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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 | |
73 | ||
3bf2d28a VF |
74 | /* Port Key definitions |
75 | * key is determined according to the link speed, duplex and | |
76 | * user key (which is yet not supported) | |
77 | * -------------------------------------------------------------- | |
78 | * Port key : | User key | Speed | Duplex | | |
79 | * -------------------------------------------------------------- | |
80 | * 16 6 1 0 | |
81 | */ | |
1da177e4 LT |
82 | #define AD_DUPLEX_KEY_BITS 0x1 |
83 | #define AD_SPEED_KEY_BITS 0x3E | |
84 | #define AD_USER_KEY_BITS 0xFFC0 | |
85 | ||
1da177e4 LT |
86 | #define AD_LINK_SPEED_BITMASK_1MBPS 0x1 |
87 | #define AD_LINK_SPEED_BITMASK_10MBPS 0x2 | |
88 | #define AD_LINK_SPEED_BITMASK_100MBPS 0x4 | |
89 | #define AD_LINK_SPEED_BITMASK_1000MBPS 0x8 | |
94dbffd5 | 90 | #define AD_LINK_SPEED_BITMASK_10000MBPS 0x10 |
1da177e4 | 91 | |
815117ad | 92 | /* compare MAC addresses */ |
93 | #define MAC_ADDRESS_EQUAL(A, B) \ | |
94 | ether_addr_equal_64bits((const u8 *)A, (const u8 *)B) | |
1da177e4 | 95 | |
128ea6c3 | 96 | static struct mac_addr null_mac_addr = { { 0, 0, 0, 0, 0, 0 } }; |
1da177e4 LT |
97 | static u16 ad_ticks_per_sec; |
98 | static const int ad_delta_in_ticks = (AD_TIMER_INTERVAL * HZ) / 1000; | |
99 | ||
e4ac4320 HE |
100 | static const u8 lacpdu_mcast_addr[ETH_ALEN] = MULTICAST_LACPDU_ADDR; |
101 | ||
3bf2d28a | 102 | /* ================= main 802.3ad protocol functions ================== */ |
1da177e4 | 103 | static int ad_lacpdu_send(struct port *port); |
1c3f0b8e | 104 | static int ad_marker_send(struct port *port, struct bond_marker *marker); |
ee637714 | 105 | static void ad_mux_machine(struct port *port, bool *update_slave_arr); |
1da177e4 LT |
106 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port); |
107 | static void ad_tx_machine(struct port *port); | |
108 | static void ad_periodic_machine(struct port *port); | |
ee637714 MB |
109 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr); |
110 | static void ad_agg_selection_logic(struct aggregator *aggregator, | |
111 | bool *update_slave_arr); | |
1da177e4 LT |
112 | static void ad_clear_agg(struct aggregator *aggregator); |
113 | static void ad_initialize_agg(struct aggregator *aggregator); | |
114 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
ee637714 MB |
115 | static void ad_enable_collecting_distributing(struct port *port, |
116 | bool *update_slave_arr); | |
117 | static void ad_disable_collecting_distributing(struct port *port, | |
118 | bool *update_slave_arr); | |
3bf2d28a VF |
119 | static void ad_marker_info_received(struct bond_marker *marker_info, |
120 | struct port *port); | |
121 | static void ad_marker_response_received(struct bond_marker *marker, | |
122 | struct port *port); | |
1da177e4 LT |
123 | |
124 | ||
3bf2d28a | 125 | /* ================= api to bonding and kernel code ================== */ |
1da177e4 LT |
126 | |
127 | /** | |
128 | * __get_bond_by_port - get the port's bonding struct | |
129 | * @port: the port we're looking at | |
130 | * | |
131 | * Return @port's bonding struct, or %NULL if it can't be found. | |
132 | */ | |
133 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
134 | { | |
7bfc4753 | 135 | if (port->slave == NULL) |
1da177e4 | 136 | return NULL; |
1da177e4 LT |
137 | |
138 | return bond_get_bond_by_slave(port->slave); | |
139 | } | |
140 | ||
1da177e4 LT |
141 | /** |
142 | * __get_first_agg - get the first aggregator in the bond | |
143 | * @bond: the bond we're looking at | |
144 | * | |
145 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
146 | * found. | |
768b9549 | 147 | * The caller must hold RCU or RTNL lock. |
1da177e4 LT |
148 | */ |
149 | static inline struct aggregator *__get_first_agg(struct port *port) | |
150 | { | |
151 | struct bonding *bond = __get_bond_by_port(port); | |
dec1e90e | 152 | struct slave *first_slave; |
768b9549 | 153 | struct aggregator *agg; |
1da177e4 | 154 | |
be79bd04 | 155 | /* If there's no bond for this port, or bond has no slaves */ |
dec1e90e | 156 | if (bond == NULL) |
1da177e4 | 157 | return NULL; |
3bf2d28a | 158 | |
be79bd04 | 159 | rcu_read_lock(); |
160 | first_slave = bond_first_slave_rcu(bond); | |
3fdddd85 | 161 | agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; |
be79bd04 | 162 | rcu_read_unlock(); |
3bf2d28a | 163 | |
768b9549 | 164 | return agg; |
1da177e4 LT |
165 | } |
166 | ||
3bf2d28a VF |
167 | /** |
168 | * __agg_has_partner - see if we have a partner | |
169 | * @agg: the agregator we're looking at | |
fd989c83 JV |
170 | * |
171 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
3bf2d28a | 172 | * address for the partner). Return 0 if not. |
fd989c83 JV |
173 | */ |
174 | static inline int __agg_has_partner(struct aggregator *agg) | |
175 | { | |
176 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
177 | } | |
178 | ||
1da177e4 LT |
179 | /** |
180 | * __disable_port - disable the port's slave | |
181 | * @port: the port we're looking at | |
1da177e4 LT |
182 | */ |
183 | static inline void __disable_port(struct port *port) | |
184 | { | |
5e5b0665 | 185 | bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
186 | } |
187 | ||
188 | /** | |
189 | * __enable_port - enable the port's slave, if it's up | |
190 | * @port: the port we're looking at | |
1da177e4 LT |
191 | */ |
192 | static inline void __enable_port(struct port *port) | |
193 | { | |
194 | struct slave *slave = port->slave; | |
195 | ||
b6adc610 | 196 | if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) |
5e5b0665 | 197 | bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
198 | } |
199 | ||
200 | /** | |
201 | * __port_is_enabled - check if the port's slave is in active state | |
202 | * @port: the port we're looking at | |
1da177e4 LT |
203 | */ |
204 | static inline int __port_is_enabled(struct port *port) | |
205 | { | |
e30bc066 | 206 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
207 | } |
208 | ||
209 | /** | |
210 | * __get_agg_selection_mode - get the aggregator selection mode | |
211 | * @port: the port we're looking at | |
212 | * | |
fd989c83 | 213 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
214 | */ |
215 | static inline u32 __get_agg_selection_mode(struct port *port) | |
216 | { | |
217 | struct bonding *bond = __get_bond_by_port(port); | |
218 | ||
7bfc4753 | 219 | if (bond == NULL) |
fd989c83 | 220 | return BOND_AD_STABLE; |
1da177e4 | 221 | |
1a14fbcb | 222 | return bond->params.ad_select; |
1da177e4 LT |
223 | } |
224 | ||
225 | /** | |
226 | * __check_agg_selection_timer - check if the selection timer has expired | |
227 | * @port: the port we're looking at | |
1da177e4 LT |
228 | */ |
229 | static inline int __check_agg_selection_timer(struct port *port) | |
230 | { | |
231 | struct bonding *bond = __get_bond_by_port(port); | |
232 | ||
7bfc4753 | 233 | if (bond == NULL) |
1da177e4 | 234 | return 0; |
1da177e4 LT |
235 | |
236 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
237 | } | |
238 | ||
1da177e4 LT |
239 | /** |
240 | * __get_link_speed - get a port's speed | |
241 | * @port: the port we're looking at | |
242 | * | |
243 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
244 | * 0, | |
245 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
246 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
247 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
248 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
249 | */ |
250 | static u16 __get_link_speed(struct port *port) | |
251 | { | |
252 | struct slave *slave = port->slave; | |
253 | u16 speed; | |
254 | ||
3bf2d28a VF |
255 | /* this if covers only a special case: when the configuration starts |
256 | * with link down, it sets the speed to 0. | |
257 | * This is done in spite of the fact that the e100 driver reports 0 | |
258 | * to be compatible with MVT in the future. | |
259 | */ | |
7bfc4753 | 260 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 261 | speed = 0; |
7bfc4753 | 262 | else { |
1da177e4 LT |
263 | switch (slave->speed) { |
264 | case SPEED_10: | |
265 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
266 | break; | |
267 | ||
268 | case SPEED_100: | |
269 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
270 | break; | |
271 | ||
272 | case SPEED_1000: | |
273 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
274 | break; | |
275 | ||
94dbffd5 JV |
276 | case SPEED_10000: |
277 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
278 | break; | |
279 | ||
1da177e4 | 280 | default: |
3bf2d28a VF |
281 | /* unknown speed value from ethtool. shouldn't happen */ |
282 | speed = 0; | |
1da177e4 LT |
283 | break; |
284 | } | |
285 | } | |
286 | ||
d4471f5e VF |
287 | netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", |
288 | port->actor_port_number, speed); | |
1da177e4 LT |
289 | return speed; |
290 | } | |
291 | ||
292 | /** | |
293 | * __get_duplex - get a port's duplex | |
294 | * @port: the port we're looking at | |
295 | * | |
296 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
297 | * 0x01 if in full duplex | |
298 | * 0x00 otherwise | |
299 | */ | |
300 | static u8 __get_duplex(struct port *port) | |
301 | { | |
302 | struct slave *slave = port->slave; | |
1da177e4 LT |
303 | u8 retval; |
304 | ||
3bf2d28a VF |
305 | /* handling a special case: when the configuration starts with |
306 | * link down, it sets the duplex to 0. | |
307 | */ | |
547942ca | 308 | if (slave->link != BOND_LINK_UP) { |
128ea6c3 | 309 | retval = 0x0; |
547942ca | 310 | } else { |
1da177e4 LT |
311 | switch (slave->duplex) { |
312 | case DUPLEX_FULL: | |
128ea6c3 | 313 | retval = 0x1; |
d4471f5e VF |
314 | netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", |
315 | port->actor_port_number); | |
1da177e4 LT |
316 | break; |
317 | case DUPLEX_HALF: | |
318 | default: | |
128ea6c3 | 319 | retval = 0x0; |
d4471f5e VF |
320 | netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", |
321 | port->actor_port_number); | |
1da177e4 LT |
322 | break; |
323 | } | |
324 | } | |
325 | return retval; | |
326 | } | |
327 | ||
3bf2d28a | 328 | /* Conversions */ |
1da177e4 LT |
329 | |
330 | /** | |
331 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
332 | * @timer_type: which timer to operate | |
333 | * @par: timer parameter. see below | |
334 | * | |
335 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
336 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
3bf2d28a | 337 | * %SLOW_PERIODIC_TIME. |
1da177e4 LT |
338 | */ |
339 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
340 | { | |
128ea6c3 | 341 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
342 | |
343 | switch (timer_type) { | |
3bf2d28a | 344 | case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ |
7bfc4753 | 345 | if (par) |
3bf2d28a | 346 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); |
7bfc4753 | 347 | else |
3bf2d28a | 348 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); |
1da177e4 | 349 | break; |
3bf2d28a | 350 | case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ |
1da177e4 LT |
351 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
352 | break; | |
3bf2d28a VF |
353 | case AD_PERIODIC_TIMER: /* for periodic machine */ |
354 | retval = (par*ad_ticks_per_sec); /* long timeout */ | |
1da177e4 | 355 | break; |
3bf2d28a | 356 | case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ |
1da177e4 LT |
357 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
358 | break; | |
3bf2d28a | 359 | case AD_WAIT_WHILE_TIMER: /* for selection machine */ |
1da177e4 LT |
360 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); |
361 | break; | |
362 | } | |
3bf2d28a | 363 | |
1da177e4 LT |
364 | return retval; |
365 | } | |
366 | ||
367 | ||
3bf2d28a | 368 | /* ================= ad_rx_machine helper functions ================== */ |
1da177e4 | 369 | |
2d6682db JV |
370 | /** |
371 | * __choose_matched - update a port's matched variable from a received lacpdu | |
372 | * @lacpdu: the lacpdu we've received | |
373 | * @port: the port we're looking at | |
374 | * | |
375 | * Update the value of the matched variable, using parameter values from a | |
376 | * newly received lacpdu. Parameter values for the partner carried in the | |
377 | * received PDU are compared with the corresponding operational parameter | |
