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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> |
1da177e4 LT |
32 | #include "bonding.h" |
33 | #include "bond_3ad.h" | |
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); |
1da177e4 LT |
105 | static void ad_mux_machine(struct port *port); |
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); | |
109 | static void ad_port_selection_logic(struct port *port); | |
110 | static void ad_agg_selection_logic(struct aggregator *aggregator); | |
111 | static void ad_clear_agg(struct aggregator *aggregator); | |
112 | static void ad_initialize_agg(struct aggregator *aggregator); | |
113 | static void ad_initialize_port(struct port *port, int lacp_fast); | |
1da177e4 LT |
114 | static void ad_enable_collecting_distributing(struct port *port); |
115 | static void ad_disable_collecting_distributing(struct port *port); | |
3bf2d28a VF |
116 | static void ad_marker_info_received(struct bond_marker *marker_info, |
117 | struct port *port); | |
118 | static void ad_marker_response_received(struct bond_marker *marker, | |
119 | struct port *port); | |
1da177e4 LT |
120 | |
121 | ||
3bf2d28a | 122 | /* ================= api to bonding and kernel code ================== */ |
1da177e4 LT |
123 | |
124 | /** | |
125 | * __get_bond_by_port - get the port's bonding struct | |
126 | * @port: the port we're looking at | |
127 | * | |
128 | * Return @port's bonding struct, or %NULL if it can't be found. | |
129 | */ | |
130 | static inline struct bonding *__get_bond_by_port(struct port *port) | |
131 | { | |
7bfc4753 | 132 | if (port->slave == NULL) |
1da177e4 | 133 | return NULL; |
1da177e4 LT |
134 | |
135 | return bond_get_bond_by_slave(port->slave); | |
136 | } | |
137 | ||
1da177e4 LT |
138 | /** |
139 | * __get_first_agg - get the first aggregator in the bond | |
140 | * @bond: the bond we're looking at | |
141 | * | |
142 | * Return the aggregator of the first slave in @bond, or %NULL if it can't be | |
143 | * found. | |
768b9549 | 144 | * The caller must hold RCU or RTNL lock. |
1da177e4 LT |
145 | */ |
146 | static inline struct aggregator *__get_first_agg(struct port *port) | |
147 | { | |
148 | struct bonding *bond = __get_bond_by_port(port); | |
dec1e90e | 149 | struct slave *first_slave; |
768b9549 | 150 | struct aggregator *agg; |
1da177e4 | 151 | |
be79bd04 | 152 | /* If there's no bond for this port, or bond has no slaves */ |
dec1e90e | 153 | if (bond == NULL) |
1da177e4 | 154 | return NULL; |
3bf2d28a | 155 | |
be79bd04 | 156 | rcu_read_lock(); |
157 | first_slave = bond_first_slave_rcu(bond); | |
3fdddd85 | 158 | agg = first_slave ? &(SLAVE_AD_INFO(first_slave)->aggregator) : NULL; |
be79bd04 | 159 | rcu_read_unlock(); |
3bf2d28a | 160 | |
768b9549 | 161 | return agg; |
1da177e4 LT |
162 | } |
163 | ||
3bf2d28a VF |
164 | /** |
165 | * __agg_has_partner - see if we have a partner | |
166 | * @agg: the agregator we're looking at | |
fd989c83 JV |
167 | * |
168 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
3bf2d28a | 169 | * address for the partner). Return 0 if not. |
fd989c83 JV |
170 | */ |
171 | static inline int __agg_has_partner(struct aggregator *agg) | |
172 | { | |
173 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
174 | } | |
175 | ||
1da177e4 LT |
176 | /** |
177 | * __disable_port - disable the port's slave | |
178 | * @port: the port we're looking at | |
1da177e4 LT |
179 | */ |
180 | static inline void __disable_port(struct port *port) | |
181 | { | |
5e5b0665 | 182 | bond_set_slave_inactive_flags(port->slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
183 | } |
184 | ||
185 | /** | |
186 | * __enable_port - enable the port's slave, if it's up | |
187 | * @port: the port we're looking at | |
1da177e4 LT |
188 | */ |
189 | static inline void __enable_port(struct port *port) | |
190 | { | |
191 | struct slave *slave = port->slave; | |
192 | ||
b6adc610 | 193 | if ((slave->link == BOND_LINK_UP) && bond_slave_is_up(slave)) |
5e5b0665 | 194 | bond_set_slave_active_flags(slave, BOND_SLAVE_NOTIFY_LATER); |
1da177e4 LT |
195 | } |
196 | ||
197 | /** | |
198 | * __port_is_enabled - check if the port's slave is in active state | |
199 | * @port: the port we're looking at | |
1da177e4 LT |
200 | */ |
201 | static inline int __port_is_enabled(struct port *port) | |
202 | { | |
e30bc066 | 203 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
204 | } |
205 | ||
206 | /** | |
207 | * __get_agg_selection_mode - get the aggregator selection mode | |
208 | * @port: the port we're looking at | |
209 | * | |
fd989c83 | 210 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
211 | */ |
212 | static inline u32 __get_agg_selection_mode(struct port *port) | |
213 | { | |
214 | struct bonding *bond = __get_bond_by_port(port); | |
215 | ||
7bfc4753 | 216 | if (bond == NULL) |
fd989c83 | 217 | return BOND_AD_STABLE; |
1da177e4 | 218 | |
1a14fbcb | 219 | return bond->params.ad_select; |
1da177e4 LT |
220 | } |
221 | ||
222 | /** | |
223 | * __check_agg_selection_timer - check if the selection timer has expired | |
224 | * @port: the port we're looking at | |
1da177e4 LT |
225 | */ |
226 | static inline int __check_agg_selection_timer(struct port *port) | |
227 | { | |
228 | struct bonding *bond = __get_bond_by_port(port); | |
229 | ||
7bfc4753 | 230 | if (bond == NULL) |
1da177e4 | 231 | return 0; |
1da177e4 LT |
232 | |
233 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
234 | } | |
235 | ||
236 | /** | |
9ac3524a | 237 | * __get_state_machine_lock - lock the port's state machines |
1da177e4 | 238 | * @port: the port we're looking at |
1da177e4 | 239 | */ |
9ac3524a | 240 | static inline void __get_state_machine_lock(struct port *port) |
1da177e4 | 241 | { |
3fdddd85 | 242 | spin_lock_bh(&(SLAVE_AD_INFO(port->slave)->state_machine_lock)); |
1da177e4 LT |
243 | } |
244 | ||
245 | /** | |
9ac3524a | 246 | * __release_state_machine_lock - unlock the port's state machines |
1da177e4 | 247 | * @port: the port we're looking at |
1da177e4 | 248 | */ |
9ac3524a | 249 | static inline void __release_state_machine_lock(struct port *port) |
1da177e4 | 250 | { |
3fdddd85 | 251 | spin_unlock_bh(&(SLAVE_AD_INFO(port->slave)->state_machine_lock)); |
1da177e4 LT |
252 | } |
253 | ||
254 | /** | |
255 | * __get_link_speed - get a port's speed | |
256 | * @port: the port we're looking at | |
257 | * | |
258 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
259 | * 0, | |
260 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
261 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
262 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
263 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
264 | */ |
265 | static u16 __get_link_speed(struct port *port) | |
266 | { | |
267 | struct slave *slave = port->slave; | |
268 | u16 speed; | |
269 | ||
3bf2d28a VF |
270 | /* this if covers only a special case: when the configuration starts |
271 | * with link down, it sets the speed to 0. | |
272 | * This is done in spite of the fact that the e100 driver reports 0 | |
273 | * to be compatible with MVT in the future. | |
274 | */ | |
7bfc4753 | 275 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 276 | speed = 0; |
7bfc4753 | 277 | else { |
1da177e4 LT |
278 | switch (slave->speed) { |
279 | case SPEED_10: | |
280 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
281 | break; | |
282 | ||
283 | case SPEED_100: | |
284 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
285 | break; | |
286 | ||
287 | case SPEED_1000: | |
288 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
289 | break; | |
290 | ||
94dbffd5 JV |
291 | case SPEED_10000: |
292 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
293 | break; | |
294 | ||
1da177e4 | 295 | default: |
3bf2d28a VF |
296 | /* unknown speed value from ethtool. shouldn't happen */ |
297 | speed = 0; | |
1da177e4 LT |
298 | break; |
299 | } | |
300 | } | |
301 | ||
d4471f5e VF |
302 | netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", |
303 | port->actor_port_number, speed); | |
1da177e4 LT |
304 | return speed; |
305 | } | |
306 | ||
307 | /** | |
308 | * __get_duplex - get a port's duplex | |
309 | * @port: the port we're looking at | |
310 | * | |
311 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
312 | * 0x01 if in full duplex | |
313 | * 0x00 otherwise | |
314 | */ | |
315 | static u8 __get_duplex(struct port *port) | |
316 | { | |
317 | struct slave *slave = port->slave; | |
318 | ||
319 | u8 retval; | |
320 | ||
3bf2d28a VF |
321 | /* handling a special case: when the configuration starts with |
322 | * link down, it sets the duplex to 0. | |
323 | */ | |
7bfc4753 | 324 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 325 | retval = 0x0; |
7bfc4753 | 326 | else { |
1da177e4 LT |
327 | switch (slave->duplex) { |
328 | case DUPLEX_FULL: | |
128ea6c3 | 329 | retval = 0x1; |
d4471f5e VF |
330 | netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", |
331 | port->actor_port_number); | |
1da177e4 LT |
332 | break; |
333 | case DUPLEX_HALF: | |
334 | default: | |
128ea6c3 | 335 | retval = 0x0; |
d4471f5e VF |
336 | netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", |
337 | port->actor_port_number); | |
1da177e4 LT |
338 | break; |
339 | } | |
340 | } | |
341 | return retval; | |
342 | } | |
343 | ||
344 | /** | |
9ac3524a | 345 | * __initialize_port_locks - initialize a port's STATE machine spinlock |
e0809dbc | 346 | * @port: the slave of the port we're looking at |
1da177e4 | 347 | */ |
e0809dbc | 348 | static inline void __initialize_port_locks(struct slave *slave) |
1da177e4 | 349 | { |
3bf2d28a | 350 | /* make sure it isn't called twice */ |
3fdddd85 | 351 | spin_lock_init(&(SLAVE_AD_INFO(slave)->state_machine_lock)); |
1da177e4 LT |
352 | } |
353 | ||
3bf2d28a | 354 | /* Conversions */ |
1da177e4 LT |
355 | |
356 | /** | |
357 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
358 | * @timer_type: which timer to operate | |
359 | * @par: timer parameter. see below | |
360 | * | |
361 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
362 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
3bf2d28a | 363 | * %SLOW_PERIODIC_TIME. |
1da177e4 LT |
364 | */ |
365 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
366 | { | |
128ea6c3 | 367 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
368 | |
369 | switch (timer_type) { | |
3bf2d28a | 370 | case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ |
7bfc4753 | 371 | if (par) |
3bf2d28a | 372 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); |
7bfc4753 | 373 | else |
3bf2d28a | 374 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); |
1da177e4 | 375 | break; |
3bf2d28a | 376 | case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ |
1da177e4 LT |
377 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
378 | break; | |
3bf2d28a VF |
379 | case AD_PERIODIC_TIMER: /* for periodic machine */ |
380 | retval = (par*ad_ticks_per_sec); /* long timeout */ | |
1da177e4 | 381 | break; |
3bf2d28a | 382 | case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ |
1da177e4 LT |
383 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
384 | break; | |
3bf2d28a | 385 | case AD_WAIT_WHILE_TIMER: /* for selection machine */ |
1da177e4 LT |
386 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); |
387 | break; | |
388 | } | |
3bf2d28a | 389 | |
1da177e4 LT |
390 | return retval; |
391 | } | |
392 | ||
393 | ||
3bf2d28a | 394 | /* ================= ad_rx_machine helper functions ================== */ |
1da177e4 | 395 | |
2d6682db JV |
396 | /** |
397 | * __choose_matched - update a port's matched variable from a received lacpdu | |
398 | * @lacpdu: the lacpdu we've received | |
399 | * @port: the port we're looking at | |
400 | * | |
401 | * Update the value of the matched variable, using parameter values from a | |
402 | * newly received lacpdu. Parameter values for the partner carried in the | |
403 | * received PDU are compared with the corresponding operational parameter | |
404 | * values for the actor. Matched is set to TRUE if all of these parameters | |
405 | * match and the PDU parameter partner_state.aggregation has the same value as | |
406 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
407 | * in the aggregation. Matched is also set to TRUE if the value of | |
408 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
409 | * an individual link and lacp will actively maintain the link. Otherwise, | |
