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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 | ||
1da177e4 LT |
236 | /** |
237 | * __get_link_speed - get a port's speed | |
238 | * @port: the port we're looking at | |
239 | * | |
240 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
241 | * 0, | |
242 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
243 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
244 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
245 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
246 | */ |
247 | static u16 __get_link_speed(struct port *port) | |
248 | { | |
249 | struct slave *slave = port->slave; | |
250 | u16 speed; | |
251 | ||
3bf2d28a VF |
252 | /* this if covers only a special case: when the configuration starts |
253 | * with link down, it sets the speed to 0. | |
254 | * This is done in spite of the fact that the e100 driver reports 0 | |
255 | * to be compatible with MVT in the future. | |
256 | */ | |
7bfc4753 | 257 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 258 | speed = 0; |
7bfc4753 | 259 | else { |
1da177e4 LT |
260 | switch (slave->speed) { |
261 | case SPEED_10: | |
262 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
263 | break; | |
264 | ||
265 | case SPEED_100: | |
266 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
267 | break; | |
268 | ||
269 | case SPEED_1000: | |
270 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
271 | break; | |
272 | ||
94dbffd5 JV |
273 | case SPEED_10000: |
274 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
275 | break; | |
276 | ||
1da177e4 | 277 | default: |
3bf2d28a VF |
278 | /* unknown speed value from ethtool. shouldn't happen */ |
279 | speed = 0; | |
1da177e4 LT |
280 | break; |
281 | } | |
282 | } | |
283 | ||
d4471f5e VF |
284 | netdev_dbg(slave->bond->dev, "Port %d Received link speed %d update from adapter\n", |
285 | port->actor_port_number, speed); | |
1da177e4 LT |
286 | return speed; |
287 | } | |
288 | ||
289 | /** | |
290 | * __get_duplex - get a port's duplex | |
291 | * @port: the port we're looking at | |
292 | * | |
293 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
294 | * 0x01 if in full duplex | |
295 | * 0x00 otherwise | |
296 | */ | |
297 | static u8 __get_duplex(struct port *port) | |
298 | { | |
299 | struct slave *slave = port->slave; | |
300 | ||
301 | u8 retval; | |
302 | ||
3bf2d28a VF |
303 | /* handling a special case: when the configuration starts with |
304 | * link down, it sets the duplex to 0. | |
305 | */ | |
7bfc4753 | 306 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 307 | retval = 0x0; |
7bfc4753 | 308 | else { |
1da177e4 LT |
309 | switch (slave->duplex) { |
310 | case DUPLEX_FULL: | |
128ea6c3 | 311 | retval = 0x1; |
d4471f5e VF |
312 | netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", |
313 | port->actor_port_number); | |
1da177e4 LT |
314 | break; |
315 | case DUPLEX_HALF: | |
316 | default: | |
128ea6c3 | 317 | retval = 0x0; |
d4471f5e VF |
318 | netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", |
319 | port->actor_port_number); | |
1da177e4 LT |
320 | break; |
321 | } | |
322 | } | |
323 | return retval; | |
324 | } | |
325 | ||
3bf2d28a | 326 | /* Conversions */ |
1da177e4 LT |
327 | |
328 | /** | |
329 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
330 | * @timer_type: which timer to operate | |
331 | * @par: timer parameter. see below | |
332 | * | |
333 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
334 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
3bf2d28a | 335 | * %SLOW_PERIODIC_TIME. |
1da177e4 LT |
336 | */ |
337 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
338 | { | |
128ea6c3 | 339 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
340 | |
341 | switch (timer_type) { | |
3bf2d28a | 342 | case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ |
7bfc4753 | 343 | if (par) |
3bf2d28a | 344 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); |
7bfc4753 | 345 | else |
3bf2d28a | 346 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); |
1da177e4 | 347 | break; |
3bf2d28a | 348 | case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ |
1da177e4 LT |
349 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
350 | break; | |
3bf2d28a VF |
351 | case AD_PERIODIC_TIMER: /* for periodic machine */ |
352 | retval = (par*ad_ticks_per_sec); /* long timeout */ | |
1da177e4 | 353 | break; |
3bf2d28a | 354 | case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ |
1da177e4 LT |
355 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
356 | break; | |
3bf2d28a | 357 | case AD_WAIT_WHILE_TIMER: /* for selection machine */ |
1da177e4 LT |
358 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); |
359 | break; | |
360 | } | |
3bf2d28a | 361 | |
1da177e4 LT |
362 | return retval; |
363 | } | |
364 | ||
365 | ||
3bf2d28a | 366 | /* ================= ad_rx_machine helper functions ================== */ |
1da177e4 | 367 | |
2d6682db JV |
368 | /** |
369 | * __choose_matched - update a port's matched variable from a received lacpdu | |
370 | * @lacpdu: the lacpdu we've received | |
371 | * @port: the port we're looking at | |
372 | * | |
373 | * Update the value of the matched variable, using parameter values from a | |
374 | * newly received lacpdu. Parameter values for the partner carried in the | |
375 | * received PDU are compared with the corresponding operational parameter | |
376 | * values for the actor. Matched is set to TRUE if all of these parameters | |
377 | * match and the PDU parameter partner_state.aggregation has the same value as | |
378 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
379 | * in the aggregation. Matched is also set to TRUE if the value of | |
380 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
381 | * an individual link and lacp will actively maintain the link. Otherwise, | |
382 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
383 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
384 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
385 | * partner_state.lacp_activity variables are TRUE. | |
386 | * | |
387 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
388 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
389 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
390 | */ | |
391 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
392 | { | |
815117ad | 393 | /* check if all parameters are alike |
394 | * or this is individual link(aggregation == FALSE) | |
395 | * then update the state machine Matched variable. | |
396 | */ | |
2d6682db JV |
397 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
398 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
815117ad | 399 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
2d6682db JV |
400 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
401 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
402 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
2d6682db JV |
403 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
404 | ) { | |
2d6682db JV |
405 | port->sm_vars |= AD_PORT_MATCHED; |
406 | } else { | |
407 | port->sm_vars &= ~AD_PORT_MATCHED; | |
408 | } | |
409 | } | |
410 | ||
1da177e4 LT |
411 | /** |
412 | * __record_pdu - record parameters from a received lacpdu | |
413 | * @lacpdu: the lacpdu we've received | |
414 | * @port: the port we're looking at | |
415 | * | |
416 | * Record the parameter values for the Actor carried in a received lacpdu as | |
417 | * the current partner operational parameter values and sets | |
418 | * actor_oper_port_state.defaulted to FALSE. | |
419 | */ | |
420 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
421 | { | |
1da177e4 | 422 | if (lacpdu && port) { |
b99d6ba9 HE |
423 | struct port_params *partner = &port->partner_oper; |
424 | ||
2d6682db | 425 | __choose_matched(lacpdu, port); |
3bf2d28a VF |
426 | /* record the new parameter values for the partner |
427 | * operational | |
428 | */ | |
b99d6ba9 HE |
429 | partner->port_number = ntohs(lacpdu->actor_port); |
430 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
431 | partner->system = lacpdu->actor_system; | |
432 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
433 | partner->key = ntohs(lacpdu->actor_key); | |
434 | partner->port_state = lacpdu->actor_state; | |
1da177e4 | 435 | |
3bf2d28a | 436 | /* set actor_oper_port_state.defaulted to FALSE */ |
1da177e4 LT |
437 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; |
438 | ||
3bf2d28a VF |
439 | /* set the partner sync. to on if the partner is sync, |
440 | * and the port is matched | |
441 | */ | |
7bfc4753 BD |
442 | if ((port->sm_vars & AD_PORT_MATCHED) |
443 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 444 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 445 | else |
b99d6ba9 | 446 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
447 | } |
448 | } | |
449 | ||
450 | /** | |
451 | * __record_default - record default parameters | |
452 | * @port: the port we're looking at | |
453 | * | |
454 | * This function records the default parameter values for the partner carried | |
455 | * in the Partner Admin parameters as the current partner operational parameter | |
456 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
457 | */ | |
458 | static void __record_default(struct port *port) | |
459 | { | |
1da177e4 | 460 | if (port) { |
3bf2d28a | 461 | /* record the partner admin parameters */ |
5eefd1ad HE |
462 | memcpy(&port->partner_oper, &port->partner_admin, |
463 | sizeof(struct port_params)); | |
1da177e4 | 464 | |
3bf2d28a | 465 | /* set actor_oper_port_state.defaulted to true */ |
1da177e4 LT |
466 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; |
467 | } | |
468 | } | |
469 | ||
470 | /** | |
471 | * __update_selected - update a port's Selected variable from a received lacpdu | |
472 | * @lacpdu: the lacpdu we've received | |
473 | * @port: the port we're looking at | |
474 | * | |
475 | * Update the value of the selected variable, using parameter values from a | |
476 | * newly received lacpdu. The parameter values for the Actor carried in the | |
477 | * received PDU are compared with the corresponding operational parameter | |
478 | * values for the ports partner. If one or more of the comparisons shows that | |
479 | * the value(s) received in the PDU differ from the current operational values, | |
480 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
481 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
482 | */ | |
483 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
484 | { | |
1da177e4 | 485 | if (lacpdu && port) { |
ce6a49ad HE |
486 | const struct port_params *partner = &port->partner_oper; |
487 | ||
815117ad | 488 | /* check if any parameter is different then |
489 | * update the state machine selected variable. | |
490 | */ | |
8e95a202 JP |
491 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
492 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
815117ad | 493 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
8e95a202 JP |
494 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
495 | ntohs(lacpdu->actor_key) != partner->key || | |
496 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
497 | port->sm_vars &= ~AD_PORT_SELECTED; |
498 | } | |
499 | } | |
500 | } | |
501 | ||
502 | /** | |
503 | * __update_default_selected - update a port's Selected variable from Partner | |
504 | * @port: the port we're looking at | |
505 | * | |
506 | * This function updates the value of the selected variable, using the partner | |
507 | * administrative parameter values. The administrative values are compared with | |
