netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", |
2086 | aggregator->aggregator_identifier); | |
1da177e4 LT |
2087 | |
2088 | /* Tell the partner that this port is not suitable for aggregation */ | |
2089 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
2090 | __update_lacpdu_from_port(port); | |
2091 | ad_lacpdu_send(port); | |
2092 | ||
3bf2d28a | 2093 | /* check if this aggregator is occupied */ |
1da177e4 | 2094 | if (aggregator->lag_ports) { |
3bf2d28a VF |
2095 | /* check if there are other ports related to this aggregator |
2096 | * except the port related to this slave(thats ensure us that | |
2097 | * there is a reason to search for new aggregator, and that we | |
2098 | * will find one | |
2099 | */ | |
2100 | if ((aggregator->lag_ports != port) || | |
2101 | (aggregator->lag_ports->next_port_in_aggregator)) { | |
2102 | /* find new aggregator for the related port(s) */ | |
0b088264 | 2103 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 2104 | new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
3bf2d28a VF |
2105 | /* if the new aggregator is empty, or it is |
2106 | * connected to our port only | |
2107 | */ | |
2108 | if (!new_aggregator->lag_ports || | |
2109 | ((new_aggregator->lag_ports == port) && | |
2110 | !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 2111 | break; |
1da177e4 | 2112 | } |
0b088264 VF |
2113 | if (!slave_iter) |
2114 | new_aggregator = NULL; | |
3bf2d28a VF |
2115 | |
2116 | /* if new aggregator found, copy the aggregator's | |
2117 | * parameters and connect the related lag_ports to the | |
2118 | * new aggregator | |
2119 | */ | |
1da177e4 | 2120 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { |
d4471f5e VF |
2121 | netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", |
2122 | aggregator->aggregator_identifier, | |
2123 | new_aggregator->aggregator_identifier); | |
1da177e4 | 2124 | |
3bf2d28a VF |
2125 | if ((new_aggregator->lag_ports == port) && |
2126 | new_aggregator->is_active) { | |
d4471f5e | 2127 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
1da177e4 LT |
2128 | select_new_active_agg = 1; |
2129 | } | |
2130 | ||
2131 | new_aggregator->is_individual = aggregator->is_individual; | |
2132 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
2133 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
2134 | new_aggregator->partner_system = aggregator->partner_system; | |
2135 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
2136 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
2137 | new_aggregator->receive_state = aggregator->receive_state; | |
2138 | new_aggregator->transmit_state = aggregator->transmit_state; | |
2139 | new_aggregator->lag_ports = aggregator->lag_ports; | |
2140 | new_aggregator->is_active = aggregator->is_active; | |
2141 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
2142 | ||
3bf2d28a VF |
2143 | /* update the information that is written on |
2144 | * the ports about the aggregator | |
2145 | */ | |
128ea6c3 BD |
2146 | for (temp_port = aggregator->lag_ports; temp_port; |
2147 | temp_port = temp_port->next_port_in_aggregator) { | |
2148 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
2149 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
2150 | } | |
2151 | ||
1da177e4 | 2152 | ad_clear_agg(aggregator); |
a361c83c | 2153 | |
7bfc4753 | 2154 | if (select_new_active_agg) |
ee637714 MB |
2155 | ad_agg_selection_logic(__get_first_agg(port), |
2156 | &dummy_slave_update); | |
1da177e4 | 2157 | } else { |