410 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
411 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
412 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
413 | * partner_state.lacp_activity variables are TRUE. | |
414 | * | |
415 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
416 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
417 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
418 | */ | |
419 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
420 | { | |
815117ad | 421 | /* check if all parameters are alike |
422 | * or this is individual link(aggregation == FALSE) | |
423 | * then update the state machine Matched variable. | |
424 | */ | |
2d6682db JV |
425 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
426 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
815117ad | 427 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
2d6682db JV |
428 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
429 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
430 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
2d6682db JV |
431 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
432 | ) { | |
2d6682db JV |
433 | port->sm_vars |= AD_PORT_MATCHED; |
434 | } else { | |
435 | port->sm_vars &= ~AD_PORT_MATCHED; | |
436 | } | |
437 | } | |
438 | ||
1da177e4 LT |
439 | /** |
440 | * __record_pdu - record parameters from a received lacpdu | |
441 | * @lacpdu: the lacpdu we've received | |
442 | * @port: the port we're looking at | |
443 | * | |
444 | * Record the parameter values for the Actor carried in a received lacpdu as | |
445 | * the current partner operational parameter values and sets | |
446 | * actor_oper_port_state.defaulted to FALSE. | |
447 | */ | |
448 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
449 | { | |
1da177e4 | 450 | if (lacpdu && port) { |
b99d6ba9 HE |
451 | struct port_params *partner = &port->partner_oper; |
452 | ||
2d6682db | 453 | __choose_matched(lacpdu, port); |
3bf2d28a VF |
454 | /* record the new parameter values for the partner |
455 | * operational | |
456 | */ | |
b99d6ba9 HE |
457 | partner->port_number = ntohs(lacpdu->actor_port); |
458 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
459 | partner->system = lacpdu->actor_system; | |
460 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
461 | partner->key = ntohs(lacpdu->actor_key); | |
462 | partner->port_state = lacpdu->actor_state; | |
1da177e4 | 463 | |
3bf2d28a | 464 | /* set actor_oper_port_state.defaulted to FALSE */ |
1da177e4 LT |
465 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; |
466 | ||
3bf2d28a VF |
467 | /* set the partner sync. to on if the partner is sync, |
468 | * and the port is matched | |
469 | */ | |
7bfc4753 BD |
470 | if ((port->sm_vars & AD_PORT_MATCHED) |
471 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 472 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 473 | else |
b99d6ba9 | 474 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
475 | } |
476 | } | |
477 | ||
478 | /** | |
479 | * __record_default - record default parameters | |
480 | * @port: the port we're looking at | |
481 | * | |
482 | * This function records the default parameter values for the partner carried | |
483 | * in the Partner Admin parameters as the current partner operational parameter | |
484 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
485 | */ | |
486 | static void __record_default(struct port *port) | |
487 | { | |
1da177e4 | 488 | if (port) { |
3bf2d28a | 489 | /* record the partner admin parameters */ |
5eefd1ad HE |
490 | memcpy(&port->partner_oper, &port->partner_admin, |
491 | sizeof(struct port_params)); | |
1da177e4 | 492 | |
3bf2d28a | 493 | /* set actor_oper_port_state.defaulted to true */ |
1da177e4 LT |
494 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; |
495 | } | |
496 | } | |
497 | ||
498 | /** | |
499 | * __update_selected - update a port's Selected variable from a received lacpdu | |
500 | * @lacpdu: the lacpdu we've received | |
501 | * @port: the port we're looking at | |
502 | * | |
503 | * Update the value of the selected variable, using parameter values from a | |
504 | * newly received lacpdu. The parameter values for the Actor carried in the | |
505 | * received PDU are compared with the corresponding operational parameter | |
506 | * values for the ports partner. If one or more of the comparisons shows that | |
507 | * the value(s) received in the PDU differ from the current operational values, | |
508 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
509 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
510 | */ | |
511 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
512 | { | |
1da177e4 | 513 | if (lacpdu && port) { |
ce6a49ad HE |
514 | const struct port_params *partner = &port->partner_oper; |
515 | ||
815117ad | 516 | /* check if any parameter is different then |
517 | * update the state machine selected variable. | |
518 | */ | |
8e95a202 JP |
519 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
520 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
815117ad | 521 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
8e95a202 JP |
522 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
523 | ntohs(lacpdu->actor_key) != partner->key || | |
524 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
525 | port->sm_vars &= ~AD_PORT_SELECTED; |
526 | } | |
527 | } | |
528 | } | |
529 | ||
530 | /** | |
531 | * __update_default_selected - update a port's Selected variable from Partner | |
532 | * @port: the port we're looking at | |
533 | * | |
534 | * This function updates the value of the selected variable, using the partner | |
535 | * administrative parameter values. The administrative values are compared with | |
536 | * the corresponding operational parameter values for the partner. If one or | |
537 | * more of the comparisons shows that the administrative value(s) differ from | |
538 | * the current operational values, then Selected is set to FALSE and | |
539 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
540 | * Selected remains unchanged. | |
541 | */ | |
542 | static void __update_default_selected(struct port *port) | |
543 | { | |
1da177e4 | 544 | if (port) { |
3c52065f HE |
545 | const struct port_params *admin = &port->partner_admin; |
546 | const struct port_params *oper = &port->partner_oper; | |
547 | ||
815117ad | 548 | /* check if any parameter is different then |
549 | * update the state machine selected variable. | |
550 | */ | |
8e95a202 JP |
551 | if (admin->port_number != oper->port_number || |
552 | admin->port_priority != oper->port_priority || | |
815117ad | 553 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
8e95a202 JP |
554 | admin->system_priority != oper->system_priority || |
555 | admin->key != oper->key || | |
556 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 557 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
558 | port->sm_vars &= ~AD_PORT_SELECTED; |
559 | } | |
560 | } | |
561 | } | |
562 | ||
1da177e4 LT |
563 | /** |
564 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
565 | * @lacpdu: the lacpdu we've received | |
566 | * @port: the port we're looking at | |
567 | * | |
568 | * Updates the value of the ntt variable, using parameter values from a newly | |
569 | * received lacpdu. The parameter values for the partner carried in the | |
570 | * received PDU are compared with the corresponding operational parameter | |
571 | * values for the Actor. If one or more of the comparisons shows that the | |
572 | * value(s) received in the PDU differ from the current operational values, | |
573 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
574 | */ | |
575 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
576 | { | |
815117ad | 577 | /* validate lacpdu and port */ |
1da177e4 | 578 | if (lacpdu && port) { |
815117ad | 579 | /* check if any parameter is different then |
580 | * update the port->ntt. | |
581 | */ | |
89cc76f9 JV |
582 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
583 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
815117ad | 584 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
585 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
586 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
587 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
588 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
589 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
590 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
591 | ) { | |
d238d458 | 592 | port->ntt = true; |
1da177e4 LT |
593 | } |
594 | } | |
595 | } | |
596 | ||
1da177e4 LT |
597 | /** |
598 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
599 | * @aggregator: the aggregator we're looking at | |
600 | * | |
601 | */ | |
602 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
603 | { | |
604 | struct port *port; | |
605 | int retval = 1; | |
606 | ||
607 | if (aggregator) { | |
3bf2d28a VF |
608 | /* scan all ports in this aggregator to verfy if they are |
609 | * all ready. | |
610 | */ | |
128ea6c3 BD |
611 | for (port = aggregator->lag_ports; |
612 | port; | |
613 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
614 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
615 | retval = 0; | |
616 | break; | |
617 | } | |
618 | } | |
619 | } | |
620 | ||
621 | return retval; | |
622 | } | |
623 | ||
624 | /** | |
625 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
626 | * @aggregator: the aggregator we're looking at | |
627 | * @val: Should the ports' ready bit be set on or off | |
628 | * | |
629 | */ | |
630 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
631 | { | |
632 | struct port *port; | |
633 | ||
128ea6c3 BD |
634 | for (port = aggregator->lag_ports; port; |
635 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 636 | if (val) |
1da177e4 | 637 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 638 | else |
1da177e4 | 639 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
640 | } |
641 | } | |
642 | ||
643 | /** | |
644 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
645 | * @aggregator: the aggregator we're looking at | |
646 | * | |
647 | */ | |
648 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
649 | { | |
128ea6c3 | 650 | u32 bandwidth = 0; |
1da177e4 LT |
651 | |
652 | if (aggregator->num_of_ports) { | |
65cce19c | 653 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
654 | case AD_LINK_SPEED_BITMASK_1MBPS: |
655 | bandwidth = aggregator->num_of_ports; | |
656 | break; | |
657 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
658 | bandwidth = aggregator->num_of_ports * 10; | |
659 | break; | |
660 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
661 | bandwidth = aggregator->num_of_ports * 100; | |
662 | break; | |
663 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
664 | bandwidth = aggregator->num_of_ports * 1000; | |
665 | break; | |
94dbffd5 JV |
666 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
667 | bandwidth = aggregator->num_of_ports * 10000; | |
668 | break; | |
1da177e4 | 669 | default: |
3bf2d28a | 670 | bandwidth = 0; /* to silence the compiler */ |
1da177e4 LT |
671 | } |
672 | } | |
673 | return bandwidth; | |
674 | } | |
675 | ||
676 | /** | |
677 | * __get_active_agg - get the current active aggregator | |
678 | * @aggregator: the aggregator we're looking at | |
49b7624e VF |
679 | * |
680 | * Caller must hold RCU lock. | |
1da177e4 LT |
681 | */ |
682 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
683 | { | |
19177e7d VF |
684 | struct bonding *bond = aggregator->slave->bond; |
685 | struct list_head *iter; | |
686 | struct slave *slave; | |
1da177e4 | 687 | |
be79bd04 | 688 | bond_for_each_slave_rcu(bond, slave, iter) |
3fdddd85 | 689 | if (SLAVE_AD_INFO(slave)->aggregator.is_active) |
690 | return &(SLAVE_AD_INFO(slave)->aggregator); | |
1da177e4 | 691 | |
19177e7d | 692 | return NULL; |
1da177e4 LT |
693 | } |
694 | ||
695 | /** | |
696 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
697 | * @port: the port we're looking at | |
1da177e4 LT |
698 | */ |
699 | static inline void __update_lacpdu_from_port(struct port *port) | |
700 | { | |
701 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 702 | const struct port_params *partner = &port->partner_oper; |
1da177e4 | 703 | |
3bf2d28a VF |
704 | /* update current actual Actor parameters |