508 | * the corresponding operational parameter values for the partner. If one or | |
509 | * more of the comparisons shows that the administrative value(s) differ from | |
510 | * the current operational values, then Selected is set to FALSE and | |
511 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
512 | * Selected remains unchanged. | |
513 | */ | |
514 | static void __update_default_selected(struct port *port) | |
515 | { | |
1da177e4 | 516 | if (port) { |
3c52065f HE |
517 | const struct port_params *admin = &port->partner_admin; |
518 | const struct port_params *oper = &port->partner_oper; | |
519 | ||
815117ad | 520 | /* check if any parameter is different then |
521 | * update the state machine selected variable. | |
522 | */ | |
8e95a202 JP |
523 | if (admin->port_number != oper->port_number || |
524 | admin->port_priority != oper->port_priority || | |
815117ad | 525 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
8e95a202 JP |
526 | admin->system_priority != oper->system_priority || |
527 | admin->key != oper->key || | |
528 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 529 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
530 | port->sm_vars &= ~AD_PORT_SELECTED; |
531 | } | |
532 | } | |
533 | } | |
534 | ||
1da177e4 LT |
535 | /** |
536 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
537 | * @lacpdu: the lacpdu we've received | |
538 | * @port: the port we're looking at | |
539 | * | |
540 | * Updates the value of the ntt variable, using parameter values from a newly | |
541 | * received lacpdu. The parameter values for the partner carried in the | |
542 | * received PDU are compared with the corresponding operational parameter | |
543 | * values for the Actor. If one or more of the comparisons shows that the | |
544 | * value(s) received in the PDU differ from the current operational values, | |
545 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
546 | */ | |
547 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
548 | { | |
815117ad | 549 | /* validate lacpdu and port */ |
1da177e4 | 550 | if (lacpdu && port) { |
815117ad | 551 | /* check if any parameter is different then |
552 | * update the port->ntt. | |
553 | */ | |
89cc76f9 JV |
554 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
555 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
815117ad | 556 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
557 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
558 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
559 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
560 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
561 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
562 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
563 | ) { | |
d238d458 | 564 | port->ntt = true; |
1da177e4 LT |
565 | } |
566 | } | |
567 | } | |
568 | ||
1da177e4 LT |
569 | /** |
570 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
571 | * @aggregator: the aggregator we're looking at | |
572 | * | |
573 | */ | |
574 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
575 | { | |
576 | struct port *port; | |
577 | int retval = 1; | |
578 | ||
579 | if (aggregator) { | |
3bf2d28a VF |
580 | /* scan all ports in this aggregator to verfy if they are |
581 | * all ready. | |
582 | */ | |
128ea6c3 BD |
583 | for (port = aggregator->lag_ports; |
584 | port; | |
585 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
586 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
587 | retval = 0; | |
588 | break; | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | return retval; | |
594 | } | |
595 | ||
596 | /** | |
597 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
598 | * @aggregator: the aggregator we're looking at | |
599 | * @val: Should the ports' ready bit be set on or off | |
600 | * | |
601 | */ | |
602 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
603 | { | |
604 | struct port *port; | |
605 | ||
128ea6c3 BD |
606 | for (port = aggregator->lag_ports; port; |
607 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 608 | if (val) |
1da177e4 | 609 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 610 | else |
1da177e4 | 611 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
612 | } |
613 | } | |
614 | ||
615 | /** | |
616 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
617 | * @aggregator: the aggregator we're looking at | |
618 | * | |
619 | */ | |
620 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
621 | { | |
128ea6c3 | 622 | u32 bandwidth = 0; |
1da177e4 LT |
623 | |
624 | if (aggregator->num_of_ports) { | |
65cce19c | 625 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
626 | case AD_LINK_SPEED_BITMASK_1MBPS: |
627 | bandwidth = aggregator->num_of_ports; | |
628 | break; | |
629 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
630 | bandwidth = aggregator->num_of_ports * 10; | |
631 | break; | |
632 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
633 | bandwidth = aggregator->num_of_ports * 100; | |
634 | break; | |
635 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
636 | bandwidth = aggregator->num_of_ports * 1000; | |
637 | break; | |
94dbffd5 JV |
638 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
639 | bandwidth = aggregator->num_of_ports * 10000; | |
640 | break; | |
1da177e4 | 641 | default: |
3bf2d28a | 642 | bandwidth = 0; /* to silence the compiler */ |
1da177e4 LT |
643 | } |
644 | } | |
645 | return bandwidth; | |
646 | } | |
647 | ||
648 | /** | |
649 | * __get_active_agg - get the current active aggregator | |
650 | * @aggregator: the aggregator we're looking at | |
49b7624e VF |
651 | * |
652 | * Caller must hold RCU lock. | |
1da177e4 LT |
653 | */ |
654 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
655 | { | |
19177e7d VF |
656 | struct bonding *bond = aggregator->slave->bond; |
657 | struct list_head *iter; | |
658 | struct slave *slave; | |
1da177e4 | 659 | |
be79bd04 | 660 | bond_for_each_slave_rcu(bond, slave, iter) |
3fdddd85 | 661 | if (SLAVE_AD_INFO(slave)->aggregator.is_active) |
662 | return &(SLAVE_AD_INFO(slave)->aggregator); | |
1da177e4 | 663 | |
19177e7d | 664 | return NULL; |
1da177e4 LT |
665 | } |
666 | ||
667 | /** | |
668 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
669 | * @port: the port we're looking at | |
1da177e4 LT |
670 | */ |
671 | static inline void __update_lacpdu_from_port(struct port *port) | |
672 | { | |
673 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 674 | const struct port_params *partner = &port->partner_oper; |
1da177e4 | 675 | |
3bf2d28a VF |
676 | /* update current actual Actor parameters |
677 | * lacpdu->subtype initialized | |
1da177e4 LT |
678 | * lacpdu->version_number initialized |
679 | * lacpdu->tlv_type_actor_info initialized | |
680 | * lacpdu->actor_information_length initialized | |
681 | */ | |
682 | ||
d3bb52b0 | 683 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 684 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
685 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
686 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
687 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
688 | lacpdu->actor_state = port->actor_oper_port_state; |
689 | ||
690 | /* lacpdu->reserved_3_1 initialized | |
691 | * lacpdu->tlv_type_partner_info initialized | |
692 | * lacpdu->partner_information_length initialized | |
693 | */ | |
694 | ||
3b5b35d0 HE |
695 | lacpdu->partner_system_priority = htons(partner->system_priority); |
696 | lacpdu->partner_system = partner->system; | |
697 | lacpdu->partner_key = htons(partner->key); | |
698 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
699 | lacpdu->partner_port = htons(partner->port_number); | |
700 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
701 | |
702 | /* lacpdu->reserved_3_2 initialized | |
703 | * lacpdu->tlv_type_collector_info initialized | |
704 | * lacpdu->collector_information_length initialized | |
705 | * collector_max_delay initialized | |
706 | * reserved_12[12] initialized | |
707 | * tlv_type_terminator initialized | |
708 | * terminator_length initialized | |
709 | * reserved_50[50] initialized | |
710 | */ | |
1da177e4 LT |
711 | } |
712 | ||
3bf2d28a | 713 | /* ================= main 802.3ad protocol code ========================= */ |
1da177e4 LT |
714 | |
715 | /** | |
716 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
717 | * @port: the port we're looking at | |
718 | * | |
719 | * Returns: 0 on success | |
720 | * < 0 on error | |
721 | */ | |
722 | static int ad_lacpdu_send(struct port *port) | |
723 | { | |
724 | struct slave *slave = port->slave; | |
725 | struct sk_buff *skb; | |
726 | struct lacpdu_header *lacpdu_header; | |
727 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
728 | |
729 | skb = dev_alloc_skb(length); | |
7bfc4753 | 730 | if (!skb) |
1da177e4 | 731 | return -ENOMEM; |
1da177e4 LT |
732 | |
733 | skb->dev = slave->dev; | |
459a98ed | 734 | skb_reset_mac_header(skb); |
b0e380b1 | 735 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
736 | skb->protocol = PKT_TYPE_LACPDU; |
737 | skb->priority = TC_PRIO_CONTROL; | |
738 | ||
739 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
740 | ||
ada0f863 | 741 | ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 742 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
743 | * because we use it to identify loopback lacpdus in receive. |
744 | */ | |
ada0f863 | 745 | ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 746 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 747 | |
3bf2d28a | 748 | lacpdu_header->lacpdu = port->lacpdu; |
1da177e4 LT |
749 | |
750 | dev_queue_xmit(skb); | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | /** | |
756 | * ad_marker_send - send marker information/response on a given port | |
757 | * @port: the port we're looking at | |
758 | * @marker: marker data to send | |
759 | * | |
760 | * Returns: 0 on success | |
761 | * < 0 on error | |
762 | */ | |
1c3f0b8e | 763 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
764 | { |
765 | struct slave *slave = port->slave; | |
766 | struct sk_buff *skb; | |
1c3f0b8e MD |
767 | struct bond_marker_header *marker_header; |
768 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
769 | |
770 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 771 | if (!skb) |
1da177e4 | 772 | return -ENOMEM; |
1da177e4 LT |
773 | |
774 | skb_reserve(skb, 16); | |
775 | ||
776 | skb->dev = slave->dev; | |
459a98ed | 777 | skb_reset_mac_header(skb); |
b0e380b1 | 778 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
779 | skb->protocol = PKT_TYPE_LACPDU; |
780 | ||
1c3f0b8e | 781 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 782 | |
ada0f863 | 783 | ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 784 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
785 | * because we use it to identify loopback MARKERs in receive. |
786 | */ | |
ada0f863 | 787 | ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 788 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 789 | |
3bf2d28a | 790 | marker_header->marker = *marker; |
1da177e4 LT |
791 | |
792 | dev_queue_xmit(skb); | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | /** | |
798 | * ad_mux_machine - handle a port's mux state machine | |
799 | * @port: the port we're looking at | |
1da177e4 LT |
800 | */ |
801 | static void ad_mux_machine(struct port *port) | |
802 | { | |
803 | mux_states_t last_state; | |
804 | ||
3bf2d28a VF |
805 | /* keep current State Machine state to compare later if it was |
806 | * changed | |
807 | */ | |
1da177e4 LT |