d4471f5e | 2158 | netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); |
1da177e4 | 2159 | } |
3bf2d28a VF |
2160 | } else { |
2161 | /* in case that the only port related to this | |
2162 | * aggregator is the one we want to remove | |
2163 | */ | |
1da177e4 | 2164 | select_new_active_agg = aggregator->is_active; |
1da177e4 LT |
2165 | ad_clear_agg(aggregator); |
2166 | if (select_new_active_agg) { | |
d4471f5e | 2167 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 2168 | /* select new active aggregator */ |
74684493 VF |
2169 | temp_aggregator = __get_first_agg(port); |
2170 | if (temp_aggregator) | |
ee637714 MB |
2171 | ad_agg_selection_logic(temp_aggregator, |
2172 | &dummy_slave_update); | |
1da177e4 LT |
2173 | } |
2174 | } | |
2175 | } | |
2176 | ||
d4471f5e | 2177 | netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); |
3bf2d28a VF |
2178 | |
2179 | /* find the aggregator that this port is connected to */ | |
0b088264 | 2180 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 2181 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
1da177e4 | 2182 | prev_port = NULL; |
3bf2d28a | 2183 | /* search the port in the aggregator's related ports */ |
128ea6c3 BD |
2184 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2185 | prev_port = temp_port, | |
3bf2d28a VF |
2186 | temp_port = temp_port->next_port_in_aggregator) { |
2187 | if (temp_port == port) { | |
2188 | /* the aggregator found - detach the port from | |
2189 | * this aggregator | |
2190 | */ | |
7bfc4753 | 2191 | if (prev_port) |
1da177e4 | 2192 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2193 | else |
1da177e4 | 2194 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2195 | temp_aggregator->num_of_ports--; |
0622cab0 | 2196 | if (__agg_active_ports(temp_aggregator) == 0) { |
1da177e4 | 2197 | select_new_active_agg = temp_aggregator->is_active; |
1da177e4 LT |
2198 | ad_clear_agg(temp_aggregator); |
2199 | if (select_new_active_agg) { | |
d4471f5e | 2200 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 2201 | /* select new active aggregator */ |
ee637714 MB |
2202 | ad_agg_selection_logic(__get_first_agg(port), |
2203 | &dummy_slave_update); | |
1da177e4 LT |
2204 | } |
2205 | } | |
2206 | break; | |
2207 | } | |
2208 | } | |
2209 | } | |
128ea6c3 | 2210 | port->slave = NULL; |
e470259f NA |
2211 | |
2212 | out: | |
2213 | spin_unlock_bh(&bond->mode_lock); | |
1da177e4 LT |
2214 | } |
2215 | ||
5ee14e6d NA |
2216 | /** |
2217 | * bond_3ad_update_ad_actor_settings - reflect change of actor settings to ports | |
2218 | * @bond: bonding struct to work on | |
2219 | * | |
2220 | * If an ad_actor setting gets changed we need to update the individual port | |
2221 | * settings so the bond device will use the new values when it gets upped. | |
2222 | */ | |
2223 | void bond_3ad_update_ad_actor_settings(struct bonding *bond) | |
2224 | { | |
2225 | struct list_head *iter; | |
2226 | struct slave *slave; | |
2227 | ||
2228 | ASSERT_RTNL(); | |
2229 | ||
2230 | BOND_AD_INFO(bond).system.sys_priority = bond->params.ad_actor_sys_prio; | |
2231 | if (is_zero_ether_addr(bond->params.ad_actor_system)) | |
2232 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
2233 | *((struct mac_addr *)bond->dev->dev_addr); | |
2234 | else | |
2235 | BOND_AD_INFO(bond).system.sys_mac_addr = | |
2236 | *((struct mac_addr *)bond->params.ad_actor_system); | |
2237 | ||
2238 | spin_lock_bh(&bond->mode_lock); | |
7f20cd25 NA |
2239 | bond_for_each_slave(bond, slave, iter) { |
2240 | struct port *port = &(SLAVE_AD_INFO(slave))->port; | |