378 | * values for the actor. Matched is set to TRUE if all of these parameters | |
379 | * match and the PDU parameter partner_state.aggregation has the same value as | |
380 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
381 | * in the aggregation. Matched is also set to TRUE if the value of | |
382 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
383 | * an individual link and lacp will actively maintain the link. Otherwise, | |
384 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
385 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
386 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
387 | * partner_state.lacp_activity variables are TRUE. | |
388 | * | |
389 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
390 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
391 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
392 | */ | |
393 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
394 | { | |
815117ad | 395 | /* check if all parameters are alike |
396 | * or this is individual link(aggregation == FALSE) | |
397 | * then update the state machine Matched variable. | |
398 | */ | |
2d6682db JV |
399 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
400 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
815117ad | 401 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
2d6682db JV |
402 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
403 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
404 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
2d6682db JV |
405 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
406 | ) { | |
2d6682db JV |
407 | port->sm_vars |= AD_PORT_MATCHED; |
408 | } else { | |
409 | port->sm_vars &= ~AD_PORT_MATCHED; | |
410 | } | |
411 | } | |
412 | ||
1da177e4 LT |
413 | /** |
414 | * __record_pdu - record parameters from a received lacpdu | |
415 | * @lacpdu: the lacpdu we've received | |
416 | * @port: the port we're looking at | |
417 | * | |
418 | * Record the parameter values for the Actor carried in a received lacpdu as | |
419 | * the current partner operational parameter values and sets | |
420 | * actor_oper_port_state.defaulted to FALSE. | |
421 | */ | |
422 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
423 | { | |
1da177e4 | 424 | if (lacpdu && port) { |
b99d6ba9 HE |
425 | struct port_params *partner = &port->partner_oper; |
426 | ||
2d6682db | 427 | __choose_matched(lacpdu, port); |
3bf2d28a VF |
428 | /* record the new parameter values for the partner |
429 | * operational | |
430 | */ | |
b99d6ba9 HE |
431 | partner->port_number = ntohs(lacpdu->actor_port); |
432 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
433 | partner->system = lacpdu->actor_system; | |
434 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
435 | partner->key = ntohs(lacpdu->actor_key); | |
436 | partner->port_state = lacpdu->actor_state; | |
1da177e4 | 437 | |
3bf2d28a | 438 | /* set actor_oper_port_state.defaulted to FALSE */ |
1da177e4 LT |
439 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; |
440 | ||
3bf2d28a VF |
441 | /* set the partner sync. to on if the partner is sync, |
442 | * and the port is matched | |
443 | */ | |
7bfc4753 BD |
444 | if ((port->sm_vars & AD_PORT_MATCHED) |
445 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 446 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 447 | else |
b99d6ba9 | 448 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
449 | } |
450 | } | |
451 | ||
452 | /** | |
453 | * __record_default - record default parameters | |
454 | * @port: the port we're looking at | |
455 | * | |
456 | * This function records the default parameter values for the partner carried | |
457 | * in the Partner Admin parameters as the current partner operational parameter | |
458 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
459 | */ | |
460 | static void __record_default(struct port *port) | |
461 | { | |
1da177e4 | 462 | if (port) { |
3bf2d28a | 463 | /* record the partner admin parameters */ |
5eefd1ad HE |
464 | memcpy(&port->partner_oper, &port->partner_admin, |
465 | sizeof(struct port_params)); | |
1da177e4 | 466 | |
3bf2d28a | 467 | /* set actor_oper_port_state.defaulted to true */ |
1da177e4 LT |
468 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; |
469 | } | |
470 | } | |
471 | ||
472 | /** | |
473 | * __update_selected - update a port's Selected variable from a received lacpdu | |
474 | * @lacpdu: the lacpdu we've received | |
475 | * @port: the port we're looking at | |
476 | * | |
477 | * Update the value of the selected variable, using parameter values from a | |
478 | * newly received lacpdu. The parameter values for the Actor carried in the | |
479 | * received PDU are compared with the corresponding operational parameter | |
480 | * values for the ports partner. If one or more of the comparisons shows that | |
481 | * the value(s) received in the PDU differ from the current operational values, | |
482 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
483 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
484 | */ | |
485 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
486 | { | |
1da177e4 | 487 | if (lacpdu && port) { |
ce6a49ad HE |
488 | const struct port_params *partner = &port->partner_oper; |
489 | ||
815117ad | 490 | /* check if any parameter is different then |
491 | * update the state machine selected variable. | |
492 | */ | |
8e95a202 JP |
493 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
494 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
815117ad | 495 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
8e95a202 JP |
496 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
497 | ntohs(lacpdu->actor_key) != partner->key || | |
498 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
499 | port->sm_vars &= ~AD_PORT_SELECTED; |
500 | } | |
501 | } | |
502 | } | |
503 | ||
504 | /** | |
505 | * __update_default_selected - update a port's Selected variable from Partner | |
506 | * @port: the port we're looking at | |
507 | * | |
508 | * This function updates the value of the selected variable, using the partner | |
509 | * administrative parameter values. The administrative values are compared with | |
510 | * the corresponding operational parameter values for the partner. If one or | |
511 | * more of the comparisons shows that the administrative value(s) differ from | |
512 | * the current operational values, then Selected is set to FALSE and | |
513 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
514 | * Selected remains unchanged. | |
515 | */ | |
516 | static void __update_default_selected(struct port *port) | |
517 | { | |
1da177e4 | 518 | if (port) { |
3c52065f HE |
519 | const struct port_params *admin = &port->partner_admin; |
520 | const struct port_params *oper = &port->partner_oper; | |
521 | ||
815117ad | 522 | /* check if any parameter is different then |
523 | * update the state machine selected variable. | |
524 | */ | |
8e95a202 JP |
525 | if (admin->port_number != oper->port_number || |
526 | admin->port_priority != oper->port_priority || | |
815117ad | 527 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
8e95a202 JP |
528 | admin->system_priority != oper->system_priority || |
529 | admin->key != oper->key || | |
530 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 531 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
532 | port->sm_vars &= ~AD_PORT_SELECTED; |
533 | } | |
534 | } | |
535 | } | |
536 | ||
1da177e4 LT |
537 | /** |
538 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
539 | * @lacpdu: the lacpdu we've received | |
540 | * @port: the port we're looking at | |
541 | * | |
542 | * Updates the value of the ntt variable, using parameter values from a newly | |
543 | * received lacpdu. The parameter values for the partner carried in the | |
544 | * received PDU are compared with the corresponding operational parameter | |
545 | * values for the Actor. If one or more of the comparisons shows that the | |
546 | * value(s) received in the PDU differ from the current operational values, | |
547 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
548 | */ | |
549 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
550 | { | |
815117ad | 551 | /* validate lacpdu and port */ |
1da177e4 | 552 | if (lacpdu && port) { |
815117ad | 553 | /* check if any parameter is different then |
554 | * update the port->ntt. | |
555 | */ | |
89cc76f9 JV |
556 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
557 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
815117ad | 558 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
559 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
560 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
561 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
562 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
563 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
564 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
565 | ) { | |
d238d458 | 566 | port->ntt = true; |
1da177e4 LT |
567 | } |
568 | } | |
569 | } | |
570 | ||
1da177e4 LT |
571 | /** |
572 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
573 | * @aggregator: the aggregator we're looking at | |
574 | * | |
575 | */ | |
576 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
577 | { | |
578 | struct port *port; | |
579 | int retval = 1; | |
580 | ||
581 | if (aggregator) { | |
3bf2d28a VF |
582 | /* scan all ports in this aggregator to verfy if they are |
583 | * all ready. | |
584 | */ | |
128ea6c3 BD |
585 | for (port = aggregator->lag_ports; |
586 | port; | |
587 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
588 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
589 | retval = 0; | |
590 | break; | |
591 | } | |
592 | } | |
593 | } | |
594 | ||
595 | return retval; | |
596 | } | |
597 | ||
598 | /** | |
599 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
600 | * @aggregator: the aggregator we're looking at | |
601 | * @val: Should the ports' ready bit be set on or off | |
602 | * | |
603 | */ | |
604 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
605 | { | |
606 | struct port *port; | |
607 | ||
128ea6c3 BD |
608 | for (port = aggregator->lag_ports; port; |
609 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 610 | if (val) |
1da177e4 | 611 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 612 | else |
1da177e4 | 613 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
614 | } |
615 | } | |
616 | ||
617 | /** | |
618 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
619 | * @aggregator: the aggregator we're looking at | |
620 | * | |
621 | */ | |
622 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
623 | { | |
128ea6c3 | 624 | u32 bandwidth = 0; |
1da177e4 LT |
625 | |
626 | if (aggregator->num_of_ports) { | |
65cce19c | 627 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
628 | case AD_LINK_SPEED_BITMASK_1MBPS: |
629 | bandwidth = aggregator->num_of_ports; | |
630 | break; | |
631 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
632 | bandwidth = aggregator->num_of_ports * 10; | |
633 | break; | |
634 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
635 | bandwidth = aggregator->num_of_ports * 100; | |
636 | break; | |
637 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
638 | bandwidth = aggregator->num_of_ports * 1000; | |
639 | break; | |
94dbffd5 JV |
640 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
641 | bandwidth = aggregator->num_of_ports * 10000; | |
642 | break; | |
1da177e4 | 643 | default: |
3bf2d28a | 644 | bandwidth = 0; /* to silence the compiler */ |
1da177e4 LT |
645 | } |
646 | } | |
647 | return bandwidth; | |
648 | } | |
649 | ||
650 | /** | |
651 | * __get_active_agg - get the current active aggregator | |
652 | * @aggregator: the aggregator we're looking at | |
49b7624e VF |
653 | * |
654 | * Caller must hold RCU lock. | |
1da177e4 LT |
655 | */ |
656 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
657 | { | |
19177e7d VF |
658 | struct bonding *bond = aggregator->slave->bond; |
659 | struct list_head *iter; | |
660 | struct slave *slave; | |
1da177e4 | 661 | |
be79bd04 | 662 | bond_for_each_slave_rcu(bond, slave, iter) |
3fdddd85 | 663 | if (SLAVE_AD_INFO(slave)->aggregator.is_active) |
664 | return &(SLAVE_AD_INFO(slave)->aggregator); | |
1da177e4 | 665 | |
19177e7d | 666 | return NULL; |
1da177e4 LT |
667 | } |
668 | ||
669 | /** | |