808 | last_state = port->sm_mux_state; |
809 | ||
810 | if (port->sm_vars & AD_PORT_BEGIN) { | |
3bf2d28a | 811 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
812 | } else { |
813 | switch (port->sm_mux_state) { | |
814 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
815 | if ((port->sm_vars & AD_PORT_SELECTED) |
816 | || (port->sm_vars & AD_PORT_STANDBY)) | |
817 | /* if SELECTED or STANDBY */ | |
3bf2d28a | 818 | port->sm_mux_state = AD_MUX_WAITING; |
1da177e4 LT |
819 | break; |
820 | case AD_MUX_WAITING: | |
3bf2d28a VF |
821 | /* if SELECTED == FALSE return to DETACH state */ |
822 | if (!(port->sm_vars & AD_PORT_SELECTED)) { | |
1da177e4 | 823 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
824 | /* in order to withhold the Selection Logic to |
825 | * check all ports READY_N value every callback | |
826 | * cycle to update ready variable, we check | |
827 | * READY_N and update READY here | |
828 | */ | |
1da177e4 | 829 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 830 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
831 | break; |
832 | } | |
833 | ||
3bf2d28a | 834 | /* check if the wait_while_timer expired */ |
7bfc4753 BD |
835 | if (port->sm_mux_timer_counter |
836 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 837 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 | 838 | |
3bf2d28a VF |
839 | /* in order to withhold the selection logic to check |
840 | * all ports READY_N value every callback cycle to | |
841 | * update ready variable, we check READY_N and update | |
842 | * READY here | |
843 | */ | |
1da177e4 LT |
844 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
845 | ||
3bf2d28a VF |
846 | /* if the wait_while_timer expired, and the port is |
847 | * in READY state, move to ATTACHED state | |
848 | */ | |
7bfc4753 BD |
849 | if ((port->sm_vars & AD_PORT_READY) |
850 | && !port->sm_mux_timer_counter) | |
3bf2d28a | 851 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 LT |
852 | break; |
853 | case AD_MUX_ATTACHED: | |
3bf2d28a VF |
854 | /* check also if agg_select_timer expired (so the |
855 | * edable port will take place only after this timer) | |
856 | */ | |
857 | if ((port->sm_vars & AD_PORT_SELECTED) && | |
858 | (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && | |
859 | !__check_agg_selection_timer(port)) { | |
860 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING; | |
861 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || | |
862 | (port->sm_vars & AD_PORT_STANDBY)) { | |
863 | /* if UNSELECTED or STANDBY */ | |
1da177e4 | 864 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
865 | /* in order to withhold the selection logic to |
866 | * check all ports READY_N value every callback | |
867 | * cycle to update ready variable, we check | |
868 | * READY_N and update READY here | |
869 | */ | |
1da177e4 | 870 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 871 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
872 | } |
873 | break; | |
874 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
3bf2d28a VF |
875 | if (!(port->sm_vars & AD_PORT_SELECTED) || |
876 | (port->sm_vars & AD_PORT_STANDBY) || | |
877 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) { | |
878 | port->sm_mux_state = AD_MUX_ATTACHED; | |
1da177e4 | 879 | } else { |
3bf2d28a VF |
880 | /* if port state hasn't changed make |
881 | * sure that a collecting distributing | |
882 | * port in an active aggregator is enabled | |
883 | */ | |
1da177e4 LT |
884 | if (port->aggregator && |
885 | port->aggregator->is_active && | |
886 | !__port_is_enabled(port)) { | |
887 | ||
888 | __enable_port(port); | |
889 | } | |
890 | } | |
891 | break; | |
3bf2d28a | 892 | default: |
1da177e4 LT |
893 | break; |
894 | } | |
895 | } | |
896 | ||
3bf2d28a | 897 | /* check if the state machine was changed */ |
1da177e4 | 898 | if (port->sm_mux_state != last_state) { |
a4aee5c8 JP |
899 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
900 | port->actor_port_number, last_state, | |
901 | port->sm_mux_state); | |
1da177e4 LT |
902 | switch (port->sm_mux_state) { |
903 | case AD_MUX_DETACHED: | |
1da177e4 LT |
904 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
905 | ad_disable_collecting_distributing(port); | |
906 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
907 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 908 | port->ntt = true; |
1da177e4 LT |
909 | break; |
910 | case AD_MUX_WAITING: | |
911 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
912 | break; | |
913 | case AD_MUX_ATTACHED: | |
1da177e4 LT |
914 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; |
915 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
916 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
917 | ad_disable_collecting_distributing(port); | |
d238d458 | 918 | port->ntt = true; |
1da177e4 LT |
919 | break; |
920 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
921 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
922 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
923 | ad_enable_collecting_distributing(port); | |
d238d458 | 924 | port->ntt = true; |
1da177e4 | 925 | break; |
3bf2d28a | 926 | default: |
1da177e4 LT |
927 | break; |
928 | } | |
929 | } | |
930 | } | |
931 | ||
932 | /** | |
933 | * ad_rx_machine - handle a port's rx State Machine | |
934 | * @lacpdu: the lacpdu we've received | |
935 | * @port: the port we're looking at | |
936 | * | |
937 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
938 | * CURRENT. If timer expired set the state machine in the proper state. | |
939 | * In other cases, this function checks if we need to switch to other state. | |
940 | */ | |
941 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
942 | { | |
943 | rx_states_t last_state; | |
944 | ||
3bf2d28a VF |
945 | /* keep current State Machine state to compare later if it was |
946 | * changed | |
947 | */ | |
1da177e4 LT |
948 | last_state = port->sm_rx_state; |
949 | ||
3bf2d28a VF |
950 | /* check if state machine should change state */ |
951 | ||
952 | /* first, check if port was reinitialized */ | |
7bfc4753 | 953 | if (port->sm_vars & AD_PORT_BEGIN) |
7bfc4753 | 954 | port->sm_rx_state = AD_RX_INITIALIZE; |
3bf2d28a | 955 | /* check if port is not enabled */ |
7bfc4753 BD |
956 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
957 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
7bfc4753 | 958 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
3bf2d28a VF |
959 | /* check if new lacpdu arrived */ |
960 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || | |
961 | (port->sm_rx_state == AD_RX_DEFAULTED) || | |
962 | (port->sm_rx_state == AD_RX_CURRENT))) { | |
963 | port->sm_rx_timer_counter = 0; | |
1da177e4 LT |
964 | port->sm_rx_state = AD_RX_CURRENT; |
965 | } else { | |
3bf2d28a VF |
966 | /* if timer is on, and if it is expired */ |
967 | if (port->sm_rx_timer_counter && | |
968 | !(--port->sm_rx_timer_counter)) { | |
1da177e4 LT |
969 | switch (port->sm_rx_state) { |
970 | case AD_RX_EXPIRED: | |
3bf2d28a | 971 | port->sm_rx_state = AD_RX_DEFAULTED; |
1da177e4 LT |
972 | break; |
973 | case AD_RX_CURRENT: | |
3bf2d28a | 974 | port->sm_rx_state = AD_RX_EXPIRED; |
1da177e4 | 975 | break; |
3bf2d28a | 976 | default: |
1da177e4 LT |
977 | break; |
978 | } | |
979 | } else { | |
3bf2d28a | 980 | /* if no lacpdu arrived and no timer is on */ |
1da177e4 LT |
981 | switch (port->sm_rx_state) { |
982 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 983 | if (port->sm_vars & AD_PORT_MOVED) |
3bf2d28a | 984 | port->sm_rx_state = AD_RX_INITIALIZE; |
7bfc4753 BD |
985 | else if (port->is_enabled |
986 | && (port->sm_vars | |
987 | & AD_PORT_LACP_ENABLED)) | |
3bf2d28a | 988 | port->sm_rx_state = AD_RX_EXPIRED; |
7bfc4753 BD |
989 | else if (port->is_enabled |
990 | && ((port->sm_vars | |
991 | & AD_PORT_LACP_ENABLED) == 0)) | |
3bf2d28a | 992 | port->sm_rx_state = AD_RX_LACP_DISABLED; |
1da177e4 | 993 | break; |
3bf2d28a | 994 | default: |
1da177e4 LT |
995 | break; |
996 | ||
997 | } | |
998 | } | |
999 | } | |
1000 | ||
3bf2d28a | 1001 | /* check if the State machine was changed or new lacpdu arrived */ |
1da177e4 | 1002 | if ((port->sm_rx_state != last_state) || (lacpdu)) { |
a4aee5c8 JP |
1003 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1004 | port->actor_port_number, last_state, | |
1005 | port->sm_rx_state); | |
1da177e4 LT |
1006 | switch (port->sm_rx_state) { |
1007 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1008 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1009 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1010 | else |
1da177e4 | 1011 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1012 | port->sm_vars &= ~AD_PORT_SELECTED; |
1013 | __record_default(port); | |
1014 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1015 | port->sm_vars &= ~AD_PORT_MOVED; | |
3bf2d28a | 1016 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
1da177e4 | 1017 | |
3bf2d28a | 1018 | /* Fall Through */ |
1da177e4 LT |
1019 | case AD_RX_PORT_DISABLED: |
1020 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1021 | break; | |
1022 | case AD_RX_LACP_DISABLED: | |
1023 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1024 | __record_default(port); | |
1055c9ab | 1025 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1026 | port->sm_vars |= AD_PORT_MATCHED; |
1027 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1028 | break; | |
1029 | case AD_RX_EXPIRED: | |
3bf2d28a VF |
1030 | /* Reset of the Synchronization flag (Standard 43.4.12) |
1031 | * This reset cause to disable this port in the | |
1032 | * COLLECTING_DISTRIBUTING state of the mux machine in | |
1033 | * case of EXPIRED even if LINK_DOWN didn't arrive for | |
1034 | * the port. | |
1035 | */ | |
1055c9ab | 1036 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1037 | port->sm_vars &= ~AD_PORT_MATCHED; |
3bf2d28a | 1038 | port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; |
1da177e4 LT |
1039 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1040 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1041 | break; | |
1042 | case AD_RX_DEFAULTED: | |
1043 | __update_default_selected(port); | |
1044 | __record_default(port); | |
1045 | port->sm_vars |= AD_PORT_MATCHED; | |
1046 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1047 | break; | |
1048 | case AD_RX_CURRENT: | |
815117ad | 1049 | /* detect loopback situation */ |
3bf2d28a VF |
1050 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), |
1051 | &(port->actor_system))) { | |
d4471f5e | 1052 | netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" |
90194264 | 1053 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", |
3bf2d28a | 1054 | port->slave->dev->name); |
1da177e4 LT |
1055 | return; |
1056 | } | |
1057 | __update_selected(lacpdu, port); | |
1058 | __update_ntt(lacpdu, port); | |
1059 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1060 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1061 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 | 1062 | break; |
3bf2d28a | 1063 | default: |
1da177e4 LT |
1064 | break; |
1065 | } | |
1066 | } | |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | /** | |
1070 | * ad_tx_machine - handle a port's tx state machine | |
1071 | * @port: the port we're looking at | |
1da177e4 LT |
1072 | */ |
1073 | static void ad_tx_machine(struct port *port) | |
1074 | { | |
3bf2d28a VF |
1075 | /* check if tx timer expired, to verify that we do not send more than |
1076 | * 3 packets per second | |
1077 | */ | |
1da177e4 | 1078 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { |
