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