2241 | ||
2242 | __ad_actor_update_port(port); | |
2243 | port->ntt = true; | |
2244 | } | |
5ee14e6d NA |
2245 | spin_unlock_bh(&bond->mode_lock); |
2246 | } | |
2247 | ||
1da177e4 LT |
2248 | /** |
2249 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2250 | * @bond: bonding struct to work on | |
2251 | * | |
2252 | * The state machine handling concept in this module is to check every tick | |
2253 | * which state machine should operate any function. The execution order is | |
2254 | * round robin, so when we have an interaction between state machines, the | |
2255 | * reply of one to each other might be delayed until next tick. | |
2256 | * | |
2257 | * This function also complete the initialization when the agg_select_timer | |
2258 | * times out, and it selects an aggregator for the ports that are yet not | |
2259 | * related to any aggregator, and selects the active aggregator for a bond. | |
2260 | */ | |
1b76b316 | 2261 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2262 | { |
1b76b316 JV |
2263 | struct bonding *bond = container_of(work, struct bonding, |
2264 | ad_work.work); | |
1da177e4 | 2265 | struct aggregator *aggregator; |
3c4c88a1 VF |
2266 | struct list_head *iter; |
2267 | struct slave *slave; | |
2268 | struct port *port; | |
5e5b0665 | 2269 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
ee637714 | 2270 | bool update_slave_arr = false; |
1da177e4 | 2271 | |
e470259f NA |
2272 | /* Lock to protect data accessed by all (e.g., port->sm_vars) and |
2273 | * against running with bond_3ad_unbind_slave. ad_rx_machine may run | |
2274 | * concurrently due to incoming LACPDU as well. | |
2275 | */ | |
b7435628 | 2276 | spin_lock_bh(&bond->mode_lock); |
be79bd04 | 2277 | rcu_read_lock(); |
1f2cd845 | 2278 | |
be79bd04 | 2279 | /* check if there are any slaves */ |
0965a1f3 | 2280 | if (!bond_has_slaves(bond)) |
1da177e4 | 2281 | goto re_arm; |
1da177e4 | 2282 | |
be79bd04 | 2283 | /* check if agg_select_timer timer after initialize is timed out */ |
3bf2d28a VF |
2284 | if (BOND_AD_INFO(bond).agg_select_timer && |
2285 | !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
be79bd04 | 2286 | slave = bond_first_slave_rcu(bond); |
3fdddd85 | 2287 | port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; |
fe9323da | 2288 | |
be79bd04 | 2289 | /* select the active aggregator for the bond */ |
fe9323da | 2290 | if (port) { |
1da177e4 | 2291 | if (!port->slave) { |
d4471f5e VF |
2292 | net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", |
2293 | bond->dev->name); | |
1da177e4 LT |
2294 | goto re_arm; |
2295 | } | |
2296 | ||
2297 | aggregator = __get_first_agg(port); | |
ee637714 | 2298 | ad_agg_selection_logic(aggregator, &update_slave_arr); |
1da177e4 | 2299 | } |
f0c76d61 | 2300 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2301 | } |
2302 | ||
be79bd04 | 2303 | /* for each port run the state machines */ |
2304 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3fdddd85 | 2305 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2306 | if (!port->slave) { |
d4471f5e | 2307 | net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", |
86a2b9cf | 2308 | bond->dev->name); |
1da177e4 LT |
2309 | goto re_arm; |
2310 | } | |
2311 | ||
2312 | ad_rx_machine(NULL, port); | |
2313 | ad_periodic_machine(port); | |
ee637714 MB |
2314 | ad_port_selection_logic(port, &update_slave_arr); |
2315 | ad_mux_machine(port, &update_slave_arr); | |
1da177e4 | 2316 | ad_tx_machine(port); |
14c9551a | 2317 | ad_churn_machine(port); |
1da177e4 | 2318 | |