3bf2d28a | 1079 | /* check if there is something to send */ |
1da177e4 LT |
1080 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { |
1081 | __update_lacpdu_from_port(port); | |
d238d458 | 1082 | |
1da177e4 | 1083 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1084 | pr_debug("Sent LACPDU on port %d\n", |
1085 | port->actor_port_number); | |
d238d458 | 1086 | |
3bf2d28a VF |
1087 | /* mark ntt as false, so it will not be sent |
1088 | * again until demanded | |
1089 | */ | |
d238d458 | 1090 | port->ntt = false; |
1da177e4 LT |
1091 | } |
1092 | } | |
3bf2d28a VF |
1093 | /* restart tx timer(to verify that we will not exceed |
1094 | * AD_MAX_TX_IN_SECOND | |
1095 | */ | |
1096 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1097 | } |
1098 | } | |
1099 | ||
1100 | /** | |
1101 | * ad_periodic_machine - handle a port's periodic state machine | |
1102 | * @port: the port we're looking at | |
1103 | * | |
1104 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1105 | */ | |
1106 | static void ad_periodic_machine(struct port *port) | |
1107 | { | |
1108 | periodic_states_t last_state; | |
1109 | ||
3bf2d28a | 1110 | /* keep current state machine state to compare later if it was changed */ |
1da177e4 LT |
1111 | last_state = port->sm_periodic_state; |
1112 | ||
3bf2d28a | 1113 | /* check if port was reinitialized */ |
1da177e4 | 1114 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || |
1055c9ab | 1115 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 | 1116 | ) { |
3bf2d28a | 1117 | port->sm_periodic_state = AD_NO_PERIODIC; |
1da177e4 | 1118 | } |
3bf2d28a | 1119 | /* check if state machine should change state */ |
1da177e4 | 1120 | else if (port->sm_periodic_timer_counter) { |
3bf2d28a | 1121 | /* check if periodic state machine expired */ |
1da177e4 | 1122 | if (!(--port->sm_periodic_timer_counter)) { |
3bf2d28a VF |
1123 | /* if expired then do tx */ |
1124 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1da177e4 | 1125 | } else { |
3bf2d28a VF |
1126 | /* If not expired, check if there is some new timeout |
1127 | * parameter from the partner state | |
1128 | */ | |
1da177e4 LT |
1129 | switch (port->sm_periodic_state) { |
1130 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1131 | if (!(port->partner_oper.port_state |
1132 | & AD_STATE_LACP_TIMEOUT)) | |
3bf2d28a | 1133 | port->sm_periodic_state = AD_SLOW_PERIODIC; |
1da177e4 LT |
1134 | break; |
1135 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1136 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 | 1137 | port->sm_periodic_timer_counter = 0; |
3bf2d28a | 1138 | port->sm_periodic_state = AD_PERIODIC_TX; |
1da177e4 LT |
1139 | } |
1140 | break; | |
3bf2d28a | 1141 | default: |
1da177e4 LT |
1142 | break; |
1143 | } | |
1144 | } | |
1145 | } else { | |
1146 | switch (port->sm_periodic_state) { | |
1147 | case AD_NO_PERIODIC: | |
3bf2d28a | 1148 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 LT |
1149 | break; |
1150 | case AD_PERIODIC_TX: | |
3bf2d28a VF |
1151 | if (!(port->partner_oper.port_state & |
1152 | AD_STATE_LACP_TIMEOUT)) | |
1153 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
7bfc4753 | 1154 | else |
3bf2d28a | 1155 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 | 1156 | break; |
3bf2d28a | 1157 | default: |
1da177e4 LT |
1158 | break; |
1159 | } | |
1160 | } | |
1161 | ||
3bf2d28a | 1162 | /* check if the state machine was changed */ |
1da177e4 | 1163 | if (port->sm_periodic_state != last_state) { |
a4aee5c8 JP |
1164 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1165 | port->actor_port_number, last_state, | |
1166 | port->sm_periodic_state); | |
1da177e4 LT |
1167 | switch (port->sm_periodic_state) { |
1168 | case AD_NO_PERIODIC: | |
3bf2d28a | 1169 | port->sm_periodic_timer_counter = 0; |
1da177e4 LT |
1170 | break; |
1171 | case AD_FAST_PERIODIC: | |
3bf2d28a VF |
1172 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1173 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; | |
1da177e4 LT |
1174 | break; |
1175 | case AD_SLOW_PERIODIC: | |
3bf2d28a VF |
1176 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1177 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; | |
1da177e4 LT |
1178 | break; |
1179 | case AD_PERIODIC_TX: | |
d238d458 | 1180 | port->ntt = true; |
1da177e4 | 1181 | break; |
3bf2d28a | 1182 | default: |
1da177e4 LT |
1183 | break; |
1184 | } | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | /** | |
1189 | * ad_port_selection_logic - select aggregation groups | |
1190 | * @port: the port we're looking at | |
1191 | * | |
1192 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1193 | * selection logic is called in the inititalization (after all the handshkes), | |
1194 | * and after every lacpdu receive (if selected is off). | |
1195 | */ | |
1196 | static void ad_port_selection_logic(struct port *port) | |
1197 | { | |
1198 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1199 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1200 | struct list_head *iter; |
1201 | struct bonding *bond; | |
1202 | struct slave *slave; | |
1da177e4 LT |
1203 | int found = 0; |
1204 | ||
3bf2d28a | 1205 | /* if the port is already Selected, do nothing */ |
7bfc4753 | 1206 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1207 | return; |
1da177e4 | 1208 | |
3e36bb75 VF |
1209 | bond = __get_bond_by_port(port); |
1210 | ||
3bf2d28a | 1211 | /* if the port is connected to other aggregator, detach it */ |
1da177e4 | 1212 | if (port->aggregator) { |
3bf2d28a | 1213 | /* detach the port from its former aggregator */ |
128ea6c3 BD |
1214 | temp_aggregator = port->aggregator; |
1215 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1216 | last_port = curr_port, | |
3bf2d28a | 1217 | curr_port = curr_port->next_port_in_aggregator) { |
1da177e4 LT |
1218 | if (curr_port == port) { |
1219 | temp_aggregator->num_of_ports--; | |
3bf2d28a VF |
1220 | /* if it is the first port attached to the |
1221 | * aggregator | |
1222 | */ | |
1223 | if (!last_port) { | |
128ea6c3 BD |
1224 | temp_aggregator->lag_ports = |
1225 | port->next_port_in_aggregator; | |
3bf2d28a VF |
1226 | } else { |
1227 | /* not the first port attached to the | |
1228 | * aggregator | |
1229 | */ | |
128ea6c3 BD |
1230 | last_port->next_port_in_aggregator = |
1231 | port->next_port_in_aggregator; | |
1da177e4 LT |
1232 | } |
1233 | ||
3bf2d28a VF |
1234 | /* clear the port's relations to this |
1235 | * aggregator | |
1236 | */ | |
1da177e4 | 1237 | port->aggregator = NULL; |
128ea6c3 BD |
1238 | port->next_port_in_aggregator = NULL; |
1239 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1240 | |
d4471f5e VF |
1241 | netdev_dbg(bond->dev, "Port %d left LAG %d\n", |
1242 | port->actor_port_number, | |
1243 | temp_aggregator->aggregator_identifier); | |
3bf2d28a VF |
1244 | /* if the aggregator is empty, clear its |
1245 | * parameters, and set it ready to be attached | |
1246 | */ | |
7bfc4753 | 1247 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1248 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1249 | break; |
1250 | } | |
1251 | } | |
3bf2d28a VF |
1252 | if (!curr_port) { |
1253 | /* meaning: the port was related to an aggregator | |
1254 | * but was not on the aggregator port list | |
1255 | */ | |
d4471f5e VF |
1256 | net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
1257 | port->slave->bond->dev->name, | |
1258 | port->actor_port_number, | |
1259 | port->slave->dev->name, | |
1260 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1261 | } |
1262 | } | |
3bf2d28a | 1263 | /* search on all aggregators for a suitable aggregator for this port */ |
3e36bb75 | 1264 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 1265 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 | 1266 | |
3bf2d28a | 1267 | /* keep a free aggregator for later use(if needed) */ |
1da177e4 | 1268 | if (!aggregator->lag_ports) { |
7bfc4753 | 1269 | if (!free_aggregator) |
128ea6c3 | 1270 | free_aggregator = aggregator; |
1da177e4 LT |
1271 | continue; |
1272 | } | |
815117ad | 1273 | /* check if current aggregator suits us */ |
1274 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1275 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1055c9ab HE |
1276 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
1277 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1278 | ) && |
815117ad | 1279 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
1280 | !aggregator->is_individual) /* but is not individual OR */ | |
1da177e4 LT |
1281 | ) |
1282 | ) { | |
815117ad | 1283 | /* attach to the founded aggregator */ |
1da177e4 | 1284 | port->aggregator = aggregator; |
128ea6c3 BD |
1285 | port->actor_port_aggregator_identifier = |
1286 | port->aggregator->aggregator_identifier; | |
1287 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1288 | port->aggregator->num_of_ports++; |
128ea6c3 | 1289 | aggregator->lag_ports = port; |
d4471f5e VF |
1290 | netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", |
1291 | port->actor_port_number, | |
1292 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1293 | |
3bf2d28a | 1294 | /* mark this port as selected */ |
1da177e4 LT |
1295 | port->sm_vars |= AD_PORT_SELECTED; |
1296 | found = 1; | |
1297 | break; | |
1298 | } | |
1299 | } | |
1300 | ||
3bf2d28a VF |
1301 | /* the port couldn't find an aggregator - attach it to a new |
1302 | * aggregator | |
1303 | */ | |
1da177e4 LT |
1304 | if (!found) { |
1305 | if (free_aggregator) { | |
3bf2d28a | 1306 | /* assign port a new aggregator */ |
1da177e4 | 1307 | port->aggregator = free_aggregator; |
128ea6c3 BD |
1308 | port->actor_port_aggregator_identifier = |
1309 | port->aggregator->aggregator_identifier; | |
1da177e4 | 1310 | |
3bf2d28a VF |
1311 | /* update the new aggregator's parameters |
1312 | * if port was responsed from the end-user | |
1313 | */ | |
7bfc4753 BD |
1314 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1315 | /* if port is full duplex */ | |
1624db7b | 1316 | port->aggregator->is_individual = false; |
7bfc4753 | 1317 | else |
1624db7b | 1318 | port->aggregator->is_individual = true; |
1da177e4 LT |
1319 | |
1320 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1321 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1322 | port->aggregator->partner_system = |
1323 | port->partner_oper.system; | |
1324 | port->aggregator->partner_system_priority = | |
1325 | port->partner_oper.system_priority; | |
1055c9ab | 1326 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1327 | port->aggregator->receive_state = 1; |
1328 | port->aggregator->transmit_state = 1; | |
1329 | port->aggregator->lag_ports = port; | |
1330 | port->aggregator->num_of_ports++; | |
1331 | ||
3bf2d28a | 1332 | /* mark this port as selected */ |
1da177e4 LT |
1333 | port->sm_vars |= AD_PORT_SELECTED; |
1334 | ||
d4471f5e VF |
1335 | netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", |
1336 | port->actor_port_number, | |
1337 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1338 | } else { |
d4471f5e | 1339 | netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", |
1da177e4 LT |
1340 | port->actor_port_number, port->slave->dev->name); |
1341 | } | |
1342 | } | |
3bf2d28a VF |
1343 | /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE |
1344 | * in all aggregator's ports, else set ready=FALSE in all | |
1345 | * aggregator's ports | |
1346 | */ | |
1347 | __set_agg_ports_ready(port->aggregator, | |
1348 | __agg_ports_are_ready(port->aggregator)); | |
1da177e4 | 1349 | |
fd989c83 JV |
1350 | aggregator = __get_first_agg(port); |
1351 | ad_agg_selection_logic(aggregator); | |
1352 | } | |