705 | * lacpdu->subtype initialized | |
1da177e4 LT |
706 | * lacpdu->version_number initialized |
707 | * lacpdu->tlv_type_actor_info initialized | |
708 | * lacpdu->actor_information_length initialized | |
709 | */ | |
710 | ||
d3bb52b0 | 711 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 712 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
713 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
714 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
715 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
716 | lacpdu->actor_state = port->actor_oper_port_state; |
717 | ||
718 | /* lacpdu->reserved_3_1 initialized | |
719 | * lacpdu->tlv_type_partner_info initialized | |
720 | * lacpdu->partner_information_length initialized | |
721 | */ | |
722 | ||
3b5b35d0 HE |
723 | lacpdu->partner_system_priority = htons(partner->system_priority); |
724 | lacpdu->partner_system = partner->system; | |
725 | lacpdu->partner_key = htons(partner->key); | |
726 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
727 | lacpdu->partner_port = htons(partner->port_number); | |
728 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
729 | |
730 | /* lacpdu->reserved_3_2 initialized | |
731 | * lacpdu->tlv_type_collector_info initialized | |
732 | * lacpdu->collector_information_length initialized | |
733 | * collector_max_delay initialized | |
734 | * reserved_12[12] initialized | |
735 | * tlv_type_terminator initialized | |
736 | * terminator_length initialized | |
737 | * reserved_50[50] initialized | |
738 | */ | |
1da177e4 LT |
739 | } |
740 | ||
3bf2d28a | 741 | /* ================= main 802.3ad protocol code ========================= */ |
1da177e4 LT |
742 | |
743 | /** | |
744 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
745 | * @port: the port we're looking at | |
746 | * | |
747 | * Returns: 0 on success | |
748 | * < 0 on error | |
749 | */ | |
750 | static int ad_lacpdu_send(struct port *port) | |
751 | { | |
752 | struct slave *slave = port->slave; | |
753 | struct sk_buff *skb; | |
754 | struct lacpdu_header *lacpdu_header; | |
755 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
756 | |
757 | skb = dev_alloc_skb(length); | |
7bfc4753 | 758 | if (!skb) |
1da177e4 | 759 | return -ENOMEM; |
1da177e4 LT |
760 | |
761 | skb->dev = slave->dev; | |
459a98ed | 762 | skb_reset_mac_header(skb); |
b0e380b1 | 763 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
764 | skb->protocol = PKT_TYPE_LACPDU; |
765 | skb->priority = TC_PRIO_CONTROL; | |
766 | ||
767 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
768 | ||
ada0f863 | 769 | ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 770 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
771 | * because we use it to identify loopback lacpdus in receive. |
772 | */ | |
ada0f863 | 773 | ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 774 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 775 | |
3bf2d28a | 776 | lacpdu_header->lacpdu = port->lacpdu; |
1da177e4 LT |
777 | |
778 | dev_queue_xmit(skb); | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | /** | |
784 | * ad_marker_send - send marker information/response on a given port | |
785 | * @port: the port we're looking at | |
786 | * @marker: marker data to send | |
787 | * | |
788 | * Returns: 0 on success | |
789 | * < 0 on error | |
790 | */ | |
1c3f0b8e | 791 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
792 | { |
793 | struct slave *slave = port->slave; | |
794 | struct sk_buff *skb; | |
1c3f0b8e MD |
795 | struct bond_marker_header *marker_header; |
796 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
797 | |
798 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 799 | if (!skb) |
1da177e4 | 800 | return -ENOMEM; |
1da177e4 LT |
801 | |
802 | skb_reserve(skb, 16); | |
803 | ||
804 | skb->dev = slave->dev; | |
459a98ed | 805 | skb_reset_mac_header(skb); |
b0e380b1 | 806 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
807 | skb->protocol = PKT_TYPE_LACPDU; |
808 | ||
1c3f0b8e | 809 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 810 | |
ada0f863 | 811 | ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 812 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
813 | * because we use it to identify loopback MARKERs in receive. |
814 | */ | |
ada0f863 | 815 | ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 816 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 817 | |
3bf2d28a | 818 | marker_header->marker = *marker; |
1da177e4 LT |
819 | |
820 | dev_queue_xmit(skb); | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | /** | |
826 | * ad_mux_machine - handle a port's mux state machine | |
827 | * @port: the port we're looking at | |
1da177e4 LT |
828 | */ |
829 | static void ad_mux_machine(struct port *port) | |
830 | { | |
831 | mux_states_t last_state; | |
832 | ||
3bf2d28a VF |
833 | /* keep current State Machine state to compare later if it was |
834 | * changed | |
835 | */ | |
1da177e4 LT |
836 | last_state = port->sm_mux_state; |
837 | ||
838 | if (port->sm_vars & AD_PORT_BEGIN) { | |
3bf2d28a | 839 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
840 | } else { |
841 | switch (port->sm_mux_state) { | |
842 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
843 | if ((port->sm_vars & AD_PORT_SELECTED) |
844 | || (port->sm_vars & AD_PORT_STANDBY)) | |
845 | /* if SELECTED or STANDBY */ | |
3bf2d28a | 846 | port->sm_mux_state = AD_MUX_WAITING; |
1da177e4 LT |
847 | break; |
848 | case AD_MUX_WAITING: | |
3bf2d28a VF |
849 | /* if SELECTED == FALSE return to DETACH state */ |
850 | if (!(port->sm_vars & AD_PORT_SELECTED)) { | |
1da177e4 | 851 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
852 | /* in order to withhold the Selection Logic to |
853 | * check all ports READY_N value every callback | |
854 | * cycle to update ready variable, we check | |
855 | * READY_N and update READY here | |
856 | */ | |
1da177e4 | 857 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 858 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
859 | break; |
860 | } | |
861 | ||
3bf2d28a | 862 | /* check if the wait_while_timer expired */ |
7bfc4753 BD |
863 | if (port->sm_mux_timer_counter |
864 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 865 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 | 866 | |
3bf2d28a VF |
867 | /* in order to withhold the selection logic to check |
868 | * all ports READY_N value every callback cycle to | |
869 | * update ready variable, we check READY_N and update | |
870 | * READY here | |
871 | */ | |
1da177e4 LT |
872 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
873 | ||
3bf2d28a VF |
874 | /* if the wait_while_timer expired, and the port is |
875 | * in READY state, move to ATTACHED state | |
876 | */ | |
7bfc4753 BD |
877 | if ((port->sm_vars & AD_PORT_READY) |
878 | && !port->sm_mux_timer_counter) | |
3bf2d28a | 879 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 LT |
880 | break; |
881 | case AD_MUX_ATTACHED: | |
3bf2d28a VF |
882 | /* check also if agg_select_timer expired (so the |
883 | * edable port will take place only after this timer) | |
884 | */ | |
885 | if ((port->sm_vars & AD_PORT_SELECTED) && | |
886 | (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && | |
887 | !__check_agg_selection_timer(port)) { | |
888 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING; | |
889 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || | |
890 | (port->sm_vars & AD_PORT_STANDBY)) { | |
891 | /* if UNSELECTED or STANDBY */ | |
1da177e4 | 892 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
893 | /* in order to withhold the selection logic to |
894 | * check all ports READY_N value every callback | |
895 | * cycle to update ready variable, we check | |
896 | * READY_N and update READY here | |
897 | */ | |
1da177e4 | 898 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 899 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
900 | } |
901 | break; | |
902 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
3bf2d28a VF |
903 | if (!(port->sm_vars & AD_PORT_SELECTED) || |
904 | (port->sm_vars & AD_PORT_STANDBY) || | |
905 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) { | |
906 | port->sm_mux_state = AD_MUX_ATTACHED; | |
1da177e4 | 907 | } else { |
3bf2d28a VF |
908 | /* if port state hasn't changed make |
909 | * sure that a collecting distributing | |
910 | * port in an active aggregator is enabled | |
911 | */ | |
1da177e4 LT |
912 | if (port->aggregator && |
913 | port->aggregator->is_active && | |
914 | !__port_is_enabled(port)) { | |
915 | ||
916 | __enable_port(port); | |
917 | } | |
918 | } | |
919 | break; | |
3bf2d28a | 920 | default: |
1da177e4 LT |
921 | break; |
922 | } | |
923 | } | |
924 | ||
3bf2d28a | 925 | /* check if the state machine was changed */ |
1da177e4 | 926 | if (port->sm_mux_state != last_state) { |
a4aee5c8 JP |
927 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
928 | port->actor_port_number, last_state, | |
929 | port->sm_mux_state); | |
1da177e4 LT |
930 | switch (port->sm_mux_state) { |
931 | case AD_MUX_DETACHED: | |
1da177e4 LT |
932 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
933 | ad_disable_collecting_distributing(port); | |
934 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
935 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 936 | port->ntt = true; |
1da177e4 LT |
937 | break; |
938 | case AD_MUX_WAITING: | |
939 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
940 | break; | |
941 | case AD_MUX_ATTACHED: | |
1da177e4 LT |
942 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; |
943 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
944 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
945 | ad_disable_collecting_distributing(port); | |
d238d458 | 946 | port->ntt = true; |
1da177e4 LT |
947 | break; |
948 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
949 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
950 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
951 | ad_enable_collecting_distributing(port); | |
d238d458 | 952 | port->ntt = true; |
1da177e4 | 953 | break; |
3bf2d28a | 954 | default: |
1da177e4 LT |
955 | break; |
956 | } | |
957 | } | |
958 | } | |
959 | ||
960 | /** | |
961 | * ad_rx_machine - handle a port's rx State Machine | |
962 | * @lacpdu: the lacpdu we've received | |
963 | * @port: the port we're looking at | |
964 | * | |
965 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
966 | * CURRENT. If timer expired set the state machine in the proper state. | |
967 | * In other cases, this function checks if we need to switch to other state. | |
968 | */ | |
969 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
970 | { | |
971 | rx_states_t last_state; | |
972 | ||
3bf2d28a VF |
973 | /* keep current State Machine state to compare later if it was |
974 | * changed | |
975 | */ | |
1da177e4 LT |
976 | last_state = port->sm_rx_state; |
977 | ||
3bf2d28a VF |
978 | /* check if state machine should change state */ |
979 | ||
980 | /* first, check if port was reinitialized */ | |
7bfc4753 | 981 | if (port->sm_vars & AD_PORT_BEGIN) |
7bfc4753 | 982 | port->sm_rx_state = AD_RX_INITIALIZE; |
3bf2d28a | 983 | /* check if port is not enabled */ |
7bfc4753 BD |
984 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
985 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
7bfc4753 | 986 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
3bf2d28a VF |
987 | /* check if new lacpdu arrived */ |
988 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || | |
989 | (port->sm_rx_state == AD_RX_DEFAULTED) || | |
990 | (port->sm_rx_state == AD_RX_CURRENT))) { | |
991 | port->sm_rx_timer_counter = 0; | |
1da177e4 LT |
992 | port->sm_rx_state = AD_RX_CURRENT; |
993 | } else { | |
3bf2d28a VF |
994 | /* if timer is on, and if it is expired */ |
995 | if (port->sm_rx_timer_counter && | |
996 | !(--port->sm_rx_timer_counter)) { | |
1da177e4 LT |
997 | switch (port->sm_rx_state) { |
998 | case AD_RX_EXPIRED: | |
3bf2d28a | 999 | port->sm_rx_state = AD_RX_DEFAULTED; |
1da177e4 LT |
1000 | break; |
1001 | case AD_RX_CURRENT: | |
3bf2d28a | 1002 | port->sm_rx_state = AD_RX_EXPIRED; |
1da177e4 | 1003 | break; |
3bf2d28a | 1004 | default: |
1da177e4 LT |
1005 | break; |
1006 | } | |
1007 | } else { | |
3bf2d28a | 1008 | /* if no lacpdu arrived and no timer is on */ |
1da177e4 LT |
1009 | switch (port->sm_rx_state) { |