670 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
671 | * @port: the port we're looking at | |
1da177e4 LT |
672 | */ |
673 | static inline void __update_lacpdu_from_port(struct port *port) | |
674 | { | |
675 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 676 | const struct port_params *partner = &port->partner_oper; |
1da177e4 | 677 | |
3bf2d28a VF |
678 | /* update current actual Actor parameters |
679 | * lacpdu->subtype initialized | |
1da177e4 LT |
680 | * lacpdu->version_number initialized |
681 | * lacpdu->tlv_type_actor_info initialized | |
682 | * lacpdu->actor_information_length initialized | |
683 | */ | |
684 | ||
d3bb52b0 | 685 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 686 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
687 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
688 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
689 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
690 | lacpdu->actor_state = port->actor_oper_port_state; |
691 | ||
692 | /* lacpdu->reserved_3_1 initialized | |
693 | * lacpdu->tlv_type_partner_info initialized | |
694 | * lacpdu->partner_information_length initialized | |
695 | */ | |
696 | ||
3b5b35d0 HE |
697 | lacpdu->partner_system_priority = htons(partner->system_priority); |
698 | lacpdu->partner_system = partner->system; | |
699 | lacpdu->partner_key = htons(partner->key); | |
700 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
701 | lacpdu->partner_port = htons(partner->port_number); | |
702 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
703 | |
704 | /* lacpdu->reserved_3_2 initialized | |
705 | * lacpdu->tlv_type_collector_info initialized | |
706 | * lacpdu->collector_information_length initialized | |
707 | * collector_max_delay initialized | |
708 | * reserved_12[12] initialized | |
709 | * tlv_type_terminator initialized | |
710 | * terminator_length initialized | |
711 | * reserved_50[50] initialized | |
712 | */ | |
1da177e4 LT |
713 | } |
714 | ||
3bf2d28a | 715 | /* ================= main 802.3ad protocol code ========================= */ |
1da177e4 LT |
716 | |
717 | /** | |
718 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
719 | * @port: the port we're looking at | |
720 | * | |
721 | * Returns: 0 on success | |
722 | * < 0 on error | |
723 | */ | |
724 | static int ad_lacpdu_send(struct port *port) | |
725 | { | |
726 | struct slave *slave = port->slave; | |
727 | struct sk_buff *skb; | |
728 | struct lacpdu_header *lacpdu_header; | |
729 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
730 | |
731 | skb = dev_alloc_skb(length); | |
7bfc4753 | 732 | if (!skb) |
1da177e4 | 733 | return -ENOMEM; |
1da177e4 LT |
734 | |
735 | skb->dev = slave->dev; | |
459a98ed | 736 | skb_reset_mac_header(skb); |
b0e380b1 | 737 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
738 | skb->protocol = PKT_TYPE_LACPDU; |
739 | skb->priority = TC_PRIO_CONTROL; | |
740 | ||
741 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
742 | ||
ada0f863 | 743 | ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 744 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
745 | * because we use it to identify loopback lacpdus in receive. |
746 | */ | |
ada0f863 | 747 | ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 748 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 749 | |
3bf2d28a | 750 | lacpdu_header->lacpdu = port->lacpdu; |
1da177e4 LT |
751 | |
752 | dev_queue_xmit(skb); | |
753 | ||
754 | return 0; | |
755 | } | |
756 | ||
757 | /** | |
758 | * ad_marker_send - send marker information/response on a given port | |
759 | * @port: the port we're looking at | |
760 | * @marker: marker data to send | |
761 | * | |
762 | * Returns: 0 on success | |
763 | * < 0 on error | |
764 | */ | |
1c3f0b8e | 765 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
766 | { |
767 | struct slave *slave = port->slave; | |
768 | struct sk_buff *skb; | |
1c3f0b8e MD |
769 | struct bond_marker_header *marker_header; |
770 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
771 | |
772 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 773 | if (!skb) |
1da177e4 | 774 | return -ENOMEM; |
1da177e4 LT |
775 | |
776 | skb_reserve(skb, 16); | |
777 | ||
778 | skb->dev = slave->dev; | |
459a98ed | 779 | skb_reset_mac_header(skb); |
b0e380b1 | 780 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
781 | skb->protocol = PKT_TYPE_LACPDU; |
782 | ||
1c3f0b8e | 783 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 784 | |
ada0f863 | 785 | ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 786 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
787 | * because we use it to identify loopback MARKERs in receive. |
788 | */ | |
ada0f863 | 789 | ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 790 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 791 | |
3bf2d28a | 792 | marker_header->marker = *marker; |
1da177e4 LT |
793 | |
794 | dev_queue_xmit(skb); | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
799 | /** | |
800 | * ad_mux_machine - handle a port's mux state machine | |
801 | * @port: the port we're looking at | |
ee637714 | 802 | * @update_slave_arr: Does slave array need update? |
1da177e4 | 803 | */ |
ee637714 | 804 | static void ad_mux_machine(struct port *port, bool *update_slave_arr) |
1da177e4 LT |
805 | { |
806 | mux_states_t last_state; | |
807 | ||
3bf2d28a VF |
808 | /* keep current State Machine state to compare later if it was |
809 | * changed | |
810 | */ | |
1da177e4 LT |
811 | last_state = port->sm_mux_state; |
812 | ||
813 | if (port->sm_vars & AD_PORT_BEGIN) { | |
3bf2d28a | 814 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
815 | } else { |
816 | switch (port->sm_mux_state) { | |
817 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
818 | if ((port->sm_vars & AD_PORT_SELECTED) |
819 | || (port->sm_vars & AD_PORT_STANDBY)) | |
820 | /* if SELECTED or STANDBY */ | |
3bf2d28a | 821 | port->sm_mux_state = AD_MUX_WAITING; |
1da177e4 LT |
822 | break; |
823 | case AD_MUX_WAITING: | |
3bf2d28a VF |
824 | /* if SELECTED == FALSE return to DETACH state */ |
825 | if (!(port->sm_vars & AD_PORT_SELECTED)) { | |
1da177e4 | 826 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
827 | /* in order to withhold the Selection Logic to |
828 | * check all ports READY_N value every callback | |
829 | * cycle to update ready variable, we check | |
830 | * READY_N and update READY here | |
831 | */ | |
1da177e4 | 832 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 833 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
834 | break; |
835 | } | |
836 | ||
3bf2d28a | 837 | /* check if the wait_while_timer expired */ |
7bfc4753 BD |
838 | if (port->sm_mux_timer_counter |
839 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 840 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 | 841 | |
3bf2d28a VF |
842 | /* in order to withhold the selection logic to check |
843 | * all ports READY_N value every callback cycle to | |
844 | * update ready variable, we check READY_N and update | |
845 | * READY here | |
846 | */ | |
1da177e4 LT |
847 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
848 | ||
3bf2d28a VF |
849 | /* if the wait_while_timer expired, and the port is |
850 | * in READY state, move to ATTACHED state | |
851 | */ | |
7bfc4753 BD |
852 | if ((port->sm_vars & AD_PORT_READY) |
853 | && !port->sm_mux_timer_counter) | |
3bf2d28a | 854 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 LT |
855 | break; |
856 | case AD_MUX_ATTACHED: | |
3bf2d28a VF |
857 | /* check also if agg_select_timer expired (so the |
858 | * edable port will take place only after this timer) | |
859 | */ | |
860 | if ((port->sm_vars & AD_PORT_SELECTED) && | |
861 | (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && | |
862 | !__check_agg_selection_timer(port)) { | |
863 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING; | |
864 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || | |
865 | (port->sm_vars & AD_PORT_STANDBY)) { | |
866 | /* if UNSELECTED or STANDBY */ | |
1da177e4 | 867 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
868 | /* in order to withhold the selection logic to |
869 | * check all ports READY_N value every callback | |
870 | * cycle to update ready variable, we check | |
871 | * READY_N and update READY here | |
872 | */ | |
1da177e4 | 873 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 874 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
875 | } |
876 | break; | |
877 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
3bf2d28a VF |
878 | if (!(port->sm_vars & AD_PORT_SELECTED) || |
879 | (port->sm_vars & AD_PORT_STANDBY) || | |
880 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) { | |
881 | port->sm_mux_state = AD_MUX_ATTACHED; | |
1da177e4 | 882 | } else { |
3bf2d28a VF |
883 | /* if port state hasn't changed make |
884 | * sure that a collecting distributing | |
885 | * port in an active aggregator is enabled | |
886 | */ | |
1da177e4 LT |
887 | if (port->aggregator && |
888 | port->aggregator->is_active && | |
889 | !__port_is_enabled(port)) { | |
890 | ||
891 | __enable_port(port); | |
892 | } | |
893 | } | |
894 | break; | |
3bf2d28a | 895 | default: |
1da177e4 LT |
896 | break; |
897 | } | |
898 | } | |
899 | ||
3bf2d28a | 900 | /* check if the state machine was changed */ |
1da177e4 | 901 | if (port->sm_mux_state != last_state) { |
a4aee5c8 JP |
902 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
903 | port->actor_port_number, last_state, | |
904 | port->sm_mux_state); | |
1da177e4 LT |
905 | switch (port->sm_mux_state) { |
906 | case AD_MUX_DETACHED: | |
1da177e4 | 907 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
ee637714 MB |
908 | ad_disable_collecting_distributing(port, |
909 | update_slave_arr); | |
1da177e4 LT |
910 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; |
911 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 912 | port->ntt = true; |
1da177e4 LT |
913 | break; |
914 | case AD_MUX_WAITING: | |
915 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
916 | break; | |
917 | case AD_MUX_ATTACHED: | |
1da177e4 LT |
918 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; |
919 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
920 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
ee637714 MB |
921 | ad_disable_collecting_distributing(port, |
922 | update_slave_arr); | |
d238d458 | 923 | port->ntt = true; |
1da177e4 LT |
924 | break; |
925 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
926 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
927 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
ee637714 MB |
928 | ad_enable_collecting_distributing(port, |
929 | update_slave_arr); | |
d238d458 | 930 | port->ntt = true; |
1da177e4 | 931 | break; |
3bf2d28a | 932 | default: |
1da177e4 LT |
933 | break; |
934 | } | |
935 | } | |
936 | } | |
937 | ||
938 | /** | |
939 | * ad_rx_machine - handle a port's rx State Machine | |
940 | * @lacpdu: the lacpdu we've received | |
941 | * @port: the port we're looking at | |
942 | * | |
943 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
944 | * CURRENT. If timer expired set the state machine in the proper state. | |
945 | * In other cases, this function checks if we need to switch to other state. | |
946 | */ | |
947 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
948 | { | |
949 | rx_states_t last_state; | |
950 | ||
3bf2d28a VF |
951 | /* keep current State Machine state to compare later if it was |
952 | * changed | |
953 | */ | |
1da177e4 LT |
954 | last_state = port->sm_rx_state; |
955 | ||
3bf2d28a VF |
956 | /* check if state machine should change state */ |
957 | ||
958 | /* first, check if port was reinitialized */ | |
7bfc4753 | 959 | if (port->sm_vars & AD_PORT_BEGIN) |
7bfc4753 | 960 | port->sm_rx_state = AD_RX_INITIALIZE; |
3bf2d28a | 961 | /* check if port is not enabled */ |
7bfc4753 BD |
962 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
963 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
7bfc4753 | 964 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
3bf2d28a VF |
965 | /* check if new lacpdu arrived */ |
966 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || | |
967 | (port->sm_rx_state == AD_RX_DEFAULTED) || | |
968 | (port->sm_rx_state == AD_RX_CURRENT))) { | |
969 | port->sm_rx_timer_counter = 0; | |
1da177e4 LT |