1353 | ||
3bf2d28a | 1354 | /* Decide if "agg" is a better choice for the new active aggregator that |
fd989c83 JV |
1355 | * the current best, according to the ad_select policy. |
1356 | */ | |
1357 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1358 | struct aggregator *curr) | |
1359 | { | |
3bf2d28a | 1360 | /* 0. If no best, select current. |
fd989c83 JV |
1361 | * |
1362 | * 1. If the current agg is not individual, and the best is | |
1363 | * individual, select current. | |
1364 | * | |
1365 | * 2. If current agg is individual and the best is not, keep best. | |
1366 | * | |
1367 | * 3. Therefore, current and best are both individual or both not | |
1368 | * individual, so: | |
1369 | * | |
1370 | * 3a. If current agg partner replied, and best agg partner did not, | |
1371 | * select current. | |
1372 | * | |
1373 | * 3b. If current agg partner did not reply and best agg partner | |
1374 | * did reply, keep best. | |
1375 | * | |
1376 | * 4. Therefore, current and best both have partner replies or | |
1377 | * both do not, so perform selection policy: | |
1378 | * | |
1379 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1380 | * select by bandwidth. | |
1381 | * | |
1382 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1383 | */ | |
1384 | if (!best) | |
1385 | return curr; | |
1386 | ||
1387 | if (!curr->is_individual && best->is_individual) | |
1388 | return curr; | |
1389 | ||
1390 | if (curr->is_individual && !best->is_individual) | |
1391 | return best; | |
1392 | ||
1393 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1394 | return curr; | |
1395 | ||
1396 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1397 | return best; | |
1398 | ||
1399 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1400 | case BOND_AD_COUNT: | |
1401 | if (curr->num_of_ports > best->num_of_ports) | |
1402 | return curr; | |
1403 | ||
1404 | if (curr->num_of_ports < best->num_of_ports) | |
1405 | return best; | |
1406 | ||
1407 | /*FALLTHROUGH*/ | |
1408 | case BOND_AD_STABLE: | |
1409 | case BOND_AD_BANDWIDTH: | |
1410 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1411 | return curr; | |
1412 | ||
1413 | break; | |
1414 | ||
1415 | default: | |
d4471f5e VF |
1416 | net_warn_ratelimited("%s: Impossible agg select mode %d\n", |
1417 | curr->slave->bond->dev->name, | |
1418 | __get_agg_selection_mode(curr->lag_ports)); | |
fd989c83 | 1419 | break; |
1da177e4 | 1420 | } |
fd989c83 JV |
1421 | |
1422 | return best; | |
1da177e4 LT |
1423 | } |
1424 | ||
4cd6fe1c SH |
1425 | static int agg_device_up(const struct aggregator *agg) |
1426 | { | |
2430af8b | 1427 | struct port *port = agg->lag_ports; |
3bf2d28a | 1428 | |
2430af8b JB |
1429 | if (!port) |
1430 | return 0; | |
3bf2d28a VF |
1431 | |
1432 | return netif_running(port->slave->dev) && | |
1433 | netif_carrier_ok(port->slave->dev); | |
4cd6fe1c SH |
1434 | } |
1435 | ||
1da177e4 LT |
1436 | /** |
1437 | * ad_agg_selection_logic - select an aggregation group for a team | |
1438 | * @aggregator: the aggregator we're looking at | |
1439 | * | |
1440 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1441 | * |
1442 | * The logic of this function is to select the aggregator according to | |
1443 | * the ad_select policy: | |
1444 | * | |
1445 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1446 | * it, and to reselect the active aggregator only if the previous | |
1447 | * aggregator has no more ports related to it. | |
1448 | * | |
1449 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1450 | * bandwidth, and reselect whenever a link state change takes place or the | |
1451 | * set of slaves in the bond changes. | |
1452 | * | |
1453 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1454 | * (slaves), and reselect whenever a link state change takes place or the | |
1455 | * set of slaves in the bond changes. | |
1da177e4 LT |
1456 | * |
1457 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1458 | * __get_active_agg() won't work correctly. This function should be better | |
1459 | * called with the bond itself, and retrieve the first agg from it. | |
1460 | */ | |
fd989c83 | 1461 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1462 | { |
fd989c83 | 1463 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1464 | struct bonding *bond = agg->slave->bond; |
1465 | struct list_head *iter; | |
1466 | struct slave *slave; | |
1da177e4 | 1467 | struct port *port; |
1da177e4 | 1468 | |
49b7624e | 1469 | rcu_read_lock(); |
fd989c83 | 1470 | origin = agg; |
fd989c83 | 1471 | active = __get_active_agg(agg); |
4cd6fe1c | 1472 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1473 | |
be79bd04 | 1474 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1475 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
bef1fcce | 1476 | |
fd989c83 JV |
1477 | agg->is_active = 0; |
1478 | ||
4cd6fe1c | 1479 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1480 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1481 | } |
fd989c83 JV |
1482 | |
1483 | if (best && | |
1484 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
3bf2d28a | 1485 | /* For the STABLE policy, don't replace the old active |
fd989c83 JV |
1486 | * aggregator if it's still active (it has an answering |
1487 | * partner) or if both the best and active don't have an | |
1488 | * answering partner. | |
1489 | */ | |
1490 | if (active && active->lag_ports && | |
1491 | active->lag_ports->is_enabled && | |
1492 | (__agg_has_partner(active) || | |
3bf2d28a VF |
1493 | (!__agg_has_partner(active) && |
1494 | !__agg_has_partner(best)))) { | |
fd989c83 JV |
1495 | if (!(!active->actor_oper_aggregator_key && |
1496 | best->actor_oper_aggregator_key)) { | |
1497 | best = NULL; | |
1498 | active->is_active = 1; | |
1da177e4 LT |
1499 | } |
1500 | } | |
fd989c83 | 1501 | } |
1da177e4 | 1502 | |
fd989c83 JV |
1503 | if (best && (best == active)) { |
1504 | best = NULL; | |
1505 | active->is_active = 1; | |
1da177e4 LT |
1506 | } |
1507 | ||
be79bd04 | 1508 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1509 | if (best) { |
d4471f5e VF |
1510 | netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1511 | best->aggregator_identifier, best->num_of_ports, | |
1512 | best->actor_oper_aggregator_key, | |
1513 | best->partner_oper_aggregator_key, | |
1514 | best->is_individual, best->is_active); | |
1515 | netdev_dbg(bond->dev, "best ports %p slave %p %s\n", | |
1516 | best->lag_ports, best->slave, | |
1517 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1518 | |
be79bd04 | 1519 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1520 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
fd989c83 | 1521 | |
d4471f5e VF |
1522 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1523 | agg->aggregator_identifier, agg->num_of_ports, | |
1524 | agg->actor_oper_aggregator_key, | |
1525 | agg->partner_oper_aggregator_key, | |
1526 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1527 | } |
1528 | ||
be79bd04 | 1529 | /* check if any partner replys */ |
fd989c83 | 1530 | if (best->is_individual) { |
d4471f5e VF |
1531 | net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
1532 | best->slave ? | |
1533 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1534 | } |
1535 | ||
fd989c83 | 1536 | best->is_active = 1; |
d4471f5e VF |
1537 | netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", |
1538 | best->aggregator_identifier); | |
1539 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1540 | best->aggregator_identifier, best->num_of_ports, | |
1541 | best->actor_oper_aggregator_key, | |
1542 | best->partner_oper_aggregator_key, | |
1543 | best->is_individual, best->is_active); | |
1da177e4 | 1544 | |
3bf2d28a VF |
1545 | /* disable the ports that were related to the former |
1546 | * active_aggregator | |
1547 | */ | |
fd989c83 JV |
1548 | if (active) { |
1549 | for (port = active->lag_ports; port; | |
1550 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1551 | __disable_port(port); |
1552 | } | |
1553 | } | |
1554 | } | |
1555 | ||
3bf2d28a | 1556 | /* if the selected aggregator is of join individuals |
fd989c83 JV |
1557 | * (partner_system is NULL), enable their ports |
1558 | */ | |
1559 | active = __get_active_agg(origin); | |
1da177e4 | 1560 | |
fd989c83 JV |
1561 | if (active) { |
1562 | if (!__agg_has_partner(active)) { | |
1563 | for (port = active->lag_ports; port; | |
1564 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1565 | __enable_port(port); |
1566 | } | |
1567 | } | |
1568 | } | |
fd989c83 | 1569 | |
be79bd04 | 1570 | rcu_read_unlock(); |
1571 | ||
bef1fcce | 1572 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1573 | } |
1574 | ||
1575 | /** | |
1576 | * ad_clear_agg - clear a given aggregator's parameters | |
1577 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1578 | */ |
1579 | static void ad_clear_agg(struct aggregator *aggregator) | |
1580 | { | |
1581 | if (aggregator) { | |
1624db7b | 1582 | aggregator->is_individual = false; |
1da177e4 LT |
1583 | aggregator->actor_admin_aggregator_key = 0; |
1584 | aggregator->actor_oper_aggregator_key = 0; | |
1585 | aggregator->partner_system = null_mac_addr; | |
1586 | aggregator->partner_system_priority = 0; | |
1587 | aggregator->partner_oper_aggregator_key = 0; | |
1588 | aggregator->receive_state = 0; | |
1589 | aggregator->transmit_state = 0; | |
1590 | aggregator->lag_ports = NULL; | |
1591 | aggregator->is_active = 0; | |
1592 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1593 | pr_debug("LAG %d was cleared\n", |
1594 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1595 | } |
1596 | } | |
1597 | ||
1598 | /** | |
1599 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1600 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1601 | */ |
1602 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1603 | { | |
1604 | if (aggregator) { | |
1605 | ad_clear_agg(aggregator); | |
1606 | ||
1607 | aggregator->aggregator_mac_address = null_mac_addr; | |
1608 | aggregator->aggregator_identifier = 0; | |
1609 | aggregator->slave = NULL; | |
1610 | } | |
1611 | } | |
1612 | ||
1613 | /** | |
1614 | * ad_initialize_port - initialize a given port's parameters | |
1615 | * @aggregator: the aggregator we're looking at | |
1616 | * @lacp_fast: boolean. whether fast periodic should be used | |
1da177e4 LT |
1617 | */ |
1618 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1619 | { | |
c7e703d0 HE |
1620 | static const struct port_params tmpl = { |
1621 | .system_priority = 0xffff, | |
1622 | .key = 1, | |
1623 | .port_number = 1, | |
1624 | .port_priority = 0xff, | |
1625 | .port_state = 1, | |
1626 | }; | |
7addeef6 HE |
1627 | static const struct lacpdu lacpdu = { |
1628 | .subtype = 0x01, | |
1629 | .version_number = 0x01, | |
1630 | .tlv_type_actor_info = 0x01, | |
1631 | .actor_information_length = 0x14, | |
1632 | .tlv_type_partner_info = 0x02, | |
1633 | .partner_information_length = 0x14, | |
1634 | .tlv_type_collector_info = 0x03, | |
1635 | .collector_information_length = 0x10, | |
1636 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1637 | }; | |
c7e703d0 | 1638 | |
1da177e4 LT |
1639 | if (port) { |
1640 | port->actor_port_number = 1; | |
1641 | port->actor_port_priority = 0xff; | |
1642 | port->actor_system = null_mac_addr; | |
1643 | port->actor_system_priority = 0xffff; | |
1644 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1645 | port->ntt = false; |
1da177e4 LT |
1646 | port->actor_admin_port_key = 1; |
1647 | port->actor_oper_port_key = 1; | |
3bf2d28a VF |
1648 | port->actor_admin_port_state = AD_STATE_AGGREGATION | |
1649 | AD_STATE_LACP_ACTIVITY; | |