1010 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 1011 | if (port->sm_vars & AD_PORT_MOVED) |
3bf2d28a | 1012 | port->sm_rx_state = AD_RX_INITIALIZE; |
7bfc4753 BD |
1013 | else if (port->is_enabled |
1014 | && (port->sm_vars | |
1015 | & AD_PORT_LACP_ENABLED)) | |
3bf2d28a | 1016 | port->sm_rx_state = AD_RX_EXPIRED; |
7bfc4753 BD |
1017 | else if (port->is_enabled |
1018 | && ((port->sm_vars | |
1019 | & AD_PORT_LACP_ENABLED) == 0)) | |
3bf2d28a | 1020 | port->sm_rx_state = AD_RX_LACP_DISABLED; |
1da177e4 | 1021 | break; |
3bf2d28a | 1022 | default: |
1da177e4 LT |
1023 | break; |
1024 | ||
1025 | } | |
1026 | } | |
1027 | } | |
1028 | ||
3bf2d28a | 1029 | /* check if the State machine was changed or new lacpdu arrived */ |
1da177e4 | 1030 | if ((port->sm_rx_state != last_state) || (lacpdu)) { |
a4aee5c8 JP |
1031 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1032 | port->actor_port_number, last_state, | |
1033 | port->sm_rx_state); | |
1da177e4 LT |
1034 | switch (port->sm_rx_state) { |
1035 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1036 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1037 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1038 | else |
1da177e4 | 1039 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1040 | port->sm_vars &= ~AD_PORT_SELECTED; |
1041 | __record_default(port); | |
1042 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1043 | port->sm_vars &= ~AD_PORT_MOVED; | |
3bf2d28a | 1044 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
1da177e4 | 1045 | |
3bf2d28a | 1046 | /* Fall Through */ |
1da177e4 LT |
1047 | case AD_RX_PORT_DISABLED: |
1048 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1049 | break; | |
1050 | case AD_RX_LACP_DISABLED: | |
1051 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1052 | __record_default(port); | |
1055c9ab | 1053 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1054 | port->sm_vars |= AD_PORT_MATCHED; |
1055 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1056 | break; | |
1057 | case AD_RX_EXPIRED: | |
3bf2d28a VF |
1058 | /* Reset of the Synchronization flag (Standard 43.4.12) |
1059 | * This reset cause to disable this port in the | |
1060 | * COLLECTING_DISTRIBUTING state of the mux machine in | |
1061 | * case of EXPIRED even if LINK_DOWN didn't arrive for | |
1062 | * the port. | |
1063 | */ | |
1055c9ab | 1064 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1065 | port->sm_vars &= ~AD_PORT_MATCHED; |
3bf2d28a | 1066 | port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; |
1da177e4 LT |
1067 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1068 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1069 | break; | |
1070 | case AD_RX_DEFAULTED: | |
1071 | __update_default_selected(port); | |
1072 | __record_default(port); | |
1073 | port->sm_vars |= AD_PORT_MATCHED; | |
1074 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1075 | break; | |
1076 | case AD_RX_CURRENT: | |
815117ad | 1077 | /* detect loopback situation */ |
3bf2d28a VF |
1078 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), |
1079 | &(port->actor_system))) { | |
d4471f5e | 1080 | netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" |
90194264 | 1081 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", |
3bf2d28a | 1082 | port->slave->dev->name); |
1da177e4 LT |
1083 | return; |
1084 | } | |
1085 | __update_selected(lacpdu, port); | |
1086 | __update_ntt(lacpdu, port); | |
1087 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1088 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1089 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 | 1090 | break; |
3bf2d28a | 1091 | default: |
1da177e4 LT |
1092 | break; |
1093 | } | |
1094 | } | |
1da177e4 LT |
1095 | } |
1096 | ||
1097 | /** | |
1098 | * ad_tx_machine - handle a port's tx state machine | |
1099 | * @port: the port we're looking at | |
1da177e4 LT |
1100 | */ |
1101 | static void ad_tx_machine(struct port *port) | |
1102 | { | |
3bf2d28a VF |
1103 | /* check if tx timer expired, to verify that we do not send more than |
1104 | * 3 packets per second | |
1105 | */ | |
1da177e4 | 1106 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { |
3bf2d28a | 1107 | /* check if there is something to send */ |
1da177e4 LT |
1108 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { |
1109 | __update_lacpdu_from_port(port); | |
d238d458 | 1110 | |
1da177e4 | 1111 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1112 | pr_debug("Sent LACPDU on port %d\n", |
1113 | port->actor_port_number); | |
d238d458 | 1114 | |
3bf2d28a VF |
1115 | /* mark ntt as false, so it will not be sent |
1116 | * again until demanded | |
1117 | */ | |
d238d458 | 1118 | port->ntt = false; |
1da177e4 LT |
1119 | } |
1120 | } | |
3bf2d28a VF |
1121 | /* restart tx timer(to verify that we will not exceed |
1122 | * AD_MAX_TX_IN_SECOND | |
1123 | */ | |
1124 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1125 | } |
1126 | } | |
1127 | ||
1128 | /** | |
1129 | * ad_periodic_machine - handle a port's periodic state machine | |
1130 | * @port: the port we're looking at | |
1131 | * | |
1132 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1133 | */ | |
1134 | static void ad_periodic_machine(struct port *port) | |
1135 | { | |
1136 | periodic_states_t last_state; | |
1137 | ||
3bf2d28a | 1138 | /* keep current state machine state to compare later if it was changed */ |
1da177e4 LT |
1139 | last_state = port->sm_periodic_state; |
1140 | ||
3bf2d28a | 1141 | /* check if port was reinitialized */ |
1da177e4 | 1142 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || |
1055c9ab | 1143 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 | 1144 | ) { |
3bf2d28a | 1145 | port->sm_periodic_state = AD_NO_PERIODIC; |
1da177e4 | 1146 | } |
3bf2d28a | 1147 | /* check if state machine should change state */ |
1da177e4 | 1148 | else if (port->sm_periodic_timer_counter) { |
3bf2d28a | 1149 | /* check if periodic state machine expired */ |
1da177e4 | 1150 | if (!(--port->sm_periodic_timer_counter)) { |
3bf2d28a VF |
1151 | /* if expired then do tx */ |
1152 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1da177e4 | 1153 | } else { |
3bf2d28a VF |
1154 | /* If not expired, check if there is some new timeout |
1155 | * parameter from the partner state | |
1156 | */ | |
1da177e4 LT |
1157 | switch (port->sm_periodic_state) { |
1158 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1159 | if (!(port->partner_oper.port_state |
1160 | & AD_STATE_LACP_TIMEOUT)) | |
3bf2d28a | 1161 | port->sm_periodic_state = AD_SLOW_PERIODIC; |
1da177e4 LT |
1162 | break; |
1163 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1164 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 | 1165 | port->sm_periodic_timer_counter = 0; |
3bf2d28a | 1166 | port->sm_periodic_state = AD_PERIODIC_TX; |
1da177e4 LT |
1167 | } |
1168 | break; | |
3bf2d28a | 1169 | default: |
1da177e4 LT |
1170 | break; |
1171 | } | |
1172 | } | |
1173 | } else { | |
1174 | switch (port->sm_periodic_state) { | |
1175 | case AD_NO_PERIODIC: | |
3bf2d28a | 1176 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 LT |
1177 | break; |
1178 | case AD_PERIODIC_TX: | |
3bf2d28a VF |
1179 | if (!(port->partner_oper.port_state & |
1180 | AD_STATE_LACP_TIMEOUT)) | |
1181 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
7bfc4753 | 1182 | else |
3bf2d28a | 1183 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 | 1184 | break; |
3bf2d28a | 1185 | default: |
1da177e4 LT |
1186 | break; |
1187 | } | |
1188 | } | |
1189 | ||
3bf2d28a | 1190 | /* check if the state machine was changed */ |
1da177e4 | 1191 | if (port->sm_periodic_state != last_state) { |
a4aee5c8 JP |
1192 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1193 | port->actor_port_number, last_state, | |
1194 | port->sm_periodic_state); | |
1da177e4 LT |
1195 | switch (port->sm_periodic_state) { |
1196 | case AD_NO_PERIODIC: | |
3bf2d28a | 1197 | port->sm_periodic_timer_counter = 0; |
1da177e4 LT |
1198 | break; |
1199 | case AD_FAST_PERIODIC: | |
3bf2d28a VF |
1200 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1201 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; | |
1da177e4 LT |
1202 | break; |
1203 | case AD_SLOW_PERIODIC: | |
3bf2d28a VF |
1204 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1205 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; | |
1da177e4 LT |
1206 | break; |
1207 | case AD_PERIODIC_TX: | |
d238d458 | 1208 | port->ntt = true; |
1da177e4 | 1209 | break; |
3bf2d28a | 1210 | default: |
1da177e4 LT |
1211 | break; |
1212 | } | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | /** | |
1217 | * ad_port_selection_logic - select aggregation groups | |
1218 | * @port: the port we're looking at | |
1219 | * | |
1220 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1221 | * selection logic is called in the inititalization (after all the handshkes), | |
1222 | * and after every lacpdu receive (if selected is off). | |
1223 | */ | |
1224 | static void ad_port_selection_logic(struct port *port) | |
1225 | { | |
1226 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1227 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1228 | struct list_head *iter; |
1229 | struct bonding *bond; | |
1230 | struct slave *slave; | |
1da177e4 LT |
1231 | int found = 0; |
1232 | ||
3bf2d28a | 1233 | /* if the port is already Selected, do nothing */ |
7bfc4753 | 1234 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1235 | return; |
1da177e4 | 1236 | |
3e36bb75 VF |
1237 | bond = __get_bond_by_port(port); |
1238 | ||
3bf2d28a | 1239 | /* if the port is connected to other aggregator, detach it */ |
1da177e4 | 1240 | if (port->aggregator) { |
3bf2d28a | 1241 | /* detach the port from its former aggregator */ |
128ea6c3 BD |
1242 | temp_aggregator = port->aggregator; |
1243 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1244 | last_port = curr_port, | |
3bf2d28a | 1245 | curr_port = curr_port->next_port_in_aggregator) { |
1da177e4 LT |
1246 | if (curr_port == port) { |
1247 | temp_aggregator->num_of_ports--; | |
3bf2d28a VF |
1248 | /* if it is the first port attached to the |
1249 | * aggregator | |
1250 | */ | |
1251 | if (!last_port) { | |
128ea6c3 BD |
1252 | temp_aggregator->lag_ports = |
1253 | port->next_port_in_aggregator; | |
3bf2d28a VF |
1254 | } else { |
1255 | /* not the first port attached to the | |
1256 | * aggregator | |
1257 | */ | |
128ea6c3 BD |
1258 | last_port->next_port_in_aggregator = |
1259 | port->next_port_in_aggregator; | |
1da177e4 LT |
1260 | } |
1261 | ||
3bf2d28a VF |
1262 | /* clear the port's relations to this |
1263 | * aggregator | |
1264 | */ | |
1da177e4 | 1265 | port->aggregator = NULL; |
128ea6c3 BD |
1266 | port->next_port_in_aggregator = NULL; |
1267 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1268 | |
d4471f5e VF |
1269 | netdev_dbg(bond->dev, "Port %d left LAG %d\n", |
1270 | port->actor_port_number, | |
1271 | temp_aggregator->aggregator_identifier); | |
3bf2d28a VF |
1272 | /* if the aggregator is empty, clear its |
1273 | * parameters, and set it ready to be attached | |
1274 | */ | |
7bfc4753 | 1275 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1276 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1277 | break; |
1278 | } | |
1279 | } | |
3bf2d28a VF |
1280 | if (!curr_port) { |
1281 | /* meaning: the port was related to an aggregator | |
1282 | * but was not on the aggregator port list | |
1283 | */ | |
d4471f5e VF |
1284 | net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
1285 | port->slave->bond->dev->name, | |
1286 | port->actor_port_number, | |
1287 | port->slave->dev->name, | |
1288 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1289 | } |
1290 | } | |
3bf2d28a | 1291 | /* search on all aggregators for a suitable aggregator for this port */ |
3e36bb75 | 1292 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 1293 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 | 1294 | |
3bf2d28a | 1295 | /* keep a free aggregator for later use(if needed) */ |
1da177e4 | 1296 | if (!aggregator->lag_ports) { |
7bfc4753 | 1297 | if (!free_aggregator) |
128ea6c3 | 1298 | free_aggregator = aggregator; |
1da177e4 LT |
1299 | continue; |
1300 | } | |
815117ad | 1301 | /* check if current aggregator suits us */ |
1302 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1303 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1055c9ab HE |
1304 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