970 | port->sm_rx_state = AD_RX_CURRENT; |
971 | } else { | |
3bf2d28a VF |
972 | /* if timer is on, and if it is expired */ |
973 | if (port->sm_rx_timer_counter && | |
974 | !(--port->sm_rx_timer_counter)) { | |
1da177e4 LT |
975 | switch (port->sm_rx_state) { |
976 | case AD_RX_EXPIRED: | |
3bf2d28a | 977 | port->sm_rx_state = AD_RX_DEFAULTED; |
1da177e4 LT |
978 | break; |
979 | case AD_RX_CURRENT: | |
3bf2d28a | 980 | port->sm_rx_state = AD_RX_EXPIRED; |
1da177e4 | 981 | break; |
3bf2d28a | 982 | default: |
1da177e4 LT |
983 | break; |
984 | } | |
985 | } else { | |
3bf2d28a | 986 | /* if no lacpdu arrived and no timer is on */ |
1da177e4 LT |
987 | switch (port->sm_rx_state) { |
988 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 989 | if (port->sm_vars & AD_PORT_MOVED) |
3bf2d28a | 990 | port->sm_rx_state = AD_RX_INITIALIZE; |
7bfc4753 BD |
991 | else if (port->is_enabled |
992 | && (port->sm_vars | |
993 | & AD_PORT_LACP_ENABLED)) | |
3bf2d28a | 994 | port->sm_rx_state = AD_RX_EXPIRED; |
7bfc4753 BD |
995 | else if (port->is_enabled |
996 | && ((port->sm_vars | |
997 | & AD_PORT_LACP_ENABLED) == 0)) | |
3bf2d28a | 998 | port->sm_rx_state = AD_RX_LACP_DISABLED; |
1da177e4 | 999 | break; |
3bf2d28a | 1000 | default: |
1da177e4 LT |
1001 | break; |
1002 | ||
1003 | } | |
1004 | } | |
1005 | } | |
1006 | ||
3bf2d28a | 1007 | /* check if the State machine was changed or new lacpdu arrived */ |
1da177e4 | 1008 | if ((port->sm_rx_state != last_state) || (lacpdu)) { |
a4aee5c8 JP |
1009 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1010 | port->actor_port_number, last_state, | |
1011 | port->sm_rx_state); | |
1da177e4 LT |
1012 | switch (port->sm_rx_state) { |
1013 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1014 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1015 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1016 | else |
1da177e4 | 1017 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1018 | port->sm_vars &= ~AD_PORT_SELECTED; |
1019 | __record_default(port); | |
1020 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1021 | port->sm_vars &= ~AD_PORT_MOVED; | |
3bf2d28a | 1022 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
1da177e4 | 1023 | |
3bf2d28a | 1024 | /* Fall Through */ |
1da177e4 LT |
1025 | case AD_RX_PORT_DISABLED: |
1026 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1027 | break; | |
1028 | case AD_RX_LACP_DISABLED: | |
1029 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1030 | __record_default(port); | |
1055c9ab | 1031 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1032 | port->sm_vars |= AD_PORT_MATCHED; |
1033 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1034 | break; | |
1035 | case AD_RX_EXPIRED: | |
3bf2d28a VF |
1036 | /* Reset of the Synchronization flag (Standard 43.4.12) |
1037 | * This reset cause to disable this port in the | |
1038 | * COLLECTING_DISTRIBUTING state of the mux machine in | |
1039 | * case of EXPIRED even if LINK_DOWN didn't arrive for | |
1040 | * the port. | |
1041 | */ | |
1055c9ab | 1042 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1043 | port->sm_vars &= ~AD_PORT_MATCHED; |
3bf2d28a | 1044 | port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; |
1da177e4 LT |
1045 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1046 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1047 | break; | |
1048 | case AD_RX_DEFAULTED: | |
1049 | __update_default_selected(port); | |
1050 | __record_default(port); | |
1051 | port->sm_vars |= AD_PORT_MATCHED; | |
1052 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1053 | break; | |
1054 | case AD_RX_CURRENT: | |
815117ad | 1055 | /* detect loopback situation */ |
3bf2d28a VF |
1056 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), |
1057 | &(port->actor_system))) { | |
d4471f5e | 1058 | netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" |
90194264 | 1059 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", |
3bf2d28a | 1060 | port->slave->dev->name); |
1da177e4 LT |
1061 | return; |
1062 | } | |
1063 | __update_selected(lacpdu, port); | |
1064 | __update_ntt(lacpdu, port); | |
1065 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1066 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1067 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 | 1068 | break; |
3bf2d28a | 1069 | default: |
1da177e4 LT |
1070 | break; |
1071 | } | |
1072 | } | |
1da177e4 LT |
1073 | } |
1074 | ||
1075 | /** | |
1076 | * ad_tx_machine - handle a port's tx state machine | |
1077 | * @port: the port we're looking at | |
1da177e4 LT |
1078 | */ |
1079 | static void ad_tx_machine(struct port *port) | |
1080 | { | |
3bf2d28a VF |
1081 | /* check if tx timer expired, to verify that we do not send more than |
1082 | * 3 packets per second | |
1083 | */ | |
1da177e4 | 1084 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { |
3bf2d28a | 1085 | /* check if there is something to send */ |
1da177e4 LT |
1086 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { |
1087 | __update_lacpdu_from_port(port); | |
d238d458 | 1088 | |
1da177e4 | 1089 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1090 | pr_debug("Sent LACPDU on port %d\n", |
1091 | port->actor_port_number); | |
d238d458 | 1092 | |
3bf2d28a VF |
1093 | /* mark ntt as false, so it will not be sent |
1094 | * again until demanded | |
1095 | */ | |
d238d458 | 1096 | port->ntt = false; |
1da177e4 LT |
1097 | } |
1098 | } | |
3bf2d28a VF |
1099 | /* restart tx timer(to verify that we will not exceed |
1100 | * AD_MAX_TX_IN_SECOND | |
1101 | */ | |
1102 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1103 | } |
1104 | } | |
1105 | ||
1106 | /** | |
1107 | * ad_periodic_machine - handle a port's periodic state machine | |
1108 | * @port: the port we're looking at | |
1109 | * | |
1110 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1111 | */ | |
1112 | static void ad_periodic_machine(struct port *port) | |
1113 | { | |
1114 | periodic_states_t last_state; | |
1115 | ||
3bf2d28a | 1116 | /* keep current state machine state to compare later if it was changed */ |
1da177e4 LT |
1117 | last_state = port->sm_periodic_state; |
1118 | ||
3bf2d28a | 1119 | /* check if port was reinitialized */ |
1da177e4 | 1120 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || |
1055c9ab | 1121 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 | 1122 | ) { |
3bf2d28a | 1123 | port->sm_periodic_state = AD_NO_PERIODIC; |
1da177e4 | 1124 | } |
3bf2d28a | 1125 | /* check if state machine should change state */ |
1da177e4 | 1126 | else if (port->sm_periodic_timer_counter) { |
3bf2d28a | 1127 | /* check if periodic state machine expired */ |
1da177e4 | 1128 | if (!(--port->sm_periodic_timer_counter)) { |
3bf2d28a VF |
1129 | /* if expired then do tx */ |
1130 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1da177e4 | 1131 | } else { |
3bf2d28a VF |
1132 | /* If not expired, check if there is some new timeout |
1133 | * parameter from the partner state | |
1134 | */ | |
1da177e4 LT |
1135 | switch (port->sm_periodic_state) { |
1136 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1137 | if (!(port->partner_oper.port_state |
1138 | & AD_STATE_LACP_TIMEOUT)) | |
3bf2d28a | 1139 | port->sm_periodic_state = AD_SLOW_PERIODIC; |
1da177e4 LT |
1140 | break; |
1141 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1142 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 | 1143 | port->sm_periodic_timer_counter = 0; |
3bf2d28a | 1144 | port->sm_periodic_state = AD_PERIODIC_TX; |
1da177e4 LT |
1145 | } |
1146 | break; | |
3bf2d28a | 1147 | default: |
1da177e4 LT |
1148 | break; |
1149 | } | |
1150 | } | |
1151 | } else { | |
1152 | switch (port->sm_periodic_state) { | |
1153 | case AD_NO_PERIODIC: | |
3bf2d28a | 1154 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 LT |
1155 | break; |
1156 | case AD_PERIODIC_TX: | |
3bf2d28a VF |
1157 | if (!(port->partner_oper.port_state & |
1158 | AD_STATE_LACP_TIMEOUT)) | |
1159 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
7bfc4753 | 1160 | else |
3bf2d28a | 1161 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 | 1162 | break; |
3bf2d28a | 1163 | default: |
1da177e4 LT |
1164 | break; |
1165 | } | |
1166 | } | |
1167 | ||
3bf2d28a | 1168 | /* check if the state machine was changed */ |
1da177e4 | 1169 | if (port->sm_periodic_state != last_state) { |
a4aee5c8 JP |
1170 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1171 | port->actor_port_number, last_state, | |
1172 | port->sm_periodic_state); | |
1da177e4 LT |
1173 | switch (port->sm_periodic_state) { |
1174 | case AD_NO_PERIODIC: | |
3bf2d28a | 1175 | port->sm_periodic_timer_counter = 0; |
1da177e4 LT |
1176 | break; |
1177 | case AD_FAST_PERIODIC: | |
3bf2d28a VF |
1178 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1179 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; | |
1da177e4 LT |
1180 | break; |
1181 | case AD_SLOW_PERIODIC: | |
3bf2d28a VF |
1182 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1183 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; | |
1da177e4 LT |
1184 | break; |
1185 | case AD_PERIODIC_TX: | |
d238d458 | 1186 | port->ntt = true; |
1da177e4 | 1187 | break; |
3bf2d28a | 1188 | default: |
1da177e4 LT |
1189 | break; |
1190 | } | |
1191 | } | |
1192 | } | |
1193 | ||
1194 | /** | |
1195 | * ad_port_selection_logic - select aggregation groups | |
1196 | * @port: the port we're looking at | |
ee637714 | 1197 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1198 | * |
1199 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1200 | * selection logic is called in the inititalization (after all the handshkes), | |
1201 | * and after every lacpdu receive (if selected is off). | |
1202 | */ | |
ee637714 | 1203 | static void ad_port_selection_logic(struct port *port, bool *update_slave_arr) |
1da177e4 LT |
1204 | { |
1205 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1206 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1207 | struct list_head *iter; |
1208 | struct bonding *bond; | |
1209 | struct slave *slave; | |
1da177e4 LT |
1210 | int found = 0; |
1211 | ||
3bf2d28a | 1212 | /* if the port is already Selected, do nothing */ |
7bfc4753 | 1213 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1214 | return; |
1da177e4 | 1215 | |
3e36bb75 VF |
1216 | bond = __get_bond_by_port(port); |
1217 | ||
3bf2d28a | 1218 | /* if the port is connected to other aggregator, detach it */ |
1da177e4 | 1219 | if (port->aggregator) { |
3bf2d28a | 1220 | /* detach the port from its former aggregator */ |
128ea6c3 BD |
1221 | temp_aggregator = port->aggregator; |
1222 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1223 | last_port = curr_port, | |
3bf2d28a | 1224 | curr_port = curr_port->next_port_in_aggregator) { |
1da177e4 LT |
1225 | if (curr_port == port) { |
1226 | temp_aggregator->num_of_ports--; | |
3bf2d28a VF |
1227 | /* if it is the first port attached to the |
1228 | * aggregator | |
1229 | */ | |
1230 | if (!last_port) { | |
128ea6c3 BD |
1231 | temp_aggregator->lag_ports = |
1232 | port->next_port_in_aggregator; | |
3bf2d28a VF |
1233 | } else { |
1234 | /* not the first port attached to the | |
1235 | * aggregator | |
1236 | */ | |
128ea6c3 BD |
1237 | last_port->next_port_in_aggregator = |
1238 | port->next_port_in_aggregator; | |
1da177e4 LT |
1239 | } |
1240 | ||
3bf2d28a VF |
1241 | /* clear the port's relations to this |
1242 | * aggregator | |
1243 | */ | |
1da177e4 | 1244 | port->aggregator = NULL; |
128ea6c3 BD |
1245 | port->next_port_in_aggregator = NULL; |
1246 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1247 | |
d4471f5e VF |
1248 | netdev_dbg(bond->dev, "Port %d left LAG %d\n", |
1249 | port->actor_port_number, | |
1250 | temp_aggregator->aggregator_identifier); | |
3bf2d28a VF |
1251 | /* if the aggregator is empty, clear its |
1252 | * parameters, and set it ready to be attached | |
1253 | */ | |
7bfc4753 | 1254 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1255 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1256 | break; |
1257 | } | |
1258 | } | |
3bf2d28a VF |
1259 | if (!curr_port) { |
1260 | /* meaning: the port was related to an aggregator | |
1261 | * but was not on the aggregator port list | |
1262 | */ | |
d4471f5e VF |
1263 | net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
1264 | port->slave->bond->dev->name, | |
1265 | port->actor_port_number, | |