1650 | port->actor_oper_port_state = AD_STATE_AGGREGATION | | |
1651 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 | 1652 | |
7bfc4753 | 1653 | if (lacp_fast) |
1da177e4 | 1654 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1655 | |
c7e703d0 HE |
1656 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1657 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1658 | ||
f48127b6 | 1659 | port->is_enabled = true; |
3bf2d28a | 1660 | /* private parameters */ |
1da177e4 LT |
1661 | port->sm_vars = 0x3; |
1662 | port->sm_rx_state = 0; | |
1663 | port->sm_rx_timer_counter = 0; | |
1664 | port->sm_periodic_state = 0; | |
1665 | port->sm_periodic_timer_counter = 0; | |
1666 | port->sm_mux_state = 0; | |
1667 | port->sm_mux_timer_counter = 0; | |
1668 | port->sm_tx_state = 0; | |
1669 | port->sm_tx_timer_counter = 0; | |
1670 | port->slave = NULL; | |
1671 | port->aggregator = NULL; | |
1672 | port->next_port_in_aggregator = NULL; | |
1673 | port->transaction_id = 0; | |
1674 | ||
7addeef6 | 1675 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1676 | } |
1677 | } | |
1678 | ||
1679 | /** | |
1680 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1681 | * @port: the port we're looking at | |
1682 | * | |
1683 | * Enable @port if it's in an active aggregator | |
1684 | */ | |
1685 | static void ad_enable_collecting_distributing(struct port *port) | |
1686 | { | |
1687 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1688 | pr_debug("Enabling port %d(LAG %d)\n", |
1689 | port->actor_port_number, | |
1690 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1691 | __enable_port(port); |
1692 | } | |
1693 | } | |
1694 | ||
1695 | /** | |
1696 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1697 | * @port: the port we're looking at | |
1da177e4 LT |
1698 | */ |
1699 | static void ad_disable_collecting_distributing(struct port *port) | |
1700 | { | |
3bf2d28a VF |
1701 | if (port->aggregator && |
1702 | !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), | |
1703 | &(null_mac_addr))) { | |
a4aee5c8 JP |
1704 | pr_debug("Disabling port %d(LAG %d)\n", |
1705 | port->actor_port_number, | |
1706 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1707 | __disable_port(port); |
1708 | } | |
1709 | } | |
1710 | ||
1da177e4 LT |
1711 | /** |
1712 | * ad_marker_info_received - handle receive of a Marker information frame | |
1713 | * @marker_info: Marker info received | |
1714 | * @port: the port we're looking at | |
1da177e4 | 1715 | */ |
1c3f0b8e MD |
1716 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1717 | struct port *port) | |
1da177e4 | 1718 | { |
1c3f0b8e | 1719 | struct bond_marker marker; |
1da177e4 | 1720 | |
3bf2d28a | 1721 | /* copy the received marker data to the response marker */ |
1c3f0b8e | 1722 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
3bf2d28a | 1723 | /* change the marker subtype to marker response */ |
128ea6c3 | 1724 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 | 1725 | |
3bf2d28a | 1726 | /* send the marker response */ |
1da177e4 | 1727 | if (ad_marker_send(port, &marker) >= 0) { |
a4aee5c8 JP |
1728 | pr_debug("Sent Marker Response on port %d\n", |
1729 | port->actor_port_number); | |
1da177e4 LT |
1730 | } |
1731 | } | |
1732 | ||
1733 | /** | |
1734 | * ad_marker_response_received - handle receive of a marker response frame | |
1735 | * @marker: marker PDU received | |
1736 | * @port: the port we're looking at | |
1737 | * | |
1738 | * This function does nothing since we decided not to implement send and handle | |
1739 | * response for marker PDU's, in this stage, but only to respond to marker | |
1740 | * information. | |
1741 | */ | |
1c3f0b8e | 1742 | static void ad_marker_response_received(struct bond_marker *marker, |
3bf2d28a | 1743 | struct port *port) |
1da177e4 | 1744 | { |
3bf2d28a VF |
1745 | marker = NULL; |
1746 | port = NULL; | |
1747 | /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ | |
1da177e4 LT |
1748 | } |
1749 | ||
3bf2d28a | 1750 | /* ========= AD exported functions to the main bonding code ========= */ |
1da177e4 | 1751 | |
3bf2d28a | 1752 | /* Check aggregators status in team every T seconds */ |
1da177e4 LT |
1753 | #define AD_AGGREGATOR_SELECTION_TIMER 8 |
1754 | ||
3bf2d28a VF |
1755 | /** |
1756 | * bond_3ad_initiate_agg_selection - initate aggregator selection | |
1757 | * @bond: bonding struct | |
fd989c83 JV |
1758 | * |
1759 | * Set the aggregation selection timer, to initiate an agg selection in | |
1760 | * the very near future. Called during first initialization, and during | |
1761 | * any down to up transitions of the bond. | |
1762 | */ | |
1763 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1764 | { | |
1765 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1766 | } |
1767 | ||
1da177e4 LT |
1768 | /** |
1769 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1770 | * @bond: bonding struct to work on | |
1771 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1772 | * |
1773 | * Can be called only after the mac address of the bond is set. | |
1774 | */ | |
56d00c67 | 1775 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1776 | { |
815117ad | 1777 | /* check that the bond is not initialized yet */ |
1778 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
3a6d54c5 | 1779 | bond->dev->dev_addr)) { |
1da177e4 | 1780 | |
163c8ff3 | 1781 | BOND_AD_INFO(bond).aggregator_identifier = 0; |
1da177e4 | 1782 | |
1da177e4 LT |
1783 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1784 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1785 | ||
3bf2d28a VF |
1786 | /* initialize how many times this module is called in one |
1787 | * second (should be about every 100ms) | |
1788 | */ | |
1da177e4 LT |
1789 | ad_ticks_per_sec = tick_resolution; |
1790 | ||
fd989c83 JV |
1791 | bond_3ad_initiate_agg_selection(bond, |
1792 | AD_AGGREGATOR_SELECTION_TIMER * | |
1793 | ad_ticks_per_sec); | |
1da177e4 LT |
1794 | } |
1795 | } | |
1796 | ||
1797 | /** | |
1798 | * bond_3ad_bind_slave - initialize a slave's port | |
1799 | * @slave: slave struct to work on | |
1800 | * | |
1801 | * Returns: 0 on success | |
1802 | * < 0 on error | |
1803 | */ | |
359632e5 | 1804 | void bond_3ad_bind_slave(struct slave *slave) |
1da177e4 LT |
1805 | { |
1806 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1807 | struct port *port; | |
1808 | struct aggregator *aggregator; | |
1809 | ||
359632e5 | 1810 | /* check that the slave has not been initialized yet. */ |
3fdddd85 | 1811 | if (SLAVE_AD_INFO(slave)->port.slave != slave) { |
1da177e4 | 1812 | |
359632e5 | 1813 | /* port initialization */ |
3fdddd85 | 1814 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 1815 | |
bf0239a9 | 1816 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 LT |
1817 | |
1818 | port->slave = slave; | |
3fdddd85 | 1819 | port->actor_port_number = SLAVE_AD_INFO(slave)->id; |
359632e5 | 1820 | /* key is determined according to the link speed, duplex and user key(which |
1821 | * is yet not supported) | |
359632e5 | 1822 | */ |
3bf2d28a | 1823 | port->actor_admin_port_key = 0; |
1da177e4 LT |
1824 | port->actor_admin_port_key |= __get_duplex(port); |
1825 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1826 | port->actor_oper_port_key = port->actor_admin_port_key; | |
3bf2d28a VF |
1827 | /* if the port is not full duplex, then the port should be not |
1828 | * lacp Enabled | |
1829 | */ | |
7bfc4753 | 1830 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1831 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
359632e5 | 1832 | /* actor system is the bond's system */ |
1da177e4 | 1833 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; |
3bf2d28a VF |
1834 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND |
1835 | * lacpdu's are sent in one second) | |
1836 | */ | |
1da177e4 LT |
1837 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
1838 | port->aggregator = NULL; | |
1839 | port->next_port_in_aggregator = NULL; | |
1840 | ||
1841 | __disable_port(port); | |
1da177e4 | 1842 | |
359632e5 | 1843 | /* aggregator initialization */ |
3fdddd85 | 1844 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 LT |
1845 | |
1846 | ad_initialize_agg(aggregator); | |
1847 | ||
1848 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
163c8ff3 | 1849 | aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; |
1da177e4 LT |
1850 | aggregator->slave = slave; |
1851 | aggregator->is_active = 0; | |
1852 | aggregator->num_of_ports = 0; | |
1853 | } | |
1da177e4 LT |
1854 | } |
1855 | ||
1856 | /** | |
1857 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1858 | * @slave: slave struct to work on | |
1859 | * | |
1860 | * Search for the aggregator that is related to this port, remove the | |
1861 | * aggregator and assign another aggregator for other port related to it | |
1862 | * (if any), and remove the port. | |
1863 | */ | |
1864 | void bond_3ad_unbind_slave(struct slave *slave) | |
1865 | { | |
1866 | struct port *port, *prev_port, *temp_port; | |
1867 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1868 | int select_new_active_agg = 0; | |
0b088264 VF |
1869 | struct bonding *bond = slave->bond; |
1870 | struct slave *slave_iter; | |
1871 | struct list_head *iter; | |
a361c83c | 1872 | |
e470259f NA |
1873 | /* Sync against bond_3ad_state_machine_handler() */ |
1874 | spin_lock_bh(&bond->mode_lock); | |
3fdddd85 | 1875 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1876 | port = &(SLAVE_AD_INFO(slave)->port); | |
1da177e4 | 1877 | |
3bf2d28a | 1878 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 1879 | if (!port->slave) { |
d4471f5e VF |
1880 | netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", |
1881 | slave->dev->name); | |
e470259f | 1882 | goto out; |
1da177e4 LT |
1883 | } |
1884 | ||
d4471f5e VF |
1885 | netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", |
1886 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1887 | |
1888 | /* Tell the partner that this port is not suitable for aggregation */ | |
1889 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1890 | __update_lacpdu_from_port(port); | |
1891 | ad_lacpdu_send(port); | |
1892 | ||
3bf2d28a | 1893 | /* check if this aggregator is occupied */ |
1da177e4 | 1894 | if (aggregator->lag_ports) { |
3bf2d28a VF |
1895 | /* check if there are other ports related to this aggregator |
1896 | * except the port related to this slave(thats ensure us that | |
1897 | * there is a reason to search for new aggregator, and that we | |
1898 | * will find one | |
1899 | */ | |
1900 | if ((aggregator->lag_ports != port) || | |
1901 | (aggregator->lag_ports->next_port_in_aggregator)) { | |
1902 | /* find new aggregator for the related port(s) */ | |
0b088264 | 1903 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 1904 | new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
3bf2d28a VF |
1905 | /* if the new aggregator is empty, or it is |
1906 | * connected to our port only | |
1907 | */ | |
1908 | if (!new_aggregator->lag_ports || | |
1909 | ((new_aggregator->lag_ports == port) && | |
1910 | !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 1911 | break; |
1da177e4 | 1912 | } |
0b088264 VF |
1913 | if (!slave_iter) |
1914 | new_aggregator = NULL; | |
3bf2d28a VF |
1915 | |
1916 | /* if new aggregator found, copy the aggregator's | |
1917 | * parameters and connect the related lag_ports to the | |
1918 | * new aggregator | |
1919 | */ | |
1da177e4 | 1920 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { |
d4471f5e VF |
1921 | netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", |
1922 | aggregator->aggregator_identifier, | |