1305 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1306 | ) && |
815117ad | 1307 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
1308 | !aggregator->is_individual) /* but is not individual OR */ | |
1da177e4 LT |
1309 | ) |
1310 | ) { | |
815117ad | 1311 | /* attach to the founded aggregator */ |
1da177e4 | 1312 | port->aggregator = aggregator; |
128ea6c3 BD |
1313 | port->actor_port_aggregator_identifier = |
1314 | port->aggregator->aggregator_identifier; | |
1315 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1316 | port->aggregator->num_of_ports++; |
128ea6c3 | 1317 | aggregator->lag_ports = port; |
d4471f5e VF |
1318 | netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", |
1319 | port->actor_port_number, | |
1320 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1321 | |
3bf2d28a | 1322 | /* mark this port as selected */ |
1da177e4 LT |
1323 | port->sm_vars |= AD_PORT_SELECTED; |
1324 | found = 1; | |
1325 | break; | |
1326 | } | |
1327 | } | |
1328 | ||
3bf2d28a VF |
1329 | /* the port couldn't find an aggregator - attach it to a new |
1330 | * aggregator | |
1331 | */ | |
1da177e4 LT |
1332 | if (!found) { |
1333 | if (free_aggregator) { | |
3bf2d28a | 1334 | /* assign port a new aggregator */ |
1da177e4 | 1335 | port->aggregator = free_aggregator; |
128ea6c3 BD |
1336 | port->actor_port_aggregator_identifier = |
1337 | port->aggregator->aggregator_identifier; | |
1da177e4 | 1338 | |
3bf2d28a VF |
1339 | /* update the new aggregator's parameters |
1340 | * if port was responsed from the end-user | |
1341 | */ | |
7bfc4753 BD |
1342 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1343 | /* if port is full duplex */ | |
1624db7b | 1344 | port->aggregator->is_individual = false; |
7bfc4753 | 1345 | else |
1624db7b | 1346 | port->aggregator->is_individual = true; |
1da177e4 LT |
1347 | |
1348 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1349 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1350 | port->aggregator->partner_system = |
1351 | port->partner_oper.system; | |
1352 | port->aggregator->partner_system_priority = | |
1353 | port->partner_oper.system_priority; | |
1055c9ab | 1354 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1355 | port->aggregator->receive_state = 1; |
1356 | port->aggregator->transmit_state = 1; | |
1357 | port->aggregator->lag_ports = port; | |
1358 | port->aggregator->num_of_ports++; | |
1359 | ||
3bf2d28a | 1360 | /* mark this port as selected */ |
1da177e4 LT |
1361 | port->sm_vars |= AD_PORT_SELECTED; |
1362 | ||
d4471f5e VF |
1363 | netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", |
1364 | port->actor_port_number, | |
1365 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1366 | } else { |
d4471f5e | 1367 | netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", |
1da177e4 LT |
1368 | port->actor_port_number, port->slave->dev->name); |
1369 | } | |
1370 | } | |
3bf2d28a VF |
1371 | /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE |
1372 | * in all aggregator's ports, else set ready=FALSE in all | |
1373 | * aggregator's ports | |
1374 | */ | |
1375 | __set_agg_ports_ready(port->aggregator, | |
1376 | __agg_ports_are_ready(port->aggregator)); | |
1da177e4 | 1377 | |
fd989c83 JV |
1378 | aggregator = __get_first_agg(port); |
1379 | ad_agg_selection_logic(aggregator); | |
1380 | } | |
1381 | ||
3bf2d28a | 1382 | /* Decide if "agg" is a better choice for the new active aggregator that |
fd989c83 JV |
1383 | * the current best, according to the ad_select policy. |
1384 | */ | |
1385 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1386 | struct aggregator *curr) | |
1387 | { | |
3bf2d28a | 1388 | /* 0. If no best, select current. |
fd989c83 JV |
1389 | * |
1390 | * 1. If the current agg is not individual, and the best is | |
1391 | * individual, select current. | |
1392 | * | |
1393 | * 2. If current agg is individual and the best is not, keep best. | |
1394 | * | |
1395 | * 3. Therefore, current and best are both individual or both not | |
1396 | * individual, so: | |
1397 | * | |
1398 | * 3a. If current agg partner replied, and best agg partner did not, | |
1399 | * select current. | |
1400 | * | |
1401 | * 3b. If current agg partner did not reply and best agg partner | |
1402 | * did reply, keep best. | |
1403 | * | |
1404 | * 4. Therefore, current and best both have partner replies or | |
1405 | * both do not, so perform selection policy: | |
1406 | * | |
1407 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1408 | * select by bandwidth. | |
1409 | * | |
1410 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1411 | */ | |
1412 | if (!best) | |
1413 | return curr; | |
1414 | ||
1415 | if (!curr->is_individual && best->is_individual) | |
1416 | return curr; | |
1417 | ||
1418 | if (curr->is_individual && !best->is_individual) | |
1419 | return best; | |
1420 | ||
1421 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1422 | return curr; | |
1423 | ||
1424 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1425 | return best; | |
1426 | ||
1427 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1428 | case BOND_AD_COUNT: | |
1429 | if (curr->num_of_ports > best->num_of_ports) | |
1430 | return curr; | |
1431 | ||
1432 | if (curr->num_of_ports < best->num_of_ports) | |
1433 | return best; | |
1434 | ||
1435 | /*FALLTHROUGH*/ | |
1436 | case BOND_AD_STABLE: | |
1437 | case BOND_AD_BANDWIDTH: | |
1438 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1439 | return curr; | |
1440 | ||
1441 | break; | |
1442 | ||
1443 | default: | |
d4471f5e VF |
1444 | net_warn_ratelimited("%s: Impossible agg select mode %d\n", |
1445 | curr->slave->bond->dev->name, | |
1446 | __get_agg_selection_mode(curr->lag_ports)); | |
fd989c83 | 1447 | break; |
1da177e4 | 1448 | } |
fd989c83 JV |
1449 | |
1450 | return best; | |
1da177e4 LT |
1451 | } |
1452 | ||
4cd6fe1c SH |
1453 | static int agg_device_up(const struct aggregator *agg) |
1454 | { | |
2430af8b | 1455 | struct port *port = agg->lag_ports; |
3bf2d28a | 1456 | |
2430af8b JB |
1457 | if (!port) |
1458 | return 0; | |
3bf2d28a VF |
1459 | |
1460 | return netif_running(port->slave->dev) && | |
1461 | netif_carrier_ok(port->slave->dev); | |
4cd6fe1c SH |
1462 | } |
1463 | ||
1da177e4 LT |
1464 | /** |
1465 | * ad_agg_selection_logic - select an aggregation group for a team | |
1466 | * @aggregator: the aggregator we're looking at | |
1467 | * | |
1468 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1469 | * |
1470 | * The logic of this function is to select the aggregator according to | |
1471 | * the ad_select policy: | |
1472 | * | |
1473 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1474 | * it, and to reselect the active aggregator only if the previous | |
1475 | * aggregator has no more ports related to it. | |
1476 | * | |
1477 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1478 | * bandwidth, and reselect whenever a link state change takes place or the | |
1479 | * set of slaves in the bond changes. | |
1480 | * | |
1481 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1482 | * (slaves), and reselect whenever a link state change takes place or the | |
1483 | * set of slaves in the bond changes. | |
1da177e4 LT |
1484 | * |
1485 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1486 | * __get_active_agg() won't work correctly. This function should be better | |
1487 | * called with the bond itself, and retrieve the first agg from it. | |
1488 | */ | |
fd989c83 | 1489 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1490 | { |
fd989c83 | 1491 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1492 | struct bonding *bond = agg->slave->bond; |
1493 | struct list_head *iter; | |
1494 | struct slave *slave; | |
1da177e4 | 1495 | struct port *port; |
1da177e4 | 1496 | |
49b7624e | 1497 | rcu_read_lock(); |
fd989c83 | 1498 | origin = agg; |
fd989c83 | 1499 | active = __get_active_agg(agg); |
4cd6fe1c | 1500 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1501 | |
be79bd04 | 1502 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1503 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
bef1fcce | 1504 | |
fd989c83 JV |
1505 | agg->is_active = 0; |
1506 | ||
4cd6fe1c | 1507 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1508 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1509 | } |
fd989c83 JV |
1510 | |
1511 | if (best && | |
1512 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
3bf2d28a | 1513 | /* For the STABLE policy, don't replace the old active |
fd989c83 JV |
1514 | * aggregator if it's still active (it has an answering |
1515 | * partner) or if both the best and active don't have an | |
1516 | * answering partner. | |
1517 | */ | |
1518 | if (active && active->lag_ports && | |
1519 | active->lag_ports->is_enabled && | |
1520 | (__agg_has_partner(active) || | |
3bf2d28a VF |
1521 | (!__agg_has_partner(active) && |
1522 | !__agg_has_partner(best)))) { | |
fd989c83 JV |
1523 | if (!(!active->actor_oper_aggregator_key && |
1524 | best->actor_oper_aggregator_key)) { | |
1525 | best = NULL; | |
1526 | active->is_active = 1; | |
1da177e4 LT |
1527 | } |
1528 | } | |
fd989c83 | 1529 | } |
1da177e4 | 1530 | |
fd989c83 JV |
1531 | if (best && (best == active)) { |
1532 | best = NULL; | |
1533 | active->is_active = 1; | |
1da177e4 LT |
1534 | } |
1535 | ||
be79bd04 | 1536 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1537 | if (best) { |
d4471f5e VF |
1538 | netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1539 | best->aggregator_identifier, best->num_of_ports, | |
1540 | best->actor_oper_aggregator_key, | |
1541 | best->partner_oper_aggregator_key, | |
1542 | best->is_individual, best->is_active); | |
1543 | netdev_dbg(bond->dev, "best ports %p slave %p %s\n", | |
1544 | best->lag_ports, best->slave, | |
1545 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1546 | |
be79bd04 | 1547 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1548 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
fd989c83 | 1549 | |
d4471f5e VF |
1550 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1551 | agg->aggregator_identifier, agg->num_of_ports, | |
1552 | agg->actor_oper_aggregator_key, | |
1553 | agg->partner_oper_aggregator_key, | |
1554 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1555 | } |
1556 | ||
be79bd04 | 1557 | /* check if any partner replys */ |
fd989c83 | 1558 | if (best->is_individual) { |
d4471f5e VF |
1559 | net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
1560 | best->slave ? | |
1561 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1562 | } |
1563 | ||
fd989c83 | 1564 | best->is_active = 1; |
d4471f5e VF |
1565 | netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", |
1566 | best->aggregator_identifier); | |
1567 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1568 | best->aggregator_identifier, best->num_of_ports, | |
1569 | best->actor_oper_aggregator_key, | |
1570 | best->partner_oper_aggregator_key, | |
1571 | best->is_individual, best->is_active); | |
1da177e4 | 1572 | |
3bf2d28a VF |
1573 | /* disable the ports that were related to the former |
1574 | * active_aggregator | |
1575 | */ | |
fd989c83 JV |
1576 | if (active) { |
1577 | for (port = active->lag_ports; port; | |
1578 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1579 | __disable_port(port); |
1580 | } | |
1581 | } | |
1582 | } | |
1583 | ||
3bf2d28a | 1584 | /* if the selected aggregator is of join individuals |
fd989c83 JV |
1585 | * (partner_system is NULL), enable their ports |
1586 | */ | |
1587 | active = __get_active_agg(origin); | |
1da177e4 | 1588 | |
fd989c83 JV |
1589 | if (active) { |
1590 | if (!__agg_has_partner(active)) { | |
1591 | for (port = active->lag_ports; port; | |
1592 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1593 | __enable_port(port); |
1594 | } | |
1595 | } | |
1596 | } | |
fd989c83 | 1597 | |
be79bd04 | 1598 | rcu_read_unlock(); |
1599 | ||
bef1fcce | 1600 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1601 | } |
1602 | ||
1603 | /** | |
1604 | * ad_clear_agg - clear a given aggregator's parameters | |
1605 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1606 | */ |
1607 | static void ad_clear_agg(struct aggregator *aggregator) | |
1608 | { | |
1609 | if (aggregator) { | |
1624db7b | 1610 | aggregator->is_individual = false; |
1da177e4 LT |
1611 | aggregator->actor_admin_aggregator_key = 0; |