1266 | port->slave->dev->name, | |
1267 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1268 | } |
1269 | } | |
3bf2d28a | 1270 | /* search on all aggregators for a suitable aggregator for this port */ |
3e36bb75 | 1271 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 1272 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 | 1273 | |
3bf2d28a | 1274 | /* keep a free aggregator for later use(if needed) */ |
1da177e4 | 1275 | if (!aggregator->lag_ports) { |
7bfc4753 | 1276 | if (!free_aggregator) |
128ea6c3 | 1277 | free_aggregator = aggregator; |
1da177e4 LT |
1278 | continue; |
1279 | } | |
815117ad | 1280 | /* check if current aggregator suits us */ |
1281 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1282 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1055c9ab HE |
1283 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
1284 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1285 | ) && |
815117ad | 1286 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
1287 | !aggregator->is_individual) /* but is not individual OR */ | |
1da177e4 LT |
1288 | ) |
1289 | ) { | |
815117ad | 1290 | /* attach to the founded aggregator */ |
1da177e4 | 1291 | port->aggregator = aggregator; |
128ea6c3 BD |
1292 | port->actor_port_aggregator_identifier = |
1293 | port->aggregator->aggregator_identifier; | |
1294 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1295 | port->aggregator->num_of_ports++; |
128ea6c3 | 1296 | aggregator->lag_ports = port; |
d4471f5e VF |
1297 | netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", |
1298 | port->actor_port_number, | |
1299 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1300 | |
3bf2d28a | 1301 | /* mark this port as selected */ |
1da177e4 LT |
1302 | port->sm_vars |= AD_PORT_SELECTED; |
1303 | found = 1; | |
1304 | break; | |
1305 | } | |
1306 | } | |
1307 | ||
3bf2d28a VF |
1308 | /* the port couldn't find an aggregator - attach it to a new |
1309 | * aggregator | |
1310 | */ | |
1da177e4 LT |
1311 | if (!found) { |
1312 | if (free_aggregator) { | |
3bf2d28a | 1313 | /* assign port a new aggregator */ |
1da177e4 | 1314 | port->aggregator = free_aggregator; |
128ea6c3 BD |
1315 | port->actor_port_aggregator_identifier = |
1316 | port->aggregator->aggregator_identifier; | |
1da177e4 | 1317 | |
3bf2d28a VF |
1318 | /* update the new aggregator's parameters |
1319 | * if port was responsed from the end-user | |
1320 | */ | |
7bfc4753 BD |
1321 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1322 | /* if port is full duplex */ | |
1624db7b | 1323 | port->aggregator->is_individual = false; |
7bfc4753 | 1324 | else |
1624db7b | 1325 | port->aggregator->is_individual = true; |
1da177e4 LT |
1326 | |
1327 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1328 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1329 | port->aggregator->partner_system = |
1330 | port->partner_oper.system; | |
1331 | port->aggregator->partner_system_priority = | |
1332 | port->partner_oper.system_priority; | |
1055c9ab | 1333 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1334 | port->aggregator->receive_state = 1; |
1335 | port->aggregator->transmit_state = 1; | |
1336 | port->aggregator->lag_ports = port; | |
1337 | port->aggregator->num_of_ports++; | |
1338 | ||
3bf2d28a | 1339 | /* mark this port as selected */ |
1da177e4 LT |
1340 | port->sm_vars |= AD_PORT_SELECTED; |
1341 | ||
d4471f5e VF |
1342 | netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", |
1343 | port->actor_port_number, | |
1344 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1345 | } else { |
d4471f5e | 1346 | netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", |
1da177e4 LT |
1347 | port->actor_port_number, port->slave->dev->name); |
1348 | } | |
1349 | } | |
3bf2d28a VF |
1350 | /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE |
1351 | * in all aggregator's ports, else set ready=FALSE in all | |
1352 | * aggregator's ports | |
1353 | */ | |
1354 | __set_agg_ports_ready(port->aggregator, | |
1355 | __agg_ports_are_ready(port->aggregator)); | |
1da177e4 | 1356 | |
fd989c83 | 1357 | aggregator = __get_first_agg(port); |
ee637714 | 1358 | ad_agg_selection_logic(aggregator, update_slave_arr); |
fd989c83 JV |
1359 | } |
1360 | ||
3bf2d28a | 1361 | /* Decide if "agg" is a better choice for the new active aggregator that |
fd989c83 JV |
1362 | * the current best, according to the ad_select policy. |
1363 | */ | |
1364 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1365 | struct aggregator *curr) | |
1366 | { | |
3bf2d28a | 1367 | /* 0. If no best, select current. |
fd989c83 JV |
1368 | * |
1369 | * 1. If the current agg is not individual, and the best is | |
1370 | * individual, select current. | |
1371 | * | |
1372 | * 2. If current agg is individual and the best is not, keep best. | |
1373 | * | |
1374 | * 3. Therefore, current and best are both individual or both not | |
1375 | * individual, so: | |
1376 | * | |
1377 | * 3a. If current agg partner replied, and best agg partner did not, | |
1378 | * select current. | |
1379 | * | |
1380 | * 3b. If current agg partner did not reply and best agg partner | |
1381 | * did reply, keep best. | |
1382 | * | |
1383 | * 4. Therefore, current and best both have partner replies or | |
1384 | * both do not, so perform selection policy: | |
1385 | * | |
1386 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1387 | * select by bandwidth. | |
1388 | * | |
1389 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1390 | */ | |
1391 | if (!best) | |
1392 | return curr; | |
1393 | ||
1394 | if (!curr->is_individual && best->is_individual) | |
1395 | return curr; | |
1396 | ||
1397 | if (curr->is_individual && !best->is_individual) | |
1398 | return best; | |
1399 | ||
1400 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1401 | return curr; | |
1402 | ||
1403 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1404 | return best; | |
1405 | ||
1406 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1407 | case BOND_AD_COUNT: | |
1408 | if (curr->num_of_ports > best->num_of_ports) | |
1409 | return curr; | |
1410 | ||
1411 | if (curr->num_of_ports < best->num_of_ports) | |
1412 | return best; | |
1413 | ||
1414 | /*FALLTHROUGH*/ | |
1415 | case BOND_AD_STABLE: | |
1416 | case BOND_AD_BANDWIDTH: | |
1417 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1418 | return curr; | |
1419 | ||
1420 | break; | |
1421 | ||
1422 | default: | |
d4471f5e VF |
1423 | net_warn_ratelimited("%s: Impossible agg select mode %d\n", |
1424 | curr->slave->bond->dev->name, | |
1425 | __get_agg_selection_mode(curr->lag_ports)); | |
fd989c83 | 1426 | break; |
1da177e4 | 1427 | } |
fd989c83 JV |
1428 | |
1429 | return best; | |
1da177e4 LT |
1430 | } |
1431 | ||
4cd6fe1c SH |
1432 | static int agg_device_up(const struct aggregator *agg) |
1433 | { | |
2430af8b | 1434 | struct port *port = agg->lag_ports; |
3bf2d28a | 1435 | |
2430af8b JB |
1436 | if (!port) |
1437 | return 0; | |
3bf2d28a VF |
1438 | |
1439 | return netif_running(port->slave->dev) && | |
1440 | netif_carrier_ok(port->slave->dev); | |
4cd6fe1c SH |
1441 | } |
1442 | ||
1da177e4 LT |
1443 | /** |
1444 | * ad_agg_selection_logic - select an aggregation group for a team | |
1445 | * @aggregator: the aggregator we're looking at | |
ee637714 | 1446 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1447 | * |
1448 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1449 | * |
1450 | * The logic of this function is to select the aggregator according to | |
1451 | * the ad_select policy: | |
1452 | * | |
1453 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1454 | * it, and to reselect the active aggregator only if the previous | |
1455 | * aggregator has no more ports related to it. | |
1456 | * | |
1457 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1458 | * bandwidth, and reselect whenever a link state change takes place or the | |
1459 | * set of slaves in the bond changes. | |
1460 | * | |
1461 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1462 | * (slaves), and reselect whenever a link state change takes place or the | |
1463 | * set of slaves in the bond changes. | |
1da177e4 LT |
1464 | * |
1465 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1466 | * __get_active_agg() won't work correctly. This function should be better | |
1467 | * called with the bond itself, and retrieve the first agg from it. | |
1468 | */ | |
ee637714 MB |
1469 | static void ad_agg_selection_logic(struct aggregator *agg, |
1470 | bool *update_slave_arr) | |
1da177e4 | 1471 | { |
fd989c83 | 1472 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1473 | struct bonding *bond = agg->slave->bond; |
1474 | struct list_head *iter; | |
1475 | struct slave *slave; | |
1da177e4 | 1476 | struct port *port; |
1da177e4 | 1477 | |
49b7624e | 1478 | rcu_read_lock(); |
fd989c83 | 1479 | origin = agg; |
fd989c83 | 1480 | active = __get_active_agg(agg); |
4cd6fe1c | 1481 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1482 | |
be79bd04 | 1483 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1484 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
bef1fcce | 1485 | |
fd989c83 JV |
1486 | agg->is_active = 0; |
1487 | ||
4cd6fe1c | 1488 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1489 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1490 | } |
fd989c83 JV |
1491 | |
1492 | if (best && | |
1493 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
3bf2d28a | 1494 | /* For the STABLE policy, don't replace the old active |
fd989c83 JV |
1495 | * aggregator if it's still active (it has an answering |
1496 | * partner) or if both the best and active don't have an | |
1497 | * answering partner. | |
1498 | */ | |
1499 | if (active && active->lag_ports && | |
1500 | active->lag_ports->is_enabled && | |
1501 | (__agg_has_partner(active) || | |
3bf2d28a VF |
1502 | (!__agg_has_partner(active) && |
1503 | !__agg_has_partner(best)))) { | |
fd989c83 JV |
1504 | if (!(!active->actor_oper_aggregator_key && |
1505 | best->actor_oper_aggregator_key)) { | |
1506 | best = NULL; | |
1507 | active->is_active = 1; | |
1da177e4 LT |
1508 | } |
1509 | } | |
fd989c83 | 1510 | } |
1da177e4 | 1511 | |
fd989c83 JV |
1512 | if (best && (best == active)) { |
1513 | best = NULL; | |
1514 | active->is_active = 1; | |
1da177e4 LT |
1515 | } |
1516 | ||
be79bd04 | 1517 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1518 | if (best) { |
d4471f5e VF |
1519 | netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1520 | best->aggregator_identifier, best->num_of_ports, | |
1521 | best->actor_oper_aggregator_key, | |
1522 | best->partner_oper_aggregator_key, | |
1523 | best->is_individual, best->is_active); | |
1524 | netdev_dbg(bond->dev, "best ports %p slave %p %s\n", | |
1525 | best->lag_ports, best->slave, | |
1526 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1527 | |
be79bd04 | 1528 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1529 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
fd989c83 | 1530 | |
d4471f5e VF |
1531 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1532 | agg->aggregator_identifier, agg->num_of_ports, | |
1533 | agg->actor_oper_aggregator_key, | |
1534 | agg->partner_oper_aggregator_key, | |
1535 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1536 | } |
1537 | ||
be79bd04 | 1538 | /* check if any partner replys */ |
fd989c83 | 1539 | if (best->is_individual) { |
d4471f5e VF |
1540 | net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
1541 | best->slave ? | |
1542 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1543 | } |
1544 | ||
fd989c83 | 1545 | best->is_active = 1; |
d4471f5e VF |
1546 | netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", |
1547 | best->aggregator_identifier); | |
1548 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1549 | best->aggregator_identifier, best->num_of_ports, | |
1550 | best->actor_oper_aggregator_key, | |
1551 | best->partner_oper_aggregator_key, | |
1552 | best->is_individual, best->is_active); | |
1da177e4 | 1553 | |
3bf2d28a VF |
1554 | /* disable the ports that were related to the former |
1555 | * active_aggregator | |
1556 | */ | |
fd989c83 JV |
1557 | if (active) { |
1558 | for (port = active->lag_ports; port; | |
1559 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1560 | __disable_port(port); |
1561 | } | |
1562 | } | |
ee637714 MB |