be79bd04 | 2319 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2320 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2321 | port->sm_vars &= ~AD_PORT_BEGIN; |
1da177e4 LT |
2322 | } |
2323 | ||
2324 | re_arm: | |
5e5b0665 | 2325 | bond_for_each_slave_rcu(bond, slave, iter) { |
2326 | if (slave->should_notify) { | |
2327 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2328 | break; | |
2329 | } | |
2330 | } | |
be79bd04 | 2331 | rcu_read_unlock(); |
b7435628 | 2332 | spin_unlock_bh(&bond->mode_lock); |
5e5b0665 | 2333 | |
ee637714 MB |
2334 | if (update_slave_arr) |
2335 | bond_slave_arr_work_rearm(bond, 0); | |
2336 | ||
5e5b0665 | 2337 | if (should_notify_rtnl && rtnl_trylock()) { |
b0929915 | 2338 | bond_slave_state_notify(bond); |
5e5b0665 | 2339 | rtnl_unlock(); |
2340 | } | |
be79bd04 | 2341 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2342 | } |
2343 | ||
2344 | /** | |
2345 | * bond_3ad_rx_indication - handle a received frame | |
2346 | * @lacpdu: received lacpdu | |
2347 | * @slave: slave struct to work on | |
2348 | * @length: length of the data received | |
2349 | * | |
2350 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2351 | * received frames (loopback). Since only the payload is given to this | |
2352 | * function, it check for loopback. | |
2353 | */ | |
3bf2d28a VF |
2354 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, |
2355 | u16 length) | |
1da177e4 LT |
2356 | { |
2357 | struct port *port; | |
13a8e0c8 | 2358 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2359 | |
2360 | if (length >= sizeof(struct lacpdu)) { | |
2361 | ||
3fdddd85 | 2362 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2363 | |
2364 | if (!port->slave) { | |
d4471f5e VF |
2365 | net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", |
2366 | slave->dev->name, slave->bond->dev->name); | |
13a8e0c8 | 2367 | return ret; |
1da177e4 LT |
2368 | } |
2369 | ||
2370 | switch (lacpdu->subtype) { | |
2371 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2372 | ret = RX_HANDLER_CONSUMED; |
2f637324 SA |
2373 | netdev_dbg(slave->bond->dev, |
2374 | "Received LACPDU on port %d slave %s\n", | |
2375 | port->actor_port_number, | |
2376 | slave->dev->name); | |
16d79d7d | 2377 | /* Protect against concurrent state machines */ |
e470259f | 2378 | spin_lock(&slave->bond->mode_lock); |
1da177e4 | 2379 | ad_rx_machine(lacpdu, port); |
e470259f | 2380 | spin_unlock(&slave->bond->mode_lock); |
1da177e4 LT |
2381 | break; |
2382 | ||
2383 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2384 | ret = RX_HANDLER_CONSUMED; |
3bf2d28a VF |
2385 | /* No need to convert fields to Little Endian since we |
2386 | * don't use the marker's fields. | |
2387 | */ | |
1da177e4 | 2388 | |
1c3f0b8e | 2389 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2390 | case AD_MARKER_INFORMATION_SUBTYPE: |
d4471f5e VF |
2391 | netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", |
2392 | port->actor_port_number); | |
1c3f0b8e | 2393 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2394 | break; |
2395 | ||
2396 | case AD_MARKER_RESPONSE_SUBTYPE: | |
d4471f5e VF |
2397 | netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", |
2398 | port->actor_port_number); | |
1c3f0b8e | 2399 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2400 | break; |
2401 | ||
2402 | default: | |
d4471f5e VF |
2403 | netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", |
2404 | port->actor_port_number); | |
1da177e4 LT |
2405 | } |
2406 | } | |
2407 | } | |
13a8e0c8 | 2408 | return ret; |