1612 | aggregator->actor_oper_aggregator_key = 0; | |
1613 | aggregator->partner_system = null_mac_addr; | |
1614 | aggregator->partner_system_priority = 0; | |
1615 | aggregator->partner_oper_aggregator_key = 0; | |
1616 | aggregator->receive_state = 0; | |
1617 | aggregator->transmit_state = 0; | |
1618 | aggregator->lag_ports = NULL; | |
1619 | aggregator->is_active = 0; | |
1620 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1621 | pr_debug("LAG %d was cleared\n", |
1622 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1623 | } |
1624 | } | |
1625 | ||
1626 | /** | |
1627 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1628 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1629 | */ |
1630 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1631 | { | |
1632 | if (aggregator) { | |
1633 | ad_clear_agg(aggregator); | |
1634 | ||
1635 | aggregator->aggregator_mac_address = null_mac_addr; | |
1636 | aggregator->aggregator_identifier = 0; | |
1637 | aggregator->slave = NULL; | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | /** | |
1642 | * ad_initialize_port - initialize a given port's parameters | |
1643 | * @aggregator: the aggregator we're looking at | |
1644 | * @lacp_fast: boolean. whether fast periodic should be used | |
1da177e4 LT |
1645 | */ |
1646 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1647 | { | |
c7e703d0 HE |
1648 | static const struct port_params tmpl = { |
1649 | .system_priority = 0xffff, | |
1650 | .key = 1, | |
1651 | .port_number = 1, | |
1652 | .port_priority = 0xff, | |
1653 | .port_state = 1, | |
1654 | }; | |
7addeef6 HE |
1655 | static const struct lacpdu lacpdu = { |
1656 | .subtype = 0x01, | |
1657 | .version_number = 0x01, | |
1658 | .tlv_type_actor_info = 0x01, | |
1659 | .actor_information_length = 0x14, | |
1660 | .tlv_type_partner_info = 0x02, | |
1661 | .partner_information_length = 0x14, | |
1662 | .tlv_type_collector_info = 0x03, | |
1663 | .collector_information_length = 0x10, | |
1664 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1665 | }; | |
c7e703d0 | 1666 | |
1da177e4 LT |
1667 | if (port) { |
1668 | port->actor_port_number = 1; | |
1669 | port->actor_port_priority = 0xff; | |
1670 | port->actor_system = null_mac_addr; | |
1671 | port->actor_system_priority = 0xffff; | |
1672 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1673 | port->ntt = false; |
1da177e4 LT |
1674 | port->actor_admin_port_key = 1; |
1675 | port->actor_oper_port_key = 1; | |
3bf2d28a VF |
1676 | port->actor_admin_port_state = AD_STATE_AGGREGATION | |
1677 | AD_STATE_LACP_ACTIVITY; | |
1678 | port->actor_oper_port_state = AD_STATE_AGGREGATION | | |
1679 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 | 1680 | |
7bfc4753 | 1681 | if (lacp_fast) |
1da177e4 | 1682 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1683 | |
c7e703d0 HE |
1684 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1685 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1686 | ||
f48127b6 | 1687 | port->is_enabled = true; |
3bf2d28a | 1688 | /* private parameters */ |
1da177e4 LT |
1689 | port->sm_vars = 0x3; |
1690 | port->sm_rx_state = 0; | |
1691 | port->sm_rx_timer_counter = 0; | |
1692 | port->sm_periodic_state = 0; | |
1693 | port->sm_periodic_timer_counter = 0; | |
1694 | port->sm_mux_state = 0; | |
1695 | port->sm_mux_timer_counter = 0; | |
1696 | port->sm_tx_state = 0; | |
1697 | port->sm_tx_timer_counter = 0; | |
1698 | port->slave = NULL; | |
1699 | port->aggregator = NULL; | |
1700 | port->next_port_in_aggregator = NULL; | |
1701 | port->transaction_id = 0; | |
1702 | ||
7addeef6 | 1703 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1704 | } |
1705 | } | |
1706 | ||
1707 | /** | |
1708 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1709 | * @port: the port we're looking at | |
1710 | * | |
1711 | * Enable @port if it's in an active aggregator | |
1712 | */ | |
1713 | static void ad_enable_collecting_distributing(struct port *port) | |
1714 | { | |
1715 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1716 | pr_debug("Enabling port %d(LAG %d)\n", |
1717 | port->actor_port_number, | |
1718 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1719 | __enable_port(port); |
1720 | } | |
1721 | } | |
1722 | ||
1723 | /** | |
1724 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1725 | * @port: the port we're looking at | |
1da177e4 LT |
1726 | */ |
1727 | static void ad_disable_collecting_distributing(struct port *port) | |
1728 | { | |
3bf2d28a VF |
1729 | if (port->aggregator && |
1730 | !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), | |
1731 | &(null_mac_addr))) { | |
a4aee5c8 JP |
1732 | pr_debug("Disabling port %d(LAG %d)\n", |
1733 | port->actor_port_number, | |
1734 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1735 | __disable_port(port); |
1736 | } | |
1737 | } | |
1738 | ||
1da177e4 LT |
1739 | /** |
1740 | * ad_marker_info_received - handle receive of a Marker information frame | |
1741 | * @marker_info: Marker info received | |
1742 | * @port: the port we're looking at | |
1da177e4 | 1743 | */ |
1c3f0b8e MD |
1744 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1745 | struct port *port) | |
1da177e4 | 1746 | { |
1c3f0b8e | 1747 | struct bond_marker marker; |
1da177e4 | 1748 | |
3bf2d28a | 1749 | /* copy the received marker data to the response marker */ |
1c3f0b8e | 1750 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
3bf2d28a | 1751 | /* change the marker subtype to marker response */ |
128ea6c3 | 1752 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 | 1753 | |
3bf2d28a | 1754 | /* send the marker response */ |
1da177e4 | 1755 | if (ad_marker_send(port, &marker) >= 0) { |
a4aee5c8 JP |
1756 | pr_debug("Sent Marker Response on port %d\n", |
1757 | port->actor_port_number); | |
1da177e4 LT |
1758 | } |
1759 | } | |
1760 | ||
1761 | /** | |
1762 | * ad_marker_response_received - handle receive of a marker response frame | |
1763 | * @marker: marker PDU received | |
1764 | * @port: the port we're looking at | |
1765 | * | |
1766 | * This function does nothing since we decided not to implement send and handle | |
1767 | * response for marker PDU's, in this stage, but only to respond to marker | |
1768 | * information. | |
1769 | */ | |
1c3f0b8e | 1770 | static void ad_marker_response_received(struct bond_marker *marker, |
3bf2d28a | 1771 | struct port *port) |
1da177e4 | 1772 | { |
3bf2d28a VF |
1773 | marker = NULL; |
1774 | port = NULL; | |
1775 | /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ | |
1da177e4 LT |
1776 | } |
1777 | ||
3bf2d28a | 1778 | /* ========= AD exported functions to the main bonding code ========= */ |
1da177e4 | 1779 | |
3bf2d28a | 1780 | /* Check aggregators status in team every T seconds */ |
1da177e4 LT |
1781 | #define AD_AGGREGATOR_SELECTION_TIMER 8 |
1782 | ||
3bf2d28a VF |
1783 | /** |
1784 | * bond_3ad_initiate_agg_selection - initate aggregator selection | |
1785 | * @bond: bonding struct | |
fd989c83 JV |
1786 | * |
1787 | * Set the aggregation selection timer, to initiate an agg selection in | |
1788 | * the very near future. Called during first initialization, and during | |
1789 | * any down to up transitions of the bond. | |
1790 | */ | |
1791 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1792 | { | |
1793 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1794 | } |
1795 | ||
1da177e4 LT |
1796 | /** |
1797 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1798 | * @bond: bonding struct to work on | |
1799 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1800 | * |
1801 | * Can be called only after the mac address of the bond is set. | |
1802 | */ | |
56d00c67 | 1803 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1804 | { |
815117ad | 1805 | /* check that the bond is not initialized yet */ |
1806 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
3a6d54c5 | 1807 | bond->dev->dev_addr)) { |
1da177e4 | 1808 | |
163c8ff3 | 1809 | BOND_AD_INFO(bond).aggregator_identifier = 0; |
1da177e4 | 1810 | |
1da177e4 LT |
1811 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1812 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1813 | ||
3bf2d28a VF |
1814 | /* initialize how many times this module is called in one |
1815 | * second (should be about every 100ms) | |
1816 | */ | |
1da177e4 LT |
1817 | ad_ticks_per_sec = tick_resolution; |
1818 | ||
fd989c83 JV |
1819 | bond_3ad_initiate_agg_selection(bond, |
1820 | AD_AGGREGATOR_SELECTION_TIMER * | |
1821 | ad_ticks_per_sec); | |
1da177e4 LT |
1822 | } |
1823 | } | |
1824 | ||
1825 | /** | |
1826 | * bond_3ad_bind_slave - initialize a slave's port | |
1827 | * @slave: slave struct to work on | |
1828 | * | |
1829 | * Returns: 0 on success | |
1830 | * < 0 on error | |
1831 | */ | |
359632e5 | 1832 | void bond_3ad_bind_slave(struct slave *slave) |
1da177e4 LT |
1833 | { |
1834 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1835 | struct port *port; | |
1836 | struct aggregator *aggregator; | |
1837 | ||
359632e5 | 1838 | /* check that the slave has not been initialized yet. */ |
3fdddd85 | 1839 | if (SLAVE_AD_INFO(slave)->port.slave != slave) { |
1da177e4 | 1840 | |
359632e5 | 1841 | /* port initialization */ |
3fdddd85 | 1842 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 1843 | |
bf0239a9 | 1844 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 | 1845 | |
e0809dbc | 1846 | __initialize_port_locks(slave); |
1da177e4 | 1847 | port->slave = slave; |
3fdddd85 | 1848 | port->actor_port_number = SLAVE_AD_INFO(slave)->id; |
359632e5 | 1849 | /* key is determined according to the link speed, duplex and user key(which |
1850 | * is yet not supported) | |
359632e5 | 1851 | */ |
3bf2d28a | 1852 | port->actor_admin_port_key = 0; |
1da177e4 LT |
1853 | port->actor_admin_port_key |= __get_duplex(port); |
1854 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1855 | port->actor_oper_port_key = port->actor_admin_port_key; | |
3bf2d28a VF |
1856 | /* if the port is not full duplex, then the port should be not |
1857 | * lacp Enabled | |
1858 | */ | |
7bfc4753 | 1859 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1860 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
359632e5 | 1861 | /* actor system is the bond's system */ |
1da177e4 | 1862 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; |
3bf2d28a VF |
1863 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND |
1864 | * lacpdu's are sent in one second) | |
1865 | */ | |
1da177e4 LT |
1866 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
1867 | port->aggregator = NULL; | |
1868 | port->next_port_in_aggregator = NULL; | |
1869 | ||
1870 | __disable_port(port); | |
1da177e4 | 1871 | |
359632e5 | 1872 | /* aggregator initialization */ |
3fdddd85 | 1873 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 LT |
1874 | |
1875 | ad_initialize_agg(aggregator); | |
1876 | ||
1877 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
163c8ff3 | 1878 | aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; |
1da177e4 LT |
1879 | aggregator->slave = slave; |
1880 | aggregator->is_active = 0; | |
1881 | aggregator->num_of_ports = 0; | |
1882 | } | |
1da177e4 LT |
1883 | } |
1884 | ||
1885 | /** | |
1886 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1887 | * @slave: slave struct to work on | |
1888 | * | |
1889 | * Search for the aggregator that is related to this port, remove the | |
1890 | * aggregator and assign another aggregator for other port related to it | |
1891 | * (if any), and remove the port. | |
1892 | */ | |
1893 | void bond_3ad_unbind_slave(struct slave *slave) | |
1894 | { | |
1895 | struct port *port, *prev_port, *temp_port; | |
1896 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1897 | int select_new_active_agg = 0; | |
0b088264 VF |
1898 | struct bonding *bond = slave->bond; |
1899 | struct slave *slave_iter; | |
1900 | struct list_head *iter; | |
a361c83c | 1901 | |
3fdddd85 | 1902 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1903 | port = &(SLAVE_AD_INFO(slave)->port); | |
1da177e4 | 1904 | |
3bf2d28a | 1905 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 1906 | if (!port->slave) { |
d4471f5e VF |
1907 | netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", |
1908 | slave->dev->name); | |
1da177e4 LT |
1909 | return; |
1910 | } | |
1911 | ||
d4471f5e VF |
1912 | netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", |
1913 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1914 | |