1563 | /* Slave array needs update. */ |
1564 | *update_slave_arr = true; | |
1da177e4 LT |
1565 | } |
1566 | ||
3bf2d28a | 1567 | /* if the selected aggregator is of join individuals |
fd989c83 JV |
1568 | * (partner_system is NULL), enable their ports |
1569 | */ | |
1570 | active = __get_active_agg(origin); | |
1da177e4 | 1571 | |
fd989c83 JV |
1572 | if (active) { |
1573 | if (!__agg_has_partner(active)) { | |
1574 | for (port = active->lag_ports; port; | |
1575 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1576 | __enable_port(port); |
1577 | } | |
1578 | } | |
1579 | } | |
fd989c83 | 1580 | |
be79bd04 | 1581 | rcu_read_unlock(); |
1582 | ||
bef1fcce | 1583 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1584 | } |
1585 | ||
1586 | /** | |
1587 | * ad_clear_agg - clear a given aggregator's parameters | |
1588 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1589 | */ |
1590 | static void ad_clear_agg(struct aggregator *aggregator) | |
1591 | { | |
1592 | if (aggregator) { | |
1624db7b | 1593 | aggregator->is_individual = false; |
1da177e4 LT |
1594 | aggregator->actor_admin_aggregator_key = 0; |
1595 | aggregator->actor_oper_aggregator_key = 0; | |
1596 | aggregator->partner_system = null_mac_addr; | |
1597 | aggregator->partner_system_priority = 0; | |
1598 | aggregator->partner_oper_aggregator_key = 0; | |
1599 | aggregator->receive_state = 0; | |
1600 | aggregator->transmit_state = 0; | |
1601 | aggregator->lag_ports = NULL; | |
1602 | aggregator->is_active = 0; | |
1603 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1604 | pr_debug("LAG %d was cleared\n", |
1605 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1606 | } |
1607 | } | |
1608 | ||
1609 | /** | |
1610 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1611 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1612 | */ |
1613 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1614 | { | |
1615 | if (aggregator) { | |
1616 | ad_clear_agg(aggregator); | |
1617 | ||
1618 | aggregator->aggregator_mac_address = null_mac_addr; | |
1619 | aggregator->aggregator_identifier = 0; | |
1620 | aggregator->slave = NULL; | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | /** | |
1625 | * ad_initialize_port - initialize a given port's parameters | |
1626 | * @aggregator: the aggregator we're looking at | |
1627 | * @lacp_fast: boolean. whether fast periodic should be used | |
1da177e4 LT |
1628 | */ |
1629 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1630 | { | |
c7e703d0 HE |
1631 | static const struct port_params tmpl = { |
1632 | .system_priority = 0xffff, | |
1633 | .key = 1, | |
1634 | .port_number = 1, | |
1635 | .port_priority = 0xff, | |
1636 | .port_state = 1, | |
1637 | }; | |
7addeef6 HE |
1638 | static const struct lacpdu lacpdu = { |
1639 | .subtype = 0x01, | |
1640 | .version_number = 0x01, | |
1641 | .tlv_type_actor_info = 0x01, | |
1642 | .actor_information_length = 0x14, | |
1643 | .tlv_type_partner_info = 0x02, | |
1644 | .partner_information_length = 0x14, | |
1645 | .tlv_type_collector_info = 0x03, | |
1646 | .collector_information_length = 0x10, | |
1647 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1648 | }; | |
c7e703d0 | 1649 | |
1da177e4 LT |
1650 | if (port) { |
1651 | port->actor_port_number = 1; | |
1652 | port->actor_port_priority = 0xff; | |
1653 | port->actor_system = null_mac_addr; | |
1654 | port->actor_system_priority = 0xffff; | |
1655 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1656 | port->ntt = false; |
1da177e4 LT |
1657 | port->actor_admin_port_key = 1; |
1658 | port->actor_oper_port_key = 1; | |
3bf2d28a VF |
1659 | port->actor_admin_port_state = AD_STATE_AGGREGATION | |
1660 | AD_STATE_LACP_ACTIVITY; | |
1661 | port->actor_oper_port_state = AD_STATE_AGGREGATION | | |
1662 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 | 1663 | |
7bfc4753 | 1664 | if (lacp_fast) |
1da177e4 | 1665 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1666 | |
c7e703d0 HE |
1667 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1668 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1669 | ||
f48127b6 | 1670 | port->is_enabled = true; |
3bf2d28a | 1671 | /* private parameters */ |
1da177e4 LT |
1672 | port->sm_vars = 0x3; |
1673 | port->sm_rx_state = 0; | |
1674 | port->sm_rx_timer_counter = 0; | |
1675 | port->sm_periodic_state = 0; | |
1676 | port->sm_periodic_timer_counter = 0; | |
1677 | port->sm_mux_state = 0; | |
1678 | port->sm_mux_timer_counter = 0; | |
1679 | port->sm_tx_state = 0; | |
1680 | port->sm_tx_timer_counter = 0; | |
1681 | port->slave = NULL; | |
1682 | port->aggregator = NULL; | |
1683 | port->next_port_in_aggregator = NULL; | |
1684 | port->transaction_id = 0; | |
1685 | ||
7addeef6 | 1686 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1687 | } |
1688 | } | |
1689 | ||
1690 | /** | |
1691 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1692 | * @port: the port we're looking at | |
ee637714 | 1693 | * @update_slave_arr: Does slave array need update? |
1da177e4 LT |
1694 | * |
1695 | * Enable @port if it's in an active aggregator | |
1696 | */ | |
ee637714 MB |
1697 | static void ad_enable_collecting_distributing(struct port *port, |
1698 | bool *update_slave_arr) | |
1da177e4 LT |
1699 | { |
1700 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1701 | pr_debug("Enabling port %d(LAG %d)\n", |
1702 | port->actor_port_number, | |
1703 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1704 | __enable_port(port); |
ee637714 MB |
1705 | /* Slave array needs update */ |
1706 | *update_slave_arr = true; | |
1da177e4 LT |
1707 | } |
1708 | } | |
1709 | ||
1710 | /** | |
1711 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1712 | * @port: the port we're looking at | |
ee637714 | 1713 | * @update_slave_arr: Does slave array need update? |
1da177e4 | 1714 | */ |
ee637714 MB |
1715 | static void ad_disable_collecting_distributing(struct port *port, |
1716 | bool *update_slave_arr) | |
1da177e4 | 1717 | { |
3bf2d28a VF |
1718 | if (port->aggregator && |
1719 | !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), | |
1720 | &(null_mac_addr))) { | |
a4aee5c8 JP |
1721 | pr_debug("Disabling port %d(LAG %d)\n", |
1722 | port->actor_port_number, | |
1723 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1724 | __disable_port(port); |
ee637714 MB |
1725 | /* Slave array needs an update */ |
1726 | *update_slave_arr = true; | |
1da177e4 LT |
1727 | } |
1728 | } | |
1729 | ||
1da177e4 LT |
1730 | /** |
1731 | * ad_marker_info_received - handle receive of a Marker information frame | |
1732 | * @marker_info: Marker info received | |
1733 | * @port: the port we're looking at | |
1da177e4 | 1734 | */ |
1c3f0b8e MD |
1735 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1736 | struct port *port) | |
1da177e4 | 1737 | { |
1c3f0b8e | 1738 | struct bond_marker marker; |
1da177e4 | 1739 | |
3bf2d28a | 1740 | /* copy the received marker data to the response marker */ |
1c3f0b8e | 1741 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
3bf2d28a | 1742 | /* change the marker subtype to marker response */ |
128ea6c3 | 1743 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 | 1744 | |
3bf2d28a | 1745 | /* send the marker response */ |
1da177e4 | 1746 | if (ad_marker_send(port, &marker) >= 0) { |
a4aee5c8 JP |
1747 | pr_debug("Sent Marker Response on port %d\n", |
1748 | port->actor_port_number); | |
1da177e4 LT |
1749 | } |
1750 | } | |
1751 | ||
1752 | /** | |
1753 | * ad_marker_response_received - handle receive of a marker response frame | |
1754 | * @marker: marker PDU received | |
1755 | * @port: the port we're looking at | |
1756 | * | |
1757 | * This function does nothing since we decided not to implement send and handle | |
1758 | * response for marker PDU's, in this stage, but only to respond to marker | |
1759 | * information. | |
1760 | */ | |
1c3f0b8e | 1761 | static void ad_marker_response_received(struct bond_marker *marker, |
3bf2d28a | 1762 | struct port *port) |
1da177e4 | 1763 | { |
3bf2d28a VF |
1764 | marker = NULL; |
1765 | port = NULL; | |
1766 | /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ | |
1da177e4 LT |
1767 | } |
1768 | ||
3bf2d28a | 1769 | /* ========= AD exported functions to the main bonding code ========= */ |
1da177e4 | 1770 | |
3bf2d28a | 1771 | /* Check aggregators status in team every T seconds */ |
1da177e4 LT |
1772 | #define AD_AGGREGATOR_SELECTION_TIMER 8 |
1773 | ||
3bf2d28a VF |
1774 | /** |
1775 | * bond_3ad_initiate_agg_selection - initate aggregator selection | |
1776 | * @bond: bonding struct | |
fd989c83 JV |
1777 | * |
1778 | * Set the aggregation selection timer, to initiate an agg selection in | |
1779 | * the very near future. Called during first initialization, and during | |
1780 | * any down to up transitions of the bond. | |
1781 | */ | |
1782 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1783 | { | |
1784 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1785 | } |
1786 | ||
1da177e4 LT |
1787 | /** |
1788 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1789 | * @bond: bonding struct to work on | |
1790 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1791 | * |
1792 | * Can be called only after the mac address of the bond is set. | |
1793 | */ | |
56d00c67 | 1794 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1795 | { |
815117ad | 1796 | /* check that the bond is not initialized yet */ |
1797 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
3a6d54c5 | 1798 | bond->dev->dev_addr)) { |
1da177e4 | 1799 | |
163c8ff3 | 1800 | BOND_AD_INFO(bond).aggregator_identifier = 0; |
1da177e4 | 1801 | |
1da177e4 LT |
1802 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1803 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1804 | ||
3bf2d28a VF |
1805 | /* initialize how many times this module is called in one |
1806 | * second (should be about every 100ms) | |
1807 | */ | |
1da177e4 LT |
1808 | ad_ticks_per_sec = tick_resolution; |
1809 | ||
fd989c83 JV |
1810 | bond_3ad_initiate_agg_selection(bond, |
1811 | AD_AGGREGATOR_SELECTION_TIMER * | |
1812 | ad_ticks_per_sec); | |
1da177e4 LT |
1813 | } |
1814 | } | |
1815 | ||
1816 | /** | |
1817 | * bond_3ad_bind_slave - initialize a slave's port | |
1818 | * @slave: slave struct to work on | |
1819 | * | |
1820 | * Returns: 0 on success | |
1821 | * < 0 on error | |
1822 | */ | |
359632e5 | 1823 | void bond_3ad_bind_slave(struct slave *slave) |
1da177e4 LT |
1824 | { |
1825 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1826 | struct port *port; | |
1827 | struct aggregator *aggregator; | |
1828 | ||
359632e5 | 1829 | /* check that the slave has not been initialized yet. */ |
3fdddd85 | 1830 | if (SLAVE_AD_INFO(slave)->port.slave != slave) { |
1da177e4 | 1831 | |
359632e5 | 1832 | /* port initialization */ |
3fdddd85 | 1833 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 1834 | |
bf0239a9 | 1835 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 LT |
1836 | |
1837 | port->slave = slave; | |
3fdddd85 | 1838 | port->actor_port_number = SLAVE_AD_INFO(slave)->id; |
359632e5 | 1839 | /* key is determined according to the link speed, duplex and user key(which |
1840 | * is yet not supported) | |
359632e5 | 1841 | */ |
3bf2d28a | 1842 | port->actor_admin_port_key = 0; |
1da177e4 LT |
1843 | port->actor_admin_port_key |= __get_duplex(port); |
1844 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1845 | port->actor_oper_port_key = port->actor_admin_port_key; | |
3bf2d28a VF |
1846 | /* if the port is not full duplex, then the port should be not |
1847 | * lacp Enabled | |
1848 | */ | |
7bfc4753 | 1849 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1850 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
359632e5 | 1851 | /* actor system is the bond's system */ |
1da177e4 | 1852 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; |
3bf2d28a VF |
1853 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND |
1854 | * lacpdu's are sent in one second) | |
1855 | */ | |
1da177e4 LT |
1856 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
1857 | port->aggregator = NULL; | |
1858 | port->next_port_in_aggregator = NULL; | |
1859 | ||
1860 | __disable_port(port); | |
1da177e4 | 1861 | |
359632e5 | 1862 | /* aggregator initialization */ |
3fdddd85 | 1863 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 LT |
1864 | |
1865 | ad_initialize_agg(aggregator); | |