1da177e4 LT |
2409 | } |
2410 | ||
7bb11dc9 MB |
2411 | /** |
2412 | * ad_update_actor_keys - Update the oper / admin keys for a port based on | |
2413 | * its current speed and duplex settings. | |
2414 | * | |
2415 | * @port: the port we'are looking at | |
2416 | * @reset: Boolean to just reset the speed and the duplex part of the key | |
2417 | * | |
2418 | * The logic to change the oper / admin keys is: | |
2419 | * (a) A full duplex port can participate in LACP with partner. | |
2420 | * (b) When the speed is changed, LACP need to be reinitiated. | |
2421 | */ | |
2422 | static void ad_update_actor_keys(struct port *port, bool reset) | |
2423 | { | |
2424 | u8 duplex = 0; | |
2425 | u16 ospeed = 0, speed = 0; | |
2426 | u16 old_oper_key = port->actor_oper_port_key; | |
2427 | ||
2428 | port->actor_admin_port_key &= ~(AD_SPEED_KEY_MASKS|AD_DUPLEX_KEY_MASKS); | |
2429 | if (!reset) { | |
2430 | speed = __get_link_speed(port); | |
2431 | ospeed = (old_oper_key & AD_SPEED_KEY_MASKS) >> 1; | |
2432 | duplex = __get_duplex(port); | |
2433 | port->actor_admin_port_key |= (speed << 1) | duplex; | |
2434 | } | |
2435 | port->actor_oper_port_key = port->actor_admin_port_key; | |
2436 | ||
2437 | if (old_oper_key != port->actor_oper_port_key) { | |
2438 | /* Only 'duplex' port participates in LACP */ | |
2439 | if (duplex) | |
2440 | port->sm_vars |= AD_PORT_LACP_ENABLED; | |
2441 | else | |
2442 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; | |
2443 | ||
2444 | if (!reset) { | |
2445 | if (!speed) { | |
2446 | netdev_err(port->slave->dev, | |
2447 | "speed changed to 0 for port %s", | |
2448 | port->slave->dev->name); | |
2449 | } else if (duplex && ospeed != speed) { | |
2450 | /* Speed change restarts LACP state-machine */ | |
2451 | port->sm_vars |= AD_PORT_BEGIN; | |
2452 | } | |
2453 | } | |
2454 | } | |
2455 | } | |
2456 | ||
1da177e4 | 2457 | /** |
52bc6716 MB |
2458 | * bond_3ad_adapter_speed_duplex_changed - handle a slave's speed / duplex |
2459 | * change indication | |
1da177e4 | 2460 | * |
1da177e4 LT |
2461 | * @slave: slave struct to work on |
2462 | * | |
2463 | * Handle reselection of aggregator (if needed) for this port. | |
2464 | */ | |
52bc6716 | 2465 | void bond_3ad_adapter_speed_duplex_changed(struct slave *slave) |
1da177e4 LT |
2466 | { |
2467 | struct port *port; | |
2468 | ||
3fdddd85 | 2469 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2470 | |
bca44a73 | 2471 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2472 | if (!port->slave) { |
52bc6716 MB |
2473 | netdev_warn(slave->bond->dev, |
2474 | "speed/duplex changed for uninitialized port %s\n", | |
d4471f5e | 2475 | slave->dev->name); |
1da177e4 LT |
2476 | return; |
2477 | } | |
2478 | ||
e470259f | 2479 | spin_lock_bh(&slave->bond->mode_lock); |
7bb11dc9 | 2480 | ad_update_actor_keys(port, false); |
e292dcae | 2481 | spin_unlock_bh(&slave->bond->mode_lock); |
52bc6716 | 2482 | netdev_dbg(slave->bond->dev, "Port %d slave %s changed speed/duplex\n", |
2f637324 | 2483 | port->actor_port_number, slave->dev->name); |
1da177e4 LT |
2484 | } |
2485 | ||
2486 | /** | |
2487 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2488 | * @slave: slave struct to work on | |
2489 | * @status: whether the link is now up or down | |
2490 | * | |
2491 | * Handle reselection of aggregator (if needed) for this port. | |
2492 | */ | |
2493 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2494 | { | |
0622cab0 | 2495 | struct aggregator *agg; |
1da177e4 | 2496 | struct port *port; |
0622cab0 | 2497 | bool dummy; |