1915 | /* Tell the partner that this port is not suitable for aggregation */ | |
1916 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1917 | __update_lacpdu_from_port(port); | |
1918 | ad_lacpdu_send(port); | |
1919 | ||
3bf2d28a | 1920 | /* check if this aggregator is occupied */ |
1da177e4 | 1921 | if (aggregator->lag_ports) { |
3bf2d28a VF |
1922 | /* check if there are other ports related to this aggregator |
1923 | * except the port related to this slave(thats ensure us that | |
1924 | * there is a reason to search for new aggregator, and that we | |
1925 | * will find one | |
1926 | */ | |
1927 | if ((aggregator->lag_ports != port) || | |
1928 | (aggregator->lag_ports->next_port_in_aggregator)) { | |
1929 | /* find new aggregator for the related port(s) */ | |
0b088264 | 1930 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 1931 | new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
3bf2d28a VF |
1932 | /* if the new aggregator is empty, or it is |
1933 | * connected to our port only | |
1934 | */ | |
1935 | if (!new_aggregator->lag_ports || | |
1936 | ((new_aggregator->lag_ports == port) && | |
1937 | !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 1938 | break; |
1da177e4 | 1939 | } |
0b088264 VF |
1940 | if (!slave_iter) |
1941 | new_aggregator = NULL; | |
3bf2d28a VF |
1942 | |
1943 | /* if new aggregator found, copy the aggregator's | |
1944 | * parameters and connect the related lag_ports to the | |
1945 | * new aggregator | |
1946 | */ | |
1da177e4 | 1947 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { |
d4471f5e VF |
1948 | netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", |
1949 | aggregator->aggregator_identifier, | |
1950 | new_aggregator->aggregator_identifier); | |
1da177e4 | 1951 | |
3bf2d28a VF |
1952 | if ((new_aggregator->lag_ports == port) && |
1953 | new_aggregator->is_active) { | |
d4471f5e | 1954 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
1da177e4 LT |
1955 | select_new_active_agg = 1; |
1956 | } | |
1957 | ||
1958 | new_aggregator->is_individual = aggregator->is_individual; | |
1959 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
1960 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
1961 | new_aggregator->partner_system = aggregator->partner_system; | |
1962 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
1963 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
1964 | new_aggregator->receive_state = aggregator->receive_state; | |
1965 | new_aggregator->transmit_state = aggregator->transmit_state; | |
1966 | new_aggregator->lag_ports = aggregator->lag_ports; | |
1967 | new_aggregator->is_active = aggregator->is_active; | |
1968 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
1969 | ||
3bf2d28a VF |
1970 | /* update the information that is written on |
1971 | * the ports about the aggregator | |
1972 | */ | |
128ea6c3 BD |
1973 | for (temp_port = aggregator->lag_ports; temp_port; |
1974 | temp_port = temp_port->next_port_in_aggregator) { | |
1975 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
1976 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
1977 | } | |
1978 | ||
1da177e4 | 1979 | ad_clear_agg(aggregator); |
a361c83c | 1980 | |
7bfc4753 | 1981 | if (select_new_active_agg) |
1da177e4 | 1982 | ad_agg_selection_logic(__get_first_agg(port)); |
1da177e4 | 1983 | } else { |
d4471f5e | 1984 | netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); |
1da177e4 | 1985 | } |
3bf2d28a VF |
1986 | } else { |
1987 | /* in case that the only port related to this | |
1988 | * aggregator is the one we want to remove | |
1989 | */ | |
1da177e4 | 1990 | select_new_active_agg = aggregator->is_active; |
1da177e4 LT |
1991 | ad_clear_agg(aggregator); |
1992 | if (select_new_active_agg) { | |
d4471f5e | 1993 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 1994 | /* select new active aggregator */ |
74684493 VF |
1995 | temp_aggregator = __get_first_agg(port); |
1996 | if (temp_aggregator) | |
1997 | ad_agg_selection_logic(temp_aggregator); | |
1da177e4 LT |
1998 | } |
1999 | } | |
2000 | } | |
2001 | ||
d4471f5e | 2002 | netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); |
3bf2d28a VF |
2003 | |
2004 | /* find the aggregator that this port is connected to */ | |
0b088264 | 2005 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 2006 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
1da177e4 | 2007 | prev_port = NULL; |
3bf2d28a | 2008 | /* search the port in the aggregator's related ports */ |
128ea6c3 BD |
2009 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2010 | prev_port = temp_port, | |
3bf2d28a VF |
2011 | temp_port = temp_port->next_port_in_aggregator) { |
2012 | if (temp_port == port) { | |
2013 | /* the aggregator found - detach the port from | |
2014 | * this aggregator | |
2015 | */ | |
7bfc4753 | 2016 | if (prev_port) |
1da177e4 | 2017 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2018 | else |
1da177e4 | 2019 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2020 | temp_aggregator->num_of_ports--; |
128ea6c3 | 2021 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 | 2022 | select_new_active_agg = temp_aggregator->is_active; |
1da177e4 LT |
2023 | ad_clear_agg(temp_aggregator); |
2024 | if (select_new_active_agg) { | |
d4471f5e | 2025 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 2026 | /* select new active aggregator */ |
1da177e4 LT |
2027 | ad_agg_selection_logic(__get_first_agg(port)); |
2028 | } | |
2029 | } | |
2030 | break; | |
2031 | } | |
2032 | } | |
2033 | } | |
128ea6c3 | 2034 | port->slave = NULL; |
1da177e4 LT |
2035 | } |
2036 | ||
2037 | /** | |
2038 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2039 | * @bond: bonding struct to work on | |
2040 | * | |
2041 | * The state machine handling concept in this module is to check every tick | |
2042 | * which state machine should operate any function. The execution order is | |
2043 | * round robin, so when we have an interaction between state machines, the | |
2044 | * reply of one to each other might be delayed until next tick. | |
2045 | * | |
2046 | * This function also complete the initialization when the agg_select_timer | |
2047 | * times out, and it selects an aggregator for the ports that are yet not | |
2048 | * related to any aggregator, and selects the active aggregator for a bond. | |
2049 | */ | |
1b76b316 | 2050 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2051 | { |
1b76b316 JV |
2052 | struct bonding *bond = container_of(work, struct bonding, |
2053 | ad_work.work); | |
1da177e4 | 2054 | struct aggregator *aggregator; |
3c4c88a1 VF |
2055 | struct list_head *iter; |
2056 | struct slave *slave; | |
2057 | struct port *port; | |
5e5b0665 | 2058 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
1da177e4 | 2059 | |
b7435628 | 2060 | spin_lock_bh(&bond->mode_lock); |
be79bd04 | 2061 | rcu_read_lock(); |
1f2cd845 | 2062 | |
be79bd04 | 2063 | /* check if there are any slaves */ |
0965a1f3 | 2064 | if (!bond_has_slaves(bond)) |
1da177e4 | 2065 | goto re_arm; |
1da177e4 | 2066 | |
be79bd04 | 2067 | /* check if agg_select_timer timer after initialize is timed out */ |
3bf2d28a VF |
2068 | if (BOND_AD_INFO(bond).agg_select_timer && |
2069 | !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
be79bd04 | 2070 | slave = bond_first_slave_rcu(bond); |
3fdddd85 | 2071 | port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; |
fe9323da | 2072 | |
be79bd04 | 2073 | /* select the active aggregator for the bond */ |
fe9323da | 2074 | if (port) { |
1da177e4 | 2075 | if (!port->slave) { |
d4471f5e VF |
2076 | net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", |
2077 | bond->dev->name); | |
1da177e4 LT |
2078 | goto re_arm; |
2079 | } | |
2080 | ||
2081 | aggregator = __get_first_agg(port); | |
2082 | ad_agg_selection_logic(aggregator); | |
2083 | } | |
f0c76d61 | 2084 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2085 | } |
2086 | ||
be79bd04 | 2087 | /* for each port run the state machines */ |
2088 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3fdddd85 | 2089 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2090 | if (!port->slave) { |
d4471f5e | 2091 | net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", |
86a2b9cf | 2092 | bond->dev->name); |
1da177e4 LT |
2093 | goto re_arm; |
2094 | } | |
2095 | ||
16d79d7d NC |
2096 | /* Lock around state machines to protect data accessed |
2097 | * by all (e.g., port->sm_vars). ad_rx_machine may run | |
2098 | * concurrently due to incoming LACPDU. | |
2099 | */ | |
9ac3524a | 2100 | __get_state_machine_lock(port); |
16d79d7d | 2101 | |
1da177e4 LT |
2102 | ad_rx_machine(NULL, port); |
2103 | ad_periodic_machine(port); | |
2104 | ad_port_selection_logic(port); | |
2105 | ad_mux_machine(port); | |
2106 | ad_tx_machine(port); | |
2107 | ||
be79bd04 | 2108 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2109 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2110 | port->sm_vars &= ~AD_PORT_BEGIN; |
16d79d7d | 2111 | |
9ac3524a | 2112 | __release_state_machine_lock(port); |
1da177e4 LT |
2113 | } |
2114 | ||
2115 | re_arm: | |
5e5b0665 | 2116 | bond_for_each_slave_rcu(bond, slave, iter) { |
2117 | if (slave->should_notify) { | |
2118 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2119 | break; | |
2120 | } | |
2121 | } | |
be79bd04 | 2122 | rcu_read_unlock(); |
b7435628 | 2123 | spin_unlock_bh(&bond->mode_lock); |
5e5b0665 | 2124 | |
2125 | if (should_notify_rtnl && rtnl_trylock()) { | |
b0929915 | 2126 | bond_slave_state_notify(bond); |
5e5b0665 | 2127 | rtnl_unlock(); |
2128 | } | |
be79bd04 | 2129 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2130 | } |
2131 | ||
2132 | /** | |
2133 | * bond_3ad_rx_indication - handle a received frame | |
2134 | * @lacpdu: received lacpdu | |
2135 | * @slave: slave struct to work on | |
2136 | * @length: length of the data received | |
2137 | * | |
2138 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2139 | * received frames (loopback). Since only the payload is given to this | |
2140 | * function, it check for loopback. | |
2141 | */ | |
3bf2d28a VF |
2142 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, |
2143 | u16 length) | |
1da177e4 LT |
2144 | { |
2145 | struct port *port; | |
13a8e0c8 | 2146 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2147 | |
2148 | if (length >= sizeof(struct lacpdu)) { | |
2149 | ||
3fdddd85 | 2150 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2151 | |
2152 | if (!port->slave) { | |
d4471f5e VF |
2153 | net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", |
2154 | slave->dev->name, slave->bond->dev->name); | |
13a8e0c8 | 2155 | return ret; |
1da177e4 LT |
2156 | } |
2157 | ||
2158 | switch (lacpdu->subtype) { | |
2159 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2160 | ret = RX_HANDLER_CONSUMED; |
d4471f5e VF |
2161 | netdev_dbg(slave->bond->dev, "Received LACPDU on port %d\n", |
2162 | port->actor_port_number); | |
16d79d7d | 2163 | /* Protect against concurrent state machines */ |
9ac3524a | 2164 | __get_state_machine_lock(port); |
1da177e4 | 2165 | ad_rx_machine(lacpdu, port); |
9ac3524a | 2166 | __release_state_machine_lock(port); |
1da177e4 LT |
2167 | break; |
2168 | ||
2169 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2170 | ret = RX_HANDLER_CONSUMED; |
3bf2d28a VF |
2171 | /* No need to convert fields to Little Endian since we |
2172 | * don't use the marker's fields. | |
2173 | */ | |
1da177e4 | 2174 | |
1c3f0b8e | 2175 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2176 | case AD_MARKER_INFORMATION_SUBTYPE: |
d4471f5e VF |
2177 | netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", |
2178 | port->actor_port_number); | |
1c3f0b8e | 2179 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2180 | break; |
2181 | ||
2182 | case AD_MARKER_RESPONSE_SUBTYPE: | |
d4471f5e VF |
2183 | netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", |
2184 | port->actor_port_number); | |
1c3f0b8e | 2185 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2186 | break; |
2187 | ||
2188 | default: | |
d4471f5e VF |
2189 | netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", |
2190 | port->actor_port_number); | |
1da177e4 LT |
2191 | } |
2192 | } | |
2193 | } | |
13a8e0c8 | 2194 | return ret; |
1da177e4 LT |
2195 | } |
2196 | ||
2197 | /** | |
2198 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2199 | * @slave: slave struct to work on | |
2200 | * | |
