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