1866 | ||
1867 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
163c8ff3 | 1868 | aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; |
1da177e4 LT |
1869 | aggregator->slave = slave; |
1870 | aggregator->is_active = 0; | |
1871 | aggregator->num_of_ports = 0; | |
1872 | } | |
1da177e4 LT |
1873 | } |
1874 | ||
1875 | /** | |
1876 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1877 | * @slave: slave struct to work on | |
1878 | * | |
1879 | * Search for the aggregator that is related to this port, remove the | |
1880 | * aggregator and assign another aggregator for other port related to it | |
1881 | * (if any), and remove the port. | |
1882 | */ | |
1883 | void bond_3ad_unbind_slave(struct slave *slave) | |
1884 | { | |
1885 | struct port *port, *prev_port, *temp_port; | |
1886 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1887 | int select_new_active_agg = 0; | |
0b088264 VF |
1888 | struct bonding *bond = slave->bond; |
1889 | struct slave *slave_iter; | |
1890 | struct list_head *iter; | |
ee637714 | 1891 | bool dummy_slave_update; /* Ignore this value as caller updates array */ |
a361c83c | 1892 | |
e470259f NA |
1893 | /* Sync against bond_3ad_state_machine_handler() */ |
1894 | spin_lock_bh(&bond->mode_lock); | |
3fdddd85 | 1895 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1896 | port = &(SLAVE_AD_INFO(slave)->port); | |
1da177e4 | 1897 | |
3bf2d28a | 1898 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 1899 | if (!port->slave) { |
d4471f5e VF |
1900 | netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", |
1901 | slave->dev->name); | |
e470259f | 1902 | goto out; |
1da177e4 LT |
1903 | } |
1904 | ||
d4471f5e VF |
1905 | netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", |
1906 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1907 | |
1908 | /* Tell the partner that this port is not suitable for aggregation */ | |
1909 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1910 | __update_lacpdu_from_port(port); | |
1911 | ad_lacpdu_send(port); | |
1912 | ||
3bf2d28a | 1913 | /* check if this aggregator is occupied */ |
1da177e4 | 1914 | if (aggregator->lag_ports) { |
3bf2d28a VF |
1915 | /* check if there are other ports related to this aggregator |
1916 | * except the port related to this slave(thats ensure us that | |
1917 | * there is a reason to search for new aggregator, and that we | |
1918 | * will find one | |
1919 | */ | |
1920 | if ((aggregator->lag_ports != port) || | |
1921 | (aggregator->lag_ports->next_port_in_aggregator)) { | |
1922 | /* find new aggregator for the related port(s) */ | |
0b088264 | 1923 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 1924 | new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
3bf2d28a VF |
1925 | /* if the new aggregator is empty, or it is |
1926 | * connected to our port only | |
1927 | */ | |
1928 | if (!new_aggregator->lag_ports || | |
1929 | ((new_aggregator->lag_ports == port) && | |
1930 | !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 1931 | break; |
1da177e4 | 1932 | } |
0b088264 VF |
1933 | if (!slave_iter) |
1934 | new_aggregator = NULL; | |
3bf2d28a VF |
1935 | |
1936 | /* if new aggregator found, copy the aggregator's | |
1937 | * parameters and connect the related lag_ports to the | |
1938 | * new aggregator | |
1939 | */ | |
1da177e4 | 1940 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { |
d4471f5e VF |
1941 | netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", |
1942 | aggregator->aggregator_identifier, | |
1943 | new_aggregator->aggregator_identifier); | |
1da177e4 | 1944 | |
3bf2d28a VF |
1945 | if ((new_aggregator->lag_ports == port) && |
1946 | new_aggregator->is_active) { | |
d4471f5e | 1947 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
1da177e4 LT |
1948 | select_new_active_agg = 1; |
1949 | } | |
1950 | ||
1951 | new_aggregator->is_individual = aggregator->is_individual; | |
1952 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
1953 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
1954 | new_aggregator->partner_system = aggregator->partner_system; | |
1955 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
1956 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
1957 | new_aggregator->receive_state = aggregator->receive_state; | |
1958 | new_aggregator->transmit_state = aggregator->transmit_state; | |
1959 | new_aggregator->lag_ports = aggregator->lag_ports; | |
1960 | new_aggregator->is_active = aggregator->is_active; | |
1961 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
1962 | ||
3bf2d28a VF |
1963 | /* update the information that is written on |
1964 | * the ports about the aggregator | |
1965 | */ | |
128ea6c3 BD |
1966 | for (temp_port = aggregator->lag_ports; temp_port; |
1967 | temp_port = temp_port->next_port_in_aggregator) { | |
1968 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
1969 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
1970 | } | |
1971 | ||
1da177e4 | 1972 | ad_clear_agg(aggregator); |
a361c83c | 1973 | |
7bfc4753 | 1974 | if (select_new_active_agg) |
ee637714 MB |
1975 | ad_agg_selection_logic(__get_first_agg(port), |
1976 | &dummy_slave_update); | |
1da177e4 | 1977 | } else { |
d4471f5e | 1978 | netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); |
1da177e4 | 1979 | } |
3bf2d28a VF |
1980 | } else { |
1981 | /* in case that the only port related to this | |
1982 | * aggregator is the one we want to remove | |
1983 | */ | |
1da177e4 | 1984 | select_new_active_agg = aggregator->is_active; |
1da177e4 LT |
1985 | ad_clear_agg(aggregator); |
1986 | if (select_new_active_agg) { | |
d4471f5e | 1987 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 1988 | /* select new active aggregator */ |
74684493 VF |
1989 | temp_aggregator = __get_first_agg(port); |
1990 | if (temp_aggregator) | |
ee637714 MB |
1991 | ad_agg_selection_logic(temp_aggregator, |
1992 | &dummy_slave_update); | |
1da177e4 LT |
1993 | } |
1994 | } | |
1995 | } | |
1996 | ||
d4471f5e | 1997 | netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); |
3bf2d28a VF |
1998 | |
1999 | /* find the aggregator that this port is connected to */ | |
0b088264 | 2000 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 2001 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
1da177e4 | 2002 | prev_port = NULL; |
3bf2d28a | 2003 | /* search the port in the aggregator's related ports */ |
128ea6c3 BD |
2004 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2005 | prev_port = temp_port, | |
3bf2d28a VF |
2006 | temp_port = temp_port->next_port_in_aggregator) { |
2007 | if (temp_port == port) { | |
2008 | /* the aggregator found - detach the port from | |
2009 | * this aggregator | |
2010 | */ | |
7bfc4753 | 2011 | if (prev_port) |
1da177e4 | 2012 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2013 | else |
1da177e4 | 2014 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2015 | temp_aggregator->num_of_ports--; |
128ea6c3 | 2016 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 | 2017 | select_new_active_agg = temp_aggregator->is_active; |
1da177e4 LT |
2018 | ad_clear_agg(temp_aggregator); |
2019 | if (select_new_active_agg) { | |
d4471f5e | 2020 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 2021 | /* select new active aggregator */ |
ee637714 MB |
2022 | ad_agg_selection_logic(__get_first_agg(port), |
2023 | &dummy_slave_update); | |
1da177e4 LT |
2024 | } |
2025 | } | |
2026 | break; | |
2027 | } | |
2028 | } | |
2029 | } | |
128ea6c3 | 2030 | port->slave = NULL; |
e470259f NA |
2031 | |
2032 | out: | |
2033 | spin_unlock_bh(&bond->mode_lock); | |
1da177e4 LT |
2034 | } |
2035 | ||
2036 | /** | |
2037 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2038 | * @bond: bonding struct to work on | |
2039 | * | |
2040 | * The state machine handling concept in this module is to check every tick | |
2041 | * which state machine should operate any function. The execution order is | |
2042 | * round robin, so when we have an interaction between state machines, the | |
2043 | * reply of one to each other might be delayed until next tick. | |
2044 | * | |
2045 | * This function also complete the initialization when the agg_select_timer | |
2046 | * times out, and it selects an aggregator for the ports that are yet not | |
2047 | * related to any aggregator, and selects the active aggregator for a bond. | |
2048 | */ | |
1b76b316 | 2049 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2050 | { |
1b76b316 JV |
2051 | struct bonding *bond = container_of(work, struct bonding, |
2052 | ad_work.work); | |
1da177e4 | 2053 | struct aggregator *aggregator; |
3c4c88a1 VF |
2054 | struct list_head *iter; |
2055 | struct slave *slave; | |
2056 | struct port *port; | |
5e5b0665 | 2057 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
ee637714 | 2058 | bool update_slave_arr = false; |
1da177e4 | 2059 | |
e470259f NA |
2060 | /* Lock to protect data accessed by all (e.g., port->sm_vars) and |
2061 | * against running with bond_3ad_unbind_slave. ad_rx_machine may run | |
2062 | * concurrently due to incoming LACPDU as well. | |
2063 | */ | |
b7435628 | 2064 | spin_lock_bh(&bond->mode_lock); |
be79bd04 | 2065 | rcu_read_lock(); |
1f2cd845 | 2066 | |
be79bd04 | 2067 | /* check if there are any slaves */ |
0965a1f3 | 2068 | if (!bond_has_slaves(bond)) |
1da177e4 | 2069 | goto re_arm; |
1da177e4 | 2070 | |
be79bd04 | 2071 | /* check if agg_select_timer timer after initialize is timed out */ |
3bf2d28a VF |
2072 | if (BOND_AD_INFO(bond).agg_select_timer && |
2073 | !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
be79bd04 | 2074 | slave = bond_first_slave_rcu(bond); |
3fdddd85 | 2075 | port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; |
fe9323da | 2076 | |
be79bd04 | 2077 | /* select the active aggregator for the bond */ |
fe9323da | 2078 | if (port) { |
1da177e4 | 2079 | if (!port->slave) { |
d4471f5e VF |
2080 | net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", |
2081 | bond->dev->name); | |
1da177e4 LT |
2082 | goto re_arm; |
2083 | } | |
2084 | ||
2085 | aggregator = __get_first_agg(port); | |
ee637714 | 2086 | ad_agg_selection_logic(aggregator, &update_slave_arr); |
1da177e4 | 2087 | } |
f0c76d61 | 2088 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2089 | } |
2090 | ||
be79bd04 | 2091 | /* for each port run the state machines */ |
2092 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3fdddd85 | 2093 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2094 | if (!port->slave) { |
d4471f5e | 2095 | net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", |
86a2b9cf | 2096 | bond->dev->name); |
1da177e4 LT |
2097 | goto re_arm; |
2098 | } | |
2099 | ||
2100 | ad_rx_machine(NULL, port); | |
2101 | ad_periodic_machine(port); | |
ee637714 MB |
2102 | ad_port_selection_logic(port, &update_slave_arr); |
2103 | ad_mux_machine(port, &update_slave_arr); | |
1da177e4 LT |
2104 | ad_tx_machine(port); |
2105 | ||
be79bd04 | 2106 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2107 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2108 | port->sm_vars &= ~AD_PORT_BEGIN; |
1da177e4 LT |
2109 | } |
2110 | ||
2111 | re_arm: | |
5e5b0665 | 2112 | bond_for_each_slave_rcu(bond, slave, iter) { |
2113 | if (slave->should_notify) { | |
2114 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2115 | break; | |
2116 | } | |
2117 | } | |
be79bd04 | 2118 | rcu_read_unlock(); |
b7435628 | 2119 | spin_unlock_bh(&bond->mode_lock); |
5e5b0665 | 2120 | |
ee637714 MB |
2121 | if (update_slave_arr) |
2122 | bond_slave_arr_work_rearm(bond, 0); | |
2123 | ||
5e5b0665 | 2124 | if (should_notify_rtnl && rtnl_trylock()) { |
b0929915 | 2125 | bond_slave_state_notify(bond); |
5e5b0665 | 2126 | rtnl_unlock(); |
2127 | } | |
be79bd04 | 2128 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2129 | } |
2130 | ||
2131 | /** | |
2132 | * bond_3ad_rx_indication - handle a received frame | |
2133 | * @lacpdu: received lacpdu | |
2134 | * @slave: slave struct to work on | |
2135 | * @length: length of the data received | |
2136 | * | |
2137 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2138 | * received frames (loopback). Since only the payload is given to this | |
2139 | * function, it check for loopback. | |
2140 | */ | |
3bf2d28a VF |
2141 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, |
2142 | u16 length) | |
1da177e4 LT |
2143 | { |
2144 | struct port *port; | |