1da177e4 | 2498 | |
3fdddd85 | 2499 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2500 | |
108db736 | 2501 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2502 | if (!port->slave) { |
d4471f5e VF |
2503 | netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", |
2504 | slave->dev->name); | |
1da177e4 LT |
2505 | return; |
2506 | } | |
2507 | ||
e470259f | 2508 | spin_lock_bh(&slave->bond->mode_lock); |
108db736 | 2509 | /* on link down we are zeroing duplex and speed since |
2510 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2511 | * instead of N/A(duplex) / 0(speed). | |
2512 | * | |
2513 | * on link up we are forcing recheck on the duplex and speed since | |
2514 | * some of he adaptors(ce1000.lan) report. | |
2515 | */ | |
1da177e4 | 2516 | if (link == BOND_LINK_UP) { |
f48127b6 | 2517 | port->is_enabled = true; |
7bb11dc9 | 2518 | ad_update_actor_keys(port, false); |
1da177e4 LT |
2519 | } else { |
2520 | /* link has failed */ | |
f48127b6 | 2521 | port->is_enabled = false; |
7bb11dc9 | 2522 | ad_update_actor_keys(port, true); |
1da177e4 | 2523 | } |
0622cab0 JV |
2524 | agg = __get_first_agg(port); |
2525 | ad_agg_selection_logic(agg, &dummy); | |
2526 | ||
e292dcae MB |
2527 | spin_unlock_bh(&slave->bond->mode_lock); |
2528 | ||
d4471f5e VF |
2529 | netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", |
2530 | port->actor_port_number, | |
2531 | link == BOND_LINK_UP ? "UP" : "DOWN"); | |
108db736 | 2532 | |
ee637714 MB |
2533 | /* RTNL is held and mode_lock is released so it's safe |
2534 | * to update slave_array here. | |
2535 | */ | |
2536 | bond_update_slave_arr(slave->bond, NULL); | |
1da177e4 LT |
2537 | } |
2538 | ||
3bf2d28a VF |
2539 | /** |
2540 | * bond_3ad_set_carrier - set link state for bonding master | |
2541 | * @bond - bonding structure | |
2542 | * | |
2543 | * if we have an active aggregator, we're up, if not, we're down. | |
2544 | * Presumes that we cannot have an active aggregator if there are | |
2545 | * no slaves with link up. | |
ff59c456 | 2546 | * |
031ae4de JV |
2547 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2548 | * | |
ff59c456 JV |
2549 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2550 | * change, nonzero if it does. | |
2551 | */ | |
2552 | int bond_3ad_set_carrier(struct bonding *bond) | |
2553 | { | |
655f8919 | 2554 | struct aggregator *active; |
dec1e90e | 2555 | struct slave *first_slave; |
c1bc9644 | 2556 | int ret = 1; |
655f8919 | 2557 | |
be79bd04 | 2558 | rcu_read_lock(); |
2559 | first_slave = bond_first_slave_rcu(bond); | |
c1bc9644 VF |
2560 | if (!first_slave) { |
2561 | ret = 0; | |
2562 | goto out; | |
2563 | } | |
3fdddd85 | 2564 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); |
655f8919 | 2565 | if (active) { |
2566 | /* are enough slaves available to consider link up? */ | |
0622cab0 | 2567 | if (__agg_active_ports(active) < bond->params.min_links) { |
655f8919 | 2568 | if (netif_carrier_ok(bond->dev)) { |
2569 | netif_carrier_off(bond->dev); | |
c1bc9644 | 2570 | goto out; |
655f8919 | 2571 | } |
2572 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 | 2573 | netif_carrier_on(bond->dev); |
c1bc9644 | 2574 | goto out; |
ff59c456 | 2575 | } |
c1bc9644 | 2576 | } else if (netif_carrier_ok(bond->dev)) { |
ff59c456 | 2577 | netif_carrier_off(bond->dev); |
ff59c456 | 2578 | } |
c1bc9644 VF |
2579 | out: |
2580 | rcu_read_unlock(); | |
2581 | return ret; | |
ff59c456 JV |
2582 | } |
2583 | ||
1da177e4 | 2584 | /** |