1923 | new_aggregator->aggregator_identifier); | |
1da177e4 | 1924 | |
3bf2d28a VF |
1925 | if ((new_aggregator->lag_ports == port) && |
1926 | new_aggregator->is_active) { | |
d4471f5e | 1927 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
1da177e4 LT |
1928 | select_new_active_agg = 1; |
1929 | } | |
1930 | ||
1931 | new_aggregator->is_individual = aggregator->is_individual; | |
1932 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
1933 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
1934 | new_aggregator->partner_system = aggregator->partner_system; | |
1935 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
1936 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
1937 | new_aggregator->receive_state = aggregator->receive_state; | |
1938 | new_aggregator->transmit_state = aggregator->transmit_state; | |
1939 | new_aggregator->lag_ports = aggregator->lag_ports; | |
1940 | new_aggregator->is_active = aggregator->is_active; | |
1941 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
1942 | ||
3bf2d28a VF |
1943 | /* update the information that is written on |
1944 | * the ports about the aggregator | |
1945 | */ | |
128ea6c3 BD |
1946 | for (temp_port = aggregator->lag_ports; temp_port; |
1947 | temp_port = temp_port->next_port_in_aggregator) { | |
1948 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
1949 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
1950 | } | |
1951 | ||
1da177e4 | 1952 | ad_clear_agg(aggregator); |
a361c83c | 1953 | |
7bfc4753 | 1954 | if (select_new_active_agg) |
1da177e4 | 1955 | ad_agg_selection_logic(__get_first_agg(port)); |
1da177e4 | 1956 | } else { |
d4471f5e | 1957 | netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); |
1da177e4 | 1958 | } |
3bf2d28a VF |
1959 | } else { |
1960 | /* in case that the only port related to this | |
1961 | * aggregator is the one we want to remove | |
1962 | */ | |
1da177e4 | 1963 | select_new_active_agg = aggregator->is_active; |
1da177e4 LT |
1964 | ad_clear_agg(aggregator); |
1965 | if (select_new_active_agg) { | |
d4471f5e | 1966 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 1967 | /* select new active aggregator */ |
74684493 VF |
1968 | temp_aggregator = __get_first_agg(port); |
1969 | if (temp_aggregator) | |
1970 | ad_agg_selection_logic(temp_aggregator); | |
1da177e4 LT |
1971 | } |
1972 | } | |
1973 | } | |
1974 | ||
d4471f5e | 1975 | netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); |
3bf2d28a VF |
1976 | |
1977 | /* find the aggregator that this port is connected to */ | |
0b088264 | 1978 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 1979 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
1da177e4 | 1980 | prev_port = NULL; |
3bf2d28a | 1981 | /* search the port in the aggregator's related ports */ |
128ea6c3 BD |
1982 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
1983 | prev_port = temp_port, | |
3bf2d28a VF |
1984 | temp_port = temp_port->next_port_in_aggregator) { |
1985 | if (temp_port == port) { | |
1986 | /* the aggregator found - detach the port from | |
1987 | * this aggregator | |
1988 | */ | |
7bfc4753 | 1989 | if (prev_port) |
1da177e4 | 1990 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 1991 | else |
1da177e4 | 1992 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 1993 | temp_aggregator->num_of_ports--; |
128ea6c3 | 1994 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 | 1995 | select_new_active_agg = temp_aggregator->is_active; |
1da177e4 LT |
1996 | ad_clear_agg(temp_aggregator); |
1997 | if (select_new_active_agg) { | |
d4471f5e | 1998 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 1999 | /* select new active aggregator */ |
1da177e4 LT |
2000 | ad_agg_selection_logic(__get_first_agg(port)); |
2001 | } | |
2002 | } | |
2003 | break; | |
2004 | } | |
2005 | } | |
2006 | } | |
128ea6c3 | 2007 | port->slave = NULL; |
e470259f NA |
2008 | |
2009 | out: | |
2010 | spin_unlock_bh(&bond->mode_lock); | |
1da177e4 LT |
2011 | } |
2012 | ||
2013 | /** | |
2014 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2015 | * @bond: bonding struct to work on | |
2016 | * | |
2017 | * The state machine handling concept in this module is to check every tick | |
2018 | * which state machine should operate any function. The execution order is | |
2019 | * round robin, so when we have an interaction between state machines, the | |
2020 | * reply of one to each other might be delayed until next tick. | |
2021 | * | |
2022 | * This function also complete the initialization when the agg_select_timer | |
2023 | * times out, and it selects an aggregator for the ports that are yet not | |
2024 | * related to any aggregator, and selects the active aggregator for a bond. | |
2025 | */ | |
1b76b316 | 2026 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2027 | { |
1b76b316 JV |
2028 | struct bonding *bond = container_of(work, struct bonding, |
2029 | ad_work.work); | |
1da177e4 | 2030 | struct aggregator *aggregator; |
3c4c88a1 VF |
2031 | struct list_head *iter; |
2032 | struct slave *slave; | |
2033 | struct port *port; | |
5e5b0665 | 2034 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
1da177e4 | 2035 | |
e470259f NA |
2036 | /* Lock to protect data accessed by all (e.g., port->sm_vars) and |
2037 | * against running with bond_3ad_unbind_slave. ad_rx_machine may run | |
2038 | * concurrently due to incoming LACPDU as well. | |
2039 | */ | |
b7435628 | 2040 | spin_lock_bh(&bond->mode_lock); |
be79bd04 | 2041 | rcu_read_lock(); |
1f2cd845 | 2042 | |
be79bd04 | 2043 | /* check if there are any slaves */ |
0965a1f3 | 2044 | if (!bond_has_slaves(bond)) |
1da177e4 | 2045 | goto re_arm; |
1da177e4 | 2046 | |
be79bd04 | 2047 | /* check if agg_select_timer timer after initialize is timed out */ |
3bf2d28a VF |
2048 | if (BOND_AD_INFO(bond).agg_select_timer && |
2049 | !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
be79bd04 | 2050 | slave = bond_first_slave_rcu(bond); |
3fdddd85 | 2051 | port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; |
fe9323da | 2052 | |
be79bd04 | 2053 | /* select the active aggregator for the bond */ |
fe9323da | 2054 | if (port) { |
1da177e4 | 2055 | if (!port->slave) { |
d4471f5e VF |
2056 | net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", |
2057 | bond->dev->name); | |
1da177e4 LT |
2058 | goto re_arm; |
2059 | } | |
2060 | ||
2061 | aggregator = __get_first_agg(port); | |
2062 | ad_agg_selection_logic(aggregator); | |
2063 | } | |
f0c76d61 | 2064 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2065 | } |
2066 | ||
be79bd04 | 2067 | /* for each port run the state machines */ |
2068 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3fdddd85 | 2069 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2070 | if (!port->slave) { |
d4471f5e | 2071 | net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", |
86a2b9cf | 2072 | bond->dev->name); |
1da177e4 LT |
2073 | goto re_arm; |
2074 | } | |
2075 | ||
2076 | ad_rx_machine(NULL, port); | |
2077 | ad_periodic_machine(port); | |
2078 | ad_port_selection_logic(port); | |
2079 | ad_mux_machine(port); | |
2080 | ad_tx_machine(port); | |
2081 | ||
be79bd04 | 2082 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2083 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2084 | port->sm_vars &= ~AD_PORT_BEGIN; |
1da177e4 LT |
2085 | } |
2086 | ||
2087 | re_arm: | |
5e5b0665 | 2088 | bond_for_each_slave_rcu(bond, slave, iter) { |
2089 | if (slave->should_notify) { | |
2090 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2091 | break; | |
2092 | } | |
2093 | } | |
be79bd04 | 2094 | rcu_read_unlock(); |
b7435628 | 2095 | spin_unlock_bh(&bond->mode_lock); |
5e5b0665 | 2096 | |
2097 | if (should_notify_rtnl && rtnl_trylock()) { | |
b0929915 | 2098 | bond_slave_state_notify(bond); |
5e5b0665 | 2099 | rtnl_unlock(); |
2100 | } | |
be79bd04 | 2101 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2102 | } |
2103 | ||
2104 | /** | |
2105 | * bond_3ad_rx_indication - handle a received frame | |
2106 | * @lacpdu: received lacpdu | |
2107 | * @slave: slave struct to work on | |
2108 | * @length: length of the data received | |
2109 | * | |
2110 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2111 | * received frames (loopback). Since only the payload is given to this | |
2112 | * function, it check for loopback. | |
2113 | */ | |
3bf2d28a VF |
2114 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, |
2115 | u16 length) | |
1da177e4 LT |
2116 | { |
2117 | struct port *port; | |
13a8e0c8 | 2118 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2119 | |
2120 | if (length >= sizeof(struct lacpdu)) { | |
2121 | ||
3fdddd85 | 2122 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2123 | |
2124 | if (!port->slave) { | |
d4471f5e VF |
2125 | net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", |
2126 | slave->dev->name, slave->bond->dev->name); | |
13a8e0c8 | 2127 | return ret; |
1da177e4 LT |
2128 | } |
2129 | ||
2130 | switch (lacpdu->subtype) { | |
2131 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2132 | ret = RX_HANDLER_CONSUMED; |
d4471f5e VF |
2133 | netdev_dbg(slave->bond->dev, "Received LACPDU on port %d\n", |
2134 | port->actor_port_number); | |
16d79d7d | 2135 | /* Protect against concurrent state machines */ |
e470259f | 2136 | spin_lock(&slave->bond->mode_lock); |
1da177e4 | 2137 | ad_rx_machine(lacpdu, port); |
e470259f | 2138 | spin_unlock(&slave->bond->mode_lock); |
1da177e4 LT |
2139 | break; |
2140 | ||
2141 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2142 | ret = RX_HANDLER_CONSUMED; |
3bf2d28a VF |
2143 | /* No need to convert fields to Little Endian since we |
2144 | * don't use the marker's fields. | |
2145 | */ | |
1da177e4 | 2146 | |
1c3f0b8e | 2147 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2148 | case AD_MARKER_INFORMATION_SUBTYPE: |
d4471f5e VF |
2149 | netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", |
2150 | port->actor_port_number); | |
1c3f0b8e | 2151 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2152 | break; |
2153 | ||
2154 | case AD_MARKER_RESPONSE_SUBTYPE: | |
d4471f5e VF |
2155 | netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", |
2156 | port->actor_port_number); | |
1c3f0b8e | 2157 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2158 | break; |
2159 | ||
2160 | default: | |
d4471f5e VF |
2161 | netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", |
2162 | port->actor_port_number); | |
1da177e4 LT |
2163 | } |
2164 | } | |
2165 | } | |
13a8e0c8 | 2166 | return ret; |
1da177e4 LT |
2167 | } |
2168 | ||
2169 | /** | |
2170 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2171 | * @slave: slave struct to work on | |
2172 | * | |
2173 | * Handle reselection of aggregator (if needed) for this port. | |
2174 | */ | |
2175 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2176 | { | |
2177 | struct port *port; | |
2178 | ||
3fdddd85 | 2179 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2180 | |
71a06c59 | 2181 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2182 | if (!port->slave) { |
d4471f5e VF |
2183 | netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", |
2184 | slave->dev->name); | |
1da177e4 LT |
2185 | return; |
2186 | } | |
2187 | ||
e470259f | 2188 | spin_lock_bh(&slave->bond->mode_lock); |
71a06c59 | 2189 | |
1da177e4 | 2190 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2191 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2192 | (__get_link_speed(port) << 1); | |
d4471f5e | 2193 | netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); |
71a06c59 | 2194 | /* there is no need to reselect a new aggregator, just signal the |