13a8e0c8 | 2145 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2146 | |
2147 | if (length >= sizeof(struct lacpdu)) { | |
2148 | ||
3fdddd85 | 2149 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2150 | |
2151 | if (!port->slave) { | |
d4471f5e VF |
2152 | net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", |
2153 | slave->dev->name, slave->bond->dev->name); | |
13a8e0c8 | 2154 | return ret; |
1da177e4 LT |
2155 | } |
2156 | ||
2157 | switch (lacpdu->subtype) { | |
2158 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2159 | ret = RX_HANDLER_CONSUMED; |
d4471f5e VF |
2160 | netdev_dbg(slave->bond->dev, "Received LACPDU on port %d\n", |
2161 | port->actor_port_number); | |
16d79d7d | 2162 | /* Protect against concurrent state machines */ |
e470259f | 2163 | spin_lock(&slave->bond->mode_lock); |
1da177e4 | 2164 | ad_rx_machine(lacpdu, port); |
e470259f | 2165 | spin_unlock(&slave->bond->mode_lock); |
1da177e4 LT |
2166 | break; |
2167 | ||
2168 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2169 | ret = RX_HANDLER_CONSUMED; |
3bf2d28a VF |
2170 | /* No need to convert fields to Little Endian since we |
2171 | * don't use the marker's fields. | |
2172 | */ | |
1da177e4 | 2173 | |
1c3f0b8e | 2174 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2175 | case AD_MARKER_INFORMATION_SUBTYPE: |
d4471f5e VF |
2176 | netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", |
2177 | port->actor_port_number); | |
1c3f0b8e | 2178 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2179 | break; |
2180 | ||
2181 | case AD_MARKER_RESPONSE_SUBTYPE: | |
d4471f5e VF |
2182 | netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", |
2183 | port->actor_port_number); | |
1c3f0b8e | 2184 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2185 | break; |
2186 | ||
2187 | default: | |
d4471f5e VF |
2188 | netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", |
2189 | port->actor_port_number); | |
1da177e4 LT |
2190 | } |
2191 | } | |
2192 | } | |
13a8e0c8 | 2193 | return ret; |
1da177e4 LT |
2194 | } |
2195 | ||
2196 | /** | |
2197 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2198 | * @slave: slave struct to work on | |
2199 | * | |
2200 | * Handle reselection of aggregator (if needed) for this port. | |
2201 | */ | |
2202 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2203 | { | |
2204 | struct port *port; | |
2205 | ||
3fdddd85 | 2206 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2207 | |
71a06c59 | 2208 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2209 | if (!port->slave) { |
d4471f5e VF |
2210 | netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", |
2211 | slave->dev->name); | |
1da177e4 LT |
2212 | return; |
2213 | } | |
2214 | ||
e470259f | 2215 | spin_lock_bh(&slave->bond->mode_lock); |
71a06c59 | 2216 | |
1da177e4 | 2217 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2218 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2219 | (__get_link_speed(port) << 1); | |
d4471f5e | 2220 | netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); |
71a06c59 | 2221 | /* there is no need to reselect a new aggregator, just signal the |
2222 | * state machines to reinitialize | |
2223 | */ | |
1da177e4 | 2224 | port->sm_vars |= AD_PORT_BEGIN; |
71a06c59 | 2225 | |
e470259f | 2226 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2227 | } |
2228 | ||
2229 | /** | |
2230 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2231 | * @slave: slave struct to work on | |
2232 | * | |
2233 | * Handle reselection of aggregator (if needed) for this port. | |
2234 | */ | |
2235 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2236 | { | |
2237 | struct port *port; | |
2238 | ||
3fdddd85 | 2239 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2240 | |
bca44a73 | 2241 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2242 | if (!port->slave) { |
d4471f5e VF |
2243 | netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", |
2244 | slave->dev->name); | |
1da177e4 LT |
2245 | return; |
2246 | } | |
2247 | ||
e470259f | 2248 | spin_lock_bh(&slave->bond->mode_lock); |
bca44a73 | 2249 | |
1da177e4 | 2250 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2251 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2252 | __get_duplex(port); | |
d4471f5e | 2253 | netdev_dbg(slave->bond->dev, "Port %d changed duplex\n", port->actor_port_number); |
bca44a73 | 2254 | /* there is no need to reselect a new aggregator, just signal the |
2255 | * state machines to reinitialize | |
2256 | */ | |
1da177e4 | 2257 | port->sm_vars |= AD_PORT_BEGIN; |
bca44a73 | 2258 | |
e470259f | 2259 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2260 | } |
2261 | ||
2262 | /** | |
2263 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2264 | * @slave: slave struct to work on | |
2265 | * @status: whether the link is now up or down | |
2266 | * | |
2267 | * Handle reselection of aggregator (if needed) for this port. | |
2268 | */ | |
2269 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2270 | { | |
2271 | struct port *port; | |
2272 | ||
3fdddd85 | 2273 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2274 | |
108db736 | 2275 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2276 | if (!port->slave) { |
d4471f5e VF |
2277 | netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", |
2278 | slave->dev->name); | |
1da177e4 LT |
2279 | return; |
2280 | } | |
2281 | ||
e470259f | 2282 | spin_lock_bh(&slave->bond->mode_lock); |
108db736 | 2283 | /* on link down we are zeroing duplex and speed since |
2284 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2285 | * instead of N/A(duplex) / 0(speed). | |
2286 | * | |
2287 | * on link up we are forcing recheck on the duplex and speed since | |
2288 | * some of he adaptors(ce1000.lan) report. | |
2289 | */ | |
1da177e4 | 2290 | if (link == BOND_LINK_UP) { |
f48127b6 | 2291 | port->is_enabled = true; |
1da177e4 | 2292 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2293 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2294 | __get_duplex(port); | |
1da177e4 | 2295 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2296 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2297 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2298 | } else { |
2299 | /* link has failed */ | |
f48127b6 | 2300 | port->is_enabled = false; |
1da177e4 | 2301 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2302 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2303 | ~AD_SPEED_KEY_BITS); | |
1da177e4 | 2304 | } |
d4471f5e VF |
2305 | netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", |
2306 | port->actor_port_number, | |
2307 | link == BOND_LINK_UP ? "UP" : "DOWN"); | |
108db736 | 2308 | /* there is no need to reselect a new aggregator, just signal the |
2309 | * state machines to reinitialize | |
2310 | */ | |
1da177e4 | 2311 | port->sm_vars |= AD_PORT_BEGIN; |
108db736 | 2312 | |
e470259f | 2313 | spin_unlock_bh(&slave->bond->mode_lock); |
ee637714 MB |
2314 | |
2315 | /* RTNL is held and mode_lock is released so it's safe | |
2316 | * to update slave_array here. | |
2317 | */ | |
2318 | bond_update_slave_arr(slave->bond, NULL); | |
1da177e4 LT |
2319 | } |
2320 | ||
3bf2d28a VF |
2321 | /** |
2322 | * bond_3ad_set_carrier - set link state for bonding master | |
2323 | * @bond - bonding structure | |
2324 | * | |
2325 | * if we have an active aggregator, we're up, if not, we're down. | |
2326 | * Presumes that we cannot have an active aggregator if there are | |
2327 | * no slaves with link up. | |
ff59c456 | 2328 | * |
031ae4de JV |
2329 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2330 | * | |
ff59c456 JV |
2331 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2332 | * change, nonzero if it does. | |
2333 | */ | |
2334 | int bond_3ad_set_carrier(struct bonding *bond) | |
2335 | { | |
655f8919 | 2336 | struct aggregator *active; |
dec1e90e | 2337 | struct slave *first_slave; |
c1bc9644 | 2338 | int ret = 1; |
655f8919 | 2339 | |
be79bd04 | 2340 | rcu_read_lock(); |
2341 | first_slave = bond_first_slave_rcu(bond); | |
c1bc9644 VF |
2342 | if (!first_slave) { |
2343 | ret = 0; | |
2344 | goto out; | |
2345 | } | |
3fdddd85 | 2346 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); |
655f8919 | 2347 | if (active) { |
2348 | /* are enough slaves available to consider link up? */ | |
2349 | if (active->num_of_ports < bond->params.min_links) { | |
2350 | if (netif_carrier_ok(bond->dev)) { | |
2351 | netif_carrier_off(bond->dev); | |
c1bc9644 | 2352 | goto out; |
655f8919 | 2353 | } |
2354 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 | 2355 | netif_carrier_on(bond->dev); |
c1bc9644 | 2356 | goto out; |
ff59c456 | 2357 | } |
c1bc9644 | 2358 | } else if (netif_carrier_ok(bond->dev)) { |
ff59c456 | 2359 | netif_carrier_off(bond->dev); |
ff59c456 | 2360 | } |
c1bc9644 VF |
2361 | out: |
2362 | rcu_read_unlock(); | |
2363 | return ret; | |
ff59c456 JV |
2364 | } |
2365 | ||
1da177e4 | 2366 | /** |
318debd8 | 2367 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2368 | * @bond: bonding struct to work on |
2369 | * @ad_info: ad_info struct to fill with the bond's info | |
2370 | * | |
2371 | * Returns: 0 on success | |
2372 | * < 0 on error | |
2373 | */ | |
318debd8 | 2374 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2375 | struct ad_info *ad_info) | |
1da177e4 LT |
2376 | { |
2377 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2378 | struct list_head *iter; |
2379 | struct slave *slave; | |
1da177e4 LT |
2380 | struct port *port; |
2381 | ||
47e91f56 | 2382 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2383 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2384 | if (port->aggregator && port->aggregator->is_active) { |
2385 | aggregator = port->aggregator; | |
2386 | break; | |
2387 | } | |
2388 | } | |
2389 | ||
21f374c6 JP |
2390 | if (!aggregator) |
2391 | return -1; | |
2392 | ||
2393 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2394 | ad_info->ports = aggregator->num_of_ports; | |
2395 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2396 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2397 | ether_addr_copy(ad_info->partner_system, | |
2398 | aggregator->partner_system.mac_addr_value); | |
2399 | return 0; | |
1da177e4 LT |
2400 | } |
2401 | ||
318debd8 | 2402 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
2403 | { | |
2404 | int ret; | |
2405 | ||
47e91f56 | 2406 | rcu_read_lock(); |
318debd8 | 2407 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2408 | rcu_read_unlock(); |
318debd8 | 2409 | |
2410 | return ret; | |
2411 | } | |
2412 | ||
de063b70 ED |
2413 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2414 | struct slave *slave) | |
1da177e4 | 2415 | { |
de063b70 ED |
2416 | struct lacpdu *lacpdu, _lacpdu; |
2417 | ||
3aba891d | 2418 | if (skb->protocol != PKT_TYPE_LACPDU) |
86e74986 | 2419 | return RX_HANDLER_ANOTHER; |
b3053251 | 2420 | |
de063b70 ED |
2421 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2422 | if (!lacpdu) | |
86e74986 | 2423 | return RX_HANDLER_ANOTHER; |
ab12811c | 2424 | |
86e74986 | 2425 | return bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2426 | } |
ba824a8b | 2427 | |
3bf2d28a VF |
2428 | /** |
2429 | * bond_3ad_update_lacp_rate - change the lacp rate | |
2430 | * @bond - bonding struct | |
2431 | * | |
ba824a8b PP |
2432 | * When modify lacp_rate parameter via sysfs, |
2433 | * update actor_oper_port_state of each port. | |
2434 | * | |
e470259f | 2435 | * Hold bond->mode_lock, |
ba824a8b PP |
2436 | * so we can modify port->actor_oper_port_state, |
2437 | * no matter bond is up or down. | |
2438 | */ | |
2439 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2440 | { | |
ba824a8b | 2441 | struct port *port = NULL; |
9caff1e7 | 2442 | struct list_head *iter; |
c509316b | 2443 | struct slave *slave; |
ba824a8b PP |
2444 | int lacp_fast; |
2445 | ||
ba824a8b | 2446 | lacp_fast = bond->params.lacp_fast; |
e470259f | 2447 | spin_lock_bh(&bond->mode_lock); |
9caff1e7 | 2448 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 2449 | port = &(SLAVE_AD_INFO(slave)->port); |
ba824a8b PP |
2450 | if (lacp_fast) |
2451 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2452 | else | |
2453 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
ba824a8b | 2454 | } |
e470259f | 2455 | spin_unlock_bh(&bond->mode_lock); |
ba824a8b | 2456 | } |