318debd8 | 2585 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2586 | * @bond: bonding struct to work on |
2587 | * @ad_info: ad_info struct to fill with the bond's info | |
2588 | * | |
2589 | * Returns: 0 on success | |
2590 | * < 0 on error | |
2591 | */ | |
318debd8 | 2592 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2593 | struct ad_info *ad_info) | |
1da177e4 LT |
2594 | { |
2595 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2596 | struct list_head *iter; |
2597 | struct slave *slave; | |
1da177e4 LT |
2598 | struct port *port; |
2599 | ||
47e91f56 | 2600 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2601 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2602 | if (port->aggregator && port->aggregator->is_active) { |
2603 | aggregator = port->aggregator; | |
2604 | break; | |
2605 | } | |
2606 | } | |
2607 | ||
21f374c6 JP |
2608 | if (!aggregator) |
2609 | return -1; | |
2610 | ||
2611 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
751da2a6 | 2612 | ad_info->ports = __agg_active_ports(aggregator); |
21f374c6 JP |
2613 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; |
2614 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2615 | ether_addr_copy(ad_info->partner_system, | |
2616 | aggregator->partner_system.mac_addr_value); | |
2617 | return 0; | |
1da177e4 LT |
2618 | } |
2619 | ||
318debd8 | 2620 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
2621 | { | |
2622 | int ret; | |
2623 | ||
47e91f56 | 2624 | rcu_read_lock(); |
318debd8 | 2625 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2626 | rcu_read_unlock(); |
318debd8 | 2627 | |
2628 | return ret; | |
2629 | } | |
2630 | ||
de063b70 ED |
2631 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2632 | struct slave *slave) | |
1da177e4 | 2633 | { |
de063b70 ED |
2634 | struct lacpdu *lacpdu, _lacpdu; |
2635 | ||
3aba891d | 2636 | if (skb->protocol != PKT_TYPE_LACPDU) |
86e74986 | 2637 | return RX_HANDLER_ANOTHER; |
b3053251 | 2638 | |
bb54e589 MB |
2639 | if (!MAC_ADDRESS_EQUAL(eth_hdr(skb)->h_dest, lacpdu_mcast_addr)) |
2640 | return RX_HANDLER_ANOTHER; | |
2641 | ||
de063b70 ED |
2642 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2643 | if (!lacpdu) | |
86e74986 | 2644 | return RX_HANDLER_ANOTHER; |
ab12811c | 2645 | |
86e74986 | 2646 | return bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2647 | } |
ba824a8b | 2648 | |
3bf2d28a VF |
2649 | /** |
2650 | * bond_3ad_update_lacp_rate - change the lacp rate | |
2651 | * @bond - bonding struct | |
2652 | * | |
ba824a8b PP |
2653 | * When modify lacp_rate parameter via sysfs, |
2654 | * update actor_oper_port_state of each port. | |
2655 | * | |
e470259f | 2656 | * Hold bond->mode_lock, |
ba824a8b PP |
2657 | * so we can modify port->actor_oper_port_state, |
2658 | * no matter bond is up or down. | |
2659 | */ | |
2660 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2661 | { | |
ba824a8b | 2662 | struct port *port = NULL; |
9caff1e7 | 2663 | struct list_head *iter; |
c509316b | 2664 | struct slave *slave; |
ba824a8b PP |
2665 | int lacp_fast; |
2666 | ||
ba824a8b | 2667 | lacp_fast = bond->params.lacp_fast; |
e470259f | 2668 | spin_lock_bh(&bond->mode_lock); |
9caff1e7 | 2669 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 2670 | port = &(SLAVE_AD_INFO(slave)->port); |
ba824a8b PP |
2671 | if (lacp_fast) |
2672 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2673 | else | |
2674 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
ba824a8b | 2675 | } |
e470259f | 2676 | spin_unlock_bh(&bond->mode_lock); |
ba824a8b | 2677 | } |