2195 | * state machines to reinitialize | |
2196 | */ | |
1da177e4 | 2197 | port->sm_vars |= AD_PORT_BEGIN; |
71a06c59 | 2198 | |
e470259f | 2199 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2200 | } |
2201 | ||
2202 | /** | |
2203 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2204 | * @slave: slave struct to work on | |
2205 | * | |
2206 | * Handle reselection of aggregator (if needed) for this port. | |
2207 | */ | |
2208 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2209 | { | |
2210 | struct port *port; | |
2211 | ||
3fdddd85 | 2212 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2213 | |
bca44a73 | 2214 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2215 | if (!port->slave) { |
d4471f5e VF |
2216 | netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", |
2217 | slave->dev->name); | |
1da177e4 LT |
2218 | return; |
2219 | } | |
2220 | ||
e470259f | 2221 | spin_lock_bh(&slave->bond->mode_lock); |
bca44a73 | 2222 | |
1da177e4 | 2223 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2224 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2225 | __get_duplex(port); | |
d4471f5e | 2226 | netdev_dbg(slave->bond->dev, "Port %d changed duplex\n", port->actor_port_number); |
bca44a73 | 2227 | /* there is no need to reselect a new aggregator, just signal the |
2228 | * state machines to reinitialize | |
2229 | */ | |
1da177e4 | 2230 | port->sm_vars |= AD_PORT_BEGIN; |
bca44a73 | 2231 | |
e470259f | 2232 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2233 | } |
2234 | ||
2235 | /** | |
2236 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2237 | * @slave: slave struct to work on | |
2238 | * @status: whether the link is now up or down | |
2239 | * | |
2240 | * Handle reselection of aggregator (if needed) for this port. | |
2241 | */ | |
2242 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2243 | { | |
2244 | struct port *port; | |
2245 | ||
3fdddd85 | 2246 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2247 | |
108db736 | 2248 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2249 | if (!port->slave) { |
d4471f5e VF |
2250 | netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", |
2251 | slave->dev->name); | |
1da177e4 LT |
2252 | return; |
2253 | } | |
2254 | ||
e470259f | 2255 | spin_lock_bh(&slave->bond->mode_lock); |
108db736 | 2256 | /* on link down we are zeroing duplex and speed since |
2257 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2258 | * instead of N/A(duplex) / 0(speed). | |
2259 | * | |
2260 | * on link up we are forcing recheck on the duplex and speed since | |
2261 | * some of he adaptors(ce1000.lan) report. | |
2262 | */ | |
1da177e4 | 2263 | if (link == BOND_LINK_UP) { |
f48127b6 | 2264 | port->is_enabled = true; |
1da177e4 | 2265 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2266 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2267 | __get_duplex(port); | |
1da177e4 | 2268 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2269 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2270 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2271 | } else { |
2272 | /* link has failed */ | |
f48127b6 | 2273 | port->is_enabled = false; |
1da177e4 | 2274 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2275 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2276 | ~AD_SPEED_KEY_BITS); | |
1da177e4 | 2277 | } |
d4471f5e VF |
2278 | netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", |
2279 | port->actor_port_number, | |
2280 | link == BOND_LINK_UP ? "UP" : "DOWN"); | |
108db736 | 2281 | /* there is no need to reselect a new aggregator, just signal the |
2282 | * state machines to reinitialize | |
2283 | */ | |
1da177e4 | 2284 | port->sm_vars |= AD_PORT_BEGIN; |
108db736 | 2285 | |
e470259f | 2286 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2287 | } |
2288 | ||
3bf2d28a VF |
2289 | /** |
2290 | * bond_3ad_set_carrier - set link state for bonding master | |
2291 | * @bond - bonding structure | |
2292 | * | |
2293 | * if we have an active aggregator, we're up, if not, we're down. | |
2294 | * Presumes that we cannot have an active aggregator if there are | |
2295 | * no slaves with link up. | |
ff59c456 | 2296 | * |
031ae4de JV |
2297 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2298 | * | |
ff59c456 JV |
2299 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2300 | * change, nonzero if it does. | |
2301 | */ | |
2302 | int bond_3ad_set_carrier(struct bonding *bond) | |
2303 | { | |
655f8919 | 2304 | struct aggregator *active; |
dec1e90e | 2305 | struct slave *first_slave; |
c1bc9644 | 2306 | int ret = 1; |
655f8919 | 2307 | |
be79bd04 | 2308 | rcu_read_lock(); |
2309 | first_slave = bond_first_slave_rcu(bond); | |
c1bc9644 VF |
2310 | if (!first_slave) { |
2311 | ret = 0; | |
2312 | goto out; | |
2313 | } | |
3fdddd85 | 2314 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); |
655f8919 | 2315 | if (active) { |
2316 | /* are enough slaves available to consider link up? */ | |
2317 | if (active->num_of_ports < bond->params.min_links) { | |
2318 | if (netif_carrier_ok(bond->dev)) { | |
2319 | netif_carrier_off(bond->dev); | |
c1bc9644 | 2320 | goto out; |
655f8919 | 2321 | } |
2322 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 | 2323 | netif_carrier_on(bond->dev); |
c1bc9644 | 2324 | goto out; |
ff59c456 | 2325 | } |
c1bc9644 | 2326 | } else if (netif_carrier_ok(bond->dev)) { |
ff59c456 | 2327 | netif_carrier_off(bond->dev); |
ff59c456 | 2328 | } |
c1bc9644 VF |
2329 | out: |
2330 | rcu_read_unlock(); | |
2331 | return ret; | |
ff59c456 JV |
2332 | } |
2333 | ||
1da177e4 | 2334 | /** |
318debd8 | 2335 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2336 | * @bond: bonding struct to work on |
2337 | * @ad_info: ad_info struct to fill with the bond's info | |
2338 | * | |
2339 | * Returns: 0 on success | |
2340 | * < 0 on error | |
2341 | */ | |
318debd8 | 2342 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2343 | struct ad_info *ad_info) | |
1da177e4 LT |
2344 | { |
2345 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2346 | struct list_head *iter; |
2347 | struct slave *slave; | |
1da177e4 LT |
2348 | struct port *port; |
2349 | ||
47e91f56 | 2350 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2351 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2352 | if (port->aggregator && port->aggregator->is_active) { |
2353 | aggregator = port->aggregator; | |
2354 | break; | |
2355 | } | |
2356 | } | |
2357 | ||
21f374c6 JP |
2358 | if (!aggregator) |
2359 | return -1; | |
2360 | ||
2361 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2362 | ad_info->ports = aggregator->num_of_ports; | |
2363 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2364 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2365 | ether_addr_copy(ad_info->partner_system, | |
2366 | aggregator->partner_system.mac_addr_value); | |
2367 | return 0; | |
1da177e4 LT |
2368 | } |
2369 | ||
318debd8 | 2370 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
2371 | { | |
2372 | int ret; | |
2373 | ||
47e91f56 | 2374 | rcu_read_lock(); |
318debd8 | 2375 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2376 | rcu_read_unlock(); |
318debd8 | 2377 | |
2378 | return ret; | |
2379 | } | |
2380 | ||
1da177e4 LT |
2381 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) |
2382 | { | |
454d7c9b | 2383 | struct bonding *bond = netdev_priv(dev); |
c33d7887 VF |
2384 | struct slave *slave, *first_ok_slave; |
2385 | struct aggregator *agg; | |
2386 | struct ad_info ad_info; | |
9caff1e7 | 2387 | struct list_head *iter; |
1da177e4 | 2388 | int slaves_in_agg; |
c33d7887 | 2389 | int slave_agg_no; |
c33d7887 | 2390 | int agg_id; |
1da177e4 | 2391 | |
318debd8 | 2392 | if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { |
d4471f5e | 2393 | netdev_dbg(dev, "__bond_3ad_get_active_agg_info failed\n"); |
a742e1f5 | 2394 | goto err_free; |
1da177e4 LT |
2395 | } |
2396 | ||
2397 | slaves_in_agg = ad_info.ports; | |
2398 | agg_id = ad_info.aggregator_id; | |
2399 | ||
2400 | if (slaves_in_agg == 0) { | |
d4471f5e | 2401 | netdev_dbg(dev, "active aggregator is empty\n"); |
a742e1f5 | 2402 | goto err_free; |
1da177e4 LT |
2403 | } |
2404 | ||
ee62e868 | 2405 | slave_agg_no = bond_xmit_hash(bond, skb) % slaves_in_agg; |
c33d7887 | 2406 | first_ok_slave = NULL; |
1da177e4 | 2407 | |
47e91f56 | 2408 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2409 | agg = SLAVE_AD_INFO(slave)->port.aggregator; |
c33d7887 VF |
2410 | if (!agg || agg->aggregator_identifier != agg_id) |
2411 | continue; | |
1da177e4 | 2412 | |
c33d7887 | 2413 | if (slave_agg_no >= 0) { |
8557cd74 | 2414 | if (!first_ok_slave && bond_slave_can_tx(slave)) |
c33d7887 | 2415 | first_ok_slave = slave; |
1da177e4 | 2416 | slave_agg_no--; |
c33d7887 VF |
2417 | continue; |
2418 | } | |
2419 | ||
8557cd74 | 2420 | if (bond_slave_can_tx(slave)) { |
a742e1f5 | 2421 | bond_dev_queue_xmit(bond, skb, slave->dev); |
c33d7887 | 2422 | goto out; |
1da177e4 LT |
2423 | } |
2424 | } | |
2425 | ||
2426 | if (slave_agg_no >= 0) { | |
d4471f5e VF |
2427 | netdev_err(dev, "Couldn't find a slave to tx on for aggregator ID %d\n", |
2428 | agg_id); | |
a742e1f5 | 2429 | goto err_free; |
1da177e4 LT |
2430 | } |
2431 | ||
c33d7887 | 2432 | /* we couldn't find any suitable slave after the agg_no, so use the |
3bf2d28a VF |
2433 | * first suitable found, if found. |
2434 | */ | |
c33d7887 | 2435 | if (first_ok_slave) |
a742e1f5 | 2436 | bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); |
2437 | else | |
2438 | goto err_free; | |
1da177e4 LT |
2439 | |
2440 | out: | |
ec634fe3 | 2441 | return NETDEV_TX_OK; |
a742e1f5 | 2442 | err_free: |
2443 | /* no suitable interface, frame not sent */ | |
2bb77ab4 | 2444 | dev_kfree_skb_any(skb); |
a742e1f5 | 2445 | goto out; |
1da177e4 LT |
2446 | } |
2447 | ||
de063b70 ED |
2448 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2449 | struct slave *slave) | |
1da177e4 | 2450 | { |
de063b70 ED |
2451 | struct lacpdu *lacpdu, _lacpdu; |
2452 | ||
3aba891d | 2453 | if (skb->protocol != PKT_TYPE_LACPDU) |
86e74986 | 2454 | return RX_HANDLER_ANOTHER; |
b3053251 | 2455 | |
de063b70 ED |
2456 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2457 | if (!lacpdu) | |
86e74986 | 2458 | return RX_HANDLER_ANOTHER; |
ab12811c | 2459 | |
86e74986 | 2460 | return bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2461 | } |
ba824a8b | 2462 | |
3bf2d28a VF |
2463 | /** |
2464 | * bond_3ad_update_lacp_rate - change the lacp rate | |
2465 | * @bond - bonding struct | |
2466 | * | |
ba824a8b PP |
2467 | * When modify lacp_rate parameter via sysfs, |
2468 | * update actor_oper_port_state of each port. | |
2469 | * | |
e470259f | 2470 | * Hold bond->mode_lock, |
ba824a8b PP |
2471 | * so we can modify port->actor_oper_port_state, |
2472 | * no matter bond is up or down. | |
2473 | */ | |
2474 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2475 | { | |
ba824a8b | 2476 | struct port *port = NULL; |
9caff1e7 | 2477 | struct list_head *iter; |
c509316b | 2478 | struct slave *slave; |
ba824a8b PP |
2479 | int lacp_fast; |
2480 | ||
ba824a8b | 2481 | lacp_fast = bond->params.lacp_fast; |
e470259f | 2482 | spin_lock_bh(&bond->mode_lock); |
9caff1e7 | 2483 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 2484 | port = &(SLAVE_AD_INFO(slave)->port); |
ba824a8b PP |
2485 | if (lacp_fast) |
2486 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2487 | else | |
2488 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
ba824a8b | 2489 | } |
e470259f | 2490 | spin_unlock_bh(&bond->mode_lock); |
ba824a8b | 2491 | } |