2201 | * Handle reselection of aggregator (if needed) for this port. | |
2202 | */ | |
2203 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2204 | { | |
2205 | struct port *port; | |
2206 | ||
3fdddd85 | 2207 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2208 | |
71a06c59 | 2209 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2210 | if (!port->slave) { |
d4471f5e VF |
2211 | netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", |
2212 | slave->dev->name); | |
1da177e4 LT |
2213 | return; |
2214 | } | |
2215 | ||
71a06c59 | 2216 | __get_state_machine_lock(port); |
2217 | ||
1da177e4 | 2218 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2219 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2220 | (__get_link_speed(port) << 1); | |
d4471f5e | 2221 | netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); |
71a06c59 | 2222 | /* there is no need to reselect a new aggregator, just signal the |
2223 | * state machines to reinitialize | |
2224 | */ | |
1da177e4 | 2225 | port->sm_vars |= AD_PORT_BEGIN; |
71a06c59 | 2226 | |
2227 | __release_state_machine_lock(port); | |
1da177e4 LT |
2228 | } |
2229 | ||
2230 | /** | |
2231 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2232 | * @slave: slave struct to work on | |
2233 | * | |
2234 | * Handle reselection of aggregator (if needed) for this port. | |
2235 | */ | |
2236 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2237 | { | |
2238 | struct port *port; | |
2239 | ||
3fdddd85 | 2240 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2241 | |
bca44a73 | 2242 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2243 | if (!port->slave) { |
d4471f5e VF |
2244 | netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", |
2245 | slave->dev->name); | |
1da177e4 LT |
2246 | return; |
2247 | } | |
2248 | ||
bca44a73 | 2249 | __get_state_machine_lock(port); |
2250 | ||
1da177e4 | 2251 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2252 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2253 | __get_duplex(port); | |
d4471f5e | 2254 | netdev_dbg(slave->bond->dev, "Port %d changed duplex\n", port->actor_port_number); |
bca44a73 | 2255 | /* there is no need to reselect a new aggregator, just signal the |
2256 | * state machines to reinitialize | |
2257 | */ | |
1da177e4 | 2258 | port->sm_vars |= AD_PORT_BEGIN; |
bca44a73 | 2259 | |
2260 | __release_state_machine_lock(port); | |
1da177e4 LT |
2261 | } |
2262 | ||
2263 | /** | |
2264 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2265 | * @slave: slave struct to work on | |
2266 | * @status: whether the link is now up or down | |
2267 | * | |
2268 | * Handle reselection of aggregator (if needed) for this port. | |
2269 | */ | |
2270 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2271 | { | |
2272 | struct port *port; | |
2273 | ||
3fdddd85 | 2274 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2275 | |
108db736 | 2276 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2277 | if (!port->slave) { |
d4471f5e VF |
2278 | netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", |
2279 | slave->dev->name); | |
1da177e4 LT |
2280 | return; |
2281 | } | |
2282 | ||
108db736 | 2283 | __get_state_machine_lock(port); |
2284 | /* on link down we are zeroing duplex and speed since | |
2285 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2286 | * instead of N/A(duplex) / 0(speed). | |
2287 | * | |
2288 | * on link up we are forcing recheck on the duplex and speed since | |
2289 | * some of he adaptors(ce1000.lan) report. | |
2290 | */ | |
1da177e4 | 2291 | if (link == BOND_LINK_UP) { |
f48127b6 | 2292 | port->is_enabled = true; |
1da177e4 | 2293 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2294 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2295 | __get_duplex(port); | |
1da177e4 | 2296 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2297 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2298 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2299 | } else { |
2300 | /* link has failed */ | |
f48127b6 | 2301 | port->is_enabled = false; |
1da177e4 | 2302 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2303 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2304 | ~AD_SPEED_KEY_BITS); | |
1da177e4 | 2305 | } |
d4471f5e VF |
2306 | netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", |
2307 | port->actor_port_number, | |
2308 | link == BOND_LINK_UP ? "UP" : "DOWN"); | |
108db736 | 2309 | /* there is no need to reselect a new aggregator, just signal the |
2310 | * state machines to reinitialize | |
2311 | */ | |
1da177e4 | 2312 | port->sm_vars |= AD_PORT_BEGIN; |
108db736 | 2313 | |
2314 | __release_state_machine_lock(port); | |
1da177e4 LT |
2315 | } |
2316 | ||
3bf2d28a VF |
2317 | /** |
2318 | * bond_3ad_set_carrier - set link state for bonding master | |
2319 | * @bond - bonding structure | |
2320 | * | |
2321 | * if we have an active aggregator, we're up, if not, we're down. | |
2322 | * Presumes that we cannot have an active aggregator if there are | |
2323 | * no slaves with link up. | |
ff59c456 | 2324 | * |
031ae4de JV |
2325 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2326 | * | |
ff59c456 JV |
2327 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2328 | * change, nonzero if it does. | |
2329 | */ | |
2330 | int bond_3ad_set_carrier(struct bonding *bond) | |
2331 | { | |
655f8919 | 2332 | struct aggregator *active; |
dec1e90e | 2333 | struct slave *first_slave; |
c1bc9644 | 2334 | int ret = 1; |
655f8919 | 2335 | |
be79bd04 | 2336 | rcu_read_lock(); |
2337 | first_slave = bond_first_slave_rcu(bond); | |
c1bc9644 VF |
2338 | if (!first_slave) { |
2339 | ret = 0; | |
2340 | goto out; | |
2341 | } | |
3fdddd85 | 2342 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); |
655f8919 | 2343 | if (active) { |
2344 | /* are enough slaves available to consider link up? */ | |
2345 | if (active->num_of_ports < bond->params.min_links) { | |
2346 | if (netif_carrier_ok(bond->dev)) { | |
2347 | netif_carrier_off(bond->dev); | |
c1bc9644 | 2348 | goto out; |
655f8919 | 2349 | } |
2350 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 | 2351 | netif_carrier_on(bond->dev); |
c1bc9644 | 2352 | goto out; |
ff59c456 | 2353 | } |
c1bc9644 | 2354 | } else if (netif_carrier_ok(bond->dev)) { |
ff59c456 | 2355 | netif_carrier_off(bond->dev); |
ff59c456 | 2356 | } |
c1bc9644 VF |
2357 | out: |
2358 | rcu_read_unlock(); | |
2359 | return ret; | |
ff59c456 JV |
2360 | } |
2361 | ||
1da177e4 | 2362 | /** |
318debd8 | 2363 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2364 | * @bond: bonding struct to work on |
2365 | * @ad_info: ad_info struct to fill with the bond's info | |
2366 | * | |
2367 | * Returns: 0 on success | |
2368 | * < 0 on error | |
2369 | */ | |
318debd8 | 2370 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2371 | struct ad_info *ad_info) | |
1da177e4 LT |
2372 | { |
2373 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2374 | struct list_head *iter; |
2375 | struct slave *slave; | |
1da177e4 LT |
2376 | struct port *port; |
2377 | ||
47e91f56 | 2378 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2379 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2380 | if (port->aggregator && port->aggregator->is_active) { |
2381 | aggregator = port->aggregator; | |
2382 | break; | |
2383 | } | |
2384 | } | |
2385 | ||
21f374c6 JP |
2386 | if (!aggregator) |
2387 | return -1; | |
2388 | ||
2389 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2390 | ad_info->ports = aggregator->num_of_ports; | |
2391 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2392 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2393 | ether_addr_copy(ad_info->partner_system, | |
2394 | aggregator->partner_system.mac_addr_value); | |
2395 | return 0; | |
1da177e4 LT |
2396 | } |
2397 | ||
318debd8 | 2398 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
2399 | { | |
2400 | int ret; | |
2401 | ||
47e91f56 | 2402 | rcu_read_lock(); |
318debd8 | 2403 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2404 | rcu_read_unlock(); |
318debd8 | 2405 | |
2406 | return ret; | |
2407 | } | |
2408 | ||
1da177e4 LT |
2409 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) |
2410 | { | |
454d7c9b | 2411 | struct bonding *bond = netdev_priv(dev); |
c33d7887 VF |
2412 | struct slave *slave, *first_ok_slave; |
2413 | struct aggregator *agg; | |
2414 | struct ad_info ad_info; | |
9caff1e7 | 2415 | struct list_head *iter; |
1da177e4 | 2416 | int slaves_in_agg; |
c33d7887 | 2417 | int slave_agg_no; |
c33d7887 | 2418 | int agg_id; |
1da177e4 | 2419 | |
318debd8 | 2420 | if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { |
d4471f5e | 2421 | netdev_dbg(dev, "__bond_3ad_get_active_agg_info failed\n"); |
a742e1f5 | 2422 | goto err_free; |
1da177e4 LT |
2423 | } |
2424 | ||
2425 | slaves_in_agg = ad_info.ports; | |
2426 | agg_id = ad_info.aggregator_id; | |
2427 | ||
2428 | if (slaves_in_agg == 0) { | |
d4471f5e | 2429 | netdev_dbg(dev, "active aggregator is empty\n"); |
a742e1f5 | 2430 | goto err_free; |
1da177e4 LT |
2431 | } |
2432 | ||
ee62e868 | 2433 | slave_agg_no = bond_xmit_hash(bond, skb) % slaves_in_agg; |
c33d7887 | 2434 | first_ok_slave = NULL; |
1da177e4 | 2435 | |
47e91f56 | 2436 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2437 | agg = SLAVE_AD_INFO(slave)->port.aggregator; |
c33d7887 VF |
2438 | if (!agg || agg->aggregator_identifier != agg_id) |
2439 | continue; | |
1da177e4 | 2440 | |
c33d7887 | 2441 | if (slave_agg_no >= 0) { |
8557cd74 | 2442 | if (!first_ok_slave && bond_slave_can_tx(slave)) |
c33d7887 | 2443 | first_ok_slave = slave; |
1da177e4 | 2444 | slave_agg_no--; |
c33d7887 VF |
2445 | continue; |
2446 | } | |
2447 | ||
8557cd74 | 2448 | if (bond_slave_can_tx(slave)) { |
a742e1f5 | 2449 | bond_dev_queue_xmit(bond, skb, slave->dev); |
c33d7887 | 2450 | goto out; |
1da177e4 LT |
2451 | } |
2452 | } | |
2453 | ||
2454 | if (slave_agg_no >= 0) { | |
d4471f5e VF |
2455 | netdev_err(dev, "Couldn't find a slave to tx on for aggregator ID %d\n", |
2456 | agg_id); | |
a742e1f5 | 2457 | goto err_free; |
1da177e4 LT |
2458 | } |
2459 | ||
c33d7887 | 2460 | /* we couldn't find any suitable slave after the agg_no, so use the |
3bf2d28a VF |
2461 | * first suitable found, if found. |
2462 | */ | |
c33d7887 | 2463 | if (first_ok_slave) |
a742e1f5 | 2464 | bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); |
2465 | else | |
2466 | goto err_free; | |
1da177e4 LT |
2467 | |
2468 | out: | |
ec634fe3 | 2469 | return NETDEV_TX_OK; |
a742e1f5 | 2470 | err_free: |
2471 | /* no suitable interface, frame not sent */ | |
2bb77ab4 | 2472 | dev_kfree_skb_any(skb); |
a742e1f5 | 2473 | goto out; |
1da177e4 LT |
2474 | } |
2475 | ||
de063b70 ED |
2476 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2477 | struct slave *slave) | |
1da177e4 | 2478 | { |
de063b70 ED |
2479 | struct lacpdu *lacpdu, _lacpdu; |
2480 | ||
3aba891d | 2481 | if (skb->protocol != PKT_TYPE_LACPDU) |
86e74986 | 2482 | return RX_HANDLER_ANOTHER; |
b3053251 | 2483 | |
de063b70 ED |
2484 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2485 | if (!lacpdu) | |
86e74986 | 2486 | return RX_HANDLER_ANOTHER; |
ab12811c | 2487 | |
86e74986 | 2488 | return bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2489 | } |
ba824a8b | 2490 | |
3bf2d28a VF |
2491 | /** |
2492 | * bond_3ad_update_lacp_rate - change the lacp rate | |
2493 | * @bond - bonding struct | |
2494 | * | |
ba824a8b PP |
2495 | * When modify lacp_rate parameter via sysfs, |
2496 | * update actor_oper_port_state of each port. | |
2497 | * | |
2498 | * Hold slave->state_machine_lock, | |
2499 | * so we can modify port->actor_oper_port_state, | |
2500 | * no matter bond is up or down. | |
2501 | */ | |
2502 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2503 | { | |
ba824a8b | 2504 | struct port *port = NULL; |
9caff1e7 | 2505 | struct list_head *iter; |
c509316b | 2506 | struct slave *slave; |
ba824a8b PP |
2507 | int lacp_fast; |
2508 | ||
ba824a8b | 2509 | lacp_fast = bond->params.lacp_fast; |
9caff1e7 | 2510 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 2511 | port = &(SLAVE_AD_INFO(slave)->port); |
ba824a8b PP |
2512 | __get_state_machine_lock(port); |
2513 | if (lacp_fast) | |
2514 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2515 | else | |
2516 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
2517 | __release_state_machine_lock(port); | |
2518 | } | |
ba824a8b | 2519 | } |